Alert archive / Texas / Severe Thunderstorm Warnings in 2008
Severe Thunderstorm Warning 154, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this severe thunderstorm warning at Nov 11, 2008, 8:58 PM CST for Colorado County, Texas. It was in force for 47 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
- Nov 11, 2008, 8:58 PM CST (02:58 UTC)
- Expired
- Nov 11, 2008, 9:45 PM CST
- In force
- 47 min
- Issued by
- NWS Houston/Galveston, TX
- Area
- Storm-based polygon
County Colorado County, TX
The radar
The Houston radar (KHGX), 141 km from the middle of the area, began a volume at 02:59 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 325 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
- 278 J/kg
- Mixed-layer CIN
- -11 J/kg
- Mixed-layer LCL
- 894 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 128 m²/s²
- 0-3 km storm-relative helicity
- 150 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 1.2
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 Nov 11, 7:10 PM CST, 1 hour 48 minutes earlier.
Area forecast discussion, Nov 11, 7:10 PM CST, 1 hour 48 minutes before
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</html>Hazardous weather outlook, Nov 11, 3:01 PM CST, 5 hours 57 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 301 PM CST TUE NOV 11 2008 GMZ330-335-350-355-370-375-TXZ163-164-176>179-195>200-210>214-226- 227-235>238-121200- 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- 301 PM CST TUE NOV 11 2008 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. ...LOCALLY HEAVY RAINFALL AND ISOLATED SEVERE THUNDERSTORMS POSSIBLE THROUGH TOMORROW... .DAY ONE...REST OF THIS AFTERNOON AND TONIGHT SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS WILL PERSIST ACROSS PORTIONS OF SOUTHEAST TEXAS AS DEEP GULF MOISTURE CONTINUES TO MOVE ONSHORE AND INTERACTS WITH UPPER LEVEL DISTURBANCES MOVING ACROSS THE AREA FROM THE WEST. THERE IS ALSO A SLIGHT RISK FOR SOME ISOLATED SEVERE THUNDERSTORMS THIS AFTERNOON AND TONIGHT. THE PRIMARY SEVERE WEATHER THREAT WILL BE DAMAGING WINDS AND ISOLATED TORNADOES. MODERATE TO HEAVY RAINS ARE ALSO POSSIBLE GIVEN THE TRAINING MOTION OF THE STORMS AND AVAILABLE TROPICAL MOISTURE. ANOTHER 1 TO 2 INCHES OF RAIN WITH ISOLATED TOTALS UP TO 4 INCHES CAN BE EXPECTED. THESE TOTALS MAY LEAD TO SOME LOCALIZED FLOODING. A FLASH FLOOD WATCH MAY BE NEEDED LATER TODAY OR TONIGHT. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY THUNDERSTORM CHANCES WILL CONTINUE ON WEDNESDAY. THE THREAT OF LOCALLY HEAVY RAINFALL FROM TRAINING CELLS WILL BE A GOOD POSSIBILITY. ADDITIONAL RAINFALL TOTALS OF 2 TO 4 INCHES ARE POSSIBLE...AND THIS MAY LEAD TO SOME LOCALIZED FLOODING IF THEY FALL ACROSS ALREADY SATURATED AREAS. A FLASH FLOOD WATCH MAY BE NEEDED. THERE IS ALSO THE POTENTIAL FOR ISOLATED STRONG TO SEVERE STORMS. PLEASE CONTINUE TO MONITOR THIS OUTLOOK AND FORECASTS FOR UPDATED INFORMATION ABOUT THE HEAVY RAINFALL AND SEVERE WEATHER THREAT. CHANCES OF RAIN SHOULD BEGIN TAPERING OFF ON WEDNESDAY NIGHT AND THURSDAY MORNING AS A WEAK FRONT MOVES OFFSHORE AND DRIER AIR WORKS IN FROM THE NORTH. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED LATER TODAY OR TONIGHT.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 11, 6:32 PM CST | Areal Flood Advisory | HGX | Montgomery, Waller | 118 min |
| Nov 11, 7:30 PM CST | River Flood Warning | HGX | Harris, Montgomery | 24 hr |
| Nov 11, 8:25 PM CST | Areal Flood Advisory | HGX | Montgomery | 2 hr |
| Nov 11, 9:26 PM CST | Tornado Warning | HGX | Grimes, Montgomery, Waller | 49 min |
| Nov 11, 10:02 PM CST | Areal Flood Advisory | HGX | Austin, Colorado, Grimes, Montgomery, Waller, Washington | 3 hr |
| Nov 11, 10:12 PM CST | Flash Flood Warning | HGX | Grimes, Montgomery | 3 hr |
| Nov 11, 11:28 PM CST | Severe Thunderstorm Warning | HGX | Harris, Montgomery | 47 min |
| Nov 11, 11:39 PM CST | Tornado Warning | HGX | Harris | 39 min |
| Nov 11, 11:48 PM CST | Areal Flood Advisory | HGX | Austin, Harris, Montgomery, Waller | 117 min |
| Nov 12, 1:47 AM CST | Areal Flood Advisory | HGX | Chambers, Fort Bend, Harris, Liberty, Wharton | 118 min |
| Nov 12, 1:57 AM CST | Special Marine Warning | HGX | 2 hr | |
| Nov 12, 2:08 AM CST | River Flood Warning | HGX | Harris, Montgomery | 42 hr |
| Nov 12, 3:03 AM CST | Severe Thunderstorm Warning | HGX | Galveston | 27 min |
| Nov 12, 3:38 AM CST | Special Marine Warning | HGX | 52 min | |
| Nov 12, 9:10 AM CST | River Flood Warning | HGX | Montgomery | 23 hr |
| Nov 12, 3:57 PM CST | River Flood Warning | HGX | Harris, Montgomery | 9 hr |
Nearby
Severe Thunderstorm Warnings in Texas, 2008Every severe thunderstorm warning in 2008
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.