Alert archive / Alabama / Special Weather Statements in 2012

Special Weather Statement, NWS Birmingham, AL

July 17, 2012Elmore County, Alabama

NWS Birmingham, AL issued this special weather statement at Jul 17, 2012, 1:08 PM CDT for Elmore 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: Jul 17, 2012, 1:08 PM CDT (18:08 UTC)
Expired: Jul 17, 2012, 1:45 PM CDT
In force: 37 min
Issued by: NWS Birmingham, AL

County Elmore County, AL

The nearest sounding before it

Birmingham, AL (KBMX), launched 12:00Z, 6.1 hours before the alert went out and 86 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: 1502 J/kg
Mixed-layer CIN: -51 J/kg
Mixed-layer LCL: 1108 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 3 m²/s²
0-3 km storm-relative helicity: 35 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.

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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 Jul 17, 12:33 PM CDT, 35 minutes earlier.

Area forecast discussion, Jul 17, 12:33 PM CDT, 35 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1233 PM CDT TUE JUL 17 2012

.UPDATE...FOR 18Z AVIATION.

&&

.DISCUSSION...

HIGH CLOUD COVER HAS KEPT ITS HOLD ACROSS THE EASTERN SECTIONS OF
THE AREA...AND WILL LIKELY CONTINUE THROUGHOUT THE REST OF THE
MORNING. SEVERAL BREAKS IN THIS CLOUD COVER ARE ALLOWING SOME AREAS
TO WARM UP AS EXPECTED. ISOLATED SHOWERS AND THUNDERSTORMS
DEVELOPED EARLIER THIS MORNING AND HAVE NOW DISSIPATED...LEAVING
WHAT APPEARS TO BE AN OUTFLOW BOUNDARY ACROSS THE SOUTHWEST...AS
SEEN ON THE VISIBLE SATELLITE. WITH THE CLOUD COVER...A DIFFERENTIAL
HEATING BOUNDARY IS LIKELY TO SET UP AND THIS COULD AID IN
CONVECTION THIS AFTERNOON. ALSO...WITH THE THUNDERSTORMS THAT
DEVELOPED THIS MORNING...OUTFLOW BOUNDARIES FROM THOSE STORMS MAY
ALSO HELP GET THINGS GOING. FOR THESE REASONS...HAVE INCREASED
POPS IN THE WEST. PREVIOUS FORECAST THINKING IS STILL ON TRACK
FOR OUR EASTERN COUNTIES...SO WILL NOT ADJUST THOSE POPS AT THIS
TIME. ALSO ADJUSTED HOURLY TEMPS AND DEWPOINTS TO ACCOUNT FOR
CURRENT TRENDS. UPDATES ARE OUT.

&&

.AVIATION...18Z TAF DISCUSSION.

THE ATMOSPHERE IS BECOMING INCREASINGLY UNSTABLE THIS AFTERNOON
AND SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS ARE BEGINNING
TO DEVELOP. THE MOST UNSTABLE AREAS APPEAR TO BE IN THE SOUTHEAST
NEAR MGM AND TOI AND DECIDED TO INCLUDE A TEMPO GROUP MENTIONING
THUNDERSTORMS FOR THE AFTERNOON. THAT SAID...ALL TAF SITES HAVE
THE POSSIBILITY OF THUNDERSTORMS...JUST GREATER IMPACT POTENTIAL
IN THE SOUTHEAST...AND KEPT VCTS WORDING FOR ALL SITES. WILL
MONITION AND FINE TUNE WITH AMENDMENTS...IF NEEDED...AS
THUNDERSTORMS CONTINUE TO DEVELOP AND APPROACH THE AIRPORTS. WINDS
GENERALLY FROM THE NORTHWEST AROUND 5 KTS EXCEPT IN THUNDERSTORM AREAS.
FOR TONIGHT...COVERAGE AND INTENSITY SHOULD DIMINISH AFTER SUNSET.

&&

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

&&

73/88

Hazardous weather outlook, Jul 17, 12:37 PM CDT, 31 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1237 PM CDT TUE JUL 17 2012

ALZ011>015-017>050-181745-
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-
1237 PM CDT TUE JUL 17 2012

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

ISOLATED SEVERE THUNDERSTORMS...WITH WIND GUSTS GREATER THAN 60
MPH...ARE POSSIBLE FROM NOON THROUGH 9 PM TODAY AREAWIDE.

.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 IS NOT
EXPECTED AT THIS TIME.

In the hours before

Special weather statement, Jul 17, 1:08 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
108 PM CDT TUE JUL 17 2012

ALZ041-043-171845-
AUTAUGA AL-ELMORE AL-
108 PM CDT TUE JUL 17 2012

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN AUTAUGA AND
SOUTHWESTERN ELMORE COUNTIES UNTIL 145 PM CDT...

AT 106 PM CDT...THE NATIONAL WEATHER SERVICE WAS TRACKING A STRONG
THUNDERSTORM NEAR DEATSVILLE...OR 8 MILES NORTH OF MILLBROOK...MOVING
SOUTHEAST AT 10 MPH.

WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH
HEAVY RAIN.

LOCATIONS IN OR NEAR THE PATH OF THIS STORM INCLUDE...
  MILLBROOK...
  PRATTVILLE...
  COOSADA...
  ELMORE...
  SPEIGNER...

THIS STORM MAY INTENSIFY...SO 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.

&&

LAT...LON 3264 8653 3271 8635 3248 8620 3247 8623
      3249 8624 3250 8626 3248 8627 3247 8629
      3249 8631 3244 8633 3243 8640 3241 8640
      3240 8644
TIME...MOT...LOC 1808Z 335DEG 7KT 3259 8640

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 1:33 PM CDT	Special Weather Statement	BMX	Chilton	27 min
Jul 17, 2:04 PM CDT	Special Weather Statement	BMX	Elmore	26 min
Jul 17, 2:50 PM CDT	Special Weather Statement	BMX	Clay	25 min
Jul 17, 2:52 PM CDT	Severe Thunderstorm Warning	BMX	Clay, Randolph	38 min
Jul 17, 2:59 PM CDT	Special Weather Statement	BMX	Montgomery	31 min
Jul 17, 3:03 PM CDT	Special Weather Statement	BMX	Elmore	27 min
Jul 17, 3:42 PM CDT	Special Weather Statement	BMX	Macon	33 min
Jul 17, 3:47 PM CDT	Special Weather Statement	BMX	Chilton	28 min
Jul 17, 4:00 PM CDT	Special Weather Statement	BMX	Lowndes	30 min
Jul 17, 4:09 PM CDT	Areal Flood Advisory	BMX	Randolph	3 hr
Jul 17, 4:17 PM CDT	Special Weather Statement	BMX	Bullock	43 min
Jul 17, 4:32 PM CDT	Special Weather Statement	BMX	Dallas	43 min
Jul 17, 4:56 PM CDT	Special Weather Statement	BMX	Barbour	49 min
Jul 17, 5:04 PM CDT	Areal Flood Advisory	BMX	Barbour, Bullock, Pike	3 hr
Jul 17, 5:14 PM CDT	Special Weather Statement	BMX	Lee	31 min
Jul 17, 5:44 PM CDT	Special Weather Statement	BMX	Barbour	31 min
Jul 17, 6:52 PM CDT	Special Weather Statement	BMX	Dallas	38 min

Nearby

Special Weather Statements in Alabama, 2012 Every special weather statement in 2012

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.