Alert archive / Alabama / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 221, NWS Birmingham, AL

June 25, 2010Tuscaloosa County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jun 25, 2010, 1:52 PM CDT for Tuscaloosa County, Alabama. It was in force for 38 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: Jun 25, 2010, 1:52 PM CDT (18:52 UTC)
Expired: Jun 25, 2010, 2:30 PM CDT
In force: 38 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

County Tuscaloosa County, AL

The radar

The Birmingham radar (KBMX), 71 km from the middle of the area, began a volume at 18:52 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

Birmingham, AL (KBMX), launched 12:00Z, 6.9 hours before the alert went out and 70 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: 1895 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 962 m above ground
0-6 km bulk shear: 2 kt
0-1 km storm-relative helicity: -32 m²/s²
0-3 km storm-relative helicity: -32 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 Jun 25, 1:10 PM CDT, 42 minutes earlier.

Area forecast discussion, Jun 25, 1:10 PM CDT, 42 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
110 PM CDT FRI JUN 25 2010

.UPDATE...AFTERNOON DISCUSSION.

&&

.DISCUSSION...

HAVE INCREASED THE POPS FOR THIS AFTERNOON TO 70 PERCENT NORTH AND
30 PERCENT SOUTH.  NUMEROUS SHOWERS AND THUNDERSTORMS EXPECTED TO
AFFECT THE NORTHERN HALF OF CWA THIS AFTERNOON WHERE CONVECTION HAS
STARTED EARLY TODAY.  WILL HAVE TO WATCH THE SOUTHERN HALF FOR
OUTFLOW BOUNDARIES AND AN INCREASE IN COVERAGE.

03

&&

.AVIATION...18Z TAF DISCUSSION.

SCATTERED TO WIDESPREAD THUNDERSTORMS ARE ONGOING AT OR IN THE
VICINITY OF TCL EET BHM AND ANB AND ARE EXPECTED TO INCREASE IN BOTH
COVERAGE AND INTENSITY OVER THE NEXT SEVERAL HOURS.  MGM AND TOI
WILL LIKELY EXPERIENCE THUNDERSTORMS BY 20-21Z.  BRIEF INTENSE
RAINFALL MAY RESULT IN VISIBILITY BELOW 1 MILE...AND ABRUPT WIND
CHANGES IN BOTH SPEED AND DIRECTION ARE POSSIBLE AT ALL SITES.
WET MICROBURSTS ARE ALSO A CONCERN THIS AFTERNOON.

THUNDERSTORMS ARE EXPECTED TO GRADUALLY DIMINISH IN INTENSITY AND
COVERAGE AFTER SUNSET...BUT A FEW STORMS MAY LINGER AS LATE AS
06Z.

PREVAILING WINDS WILL GENERALLY BE FROM WEST AT AROUND 5-7
KNOTS...THEN BECOMING CALM OVERNIGHT.

NOTICE...KEET TAF WILL HAVE (AMD LTD TO VIS WIND AND WX) AMENDED TO
THE END OF THE FORECAST UNTIL FURTHER NOTICE WHILE CEILOMETER DATA
IS BEING MONITORED FOR ACCURACY.

12/SIRMON

&&

.BMX WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

Hazardous weather outlook, Jun 25, 10:30 AM CDT, 3 hours 22 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1030 AM CDT FRI JUN 25 2010

ALZ011>015-017>050-261530-
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-
1030 AM CDT FRI JUN 25 2010

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

ISOLATED TO SCATTERED SEVERE STORMS ARE POSSIBLE BETWEEN NOON AND 8
PM...GENERALLY ALONG AND NORTH OF A LINE FROM ALICEVILLE TO CALERA
TO HEFLIN. WHILE MOST OF THESE STORMS ARE EXPECTED TO CONTAIN GUSTY
WINDS OF 50 MPH OR LESS AND SMALL HAIL...A FEW COULD REACH SEVERE
LIMITS WITH WINDS IN EXCESS OF 60 MPH.

ELSEWHERE...FURTHER SOUTH...STRONG STORMS WILL BE POSSIBLE BETWEEN
NOON AND 8 PM. WIND GUSTS LESS THAN 50 MPH WILL BE THE MAIN
THREAT...ALONG WITH BRIEF HEAVY RAINFALL.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT MAY BE NEEDED
ACROSS THE NORTH THIS AFTERNOON.

17/KLAWS

In the hours before

Special weather statement, Jun 25, 12:27 PM CDT, 1 hour 25 minutes before

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Special weather statement, Jun 25, 12:38 PM CDT, 1 hour 14 minutes before

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Special weather statement, Jun 25, 1:18 PM CDT, 34 minutes before

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Special weather statement, Jun 25, 1:30 PM CDT, 22 minutes before

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Special weather statement, Jun 25, 1:42 PM CDT, 10 minutes before

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Special weather statement, Jun 25, 1:47 PM CDT, 5 minutes before

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        The site you requested is temporarily down for maintenance or an unexpected outage.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 2:06 PM CDT	Areal Flood Advisory	BMX	Tuscaloosa	54 min
Jun 25, 2:06 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson, St. Clair, Shelby, Talladega	54 min
Jun 25, 2:18 PM CDT	Flash Flood Warning	BMX	Tuscaloosa	3 hr
Jun 25, 2:23 PM CDT	Severe Thunderstorm Warning	BMX	Hale, Tuscaloosa	30 min
Jun 25, 2:25 PM CDT	Areal Flood Advisory	BMX	Blount, Etowah, St. Clair	65 min
Jun 25, 2:47 PM CDT	Areal Flood Advisory	BMX	Winston	58 min
Jun 25, 2:59 PM CDT	Flash Flood Warning	BMX	Winston	3 hr
Jun 25, 3:39 PM CDT	Severe Thunderstorm Warning	BMX	Elmore, Tallapoosa	37 min
Jun 25, 4:05 PM CDT	Areal Flood Advisory	BMX	Marion	3 hr
Jun 25, 4:26 PM CDT	Severe Thunderstorm Warning	BMX	Marion, Walker, Winston	34 min

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.