Alert archive / Alabama / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 142, NWS Birmingham, AL

May 28, 2010Pickens County, Sumter County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at May 28, 2010, 7:56 PM CDT for Pickens County, Sumter County, Alabama. It was in force for 34 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: May 28, 2010, 7:56 PM CDT (00:56 UTC)
Expired: May 28, 2010, 8:30 PM CDT
In force: 34 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Pickens County, AL, Sumter County, AL

The radar

The Columbus AFB radar (KGWX), 108 km from the middle of the area, began a volume at 01:00 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

Little Rock, AR (KLZK), launched 00:00Z, 0.9 hours before the alert went out and 269 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1902 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1185 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 29 m²/s²
0-3 km storm-relative helicity: 29 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.0

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 May 28, 6:41 PM CDT, 1 hour 15 minutes earlier.

Area forecast discussion, May 28, 6:41 PM CDT, 1 hour 15 minutes before

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Hazardous weather outlook, May 28, 11:53 AM CDT, 8 hours 3 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1153 AM CDT FRI MAY 28 2010

ALZ011>015-017>050-291653-
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-
1153 AM CDT FRI MAY 28 2010

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

.DAY ONE...TODAY AND TONIGHT.

ISOLATED TO SCATTERED THUNDERSTORMS WILL DEVELOP THIS AFTERNOON AS
A LOW PRESSURE SYSTEM MOVES CLOSER TO CENTRAL ALABAMA. SOME STORMS
COULD BE STRONG TO SEVERE THROUGH 8 PM THIS EVENING. THE BEST CHANCE
FOR SEVERE STORMS WILL GENERALLY BE ALONG AND NORTH OF A LINE FROM
CARROLLTON..TO CALERA...TO ROANOKE. THE MAIN THREATS IN THIS AREA
WILL BE DAMAGING WINDS AND LARGE HAIL.

STRONG STORMS WILL BE POSSIBLE ACROSS THE REMAINDER OF CENTRAL
ALABAMA...WITH WIND GUSTS OF 40 TO 50 MPH AND SMALL HAIL BEING THE
MAIN THREATS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

STRONG STORMS WILL ALSO BE POSSIBLE ON SATURDAY FROM NOON TO 8 PM.
THE MAIN THREATS WILL AGAIN BE WIND GUSTS OF 40 TO 50 MPH AND SMALL
HAIL.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Special weather statement, May 28, 7:07 PM CDT, 49 minutes before

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Special weather statement, May 28, 7:17 PM CDT, 39 minutes before

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Special weather statement, May 28, 7:20 PM CDT, 36 minutes before

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Special weather statement, May 28, 7:48 PM CDT, 8 minutes before

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Local storm report, May 28, 7:50 PM CDT, 6 minutes before

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Special weather statement, May 28, 7:52 PM CDT, 4 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 7:26 PM CDT	Severe Thunderstorm Warning	BMX	Chambers	14 min
May 28, 7:28 PM CDT	Severe Thunderstorm Warning	BMX	Sumter	32 min
May 28, 8:03 PM CDT	Severe Thunderstorm Warning	BMX	Coosa, Shelby, Talladega	16 min
May 29, 12:28 PM CDT	Severe Thunderstorm Warning	BMX	Montgomery, Pike	47 min
May 29, 12:49 PM CDT	Areal Flood Advisory	BMX	Lee	3 hr
May 29, 12:55 PM CDT	Severe Thunderstorm Warning	BMX	Chambers, Lee	23 min
May 29, 1:11 PM CDT	Flash Flood Warning	BMX	Lee	3 hr
May 29, 1:57 PM CDT	Flash Flood Warning	BMX	Calhoun	3 hr
May 29, 1:58 PM CDT	Severe Thunderstorm Warning	BMX	Chambers	32 min
May 29, 4:54 PM CDT	Flash Flood Warning	BMX	Hale	2 hr

Nearby

Severe Thunderstorm Warnings in Alabama, 2010 Every 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; radar from the NEXRAD Level II archive.