Alert archive / Texas / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 455, NWS Fort Worth, TX
NWS Fort Worth, TX issued this severe thunderstorm warning at Sep 21, 2009, 7:18 PM CDT for 4 counties in Texas. It was in force for 57 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
- Sep 21, 2009, 7:18 PM CDT (00:18 UTC)
- Expired
- Sep 21, 2009, 8:15 PM CDT
- In force
- 57 min
- Issued by
- NWS Fort Worth, TX
- Area
- Storm-based polygon
Counties Hood County, TX, Johnson County, TX, Parker County, TX, Tarrant County, TX
The radar
The Dallas/Ft Worth radar (KFWS), 25 km from the middle of the area, began a volume at 00:21 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 |
|---|---|---|---|
| Sep 21, 4:29 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Fort Worth, TX (KFWD), launched 00:00Z, 0.3 hours before the alert went out and 38 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
- 2664 J/kg
- Mixed-layer CIN
- -12 J/kg
- Mixed-layer LCL
- 1499 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 190 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Sep 21, 5:33 PM CDT, 1 hour 45 minutes earlier.
Area forecast discussion, Sep 21, 5:33 PM CDT, 1 hour 45 minutes before
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</html>Hazardous weather outlook, Sep 21, 3:18 PM CDT, 4 hours before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE FORT WORTH TX 318 PM CDT MON SEP 21 2009 TXZ091>095-100>107-115>123-129>135-141>148-156>162-174-175-221145- 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- 318 PM CDT MON SEP 21 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH TEXAS. .DAY ONE...THIS AFTERNOON AND TONIGHT. THUNDERSTORMS ARE EXPECTED TO DEVELOP NEAR A BOWIE TO BRECKENRIDGE LINE LATE THIS AFTERNOON...AND THEN BECOME MORE NUMEROUS WHILE MOVING SOUTHEAST DURING THE EVENING AND OVERNIGHT HOURS AS A COLD FRONT MOVES THROUGH THE OUTLOOK AREA. ANY STORMS THAT DEVELOP THIS AFTERNOON THROUGH THE OVERNIGHT HOURS WILL BE CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH AND LARGE HAIL. IN ADDITION TO ANY SEVERE WEATHER...HEAVY RAINFALL WILL BE POSSIBLE AS THE FRONT MOVES THROUGH LEADING TO FLASH FLOODING. A FLASH FLOOD WATCH IS IN EFFECT FOR AREAS NORTH AND EAST OF A GAINESVILLE TO MERIDIAN TO ATHENS LINE THROUGH TONIGHT. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY. SHOWERS AND THUNDERSTORMS WILL CONTINUE MAINLY ACROSS THE SOUTHEAST HALF OF NORTH TEXAS INTO TUESDAY. HEAVY RAINFALL WILL BE THE MAIN THREAT DURING THIS TIME. THE CHANCE FOR THUNDERSTORMS WILL CONTINUE FOR ALL OF NORTH TEXAS THURSDAY AND FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS LIKELY LATE THIS AFTERNOON AND INTO THE EVENING HOURS FOR AREAS GENERALLY ALONG AND NORTH OF INTERSTATE 20. SPOTTER ACTIVATION MAY BE NEEDED ACROSS ALL OF NORTH TEXAS DURING THE OVERNIGHT HOURS. CAVANAUGH
In the hours before
Special weather statement, Sep 21, 6:49 PM CDT, 29 minutes before
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</html>Special weather statement, Sep 21, 6:53 PM CDT, 25 minutes before
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</html>Local storm report, Sep 21, 7:05 PM CDT, 13 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 |
|---|---|---|---|---|
| Sep 21, 7:03 PM CDT | Special Weather Statement | FWD | Erath | 27 min |
| Sep 21, 7:15 PM CDT | Special Weather Statement | FWD | Hood | 30 min |
| Sep 21, 7:20 PM CDT | Severe Thunderstorm Warning | FWD | Comanche, Erath | 70 min |
| Sep 21, 7:38 PM CDT | Special Weather Statement | FWD | Palo Pinto | 37 min |
| Sep 21, 8:05 PM CDT | Areal Flood Advisory | FWD | Johnson, Tarrant | 3 hr |
| Sep 21, 8:09 PM CDT | Special Weather Statement | FWD | Hill | 36 min |
| Sep 21, 8:12 PM CDT | Special Weather Statement | FWD | Dallas | 33 min |
| Sep 21, 8:16 PM CDT | Severe Thunderstorm Warning | FWD | Dallas, Ellis, Johnson, Tarrant | 59 min |
| Sep 21, 8:23 PM CDT | Areal Flood Advisory | FWD | Erath | 3 hr |
| Sep 21, 8:24 PM CDT | Special Weather Statement | FWD | Collin | 36 min |
| Sep 21, 8:28 PM CDT | Severe Thunderstorm Warning | FWD | Erath | 62 min |
| Sep 21, 8:29 PM CDT | Special Weather Statement | FWD | Mills | 31 min |
| Sep 21, 8:33 PM CDT | Areal Flood Advisory | FWD | Hood, Somervell | 2 hr |
| Sep 21, 8:54 PM CDT | Severe Thunderstorm Warning | FWD | Hamilton, Mills | 66 min |
| Sep 21, 8:55 PM CDT | Flash Flood Warning | FWD | Johnson | 3 hr |
| Sep 21, 8:56 PM CDT | Special Weather Statement | FWD | Dallas, Rockwall | 34 min |
| Sep 21, 8:59 PM CDT | Areal Flood Advisory | FWD | Dallas, Ellis | 2 hr |
| Sep 21, 8:59 PM CDT | Flash Flood Warning | FWD | Erath | 3 hr |
| Sep 21, 9:03 PM CDT | Special Weather Statement | FWD | Hill | 27 min |
| Sep 21, 9:13 PM CDT | Severe Thunderstorm Warning | FWD | Bosque, Hamilton | 62 min |
| Sep 21, 9:15 PM CDT | Special Weather Statement | FWD | Ellis, Hill, Kaufman, Rockwall | 30 min |
| Sep 21, 9:21 PM CDT | Severe Thunderstorm Warning | FWD | Ellis, Hill, Johnson, Navarro | 54 min |
| Sep 21, 9:34 PM CDT | Areal Flood Advisory | FWD | Bosque, Hill | 3 hr |
| Sep 21, 9:53 PM CDT | Severe Thunderstorm Warning | FWD | Bosque, Coryell, Hamilton, McLennan | 67 min |
| Sep 21, 9:59 PM CDT | Special Weather Statement | FWD | Henderson, Kaufman, Rains, Van Zandt | 31 min |
| Sep 21, 10:02 PM CDT | Special Weather Statement | FWD | Lampasas | 28 min |
| Sep 21, 10:20 PM CDT | Special Weather Statement | FWD | Hill, McLennan | 25 min |
| Sep 21, 10:27 PM CDT | Special Weather Statement | FWD | Fannin, Lamar | 33 min |
| Sep 21, 10:32 PM CDT | Areal Flood Advisory | FWD | Mills | 3 hr |
| Sep 21, 11:12 PM CDT | Special Weather Statement | FWD | Lamar | 33 min |
| Sep 22, 12:10 AM CDT | Areal Flood Advisory | FWD | Coryell, Lampasas | 2 hr |
| Sep 22, 1:08 AM CDT | Special Weather Statement | FWD | Bell | 37 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.