Alert archive / Alabama / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 268, NWS Birmingham, AL

May 28, 2009Macon County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at May 28, 2009, 2:49 PM CDT for Macon County, Alabama. It was in force for 26 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, 2009, 2:49 PM CDT (19:49 UTC)
Expired: May 28, 2009, 3:15 PM CDT
In force: 26 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

County Macon County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 7.8 hours before the alert went out and 135 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: 970 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 598 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 49 m²/s²
0-3 km storm-relative helicity: 102 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.6

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, 12:55 PM CDT, 1 hour 54 minutes earlier.

Area forecast discussion, May 28, 12:55 PM CDT, 1 hour 54 minutes before

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Hazardous weather outlook, May 28, 2:20 PM CDT, 29 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
220 PM CDT THU MAY 28 2009

ALZ011>015-017>050-291130-
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-
220 PM CDT THU MAY 28 2009

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

A FEW THUNDERSTORMS WILL BE CAPABLE OF PRODUCING DAMAGING WIND
GUSTS...LOCALLY HEAVY RAIN....AND LARGE HAIL. THESE STORMS WILL
DEVELOP GENERALLY ALONG THE INTERSTATE 59 CORRIDOR AND EASTWARD...
AND THEN MOVE EASTWARD. THE STORMS STRENGTH WILL DECREASE BETWEEN 8
PM AND 11 PM FROM WEST TO EAST.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT MAY BECOME
NECESSARY THROUGH THIS EVENING.

75/LINHARES

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 7:30 PM CDT	Areal Flood Advisory	BMX	Winston	2 hr
May 27, 7:56 PM CDT	Areal Flood Advisory	BMX	Marengo, Sumter	64 min
May 27, 9:02 PM CDT	Areal Flood Advisory	BMX	Blount	118 min
May 28, 2:48 PM CDT	Severe Thunderstorm Warning	BMX	Lee	27 min
May 28, 3:07 PM CDT	Severe Thunderstorm Warning	BMX	Lee	25 min
May 28, 3:09 PM CDT	Severe Thunderstorm Warning	BMX	Macon	36 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2009 Every severe thunderstorm 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.