Alert archive / Alabama / Red Flag Warnings in 2011
Red Flag Warning 8, NWS Birmingham, AL
NWS Birmingham, AL issued this red flag warning at Apr 17, 2011, 3:40 AM CDT for 7 counties in Alabama. It took effect at Apr 17, 2011, 1:00 PM CDT. It was in force for 6 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
- Apr 17, 2011, 3:40 AM CDT (08:40 UTC)
- In effect from
- Apr 17, 2011, 1:00 PM CDT
- Expired
- Apr 17, 2011, 7:00 PM CDT
- In force
- 6 hr
- Issued by
- NWS Birmingham, AL
Counties Barbour County, AL, Bullock County, AL, Lee County, AL, Macon County, AL, Montgomery County, AL, Pike County, AL, Russell County, AL
The nearest sounding before it
Birmingham, AL (KBMX), launched 00:00Z, 8.7 hours before the alert went out and 154 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1865 m above ground
- 0-6 km bulk shear
- 59 kt
- 0-1 km storm-relative helicity
- 79 m²/s²
- 0-3 km storm-relative helicity
- 95 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
692 WWUS84 KBMX 170840 RFWBMX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE BIRMINGHAM AL 340 AM CDT SUN APR 17 2011 ...DRY CONDITIONS EXPECTED THIS AFTERNOON... .DRY CONDITIONS ARE EXPECTED THIS AFTERNOON ACROSS MUCH OF CENTRAL ALABAMA. WITH TEMPERATURES IN THE LOW TO MID 70S AND FAIRLY LOW DEWPOINTS...RH VALUES ARE EXPECTED TO FALL BELOW 25 PERCENT THIS AFTERNOON FOR PORTIONS OF CENTRAL ALABAMA. AREAS MOST LIKELY TO SEE THE SUB 25 PERCENT RH VALUES WILL BE IN THE COUNTIES ALONG AND SOUTH OF THE I-85 CORRIDOR THIS AFTERNOON. ALTHOUGH MOST OF CENTRAL ALABAMA WILL SEE RH VALUES AT OR BELOW 25 PERCENT FOR AT LEAST ONE HOUR...SO WILL NEED TO MONITOR FOR ANY ADDITIONAL COUNTIES THIS AFTERNOON ESPECIALLY ACROSS THE SOUTH. ALZ044>050-171645- /O.NEW.KBMX.FW.W.0008.110417T1800Z-110418T0000Z/ MONTGOMERY-MACON-BULLOCK-LEE-RUSSELL-PIKE-BARBOUR- 340 AM CDT SUN APR 17 2011 ...RED FLAG WARNING IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM CDT THIS EVENING... THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 1 PM THIS AFTERNOON TO 7 PM CDT THIS EVENING. RELATIVE HUMIDITIES MAY DROP BELOW 25 PERCENT IN SEVERAL SPOTS...GENERALLY ALONG AND SOUTH OF A LINE FROM AUBURN TO MONTGOMERY...THIS AFTERNOON. LOOK FOR THESE RH VALUES TO REMAIN BELOW 25 FOR AT LEAST 4 HOURS. OTHER AREAS ADJACENT TO THE WARNING MAY SEE RH VALUES BELOW 25 PERCENT...BUT THE DURATION SHOULD BE LESS THAN 4 HOURS. OUTDORR BURNING IS HIGHLY DISCOURAGED. 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. FOR ADDITIONAL INFORMATION ON THE FIRE CONDITIONS...PLEASE CONTACT THE ALABAMA FORESTRY COMMISSION AT WWW.FORESTRY.ALABAMA.GOV. && $$
1 follow-up statement
922 WWUS84 KBMX 171649 RFWBMX URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE BIRMINGHAM AL 1149 AM CDT SUN APR 17 2011 ...DRY CONDITIONS EXPECTED THIS AFTERNOON... .DRY CONDITIONS ARE EXPECTED THIS AFTERNOON ACROSS MUCH OF CENTRAL ALABAMA. WITH TEMPERATURES IN THE LOW TO MID 70S AND FAIRLY LOW DEWPOINTS...RH VALUES ARE EXPECTED TO FALL BELOW 25 PERCENT THIS AFTERNOON FOR PORTIONS OF CENTRAL ALABAMA. AREAS MOST LIKELY TO SEE THE SUB 25 PERCENT RH VALUES WILL BE IN THE COUNTIES ALONG AND SOUTH OF THE I-85 CORRIDOR THIS AFTERNOON. ALTHOUGH MOST OF CENTRAL ALABAMA WILL SEE RH VALUES AT OR BELOW 25 PERCENT FOR AT LEAST ONE HOUR...SO WILL NEED TO MONITOR FOR ANY ADDITIONAL COUNTIES THIS AFTERNOON ESPECIALLY ACROSS THE SOUTH. ALZ044>050-180000- /O.CON.KBMX.FW.W.0008.110417T1800Z-110418T0000Z/ MONTGOMERY-MACON-BULLOCK-LEE-RUSSELL-PIKE-BARBOUR- 1149 AM CDT SUN APR 17 2011 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... A RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING. RELATIVE HUMIDITIES MAY DROP BELOW 25 PERCENT IN SEVERAL SPOTS... GENERALLY ALONG AND SOUTH OF A LINE FROM AUBURN TO MONTGOMERY... THIS AFTERNOON. LOOK FOR THESE RH VALUES TO REMAIN BELOW 25 FOR AT LEAST 4 HOURS. OTHER AREAS ADJACENT TO THE WARNING MAY SEE RH VALUES BELOW 25 PERCENT...BUT THE DURATION SHOULD BE LESS THAN 4 HOURS. OUTDOOR BURNING IS HIGHLY DISCOURAGED. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING NOW...OR WILL SHORTLY. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXPLOSIVE FIRE GROWTH POTENTIAL. FOR ADDITIONAL INFORMATION ON THE FIRE CONDITIONS...PLEASE CONTACT THE ALABAMA FORESTRY COMMISSION AT WWW.FORESTRY.ALABAMA.GOV. && $$
Nearby
Red Flag Warnings in Alabama, 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.