Alert archive / Alabama / Severe Thunderstorm Warnings in 2019

Severe Thunderstorm Warning 50, NWS Birmingham, AL

April 7, 2019Fayette County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Apr 7, 2019, 4:00 PM CDT for Fayette County, Alabama. It was in force for 30 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: Apr 7, 2019, 4:00 PM CDT (21:00 UTC)
Expired: Apr 7, 2019, 4:30 PM CDT
In force: 30 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Fayette County, AL

The radar

The Columbus AFB radar (KGWX), 58 km from the middle of the area, began a volume at 21:04 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

Jackson, MS (KJAN), launched 12:00Z, 9.0 hours before the alert went out and 268 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: 1228 J/kg
Mixed-layer CIN: -52 J/kg
Mixed-layer LCL: 597 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 3.3

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 Apr 7, 2:00 PM CDT, 2 hours earlier.

Area forecast discussion, Apr 7, 2:00 PM CDT, 2 hours before

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Hazardous weather outlook, Apr 7, 3:06 PM CDT, 54 minutes before

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In the hours before

Special weather statement, Apr 7, 2:44 PM CDT, 1 hour 16 minutes before

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Special weather statement, Apr 7, 3:36 PM CDT, 24 minutes before

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Special weather statement, Apr 7, 3:53 PM CDT, 7 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
Apr 6, 7:08 PM CDT	Severe Thunderstorm Warning	BMX	Greene, Pickens, Sumter	52 min
Apr 6, 7:27 PM CDT	Special Weather Statement	BMX	Fayette, Lamar, Marion, Pickens	63 min
Apr 6, 7:29 PM CDT	Special Weather Statement	BMX	Dallas	31 min
Apr 6, 7:44 PM CDT	Severe Thunderstorm Warning	BMX	Marion, Walker, Winston	46 min
Apr 6, 7:49 PM CDT	Special Weather Statement	BMX	Tuscaloosa	41 min
Apr 6, 8:05 PM CDT	Special Weather Statement	BMX	Jefferson, Walker	40 min
Apr 6, 8:26 PM CDT	Special Weather Statement	BMX	Winston	64 min
Apr 6, 8:34 PM CDT	Special Weather Statement	BMX	Hale	41 min
Apr 6, 8:46 PM CDT	Special Weather Statement	BMX	Bibb, Blount, Chilton, Jefferson, Shelby	29 min
Apr 6, 8:50 PM CDT	Areal Flood Warning	BMX	Bibb, Hale, Marengo, Perry, Tuscaloosa	115 min
Apr 6, 8:55 PM CDT	Areal Flood Advisory	BMX	Bibb, Chilton, Jefferson, Shelby	2 hr
Apr 6, 9:14 PM CDT	Special Weather Statement	BMX	Bibb, Blount, Jefferson, St. Clair, Shelby, Talladega	61 min
Apr 6, 10:04 PM CDT	Special Weather Statement	BMX	Calhoun, Cherokee, Clay, Cleburne, Etowah, Randolph	56 min
Apr 6, 10:40 PM CDT	Areal Flood Advisory	BMX	Chilton	2 hr
Apr 6, 11:16 PM CDT	Special Weather Statement	BMX	Coosa	44 min
Apr 7, 1:05 AM CDT	Special Weather Statement	BMX	Chambers	40 min
Apr 7, 1:21 AM CDT	Special Weather Statement	BMX	Lee	39 min
Apr 7, 2:44 PM CDT	Special Weather Statement	BMX	Marion	61 min
Apr 7, 3:36 PM CDT	Special Weather Statement	BMX	Marion	39 min
Apr 7, 3:53 PM CDT	Special Weather Statement	BMX	Fayette	52 min
Apr 7, 4:15 PM CDT	Special Weather Statement	BMX	Pickens	45 min
Apr 7, 4:38 PM CDT	Areal Flood Advisory	BMX	Fayette	2 hr
Apr 7, 4:42 PM CDT	Special Weather Statement	BMX	Fayette	48 min
Apr 7, 4:58 PM CDT	Special Weather Statement	BMX	Winston	47 min
Apr 7, 5:22 PM CDT	Special Weather Statement	BMX	Pickens	38 min
Apr 7, 5:29 PM CDT	Special Weather Statement	BMX	Walker	31 min
Apr 7, 5:44 PM CDT	Special Weather Statement	BMX	Winston	31 min
Apr 7, 5:59 PM CDT	Severe Thunderstorm Warning	BMX	Walker	46 min
Apr 7, 6:22 PM CDT	Special Weather Statement	BMX	Pickens	53 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2019 Every severe thunderstorm warning in 2019

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.