Alert archive / Alabama / Special Weather Statements in 2018

Special Weather Statement, NWS Birmingham, AL

July 21, 2018Cherokee County, Alabama

NWS Birmingham, AL issued this special weather statement at Jul 21, 2018, 4:36 AM CDT for Cherokee County, Alabama. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 21, 2018, 4:36 AM CDT (09:36 UTC)
Expired: Jul 21, 2018, 5:30 AM CDT
In force: 54 min
Issued by: NWS Birmingham, AL

County Cherokee County, AL

The radar

The Northeast Alabama radar (KHTX), 74 km from the middle of the area, began a volume at 09:35 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

Peachtre/Fal Fld, GA (KFFC), launched 00:00Z, 9.6 hours before the alert went out and 153 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: 116 J/kg
Mixed-layer CIN: -123 J/kg
Mixed-layer LCL: 1353 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: -25 m²/s²
0-3 km storm-relative helicity: 16 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.8

Open this sounding in Storm Lab

The text

As transmitted.

<!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>

What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jul 21, 3:28 AM CDT, 1 hour 8 minutes earlier.

Area forecast discussion, Jul 21, 3:28 AM CDT, 1 hour 8 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>

Hazardous weather outlook, Jul 21, 3:24 AM CDT, 1 hour 12 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, Jul 21, 4:36 AM CDT, 0 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
Jul 21, 5:23 AM CDT	Special Weather Statement	BMX	Cherokee	37 min
Jul 21, 6:03 AM CDT	Special Weather Statement	BMX	Cherokee	42 min
Jul 21, 6:41 AM CDT	Special Weather Statement	BMX	Cleburne, Randolph	49 min
Jul 21, 7:01 AM CDT	Special Weather Statement	BMX	Greene	44 min
Jul 21, 8:00 AM CDT	Special Weather Statement	BMX	Hale	30 min
Jul 21, 8:16 AM CDT	Special Weather Statement	BMX	Dallas	44 min
Jul 21, 1:49 PM CDT	Special Weather Statement	BMX	Russell	41 min
Jul 21, 3:49 PM CDT	Special Weather Statement	BMX	Cleburne	26 min
Jul 21, 3:57 PM CDT	Special Weather Statement	BMX	Calhoun	33 min
Jul 21, 4:01 PM CDT	Severe Thunderstorm Warning	BMX	Calhoun, Clay, Cleburne, Randolph	44 min
Jul 21, 4:18 PM CDT	Special Weather Statement	BMX	Cleburne	42 min
Jul 21, 4:23 PM CDT	Special Weather Statement	BMX	Clay	37 min
Jul 21, 4:26 PM CDT	Severe Thunderstorm Warning	BMX	Cleburne	34 min
Jul 21, 4:31 PM CDT	Severe Thunderstorm Warning	BMX	Cleburne	29 min
Jul 21, 4:34 PM CDT	Special Weather Statement	BMX	Chambers	41 min
Jul 21, 4:41 PM CDT	Severe Thunderstorm Warning	BMX	Randolph	49 min
Jul 21, 4:44 PM CDT	Severe Thunderstorm Warning	BMX	Chambers, Clay, Randolph, Tallapoosa	46 min
Jul 21, 4:54 PM CDT	Special Weather Statement	BMX	Cleburne	36 min
Jul 21, 5:00 PM CDT	Severe Thunderstorm Warning	BMX	Cleburne, Randolph	60 min
Jul 21, 5:28 PM CDT	Severe Thunderstorm Warning	BMX	Chambers, Lee, Randolph	62 min
Jul 21, 5:47 PM CDT	Tornado Warning	BMX	Lee	27 min
Jul 21, 5:58 PM CDT	Tornado Warning Tornado observed	BMX	Lee	16 min
Jul 21, 6:11 PM CDT	Severe Thunderstorm Warning	BMX	Lee, Russell	64 min
Jul 21, 6:33 PM CDT	Severe Thunderstorm Warning	BMX	Lee, Russell	54 min

Nearby

Special Weather Statements in Alabama, 2018 Every special weather statement in 2018

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.