Alert archive / Alabama / Severe Thunderstorm Warnings in 1991

Severe Thunderstorm Warning 39, NWS Birmingham, AL

April 9, 1991Tuscaloosa County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Apr 9, 1991, 4:51 PM CDT for Tuscaloosa County, Alabama. It was in force for 54 min.

The area

The counties it named.

The facts

Issued: Apr 9, 1991, 4:51 PM CDT (21:51 UTC)
Expired: Apr 9, 1991, 5:45 PM CDT
In force: 54 min
Issued by: NWS Birmingham, AL
Area: Whole counties

County Tuscaloosa County, AL

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.9 hours before the alert went out and 262 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: 2634 J/kg
Mixed-layer CIN: -75 J/kg
Mixed-layer LCL: 622 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 28 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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, Apr 9, 3:24 PM CDT, 1 hour 27 minutes before

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Local storm report, Apr 9, 3:29 PM CDT, 1 hour 22 minutes before

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Special weather statement, Apr 9, 3:39 PM CDT, 1 hour 12 minutes before

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Local storm report, Apr 9, 4:02 PM CDT, 49 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>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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      <p class="small" id="detail">
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Special weather statement, Apr 9, 4:32 PM CDT, 19 minutes before

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<body>
  <main class="wrap">
    <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>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
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      <p id="message2">
        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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Local storm report, Apr 9, 4:49 PM CDT, 2 minutes before

STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
447 PM CDT TUE APR 9 1991

305 PM CDT...HALE COUNTY, AL...CITY OF MOUNDVILLE...MARBLE SIZED HAIL
             FELL.
410 PM CDT...MARION COUNTY, AL...MARBVLE SIZED HAIL FELL IN GUIN.

425 PM CDT...ETOWAH COUNTY, AL...GOLFBALL SIZED HAIL FELL EAST OF THE CITY
              OF GADSDEN.

440 PM CDT...CHILTON COUNTY, AL...DIME SIZED HAIL FELL NORTH OF THE
             COMMUNITY OF JEMISON.

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 9, 12:08 PM CDT	Severe Thunderstorm Warning	BMX	Colbert, Franklin, Lauderdale	67 min
Apr 9, 1:50 PM CDT	Severe Thunderstorm Warning	BMX	Lawrence, Limestone, Morgan	55 min
Apr 9, 2:08 PM CDT	Severe Thunderstorm Warning	BMX	Madison, Morgan	44 min
Apr 9, 2:08 PM CDT	Severe Thunderstorm Warning	BMX	Lawrence, Limestone	23 min
Apr 9, 2:21 PM CDT	Severe Thunderstorm Warning	BMX	Hale, Tuscaloosa	69 min
Apr 9, 2:25 PM CDT	Severe Thunderstorm Warning	BMX	Fayette	65 min
Apr 9, 2:31 PM CDT	Severe Thunderstorm Warning	BMX	Jackson, Madison, Marshall, Morgan	59 min
Apr 9, 2:56 PM CDT	Severe Thunderstorm Warning	BMX	Tuscaloosa	64 min
Apr 9, 4:31 PM CDT	Severe Thunderstorm Warning	BMX	Etowah	44 min
Apr 9, 4:44 PM CDT	Severe Thunderstorm Warning	BMX	Walker, Winston	61 min
Apr 9, 4:54 PM CDT	Severe Thunderstorm Warning	BMX	Fayette	51 min
Apr 9, 5:42 PM CDT	Severe Thunderstorm Warning	BMX	Tuscaloosa, Walker	48 min
Apr 9, 6:43 PM CDT	Severe Thunderstorm Warning	BMX	Limestone, Morgan	37 min
Apr 9, 6:47 PM CDT	Severe Thunderstorm Warning	BMX	Jefferson	43 min
Apr 9, 6:55 PM CDT	Severe Thunderstorm Warning	BMX	Shelby	50 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.