Alert archive / Alabama / Severe Thunderstorm Warnings in 2011

Severe Thunderstorm Warning 4, NWS Birmingham, AL

January 1, 20115 counties in Alabama

NWS Birmingham, AL issued this severe thunderstorm warning at Jan 1, 2011, 4:13 AM CST for 5 counties in Alabama. It was in force for 47 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: Jan 1, 2011, 4:13 AM CST (10:13 UTC)
Expired: Jan 1, 2011, 5:00 AM CST
In force: 47 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Fayette County, AL, Greene County, AL, Pickens County, AL, Sumter County, AL, Tuscaloosa County, AL

The radar

The Columbus AFB radar (KGWX), 106 km from the middle of the area, began a volume at 10:15 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Jan 1, 3:10 AM CST	Tornado Watch	SPC	7 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 00:00Z, 10.2 hours before the alert went out and 129 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: 1020 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 270 m²/s²
0-3 km storm-relative helicity: 398 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

653 
WUUS54 KBMX 011013
SVRBMX
ALC057-063-107-119-125-011100-
/O.NEW.KBMX.SV.W.0004.110101T1013Z-110101T1100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
413 AM CST SAT JAN 1 2011

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN FAYETTE COUNTY IN WEST CENTRAL ALABAMA...
  GREENE COUNTY IN WEST CENTRAL ALABAMA...
  PICKENS COUNTY IN WEST CENTRAL ALABAMA...
  NORTHWESTERN SUMTER COUNTY IN WEST CENTRAL ALABAMA...
  WESTERN TUSCALOOSA COUNTY IN WEST CENTRAL ALABAMA...

* UNTIL 500 AM CST

* AT 410 AM CST...THE NATIONAL WEATHER SERVICE INDICATED A LINE OF
  SEVERE THUNDERSTORMS CAPABLE OF PRODUCING DESTRUCTIVE WINDS IN
  EXCESS OF 70 MPH.  THESE STORMS WERE LOCATED ALONG A LINE EXTENDING
  FROM ASHCRAFT CORNER TO 6 MILES WEST OF BOYD...AND MOVING NORTHEAST
  AT 35 MPH.

* LOCATIONS IMPACTED INCLUDE...
  GORDO...EUTAW...WEST UNION...EMELLE...NEW WEST GREENE...
  GAINESVILLE...WEST GREENE AND BENEVOLA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

TO REPORT SEVERE WEATHER...
CALL 1-800-856-0758.

LAT...LON 3272 8838 3292 8836 3358 8792 3368 8743
      3277 8788 3262 8839 3264 8840
TIME...MOT...LOC 1012Z 240DEG 32KT 3354 8783 3265 8839

$$

61

1 follow-up statement

735 
WWUS54 KBMX 011023
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
423 AM CST SAT JAN 1 2011

ALC057-063-107-119-125-011100-
/O.CON.KBMX.SV.W.0004.000000T0000Z-110101T1100Z/
SUMTER AL-GREENE AL-PICKENS AL-TUSCALOOSA AL-FAYETTE AL-
423 AM CST SAT JAN 1 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR SOUTHEASTERN
FAYETTE...WESTERN TUSCALOOSA...SOUTHEASTERN PICKENS...GREENE AND
NORTHWESTERN SUMTER COUNTIES UNTIL 500 AM CST...

AT 419 AM CST...A LINE OF SEVERE THUNDERSTORMS WAS BEING 
MONITORED...PRODUCING  DAMAGING WINDS IN EXCESS OF 60 MPH.  THESE 
STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES SOUTH OF 
BERRY TO 7 MILES NORTHWEST OF JENA TO JENA TO 6 MILES WEST OF EUTAW 
TO EMELLE...MOVING NORTHEAST AT 60 MPH.

LOCATIONS IMPACTED INCLUDE...
  EUTAW...BOLEY SPRINGS...KNOXVILLE...COKER...LAKE LURLEEN STATE
  PARK...SAMANTHA...BOLIGEE...LAKE TUSCALOOSA BINION CREEK LANDING...
  ALLISON AND SUMTERVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A TORNADO WATCH REMAINS IN EFFECT FOR THE WARNED AREA. TORNADOES CAN
DEVELOP QUICKLY FROM SEVERE THUNDERSTORMS. ALTHOUGH NOT IMMEDIATELY
LIKELY...IF A TORNADO IS SPOTTED ACT QUICKLY AND MOVE TO A PLACE OF
SAFETY INSIDE A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THESE STORMS...AND MAY
LEAD TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

&&

TO REPORT SEVERE WEATHER...CALL 1-800-856-0758.

LAT...LON 3272 8838 3297 8825 3297 8812 3324 8802
      3332 8792 3361 8779 3368 8743 3277 8788
      3262 8839 3264 8840
TIME...MOT...LOC 1022Z 236DEG 52KT 3360 8759 3324 8785
          3312 8780 3289 8794 3270 8827

$$

17/KLAWS

The office that day

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

Issued	Product	Office	Counties	Lasted
Dec 31, 8:43 PM CST	Special Weather Statement	BMX	Pickens	47 min
Dec 31, 11:15 PM CST	Areal Flood Advisory	BMX	Marion, Walker, Winston	3 hr
Jan 1, 12:28 AM CST	Wind Advisory	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	9 hr
Jan 1, 12:57 AM CST	Severe Thunderstorm Warning	BMX	Marion, Winston	33 min
Jan 1, 1:17 AM CST	Flash Flood Warning	BMX	Fayette, Lamar, Marion, Walker, Winston	4 hr
Jan 1, 1:53 AM CST	Severe Thunderstorm Warning	BMX	Fayette, Lamar, Marion	37 min
Jan 1, 2:26 AM CST	Tornado Warning	BMX	Fayette, Lamar, Marion, Walker	34 min
Jan 1, 2:27 AM CST	Tornado Warning	BMX	Pickens	48 min
Jan 1, 3:10 AM CST	Tornado Warning	BMX	Pickens, Tuscaloosa	35 min
Jan 1, 3:36 AM CST	Flash Flood Watch	BMX	Etowah, St. Clair	8 hr
Jan 1, 3:37 AM CST	Flash Flood Warning	BMX	Fayette, Pickens, Tuscaloosa, Walker, Winston	3 hr
Jan 1, 3:37 AM CST	Severe Thunderstorm Warning	BMX	Greene, Pickens, Sumter	38 min
Jan 1, 4:36 AM CST	Severe Thunderstorm Warning	BMX	Bibb, Blount, Greene, Hale, Jefferson, Marengo and 3 more	39 min
Jan 1, 5:27 AM CST	Severe Thunderstorm Warning	BMX	Bibb, Greene, Hale, Perry, Sumter, Tuscaloosa	48 min
Jan 1, 5:46 AM CST	Areal Flood Advisory	BMX	Tuscaloosa	3 hr
Jan 1, 9:29 AM CST	River Flood Warning	BMX	Greene, Hale, Marengo, Pickens, Sumter	24 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.