SE TX/SW LA weather: Much cooler and WET after Tuesday

[southerngale]

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
1246 PM CDT SAT APR 18 2009

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
HARRIS COUNTY IN SOUTHEAST TEXAS...
MONTGOMERY COUNTY IN SOUTHEAST TEXAS...

* UNTIL 245 PM CDT

* AT 1242 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT FLASH FLOODING WAS LIKELY FROM A CLUSTER OF THUNDERSTORMS
THAT EXTENDED FROM NEW CANEY TO HOUSTON TO SUGARLAND. FLOODING WAS
REPORTED NEAR HIGHWAY 290 AND FM 2920. RAINFALL AMOUNTS HAVE
AVERAGED ABOUT AN INCH AND ANOTHER 2 TO 3 INCHES OF RAIN WILL BE
POSSIBLE BY 2 PM.

* LOCATIONS IN THE FLOOD WARNING INCLUDE BUT ARE NOT LIMITED TO THE
MEDICAL CENTER...SPLASHTOWN...RELIANT PARK...PORTER...NEW CANEY...
MINUTE MAID PARK...MEMORIAL...LAKE HOUSTON DAM...LAKE CONROE DAM...
HOOKS AIRPORT...HERMAN PARK...THE GALLERIA...BUSH-INTERCONTINENTAL
AIRPORT...WOODLOCH...WOODBRANCH...WILLIS...WEST UNIVERSITY PLACE...
TOMBALL...THE WOODLANDS...STAGECOACH...SPRING VALLEY...SPRING...
SOUTHSIDE PLACE...SHENANDOAH...SHELDON...PORTER HEIGHTS...PINEY
POINT VILLAGE...PINEHURST...PANORAMA VILLAGE...OAK RIDGE NORTH...
KINGWOOD...KATY...JERSEY VILLAGE...JACINTO CITY...HUNTERS CREEK
VILLAGE...HUMBLE...HOUSTON...HILSHIRE VILLAGE...HEDWIG VILLAGE...
GALENA PARK...CUT AND SHOOT...CONROE...CLOVERLEAF...CHATEAU
WOODS...CHANNELVIEW...BUNKER HILL VILLAGE...BELLAIRE AND ALDINE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL MAY CAUSE FLOODING OF LAND
ADJACENT TO CREEKS AND BAYOUS...DRAINAGE AREAS AND LOW LYING SPOTS.
ADDITIONALLY...FLOODING MAY OCCUR ON...STREETS...FRONTAGE ROADS...AND
HIGHWAY UNDERPASSES. AVOID LOCATIONS WHERE WATER COVERS THE GROUND!

MOST FLOOD DEATHS OCCUR IN AUTOMOBILES. NEVER DRIVE YOUR VEHICLE INTO
AREAS WHERE THE WATER COVERS THE ROADWAY. FLOOD WATERS ARE USUALLY
DEEPER THAN THEY APPEAR. JUST ONE FOOT OF FLOWING WATER IS POWERFUL
ENOUGH TO SWEEP VEHICLES OFF THE ROAD. WHEN ENCOUNTERING FLOODED
ROADS MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

A FLOOD WATCH IS IN EFFECT UNTIL 9 PM FOR THE WARNED AREA.

[southerngale]

They just extended the tornado watch further east. Also a Flood Watch & various flood warnings for local rivers and bayous.

After many potent cells overnight, there hasn't been much activity here this morning. A little rain here and there, spells of thunder, but looking at radar, I think that's about to change real quick.

----------------------------------

Tornado Watch

TORNADO WATCH OUTLINE UPDATE FOR WT 166
NWS STORM PREDICTION CENTER NORMAN OK
100 PM CDT SAT APR 18 2009

TORNADO WATCH 166 IS IN EFFECT UNTIL 800 PM CDT FOR THE
FOLLOWING LOCATIONS

TXC199-241-245-351-361-403-405-419-457-190100-
/O.NEW.KWNS.TO.A.0166.090418T1800Z-090419T0100Z/

TX
. TEXAS COUNTIES INCLUDED ARE

HARDIN JASPER JEFFERSON
NEWTON ORANGE SABINE
SAN AUGUSTINE SHELBY TYLER
$$

[srainhoutx]

Update from Jeff Lindner...

NWS has issued a flash flood warning for Harris County until 245pm. At 1250pm radar indicated a cluster of thunderstorms from Sugar Land to The Woodlands producing rainfall rates of 1-2.5 inches per hour. ALERT stations in the western part of the county over Addicks have recorded between 2.0-2.5 inches with this cluster. Rainfall of 1-2.5 inches is likely as this cluster moves across the county with street flooding likely. Area watersheds will be responding to the heavy rainfall, but at this time are well within banks.

[KatDaddy]

Sky is going green in League City.

[srainhoutx]

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
122 PM CDT SAT APR 18 2009

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
NORTHERN BRAZORIA COUNTY IN SOUTHEAST TEXAS...
SOUTHEASTERN FORT BEND COUNTY IN SOUTHEAST TEXAS...
GALVESTON COUNTY IN SOUTHEAST TEXAS...

* UNTIL 415 PM CDT

* AT 116 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT FLASH FLOODING WAS LIKELY FROM A CLUSTER OF THUNDERSTORMS
FROM THOMPSONS TO PEARLAND TO DICKINSON. RAINFALL AMOUNTS HAVE
AVERAGE BETWEEN 2 AND 3 INCHES AND ANOTHER 1 TO 2 INCHES WILL BE
POSSIBLE IN THE WARNED AREA.

* LOCATIONS IN THE FLOOD WARNING INCLUDE BUT ARE NOT LIMITED TO
ROSHARON...KEMAH BOARDWALK...JULIFF...CHOCOLATE BAYOU...BRAZOS BEND
STATE PARK...TEXAS CITY...SANTA FE...SAN LEON...PEARLAND...
MANVEL...LIVERPOOL...LEAGUE CITY...LA MARQUE...KEMAH...IOWA
COLONY...HITCHCOCK...HILLCREST...FRIENDSWOOD...FRESNO...
DICKINSON...CLEAR LAKE SHORES...BROOKSIDE VILLAGE...BONNEY...
BACLIFF...ARCOLA AND ALVIN.

[vbhoutex]

And I thought my eyes were bugging a few hours ago. Jeez! It's pitch black here in Bear Creek.

[edit] Looking at radar trends, I'm getting extremely worried about training setting up over western Harris county. Can someone tell me I'm just over-reacting?

It is not an over-reaction. This rain stretches all the way to S of SA. It has now set up training from what I see on the radar.and the urban and small stream flood advisory is definitely warranted. I am preparing to go further into skywarn mode and may have to begin reporting from my area. It has been pouring at our house for the last 20-30 minutes with no let up. What I was concerned was going to happen with the massively unstable air mass is apparently beginning to happen and we may be looking at a massive flood event over much of the Houston metro and SE TX area. Please everyone in the Houston metro/SE TX area stay home. The streets will probably begin to fill quickly and become impassable in many areas unless this lets up soon and radar does not indicate that at this time.

Edit: 12.49pm-Our streets are now becoming impassable. The water is higher than I have seen it in a long time here.

Edit: 1:15 pm-Cars flooded out in our streets and the water is higher than every time except one(Allison)that I have seen in the 22 years we have lived in this house. It is still pouring and when I checked the gauge 20 minutes ago we were already at 3.5" and that was probably low due to the location of the gauge. Definitely a major flood event unfolding now in the Houston area. Everyone please be safe. I have already reported to NWS and we were just issued a Flash flood warning for Harris and Montgomery Counties.

Edit: 1:36 pm-Just emptied 4" out of the rain gauge and it is still raining though it has let up some. Streets still impassable. Radar returns to the SW concern me, especially if those move N of or along I-10(not that I'm not concerned for other areas, but areas N of I-10 have been POUNDED already).

[Tireman4]

We are getting POUNDED in Atascocita. My goodness.

[srainhoutx]

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
132 PM CDT SAT APR 18 2009

..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..

1102 AM FLASH FLOOD 10 NW HOUSTON 29.87N 95.50W
04/18/2009 HARRIS TX AMATEUR RADIO

8 TO 10 INCHES OF WATER COVERING THE ROADS NEAR HIGHWAY
290 AND JONES ROAD

0124 PM FLASH FLOOD HOUSTON 29.77N 95.39W
04/18/2009 HARRIS TX TRAINED SPOTTER

2.50 INCHES OF RAIN IN 40 MINUTES IN HOUSTON HEIGHTS.
OVER 80 PERCENT OF AREA ROADS ARE FLOODED.

[srainhoutx]

MESOSCALE DISCUSSION 0515
NWS STORM PREDICTION CENTER NORMAN OK
0143 PM CDT SAT APR 18 2009

AREAS AFFECTED...PORTIONS OF E-CENTRAL/SE TX

CONCERNING...TORNADO WATCH 165...

VALID 181843Z - 182015Z

THE SEVERE WEATHER THREAT FOR TORNADO WATCH 165 CONTINUES.

HIGH PRECIPITATION SUPERCELL STRUCTURES HAVE BEEN OBSERVED WITH
STORMS OCCURRING ALONG A LINE FROM 10 S OF HOU TO 50 N OF PSX...WITH
OCCASIONAL INTENSIFICATION OF LOW LVL ROTATION INDICATED BY KHGX SRV
DATA. OTHER STORMS /ONE ENTERING POLK COUNTY...AND A SECOND PASSING
NE OF THE HOUSTON METRO AREA/ HAVE ALSO DISPLAYED STRENGTHENING LOW
LVL ROTATIONAL SIGNATURES. RUC/SFCOA GUIDANCE SUGGESTS THESE STORMS
ARE OCCURRING WITHIN A ZONE OF STRONG LOW LVL WAA...WHICH IS
SUPPORTED BY RECENT SURFACE PRESSURE FALLS /2-4 MB PER 2 HRS/ OVER
THE REGION. GIVEN THE FAVORABLE ASCENT /WHICH IS FORECAST TO
GRADUALLY SHIFT TOWARD THE TX-LA BORDER THROUGH MID AFTERNOON/ AND
VERY MOIST LOW LVL INFLOW...STORMS SHOULD CONTINUE TO MAINTAIN
STRENGTH AS THEY MOVE ENE AT AROUND 20-25 KT.

MODIFIED RUC SOUNDINGS INVOF OF HOU INDICATE MLCAPE VALUES RESIDING
AROUND 1000 J/KG AND MLLCL HEIGHTS NEAR 500 M. IN ADDITION...AREA
VWP DATA DISPLAYS LARGE LOW LVL HODOGRAPH STRUCTURE...WITH 0-1 KM
SHEAR AOA 35 KT AND 0-1 KM SRH NEAR 500 M2/S2. THIS ENVIRONMENT WILL
CONTINUE TO SUPPORT STORMS PRODUCING STRONG LOW LVL ROTATION WITH A
THREAT OF TORNADOES.

..GARNER.. 04/18/2009


ATTN...WFO...LCH...SHV...HGX...CRP...

[vbhoutex]

I'm surprised my report is not in there. Oh well, I did and will continue to do my skywarn duties.

[srainhoutx]

:uarrow: I'm surprised my report is not in there. Oh well, I did and will continue to do my skywarn duties.

I suspect there is some lag time vbhoutex. So many reports are coming in I'm hearing. Have had a little over 7 inches of rain since yesterday at my location.

[vbhoutex]

:uarrow: I'm surprised my report is not in there. Oh well, I did and will continue to do my skywarn duties.

I suspect there is some lag time vbhoutex. So many reports are coming in I'm hearing. Have had a little over 7 inches of rain since yesterday at my location.

I'm sure that is it and if it isn't shown, so what? We are up to 5.7" so far for this event(2-days). We all needed the rain, but this is ridiculous.

[CajunMama]

Man o man, y'all are getting pounded with rain. Need supplies to help build an ark?



and btw...that is vbhoutx at the helm!

[Tireman4]

Man o man, y'all are getting pounded with rain. Need supplies to help build an ark?



and btw...that is vbhoutx at the helm!

That is about the size of it. I have lived in this subdivision in Atascocita for 5 years and have never seen it flood (even during Ike) until now. Wow.

[CajunMama]

That is about the size of it. I have lived in this subdivision in Atascocita for 5 years and have never seen it flood (even during Ike) until now. Wow.

Been there done that with floodwater. 6" in my new house back in '93. That's a lot of water coming down so hard and so fast on already saturated ground that it's not able to drain quickly enough and has nowhere to go.

[vbhoutex]

Man o man, y'all are getting pounded with rain. Need supplies to help build an ark?



and btw...that is vbhoutx at the helm!

DAMN WOODPECKERS!!!

This is the worst I have seen it since Allison. Ike didn't flood our area this bad.

[srainhoutx]

FLASH FLOOD WARNING
TXC015-089-157-481-182200-
/O.NEW.KHGX.FF.W.0010.090418T1902Z-090418T2200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
202 PM CDT SAT APR 18 2009

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* FLASH FLOOD WARNING FOR...
SOUTHEASTERN AUSTIN COUNTY IN SOUTHEAST TEXAS...
SOUTHEASTERN COLORADO COUNTY IN SOUTHEAST TEXAS...
FORT BEND COUNTY IN SOUTHEAST TEXAS...
WHARTON COUNTY IN SOUTHEAST TEXAS...

* UNTIL 500 PM CDT

* AT 157 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THAT FLASH FLOODING WAS LIKELY FROM A CLUSTER OF THUNDERSTORMS
FROM SPEAKS TO MISSOURI CITY. RAINFALL AMOUNTS HAVE AVERAGED 1 TO
3 INCHES OVER THIS AREA AND ANOTHER 1 TO 3 INCHES WILL BE
POSSIBLE.

* LOCATIONS IN THE FLOOD WARNING INCLUDE BUT ARE NOT LIMITED TO
PIERCE...NADA...HUNGERFORD...GARWOOD...DANEVANG...WHARTON...
WALLIS...TOWN WEST...SUGAR LAND...STAFFORD...SIMONTON...
ROSENBERG...RICHMOND...PLEAK...PECAN GROVE...ORCHARD...NEEDVILLE...
MISSOURI CITY...MISSION BEND...MEADOWS...KENDLETON...FULSHEAR...
FIRST COLONY...EL CAMPO...EAST BERNARD...BOLING-IAGO AND BEASLEY.

[Tireman4]

I think we are ok. It has not even come close to the house. Oh and I hear kids playing the water. Lightning, thunder and wind...kids are playing in it. Lovely.

[southerngale]

Edit: 12.49pm-Our streets are now becoming impassable. The water is higher than I have seen it in a long time here.

Edit: 1:15 pm-Cars flooded out in our streets and the water is higher than every time except one(Allison)that I have seen in the 22 years we have lived in this house. It is still pouring and when I checked the gauge 20 minutes ago we were already at 3.5" and that was probably low due to the location of the gauge. Definitely a major flood event unfolding now in the Houston area. Everyone please be safe. I have already reported to NWS and we were just issued a Flash flood warning for Harris and Montgomery Counties.

Edit: 1:36 pm-Just emptied 4" out of the rain gauge and it is still raining though it has let up some. Streets still impassable. Radar returns to the SW concern me, especially if those move N of or along I-10(not that I'm not concerned for other areas, but areas N of I-10 have been POUNDED already).

Geesh, David. And there's still stuff building to the southwest. Your house ok?

ROFL @ David at the helm, Frick.

[southerngale]

I think we are ok. It has not even come close to the house. Oh and I hear kids playing the water. Lightning, thunder and wind...kids are playing in it. Lovely.

Yikes... I hope you got them in. There will be plenty of time to play in the water after the lightning has passed. Kids are so fearless.

Good luck over there... it's been raining really hard here for quite a while now... not as long as over there though, since it's all moving east. Hopefully, I won't get the kind of totals you guys are getting. And there's no end in sight.