Alert archive / Alabama / Flash Flood Warnings in 2023

Flash Flood Warning 1, NWS Huntsville, AL

January 3, 2023Lawrence County, Limestone County, Morgan County, Alabama

NWS Huntsville, AL issued this flash flood warning at Jan 3, 2023, 11:55 AM CST for Lawrence County, Limestone County, Morgan County, Alabama. It was in force for 115 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 3, 2023, 11:55 AM CST (17:55 UTC)
Expired: Jan 3, 2023, 1:50 PM CST
In force: 115 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon
Flood severity: None

Counties Lawrence County, AL, Limestone County, AL, Morgan County, AL

The radar

The Northeast Alabama radar (KHTX), 96 km from the middle of the area, began a volume at 17:55 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 12:00Z, 5.9 hours before the alert went out and 159 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: 169 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 620 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 257 m²/s²
0-3 km storm-relative helicity: 318 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.1

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood 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 flash flood warning went out at Jan 3, 10:49 AM CST, 1 hour 6 minutes earlier.

Area forecast discussion, Jan 3, 10:49 AM CST, 1 hour 6 minutes before

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In the hours before

Local storm report, Jan 3, 11:48 AM CST, 7 minutes before

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<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.
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The office that day

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

Issued	Product	Office	Counties	Lasted
Jan 3, 10:14 AM CST	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lauderdale	46 min
Jan 3, 10:58 AM CST	Severe Thunderstorm Warning	HUN	Colbert, Franklin, Lauderdale, Lawrence	27 min
Jan 3, 11:57 AM CST	Special Weather Statement	HUN	Madison	33 min
Jan 3, 11:59 AM CST	Special Weather Statement	HUN	Madison, Morgan	31 min
Jan 3, 12:21 PM CST	Special Weather Statement	HUN	Cullman, Marshall	39 min
Jan 3, 12:27 PM CST	Special Weather Statement	HUN	Jackson, Madison, Morgan	48 min
Jan 3, 12:59 PM CST	Special Weather Statement	HUN	DeKalb, Jackson, Marshall	46 min
Jan 3, 1:02 PM CST	Areal Flood Warning	HUN	Cullman, Limestone, Madison, Morgan	2 hr
Jan 3, 1:06 PM CST	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	24 min
Jan 3, 1:49 PM CST	Special Weather Statement	HUN	DeKalb, Marshall	41 min
Jan 3, 4:44 PM CST	Special Weather Statement	HUN	Cullman	46 min
Jan 3, 12:16 PM CST	Special Weather Statement	HUN	Franklin	44 min

Nearby

Flash Flood Warnings in Alabama, 2023 Every flash flood warning in 2023

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.