Alert archive / Alabama / Areal Flood Advisories in 2021

Areal Flood Advisory 161, NWS Mobile, AL

August 1, 2021Choctaw County, Alabama

NWS Mobile, AL issued this areal flood advisory at Aug 1, 2021, 9:06 PM CDT for Choctaw County, Alabama. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Aug 1, 2021, 9:06 PM CDT (02:06 UTC)
Expired: Aug 2, 2021, 12:15 AM CDT
In force: 3 hr
Issued by: NWS Mobile, AL
Area: Storm-based polygon

County Choctaw County, AL

The radar

The Mobile radar (KMOB), 149 km from the middle of the area, began a volume at 02:06 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, 2.1 hours before the alert went out and 190 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: 941 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 1260 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 6 m²/s²
0-3 km storm-relative helicity: 15 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 Mobile, AL wrote its last area forecast discussion before this areal flood advisory went out at Aug 1, 7:34 PM CDT, 1 hour 32 minutes earlier.

Area forecast discussion, Aug 1, 7:34 PM CDT, 1 hour 32 minutes before

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In the hours before

Special weather statement, Aug 1, 4:48 PM CDT, 4 hours 18 minutes before

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Special weather statement, Aug 1, 7:03 PM CDT, 2 hours 3 minutes before

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Special weather statement, Aug 1, 8:12 PM CDT, 54 minutes before

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Special weather statement, Aug 1, 8:17 PM CDT, 49 minutes before

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      <h1 id="headline">This service is currently unavailable.</h1>
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      <p id="message2">
        Please try again in a few minutes.
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Special weather statement, Aug 1, 8:50 PM CDT, 16 minutes before

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      <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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Special weather statement, Aug 1, 9:02 PM CDT, 4 minutes before

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<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>
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</body>
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The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 1, 7:03 PM CDT	Special Weather Statement	MOB	Choctaw	42 min
Aug 1, 8:12 PM CDT	Special Weather Statement	MOB	Conecuh	63 min
Aug 1, 8:17 PM CDT	Special Weather Statement	MOB	Choctaw	43 min
Aug 1, 8:39 PM CDT	Severe Thunderstorm Warning	MOB	Choctaw	51 min
Aug 1, 8:50 PM CDT	Special Weather Statement	MOB	Wilcox	55 min
Aug 1, 9:02 PM CDT	Special Weather Statement	MOB	Choctaw	43 min
Aug 1, 9:18 PM CDT	Severe Thunderstorm Warning	MOB	Conecuh	57 min
Aug 1, 9:35 PM CDT	Flash Flood Warning	MOB	Choctaw	6 hr
Aug 1, 9:51 PM CDT	Severe Thunderstorm Warning	MOB	Wilcox	31 min
Aug 1, 10:21 PM CDT	Special Weather Statement	MOB	Wilcox	54 min
Aug 1, 10:39 PM CDT	Special Weather Statement	MOB	Monroe	51 min
Aug 1, 10:40 PM CDT	Special Weather Statement	MOB	Conecuh	65 min
Aug 2, 2:23 PM CDT	Special Weather Statement	MOB	Conecuh	37 min
Aug 2, 2:59 PM CDT	Special Weather Statement	MOB	Mobile	46 min
Aug 2, 3:04 PM CDT	Special Weather Statement	MOB	Escambia	26 min
Aug 2, 3:10 PM CDT	Areal Flood Advisory	MOB	Mobile	2 hr
Aug 2, 3:29 PM CDT	Special Weather Statement	MOB	Crenshaw	31 min
Aug 2, 3:32 PM CDT	Special Marine Warning	MOB		43 min
Aug 2, 3:42 PM CDT	Special Weather Statement	MOB	Mobile	48 min
Aug 2, 3:47 PM CDT	Special Weather Statement	MOB	Crenshaw	43 min
Aug 2, 4:32 PM CDT	Areal Flood Advisory	MOB	Covington	118 min
Aug 2, 5:37 PM CDT	Special Marine Warning	MOB		83 min
Aug 2, 2:16 PM CDT	Special Weather Statement	MOB	Santa Rosa	29 min
Aug 2, 2:34 PM CDT	Special Weather Statement	MOB	Okaloosa	26 min
Aug 2, 2:56 PM CDT	Areal Flood Advisory	MOB	Okaloosa	2 hr

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.