Alert archive / Alabama / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 9, NWS Birmingham, AL

March 22, 1991Lawrence County, Limestone County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Mar 22, 1991, 8:41 PM CST for Lawrence County, Limestone County, Alabama. It was in force for 64 min.

The area

The counties it named.

The facts

Issued: Mar 22, 1991, 8:41 PM CST (02:41 UTC)
Expired: Mar 22, 1991, 9:45 PM CST
In force: 64 min
Issued by: NWS Birmingham, AL
Area: Whole counties

Counties Lawrence County, AL, Limestone County, AL

The nearest sounding before it

Nashville Metro, TN (KBNA), launched 00:00Z, 2.7 hours before the alert went out and 170 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: 581 J/kg
Mixed-layer CIN: -35 J/kg
Mixed-layer LCL: 1260 m above ground
0-6 km bulk shear: 66 kt
0-1 km storm-relative helicity: 394 m²/s²
0-3 km storm-relative helicity: 582 m²/s²
Significant tornado parameter: 1.7
Supercell composite: 6.3

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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.

In the hours before

Special weather statement, Mar 22, 3:13 PM CST, 5 hours 28 minutes before

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Special weather statement, Mar 22, 5:07 PM CST, 3 hours 34 minutes before

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Special weather statement, Mar 22, 8:11 PM CST, 30 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
Mar 22, 6:49 PM CST	Severe Thunderstorm Warning	BMX	Colbert, Lauderdale	56 min
Mar 22, 8:47 PM CST	Severe Thunderstorm Warning	BMX	Marion	28 min
Mar 23, 2:00 AM CST	Severe Thunderstorm Warning	BMX	Lamar, Pickens	45 min
Mar 23, 2:12 AM CST	Severe Thunderstorm Warning	BMX	Fayette	48 min
Mar 23, 2:51 AM CST	Severe Thunderstorm Warning	BMX	Walker	39 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1991 Every severe thunderstorm warning in 1991

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.