Alert archive / Texas / Severe Thunderstorm Warnings in 2005
Severe Thunderstorm Warning 12, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Feb 23, 2005, 9:01 PM CST for Harris County, Texas. It was in force for 46 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
- Feb 23, 2005, 9:01 PM CST (03:01 UTC)
- Expired
- Feb 23, 2005, 9:47 PM CST
- In force
- 46 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Counties, with a storm outline in the text
County Harris County, TX
The radar
The Houston radar (KHGX), 52 km from the middle of the area, began a volume at 03:02 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 nearest sounding before it
Lake Charles Mun, LA (KLCH), launched 00:00Z, 3.0 hours before the alert went out and 213 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
- 324 J/kg
- Mixed-layer CIN
- -111 J/kg
- Mixed-layer LCL
- 938 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 222 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 1.0
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 Houston/Galveston, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Feb 23, 8:45 PM CST, 16 minutes earlier.
Area forecast discussion, Feb 23, 8:45 PM CST, 16 minutes before
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HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 320 PM CST WED FEB 23 2005 GMZ330-335-TXZ163-164-176>179-195>200-210>214-226-227-235>238-241300- AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND-GALVESTON- GALVESTON BAY-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-MADISON-MATAGORDA- MATAGORDA BAY-MONTGOMERY-POLK-SAN JACINTO-TRINITY-WALKER-WALLER- WASHINGTON-WHARTON- 320 PM CST WED FEB 23 2005 ...SEVERE STORMS AND LOCALLY HEAVY RAINFALL POSSIBLE ACROSS SOUTHEAST TEXAS TONIGHT... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST TEXAS. .DAY ONE...REST OF THIS AFTERNOON. AFTERNOON HEATING AND A COUPLE OF SURFACE BOUNDARIES HAVE PRODUCE ISOLATED STRONG TO SEVERE THUNDERSTORMS ALONG AND SOUTHEAST OF A LIBERTY TO HOUSTON TO WHARTON LINE. EXPECT THUNDERSTORMS DEVELOPMENT TO CONTINUE INTO THE EVENING HOURS ACROSS THIS AREA. THE MAIN THREATS FROM THESE STORMS WILL BE LOCALLY HEAVY RAINFALL AND LARGE HAIL. .TONIGHT... A BETTER CHANCE OF SEVERE THUNDERSTORMS AND HEAVY RAINFALL EXISTS LATER TONIGHT AS A COLD FRONT PUSHES SOUTH INTO SOUTHEAST TEXAS. A CLUSTER OF STRONG TO SEVERE THUNDERSTORMS IS EXPECTED TO FORM OVER WEST-CENTRAL TEXAS THIS EVENING...THEN MOVE EASTWARD ALONG THE FRONT INTO SOUTHEAST TEXAS AFTER MIDNIGHT. A FEW STORMS COULD BECOME SEVERE WITH LARGE HAIL AND DAMAGING WINDS BEING THE PRIMARY THREATS. LOCALLY HEAVY RAINFALL IS ALSO POSSIBLE WITH THE STORMS TONIGHT. RAINFALL AMOUNTS BY THURSDAY MORNING WILL AVERAGE 1/2 INCH WITH ISOLATED TOTALS OF 2 TO 3 INCHES POSSIBLE. THIS HEAVY RAINFALL THREAT IS EXPECTED TO BE GREATEST ACROSS THE NORTHERN PORTIONS OF SOUTHEAST TEXAS DURING THE OVERNIGHT HOURS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. THURSDAY...THE COLD FRONT WILL MOVE SLOWLY ACROSS SOUTHEAST TEXAS AND OFF THE UPPER TEXAS COAST. NUMEROUS SHOWERS AND THUNDERSTORMS ARE EXPECTED AS THE FRONT INTERACTS WITH THE UNSTABLE AIRMASS IN PLACE. LOCALLY HEAVY RAINFALL WILL AGAIN BE POSSIBLE ON THURSDAY. ADDITIONAL RAINFALL AMOUNTS THURSDAY WILL AVERAGE 1/2 TO 1 INCH WITH ISOLATED TOTALS OF 2 TO 4 INCHES POSSIBLE. THE POTENTIAL FOR SEVERE THUNDERSTORMS ON THURSDAY APPEARS LOW AT THIS TIME. .SPOTTER INFORMATION STATEMENT.... SPOTTER ACTIVATION IS POSSIBLE TONIGHT.
In the hours before
Local storm report, Feb 23, 8:32 PM CST, 29 minutes before
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</html>The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 23, 8:05 PM CST | Severe Thunderstorm Warning | HGX | Waller | 40 min |
| Feb 23, 8:22 PM CST | Severe Thunderstorm Warning | HGX | Harris | 53 min |
| Feb 23, 8:38 PM CST | Severe Thunderstorm Warning | HGX | Harris | 52 min |
| Feb 23, 8:48 PM CST | Severe Thunderstorm Warning | HGX | Waller | 42 min |
| Feb 23, 9:26 PM CST | Special Marine Warning | HGX | 2 hr | |
| Feb 24, 5:07 AM CST | Severe Thunderstorm Warning | HGX | Jackson | 38 min |
| Feb 24, 5:51 AM CST | Special Marine Warning | HGX | 114 min | |
| Feb 24, 6:40 AM CST | Tornado Warning | HGX | Chambers, Fort Bend, Harris | 275 days |
| Feb 24, 7:12 AM CST | Flash Flood Warning | HGX | Fort Bend | 2 hr |
| Feb 24, 7:14 AM CST | Special Marine Warning | HGX | 2 hr | |
| Feb 24, 7:45 AM CST | Special Marine Warning | HGX | 2 hr | |
| Feb 24, 8:33 AM CST | Special Marine Warning | HGX | 87 min | |
| Feb 24, 10:06 AM CST | Special Marine Warning | HGX | 39 min |
Nearby
Severe Thunderstorm Warnings in Texas, 2005Every severe thunderstorm warning in 2005
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.