Alert archive / Alabama / Severe Thunderstorm Warnings in 2010

Severe Thunderstorm Warning 9, NWS Huntsville, AL

March 12, 2010Franklin County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Mar 12, 2010, 1:54 AM CST for Franklin County, Alabama. It was in force for 36 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 12, 2010, 1:54 AM CST (07:54 UTC)
Expired: Mar 12, 2010, 2:30 AM CST
In force: 36 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

County Franklin County, AL

The radar

The Columbus AFB radar (KGWX), 75 km from the middle of the area, began a volume at 07:55 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, 7.9 hours before the alert went out and 171 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: 687 J/kg
Mixed-layer CIN: -6 J/kg
Mixed-layer LCL: 1228 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 43 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 1.0

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 11, 11:45 PM CST, 2 hours 9 minutes earlier.

Area forecast discussion, Mar 11, 11:45 PM CST, 2 hours 9 minutes before

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Hazardous weather outlook, Mar 11, 8:55 PM CST, 4 hours 59 minutes before

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</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.
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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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The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 12, 2:29 AM CST	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lawrence	46 min
Mar 12, 2:54 AM CST	Severe Thunderstorm Warning	HUN	Lawrence, Limestone	51 min
Mar 12, 3:44 AM CST	Severe Thunderstorm Warning	HUN	Lawrence, Limestone	31 min
Mar 12, 4:21 AM CST	Special Weather Statement	HUN	Limestone, Madison	54 min
Mar 12, 4:27 AM CST	Special Weather Statement	HUN	Lawrence	48 min
Mar 12, 4:53 AM CST	Special Weather Statement	HUN	Cullman	37 min
Mar 12, 5:06 AM CST	Severe Thunderstorm Warning	HUN	Cullman, Morgan	39 min
Mar 12, 5:16 AM CST	Special Weather Statement	HUN	Madison	29 min
Mar 12, 5:30 AM CST	Severe Thunderstorm Warning	HUN	Limestone, Madison	45 min
Mar 12, 5:49 AM CST	Severe Thunderstorm Warning	HUN	Cullman, Morgan	41 min
Mar 12, 6:10 AM CST	Severe Thunderstorm Warning	HUN	Madison	35 min
Mar 12, 6:18 AM CST	Severe Thunderstorm Warning	HUN	Madison, Morgan	27 min
Mar 12, 6:39 AM CST	Special Weather Statement	HUN	Jackson, Marshall	51 min
Mar 12, 6:51 AM CST	Special Weather Statement	HUN	Jackson	39 min
Mar 12, 7:17 AM CST	River Flood Warning	HUN	Lawrence	25 hr
Mar 12, 8:36 AM CST	Special Weather Statement	HUN	Cullman, Marshall, Morgan	39 min
Mar 12, 9:09 AM CST	Severe Thunderstorm Warning	HUN	Madison, Marshall	39 min
Mar 12, 9:30 AM CST	Special Weather Statement	HUN	DeKalb, Jackson	60 min
Mar 12, 9:33 AM CST	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	57 min
Mar 12, 10:13 AM CST	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	39 min
Mar 12, 4:58 AM CST	Severe Thunderstorm Warning	HUN	Lincoln, Moore	32 min
Mar 12, 5:36 AM CST	Special Weather Statement	HUN	Lincoln, Moore	24 min
Mar 12, 6:53 AM CST	Special Weather Statement	HUN	Franklin, Moore	52 min

Nearby

Severe Thunderstorm Warnings in Alabama, 2010 Every severe thunderstorm warning in 2010

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.