Alert archive / Texas / Red Flag Warnings in 2007

Red Flag Warning 7, NWS Austin/San Antonio, TX

March 4, 200715 counties in Texas

NWS Austin/San Antonio, TX issued this red flag warning at Mar 4, 2007, 11:49 AM CST for 15 counties in Texas. It took effect at Mar 4, 2007, 12:00 PM CST. It was in force for 3 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
Mar 4, 2007, 11:49 AM CST (17:49 UTC)
In effect from
Mar 4, 2007, 12:00 PM CST
Expired
Mar 4, 2007, 3:24 PM CST
In force
3 hr
Issued by
NWS Austin/San Antonio, TX

Counties Bastrop County, TX, Bexar County, TX, Caldwell County, TX, Comal County, TX, DeWitt County, TX, Fayette County, TX, Gonzales County, TX, Guadalupe County, TX, Hays County, TX, Karnes County, TX, Lavaca County, TX, Lee County, TX, Travis County, TX, Williamson County, TX, Wilson County, TX

The radar

The Austin/San Antonio radar (KEWX), 37 km from the middle of the area, began a volume at 17:54 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

Corpus Christi, TX (KCRP), launched 12:00Z, 5.8 hours before the alert went out and 225 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.

Skew-T log-pSkew-T log-p diagram, Corpus Christi, TX at 12:00Z on 2007-03-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Corpus Christi, TX at 12:00Z on 2007-03-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -260 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
3037 m above ground
0-6 km bulk shear
76 kt
0-1 km storm-relative helicity
-260 m²/s²
0-3 km storm-relative helicity
-162 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WWUS84 KEWX 041749
RFWEWX

RED FLAG WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
1149 AM CST SUN MAR 4 2007

...A RED FLAG WARNING IS IN EFFECT UNTIL 4 PM CST THIS AFTERNOON
FOR EASTERN AREAS OF SOUTH CENTRAL TEXAS...

.THE COMBINATION OF VERY LOW RELATIVE HUMIDITIES AND GUSTY
NORTHERLY WINDS WILL CREATE CRITICAL FIRE WEATHER CONDITIONS
THROUGH MID AFTERNOON.

TXZ173-191>194-205>209-221>225-042200-
/O.NEW.KEWX.FW.W.0007.070304T1800Z-070304T2200Z/
WILLIAMSON-HAYS-TRAVIS-BASTROP-LEE-BEXAR-COMAL-GUADALUPE-CALDWELL-
FAYETTE-WILSON-KARNES-GONZALES-DE WITT-LAVACA-
1149 AM CST SUN MAR 4 2007

...RED FLAG WARNING IN EFFECT UNTIL 4 PM CST THIS AFTERNOON...

THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS ISSUED A
RED FLAG WARNING...WHICH IS IN EFFECT UNTIL 4 PM CST THIS
AFTERNOON. 

RELATIVE HUMIDITIES WILL CONTINUE IN THE 10 TO 20 PERCENT THIS
AFTERNOON. NORTHERLY WINDS OF 10 TO 20 MPH WITH GUSTS TO 25 MPH
CAN BE EXPECTED THROUGH THE MID AFTERNOON HOURS. THIS WILL CREATE
CRITICAL FIRE WEATHER CONDITIONS. 

WINDS WILL DECREASE BY LATE AFTERNOON ENDING THE CRITICAL FIRE
WEATHER THREAT. 

A RED FLAG WARNING MEANS WEATHER CONDITIONS WILL PROMOTE FIRES
THAT ARE DIFFICULT TO CONTROL ACROSS THE WARNED AREA. A RED FLAG
WARNING IS COMPLETELY SEPARATE FROM A LOCAL BURN BAN WHICH IS
ISSUED BY LOCAL OFFICIALS.

$$
1 follow-up statement
000 
WWUS84 KEWX 042124
RFWEWX

RED FLAG WARNING
NATIONAL WEATHER SERVICE AUSTIN/SAN ANTONIO TX
324 PM CST SUN MAR 4 2007

...RED FLAG WARNING IS CANCELLED...

.THE RED FLAG WARNING IS CANCELLED DUE TO WINDS BELOW CRITICAL
LEVELS.

TXZ173-191>194-205>209-221>225-042230-
/O.CAN.KEWX.FW.W.0007.000000T0000Z-070304T2200Z/
WILLIAMSON-HAYS-TRAVIS-BASTROP-LEE-BEXAR-COMAL-GUADALUPE-CALDWELL-
FAYETTE-WILSON-KARNES-GONZALES-DE WITT-LAVACA-
324 PM CST SUN MAR 4 2007

...RED FLAG WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN AUSTIN/SAN ANTONIO HAS CANCELLED
THE RED FLAG WARNING. 

SUSTAINED WINDS HAVE FALLEN BELOW THE CRITICAL LEVEL OF 15 MPH.
THERE COULD BE SOME ISOLATED GUSTS OF 15 TO 20 MPH THE REMAINDER
OF THE AFTERNOON.

$$

Nearby

Red Flag Warnings in Texas, 2007Every red flag warning in 2007

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.