Alert archive / Texas / Red Flag Warnings in 2011
Red Flag Warning 2, NWS Houston/Galveston, TX
NWS Houston/Galveston, TX issued this red flag warning at Feb 28, 2011, 5:36 AM CST for 23 counties in Texas. It took effect at Feb 28, 2011, 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
- Feb 28, 2011, 5:36 AM CST (11:36 UTC)
- In effect from
- Feb 28, 2011, 10:00 AM CST
- Expired
- Feb 28, 2011, 6:00 PM CST
- In force
- 8 hr
- Issued by
- NWS Houston/Galveston, TX
All 23 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, Houston County, TX, Jackson County, TX, Liberty County, TX, Madison County, TX, Matagorda County, TX, Montgomery County, TX, Polk County, TX, San Jacinto County, TX, Trinity 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 11:36 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, 11.6 hours before the alert went out and 242 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
- 590 J/kg
- Mixed-layer CIN
- -114 J/kg
- Mixed-layer LCL
- 513 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 146 m²/s²
- 0-3 km storm-relative helicity
- 148 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 2.2
The text
As transmitted, in the capitals the NWS used until 2016.
793 WWUS84 KHGX 281136 RFWHGX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 536 AM CST MON FEB 28 2011 ...RED FLAG WARNING IN EFFECT FROM 10 AM THIS MORNING TO 6 PM CST THIS EVENING... .A MUCH DRIER AIRMASS WILL BE MOVING INTO SOUTHEAST TEXAS TODAY IN THE WAKE OF THE OVERNIGHT COLD FRONT. THE COMBINATION OF ABUNDANT SUNSHINE...WARM TEMPERATURES...LOW HUMIDITIES...AND GUSTY NORTHWEST WINDS HAS RESULTED IN THE ISSUANCE OF THE RED FLAG WARNING OVER SOUTHEAST TEXAS TODAY. TXZ163-164-176>179-195>200-210>214-226-227-235>238-281945- /O.UPG.KHGX.FW.A.0001.110228T1600Z-110301T0000Z/ /O.NEW.KHGX.FW.W.0002.110228T1600Z-110301T0000Z/ 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- 536 AM CST MON FEB 28 2011 ...RED FLAG WARNING IN EFFECT FROM 10 AM THIS MORNING TO 6 PM CST THIS EVENING... THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 10 AM THIS MORNING TO 6 PM CST THIS EVENING. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. THE COMBINATION OF ABUNDANT SUNSHINE...WARM TEMPERATURES...LOW HUMIDITIES...AND GUSTY NORTHWEST WINDS ALONG WITH VERY LOW FUEL MOISTURE LEVELS WILL RESULT IN AN ELEVATED FIRE DANGER TODAY. A COLD FRONT THAT MOVED ACROSS THE AREA OVERNIGHT HAS USHERED IN A MUCH DRIER AIRMASS. HUMIDITY LEVELS ARE EXPECTED TO DROP BELOW 30 PERCENT BETWEEN 10 AND 11 AM AND BOTTOM OUT IN THE 15 TO 25 PERCENT RANGE THIS AFTERNOON. NORTHWEST WINDS OF 10 TO 20 MPH ARE EXPECTED WITH GUSTS AROUND 25 MPH AT TIMES. HUMIDITY VALUES WILL RECOVER ABOVE 30 PERCENT AND WINDS WILL DIMINISH AROUND SUNSET. && PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$
1 follow-up statement
154 WWUS84 KHGX 282225 RFWHGX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE HOUSTON/GALVESTON TX 425 PM CST MON FEB 28 2011 ...RED FLAG WARNING IN EFFECT FOR THE SOUTHERN HALF OF SOUTHEAST TEXAS UNTIL 6 PM CST... .THE COMBINATION OF ABUNDANT SUNSHINE...WARM TEMPERATURES...LOW HUMIDITIES...AND GUSTY NORTHWEST WINDS HAS RESULTED IN THE CONTINUATION OF THE RED FLAG WARNING FOR THE SOUTHERN HALF OF SOUTHEAST TEXAS THIS AFTERNOON. TXZ163-164-176>179-195>199-210>212-282330- /O.CAN.KHGX.FW.W.0002.000000T0000Z-110301T0000Z/ AUSTIN-BRAZOS-BURLESON-COLORADO-GRIMES-HOUSTON-MADISON-MONTGOMERY- POLK-SAN JACINTO-TRINITY-WALKER-WALLER-WASHINGTON- 425 PM CST MON FEB 28 2011 ...RED FLAG WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN HOUSTON/GALVESTON HAS CANCELLED THE RED FLAG WARNING. COOLER TEMPERATURES HAVE SPREAD INTO THE AREA THIS AFTERNOON ALLOWING HUMIDITY LEVELS TO RECOVER ABOVE 30 PERCENT. AS A RESULT...THE RED FLAG WARNING HAS BEEN CANCELLED. $$ TXZ200-213-214-226-227-235>238-010000- /O.CON.KHGX.FW.W.0002.000000T0000Z-110301T0000Z/ BRAZORIA-CHAMBERS-FORT BEND-GALVESTON-HARRIS-JACKSON-LIBERTY- MATAGORDA-WHARTON- 425 PM CST MON FEB 28 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING... A RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM CST THIS EVENING. THE COMBINATION OF ABUNDANT SUNSHINE...WARM TEMPERATURES...LOW HUMIDITIES...AND GUSTY NORTHWEST WINDS ALONG WITH VERY LOW FUEL MOISTURE LEVELS IS RESULTING IN A HIGH FIRE DANGER. HUMIDITY LEVELS ARE CURRENTLY RUNNING IN THE 15 TO 25 PERCENT RANGE. NORTHWEST WINDS OF 10 TO 20 MPH ARE EXPECTED WITH GUSTS AROUND 25 MPH AT TIMES. HUMIDITY VALUES WILL RECOVER ABOVE 30 PERCENT AND WINDS WILL DIMINISH AROUND SUNSET. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. && $$
Nearby
Red Flag Warnings in Texas, 2011Every red flag warning in 2011
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.