Ida Is Now A Hurricane

GOES-16 satellite image from Weathernerds.

The world cannot catch a break in this crazy year of 2021. 2021 is just as crazy as 2020. The terrorist attack in Kabul has claimed a total of 182 lives including 13 American service members. There are now over 216 million confirmed COVID-19 cases worldwide. America has reported over 190,000 new cases and 1,304 new deaths. This is as of August 27, 2021. As of tonight, Hurricane Ida is exiting Cuba and entering into the Gulf of Mexico.

Here is a heat map from forecast models from the National Center for Atmospheric Research (NCAR). The heat is generated by QGIS. The heat map use points within 300 mile/480 kilometers radius. I used the latest forecast, which is 0000Z.

It is looking more likely Ida is going to make landfall somewhere between Louisiana, Mississippi, and Alabama. Texas and Florida are less likely to have Ida making landfall. The landfall risk includes New Orleans. New Orleans is mostly below sea level.

New Orleans was flooded out after Hurricane Katrina ravaged the Gulf Coast in 2005. New Orleans has pump stations to pump water out of the city. To make matters worse, some pump stations are out of service. Here is map of New Orleans pump stations that are online and offline. It is courtesy of The Times-Picayune and The New Orleans Advocate.

That would be a bad time if Ida is over them and the pumps are not fully online. If the dirty side of Ida is over New Orleans, there could be massive storm surge that floods the city. One area of concern is Lakeview, which is below sea level. Lakeview flooded after the levees failed from Hurricane Katrina. New Orleans area had 60 to 90 mph (96 to 144 km/h) winds with gusts of 90 to 135 mph (144 to 216 km/h) winds during Katrina. New Orleans area could have 100 to 120 mph (160 to 192 k/h) winds with gusts of 150 to 180 mph (240 to 270 km/h) from Ida.

Looking at satellite image, the circular shape of Ida suggests it is starting to intensify. Here is an intensity forecast model for Ida.

Most forecast models have Ida as a Category 3 within 24 hours. A couple have Ida peaking at Category 4 hurricane. Intensity forecast models are not reliable. I would not be surprised if Ida undergoes rapid intensification. Come morning, Ida is likely to be a Category 4 hurricane. I would not be surprised if Ida ends up being a Category 5 hurricane. Here is something that is unsettling. New Orleans is not going to issue mandatory evacuations and contraflows. As mentioned, New Orleans is vulnerable from flooding. Storm surge will certainly flood the city. Here is an excerpt from the article:

Hurricane Ida is approaching New Orleans more rapidly than city officials had initially prepared for, Mayor LaToya Cantrell said in an evening press conference Friday.

The storm, now projected to hit the Gulf Coast as a major Category 4 hurricane on Sunday, is moving so fast that the city will not be able to issue a mandatory evacuation for residents or implement contraflow for those evacuating voluntarily. New Orleans is expected to feel the effects of Ida as early as Saturday night.

“It is vitally important. We want our people to be in their safe spaces by, and no later than midnight tomorrow,” said Cantrell.

That is very unsettling to think about. If Ida was to flood New Orleans, the city is going to be cut off from the world. There maybe no power and water and this is on top of COVID-19 pandemic. Many New Orleans area hospitals have COVID patients and some are on life support. Evacuating them will be a logistical nightmare. Here is a dire warning for Hurricane Katrina on August 28, 2005. It could apply with Ida:

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE NEW ORLEANS LA
1011 AM CDT SUN AUG 28 2005

...DEVASTATING DAMAGE EXPECTED...

.HURRICANE KATRINA...A MOST POWERFUL HURRICANE WITH UNPRECEDENTED
STRENGTH...RIVALING THE INTENSITY OF HURRICANE CAMILLE OF 1969. 

MOST OF THE AREA WILL BE UNINHABITABLE FOR WEEKS...PERHAPS LONGER. AT
LEAST ONE HALF OF WELL CONSTRUCTED HOMES WILL HAVE ROOF AND WALL
FAILURE. ALL GABLED ROOFS WILL FAIL...LEAVING THOSE HOMES SEVERELY
DAMAGED OR DESTROYED.

THE MAJORITY OF INDUSTRIAL BUILDINGS WILL BECOME NON FUNCTIONAL.
PARTIAL TO COMPLETE WALL AND ROOF FAILURE IS EXPECTED. ALL WOOD
FRAMED LOW RISING APARTMENT BUILDINGS WILL BE DESTROYED. CONCRETE
BLOCK LOW RISE APARTMENTS WILL SUSTAIN MAJOR DAMAGE...INCLUDING SOME
WALL AND ROOF FAILURE.

HIGH RISE OFFICE AND APARTMENT BUILDINGS WILL SWAY DANGEROUSLY...A
FEW TO THE POINT OF TOTAL COLLAPSE. ALL WINDOWS WILL BLOW OUT.

AIRBORNE DEBRIS WILL BE WIDESPREAD...AND MAY INCLUDE HEAVY ITEMS SUCH
AS HOUSEHOLD APPLIANCES AND EVEN LIGHT VEHICLES. SPORT UTILITY
VEHICLES AND LIGHT TRUCKS WILL BE MOVED. THE BLOWN DEBRIS WILL CREATE
ADDITIONAL DESTRUCTION. PERSONS...PETS...AND LIVESTOCK EXPOSED TO THE
WINDS WILL FACE CERTAIN DEATH IF STRUCK.

POWER OUTAGES WILL LAST FOR WEEKS...AS MOST POWER POLES WILL BE DOWN
AND TRANSFORMERS DESTROYED. WATER SHORTAGES WILL MAKE HUMAN SUFFERING
INCREDIBLE BY MODERN STANDARDS.

THE VAST MAJORITY OF NATIVE TREES WILL BE SNAPPED OR UPROOTED. ONLY
THE HEARTIEST WILL REMAIN STANDING...BUT BE TOTALLY DEFOLIATED. FEW
CROPS WILL REMAIN. LIVESTOCK LEFT EXPOSED TO THE WINDS WILL BE
KILLED.

AN INLAND HURRICANE WIND WARNING IS ISSUED WHEN SUSTAINED WINDS NEAR
HURRICANE FORCE...OR FREQUENT GUSTS AT OR ABOVE HURRICANE FORCE...ARE
CERTAIN WITHIN THE NEXT 12 TO 24 HOURS.

ONCE TROPICAL STORM AND HURRICANE FORCE WINDS ONSET...DO NOT VENTURE
OUTSIDE!

$$

Reading that advisory from Katrina sends a chill down my spine. If Ida was to get close to New Orleans, it could be like Katrina again. Hopefully, that will not be the case.

I think Ida will be a major hurricane come morning. I would not be surprised if Ida is a Category 5 hurricane. Everyone along the Gulf Coast needs to be prepared right now. If you need to evacuate, please do so right now. It could be really bad.

The Three Hurricanes

Irma is a very formidable hurricane that is ravaging the Windward Islands and Lesser Antilles. Many buildings are destroyed and areas are flooded from the monster hurricane. Barbuda and Barbados are utterly leveled. Jose and Katia are now hurricanes. We have three hurricanes in the Atlantic at once. The last time that happened was in September 2010 with Igor, Julia, and Karl in September 2010. There were four hurricanes at once in September 1998; Georges, Ivan, Jeanne and Karl. In August 1893, there were four hurricanes active. This is a really active pattern we are in.

That infrared satellite image is over Barbuda, which has been really devastated by Irma. I can imagine the death toll could be quite horrendous.

Here is the latest heat map from various forecast models and GFS ensemble track guidance for Irma, Katia, and Jose. The GFS goes up to 10 days. Let’s start with Irma as it is the most dangerous.

The forecast has Irma moving west-northwest. across the Atlantic. It looks more likely Irma is going to hit Florida. An area of major concern is the Miami area. It is a large urban area with many buildings and buildings under construction. If Irma hit Miami area directly, it is going to be really bad. It could be more damaging that Katrina or even Harvey! It looks like Irma may go towards Georgia, South Carolina, and North Carolina, which is too early to tell.

Irma remains a dangerous Category 5 hurricane with 185 mph 296 km/h 161 knots hurricane. It has gusts of 235 mph 376 km/h 204 knots. The central pressure has dropped to 914 millibars. No hurricane in the Atlantic has maintained 180 mph 288 km/h 157 knots for that long! This is really telling!

The intensity forecast model keeps Irma as a Category 5 hurricane and weakens within 36 hours. Intensity forecasting is not that accurate as we have a long way to go. I would not be surprised if Irma becomes stronger with 190 mph 304 km/h 165 knot winds or greater! The central pressure is at its lowest as of right now.

Here is Hurricane Jose.

Jose looks to be a fish storm. However, I could not rule out another landfall after Irma, but that is too early to tell right now. Looking at Jose, I think it has a chance of being our next major hurricane.

Some of the forecast models have Jose as a major hurricane in the next 2 days. I think it could be a major hurricane as early as tomorrow.

Lastly, there is Katia.

The current forecast models have Katia making landfall on Mexico. The chance of Katia going northward towards Texas is low at this time. That is a good thing as they are still reeling from Harvey.

Most forecast models have Katia intensifying. A couple of them have Katia becoming a major hurricane in 36 hours. Again, I would not be surprised if Katia became a major hurricane as well. The Bay of Campeche is favorable for hurricanes to undergo rapid intensification.

Let’s go back to Irma. Currently, Irma is north of Puerto Rico. Here is the most recent Doppler radar from San Juan.

This is what a Category 5 monster looks like on Doppler radar. Despite being north of the island, the weather is really bad right now. Puerto Rico is experiencing tropical storm force winds with occasional hurricane force gusts.

The one hour rainfall totals are nothing short of impressive.

The southern eyewall have extremely heavy rain. Doppler radar estimates up to 8 inches/20.3 centimeters per hour! That is some intense stuff right there!

All forecast models are subject to change.

Here is what I think will happen.
-Irma will maintain and may get stronger.
-Dominican Republic, Haiti, and Cuba could be effected. Would not rule out a landfall.
-Bahamas could be next before Florida.
-Florida better prepare for Irma.

Everyone in Irma’s path better be super prepared for this. Irma is one vicious hurricane.

The forecast models came from NCAR-Tropical Cyclone Guidance, National Hurricane Center, and NWS San Juan. Special thanks to all of them.

Incredible Irma

Hurricane Irma is now a powerful Category 5 hurricane with 185 mph 296 km/h 161 knots hurricane. It has gusts of 235 mph 376 km/h 204 knots. It has a central pressure of 916 millibars. This is a very dangerous hurricane. Here is an infrared satellite up close of Irma.

Very impressive and scary I will say. Here is a wind radii map of Irma.

Hurricane force winds extend up to 50 miles 80 km/h 44 nautical miles. Tropical Storm force winds extend up to 175 miles 280 km/h 152 nautical miles. It is a fairly large hurricane. Antigua and Barbuda, Guadeloupe, and St. Kitts Nevis are experiencing tropical storm force winds. They could get hurricane force winds later tonight. It is going to be a very long night for them. If Irma makes landfall at its current strength, it would be one of the strongest tropical cyclones to make landfall in terms of wind. Antigua and Barbuda, Guadeloupe, and St. Kitts Nevis could see winds of 180 mph 288 km/h 157 knots with gusts as high as 270 mph 432 km/h 235 knots! The winds are enough to flatten buildings! There is also deadly storm surge and high waves battering the island. It is going to be really rough for them. Let’s hope they are prepared.

The latest Doppler radar shows that there is light rain right now. It is from Meteo-France and out of Guadeloupe and Martinique.

It shows the western eyewall, which could affect them later tonight. The eastern eyewall has the strongest winds and that could come while they sleep. It is going to be a nightmare for them.

Where does Irma go? Here is the latest heat map from various forecast models and GFS ensemble track guidance. The GFS goes up to 10 days.

The forecast models have going west-northwest towards Virgin Islands and Puerto Rico. From there, Irma could make landfall on Dominican Republic, Haiti, and Cuba. From there, Irma may hit Florida. Where it goes is anyone’s guess. The heat map generally shows once Irma reaches Florida, it goes northward. Keep in mind, this is 5 days away. The heat map shows a low chance that Irma may end up in the Gulf of Mexico. The reason the forecast has Irma going north is a cold front. The cold front is a major factor on where Irma will go. Keep in mind anything can happen and forecast is subject to change.

One wonders how long can Irma be a Category 5 hurricane. Category 5 hurricanes do not last long.

The forecast model keep Irma as a Category 5 hurricane for another 48 hours. If Irma is a Category 5 hurricane for that long, it would be the longest lived Category 5 hurricane. It would be the longest since Ivan in 2004. It may even exceed Ivan and challenge Allen in 1980 or 1932 Cuba Hurricane. That is very telling! Most forecast models have Irma weakening into a Category 4 hurricane, which is still extremely dangerous. However, intensity forecast models are not that reliable. I think Irma could still be a Category 5 hurricane by tomorrow and towards Florida. Again, anything can change.

Antigua, Barbados, Guadeloupe, and St. Kitts Nevis are going to have a long night tonight. Howling winds, heavy rain, high waves, and deadly storm surge are going to be very violent. They could see 8 to 12 inches/20.3 to 30.5 centimeters of rain with amount as high as 20 inches/50.8 centimeters.

Here is what I think will happen.
-Irma will maintain and may get stronger.
-The next morning will be horrible for Antigua, Barbados, Guadeloupe, and St. Kitts Nevis.

The forecast models came from NCAR-Tropical Cyclone Guidance, National Hurricane Center, and Meteo-France. Special thanks to all of them.

A New Normal Part 2

We are living in a new world and reality, a post-Harvey Texas. Just a week ago, a Category 4 monster, Hurricane Harvey was barreling down towards Rockport. Harvey was the first major hurricane to make landfall on America since Wilma in 2005. I think the National Hurricane Center (NHC) may increase Harvey’s peak to 140 mph 224 km/h 122 knots hurricane. Harvey being the first major hurricane to make landfall since Wilma has been largely overshadowed by the epic flooding that ravaged Houston and Beaumont area. That started on the night of August 26, 2017. A series of core rains that form near the center of Harvey.

One good news, the area of thunderstorms in the Southwest Gulf of Mexico does not pose a threat due to wind shear. It is an area of thunderstorms from a tropical wave. However, a cold front that is passing to Southeast Texas could set off thunderstorms and more rain as it picks up moisture from the tropical wave per NWS Houston.

000
FXUS64 KHGX 020220
AFDHGX

Area Forecast Discussion
National Weather Service Houston/Galveston TX
920 PM CDT Fri Sep 1 2017

.UPDATE...
Forecast for tonight looking on track. Updated temps and
dewpoints for trends.

Beat

&&

.PREV DISCUSSION... /ISSUED 628 PM CDT Fri Sep 1 2017/

AVIATION...
Sea breeze and outflow boundary are working their way inland with not
a whole lot of wind changes. SHRA activity that did develop late this
afternoon has now moved away from LBX. Look for light and variable
winds overnight with some patchy MVFR fog possible again at CXO. Expect
VFR conditions tomorrow with mainly light and variable winds. 42

PREV DISCUSSION... /ISSUED 343 PM CDT Fri Sep 1 2017/

DISCUSSION...
Current satellite is showing the typical afternoon cumulus field
developing across southeast Texas. There is a little enhanced
cumulus along the coast but the weak seabreeze is having trouble
generating enough lift for anything more than very isolated and
weak showers. This is expected again tomorrow and the dry weather
is greatly appreciated.

Models are still showing an upper level trough dropping into North
Texas tomorrow night though a significant change is a stronger
ridge over the southern Plains pinching the trough off from the
westerly flow and retrograding it back to the southwest earlier
than previous model runs. A more westerly position of this trough
means weaker lift and lower PoPs for Saturday night and Sunday.

Tropical moisture in the southern Gulf of Mexico will move north
early next week giving us our next decent chance for rainfall. At
the same time, a western U.S. ridge will amplify and northerly
upper flow will drive a cold front through the area Tuesday night
and early Wednesday. The tropical moisture already in place will
interact with this cold front producing a line of showers and
storms along the front. Fortunately the cold front will be moving
fairly quickly, especially for this time of year, pushing the rain
south by Wednesday afternoon. Behind the front, cool and dry air
will filter into the area bringing very pleasant temperatures with
highs only in the lower 80s Wed/Thu.

Hennig

There is also a tropical wave in the far eastern Atlantic that has a good chance of becoming Jose in the next five days. My main concern is Hurricane Irma, which is a Category 3 hurricane out in the Atlantic. Many are wondering where will Irma go. The latest heat map from various forecast models and GFS ensemble track guidance. The GFS goes up to 10 days.

Most forecast models have Irma moving west southwest direction in the next 5 days. From there, based on GFS ensembles, it could go anywhere. Some have Irma going into the Gulf of Mexico and hitting Louisiana in 10 days. Some have Irma hitting Florida to New York. This is too early too tell and this a low confidence forecast. Anything can happen between now and around September 11, which is the 16th anniversary of horrifying terrorist attacks that killed 3,000 people and destroyed the World Trade Center.

Many on social media may have seen this.

That is bogus. For one, the NHC does not issue forecasts 13 days in advance. They only go up to 5 days in advance. Nobody knows where Irma or any hurricane will go in the next 10 days, let alone 5 days.

The latest intensity forecast are in general agreement that Irma will be a major hurricane. A couple have Irma as a Category 2 fluctuating as Category 3, which happens due to eyewall replacement cycle.

I would not be surprised if Irma becomes a Category 5 hurricane, especially when it gets around the Caribbean. Hurricanes in that part of the Atlantic rarely become Category 5 hurricanes. Irma will have to be watched for September.

A New Normal Part 1

Texas and Louisiana are slowly recovering from the ravages of Harvey. It is a national tragedy. Harvey is now a tropical depression over Mississippi dumping heavy rain over Alabama, Mississippi, and Tennessee. They have seen 5 to 8 inches/12.7 to 20.3 centimeters of rain so far. Flooding continues to be a problem for many areas. The Addicks and Barker Reservoir are still bursting at the seams with too much water.

The death toll as of 8/31/2017 is nearly 40. I suspect the death toll is going to be much higher once the flood water recedes. The question is how many. Too early to speculate at this time. If I had to guess, it could be in the hundreds. Katrina claimed more than 1,800 lives, while 9/11 claimed 3,000 lives. 9/11 is a terrorist attack. Harvey could be the deadliest natural disaster since Katrina.

With Harvey no longer a problem, I turn my attention to three areas in the tropics. There are two areas that need to be watched, Hurricane Irma, a low pressure in the Gulf of Mexico, and tropical wave emerging from West Africa. Let’s start with Irma.

Irma is now a major hurricane with 115 mph 184 km/h 100 knots with gusts of 145 mph 232 km/h 126 knots. It is moving westward at this time. Many are wondering where will Irma go. Will Irma enter the Gulf of Mexico, make landfall on the East Coast, or become a fish storm? The latest heat map from various forecast models and GFS ensemble track guidance. The GFS goes up to 10 days.

The forecast models at this point do not have have it getting close to Texas. Some have Irma entering the Gulf of Mexico and hitting the Florida Panhandle. It looks to be a East Coast threat at this point. New York City area is included in the risk area. Again, this is 10 days from now and anything can change between now and next week. Since Irma is a major hurricane, the intensity forecast is interesting.

Most maintain Irma as a Category 3 hurricane. One has it as Category 4 hurricane in two days. Some have Irma as a Category 4 hurricane in three days. I think Irma has the potential to intensify into a Category 5 hurricane, especially when it gets closer to the Caribbean. Irma could be a problem starting next week as it gets closer to land. Irma needs to be watched closely.

Another area of concern is in the Southwest Gulf of Mexico. Here is a discussion from National Hurricane Center (NHC)

ZCZC MIATWOAT ALL
TTAA00 KNHC DDHHMM

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 PM EDT Thu Aug 31 2017

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

The National Hurricane Center is issuing advisories on Hurricane
Irma, located over the eastern Atlantic Ocean. The Weather
Prediction Center is issuing advisories on Tropical Depression
Harvey, located over northern Mississippi.

1. A tropical wave emerging over the far eastern Atlantic is moving
westward at about 15 mph. Environmental conditions are expected to
become more conducive for development over the weekend and early
next week while the system moves well to the south and southwest of
the Cabo Verde Islands.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...medium...40 percent.

2. A area of low pressure could form over the southwestern Gulf of
Mexico by the weekend, however, environmental conditions are
expected to become unfavorable for tropical cyclone formation by
that time. Interests along the Texas and Louisiana coasts are
encouraged to consult products from their local NWS Forecast Office
for more information about impacts from any non-tropical weather
systems.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...low...10 percent.

Public Advisories on Harvey are issued under WMO header WTNT34 KWNH
and under AWIPS header TCPAT4.

Forecaster Zelinsky

I do no think that will develop into something tropical. However, the moisture from it could be a factor for next week as a cold front passes. The cold front could trigger storms in areas that have been flooded. Not a good thing. That will also have to be watched.

Lastly, there is a tropical wave emerging out of West Africa. I think it will be tagged with an Invest in the next couple of days. It has a moderate chance of developing in the next five days. I would not be surprised if this becomes our next named storm, which would be Jose.

Here is what I think will happen.
-The area of thunderstorms in Southwest Gulf of Mexico bears watching, but I do not think it will develop.
-Irma needs to be watched and may pose a threat somewhere.
-Tropical wave emerging from West Africa needs to be watched. Could be Jose.

The forecast models came from NCAR-Tropical Cyclone Guidance and National Hurricane Center. Special thanks to all of them.

This is going to be a long road to recovery. It is a new normal for Texas.

Epic Flood Day 4

Last night, East Texas and Southwest Louisiana got hit hard by heavy rain. Epic flooding that plagued Houston area is now plaguing East Texas and Southwest Louisiana. Here is a rainfall total map.

Many areas saw over 10 inches/25.4 centimeters of rain. The highest total is over 26 inches/66.04 centimeters of rain! Beaumont/Port Arthur got over 26 inches of rain on August 29 and got 3 inches of rain today. That means they saw at least 29 inches of rain!

000
CXUS54 KLCH 300819
CF6BPT
PRELIMINARY LOCAL CLIMATOLOGICAL DATA (WS FORM: F-6)

STATION: BEAUMONT PORT ARTHUR
MONTH: AUGUST
YEAR: 2017
LATITUDE: 29 57 N
LONGITUDE: 94 1 W

TEMPERATURE IN F: :PCPN: SNOW: WIND :SUNSHINE: SKY :PK WND
================================================================================
1 2 3 4 5 6A 6B 7 8 9 10 11 12 13 14 15 16 17 18
12Z AVG MX 2MIN
DY MAX MIN AVG DEP HDD CDD WTR SNW DPTH SPD SPD DIR MIN PSBL S-S WX SPD DR
================================================================================

1 88 77 83 0 0 18 0.07 0.0 0 6.5 15 80 M M 6 19 90
2 86 74 80 -3 0 15 0.29 0.0 0 6.2 16 130 M M 5 138 21 140
3 91 74 83 0 0 18 0.02 0.0 0 5.1 14 30 M M 7 1 17 20
4 90 75 83 0 0 18 0.26 0.0 0 3.6 14 160 M M 5 13 17 160
5 87 74 81 -2 0 16 0.34 0.0 0 4.1 14 150 M M 3 13 20 120
6 92 75 84 1 0 19 0.34 0.0 0 7.5 21 290 M M 3 138 30 240
7 84 74 79 -4 0 14 0.73 0.0 0 4.6 20 280 M M 1 13 26 140
8 87 74 81 -2 0 16 2.42 0.0 0 5.5 20 190 M M 8 13 25 180
9 85 74 80 -3 0 15 0.38 0.0 0 4.5 16 140 M M 7 1 21 140
10 92 75 84 1 0 19 0.00 0.0 0 4.2 14 250 M M 3 1238 26 210
11 91 77 84 1 0 19 0.01 0.0 0 5.8 14 190 M M 1 18 18 180
12 92 74 83 0 0 18 0.00 0.0 0 6.1 14 190 M M 1 12 19 180
13 92 74 83 0 0 18 0.00 0.0 0 6.3 16 180 M M 2 13 24 250
14 93 76 85 2 0 20 0.00 0.0 0 7.7 15 190 M M 2 20 180
15 89 77 83 0 0 18 1.23 0.0 0 7.2 22 200 M M 1 138 31 160
16 91 78 85 2 0 20 0.02 0.0 0 9.0 20 240 M M 2 8 26 260
17 94 76 85 2 0 20 T 0.0 0 7.8 14 190 M M 1 19 220
18 95 76 86 3 0 21 0.00 0.0 0 4.7 14 100 M M 2 13 17 100
19 97 75 86 3 0 21 0.00 0.0 0 3.7 12 180 M M 2 138 15 160
20 92 78 85 2 0 20 0.85 M 0 3.0 8 120 M M 2 13 M M
21 92 77 85 2 0 20 0.01 0.0 0 4.3 17 100 M M 3 38 27 330
22 91 75 83 0 0 18 0.23 0.0 0 3.4 16 110 M M 2 13X 19 100
23 89 76 83 0 0 18 0.02 0.0 0 4.2 17 30 M M 2 13 22 40
24 92 74 83 0 0 18 0.04 0.0 0 7.7 23 70 M M 1 3 29 70
25 80 73 77 -6 0 12 1.23 0.0 0 14.3 23 100 M M 5 13 32 90
26 81 74 78 -5 0 13 2.74 0.0 0 13.1 26 90 M M 8 13 34 90
27 78 73 76 -7 0 11 8.98 0.0 0 15.5 30 110 M M 10 13 42 80
28 82 72 77 -6 0 12 5.52 0.0 0 19.2 28 50 M M 9 13 39 50
29 74 69 72 -10 0 726.03 0.0 0 22.1 35 360 M M 10 13 46 360
================================================================================
SM 2567 2170 0 492 51.76 0.0 216.9 M 114
================================================================================
AV 88.5 74.8 7.5 FASTST M M 4 MAX(MPH)
MISC ----> # 35 360 # 46 360
================================================================================

The heavy rain that plagued East Texas and Southwest Louisiana happened at night in the form of core rains. The same type of rain that plagued Houston area. Here is the 7 day total.

The rainfall total are from multi-sensor (radar and rain gauge) precipitation estimates obtained from National Weather Service (NWS) River Forecast Centers (RFCs) and mosaicked by National Centers for Environmental Prediction (NCEP). There are areas that have gotten over 50 inches/127 centimeters of rain. Some areas have nearly gotten 60 inches/152.4 centimeters of rain! I would not be surprised by the end of the week, some areas get up over 60 inches/152.4 centimeters of rain! The rainfall data is from Advanced Hydrologic Prediction Service (AHPS).

As things are drying out and we enter September, the tropics are brewing. You did not misread that. There are two areas of concern. Let’s start with the one in the Gulf of Mexico. There is an area of thunderstorms in the Southwest Gulf of Mexico. Yes, that is an area that the National Hurricane Center (NHC) is watching.

The NHC gives that area a low chance of developing in the next 5 days. Here is the discussion from NHC.

ZCZC MIATWOAT ALL
TTAA00 KNHC DDHHMM

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 PM EDT Wed Aug 30 2017

For the North Atlantic...Caribbean Sea and the Gulf of Mexico:

The National Hurricane Center is issuing advisories on Tropical
Depression Harvey, located over central Louisiana and on Tropical
Storm Irma, located over the eastern Atlantic Ocean.

1. An area of low pressure could form over the southwestern Gulf of
Mexico by the weekend. Development, if any, of this system is
expected to be slow to occur as the low moves slowly northward.
If this system does develop, it could bring additional rainfall to
portions of the Texas and Louisiana coasts. However, any rainfall
forecast is uncertain at this time range and it is too soon to
determine any specific impacts. Interests in these areas should
monitor the progress of this system for the next few days.
* Formation chance through 48 hours...low...near 0 percent.
* Formation chance through 5 days...low...20 percent.

Public Advisories on Irma are issued under WMO header
WTNT31 KNHC and under AWIPS header MIATCPAT1.
Forecast/Advisories on Irma are issued under WMO header
WTNT21 KNHC and under AWIPS header MIATCMAT1.

Forecaster Avila

Let’s hope that does not develop into something tropical. If it does, that could mean more rain for flood ravaged Texas and Louisiana. That would be very bad. Regardless, I will keep an eye on that area.

There is also newly developed Tropical Storm Irma. The big question is where Irma goes. Here is the latest heat map from various forecast models and GFS ensemble track guidance. The GFS goes up to 10 days.

Looking at the forecast track, it is looking to move more to the northwest. It could affect Bermuda or the East Coast. None of the forecast models have it going into the Gulf of Mexico at this time. Here is the most recent satellite image of Irma.

Looking at Irma, it looks like it is intensifying. The circular pattern and spiral arms suggest that Irma is undergoing rapid intensification. Here is the intensity forecast for Irma.

The forecast models forecasts a Category 1 hurricane in 12 hours. I think Irma could be a major hurricane as early as tomorrow. Frankly, I would not be surprised if Irma becomes a Category 5 hurricane while out in the Atlantic.

Here is what I think will happen.
-The area of thunderstorms in Southwest Gulf of Mexico bears watching.
-Irma will become a major hurricane as early as tomorrow.

The forecast models came from Advanced Hydrologic Prediction Service (AHPS), NCAR-Tropical Cyclone Guidance, National Hurricane Center, Naval Research Laboratory Tropical Cyclone Page, Weather.US, Weather Prediction Center (WPC), and National Weather Service. Special thanks to all of them.

Harvey is not just a Houston area disaster. It is a Texas disaster. A disaster that everyone has feared has come true. A disaster of truly epic proportions of a magnitude that one cannot even imagine.

Epic Flood Day 3

The helicopters flying and boats rescuing people from their flooded out homes. A sight all too common in the Houston area. The Addicks and Barker are bursting with so much water that it has be released to avoid catastrophic and widespread flooding at the cost of flooding neighborhoods. It is on the 12th anniversary of Hurricane Katrina making landfall on Louisiana and Mississippi. I am completely overwhelmed by this disaster as a weather buff. Here is a 7 day rainfall total map from Advanced Hydrologic Prediction Service (AHPS). It is unbelievable amounts I have seen.

The rainfall total are from multi-sensor (radar and rain gauge) precipitation estimates obtained from National Weather Service (NWS) River Forecast Centers (RFCs) and mosaicked by National Centers for Environmental Prediction (NCEP). There are areas that have gotten over 50 inches/127 centimeters of rain. Some areas have nearly gotten 60 inches/152.4 centimeters of rain! I would not be surprised by the end of the week, some areas get up over 60 inches/152.4 centimeters of rain!

Another mind boggling aspect is the large area that received heavy rains.

The green is where at least 10 inches/25.4 centimeters of rain fell. A large area received at least 10 inches/25.4 centimeters or greater! This has to go down as one of the largest rain events in America. We should know once Harvey passes. In the meantime, East Texas and Southwest Louisiana is getting hit by heavy rain. The latest Doppler radar out of NWS Lake Charles shows heavy rain as the storm is over the Gulf of Mexico.

Here is the 24 hour rainfall forecast from GFS, Canadian, EURO, and Weather Prediction Center (WPC).

The forecast models have the heaviest rains east of Houston. This time it is over East Texas and Southwest Louisiana. They have been getting plenty of heavy rain as well.

GFS: 11 inches/27.94 centimeters
Canadian: 10 inches/25.40 centimeters
EURO: 15 inches/38.10 centimeters
WPC: 10.74 inches/27.28 centimeters

As for Houston area, they could see still see rain, including occasional heavy rain. Looking at more moderate rain for Houston. The heavy rain has shifted to East Texas and Southwest Louisiana. Even New Orleans area is getting heavy rain and there is concern for flooding. Some of the pumps are not working, which could flood again like what happened with Katrina.

The million dollar question is where Harvey goes. Here is a heat map from various forecast models.

There is now a consensus among forecast models that Harvey will go northeast after making landfall on Southwest Louisiana as a tropical storm. Here is the latest from the National Hurricane Center. It is as of 10:00 PM or 2200 CDT:
Location: 29.0°N 93.6°W
Moving: NE at 6 mph 9 km/h 5.2 knots
Min pressure: 994 mb
Max sustained: 50 mph 80 km/h 44 knots

I do not think Harvey will intensify as it makes landfall again as a tropical storm. The reason is the core is a swirl of clouds with no thunderstorms. All the thunderstorms are north and east of the center. Once it makes landfall, Harvey moves quickly to the northeast. I say good riddance to Harvey.

Here is what I think will happen.
-Heavy rain at night, especially near and east of the center, which is East Texas and Southwest Louisiana.
-Not ruling out Houston area getting rain again tonight. Looking not as heavy. More like moderate rain.
-Rainfall amounts could range from 10 to 15 inches/25.4 to 38.1 centimeters of rain with isolated totals approaching and exceeding 20 inches/50.8 centimeters.

The forecast models came from NCAR-Tropical Cyclone Guidance, Weather.US, National Hurricane Center, and National Weather Service. Special thanks to all of them.

I am at total loss of words of with Harvey. I cannot imagine what people are going through. This a disaster that I cannot comprehend. It defies any description.