Alert archive / Alabama / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 114, NWS Birmingham, AL

July 18, 2013Fayette County, Tuscaloosa County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jul 18, 2013, 2:39 AM CDT for Fayette County, Tuscaloosa County, Alabama. It was in force for 51 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: Jul 18, 2013, 2:39 AM CDT (07:39 UTC)
Expired: Jul 18, 2013, 3:30 AM CDT
In force: 51 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Fayette County, AL, Tuscaloosa County, AL

The radar

The Columbus AFB radar (KGWX), 78 km from the middle of the area, began a volume at 07:39 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 00:00Z, 7.7 hours before the alert went out and 87 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: 2456 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1456 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 30 m²/s²
0-3 km storm-relative helicity: 110 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 Jul 17, 11:59 PM CDT, 2 hours 40 minutes earlier.

Area forecast discussion, Jul 17, 11:59 PM CDT, 2 hours 40 minutes before

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Hazardous weather outlook, Jul 17, 10:51 PM CDT, 3 hours 48 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1051 PM CDT WED JUL 17 2013

ALZ011>015-017>050-190400-
MARION-LAMAR-FAYETTE-WINSTON-WALKER-BLOUNT-ETOWAH-CALHOUN-CHEROKEE-
CLEBURNE-PICKENS-TUSCALOOSA-JEFFERSON-SHELBY-ST. CLAIR-TALLADEGA-
CLAY-RANDOLPH-SUMTER-GREENE-HALE-PERRY-BIBB-CHILTON-COOSA-TALLAPOOSA-
CHAMBERS-MARENGO-DALLAS-AUTAUGA-LOWNDES-ELMORE-MONTGOMERY-MACON-
BULLOCK-LEE-RUSSELL-PIKE-BARBOUR-
1051 PM CDT WED JUL 17 2013

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

.DAY ONE...TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

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

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Special weather statement, Jul 18, 1:10 AM CDT, 1 hour 29 minutes before

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Special weather statement, Jul 18, 1:28 AM CDT, 1 hour 11 minutes before

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Special weather statement, Jul 18, 1:36 AM CDT, 1 hour 3 minutes before

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Special weather statement, Jul 18, 1:53 AM CDT, 46 minutes before

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Special weather statement, Jul 18, 2:22 AM CDT, 17 minutes before

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Special weather statement, Jul 18, 2:24 AM CDT, 15 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
Jul 17, 7:05 PM CDT	Special Weather Statement	BMX	Shelby	40 min
Jul 17, 7:41 PM CDT	Special Weather Statement	BMX	Tallapoosa	49 min
Jul 17, 8:56 PM CDT	Special Weather Statement	BMX	Barbour	49 min
Jul 17, 9:51 PM CDT	Special Weather Statement	BMX	Barbour, Russell	39 min
Jul 17, 10:12 PM CDT	Special Weather Statement	BMX	Tuscaloosa	48 min
Jul 17, 11:22 PM CDT	Special Weather Statement	BMX	Hale	23 min
Jul 17, 11:35 PM CDT	Special Weather Statement	BMX	Chilton	25 min
Jul 17, 11:37 PM CDT	Special Weather Statement	BMX	Bibb	23 min
Jul 17, 11:42 PM CDT	Severe Thunderstorm Warning	BMX	Tuscaloosa	48 min
Jul 17, 11:51 PM CDT	Severe Thunderstorm Warning	BMX	Shelby, Talladega	39 min
Jul 17, 11:59 PM CDT	Special Weather Statement	BMX	Lamar	46 min
Jul 18, 12:05 AM CDT	Special Weather Statement	BMX	Perry	40 min
Jul 18, 12:11 AM CDT	Special Weather Statement	BMX	Bibb	49 min
Jul 18, 12:36 AM CDT	Areal Flood Advisory	BMX	Lamar	114 min
Jul 18, 12:43 AM CDT	Special Weather Statement	BMX	Lamar	47 min
Jul 18, 12:44 AM CDT	Special Weather Statement	BMX	Jefferson	46 min
Jul 18, 12:59 AM CDT	Special Weather Statement	BMX	Bibb	46 min
Jul 18, 1:10 AM CDT	Special Weather Statement	BMX	Chilton	50 min
Jul 18, 1:28 AM CDT	Special Weather Statement	BMX	Jefferson	47 min
Jul 18, 1:35 AM CDT	Areal Flood Advisory	BMX	Jefferson	115 min
Jul 18, 1:36 AM CDT	Special Weather Statement	BMX	Bibb	39 min
Jul 18, 1:53 AM CDT	Special Weather Statement	BMX	Walker	52 min
Jul 18, 2:22 AM CDT	Special Weather Statement	BMX	Tuscaloosa	38 min
Jul 18, 2:24 AM CDT	Special Weather Statement	BMX	Fayette	51 min
Jul 18, 2:50 AM CDT	Special Weather Statement	BMX	Pickens	40 min
Jul 18, 3:27 AM CDT	Special Weather Statement	BMX	Pickens	33 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2013 Every severe thunderstorm warning in 2013

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.