Alert archive / Alabama / Areal Flood Advisories in 2021

Areal Flood Advisory 41, NWS Birmingham, AL

June 6, 20217 counties in Alabama

NWS Birmingham, AL issued this areal flood advisory at Jun 6, 2021, 3:22 PM CDT for 7 counties in Alabama. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Jun 6, 2021, 3:22 PM CDT (20:22 UTC)
Expired: Jun 6, 2021, 6:30 PM CDT
In force: 3 hr
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Bibb County, AL, Dallas County, AL, Greene County, AL, Hale County, AL, Marengo County, AL, Perry County, AL, Tuscaloosa County, AL

The radar

The Birmingham radar (KBMX), 83 km from the middle of the area, began a volume at 20:25 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, 8.4 hours before the alert went out and 83 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: 136 J/kg
Mixed-layer CIN: -17 J/kg
Mixed-layer LCL: 780 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 77 m²/s²
0-3 km storm-relative helicity: 184 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 areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Birmingham, AL wrote its last area forecast discussion before this areal flood advisory went out at Jun 6, 1:10 PM CDT, 2 hours 12 minutes earlier.

Area forecast discussion, Jun 6, 1:10 PM CDT, 2 hours 12 minutes before

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Hazardous weather outlook, Jun 6, 3:05 AM CDT, 12 hours 17 minutes before

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In the hours before

Local storm report, Jun 6, 1:49 PM CDT, 1 hour 33 minutes before

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Special weather statement, Jun 6, 1:57 PM CDT, 1 hour 25 minutes before

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Special weather statement, Jun 6, 2:05 PM CDT, 1 hour 17 minutes before

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<head>
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  <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 Birmingham, AL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 5, 7:29 PM CDT	Special Weather Statement	BMX	Russell	31 min
Jun 6, 1:57 PM CDT	Special Weather Statement	BMX	Marengo	48 min
Jun 6, 2:05 PM CDT	Special Weather Statement	BMX	Hale	40 min
Jun 6, 3:59 PM CDT	Special Weather Statement	BMX	Bibb	46 min
Jun 6, 4:05 PM CDT	Areal Flood Advisory	BMX	Pickens	3 hr
Jun 6, 4:42 PM CDT	Special Weather Statement	BMX	Jefferson	48 min
Jun 6, 6:05 PM CDT	Areal Flood Advisory	BMX	Autauga, Bibb, Chilton, Jefferson, Shelby	115 min

Nearby

Areal Flood Advisories in Alabama, 2021 Every areal flood advisory in 2021

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.