Alert archive / Alabama / Special Weather Statements in 2021

Special Weather Statement, NWS Birmingham, AL

October 21, 2021Winston County, Alabama

NWS Birmingham, AL issued this special weather statement at Oct 21, 2021, 3:29 PM CDT for Winston County, Alabama. It was in force for 46 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: Oct 21, 2021, 3:29 PM CDT (20:29 UTC)
Expired: Oct 21, 2021, 4:15 PM CDT
In force: 46 min
Issued by: NWS Birmingham, AL
Hail: 0.25 in
Wind: 40

County Winston County, AL

The radar

The Columbus AFB radar (KGWX), 77 km from the middle of the area, began a volume at 20:32 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

Nashville Metro, TN (KBNA), launched 12:00Z, 8.5 hours before the alert went out and 247 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: 70 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 671 m above ground
0-6 km bulk shear: 37 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 111 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 Oct 21, 1:43 PM CDT, 1 hour 46 minutes earlier.

Area forecast discussion, Oct 21, 1:43 PM CDT, 1 hour 46 minutes before

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<head>
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  <meta name="viewport" content="width=device-width, initial-scale=1">
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  <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.
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      <p id="message2">
        Please try again in a few minutes.
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Hazardous weather outlook, Oct 21, 4:04 AM CDT, 11 hours 25 minutes before

Hazardous Weather Outlook
National Weather Service Birmingham AL
404 AM CDT Thu Oct 21 2021

ALZ011>015-017>050-221215-
Marion-Lamar-Fayette-Winston-Walker-Blount-Etowah-Calhoun-Cherokee-
Cleburne-Pickens-Tuscaloosa-Jefferson-Shelby-St. Clair-Talladega-
Clay-Randolph-Sumter-Greene-Hale-Perry-Bibb-Chilton-Coosa-Tallapoosa-
Chambers-Marengo-Dallas-Autauga-Lowndes-Elmore-Montgomery-Macon-
Bullock-Lee-Russell-Pike-Barbour-
404 AM CDT Thu Oct 21 2021

This Hazardous Weather Outlook is for the counties served by the
National Weather Service office in Birmingham.

.DAY ONE...Outlook through Tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Friday through Wednesday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Activation of storm spotters and emergency management is not
expected at this time.

In the hours before

Special weather statement, Oct 21, 3:29 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Birmingham AL
329 PM CDT Thu Oct 21 2021

ALZ011-014-015-212115-
Walker AL-Winston AL-Marion AL-
329 PM CDT Thu Oct 21 2021

...A strong thunderstorm will impact portions of northwestern Walker,
east central Marion and southwestern Winston Counties through 415 PM
CDT...

At 328 PM CDT, Doppler radar was tracking a strong thunderstorm over
Lynn, moving east at 20 mph.

HAZARD...Winds in excess of 40 mph and pea size hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

Locations impacted include...
Lynn, Nauvoo, Camp McDowell, Ashbank, Corinth Rec Area, Poplar
Springs, Smith Lake, Natural Bridge, Clear Creek, Seymour Branch,
Curtis Crossroads, Black Pond and Rockhouse Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

To report severe weather, contact your nearest law enforcement
agency. They will relay your report to the National Weather Service
office in Birmingham.

&&

LAT...LON 3401 8770 3413 8767 3412 8732 3401 8729
      3393 8736
TIME...MOT...LOC 2028Z 278DEG 19KT 3405 8758

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH

40/Sizemore

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 21, 8:23 AM CDT	Areal Flood Advisory	BMX	Jefferson, Shelby	65 min
Oct 21, 6:53 PM CDT	Special Weather Statement	BMX	Blount	37 min

Nearby

Special Weather Statements in Alabama, 2021 Every special weather statement 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.