A cluster of thunderstorms formed along a boundary and produced wind damage southwest of Houston.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS HGX wrote it up.
A cluster of thunderstorms formed along a boundary and produced wind damage southwest of Houston.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Houston/Galveston, TX wrote its last area forecast discussion before the first event at Aug 13, 2:45 PM CST, 2 hours 10 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 345 PM CDT THU AUG 13 2009 .DISCUSSION... A RATHER ACTIVE RADAR PICTURE THIS AFTERNOON WITH A BROKEN LINE OF SHOWERS AND THUNDERSTORMS DEVELOPING ALONG THE REMNANTS OF A SURFACE BOUNDARY RUNNING ROUGHLY FROM COLLEGE STATION TO CONROE TO WINNIE. MUCH WEAKER CONVECTION HAS ALSO DEVELOPED IN OUR COASTAL COUNTIES AS THE SEABREEZE FRONT HAS BEGUN TO PUSH INLAND. MUCH LIKE YESTERDAY THE MAIN THREAT WITH THESE THUNDERSTORMS WILL BE STRONG DOWNBURST WINDS...WITH MODEL SOUNDINGS SHOWING AN INVERTED-V PROFILE AT LOW LEVELS. THIS CONVECTION SHOULD BEGIN TO WEAKEN AFTER SUNSET WITH THE LOSS OF DAYTIME HEATING. MODELS CONTINUE TO ADVERTISE A WEAKNESS DEVELOPING IN THE UPPER LEVEL RIDGE OVER THE NORTHERN GULF STATES THIS WEEKEND AND THEN MOVING INLAND EARLY NEXT WEEK. MODELS TODAY HAVE THIS OCCURRING SLIGHTLY FARTHER WEST THAN YESTERDAY BRINGING A GREATER CHANCE OF PRECIPITATION TO THE AREA. ECMWF IS A BIT MORE AGGRESSIVE WITH AREAL COVERAGE THAN THE GFS AND PREFER THE SLIGHTLY MORE CONSERVATIVE SOLUTION AT THIS TIME. TOWARDS THE END OF NEXT WEEK BOTH MODELS ARE IN GOOD AGREEMENT TRANSITIONING THE UPPER LEVEL RIDGE WESTWARD OVER THE SOUTHWESTERN US. 38 && .MARINE... LIGHT WINDS WILL CONTINUE WITH SEAS AROUND A FOOT FOR THE NEXT COUPLE OF DAYS. SOUTHERLY WINDS MAY INCREASE SOME OVER THE WEEKEND AND EARLY NEXT WEEK AS A LOW PRESSURE SYSTEM MOVES ACROSS THE PLAINS. SEAS MAY ONLY BUILD A FOOT OR TWO IN OFFSHORE AREAS. 39 && .AVIATION... REMNANTS OF A MCS OVER N TX WILL DRIFT INTO SE TX LATER THIS AFTERNOON. LIFT ASSOCIATED WITH THIS FEATURE HAS ALREADY KICKED OFF A FEW SHOWERS IN THE VICINITY OF KUTS WHERE A WEAK FRONTAL BOUNDARY HAS STALLED. EXPECT THAT THE ACTIVITY MAY EXPAND TOWARDS KCLL AND KCXO OVER THE NEXT HOUR OR TWO. MAY ALSO SEE CONVECTION DEVELOP CLOSER TO 19-20Z FOR THE HOUSTON METRO TERMINALS BUT HARD TO DETERMINE JUST HOW SCATTERED THE ACTIVITY WILL BE AND IF THERE WILL BE ANY MORE ORGANIZATION. CONVECTION WILL MORE THAN LIKELY BE DIURNALLY DRIVEN SO ONCE HEATING IS LOST...CONVECTION SHOULD DISSIPATE WHICH WILL BE AROUND 01Z THIS EVENING. OVERALL WIND FIELDS WILL BE WEAK EXPECT NEAR THE COAST AND HOUSTON WHERE THE SEA BREEZE MOVES INLAND LATER THIS EVENING. VFR CONDITIONS ARE EXPECTED TONIGHT WITH POSSIBLY SOME MVFR FOG AT KCXO AND KLBX. LOWER VSBY WILL LIKELY BE SHORT LIVED AND LIFT AROUND 13Z TOMORROW MORNING. 39 && .PRELIMINARY POINT TEMPS/POPS... COLLEGE STATION (CLL) 75 99 74 98 73 / 10 10 10 10 10 HOUSTON (IAH) 75 97 76 97 75 / 20 20 10 10 10 GALVESTON (GLS) 81 92 81 93 82 / 20 20 10 20 10 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...NONE. GM...NONE. && DISCUSSION...38 AVIATION/MARINE...39
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 637 AM CDT THU AUG 13 2009 GMZ330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214-226- 227-235>238-141145- AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND- GALVESTON-GALVESTON BAY-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY- MADISON-MATAGORDA-MATAGORDA BAY-MONTGOMERY-POLK-SAN JACINTO- TRINITY-WALKER-WALLER-WASHINGTON- WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL 20 NM TO 60 NM- WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL OUT 20 NM- WATERS FROM HIGH ISLAND TO FREEPORT 20 TO 60 NM- WATERS FROM HIGH ISLAND TO FREEPORT OUT 20 NM-WHARTON- 637 AM CDT THU AUG 13 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...THIS AFTERNOON AND EARLY EVENING ISOLATED AFTERNOON THUNDERSTORMS MAY DEVELOP ALONG THE SEA BREEZE BOUNDARY LATER TODAY. THE MAIN THREAT FOR ANY STRONG THUNDERSTORM WILL ONCE AGAIN BE DAMAGING DOWN BURST WINDS. .DAYS TWO AND SEVEN...THURSDAY AND WEDNESDAY ISOLATED THUNDERSTORMS ARE EXPECTED TO DEVELOP EACH AFTERNOON ALONG THE SEA BREEZE OR ALONG A LATE WEEKEND BROAD UPPER LEVEL LOW OVER THE GULF. THE POTENTIAL EXISTS FOR DAMAGING DOWN BURST WINDS AND LOCALLY HEAVY RAINFALL WITHIN THE STRONGEST STORMS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
200 PM CDT THU AUG 13 2009
TXZ177-178-199-132000-
MONTGOMERY-SAN JACINTO-WALKER-
200 PM CDT THU AUG 13 2009
...SPECIAL WEATHER STATEMENT...
AT 158 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 11 MILES NORTH OF
WILLIS TO 16 MILES EAST OF WILLIS...MOVING SOUTH AT 10 MPH.
PEA SIZE HAIL...WINDS GREATER THAN 40 MPH...CONTINUOUS CLOUD TO
GROUND LIGHTNING...HEAVY RAINFALL OF 1 TO 2 INCHES AN HOUR...ARE
POSSIBLE WITH THESE STORMS.
LOCATIONS IN THE PATH OF THESE STORMS INCLUDE...WOODLOCH...
WOODBRANCH...WILLIS...SPLENDORA...ROMAN FOREST...PATTON VILLAGE...
PANORAMA VILLAGE...NEW WAVERLY...CUT AND SHOOT AND CONROE.
GUSTY WINDS MAY CAUSE UNSECURED SMALL OBJECTS SUCH AS TRASH CANS TO
BLOW AROUND. AVOID TALL OUTDOOR OBJECTS THAT CAN ATTRACT LIGHTNING
AND DO NOT USE ELECTRICAL APPLIANCES OR A CORDED TELEPHONE A THE
LIGHTNING THREAT HAS PASSED. SEEK SHELTER IN A STURDY STRUCTURE OR
AUTOMOBILE UNTIL THESE STORMS HAVE PASSED.
LAT...LON 3022 9557 3069 9550 3054 9513 3037 9513
3035 9516 3025 9512 3016 9512
TIME...MOT...LOC 1859Z 005DEG 9KT 3058 9542 3040 9522SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
256 PM CDT THU AUG 13 2009
TXZ198-132100-
GRIMES-
256 PM CDT THU AUG 13 2009
...SPECIAL WEATHER STATEMENT...
AT 255 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 20 MILES NORTHEAST OF NAVASOTA...MOVING SOUTHWEST
AT 10 MPH.
PEA SIZE HAIL...WINDS GREATER THAN 40 MPH...CONTINUOUS CLOUD TO
GROUND LIGHTNING...HEAVY RAINFALL OF 1 TO 2 INCHES AN HOUR...ARE
POSSIBLE WITH THIS STORM.
LOCATIONS IN THE PATH OF THIS STORM INCLUDE...ROANS PRAIRIE...
CARLOS...BEDIAS...ANDERSON AND NAVASOTA.
GUSTY WINDS MAY CAUSE UNSECURED SMALL OBJECTS SUCH AS TRASH CANS TO
BLOW AROUND. AVOID TALL OUTDOOR OBJECTS THAT CAN ATTRACT LIGHTNING
AND DO NOT USE ELECTRICAL APPLIANCES OR A CORDED TELEPHONE A THE
LIGHTNING THREAT HAS PASSED. SEEK SHELTER IN A STURDY STRUCTURE OR
AUTOMOBILE UNTIL THIS STORM HAS PASSED.
LAT...LON 3082 9595 3063 9583 3061 9582 3038 9610
3043 9611 3043 9608 3044 9608 3046 9611
3070 9617
TIME...MOT...LOC 1956Z 052DEG 8KT 3066 9596PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
420 PM CDT THU AUG 13 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0432 PM TSTM WND GST BUSH-INTERCONTINENTAL A 29.98N 95.34W
08/12/2009 M70.00 MPH HARRIS TX ASOS
ASOS AT KIAH REPORTED A WIND GUST OF 61 KTS.
0450 PM TSTM WND DMG COLLEGE STATION 30.60N 96.31W
08/12/2009 BRAZOS TX PUBLIC
TREE LIMBS UP TO 3 INCHES IN DIAMETER SNAPPED OFF TREES.
0500 PM TSTM WND DMG COLLEGE STATION 30.60N 96.31W
08/12/2009 BRAZOS TX PUBLIC
FENCES DOWN AT GRAHAM ROAD. ALSO SCATTERED POWER OUTAGES.
0500 PM TSTM WND DMG COLLEGE STATION 30.60N 96.31W
08/12/2009 BRAZOS TX PUBLIC
GREENHOUSE DESTROYED...SATELLITE DISH BLOWN OFF AND TREE
LIMBS DOWN AT ELMO WEEDEN AND DYESS ROADS JUST EAST OF
COLLEGE STATION.
0500 PM TSTM WND DMG HOUSTON 29.77N 95.39W
08/12/2009 HARRIS TX EMERGENCY MNGR
BUSINESS FENCE SEGMENT DOWN AT 11800 BLOCK OF WEST
MONTGOMERY AT HWY 249.
0515 PM HAIL COLLEGE STATION 30.60N 96.31W
08/12/2009 E0.88 INCH BRAZOS TX PUBLIC
NICKEL SIZED HAIL SOUTHSIDE OF COLLEGE STATION...ALSO
SMALL TREE LIMBS DOWN AT AM COLLEGE CAMPUS.
0530 PM TSTM WND GST HOBBY AIRPORT 29.65N 95.28W
08/12/2009 M59.00 MPH HARRIS TX ASOS
SEVERE WIND GUSTS INCREASED AND CONTINUED FOR SEVERAL
MINUTES
0539 PM TSTM WND GST HOBBY AIRPORT 29.65N 95.28W
08/12/2009 M72.00 MPH HARRIS TX ASOS
CONTINUATION OF HIGH WINDS. SUSTAINED WINDS AS HIGH AS 55
MPH.
0600 PM TSTM WND DMG 1 W WASHINGTON 30.33N 96.17W
08/12/2009 WASHINGTON TX LAW ENFORCEMENT
TREES DOWN ALONG HWY 105
0610 PM TSTM WND DMG PEARLAND 29.56N 95.28W
08/12/2009 BRAZORIA TX PUBLIC
4 INCH TREE LIMB DOWN ON ROAD AT FITE ROAD AND FM 1185.
0625 PM TSTM WND DMG 10 ESE WHARTON 29.26N 95.95W
08/12/2009 WHARTON TX LAW ENFORCEMENT
TREE DOWN IN NEW GULF
0655 PM TSTM WND DMG NEEDVILLE 29.40N 95.84W
08/12/2009 FORT BEND TX LAW ENFORCEMENT
TREE BRANCHES DOWN IN NEEDVILLE
0728 PM HAIL EGYPT 29.41N 96.24W
08/12/2009 M0.88 INCH WHARTON TX LAW ENFORCEMENT
NICKEL SIZED HAIL AT EGYPT, GLEN FLORA AND SPANISH CAMP.
0750 PM HAIL 3 W NEEDVILLE 29.40N 95.90W
08/12/2009 E1.75 INCH FORT BEND TX PUBLIC
&&
DREILLYPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
435 PM CDT THU AUG 13 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0710 PM HAIL 3 W NEEDVILLE 29.40N 95.90W
08/12/2009 E1.75 INCH FORT BEND TX PUBLIC
&&
DHELVYThe Houston radar (KHGX), 52 km away, was scanning. The volume nearest the first event began at 22:54 UTC.
1 thunderstorm wind. Local standard time, as filed.
Wind damage to windows and roof of a business. Report relayed to EMC.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Texas in 2009Every state in 2009This day in weather historyWarnings in Texas, August 2009
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 195553.