Alert archive / Alabama / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 260, NWS Birmingham, AL

August 4, 2010Barbour County, Lee County, Russell County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Aug 4, 2010, 3:35 PM CDT for Barbour County, Lee County, Russell County, Alabama. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 4, 2010, 3:35 PM CDT (20:35 UTC)
Expired
Aug 4, 2010, 4:15 PM CDT
In force
40 min
Issued by
NWS Birmingham, AL
Area
Storm-based polygon

Counties Barbour County, AL, Lee County, AL, Russell County, AL

The nearest sounding before it

Eglin AFB/Valpar, FL (KVPS), launched 12:00Z, 8.6 hours before the alert went out and 227 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, Eglin AFB/Valpar, FL at 12:00Z on 2010-08-04Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1144 joules per kilogram.LCLLFCEL10008507005003002001001 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, Eglin AFB/Valpar, FL at 12:00Z on 2010-08-04The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -17 square meters per square second.1939Sfc1 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
1144 J/kg
Mixed-layer CIN
-14 J/kg
Mixed-layer LCL
878 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-17 m²/s²
0-3 km storm-relative helicity
9 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Birmingham, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 4, 3:20 PM CDT, 15 minutes earlier.

Area forecast discussion, Aug 4, 3:20 PM CDT, 15 minutes before
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Hazardous weather outlook, Aug 4, 1:00 PM CDT, 2 hours 35 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
100 PM CDT WED AUG 4 2010

ALZ011>015-017>050-051200-
AUTAUGA-BARBOUR-BIBB-BLOUNT-BULLOCK-CALHOUN-CHAMBERS-CHEROKEE-
CHILTON-CLAY-CLEBURNE-COOSA-DALLAS-ELMORE-ETOWAH-FAYETTE-GREENE-HALE-
JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-PERRY-
PICKENS-PIKE-RANDOLPH-RUSSELL-SHELBY-ST CLAIR-SUMTER-TALLADEGA-
TALLAPOOSA-TUSCALOOSA-WALKER-WINSTON-
100 PM CDT WED AUG 4 2010

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

AN EXCESSIVE HEAT WARNING REMAINS IN EFFECT FOR ALL OF CENTRAL
ALABAMA. AFTERNOON HIGHS WILL ONCE AGAIN BE IN THE UPPER 90S TO
LOWER 100S...WITH HEAT INDICES OF 108 TO 115 DEGREES. OVERNIGHT
LOWS WILL ONLY FALL INTO THE MID TO UPPER 70S ONCE AGAIN...PROVIDING
LITTLE RELIEF FROM THE HEAT.

STRONG STORMS WILL BE POSSIBLE ACROSS ALL OF CENTRAL ALABAMA
THROUGH 8 PM THIS EVENING. THE MAIN THREAT WILL BE WIND GUSTS UP TO
50 MPH.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY.

AN EXCESSIVE HEAT WARNING REMAINS IN EFFECT THROUGH THURSDAY.
HEAT INDICES OF 108 TO 115 DEGREES WILL BE LIKELY AGAIN ON THURSDAY
AFTERNOON...AND OVERNIGHT LOWS WILL ONLY DROP INTO THE MIDDLE TO
UPPER 70S.

TEMPERATURES ARE EXPECTED TO BE A COUPLE OF DEGREES COOLER ON
FRIDAY...BUT STILL HOT...SO A HEAT ADVISORY HAS BEEN ISSUED FOR
FRIDAY AND MAY NEED TO BE EXTENDED INTO THE WEEKEND. HEAT INDICES
WILL BE IN THE 105 TO 112 DEGREE RANGE IN MANY LOCATIONS.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT IS NOT
EXPECTED AT THIS TIME.

In the hours before

Local storm report, Aug 4, 2:48 PM CDT, 47 minutes before
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Special weather statement, Aug 4, 3:19 PM CDT, 16 minutes before
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Special weather statement, Aug 4, 3:22 PM CDT, 13 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 4, 3:33 AM CDTHeat AdvisoryBMXAutauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more63 hr
Aug 4, 6:37 PM CDTAreal Flood AdvisoryBMXSumter113 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2010Every severe thunderstorm 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.