Showers and thunderstorms developed across Southeast Texas on the back side of a mid and upper level low centered to the east along the Louisiana and Mississippi border. Some of the stronger thunderstorms became severe and produced large hail and strong damaging winds.
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.
Showers and thunderstorms developed across Southeast Texas on the back side of a mid and upper level low centered to the east along the Louisiana and Mississippi border. Some of the stronger thunderstorms became severe and produced large hail and strong damaging winds.
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 26, 9:15 AM CST, 20 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 1015 AM CDT WED AUG 26 2009 .DISCUSSION... SCT TSTMS ARE OCCURRING ACROSS N CEN AND NE PORTIONS OF THE AREA THIS MORNING. THE ATMOSPHERE OVER SE TX IS MOIST AND UNSTABLE AND THE CWA IS LOCATED JUST WEST OF A MID/UPPER LEVEL LOW. THERE IS AN UPPER LEVEL JET STREAK TO THE WEST OF THE UPPER LOW THAT IS AIDING THE LIFT ACROSS THE AREA AND THIS WILL CONTINUE THROUGH THE DAY AND INTO THE EVENING. BELIEVE WE WILL SEE A FEW SVR TSTMS TODAY AND THIS EVENING WITH HAIL AND STRONG WINDS BEING THE MAIN THREAT. IN UPDATED ZONES HAVE MENTIONED THE SVR TSTM POSSIBILITY. SCT POPS LOOK APPROPRIATE...ALTHOUGH WE MAY SEE SOME CLUSTERS OF STRONG TO SEVERE TSTMS...JUST HARD TO PREDICT EXACTLY WHERE AT THIS POINT. 33 && .PRELIMINARY POINT TEMPS/POPS... COLLEGE STATION (CLL) 99 75 98 73 96 / 30 20 20 30 30 HOUSTON (IAH) 95 74 95 74 95 / 40 30 20 20 40 GALVESTON (GLS) 91 80 90 80 89 / 40 30 20 10 30 && .HGX WATCHES/WARNINGS/ADVISORIES... TX...NONE. GM...NONE. && DISCUSSION...33
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 441 AM CDT WED AUG 26 2009 TXZ163-164-176>179-195>200-210>214-226-227-235>238-270945- AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND- GALVESTON-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-MADISON-MATAGORDA- MONTGOMERY-POLK-SAN JACINTO-TRINITY-WALKER-WALLER-WASHINGTON- WHARTON- 441 AM CDT WED AUG 26 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT THUNDERSTORM ACTIVITY WILL BE POSSIBLE AGAIN TODAY WITH SOME STORMS BECOMING STRONG TO SEVERE. UPPER LEVEL WINDS MAY BE ENOUGH TO SUPPORT ORGANIZED THUNDERSTORM ACTIVITY WITH STRAIGHT LINE WINDS AND LOCALLY HEAVY RAINFALL AS THE MAIN THREATS. SOME SMALL HAIL WILL ALSO BE POSSIBLE IN SOME OF THE STRONG TO SEVERE STORMS. THUNDERSTORM ACTIVITY COULD DEVELOP OVER EAST TEXAS AND THEN MOVE INTO SOUTHEAST TEXAS BY THE AFTERNOON. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THUNDERSTORM CHANCES WILL CONTINUE THROUGH THE WEEKEND AND EARLY NEXT WEEK. A FRONTAL BOUNDARY WILL MOVE INTO THE REGION AND STALL FRIDAY INTO SATURDAY. THIS FRONTAL BOUNDARY ALONG WITH AN ACTIVE JET STREAM ARE EXPECTED TO SUPPORT THUNDERSTORM ACTIVITY THROUGH TUESDAY. SOME STORMS COULD BE STRONG WITH LOCALLY HEAVY RAINFALL BUT IT IS UNCERTAIN AS TO WHETHER ANY STORMS WILL BE SEVERE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TODAY.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX
941 AM CDT WED AUG 26 2009
TXZ177-199-261530-
MONTGOMERY-WALKER-
941 AM CDT WED AUG 26 2009
...SPECIAL WEATHER STATEMENT...
AT 939 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM 6 MILES NORTHEAST OF WILLIS...MOVING SOUTHWEST AT
15 MPH.
PEA SIZE HAIL...WINDS GREATER THAN 40 MPH...ARE POSSIBLE WITH THIS
STORM.
LOCATIONS IN THE PATH OF THIS STORM INCLUDE...LAKE CONROE DAM...
HUNTSVILLE STATE PARK...WOODLOCH...WILLIS...SHENANDOAH...PORTER
HEIGHTS...PANORAMA VILLAGE...OAK RIDGE NORTH...NEW WAVERLY...
MONTGOMERY...CUT AND SHOOT...CONROE AND CHATEAU WOODS.
GUSTY WINDS MAY CAUSE UNSECURED SMALL OBJECTS SUCH AS TRASH CANS TO
BLOW AROUND. SEEK SHELTER IN A STURDY STRUCTURE OR NON-CONVERTIBLE
AUTOMOBILE UNTIL THIS STORM HAS PASSED.
LAT...LON 3008 9534 3030 9576 3069 9556 3056 9535
3052 9536 3042 9532 3039 9525 3036 9521
3032 9522 3033 9521
TIME...MOT...LOC 1440Z 033DEG 13KT 3049 9542The Houston radar (KHGX), 116 km away, was scanning. The volume nearest the first event began at 15:33 UTC.
3 thunderstorm wind, 3 hail. Local standard time, as filed.
Strong thunderstorm winds downed trees and branches. Some large branches fell on homes.
A severe thunderstorm produced nickel sized hail.
A severe thunderstorm produced strong winds that downed some trees.
A severe thunderstorm produced strong winds that blew down a billboard along Business 59 near Louise.
A severe thunderstorm produced quarter size hail.
A severe thunderstorm produced golf ball size hail just west of Grapeland.
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: 184872, 184873, 184875, 184876, 184877, 184878.