January: Increasing Clouds/Rain & Warmer To End Month

[srainhoutx]

E-mail from Jeff:

SPC has issued a Tornado Watch for all of SE TX until 1100am.

Wind Advisory in effect until noon

Large line of strong to severe thunderstorms extends along and east of I-35 from near Austin to west of Victoria this morning. Ahead of this line, increasing large scale lift is starting to result in the formation of discrete cells from near Victoria to College Station. These cells are racing northward at 35-45mph in the very strong low level flow regime in place over the region. Low level shear profiles remain more than favorable for storm rotation and storms will have to be watched closely as they move eastward into the warm sector.

While the tornado threat remains across the area, it appears the main threat will be severe straight line winds along the leading edge of the main squall line. This line south of San Antonio is bowing eastward due to strong mid level flow wrapping around the southern side of the upper level storm centered over W TX. Punching of this line eastward is a classic wind damage setup as stronger winds above the surface are transported to the surface.

Note: Very strong inflow winds have been affecting the entire region overnight with wind gust of 40-45mph. These winds have relaxed a little in the past hour, but observation sites are still gusting well above 30mph. These winds have already resulted in damage to trees and power lines in the Katy, Kingwood, Humble, and Spring areas. Wind gust so far have been:

Sugar Land: 45
Wharton: 45
Katy: 45
BUSH IAH: 43

Heavy rainfall appears to be focused along I-35 where 3-5 inches has fallen overnight. Still wary of training cells starting to develop over the region from Wharton to College Station, but thus far rainfall totals have been manageable in this area. Still feel with the threat for cell training in an incredible moist air mass some hefty totals could result in a short period of time, but the main excessive rainfall threat looks to be north and just west of SE TX although our western counties from College Station to Columbus could be under the gun shortly. Will continue to go with widespread 1-2 inches and isolated 4-5 inches possible.

[srainhoutx]

Bow echo nearing Washington/Austin Counties. Heads ups folks in those areas...

[srainhoutx]

Folks in N Wharton/Colorado Counties heads up. Bow echo building S and nearing those areas

[Andrew]

Bow echo nearing Washington/Austin Counties. Heads ups folks in those areas...

[srainhoutx]

Starflight Helo doing water rescues in Bastrop area

[srainhoutx]

Tornado Warning for Burleson/Washington Counties

TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
643 AM CST WED JAN 25 2012

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* TORNADO WARNING FOR...
BURLESON COUNTY IN SOUTHEAST TEXAS...
NORTHWESTERN WASHINGTON COUNTY IN SOUTHEAST TEXAS...

* UNTIL 715 AM CST

* AT 637 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS TORNADO
WAS LOCATED 11 MILES WEST OF LAKE SOMERVILLE DAM... MOVING
NORTHEAST AT 50 MPH. THERE IS A SECOND POSSIBLE TORNADO LOCATED 5 MILES
SOUTHWEST OF CALDWELL.

* LOCATIONS IN THE TORNADO WARNING INCLUDE BUT ARE NOT LIMITED TO
SOMERVILLE AND CALDWELL.

[srainhoutx]

Folks in the Columbus area (Colorado County) heads up. Merging cells with some weak rotation noted.

[Andrew]

Tornado Warning for Burleson/Washington Counties

TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
643 AM CST WED JAN 25 2012

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* TORNADO WARNING FOR...
BURLESON COUNTY IN SOUTHEAST TEXAS...
NORTHWESTERN WASHINGTON COUNTY IN SOUTHEAST TEXAS...

* UNTIL 715 AM CST

* AT 637 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS TORNADO
WAS LOCATED 11 MILES WEST OF LAKE SOMERVILLE DAM... MOVING
NORTHEAST AT 50 MPH. THERE IS A SECOND POSSIBLE TORNADO LOCATED 5 MILES
SOUTHWEST OF CALDWELL.

* LOCATIONS IN THE TORNADO WARNING INCLUDE BUT ARE NOT LIMITED TO
SOMERVILLE AND CALDWELL.

[srainhoutx]

Training storms developing in Austin/Waller Counties as first line slows with the approach of main line further W with the surface low near Weimer

[srainhoutx]

[jasons2k]

I hope the file isn't too large - first time trying to upload GR2 from my Mac. It's a lovely sight though....:

[srainhoutx]

Tornado Warning for Brazos/Burleson Counties...

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
706 AM CST WED JAN 25 2012

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* TORNADO WARNING FOR...
CENTRAL BRAZOS COUNTY IN SOUTHEAST TEXAS...
EASTERN BURLESON COUNTY IN SOUTHEAST TEXAS...

* UNTIL 730 AM CST

* AT 700 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS TORNADO
WAS LOCATED NEAR SNOOK... MOVING NORTHEAST AT 40 MPH.

* LOCATIONS IN THE TORNADO WARNING INCLUDE BUT ARE NOT LIMITED TO
WELLBORN...WIXON VALLEY...COLLEGE STATION AND BRYAN.

[srainhoutx]

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
704 AM CST WED JAN 25 2012

THE NATIONAL WEATHER SERVICE IN AUSTIN SAN ANTONIO HAS ISSUED A

* FLASH FLOOD WARNING FOR...
FAYETTE COUNTY...

* UNTIL 1000 AM CST.

* AT 701 AM CST...NATIONAL WEATHER SERVICE METEOROLOGISTS HAVE
DETERMINED THAT RAINFALL ESTIMATES FROM DOPPLER RADAR INDICATE SLOW
MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS FAYETTE
COUNTY. ESTIMATED RADAR RAINFALL AMOUNTS RANGED FROM 2 TO 3 INCHES
WITHIN THE PAST HOUR. ADDITIONAL ONE OR TWO INCHES OF RAINFALL ARE
POSSIBLE AS THE STORMS MOVE EAST NORTHEAST AND AWAY FROM THE
FAYETTE COUNTY AREA WITHIN THE NEXT FEW HOURS.

* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
FLATONIA...LA GRANGE...CISTERN...MULDOON AND ROUND TOP.

[jasons2k]

Last time, the main bowing segment was on the south side of the metro area. This time, it looks like it will be the northside. It's forming near Washington/Fayette/Austin counties and pushing east.

[srainhoutx]

Last time, the main bowing segment was on the south side of the metro area. This time, it looks like it will be the northside. It's forming near Washington/Fayette/Austin counties and pushing east.

Agreed Jason. Appears to be heading along the I-10 Corridor. Concerning to see slowing in Fayette County. That will be a trouble maker a bit later in the morning.

[srainhoutx]

Severe Thunderstorm Warning for Brazos, Burleson, Grimes, Madison, Waller and Washington Counties

[srainhoutx]

Folks in Montgomery County, heads up. Bow echo heading E

[srainhoutx]

Folks in Austin County heads up. Cell approaching your northern area

[srainhoutx]

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
723 AM CST WED JAN 25 2012

THE NATIONAL WEATHER SERVICE IN LEAGUE CITY HAS ISSUED A

* TORNADO WARNING FOR...
SOUTHERN GRIMES COUNTY IN SOUTHEAST TEXAS...
NORTHWESTERN WALLER COUNTY IN SOUTHEAST TEXAS...
NORTHEASTERN WASHINGTON COUNTY IN SOUTHEAST TEXAS...

* UNTIL 800 AM CST

* AT 719 AM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS TORNADO
WAS LOCATED 9 MILES SOUTHWEST OF WASHINGTON... MOVING EAST AT 40
MPH.

* LOCATIONS IN THE TORNADO WARNING INCLUDE BUT ARE NOT LIMITED TO
PLANTERSVILLE AND NAVASOTA.

[srainhoutx]

Folks in Western Harris/Waller Counties heads up. Rapidly developing rotating cell moving N from Ft Bend County