Alert archive / Alabama / Special Weather Statements in 2017

Special Weather Statement, NWS Birmingham, AL

July 25, 2017Autauga County, Alabama

NWS Birmingham, AL issued this special weather statement at Jul 25, 2017, 5:48 PM CDT for Autauga County, Alabama. It was in force for 27 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 25, 2017, 5:48 PM CDT (22:48 UTC)
Expired: Jul 25, 2017, 6:15 PM CDT
In force: 27 min
Issued by: NWS Birmingham, AL

County Autauga County, AL

The radar

The Birmingham radar (KBMX), 70 km from the middle of the area, began a volume at 22:49 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 12:00Z, 10.8 hours before the alert went out and 243 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: 756 J/kg
Mixed-layer CIN: -49 J/kg
Mixed-layer LCL: 804 m above ground
0-6 km bulk shear: 7 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 9 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 Jul 25, 1:34 PM CDT, 4 hours 14 minutes earlier.

Area forecast discussion, Jul 25, 1:34 PM CDT, 4 hours 14 minutes before

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<head>
  <meta charset="utf-8">
  <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.
      </p>
      <p id="message2">
        Please try again in a few minutes.
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Hazardous weather outlook, Jul 25, 4:03 AM CDT, 13 hours 45 minutes before

Hazardous Weather Outlook
National Weather Service Birmingham AL
403 AM CDT Tue Jul 25 2017

ALZ011>015-017>050-261215-
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-
403 AM CDT Tue Jul 25 2017

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...Wednesday through Monday.

Heat indices expected to reach 105 degrees Wednesday and Thursday
afternoons across Western portions of Central Alabama.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Special weather statement, Jul 25, 5:14 PM CDT, 34 minutes before

Special Weather Statement
National Weather Service Birmingham AL
514 PM CDT TUE JUL 25 2017

ALZ027-252245-
Talladega AL-
514 PM CDT TUE JUL 25 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL TALLADEGA COUNTY
UNTIL 545 PM CDT...

At 514 PM CDT, Doppler radar was tracking a strong thunderstorm over
Winterboro, or 8 miles east of Childersburg, moving west at 15 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Sylacauga, Alpine, Sycamore and Winterboro.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3322 8628 3335 8632 3339 8617 3328 8612
      3327 8612
TIME...MOT...LOC 2214Z 069DEG 11KT 3331 8622

32/Davis

Special weather statement, Jul 25, 5:48 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Birmingham AL
548 PM CDT TUE JUL 25 2017

ALZ040-041-252315-
Autauga AL-Dallas AL-
548 PM CDT TUE JUL 25 2017

...SIGNIFICANT WEATHER ADVISORY FOR WEST CENTRAL AUTAUGA AND
NORTHEASTERN DALLAS COUNTIES UNTIL 615 PM CDT...

At 548 PM CDT, Doppler radar was tracking a strong thunderstorm near
Valley Grande, moving west at 10 mph.

Winds in excess of 40 mph will be possible with this storm.

Locations impacted include...
Valley Grande, Burnsville, Valley Creek Junction and Barrett Creek.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

&&

LAT...LON 3264 8688 3247 8680 3244 8699 3257 8705
TIME...MOT...LOC 2248Z 069DEG 10KT 3254 8693

32/Davis

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 25, 6:56 AM CDT	Areal Flood Advisory	BMX	Chambers, Tallapoosa	3 hr
Jul 25, 7:34 AM CDT	Flash Flood Warning	BMX	Chambers, Tallapoosa	3 hr
Jul 25, 7:55 AM CDT	Areal Flood Advisory	BMX	Lee, Russell	3 hr
Jul 25, 9:14 AM CDT	Areal Flood Advisory	BMX	Bullock, Coosa, Elmore, Macon, Montgomery	3 hr
Jul 25, 9:40 AM CDT	Flash Flood Warning	BMX	Russell	2 hr
Jul 25, 5:14 PM CDT	Special Weather Statement	BMX	Talladega	31 min
Jul 25, 6:25 PM CDT	Special Weather Statement	BMX	Etowah	35 min

Nearby

Special Weather Statements in Alabama, 2017 Every special weather statement in 2017

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.