Alert archive / Alabama / Red Flag Warnings in 2009

Red Flag Warning 22, NWS Mobile, AL

February 21, 2009Butler County, Covington County, Crenshaw County, Alabama

NWS Mobile, AL issued this red flag warning at Feb 21, 2009, 12:51 PM CST for Butler County, Covington County, Crenshaw County, Alabama. 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
Feb 21, 2009, 12:51 PM CST (18:51 UTC)
Expired
Feb 21, 2009, 4:00 PM CST
In force
3 hr
Issued by
NWS Mobile, AL

Counties Butler County, AL, Covington County, AL, Crenshaw County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 6.9 hours before the alert went out and 180 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, Birmingham, AL at 12:00Z on 2009-02-21Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2009-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 77 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
2437 m above ground
0-6 km bulk shear
54 kt
0-1 km storm-relative helicity
77 m²/s²
0-3 km storm-relative helicity
58 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 KMOB 211851
RFWMOB

RED FLAG WARNING
NATIONAL WEATHER SERVICE MOBILE AL
1251 PM CST SAT FEB 21 2009

...RED FLAG WARNING IN EFFECT UNTIL 400 PM CST THIS AFTERNOON
FOR PORTIONS OF THE WESTERN FLORIDA PANHANDLE AND SOUTH CENTRAL
ALABAMA DUE TO THE LIKELIHOOD OF AT LEAST FOUR HOURS OF CRITICALLY
LOW RELATIVE HUMIDITY VALUES...

.DISCUSSION...ANOTHER VERY DRY DAY ACROSS PORTIONS OF THE WESTERN
FLORIDA PANHANDLE AND SOUTH CENTRAL ALABAMA...WITH HUMIDITY VALUES
DROPPING BELOW RED FLAG WARNING CRITERIA.

ALZ057-058-060-FLZ003-005-006-212200-
/O.NEW.KMOB.FW.W.0022.090221T1851Z-090221T2200Z/
BUTLER-CRENSHAW-COVINGTON-INLAND SANTA ROSA-INLAND OKALOOSA-
COASTAL OKALOOSA-
1251 PM CST SAT FEB 21 2009

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

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

A RED FLAG WARNING MEANS THAT DANGEROUS FIRE WEATHER CONDITIONS ARE
EITHER OCCURRING NOW...OR LIKELY WILL OCCUR. A COMBINATION OF LOW
RELATIVE HUMIDITY AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE
GROWTH POTENTIAL.

$$

The office that day

Everything else NWS Mobile, AL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 21, 1:54 PM CSTSmall Craft AdvisoryMOB40 hr

Nearby

Red Flag Warnings in Alabama, 2009Red Flag Warnings in Florida, 2009Every red flag 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.