Alert archive / Texas / Severe Thunderstorm Warnings in 2009
Severe Thunderstorm Warning 4, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Feb 1, 2009, 11:32 PM CST for Houston County, Texas. It was in force for 43 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 1, 2009, 11:32 PM CST (05:32 UTC)
- Expired
- Feb 2, 2009, 12:15 AM CST
- In force
- 43 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
County Houston County, TX
The radar
The Shreveport radar (KSHV), 195 km from the middle of the area, began a volume at 05:35 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, 5.5 hours before the alert went out and 251 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
- 329 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 672 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 102 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.6
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 Houston/Galveston, TX wrote its last area forecast discussion before this severe thunderstorm warning went out at Feb 1, 11:22 PM CST, 10 minutes earlier.
Area forecast discussion, Feb 1, 11:22 PM CST, 10 minutes before
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HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 753 PM CST SUN FEB 1 2009 GMZ330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214-226- 227-235>238-021400- 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- WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL 20 NM TO 60 NM- WATERS FROM FREEPORT TO THE MATAGORDA SHIP CHANNEL OUT 20 NM- WATERS FROM HIGH ISLAND TO FREEPORT 20 TO 60 NM- WATERS FROM HIGH ISLAND TO FREEPORT OUT 20 NM-WHARTON- 753 PM CST SUN FEB 1 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TONIGHT A LINE OF SHOWERS AND EMBEDDED THUNDERSTORMS IS EXPECTED TO DEVELOP ALONG A COLD FRONT AS IT PUSHES INTO NORTHERN PARTS OF SOUTHEAST TEXAS AROUND MIDNIGHT AND OFF THE COAST AROUND SUNRISE MONDAY. SOME OF THE STORMS COULD BRIEFLY PULSE UP TO STRONG TO SEVERE LEVELS WITH HAIL AND STRONG WINDS THE PRIMARY THREAT. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY THE COLD FRONT SHOULD BE PUSHING OFF THE COAST DURING THE MORNING HOURS MONDAY. SOME OF THE STORMS COULD BE STRONG. MARINERS SHOULD BE PREPARED FOR WINDS TO SHIFT TO THE NORTH AND INCREASE IN SPEED. A SMALL CRAFT ADVISORY WILL BE IN EFFECT. OTHERWISE...A DRY AIRMASS WILL BE FILTERING IN BEHIND THE FRONT. DRY AND BREEZY CONDITIONS WILL SET THE STAGE FOR HAZARDOUS BURNING CONDITIONS. A RED FLAG WARNING HAS BEEN ISSUED FOR MONDAY. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS POSSIBLE LATER TONIGHT.
In the hours before
Local storm report, Feb 1, 5:46 PM CST, 5 hours 46 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 1, 10:29 PM CST | Severe Thunderstorm Warning | HGX | Houston | 61 min |
| Feb 1, 11:55 PM CST | Dense Fog Advisory | HGX | Brazoria, Fort Bend, Galveston, Jackson, Matagorda, Wharton | 3 hr |
| Feb 2, 12:12 AM CST | Severe Thunderstorm Warning | HGX | Grimes, San Jacinto, Walker | 63 min |
| Feb 2, 1:04 AM CST | Severe Thunderstorm Warning | HGX | Montgomery, San Jacinto, Walker | 56 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.