Alert archive / Alabama / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 148, NWS Birmingham, AL

May 30, 2010Macon County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at May 30, 2010, 4:13 PM CDT for Macon County, Alabama. It was in force for 32 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 30, 2010, 4:13 PM CDT (21:13 UTC)
Expired: May 30, 2010, 4:45 PM CDT
In force: 32 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, 9.2 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: 683 J/kg
Mixed-layer CIN: -36 J/kg
Mixed-layer LCL: 569 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 36 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 30, 3:26 PM CDT, 47 minutes earlier.

Area forecast discussion, May 30, 3:26 PM CDT, 47 minutes before

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Hazardous weather outlook, May 30, 2:29 PM CDT, 1 hour 44 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
229 PM CDT SUN MAY 30 2010

ALZ011>015-017>050-311930-
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-
229 PM CDT SUN MAY 30 2010

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

.DAY ONE...TODAY AND TONIGHT.

SCATTERED TO NUMEROUS STRONG THUNDERSTORMS...WITH WIND GUSTS UP TO
50 MPH...SMALL HAIL...AND VERY HEAVY RAINFALL...ARE EXPECTED ACROSS
CENTRAL ALABAMA THROUGH THE AFTERNOON.  THE STORMS WILL REACH THEIR
PEAK COVERAGE AND INTENSITY BETWEEN 3 AND 5 PM...BUT COULD LAST AS
LATE AS 9 PM THIS EVENING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

STRONG STORMS WILL BE POSSIBLE ON MONDAY FROM NOON TO 9 PM. THE MAIN
THREATS WILL BE WIND GUSTS OF 40 TO 50 MPH.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT MAY BE NEEDED
ON A LIMITED BASIS THROUGH 9 PM.

61

In the hours before

Local storm report, May 30, 2:16 PM CDT, 1 hour 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
216 PM CDT SUN MAY 30 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0150 PM     HAIL             3 SSW EMERALD MOUNTAIN  32.42N 86.14W
05/30/2010  E0.50 INCH       MONTGOMERY         AL   PUBLIC

            MARBLE SIZE HAIL REPORTED AT TALLAPOOSA LAKES GOLF
            COURSE.

&&

Special weather statement, May 30, 2:26 PM CDT, 1 hour 47 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
226 PM CDT SUN MAY 30 2010

ALZ043-045-302015-
ELMORE-MACON-
226 PM CDT SUN MAY 30 2010

...SIGNIFICANT WEATHER ALERT FOR ELMORE AND MACON COUNTIES UNTIL 315
PM CDT...

AT 222 PM CDT...THE NATIONAL WEATHER SERVICE IS TRACKING A STRONG
THUNDERSTORM NEAR TYSONVILLE...OR 7 MILES WEST OF MILSTEAD...MOVING
EAST AT 10 MPH.

NICKEL SIZE HAIL AND WINDS UP TO 40 MPH ARE EXPECTED WITH THIS STORM.

SEEK SHELTER AND STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL
TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS
CONCERNING THIS WEATHER SITUATION.

27

Special weather statement, May 30, 3:21 PM CDT, 52 minutes before

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Special weather statement, May 30, 3:26 PM CDT, 47 minutes before

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Special weather statement, May 30, 3:45 PM CDT, 28 minutes before

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Special weather statement, May 30, 4:00 PM CDT, 13 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 30, 11:40 AM CDT	Areal Flood Advisory	BMX	Jefferson	2 hr
May 30, 1:31 PM CDT	Severe Thunderstorm Warning	BMX	Elmore, Montgomery	44 min
May 30, 2:33 PM CDT	Areal Flood Advisory	BMX	St. Clair	3 hr
May 30, 3:11 PM CDT	Flash Flood Warning	BMX	Elmore	3 hr
May 30, 3:53 PM CDT	Areal Flood Advisory	BMX	Chilton	3 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.