Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 283, NWS Huntsville, AL

August 7, 2011Franklin County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Aug 7, 2011, 7:14 PM CDT for Franklin County, Alabama. It was in force for 21 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Aug 7, 2011, 7:14 PM CDT (00:14 UTC)
Expired: Aug 7, 2011, 7:35 PM CDT
In force: 21 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

County Franklin County, AL

The radar

The Columbus AFB radar (KGWX), 75 km from the middle of the area, began a volume at 00:15 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, 0.2 hours before the alert went out and 171 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: 873 J/kg
Mixed-layer CIN: -120 J/kg
Mixed-layer LCL: 1649 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 44 m²/s²
0-3 km storm-relative helicity: 87 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 severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Huntsville, AL wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 7, 7:01 PM CDT, 13 minutes earlier.

Area forecast discussion, Aug 7, 7:01 PM CDT, 13 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, Aug 7, 1:07 PM CDT, 6 hours 7 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE HUNTSVILLE AL
107 PM CDT SUN AUG 7 2011

ALZ001>010-016-TNZ076-096-097-080300-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
107 PM CDT SUN AUG 7 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH ALABAMA AND PORTIONS
OF SOUTHERN MIDDLE TENNESSEE.

.DAY ONE...THIS AFTERNOON AND TONIGHT...

DANGEROUS HEAT INDICES ARE EXPECTED TO SPREAD ACROSS THE
AREA...ESPECIALLY OVER NORTHWEST ALABAMA WHERE HEAT INDICES ARE
EXPECTED TO RISE BETWEEN 105 AND 110. ELSEWHERE...HEAT INDICES ARE
FORECAST TO BE BETWEEN 100 AND 105. PLEASE REFER TO THE HEAT ADVISORY
THAT HAS BEEN ISSUED FOR NORTHWEST ALABAMA FOR MORE INFORMATION.

AFTERNOON AND EVENING THUNDERSTORMS ARE EXPECTED TODAY ACROSS THE AREA.
THE STRONGEST STORMS MAY BRING GUSTY WINDS...FREQUENT LIGHTNING...AND
LOCALLY HEAVY RAINFALL.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY...

DANGEROUS HEAT INDICES ARE EXPECTED TO OCCUR AGAIN ON MONDAY ACROSS
ALL OF THE TENNESSEE VALLEY WITH HEAT INDICES RISING BETWEEN 100 AND
105.

MAINLY AFTERNOON AND EVENING SCATTERED THUNDERSTORMS ARE EXPECTED
THROUGH FRIDAY. A FEW STRONG STORMS WILL BE POSSIBLE EACH DAY...
WITH GUSTY WINDS...FREQUENT LIGHTNING...AND LOCALLY HEAVY RAINFALL
THE PRIMARY HAZARDS.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL
IS NOT ANTICIPATED AT THIS TIME.

SL/CCC

In the hours before

Special weather statement, Aug 7, 5:34 PM CDT, 1 hour 40 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
534 PM CDT SUN AUG 7 2011

ALZ001-002-004-005-072315-
COLBERT-LAUDERDALE-LAWRENCE-LIMESTONE-
534 PM CDT SUN AUG 7 2011

...SIGNIFICANT WEATHER ADVISORY FOR COLBERT...LAUDERDALE...LAWRENCE
AND LIMESTONE COUNTIES UNTIL 615 PM CDT...

AT 534 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM LEXINGTON TO SAINT
FLORIAN...MOVING EAST AT 25 MPH.

PENNY SIZE HAIL AND WINDS UP TO 50 MPH ARE EXPECTED WITH THESE
STORMS.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  KINGTOWN...KILLEN.
  FORD CITY...CENTER STAR.
  LESTER...WHITEHEAD.
  ELGIN.
  MT ROZELL.
  RED BANK...TOWN CREEK.

REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO THE
STORM TO BE STRUCK BY LIGHTNING. SEEK SAFE SHELTER IMMEDIATELY.

STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL
TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS
CONCERNING THIS WEATHER SITUATION.

&&

LAT...LON 3500 8708 3467 8708 3467 8709 3469 8710
      3467 8711 3467 8756 3485 8782 3499 8774
TIME...MOT...LOC 2234Z 279DEG 24KT 3498 8730 3485 8761

CA

Special weather statement, Aug 7, 5:38 PM CDT, 1 hour 36 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
538 PM CDT SUN AUG 7 2011

ALZ001-002-072315-
COLBERT-LAUDERDALE-
538 PM CDT SUN AUG 7 2011

...SIGNIFICANT WEATHER ADVISORY FOR WESTERN COLBERT AND WESTERN
LAUDERDALE COUNTIES UNTIL 615 PM CDT...

AT 531 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT
THUNDERSTORMS WERE RAPIDLY DEVELOPING BETWEEN MARGERUM AND THE
MISSISSIPPI AND ALABAMA STATE LINE...MOVING EAST AT 25 MPH. A SECOND
CLUSTER OF THUNDERSTORMS WAS MOVING EASTWARD AT 25 MPH FROM
NORTHEAST MISSISSIPPI AS WELL.

NICKEL SIZE HAIL...WINDS UP TO 50 MPH...FREQUENT CLOUD TO GROUND
LIGHTNING...AND HEAVY DOWNPOURS ARE EXPECTED WITH THESE STORMS.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  CHEROKEE.
  SRYGLEY CHURCH.
  BARTON...RED ROCK.
  PRIDE LANDING...OAKLAND.
  NEW BETHEL...CROOKED OAK.
  UNDERWOOD-PETERSVILLE.

REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO THE
STORM TO BE STRUCK BY LIGHTNING. SEEK SAFE SHELTER IMMEDIATELY.

STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL
TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS
CONCERNING THIS WEATHER SITUATION.

&&

LAT...LON 3462 8814 3485 8811 3492 8811 3487 8756
      3457 8752 3458 8814
TIME...MOT...LOC 2236Z 279DEG 24KT 3481 8801

CA

Special weather statement, Aug 7, 6:10 PM CDT, 1 hour 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
610 PM CDT SUN AUG 7 2011

ALZ001-002-004-005-080000-
COLBERT-LAUDERDALE-LAWRENCE-LIMESTONE-
610 PM CDT SUN AUG 7 2011

...SIGNIFICANT WEATHER ADVISORY FOR COLBERT...LAUDERDALE...LAWRENCE
AND LIMESTONE COUNTIES UNTIL 700 PM CDT...

AT 605 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS NEAR ELGIN...OR 18 MILES EAST OF
FLORENCE...MOVING SOUTHEAST AT 15 MPH.

NICKEL SIZE HAIL...WINDS UP TO 50 MPH...FREQUENT CLOUD TO GROUND
LIGHTNING...AND HEAVY DOWNPOURS ARE EXPECTED WITH THESE STORMS.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  ROGERSVILLE...TOWN CREEK.
  GOOD SPRINGS.
  OLIVER.
  NORTH COURTLAND...MT ROZELL.
  COURTLAND...CAIRO.
  COXEY.

REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO THE
STORM TO BE STRUCK BY LIGHTNING. SEEK SAFE SHELTER IMMEDIATELY.

STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL
TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS
CONCERNING THIS WEATHER SITUATION.

&&

LAT...LON 3485 8679 3466 8707 3469 8710 3464 8711
      3449 8731 3477 8760 3497 8716
TIME...MOT...LOC 2310Z 301DEG 15KT 3482 8734

CA

Special weather statement, Aug 7, 6:20 PM CDT, 54 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
620 PM CDT SUN AUG 7 2011

ALZ003-080000-
FRANKLIN-
620 PM CDT SUN AUG 7 2011

...SIGNIFICANT WEATHER ADVISORY FOR FRANKLIN COUNTY UNTIL 700 PM
CDT...

AT 619 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR HALLTOWN...OR NEAR RED BAY...MOVING
SOUTHEAST AT 30 MPH. THIS THUNDERSTORM IS IN THE PROCESS OF
COLLAPSING...AND WILL BE CAPABLE OF STRONG GUSTY OUTFLOW WINDS
SEVERAL MINUTES BEFORE HEAVY RAINFALL OCCURS.

NICKEL SIZE HAIL...WINDS UP TO 50 MPH...FREQUENT CLOUD TO GROUND
LIGHTNING...AND HEAVY DOWNPOURS ARE EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  HALLTOWN.
  VINA.
  DEMPSEY.
  ATWOOD.
  BELGREEN...HODGES.
  DUKETON...ROCKWOOD.

REMEMBER...IF YOU CAN HEAR THUNDER...YOU ARE CLOSE ENOUGH TO THE
STORM TO BE STRUCK BY LIGHTNING. SEEK SAFE SHELTER IMMEDIATELY.

STAY TUNED TO NOAA WEATHER RADIO...COMMERCIAL RADIO...OR YOUR LOCAL
TELEVISION STATIONS FOR LATER STATEMENTS AND POSSIBLE WARNINGS
CONCERNING THIS WEATHER SITUATION.

&&

LAT...LON 3458 8815 3459 8814 3457 8797 3458 8788
      3455 8770 3431 8770 3431 8811 3433 8818
TIME...MOT...LOC 2320Z 298DEG 25KT 3449 8808

CA

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 7, 7:20 PM CDT	Special Weather Statement	HUN	Cullman, Morgan	40 min
Aug 7, 7:50 PM CDT	Special Weather Statement	HUN	Cullman	40 min
Aug 7, 8:38 PM CDT	Special Weather Statement	HUN	Jackson	52 min
Aug 7, 8:56 PM CDT	Special Weather Statement	HUN	Franklin	49 min
Aug 8, 2:18 AM CDT	Special Weather Statement	HUN	Colbert	57 min
Aug 8, 3:00 AM CDT	Heat Advisory	HUN	Colbert, Franklin, Lauderdale, Lawrence	12 hr
Aug 8, 4:43 AM CDT	Special Weather Statement	HUN	Cullman	47 min
Aug 8, 12:44 PM CDT	Special Weather Statement	HUN	Franklin, Lawrence	46 min
Aug 8, 1:30 PM CDT	Special Weather Statement	HUN	Lauderdale	45 min
Aug 8, 1:36 PM CDT	Special Weather Statement	HUN	Lawrence, Morgan	39 min
Aug 8, 1:51 PM CDT	Severe Thunderstorm Warning	HUN	Colbert, Lauderdale	54 min
Aug 8, 1:56 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Morgan	64 min
Aug 8, 2:06 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Lawrence, Morgan	54 min
Aug 8, 2:14 PM CDT	Special Weather Statement	HUN	Limestone	31 min
Aug 8, 2:30 PM CDT	Severe Thunderstorm Warning	HUN	Limestone, Morgan	44 min
Aug 8, 2:39 PM CDT	Severe Thunderstorm Warning	HUN	Lauderdale, Lawrence, Limestone	66 min
Aug 8, 2:43 PM CDT	Severe Thunderstorm Warning	HUN	Limestone, Madison	62 min
Aug 8, 2:52 PM CDT	Severe Thunderstorm Warning	HUN	Madison, Marshall, Morgan	53 min
Aug 8, 3:03 PM CDT	Flash Flood Warning	HUN	Colbert, Lauderdale	117 min
Aug 8, 3:05 PM CDT	Special Weather Statement	HUN	Cullman	25 min
Aug 8, 3:17 PM CDT	Severe Thunderstorm Warning	HUN	Limestone, Madison	58 min
Aug 8, 3:18 PM CDT	Flash Flood Warning	HUN	Cullman, Marshall, Morgan	118 min
Aug 8, 3:24 PM CDT	Flash Flood Warning	HUN	Lauderdale, Limestone, Madison, Morgan	2 hr
Aug 8, 3:34 PM CDT	Severe Thunderstorm Warning	HUN	Jackson, Madison	56 min
Aug 8, 3:49 PM CDT	Flash Flood Warning	HUN	Jackson, Madison, Marshall	101 min
Aug 8, 4:10 PM CDT	Severe Thunderstorm Warning	HUN	DeKalb, Jackson	65 min
Aug 8, 4:17 PM CDT	Flash Flood Warning	HUN	DeKalb, Jackson	116 min
Aug 8, 4:54 PM CDT	Special Weather Statement	HUN	Cullman	36 min
Aug 8, 5:29 PM CDT	Areal Flood Warning	HUN	Limestone, Madison, Morgan	2 hr

Nearby

Severe Thunderstorm Warnings in Alabama, 2011 Every severe thunderstorm warning in 2011

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.