Alert archive / Alabama / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 481, NWS Birmingham, AL

August 13, 1999Chambers County, Lee County, Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Aug 13, 1999, 5:18 PM CDT for Chambers County, Lee 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: Aug 13, 1999, 5:18 PM CDT (22:18 UTC)
Expired: Aug 13, 1999, 6:05 PM CDT
In force: 47 min
Issued by: NWS Birmingham, AL
Area: Whole counties

Counties Chambers County, AL, Lee County, AL

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 10.3 hours before the alert went out and 106 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: 1845 J/kg
Mixed-layer CIN: -55 J/kg
Mixed-layer LCL: 1383 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 15 m²/s²
0-3 km storm-relative helicity: 19 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

Special weather statement, Aug 13, 12:31 PM CDT, 4 hours 47 minutes before

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Special weather statement, Aug 13, 12:31 PM CDT, 4 hours 47 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 12, 7:01 PM CDT	Severe Thunderstorm Warning	BMX	Cullman	34 min
Aug 12, 7:06 PM CDT	Severe Thunderstorm Warning	BMX	Lee, Russell	49 min
Aug 12, 8:26 PM CDT	Severe Thunderstorm Warning	BMX	Blount, Etowah, St. Clair	34 min
Aug 12, 9:06 PM CDT	Severe Thunderstorm Warning	BMX	Blount	34 min
Aug 12, 7:21 PM CDT	Flash Flood Warning	BMX	Chattahoochee, Muscogee	3 hr
Aug 12, 7:23 PM CDT	Severe Thunderstorm Warning	BMX	Chattahoochee, Muscogee	32 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.