Alert archive / Alabama / Special Weather Statements in 2011
Special Weather Statement, NWS Birmingham, AL
NWS Birmingham, AL issued this special weather statement at Nov 22, 2011, 2:08 PM CST for Tuscaloosa County, Alabama. It was in force for 37 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
- Nov 22, 2011, 2:08 PM CST (20:08 UTC)
- Expired
- Nov 22, 2011, 2:45 PM CST
- In force
- 37 min
- Issued by
- NWS Birmingham, AL
County Tuscaloosa County, AL
The radar
The Birmingham radar (KBMX), 69 km from the middle of the area, began a volume at 20:11 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, 8.1 hours before the alert went out and 68 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1114 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 197 m²/s²
- 0-3 km storm-relative helicity
- 207 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>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 Nov 22, 11:48 AM CST, 2 hours 20 minutes earlier.
Area forecast discussion, Nov 22, 11:48 AM CST, 2 hours 20 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BIRMINGHAM AL 1148 AM CST TUE NOV 22 2011 .UPDATE... 18Z AVIATION. && .DISCUSSION... LARGE BAND OF SHOWERS AND THUNDERSTORMS TO ALABAMA'S NORTH AND WEST APPEARED TO BE LOCATED WELL AHEAD OF ACTUAL SURFACE COLD FRONT. THE PORTION THAT WAS IN NORTHERN MISSISSIPPI LOOKED RELATIVELY WEAK THIS MORNING...AND MESOSCALE PARAMETERS ON SPC'S PAGE SUGGESTED THAT THIS CONVECTION WAS STARVED OF SURFACE-BASED INSTABILITY. FAIRLY WARM CLOUD TOPS AND RELATIVE LACK OF LIGHTNING ALSO SUPPORTS THE IDEA THAT THE NORTHERN MISSISSIPPI INTO NORTHWESTERN ALABAMA STORMS LACK THE UPDRAFT STRENGTH TO SUPPORT ORGANIZED SEVERE STORMS -- AT LEAST IN THE NEAR TERM. THOSE SHOWERS/AND STORMS WILL LIKELY JUST END UP BECOMING THE NORTHWESTERN BOUNDARY OF THE EVENTUAL SEVERE WEATHER THREAT AREA. MEANING...ONCE THE LEADING EDGE OF THAT RAIN GOES THROUGH AN AREA...ANY SEVERE WEATHER THREAT (HOWEVER MARGINAL) WOULD MOST LIKELY END. FARTHER TO THE SOUTH...CONDITIONS ARE A BIT MORE MOIST AND UNSTABLE. SEVERAL LOCATIONS IN THE SOUTHERN HALF OF MISSISSIPPI HAVE DEW POINTS OF 65 PLUS...WITH SBCAPES (FROM THE SPC MESOSCALE ANALYSIS PAGE) INCHING ABOVE 500 J/KG. IT IS THIS AREA THAT I FEEL WE NEED TO WATCH OVER THE NEXT SEVERAL HOURS...AS ANY STORMS THAT DEVELOP THEIR WOULD MOST LIKELY MOVE INTO CENTRAL ALABAMA. BEING FARTHER SOUTH... THESE STORMS (IF THEY DEVELOP) WOULD BE A BIT MORE SEPARATED FROM THE MAIN SURFACE LOW AND THE SLIGHTLY BETTER LOW LEVEL WIND SHEAR. BUT IF A SECONDARY SURFACE LOW WERE ABLE TO DEVELOP ALONG THE ADVANCING FRONT...THEN THIS COULD TIP THE SCALES ON THE SHEAR... ALLOWING FOR BETTER STORM ORGANIZATION. A QUICK LOOK AT THE 12Z NAM SUGGESTS THAT FROM I-59 EASTWARD...THE TIMING OF THE THUNDERSTORM THREAT IS NOT CHANGED ALL THAT MUCH FROM THE PREVIOUS THINKING. ALL IN ALL...WE COULD PROBABLY CURRENTLY CHARACTERIZE THE SEVERE WEATHER THREAT AS "MARGINAL" AT THIS POINT. BUT IT IS CERTAINLY SOMETHING THAT COULD EVOLVE INTO SOMETHING A BIT MORE SUBSTANTIAL IF A COUPLE OF KEY THINGS WERE TO HAPPEN (ADDED MOISTURE ADVECTING FROM THE SOUTH...AND THE DEVELOPMENT OF A SECONDARY SURFACE LOW WHICH WOULD ENHANCE LOW LEVEL WINDS AND SHEAR). OBVIOUSLY...WE WILL NEED TO WATCH THINGS CLOSELY OVER THE NEXT 2 TO 4 HOURS. /61/ && .AVIATION... 18Z TAF DISCUSSION. FAIRLY COMPLICATED FORECAST FOR THIS AFTN AND TONIGHT AS A COLD FRONT WILL APPROACH FROM THE WEST AND PUSH THRU THE AREA OVERNIGHT. OUTFLOW BOUNDARY FROM THIS MORNING'S CONVECTION IS ALREADY PUSHING THRU THE NWRN COUNTIES. EXPECT MAINLY RAIN SHOWERS BEHIND THE BOUNDARY...WITH SCT TO NUMEROUS SHOWERS/STORMS DEVELOPING THIS AFTN AND EVNG SOUTH OF THE BOUNDARY. MAIN THREATS WITH THE STORMS WILL BE STRONG WINDS AND POSSIBLY AN ISOLATED TORNADO. WINDS WILL GENERALLY BE FROM THE SSW TODAY AND WILL BE GUSTY AT TIMES. STRONGER GUSTS ARE LIKELY WITH THE PASSAGE OF STORMS AS WELL AS BEHIND THE COLD FRONT. AS FOR CIGS...THEY HAVE BEEN ALL OVER THE PLACE AND WILL LIKELY CONTINUE TO FLUCTUATE THRU THE REMAINDER OF THE DAY. EXPECT GENERALLY IFR/MVFR CIGS THIS AFTN...WITH CIGS LOWERING TO POSSIBLY IFR THIS EVNG AND OVERNIGHT AS A LOW STRATUS DECK MOVES IN BEHIND THE EXITING COLD FRONT. LOOK FOR CONTINUOUS UPDATES TO TIMING OF HEAVIEST PRECIP/STORMS THROUGHOUT THE AFTN. CHANGES TO CIG FORECASTS WILL LIKELY BE NEEDED AS WELL AS CONFIDENCE REMAINS LOW AT THIS TIME. 19 && .BMX WATCHES/WARNINGS/ADVISORIES... NONE. &&
Hazardous weather outlook, Nov 22, 12:20 PM CST, 1 hour 48 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE BIRMINGHAM AL 1220 PM CST TUE NOV 22 2011 ALZ011>015-017>050-231045- AUTAUGA-BARBOUR-BIBB-BLOUNT-BULLOCK-CALHOUN-CHAMBERS-CHEROKEE- CHILTON-CLAY-CLEBURNE-COOSA-DALLAS-ELMORE-ETOWAH-FAYETTE-GREENE-HALE- JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-PERRY- PICKENS-PIKE-RANDOLPH-RUSSELL-SHELBY-ST CLAIR-SUMTER-TALLADEGA- TALLAPOOSA-TUSCALOOSA-WALKER-WINSTON- 1220 PM CST TUE NOV 22 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM. .DAY ONE...THIS AFTERNOON AND TONIGHT. A LINE OF THUNDERSTORMS WILL AFFECT AREAS NEAR AND WEST OF A CULLMAN...CLANTON...SELMA LINE THROUGH 4 PM. THIS LINE OF STORMS WILL CONTAIN DAMAGING...STRAIGHT LINE WINDS ON ITS LEADING EDGE. IN ADDITION...A FEW SUPERCELL THUNDERSTORMS MAY DEVELOP AHEAD OF THE LINE...WHICH MAY PRODUCE ISOLATED TORNADOES. THE LINE OF STORMS WILL AFFECT AREAS NEAR AND EAST OF INTERSTATE 65 BETWEEN 4 PM AND MIDNIGHT... BUT A FEW SUPERCELLS MAY DEVELOP ACROSS THIS AREA AS EARLY AS 2 PM. THE THREAT OF SEVERE WEATHER WILL END WITH THE PASSAGE OF THE LINE OF STORMS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY. NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .SPOTTER INFORMATION STATEMENT... ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT WILL BE NECESSARY FOR AREAS WEST OF I-65 UNTIL 6 PM...AND FOR AREAS EAST OF I-65 BETWEEN 4 PM AND MIDNIGHT. STEFKOVICH
In the hours before
Special weather statement, Nov 22, 2:08 PM CST, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
208 PM CST TUE NOV 22 2011
ALZ013-022-023-222045-
FAYETTE AL-PICKENS AL-TUSCALOOSA AL-
208 PM CST TUE NOV 22 2011
...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN TUSCALOOSA...
NORTHEASTERN PICKENS AND SOUTHEASTERN FAYETTE COUNTIES UNTIL 245 PM
CST...
AT 209 PM CST...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR GORDO...MOVING NORTHEAST AT 55 MPH.
WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH
HEAVY RAIN.
LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
LAKE LURLEEN STATE PARK...
LAKE TUSCALOOSA BINION CREEK LANDING...
SAMANTHA...
BANKHEAD LOCK AND DAM...
BROWNVILLE...
THIS STORM MAY INTENSIFY....AND A TORNADO WATCH IS IN EFFECT FOR THIS
AREA. BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS
LOCAL CABLE TV OUTLETS....FOR ADDITIONAL INFORMATION AND POSSIBLE
WARNINGS FROM THE NATIONAL WEATHER SERVICE.
TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND
UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED
ROADWAY.
&&
LAT...LON 3366 8742 3360 8742 3359 8732 3352 8732
3351 8726 3350 8727 3350 8729 3348 8729
3349 8733 3346 8734 3344 8729 3340 8725
3324 8789 3348 8795
TIME...MOT...LOC 2009Z 243DEG 49KT 3337 8782
19The office that day
Everything else NWS Birmingham, AL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 22, 1:27 PM CST | Severe Thunderstorm Warning | BMX | Greene, Pickens, Sumter | 48 min |
| Nov 22, 2:13 PM CST | Severe Thunderstorm Warning | BMX | Greene, Hale, Marengo, Pickens, Sumter, Tuscaloosa | 47 min |
| Nov 22, 2:59 PM CST | Special Weather Statement | BMX | Bibb, Hale, Jefferson, Perry, Shelby | 46 min |
Nearby
Special Weather Statements in Alabama, 2011Every special weather statement 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.