Alert archive / Alabama / Special Weather Statements in 2015

Special Weather Statement, NWS Birmingham, AL

August 7, 2015Sumter County, Alabama

NWS Birmingham, AL issued this special weather statement at Aug 7, 2015, 12:32 PM CDT for Sumter County, Alabama. It was in force for 43 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: Aug 7, 2015, 12:32 PM CDT (17:32 UTC)
Expired: Aug 7, 2015, 1:15 PM CDT
In force: 43 min
Issued by: NWS Birmingham, AL

County Sumter County, AL

The radar

The Columbus AFB radar (KGWX), 128 km from the middle of the area, began a volume at 17:35 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, 5.5 hours before the alert went out and 135 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: 1186 J/kg
Mixed-layer CIN: -57 J/kg
Mixed-layer LCL: 789 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 203 m²/s²
0-3 km storm-relative helicity: 255 m²/s²
Significant tornado parameter: 0.8
Supercell composite: 6.3

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 Aug 7, 9:15 AM CDT, 3 hours 17 minutes earlier.

Area forecast discussion, Aug 7, 9:15 AM CDT, 3 hours 17 minutes before

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Hazardous weather outlook, Aug 7, 8:53 AM CDT, 3 hours 39 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
853 AM CDT FRI AUG 7 2015

ALZ011>015-017>050-081700-
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 FRI AUG 7 2015

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

.DAY ONE...THROUGH TONIGHT.

SEVERE THUNDERSTORMS WILL BE POSSIBLE ACROSS THE SOUTHWESTERN HALF
OF CENTRAL ALABAMA. THIS AREA WILL GENERALLY BE ALONG AND SOUTH OF
A LINE FROM VERNON TO HOOVER TO AUBURN...FROM 11 AM THROUGH 7 PM.
THESE STORMS WILL BE CAPABLE OF PRODUCING DAMAGING WINDS AROUND 60
MPH.

THE HEAT AND HUMIDITY WILL LEAD TO MAXIMUM HEAT INDICES OF 105 TO
109 DEGREES THIS AFTERNOON ACROSS SOUTHWEST CENTRAL ALABAMA.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY.

THE HEAT AND HUMIDITY COULD LEAD TO HEAT INDICES NEAR OR ABOVE
105 DEGREES SATURDAY THROUGH TUESDAY ACROSS PORTIONS OF CENTRAL
ALABAMA...ESPECIALLY THE SOUTH AND WEST.

.SPOTTER INFORMATION STATEMENT...

ACTIVATION OF STORM SPOTTERS AND EMERGENCY MANAGEMENT MAY BECOME
NECESSARY TODAY.

In the hours before

Special weather statement, Aug 7, 12:32 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1232 PM CDT FRI AUG 7 2015

ALZ030-071815-
SUMTER AL-
1232 PM CDT FRI AUG 7 2015

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN SUMTER COUNTY UNTIL
115 PM CDT...

AT 1232 PM CDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM
OVER EMELLE...OR 11 MILES NORTHWEST OF LIVINGSTON...MOVING EAST AT 30
MPH.

HALF INCH HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.

LOCATIONS IMPACTED INCLUDE...
LIVINGSTON...GAINESVILLE...EPES...EMELLE...BLUFFPORT...THE UNIVERSITY
OF WEST ALABAMA...BOYD...GEIGER AND SUMTERVILLE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

FREQUENT CLOUD TO GROUND LIGHTNING IS OCCURRING WITH THIS STORM.
LIGHTNING CAN STRIKE 15 MILES AWAY FROM A THUNDERSTORM. SEEK A SAFE
SHELTER INSIDE A BUILDING OR VEHICLE.

&&

LAT...LON 3298 8834 3290 8819 3286 8816 3284 8818
      3283 8818 3283 8814 3280 8810 3280 8807
      3277 8808 3278 8810 3277 8811 3272 8808
      3269 8812 3269 8804 3267 8806 3264 8806
      3263 8808 3260 8806 3254 8807 3264 8838
TIME...MOT...LOC 1732Z 291DEG 27KT 3274 8829

05/MA

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 6, 7:04 PM CDT	Severe Thunderstorm Warning	BMX	Lee, Russell	41 min
Aug 6, 7:22 PM CDT	Special Weather Statement	BMX	Autauga, Elmore	38 min
Aug 6, 7:41 PM CDT	Severe Thunderstorm Warning	BMX	Elmore, Macon, Montgomery, Tallapoosa	64 min
Aug 6, 7:49 PM CDT	Special Weather Statement	BMX	Russell	26 min
Aug 6, 8:21 PM CDT	Severe Thunderstorm Warning	BMX	Bullock, Macon, Montgomery	54 min
Aug 6, 8:23 PM CDT	Areal Flood Advisory	BMX	Elmore, Macon, Montgomery	2 hr
Aug 6, 8:53 PM CDT	Severe Thunderstorm Warning	BMX	Russell	33 min
Aug 6, 9:04 PM CDT	Special Weather Statement	BMX	Barbour	56 min
Aug 6, 9:28 PM CDT	Special Weather Statement	BMX	Pike	62 min
Aug 6, 10:32 PM CDT	Special Weather Statement	BMX	Pike	28 min
Aug 6, 10:39 PM CDT	Tornado Warning	BMX	Pike	36 min
Aug 7, 1:08 AM CDT	Special Weather Statement	BMX	Chambers, Lee	52 min
Aug 7, 5:52 AM CDT	Heat Advisory	BMX	Autauga, Dallas, Greene, Hale, Lowndes, Marengo and 5 more	12 hr
Aug 7, 12:49 PM CDT	Severe Thunderstorm Warning	BMX	Sumter	37 min
Aug 7, 1:11 PM CDT	Severe Thunderstorm Warning	BMX	Marengo	28 min
Aug 7, 1:42 PM CDT	Special Weather Statement	BMX	Marengo	48 min
Aug 7, 2:24 PM CDT	Special Weather Statement	BMX	Pike	36 min
Aug 7, 2:38 PM CDT	Special Weather Statement	BMX	Russell	37 min
Aug 7, 2:52 PM CDT	Special Weather Statement	BMX	Bullock	38 min
Aug 7, 3:27 PM CDT	Heat Advisory	BMX	Autauga, Barbour, Bibb, Blount, Bullock, Chambers and 28 more	3 days
Aug 7, 3:29 PM CDT	Special Weather Statement	BMX	Barbour	61 min
Aug 7, 3:37 PM CDT	Special Weather Statement	BMX	Autauga	38 min
Aug 7, 3:58 PM CDT	Special Weather Statement	BMX	Autauga	32 min

Nearby

Special Weather Statements in Alabama, 2015 Every special weather statement in 2015

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.