Alert archive / Alabama / Tornado Warnings in 2011

Tornado Warning 36, NWS Birmingham, AL

April 11, 2011Greene County, Pickens County, Tuscaloosa County, Alabama

NWS Birmingham, AL issued this tornado warning at Apr 11, 2011, 6:08 PM CDT for Greene County, Pickens County, Tuscaloosa County, Alabama. It was in force for 37 min. 2 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Apr 11, 2011, 6:08 PM CDT (23:08 UTC)
Expired: Apr 11, 2011, 6:45 PM CDT
In force: 37 min
Issued by: NWS Birmingham, AL
Area: Storm-based polygon

Counties Greene County, AL, Pickens County, AL, Tuscaloosa County, AL

The radar

The Birmingham radar (KBMX), 58 km from the middle of the area, began a volume at 23:08 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.

What was reported inside it

Time	Report	Where	Remark
Apr 11, 6:30 PM CDT	TSTM WND DMG	Coker, AL	TREES DOWN ALONG SIPSEY VALLEY ROAD, COUNTY ROAD 140, PATE ROAD,ROMULUS ROAD, AND SAM SUTTON ROAD.
Apr 11, 6:31 PM CDT	TSTM WND DMG	6 W Northport, AL	TREES DOWN ALONG SIPSEY VALLEY ROAD AND COUNTY ROAD 140.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

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

Issued	Product	Office	Lasted
Apr 11, 4:05 PM CDT	Tornado Watch	SPC	6 hr

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 11.1 hours before the alert went out and 57 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: 9 J/kg
Mixed-layer CIN: -684 J/kg
Mixed-layer LCL: 606 m above ground
0-6 km bulk shear: 43 kt
0-1 km storm-relative helicity: 109 m²/s²
0-3 km storm-relative helicity: 179 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

169 
WFUS54 KBMX 112308
TORBMX
ALC063-107-125-112345-
/O.NEW.KBMX.TO.W.0036.110411T2308Z-110411T2345Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE BIRMINGHAM AL
608 PM CDT MON APR 11 2011

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A

* TORNADO WARNING FOR...
  NORTH CENTRAL GREENE COUNTY IN WEST CENTRAL ALABAMA...
  EAST CENTRAL PICKENS COUNTY IN WEST CENTRAL ALABAMA...
  SOUTHERN TUSCALOOSA COUNTY IN WEST CENTRAL ALABAMA...

* UNTIL 645 PM CDT

* AT 606 PM CDT...THE NATIONAL WEATHER SERVICE INDICATED A SEVERE
  THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM
  WAS LOCATED NEAR BENEVOLA...OR 11 MILES SOUTHEAST OF CARROLLTON...
  AND MOVING EAST AT 55 MPH.

* LOCATIONS IMPACTED INCLUDE...
  NORTHPORT...TUSCALOOSA...HOLT...JENA...COKER...BRYANT DENNY
  STADIUM...MCFARLAND MALL...UNIVERSITY MALL...DEERLICK CREEK
  CAMPGROUNDS AND LAKE WILDWOOD.

THIS INCLUDES...
INTERSTATE 20 EXIT NUMBERS 62 THROUGH 89...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF A STURDY BUILDING.

&&

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

LAT...LON 3332 8717 3321 8716 3320 8718 3314 8719
      3314 8728 3308 8732 3305 8802 3323 8804
TIME...MOT...LOC 2309Z 265DEG 46KT 3315 8791

$$

GOGGINS

2 follow-up statements

819 
WWUS54 KBMX 112318
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
618 PM CDT MON APR 11 2011

ALC063-107-125-112345-
/O.CON.KBMX.TO.W.0036.000000T0000Z-110411T2345Z/
GREENE AL-PICKENS AL-TUSCALOOSA AL-
618 PM CDT MON APR 11 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN TUSCALOOSA...EAST
CENTRAL PICKENS AND EXTREME NORTH CENTRAL GREENE COUNTIES UNTIL 645
PM CDT...

AT 615 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR JENA...OR 13 MILES SOUTHEAST OF GORDO...MOVING
EAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...
  NORTHPORT...TUSCALOOSA...HOLT...COKER...BRYANT DENNY STADIUM...
  MCFARLAND MALL...UNIVERSITY MALL...DEERLICK CREEK CAMPGROUNDS...
  LAKE WILDWOOD AND COALING.

THIS INCLUDES...
INTERSTATE 20 EXIT NUMBERS 62 THROUGH 89...

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

LAT...LON 3324 8790 3332 8717 3323 8716 3322 8716
      3320 8718 3314 8719 3314 8728 3308 8732
      3306 8790
TIME...MOT...LOC 2318Z 265DEG 46KT 3316 8777

$$

GOGGINS

996 
WWUS54 KBMX 112332
SVSBMX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
632 PM CDT MON APR 11 2011

ALC063-107-112342-
/O.CAN.KBMX.TO.W.0036.000000T0000Z-110411T2345Z/
GREENE AL-PICKENS AL-
632 PM CDT MON APR 11 2011

...THE TORNADO WARNING FOR EAST CENTRAL PICKENS AND EXTREME NORTH
CENTRAL GREENE COUNTIES IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

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

LAT...LON 3332 8717 3323 8716 3322 8716 3318 8719
      3314 8719 3314 8728 3308 8732 3307 8770
      3326 8771
TIME...MOT...LOC 2332Z 265DEG 46KT 3317 8756

$$

ALC125-112345-
/O.CON.KBMX.TO.W.0036.000000T0000Z-110411T2345Z/
TUSCALOOSA AL-
632 PM CDT MON APR 11 2011

...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHERN TUSCALOOSA COUNTY
UNTIL 645 PM CDT...

AT 629 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO.  THIS DANGEROUS
STORM WAS LOCATED NEAR BRYANT DENNY STADIUM...OR 5 MILES SOUTH OF
NORTHPORT...MOVING EAST AT 55 MPH.

LOCATIONS IMPACTED INCLUDE...
  TUSCALOOSA...HOLT...MCFARLAND MALL...UNIVERSITY MALL...DEERLICK
  CREEK CAMPGROUNDS...LAKE WILDWOOD...COALING...BEVILLE LOCK AND
  DAM...BROOKWOOD AND VANCE.

THIS INCLUDES...
INTERSTATE 20 EXIT NUMBERS 62 THROUGH 89...

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

LAT...LON 3332 8717 3323 8716 3322 8716 3318 8719
      3314 8719 3314 8728 3308 8732 3307 8770
      3326 8771
TIME...MOT...LOC 2332Z 265DEG 46KT 3317 8756

$$

27

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 11, 3:52 AM CDT	Wind Advisory	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Calhoun and 33 more	20 hr
Apr 11, 5:12 PM CDT	Special Weather Statement	BMX	Fayette, Lamar, Marion, Winston	48 min
Apr 11, 5:36 PM CDT	Severe Thunderstorm Warning	BMX	Greene, Pickens, Sumter, Tuscaloosa	39 min
Apr 11, 5:42 PM CDT	Tornado Warning	BMX	Fayette, Walker	22 min
Apr 11, 6:13 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Greene, Jefferson, Pickens, Tuscaloosa	47 min
Apr 11, 6:17 PM CDT	Special Weather Statement	BMX	Blount, Walker	43 min
Apr 11, 6:38 PM CDT	Tornado Warning	BMX	Bibb, Tuscaloosa	29 min
Apr 11, 6:43 PM CDT	Tornado Warning	BMX	Greene, Hale	15 min
Apr 11, 6:43 PM CDT	Tornado Warning	BMX	Bibb, Hale, Tuscaloosa	14 min
Apr 11, 6:48 PM CDT	Severe Thunderstorm Warning	BMX	Bibb, Chilton, Dallas, Greene, Hale, Jefferson and 5 more	57 min
Apr 11, 6:52 PM CDT	Tornado Warning	BMX	Blount	38 min
Apr 11, 6:53 PM CDT	Tornado Warning	BMX	Jefferson, Tuscaloosa	52 min

Nearby

Tornado Warnings in Alabama, 2011 Every tornado warning in 2011 Tornadoes 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.