Alert archive / Alabama / Special Weather Statements in 2011

Special Weather Statement, NWS Birmingham, AL

October 13, 2011Lee County, Alabama

NWS Birmingham, AL issued this special weather statement at Oct 13, 2011, 11:53 AM CDT for Lee County, Alabama. It was in force for 67 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: Oct 13, 2011, 11:53 AM CDT (16:53 UTC)
Expired: Oct 13, 2011, 1:00 PM CDT
In force: 67 min
Issued by: NWS Birmingham, AL

County Lee County, AL

The nearest sounding before it

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 4.9 hours before the alert went out and 111 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: 314 J/kg
Mixed-layer CIN: 0 J/kg
Mixed-layer LCL: 461 m above ground
0-6 km bulk shear: 38 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

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

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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 Oct 13, 11:41 AM CDT, 12 minutes earlier.

Area forecast discussion, Oct 13, 11:41 AM CDT, 12 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1141 AM CDT THU OCT 13 2011

.UPDATE...

&&

.DISCUSSION...

UPPER LEVEL TROF AND A SURFACE COLD FRONT WILL CONTINUE TO
GENERATE SCATTERED SHOWERS AND EMBEDDED THUNDERSTORMS THIS
AFTERNOON ACROSS CENTRAL ALABAMA. GOOD NEWS IN REGARDS TO SEVERE
POTENTIAL IS THAT THE AIRMASS HAS REMAINED STABLE WITH ALL THE
CLOUD COVER THIS MORNING...KEEPING THE TEMPERATURES AND
INSTABILITY IN CHECK. THE MAIN FRONT IS APPROACHING WEST-CENTRAL
ALABAMA AT THIS TIME AND WILL QUICKLY MOVE THROUGH THE AREA THIS
AFTERNOON AND TONIGHT. LOOK FOR SHOWERS AND THUNDERSTORMS TO
DISSIPATE FROM THE WEST TO EAST. MADE SOME ADJUSTMENTS DOWNWARD IN
REGARDS TO TEMPERATURES...ESPECIALLY ACROSS THE SOUTHEAST.
FORECAST HAVE BEEN SENT.

&&

.AVIATION...
12Z TAF DISCUSSION.

EXPECT A FEW SHOWERS TO CONTINUE TO PUSH EAST ACROSS THE NRN TWO
THIRDS OF THE CWA THIS MRNG. COULD SEE SOME ADDITIONAL SCATTERED
SHOWER/STORM DEVELOPMENT LATE MRNG AND EARLY AFTN AHEAD OF THE COLD
FRONT. HAVE INCLUDED VCTS FOR ALL SITES EXCEPT MGM/TOI AS RAIN
CHANCES REMAIN A LITTLE LOWER IN THE SOUTH. WINDS COULD BE A TAD
GUSTY JUST BEFORE AND AS THE FRONT PASSES...BUT GUSTS SHOULD BE AT
OR BELOW 18 KTS.

AS FAR AS CIGS GO...CONFIDENCE REMAINS ON THE LOW END AS THEY HAVE
BEEN VARIABLE ALL NIGHT. GENERALLY EXPECT CIGS TO RISE TO JUST
INSIDE VFR BY LATE MRNG...HOWEVER THERE COULD STILL BE SOME SCT MVFR
CIGS POSSIBLE. THE FRONT WILL PUSH THRU DURING THE AFTN AND SKIES
SHOULD BEGIN TO CLEAR IN THE EVNG. DRIER AIR WILL FILTER INTO THE
REGION OVERNIGHT SO FOG DEVELOPMENT IS NOT ANTICIPATED.

NOTE...THE NATIONAL WEATHER SERVICE HAS BEGUN SEASONAL TERMINAL
FORECAST FOR THE TALLADEGA MUNICIPAL AIRPORT (KASN) IN TALLADEGA...
ALABAMA. THE FORECASTS WILL LAST THROUGH AT LEAST THE 26TH OF
OCTOBER. DUE TO THE LIMITED AVAILABILITY OF OBSERVATIONS...KASN TAF
WILL HAVE AMD NOT SKED AT THE END.

19

&&

.FIRE WEATHER...

DRY CONDITIONS ARE EXPECTED FOR BOTH FRIDAY AND SATURDAY.
RELATIVE HUMIDITY VALUES COULD DROP BELOW 30 PERCENT FOR SEVERAL
HOURS. THIS COULD ENHANCE THE FIRE WEATHER THREAT ACROSS CENTRAL
ALABAMA.

&&

.PREV DISCUSSION... /ISSUED 635 AM CDT THU OCT 13 2011/

DISCUSSION...

HIGH PRESSURE WILL BUILD IN FROM THE WEST AND IT IS EXPECTED TO
REMAIN IN CONTROL THROUGH EARLY NEXT WEEK. TEMPERATURES WILL ONLY
COOL DOWN ON FRIDAY BUT THEY WILL QUICKLY REBOUND OVER THE
WEEKEND. NEVERTHELESS...SKIES WILL BE MAINLY CLOUD FREE.

ANOTHER COLD FRONT IS SET TO MOVE ACROSS CENTRAL ALABAMA ON
TUESDAY. NOT EXPECTING A WHOLE OF RAIN WITH THIS SYSTEM. SINCE
HIGH PRESSURE WILL REMAIN IN CONTROL FOR SO LONG...MOISTURE
RECOVERY WILL NOT OCCUR FAST ENOUGH BEFORE THE FRONT REACHES THE
AREA. THIS TIME AROUND...TEMPERATURES ARE EXPECTED TO BE MUCH
COOLER GIVEN THE TYPE OF AIRMASS. HIGH PRESSURE RETURNS FOR THE
LATTER HALF OF THE WEEK.

10/ARM

&&

.PRELIMINARY POINT TEMPS/POPS...
GADSDEN     71  50  76  46  77 /  60  20   0   0   0
ANNISTON    74  50  76  48  79 /  60  20   0   0   0
BIRMINGHAM  75  52  76  53  80 /  60  10   0   0   0
TUSCALOOSA  77  50  79  49  82 /  70   0   0   0   0
CALERA      76  51  77  52  80 /  60  10   0   0   0
AUBURN      73  54  76  55  81 /  60  20   0   0   0
MONTGOMERY  79  52  80  51  85 /  70  10   0   0   0
TROY        75  51  79  48  83 /  50  10   0   0   0

&&

.BMX WATCHES/WARNINGS/ADVISORIES...
NONE.

&&

16/10/19/10

Hazardous weather outlook, Oct 13, 6:40 AM CDT, 5 hours 13 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
640 AM CDT THU OCT 13 2011

ALZ011>015-017>050-141145-
MARION-LAMAR-FAYETTE-WINSTON-WALKER-BLOUNT-ETOWAH-CALHOUN-
CHEROKEE-CLEBURNE-PICKENS-TUSCALOOSA-JEFFERSON-SHELBY-ST. CLAIR-
TALLADEGA-CLAY-RANDOLPH-SUMTER-GREENE-HALE-PERRY-BIBB-CHILTON-
COOSA-TALLAPOOSA-CHAMBERS-MARENGO-DALLAS-AUTAUGA-LOWNDES-ELMORE-
MONTGOMERY-MACON-BULLOCK-LEE-RUSSELL-PIKE-BARBOUR-
640 AM CDT THU OCT 13 2011

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE COUNTIES SERVED BY THE
NATIONAL WEATHER SERVICE OFFICE IN BIRMINGHAM.

.DAY ONE...TODAY AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

DRIER AIR WILL BEGIN TO FILTER INTO THE REGION ON FRIDAY. THESE
DRY CONDITIONS COULD ENHANCE THE FIRE DANGER THREAT ACROSS PORTIONS
OF CENTRAL ALABAMA ON BOTH FRIDAY AND SATURDAY.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Local storm report, Oct 13, 11:52 AM CDT, 1 minute before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1152 AM CDT THU OCT 13 2011

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

1140 AM     HAIL             MONTGOMERY              32.35N 86.28W
10/13/2011  M0.25 INCH       MONTGOMERY         AL   TRAINED SPOTTER

            PEA SIZE HAIL AT INTERSECTION OF I-85 AND EASTERN
            BOULEVARD.

&&

Special weather statement, Oct 13, 11:53 AM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1153 AM CDT THU OCT 13 2011

ALZ037-043-045-047-048-131800-
ELMORE AL-LEE AL-MACON AL-RUSSELL AL-TALLAPOOSA AL-
1153 AM CDT THU OCT 13 2011

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN TALLAPOOSA...
NORTHERN RUSSELL...NORTHERN MACON...LEE AND SOUTHEASTERN ELMORE
COUNTIES UNTIL 100 PM CDT...

AT 1148 AM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR LIBERTY CITY...OR NEAR NOTASULGA...MOVING EAST AT
35 MPH.

PEA SIZE HAIL AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS
STORM.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  AUBURN...
  OPELIKA...
  SMITHS...
  PHENIX CITY...
  TUSKEGEE NATIONAL FOREST...

IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.

&&

LAT...LON 3235 8499 3241 8600 3272 8574 3274 8541
      3273 8529 3275 8528 3275 8512 3269 8511
      3265 8508 3265 8509 3237 8497
TIME...MOT...LOC 1653Z 266DEG 31KT 3255 8568

The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 13, 12:05 PM CDT	Severe Thunderstorm Warning	BMX	Lee, Macon, Russell	40 min
Oct 13, 1:37 PM CDT	Special Weather Statement	BMX	Bullock, Macon	53 min
Oct 13, 2:20 PM CDT	Special Weather Statement	BMX	Barbour, Bullock, Pike, Russell	55 min

Nearby

Special Weather Statements in Alabama, 2011 Every 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.