Thunderstorms that formed along a frontal boundary produced flash flooding in Lamar County and several instances of wind damage across North Texas.
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 that formed along a frontal boundary produced flash flooding in Lamar County and several instances of wind damage across North Texas.
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 20, 10:02 PM CST, 13 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE FORT WORTH TX 1102 PM CDT THU AUG 20 2009 .UPDATE... WATCH FOR NE THIRD OF NORTH TX(NOT INCLUDING IMMEDIATE DALLAS/FORT WORTH AREA) CONTINUES UNTIL 4 AM. HAVE RAISED POPS INCREMENTALLY ACROSS THE NE COUNTIES TO HIGH CHANCE/LIKELY DURING THE OVERNIGHT...DUE TO SOME BACKBUILDING AND SLOW SSE PROPAGATION OF STORMS. OTHERWISE...JUST ADJUSTED SOME TRENDS A BIT. 05/ && .AVIATION... /00Z TAFS/ SIGNIFICANT CONVERGENCE CONTINUES ALONG THE REMNANT OUTFLOW BOUNDARY NOW SERVING AS A PREFRONTAL TROUGH. ATTEMPTS AT CONVECTIVE INITIATION WEST OF I-35 HAVE BEEN MOSTLY FRUITLESS AS TOWERS ENCOUNTER WARM/DRY AIR AND WEAK FLOW ALOFT. WHERE MOISTURE IS HEALTHIER AT 850/700MB...NE TEXAS/SE OKLAHOMA...DEVELOPMENT HAS NOW BEGUN IN EARNEST. BEST PRECIP CHANCES WILL REMAIN EAST OF TAF SITES...AND WILL MAINTAIN ONLY A BRIEF 3-HR WINDOW OF CB AT METRO TAF SITES. ALTHOUGH 850MB WINDS WILL BE PALTRY OVERNIGHT...SOME INDICATION OF MOIST ADVECTION AT 700MB SUFFICIENT TO REDUCE INVERSION...ALBEIT ABOVE A BOUNDARY LAYER WHOSE INSTABILITY WILL BE DIMINISHING AFTER DARK. WACO MAY HAVE SOMEWHAT BETTER CHANCE THAN METROPLEX TO SEE THE REALIZATION OF THIS POTENTIAL...AND WILL MAINTAIN VCTS THERE. NEXT FEW HOURS WILL TELL THE TALE. WILL WATCH MESOSCALE TRENDS CLOSELY THIS EVENING AS EVENT HAS JUST BEGUN. 25 && .PREV UPDATE... .UPDATE... NEW SEVERE STORM WATCH 725 HAS BEEN ISSUED FOR GENERALLY THE SAME AREAS AS IN WATCH 722...THOUGH WITH THE ADDITION OF ROCKWALL... KAUFAM...AND VAN ZANDT COUNTIES IN CASE COOL POOL FROM NE TX MCS GENERATES ANYTHING BY MIDNIGHT/AFTER. NEW WATCH GOES THROUGH 4 AM. IT REMAINS TO BE SEEN IF WRN FLANK OF ACTIVITY BACK TO I-35 CORRIDOR NEAR RED RIVER VALLEY CAN GET ITS ACT TOGETHER...YET MODELS TEND TO INDICATE BEST SEVERE POTENTIAL TO BE OVER ARK-LA-TX INTO NW LA/SRN AR THROUGH THE NIGHT. WELL CONTINUE TO MONITOR THROUGH THE NIGHT. NEW UPDATES SENT. 05 && .PREV DISCUSSION... /ISSUED 330 PM CDT THU AUG 20 2009/ TOWERING CU HAS DEVELOPED ALONG THE OLD OUTFLOW BOUNDARY EXTENDING FROM YOUNG COUNTY EASTWARD INTO LAMAR COUNTY. EXPECT THESE CU TO CONTINUE TO DEVELOP IN THE VERY UNSTABLE ENVIRONMENT. CAPE VALUES EXCEED 3000 J/KG AND SHEAR VALUES HAVE ACTUALLY IMPROVED TO 30 KNOTS ALONG THE RED RIVER. SEVERE STORM WATCH HAS BEEN ISSUED UNTIL 03Z OR 10 PM FOR AREAS NORTH OF A YOUNG TO DENTON TO HOPKINS/RAINS COUNTY LINE. EXPECTING LARGE HAIL AND DAMAGING WINDS TO BE THE MAIN THREATS FOR SEVERE WEATHER. STORMS SHOULD CONTINUE TO SLOWLY SAG SOUTHWARD AS THE FRONT/BOUNDARY CONTINUE TO PROGRESS SOUTH THROUGH THE EVENING HOURS. FRONT WILL LOSE ITS STEAM OVER NIGHT AND STALL OUT SOMEWHERE AROUND CENTRAL TEXAS. POPS WILL CONTINUE ALONG THE FRONTAL BOUNDARY BUT SEVERE POTENTIAL SHOULD DIMINISH AS THE NIGHT PROGRESSES AS AIRMASS BECOMES MORE STABLE. DRIER AIR WILL FILTER IN BEHIND THE FRONT WITH DEW POINTS UNDER 60 TOMORROW AFTERNOON FOR AREAS GENERALLY NORTH OF INTERSTATE 20. THIS WILL BRING COOLER NIGHTS AND LESS HUMIDITY THROUGH THE WEEKEND. INTERESTING SYNOPTIC PATTERN SHAPING UP FOR NEXT WEEK. MONDAY...A DOMINANT RIDGE WILL BE CENTERED OVER THE TEXAS PANHANDLE WITH DEEP TROUGHS ON EITHER SIDE. THE WESTERN TROUGH NUDGES THE HIGH EAST WHICH CAUSES THE EASTERN TROUGH TO CUT OFF UNDERNEATH THE RIDGE. STILL ALOT OF UNCERTAINTY WITH THIS SCENARIO WITH THE 12Z GFS BRINGING THE LOW INTO TEXAS AND THE ECMWF KEEPING IT OVER FLORIDA...SO WILL KEEP 10 POPS FOR THE EXTENDED. 85/NH && .PRELIMINARY POINT TEMPS/POPS... DALLAS-FT. WORTH, TX 73 96 73 95 73 / 40 10 10 5 10 WACO, TX 77 100 73 101 75 / 20 10 10 5 10 PARIS, TX 68 92 65 90 63 / 70 5 10 5 5 DENTON, TX 71 95 67 94 68 / 30 5 10 5 5 MCKINNEY, TX 70 94 66 95 66 / 50 10 10 5 5 DALLAS, TX 75 96 73 96 74 / 40 10 10 5 10 TERRELL, TX 73 96 69 96 68 / 50 10 10 5 5 CORSICANA, TX 74 96 71 96 71 / 30 20 10 5 10 TEMPLE, TX 76 99 72 100 72 / 10 10 10 5 10 && .FWD WATCHES/WARNINGS/ADVISORIES... NONE. && 21/05
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE FORT WORTH TX 838 PM CDT THU AUG 20 2009 TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-211200- 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- 838 PM CDT THU AUG 20 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS. .DAY ONE...TONIGHT. THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS EAST OF A SHERMAN... DALLAS...HILLSBORO...FAIRFIELD AND PALESTINE LINE OVERNIGHT. DAMAGING WINDS...LARGE HAIL...BRIEF HEAVY RAINFALL...AND POSSIBLY A BRIEF TORNADO WILL BE THE MAIN THREATS...AS SCATTERED STORMS MOVE THROUGH THE SLIGHT RISK AREA. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THUNDERSTORMS REMAIN POSSIBLE FRIDAY SOUTHEAST OF A TEMPLE...CORSICANA... SULPHUR SPRINGS LINE. CLOUD TO GROUND LIGHTNING AND BRIEF HEAVY RAIN MAY ACCOMPANY THE STORMS. .SPOTTER INFORMATION STATEMENT... LIMITED SPOTTER ACTIVATION MAY BE REQUESTED ACROSS EASTERN NORTH TEXAS. 05/
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1029 PM CDT THU AUG 20 2009
TXZ095-210400-
LAMAR TX-
1029 PM CDT THU AUG 20 2009
...SIGNIFICANT WEATHER ADVISORY FOR...
LAMAR COUNTY
AT 1029 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 5 MILES NORTH OF PARIS...MOVING SOUTHEAST AT 15
MPH.
CITIES IN THE PATH OF THIS STORM INCLUDE BLOSSOM...DEPORT AND PARIS.
TORRENTIAL RAINFALL AND WIND GUSTS TO 50 MPH ARE LIKELY WITH THIS STORM.
IF THIS STORM INTENSIFIES...A SEVERE WEATHER WARNING MAY BE NEEDED.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT FRIDAY
MORNING FOR NORTHEASTERN TEXAS.
LAT...LON 3386 9545 3387 9533 3390 9533 3389 9530
3338 9530 3338 9531 3343 9542 3368 9585
3384 9585 3386 9581 3385 9577 3390 9575
3390 9568 3395 9561
TIME...MOT...LOC 0329Z 307DEG 13KT 3373 9557
DUNNThe Dallas/Ft Worth radar (KFWS), 204 km away, was scanning. The volume nearest the first event began at 04:15 UTC.
10 thunderstorm wind, 3 lightning, 1 flash flood, 1 hail. Local standard time, as filed.
Numerous streets were flooded in the city of Paris. One person was rescued when a wrecker removed a stranded vehicle from high waters.
Trees were reported down across southeastern Hopkins County.
Widespread tree damage was reported in Enchanted Oaks. Numerous trees fell on homes, carports, and powerlines. Damage was reported to several structures.
A tree fell on a house but did not cause major damage to the structure.
There were numerous reports of wind damage in the community of Payne Springs. Numerous trees and powerlines were down. There was roof damage to 10 homes due to fallen trees.
The County Commissioner reported about a half dozen trees knocked down onto roadways.
Lightning destroyed a house on the 5000 block of Pinehurst.
Lightning struck two structures and started fires at both places in far eastern Parker County. The first structure was a home on Deer Crossing Way and the second was a church on Reese Lane. The home was destroyed and the church suffered minor damage to the roof.
Lightning struck the Fort Worth Weather Forecast Office and destroyed two computers and damaged Amatuer Radio equipment.
Quarter size hail was reported north of the city of Barry.
Four power poles were snapped in the city of Barry.
Three modular buildings approximately 60'x20' were blown over on North Burleson Blvd.
A roof near Trinity Blvd and I-820 was damaged when a tree fell onto it. Also, a 5 diameter tree limb was thrown 50 feet.
Power poles and large trees were blown down on FM 744 west of Corsicana.
A barn, several outbuildings, and a garage door suffered damage due to high winds.
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: 192684, 193158, 192756, 192686, 192687, 193160, 192758, 192688, 192689, 192693, 192694, 192697, 192698, 192699, 192759.