Thunderstorms developed along a stationary boundary near the Red River and moved south in the prevailing north flow aloft. The strongest storms produced wind gusts in excess of 70 mph in Grayson County.
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 FWD wrote it up.
Thunderstorms developed along a stationary boundary near the Red River and moved south in the prevailing north flow aloft. The strongest storms produced wind gusts in excess of 70 mph in Grayson County.
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 Fort Worth, TX wrote its last area forecast discussion before the first event at Aug 5, 1:42 PM CST, 1 hour 18 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE FORT WORTH TX 242 PM CDT WED AUG 5 2009 .DISCUSSION... THUNDERSTORMS DEVELOPED EARLIER TODAY ALONG A STATIONARY BOUNDARY ACROSS CENTRAL OKLAHOMA AIDED IN PART BY A SHORTWAVE TROF NOW CURRENTLY ENTERING NORTHEAST OKLAHOMA. PREVAILING NORTHWEST FLOW WILL BRING THIS CLUSTER OF CONVECTION INTO OUR NORTHERN AND NORTHEASTERN ZONES THIS AFTERNOON. WHILE WIDELY SCATTERED THUNDERSTORMS WILL BE POSSIBLE THROUGH THE EVENING HOURS AS FAR SOUTH AS THE I-20 CORRIDOR...THE BULK OF THE PRECIP IS EXPECTED TO STAY ALONG AND NORTHEAST OF A BOWIE TO PLANO TO CANTON LINE. GIVEN THE INSTABILITY AND MID LEVEL LAPSE RATES...QUARTER SIZE HAIL AND DOWNBURST WINDS IN EXCESS OF 60 MPH WILL BE THE PRIMARY HAZARDS WITH TODAYS ACTIVITY. CONVECTION SHOULD QUIET DOWN AFTER THE 03-06Z TIME FRAME...BUT ANOTHER ROUND OF SCATTERED THUNDERSTORMS MAY AFFECT THE RED RIVER/NORTHEAST COUNTIES DURING THE LATE MORNING/AFTERNOON HOURS ON THURSDAY. WILL MAINTAIN SLIGHT CHANCE POPS OVER OUR SOUTHEAST ON SATURDAY AFTERNOON AND EARLY EVENING FOR POSSIBLE SEA BREEZE CONVECTION MIGRATING NORTHWARD. OTHERWISE...WILL CARRY 20 POPS FOR ROUGHLY THE EASTERN HALF OF THE CWA ON A DAILY BASIS FROM SUNDAY THROUGH TUESDAY. WILL ALLOW HEAT ADVISORY TO CONTINUE THROUGH THURSDAY. HAVE GENERALLY STAYED CLOSE TO THE MAV/MEX NUMBERS /ESPECIALLY IN THE EXTENDED/ DUE TO THE UNCERTAIN CONVECTIVE FORECAST. EXPECT HIGHS IN THE UPPER 90S TO NEAR 100 FOR MUCH OF OUR AREA THROUGH FRIDAY... WITH READINGS IN THE MID TO UPPER 90S FOR THE WEEKEND AND BEYOND. SCHULTZ && .PRELIMINARY POINT TEMPS/POPS... DALLAS-FT. WORTH, TX 80 101 80 100 80 / 20 10 10 5 5 WACO, TX 77 102 78 102 80 / 10 10 10 5 5 PARIS, TX 75 97 74 98 76 / 30 20 10 10 10 DENTON, TX 75 100 78 100 79 / 20 20 10 5 5 MCKINNEY, TX 75 99 77 100 78 / 20 20 10 5 5 DALLAS, TX 82 101 80 100 82 / 20 10 10 5 5 TERRELL, TX 76 100 76 99 76 / 20 10 10 10 10 CORSICANA, TX 76 100 76 98 76 / 10 10 10 10 10 TEMPLE, TX 75 102 76 100 75 / 10 10 10 5 5 && .FWD WATCHES/WARNINGS/ADVISORIES... HEAT ADVISORY UNTIL 7 PM CDT THURSDAY FOR TXZ103-104-118-119-147- 148-158>162-174-175. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FORT WORTH TX 225 PM CDT WED AUG 5 2009 TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-061200- MONTAGUE-COOKE-GRAYSON-FANNIN-LAMAR-YOUNG-JACK-WISE-DENTON-COLLIN- HUNT-DELTA-HOPKINS-STEPHENS-PALO PINTO-PARKER-TARRANT-DALLAS- ROCKWALL-KAUFMAN-VAN ZANDT-RAINS-EASTLAND-ERATH-HOOD-SOMERVELL- JOHNSON-ELLIS-HENDERSON-COMANCHE-MILLS-HAMILTON-BOSQUE-HILL-NAVARRO- FREESTONE-ANDERSON-LAMPASAS-CORYELL-BELL-MCLENNAN-FALLS-LIMESTONE- LEON-MILAM-ROBERTSON- 225 PM CDT WED AUG 5 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT. A HEAT ADVISORY IS IN EFFECT FOR THE METROPLEX AND ALSO LOCATIONS ALONG AND SOUTH OF A LINE FROM WACO TO PALESTINE FOR AFTERNOON HEAT INDICES NEAR 105 DEGREES AND OVERNIGHT LOWS IN THE UPPER 70S. THUNDERSTORMS ARE POSSIBLE GENERALLY ALONG AND NORTH OF INTERSTATE 20 THROUGH THIS EVENING...WITH THE HIGHEST CHANCES ALONG THE RED RIVER. FREQUENT CLOUD TO GROUND LIGHTNING...QUARTER SIZE HAIL...AND WIND GUSTS IN EXCESS OF 60 MPH MAY ACCOMPANY THE STRONGEST STORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. THE HEAT ADVISORY CONTINUES THROUGH THURSDAY AFTERNOON FOR THE METROPLEX AND ALSO LOCATIONS ALONG AND SOUTH OF A LINE FROM WACO TO PALESTINE. THUNDERSTORMS WILL BE POSSIBLE ACROSS NORTHEAST SECTIONS OF NORTH TEXAS ON THURSDAY...AND OVER AREAS GENERALLY EAST OF INTERSTATE 35 SATURDAY THROUGH TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUESTED NORTH OF INTERSTATE 20 THROUGH THIS EVENING. SCHULTZ
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1027 AM CDT WED AUG 5 2009
TXZ095-106-051600-
LAMAR TX-DELTA TX-
1027 AM CDT WED AUG 5 2009
...SIGNIFICANT WEATHER ADVISORY FOR...
DELTA COUNTY
SOUTHERN LAMAR COUNTY
AT 1026 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 9 MILES SOUTH OF PARIS...MOVING SOUTHWEST AT 20
MPH.
CITIES IN THE PATH OF THIS STORM INCLUDE COOPER AND COOPER LAKE PARK.
VERY HEAVY RAIN AND WIND GUSTS OF 40 TO 50 MPH ARE LIKELY WITH THIS
STORM.
LAT...LON 3335 9549 3335 9559 3332 9563 3332 9565
3337 9577 3368 9557 3360 9537
TIME...MOT...LOC 1526Z 025DEG 18KT 3354 9553
CAVANAUGHSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
238 PM CDT WED AUG 5 2009
TXZ095-052000-
LAMAR TX-
238 PM CDT WED AUG 5 2009
...SIGNIFICANT WEATHER ADVISORY FOR...
NORTHERN LAMAR COUNTY
AT 235 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM...14 MILES WEST OF HUGO OR 31 MILES NORTHWEST OF
PARIS...WAS MOVING SOUTH AT 25 MPH. THIS STORM WILL MOVE ACROSS THE
NORTHWEST PORTIONS OF LAMAR COUNTY THROUGH 330 PM.
FREQUENT CLOUD TO GROUND LIGHTNING...VERY HEAVY RAINFALL...PEA-SIZED
HAIL...AND WIND GUSTS TO 50 MPH CAN BE EXPECTED FROM THIS STORM.
IF THIS STORM INTENSIFIES...A SEVERE WEATHER WARNING MAY BE NEEDED.
LAT...LON 3395 9557 3391 9554 3388 9545 3387 9534
3390 9534 3390 9532 3388 9529 3369 9531
3367 9585 3385 9585 3387 9581 3386 9578
3391 9575 3390 9568 3395 9561
TIME...MOT...LOC 1935Z 354DEG 21KT 3401 9574SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
318 PM CDT WED AUG 5 2009
TXZ095-052045-
LAMAR TX-
318 PM CDT WED AUG 5 2009
...SIGNIFICANT WEATHER ADVISORY FOR...
NORTHWESTERN LAMAR COUNTY
AT 317 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 22 MILES WEST OF HUGO...MOVING SOUTHWEST AT 15
MPH. THIS THUNDERSTORM WILL MOVE INTO NORTHEAST FANNIN COUNTY BUT
GUSTY WINDS UP TO 40 MPH ARE POSSIBLE ACROSS WESTERN LAMAR.
WIND GUSTS TO 40 MPH ARE LIKELY WITH THIS STORM.
LAT...LON 3358 9560 3356 9585 3385 9584 3387 9581
3386 9578 3388 9577 3391 9575 3390 9570
3393 9561
TIME...MOT...LOC 2017Z 035DEG 15KT 3389 9586
82/JLDThe Dallas/Ft Worth radar (KFWS), 151 km away, was scanning. The volume nearest the first event began at 21:00 UTC.
13 thunderstorm wind. Local standard time, as filed.
An amateur radio operator estimated a 60 mph wind gust near the Denison Dam.
A storm spotter measured a 71 mph wind gust northwest of Sherman on Plainview Rd.
Trees fell onto many homes in Denison, a parked truck and boat, and onto two carports.
A man was injured on the 1600 block of West Bond when a large tree fell through his home. He suffered minor cuts and bruises.
A storm spotter reported a wind gust of 60 mph 2 miles east-southeast of Callisburg.
The emergency manager reported a wind gust of 58 mph and powerlines down in the city of Gainesville.
A tower at Grayson Community College was blown down onto the Grounds Maintenance Building and the Criminal Justice Building lost most of its roof due to high winds.
An air traffic controller at Grayson County Airport stated the airport had measured a wind gust of 75 mph.
A storm spotter measured a 71 mph wind gust at the intersection of Farm-to-Market Road 1417 and Lamberth Rd.
The automated weather station in Gainesville measured a 64 mph wind gust.
An amatuer radio operator estimated a 70 mph wind gust and vehicles being blown off the roadways.
An amateur radio operator reported several power poles were leaning and multiple power flashes in the city of Sherman.
An amateur radio operator estimated a wind gust of 70 mph and reported large tree limbs were down.
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: 190242, 190245, 192751, 192752, 190259, 190261, 190251, 192753, 190254, 190262, 190264, 190267, 190268.