Alert archive / Alabama / Special Weather Statements in 2016

Special Weather Statement, NWS Birmingham, AL

July 31, 2016Chilton County, Alabama

NWS Birmingham, AL issued this special weather statement at Jul 31, 2016, 8:34 PM CDT for Chilton County, Alabama. It was in force for 41 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 31, 2016, 8:34 PM CDT (01:34 UTC)
Expired
Jul 31, 2016, 9:15 PM CDT
In force
41 min
Issued by
NWS Birmingham, AL

County Chilton County, AL

The radar

The Birmingham radar (KBMX), 41 km from the middle of the area, began a volume at 01:36 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 00:00Z, 1.6 hours before the alert went out and 42 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-pSkew-T log-p diagram, Birmingham, AL at 00:00Z on 2016-08-01Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 2092 joules per kilogram.LCLEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 00:00Z on 2016-08-01The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 12 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
2092 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
1242 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
12 m²/s²
0-3 km storm-relative helicity
45 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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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 31, 7:27 PM CDT, 1 hour 7 minutes earlier.

Area forecast discussion, Jul 31, 7:27 PM CDT, 1 hour 7 minutes before
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Hazardous weather outlook, Jul 31, 8:53 AM CDT, 11 hours 41 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
853 AM CDT SUN JUL 31 2016

ALZ011>015-017>050-011700-
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-
853 AM CDT SUN JUL 31 2016

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

.DAY ONE...OUTLOOK THROUGH TONIGHT.

TEMPERATURES IN THE MID TO UPPER 90S COMBINED WITH MOIST
CONDITIONS IN PLACE, MAY LEAD TO HIGHER HEAT INDEX VALUES THIS
AFTERNOON. A FEW LOCATIONS MAY REACH 105 AT TIMES GENERALLY ALONG
AND SOUTH OF A LINE FROM CARROLLTON TO TUSKEGEE. CONFIDENCE
REMAINS LOW AT THIS TIME, BASED ON EXPECTED SHOWER AND
THUNDERSTORM COVERAGE THIS AFTERNOON ACROSS THE SOUTH.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT IS NOT
EXPECTED.

In the hours before

Special weather statement, Jul 31, 4:57 PM CDT, 3 hours 37 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
457 PM CDT SUN JUL 31 2016

ALZ045-312245-
MACON AL-
457 PM CDT SUN JUL 31 2016

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MACON COUNTY UNTIL
545 PM CDT...

AT 457 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
LAKE TUSKEGEE...OR 8 MILES EAST OF TUSKEGEE. THIS STORM WAS NEARLY
STATIONARY.

PEA SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
TUSKEGEE...SOCIETY HILL...DAVISVILLE...LAKE TUSKEGEE...
CREEK STAND AND WARRIORSTAND.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3223 8564 3223 8567 3224 8567 3243 8568
      3251 8551 3242 8543 3231 8543
TIME...MOT...LOC 2157Z 334DEG 2KT 3239 8557

56
Special weather statement, Jul 31, 5:10 PM CDT, 3 hours 24 minutes before
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Special weather statement, Jul 31, 5:20 PM CDT, 3 hours 14 minutes before
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Special weather statement, Jul 31, 5:22 PM CDT, 3 hours 12 minutes before
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Special weather statement, Jul 31, 6:00 PM CDT, 2 hours 34 minutes before
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Special weather statement, Jul 31, 8:34 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
834 PM CDT SUN JUL 31 2016

ALZ035-010215-
CHILTON AL-
834 PM CDT SUN JUL 31 2016

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL CHILTON COUNTY UNTIL 915
PM CDT...

AT 834 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
THORSBY...OR NEAR CLANTON...MOVING SOUTHEAST AT 5 MPH.

WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM.

LOCATIONS IMPACTED INCLUDE...
CLANTON...THORSBY...GAP OF THE MOUNTAIN...POOLES CROSSROADS...
MITCHELL LAKE...I 65 REST AREA AND LOMAX.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO LOCALIZED FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 10 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3270 8672 3290 8680 3299 8661 3284 8646
      3282 8646
TIME...MOT...LOC 0134Z 330DEG 4KT 3289 8667

56

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 31, 8:08 PM CDTAreal Flood AdvisoryBMXSt. Clair112 min
Aug 1, 1:12 PM CDTSpecial Weather StatementBMXAutauga33 min
Aug 1, 2:16 PM CDTSpecial Weather StatementBMXPerry29 min
Aug 1, 2:54 PM CDTSpecial Weather StatementBMXLee51 min
Aug 1, 3:02 PM CDTSpecial Weather StatementBMXTallapoosa28 min
Aug 1, 4:07 PM CDTSpecial Weather StatementBMXBullock38 min
Aug 1, 4:30 PM CDTSpecial Weather StatementBMXRussell45 min
Aug 1, 4:46 PM CDTSpecial Weather StatementBMXRussell44 min
Aug 1, 4:52 PM CDTAreal Flood AdvisoryBMXMacon113 min
Aug 1, 5:22 PM CDTAreal Flood AdvisoryBMXBarbour, Bullock, Russell113 min
Aug 1, 6:14 PM CDTSpecial Weather StatementBMXSt. Clair, Talladega61 min

Nearby

Special Weather Statements in Alabama, 2016Every special weather statement in 2016

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.