Alert archive / Alabama / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 26, NWS Birmingham, AL

January 18, 1999Jefferson County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jan 18, 1999, 2:18 AM CST for Jefferson County, Alabama. It was in force for 47 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: Jan 18, 1999, 2:18 AM CST (08:18 UTC)
Expired: Jan 18, 1999, 3:05 AM CST
In force: 47 min
Issued by: NWS Birmingham, AL
Area: Whole counties

County Jefferson County, AL

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jan 18, 1:15 AM CST	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 8.3 hours before the alert went out and 223 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: 378 J/kg
Mixed-layer CIN: -82 J/kg
Mixed-layer LCL: 721 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 617 m²/s²
0-3 km storm-relative helicity: 700 m²/s²
Significant tornado parameter: 1.2
Supercell composite: 5.9

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

Local storm report, Jan 18, 12:06 AM CST, 2 hours 12 minutes before

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Special weather statement, Jan 18, 12:22 AM CST, 1 hour 56 minutes before

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Special weather statement, Jan 18, 1:27 AM CST, 51 minutes before

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Special weather statement, Jan 18, 2:03 AM CST, 15 minutes before

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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        Please try again in a few minutes.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 17, 7:57 PM CST	Severe Thunderstorm Warning	BMX	Lauderdale	63 min
Jan 17, 8:57 PM CST	Severe Thunderstorm Warning	BMX	Lauderdale	63 min
Jan 17, 11:12 PM CST	Severe Thunderstorm Warning	BMX	Franklin	48 min
Jan 17, 11:16 PM CST	Severe Thunderstorm Warning	BMX	Lawrence	64 min
Jan 17, 11:27 PM CST	Severe Thunderstorm Warning	BMX	Lamar	48 min
Jan 17, 11:29 PM CST	Severe Thunderstorm Warning	BMX	Limestone	46 min
Jan 17, 11:47 PM CST	Severe Thunderstorm Warning	BMX	Marion	48 min
Jan 17, 11:58 PM CST	Severe Thunderstorm Warning	BMX	Madison	32 min
Jan 18, 12:07 AM CST	Severe Thunderstorm Warning	BMX	Jackson	48 min
Jan 18, 12:45 AM CST	Severe Thunderstorm Warning	BMX	Cullman	50 min
Jan 18, 12:56 AM CST	Severe Thunderstorm Warning	BMX	Marshall, Morgan	49 min
Jan 18, 1:12 AM CST	Severe Thunderstorm Warning	BMX	Winston	33 min
Jan 18, 1:33 AM CST	Severe Thunderstorm Warning	BMX	Pickens	32 min
Jan 18, 1:38 AM CST	Severe Thunderstorm Warning	BMX	DeKalb	47 min
Jan 18, 1:40 AM CST	Severe Thunderstorm Warning	BMX	Cullman	50 min
Jan 18, 1:44 AM CST	Severe Thunderstorm Warning	BMX	Walker	46 min
Jan 18, 1:50 AM CST	Severe Thunderstorm Warning	BMX	Tuscaloosa	45 min
Jan 18, 2:00 AM CST	Severe Thunderstorm Warning	BMX	Blount	45 min
Jan 18, 2:29 AM CST	Severe Thunderstorm Warning	BMX	Etowah	46 min
Jan 18, 2:34 AM CST	Severe Thunderstorm Warning	BMX	Tuscaloosa	21 min
Jan 18, 2:38 AM CST	Severe Thunderstorm Warning	BMX	Marshall	47 min
Jan 18, 3:26 AM CST	Severe Thunderstorm Warning	BMX	Cherokee	49 min

Nearby

Severe Thunderstorm Warnings in Alabama, 1999 Every severe thunderstorm warning in 1999

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.