Alert archive / Alabama / Severe Thunderstorm Warnings in 2020

Severe Thunderstorm Warning 20, NWS Huntsville, AL

March 22, 2020Colbert County, Lauderdale County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Mar 22, 2020, 11:26 PM CDT for Colbert County, Lauderdale County, Alabama. It was in force for 34 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: Mar 22, 2020, 11:26 PM CDT (04:26 UTC)
Expired: Mar 23, 2020, 12:00 AM CDT
In force: 34 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Colbert County, AL, Lauderdale County, AL

The radar

The Columbus AFB radar (KGWX), 115 km from the middle of the area, began a volume at 04:29 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

Birmingham, AL (KBMX), launched 00:00Z, 4.4 hours before the alert went out and 200 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1041 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 267 m²/s²
0-3 km storm-relative helicity: 316 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 Huntsville, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 22, 9:31 PM CDT, 1 hour 55 minutes earlier.

Area forecast discussion, Mar 22, 9:31 PM CDT, 1 hour 55 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>

In the hours before

Special weather statement, Mar 22, 11:07 PM CDT, 19 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 Huntsville, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 22, 11:07 PM CDT	Special Weather Statement	HUN	Colbert, Lauderdale	53 min
Mar 23, 1:44 AM CDT	Special Weather Statement	HUN	Colbert, Franklin	46 min
Mar 23, 2:35 AM CDT	Special Weather Statement	HUN	Lawrence	40 min
Mar 23, 2:36 AM CDT	Special Weather Statement	HUN	Jackson	39 min
Mar 23, 3:16 AM CDT	Special Weather Statement	HUN	Morgan	44 min
Mar 23, 3:59 AM CDT	Special Weather Statement	HUN	Marshall	46 min
Mar 23, 5:38 AM CDT	Special Weather Statement	HUN	Cullman	52 min
Mar 23, 10:33 AM CDT	River Flood Warning	HUN	Jackson, Madison, Marshall	4 days
Mar 23, 10:34 AM CDT	River Flood Warning	HUN	Madison	56 hr
Mar 23, 12:27 PM CDT	Areal Flood Warning	HUN	Madison	7 hr
Mar 22, 11:59 PM CDT	Special Weather Statement	HUN	Giles	16 min
Mar 23, 6:22 AM CDT	Areal Flood Warning	HUN	Franklin, Lincoln, Moore	3 hr
Mar 23, 1:02 PM CDT	River Flood Warning	HUN	Franklin, Lincoln	20 hr

Nearby

Severe Thunderstorm Warnings in Alabama, 2020 Every severe thunderstorm warning in 2020

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.