Alert archive / Texas / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 425, NWS Fort Worth, TX
NWS Fort Worth, TX issued this severe thunderstorm warning at Aug 21, 2009, 2:55 AM CDT for Hopkins County, Hunt County, Rains County, Texas. It was in force for 36 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 21, 2009, 2:55 AM CDT (07:55 UTC)
- Expired
- Aug 21, 2009, 3:31 AM CDT
- In force
- 36 min
- Issued by
- NWS Fort Worth, TX
- Area
- Storm-based polygon
Counties Hopkins County, TX, Hunt County, TX, Rains County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 149 km from the middle of the area, began a volume at 07:55 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 20, 9:57 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 7.9 hours before the alert went out and 140 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 2085 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 2065 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- 44 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.6
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Aug 21, 1:27 AM CDT, 1 hour 28 minutes earlier.
Area forecast discussion, Aug 21, 1:27 AM CDT, 1 hour 28 minutes before
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</html>Hazardous weather outlook, Aug 20, 8:38 PM CDT, 6 hours 17 minutes before
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/
In the hours before
Special weather statement, Aug 20, 10:29 PM CDT, 4 hours 26 minutes before
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
DUNNSpecial weather statement, Aug 20, 11:48 PM CDT, 3 hours 7 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE FORT WORTH TX
1148 PM CDT THU AUG 20 2009
TXZ094-095-106-210515-
LAMAR TX-FANNIN TX-DELTA TX-
1148 PM CDT THU AUG 20 2009
...SIGNIFICANT WEATHER ADVISORY FOR...
FANNIN COUNTY
DELTA COUNTY
LAMAR COUNTY
AT 1147 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
CLUSTER OF STRONG THUNDERSTORMS EXTENDING FROM NEAR HONEY GROVE
ACROSS SOUTHERN LAMAR COUNTY AND INTO DELTA COUNTY.
THESE STORMS WILL PRODUCE VERY HEAVY RAINFALL...NEARLY CONTINUOUS
LIGHTNING AND GUSTY WINDS. FLOODING OF LOW LYING AREAS WILL BE
POSSIBLE. A FLASH FLOOD WARNING IS IN EFFECT FOR LAMAR COUNTY.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT FRIDAY
MORNING FOR NORTHEASTERN TEXAS.
LAT...LON 3386 9545 3388 9530 3337 9531 3335 9559
3323 9585 3341 9586 3335 9637 3373 9637
3370 9631 3377 9628 3376 9619 3382 9614
3382 9618 3383 9617 3389 9595 3385 9577
3390 9575 3395 9561
TIME...MOT...LOC 0447Z 326DEG 14KT 3354 9581
DUNNLocal storm report, Aug 20, 11:57 PM CDT, 2 hours 58 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE FORT WORTH TX
1157 PM CDT THU AUG 20 2009
..TIME.. ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE.. ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1130 PM FLASH FLOOD PARIS 33.67N 95.55W
08/20/2009 LAMAR TX LAW ENFORCEMENT
URBAN FLOODING OF STREETS IN PARISLocal storm report, Aug 21, 1:06 AM CDT, 1 hour 49 minutes before
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</html>Special weather statement, Aug 21, 2:36 AM CDT, 19 minutes before
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</html>The office that day
Everything else NWS Fort Worth, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 9:34 PM CDT | Severe Thunderstorm Warning | FWD | Lamar | 41 min |
| Aug 20, 10:29 PM CDT | Special Weather Statement | FWD | Lamar | 31 min |
| Aug 20, 10:37 PM CDT | Areal Flood Advisory | FWD | Lamar | 113 min |
| Aug 20, 10:49 PM CDT | Severe Thunderstorm Warning | FWD | Lamar | 56 min |
| Aug 20, 10:51 PM CDT | Flash Flood Warning | FWD | Lamar | 114 min |
| Aug 20, 11:35 PM CDT | Areal Flood Advisory | FWD | Fannin | 115 min |
| Aug 20, 11:48 PM CDT | Special Weather Statement | FWD | Delta, Fannin, Lamar | 27 min |
| Aug 21, 12:47 AM CDT | Flash Flood Warning | FWD | Fannin, Lamar | 4 hr |
| Aug 21, 12:57 AM CDT | Severe Thunderstorm Warning | FWD | Fannin | 36 min |
| Aug 21, 2:36 AM CDT | Special Weather Statement | FWD | Dallas | 24 min |
| Aug 21, 3:46 AM CDT | Special Weather Statement | FWD | Van Zandt | 29 min |
| Aug 21, 5:07 AM CDT | Special Weather Statement | FWD | Henderson | 23 min |
| Aug 21, 5:46 AM CDT | Special Weather Statement | FWD | Navarro | 29 min |
| Aug 21, 5:59 AM CDT | Severe Thunderstorm Warning | FWD | Henderson, Navarro | 42 min |
| Aug 21, 6:16 AM CDT | Special Weather Statement | FWD | Ellis | 29 min |
| Aug 21, 6:41 AM CDT | Areal Flood Advisory | FWD | Dallas, Tarrant | 109 min |
| Aug 21, 6:42 AM CDT | Special Weather Statement | FWD | Ellis | 33 min |
| Aug 21, 6:44 AM CDT | Special Weather Statement | FWD | Tarrant | 31 min |
| Aug 21, 6:59 AM CDT | Special Weather Statement | FWD | Navarro | 31 min |
| Aug 21, 7:11 AM CDT | Special Weather Statement | FWD | Dallas | 34 min |
| Aug 21, 7:29 AM CDT | Special Weather Statement | FWD | Navarro | 31 min |
| Aug 21, 7:37 AM CDT | River Flood Warning | FWD | Dallas | 3 hr |
| Aug 21, 8:32 AM CDT | Special Weather Statement | FWD | Palo Pinto | 28 min |
| Aug 21, 8:45 AM CDT | Severe Thunderstorm Warning | FWD | Palo Pinto | 45 min |
| Aug 21, 8:54 AM CDT | Special Weather Statement | FWD | Parker | 36 min |
| Aug 21, 8:58 AM CDT | Severe Thunderstorm Warning | FWD | Hood, Johnson, Parker | 47 min |
| Aug 21, 9:26 AM CDT | Severe Thunderstorm Warning | FWD | Erath, Palo Pinto | 64 min |
| Aug 21, 10:49 AM CDT | Special Weather Statement | FWD | Eastland | 26 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2009Every severe thunderstorm warning in 2009
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.