Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 81, NWS Huntsville, AL

April 15, 2011Cullman County, Alabama

NWS Huntsville, AL issued this severe thunderstorm warning at Apr 15, 2011, 6:40 PM CDT for Cullman County, Alabama. It was in force for 36 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: Apr 15, 2011, 6:40 PM CDT (23:40 UTC)
Expired: Apr 15, 2011, 7:16 PM CDT
In force: 36 min
Issued by: NWS Huntsville, AL
Area: Storm-based polygon

County Cullman County, AL

The radar

The Birmingham radar (KBMX), 107 km from the middle of the area, began a volume at 23:40 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 12:00Z, 11.7 hours before the alert went out and 106 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1553 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 282 m²/s²
0-3 km storm-relative helicity: 365 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.5

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 Apr 15, 6:15 PM CDT, 25 minutes earlier.

Area forecast discussion, Apr 15, 6:15 PM CDT, 25 minutes before

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Hazardous weather outlook, Apr 15, 4:46 PM CDT, 1 hour 54 minutes before

HAZARDOUS WEATHER OUTLOOK...UPDATED
NATIONAL WEATHER SERVICE HUNTSVILLE AL
446 PM CDT FRI APR 15 2011

ALZ001>010-016-TNZ076-096-097-160600-
LAUDERDALE-COLBERT-FRANKLIN AL-LAWRENCE-LIMESTONE-MADISON-MORGAN-
MARSHALL-JACKSON-DEKALB-CULLMAN-MOORE-LINCOLN-FRANKLIN TN-
446 PM CDT FRI APR 15 2011

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

.DAY ONE...TONIGHT...

ACTIVE WEATHER WILL PERSIST ACROSS THE TENNESSEE VALLEY THROUGH THIS
EVENING AS SHOWERS AND THUNDERSTORMS CONTINUE TO DEVELOP AHEAD OF A
SLOW MOVING COLD FRONT. ALTHOUGH THE STRONGEST STORMS HAVE REMAINED
SOUTH OF THE TENNESSEE VALLEY THROUGH MUCH OF THE DAY...THERE REMAINS
A THREAT OF SEVERE WEATHER WITH ANY STORMS THAT DEVELOP AHEAD OF THE
FRONT. THE PRIMARY THREAT WITH THESE STORMS WOULD BE LARGE HAIL AND
DAMAGING STRAIGHT LINE WINDS. HOWEVER...SUFFICIENT WIND SHEAR REMAINS
IN PLACE ACROSS THE REGION TO PRODUCE ISOLATED TORNADOES...ESPECIALLY
ACROSS WESTERN ALABAMA AND AREAS SOUTH OF THE TENNESSEE RIVER.

IN ADDITION...RAINFALL HAS ALREADY BEEN LOCALLY HEAVY ACROSS THE
TENNESSEE VALLEY TODAY WITH AMOUNTS OF 2 TO 3 INCHES IN SOME
LOCATIONS. ADDITIONAL RAINFALL WILL CAUSE A THREAT OF FLASH FLOODING
THROUGH THIS EVENING. THE ENTIRE SEVERE THREAT WILL LIKELY END
ACROSS NORTHWEST ALABAMA BETWEEN 9 PM AND 11 PM... NORTH CENTRAL
ALABAMA AND SOUTHERN MIDDLE TENNESSEE BETWEEN 10 PM AND
MIDNIGHT...AND NORTHEAST ALABAMA BETWEEN 11 PM AND 1 AM SATURDAY
MORNING.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY...

ANOTHER ROUND OF STORMS IS POSSIBLE ON WEDNESDAY INTO THURSDAY OF
NEXT WEEK AS ANOTHER COLD FRONT APPROACHES THE AREA.

.SPOTTER CALL TO ACTION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT PERSONNEL IS
LIKELY THIS AFTERNOON AND TONIGHT.

In the hours before

Local storm report, Apr 15, 4:17 PM CDT, 2 hours 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
417 PM CDT FRI APR 15 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0416 PM     FLASH FLOOD      HANCEVILLE              34.06N 86.76W
04/15/2011                   CULLMAN            AL   AMATEUR RADIO

            LARK STREET CLOSED

&&

Local storm report, Apr 15, 4:34 PM CDT, 2 hours 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
434 PM CDT FRI APR 15 2011

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0420 PM     FLASH FLOOD      5 ESE CHEROKEE          34.72N 87.88W
04/15/2011                   COLBERT            AL   AMATEUR RADIO

            WATER 6 INCHES DEEP ON PATRICK LANE

&&

Special weather statement, Apr 15, 4:36 PM CDT, 2 hours 4 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
436 PM CDT FRI APR 15 2011

ALZ001>004-152215-
COLBERT-FRANKLIN-LAUDERDALE-LAWRENCE-
436 PM CDT FRI APR 15 2011

...SIGNIFICANT WEATHER ADVISORY FOR COLBERT...FRANKLIN...LAUDERDALE
AND LAWRENCE COUNTIES UNTIL 515 PM CDT...

AT 436 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 6 MILES EAST OF
FLORENCE TO 9 MILES SOUTHWEST OF RUSSELLVILLE...MOVING EAST AT 35
MPH.

PEA SIZE HAIL...WINDS UP TO 50 MPH...AND HEAVY DOWNPOURS ARE EXPECTED
WITH THESE STORMS.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  CENTER STAR
  KINGTOWN...LEXINGTON.
  WHITEHEAD.
  ANDERSON...NE SMITH.
  MT HOPE.

THIS THUNDERSTORM COULD INTENSIFY QUICKLY...SO BE READY TO ACT IF A
WARNING IS ISSUED.

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 3501 8721 3431 8738 3432 8790 3502 8770
TIME...MOT...LOC 2136Z 254DEG 29KT 3483 8754 3440 8778

SL

Special weather statement, Apr 15, 5:29 PM CDT, 1 hour 11 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
529 PM CDT FRI APR 15 2011

ALZ007-016-152315-
CULLMAN-MORGAN-
529 PM CDT FRI APR 15 2011

...SIGNIFICANT WEATHER ADVISORY FOR CULLMAN AND MORGAN COUNTIES UNTIL
615 PM CDT...

AT 529 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR BATTLEGROUND...OR 11 MILES SOUTHWEST OF
HARTSELLE...MOVING NORTHEAST AT 55 MPH.

PEA SIZE HAIL...WINDS UP TO 50 MPH...AND HEAVY DOWNPOURS ARE EXPECTED
WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  LEESDALE...COLE SPRINGS.
  SOMERVILLE...PRICEVILLE.
  FLORETTE.
  VALHERMOSO SPRINGS.
  LACEYS SPRING.

THIS THUNDERSTORM COULD INTENSIFY QUICKLY...SO BE READY TO ACT IF A
WARNING IS ISSUED.

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 3419 8712 3440 8711 3458 8690 3455 8675
      3458 8672 3458 8667 3455 8666 3455 8663
      3457 8662 3457 8656 3454 8655 3449 8656
      3415 8704
TIME...MOT...LOC 2229Z 228DEG 47KT 3430 8700

SL

Special weather statement, Apr 15, 6:21 PM CDT, 19 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
621 PM CDT FRI APR 15 2011

ALZ007-016-160000-
CULLMAN-MORGAN-
621 PM CDT FRI APR 15 2011

...SIGNIFICANT WEATHER ADVISORY FOR CULLMAN AND SOUTHERN MORGAN
COUNTIES UNTIL 700 PM CDT...

AT 621 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM MASSEY TO ADDISON TO
NAUVOO...MOVING EAST AT 35 MPH.

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

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  LEESDALE...BATTLEGROUND.
  FALKVILLE.
  LACON...JONES CHAPEL.
  COLE SPRINGS...WEST POINT.
  CRANE HILL...LOGAN.

THESE THUNDERSTORMS COULD INTENSIFY QUICKLY...SO BE READY TO ACT IF A
WARNING IS ISSUED.

&&

LAT...LON 3395 8712 3436 8711 3443 8702 3448 8656
      3440 8658 3423 8679 3391 8691 3391 8692
      3387 8692
TIME...MOT...LOC 2321Z 263DEG 20KT 3438 8699 3419 8724
          3399 8739

DJN

Special weather statement, Apr 15, 6:39 PM CDT, 1 minute before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE HUNTSVILLE AL
639 PM CDT FRI APR 15 2011

ALZ001-002-160015-
COLBERT-LAUDERDALE-
639 PM CDT FRI APR 15 2011

...SIGNIFICANT WEATHER ADVISORY FOR COLBERT AND LAUDERDALE COUNTIES
UNTIL 715 PM CDT...

AT 636 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR OAKLAND...OR 10 MILES WEST OF
UNDERWOOD-PETERSVILLE...MOVING NORTHEAST AT 60 MPH.

PEA SIZE HAIL...HEAVY DOWNPOURS...AND WINDS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM.

* LOCATIONS IN OR NEAR THE PATH INCLUDE...
  CLOVERDALE...UNDERWOOD-PETERSVILLE.
  ZIP CITY.
  GREEN HILL.
  LEXINGTON.

SEEK SHELTER AND STAY AWAY FROM WINDOWS UNTIL THE STORM HAS PASSED.

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 3501 8727 3469 8788 3489 8806 3502 8796
TIME...MOT...LOC 2339Z 237DEG 50KT 3487 8783

SL

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 14, 10:12 PM CDT	Wind Advisory	HUN	Colbert, Cullman, DeKalb, Franklin, Jackson, Lauderdale and 5 more	23 hr
Apr 15, 6:59 AM CDT	Special Weather Statement	HUN	Colbert	31 min
Apr 15, 7:37 AM CDT	Special Weather Statement	HUN	Colbert, Lauderdale	23 min
Apr 15, 8:21 AM CDT	Special Weather Statement	HUN	Limestone	24 min
Apr 15, 8:34 AM CDT	Special Weather Statement	HUN	Marshall	26 min
Apr 15, 8:49 AM CDT	Special Weather Statement	HUN	Colbert	26 min
Apr 15, 8:55 AM CDT	Special Weather Statement	HUN	Franklin	35 min
Apr 15, 9:16 AM CDT	Special Weather Statement	HUN	Colbert, Lauderdale	29 min
Apr 15, 9:29 AM CDT	Special Weather Statement	HUN	Limestone	31 min
Apr 15, 10:08 AM CDT	Special Weather Statement	HUN	Limestone	37 min
Apr 15, 10:19 AM CDT	Special Weather Statement	HUN	Lawrence	26 min
Apr 15, 10:49 AM CDT	Special Weather Statement	HUN	Morgan	26 min
Apr 15, 10:52 AM CDT	Special Weather Statement	HUN	Madison	38 min
Apr 15, 11:01 AM CDT	Special Weather Statement	HUN	Cullman	29 min
Apr 15, 11:26 AM CDT	Special Weather Statement	HUN	Madison	49 min
Apr 15, 11:34 AM CDT	Special Weather Statement	HUN	Cullman	41 min
Apr 15, 11:39 AM CDT	Severe Thunderstorm Warning	HUN	Cullman	21 min
Apr 15, 11:43 AM CDT	Severe Thunderstorm Warning	HUN	Marshall	17 min
Apr 15, 12:22 PM CDT	Flash Flood Warning	HUN	Colbert, Lauderdale, Lawrence, Limestone	3 hr
Apr 15, 12:26 PM CDT	Severe Thunderstorm Warning	HUN	Cullman, Marshall	23 min
Apr 15, 12:33 PM CDT	Special Weather Statement	HUN	DeKalb	27 min
Apr 15, 12:45 PM CDT	Special Weather Statement	HUN	Marshall	45 min
Apr 15, 1:14 PM CDT	Flash Flood Warning	HUN	Cullman	6 hr
Apr 15, 1:18 PM CDT	Special Weather Statement	HUN	Jackson	42 min
Apr 15, 1:49 PM CDT	Severe Thunderstorm Warning	HUN	Lauderdale	26 min
Apr 15, 3:46 PM CDT	Severe Thunderstorm Warning	HUN	Franklin, Lawrence	29 min
Apr 15, 3:49 PM CDT	Flash Flood Warning	HUN	Colbert, Franklin, Lauderdale	4 hr
Apr 15, 4:05 PM CDT	Special Weather Statement	HUN	Colbert, Franklin, Lauderdale	25 min
Apr 15, 4:08 PM CDT	Severe Thunderstorm Warning	HUN	Lauderdale, Lawrence, Limestone	37 min
Apr 15, 4:36 PM CDT	Special Weather Statement	HUN	Franklin, Lauderdale	39 min
Apr 15, 5:29 PM CDT	Special Weather Statement	HUN	Morgan	46 min
Apr 15, 6:12 PM CDT	Severe Thunderstorm Warning	HUN	Colbert	33 min
Apr 15, 6:21 PM CDT	Special Weather Statement	HUN	Cullman	39 min
Apr 15, 6:39 PM CDT	Special Weather Statement	HUN	Lauderdale	36 min
Apr 15, 6:57 PM CDT	Special Weather Statement	HUN	Morgan	33 min
Apr 15, 9:04 AM CDT	Special Weather Statement	HUN	Lincoln	26 min

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.