Alert archive / Texas / Red Flag Warnings in 2010
Red Flag Warning 4, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this red flag warning at Nov 30, 2010, 5:47 AM CST for 18 counties in Texas. It took effect at Nov 30, 2010, 10:00 AM CST. It was in force for 8 hr. 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 30, 2010, 5:47 AM CST (11:47 UTC)
- In effect from
- Nov 30, 2010, 10:00 AM CST
- Expired
- Nov 30, 2010, 6:00 PM CST
- In force
- 8 hr
- Issued by
- NWS Houston/Galveston, TX
Counties Austin County, TX, Brazoria County, TX, Brazos County, TX, Burleson County, TX, Chambers County, TX, Colorado County, TX, Fort Bend County, TX, Galveston County, TX, Grimes County, TX, Harris County, TX, Jackson County, TX, Madison County, TX, Matagorda County, TX, Montgomery County, TX, Walker County, TX, Waller County, TX, Washington County, TX, Wharton County, TX
The radar
The Houston radar (KHGX), 91 km from the middle of the area, began a volume at 11:47 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, 11.8 hours before the alert went out and 260 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
- 2078 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 526 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 275 m²/s²
- 0-3 km storm-relative helicity
- 303 m²/s²
- Significant tornado parameter
- 3.3
- Supercell composite
- 13.3
What forecasters said that day
The local office's own words before this red flag 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 red flag warning went out at Nov 29, 5:35 PM CST, 12 hours 12 minutes earlier.
Area forecast discussion, Nov 29, 5:35 PM CST, 12 hours 12 minutes before
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</html>Hazardous weather outlook, Nov 29, 6:04 AM CST, 23 hours 43 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 604 AM CST MON NOV 29 2010 TXZ163-164-176>179-195>200-210>214-226-227-235>238-300000- AUSTIN-BRAZORIA-BRAZOS-BURLESON-CHAMBERS-COLORADO-FORT BEND- GALVESTON-GRIMES-HARRIS-HOUSTON-JACKSON-LIBERTY-MADISON-MATAGORDA- MONTGOMERY-POLK-SAN JACINTO-TRINITY-WALKER-WALLER-WASHINGTON- WHARTON- 604 AM CST MON NOV 29 2010 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF SOUTHEAST TEXAS. .DAY ONE...TODAY AND TONIGHT SPC HAS OUTLOOKED AREAS EAST OF A LINE FROM RUSK TO MOSS HILL IN SLIGHT RISK THIS AFTERNOON. A STRONG TEMPERATURE INVERSION WILL LIMIT CONVECTIVE POTENTIAL OVER SOUTHEAST TEXAS AND THE BETTER THREAT FOR STRONG STORMS WILL BE FURTHER EAST OVER LOUISIANA. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY LOW RELATIVE HUMIDITY COUPLED WITH MODERATE NORTHWEST WINDS WILL PRODUCE POTENTIALLY DANGEROUS FIRE WEATHER CONDITIONS. AT THIS TIME...WIND SPEEDS ARE FORECAST TO REMAIN JUST BELOW RED FLAG CRITERIA. IF WIND SPEEDS INCREASE...A FIRE WEATHER WATCH OR RED FLAG WARNING MAY BE REQUIRED FOR AREAS WEST OF A MADISONVILLE TO SUGARLAND TO SARGENT LINE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED.
The office that day
Everything else NWS Houston/Galveston, TX issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 29, 9:40 PM CST | Fire Weather Watch | HGX | Austin, Brazos, Burleson, Colorado, Fort Bend, Grimes and 8 more | 8 hr |
Nearby
Red Flag Warnings in Texas, 2010Every red flag warning in 2010
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.