Alert archive / Alabama / Special Weather Statements in 2015

Special Weather Statement, NWS Birmingham, AL

July 28, 2015Autauga County, Alabama

NWS Birmingham, AL issued this special weather statement at Jul 28, 2015, 3:16 PM CDT for Autauga County, Alabama. It was in force for 44 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 28, 2015, 3:16 PM CDT (20:16 UTC)
Expired
Jul 28, 2015, 4:00 PM CDT
In force
44 min
Issued by
NWS Birmingham, AL

County Autauga County, AL

The radar

The Maxwell AFB radar (KMXX), 64 km from the middle of the area, began a volume at 20:35 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

Peachtre/Fal Fld, GA (KFFC), launched 12:00Z, 8.3 hours before the alert went out and 210 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, Peachtre/Fal Fld, GA at 12:00Z on 2015-07-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 661 joules per kilogram.LCLLFCEL10008507005003002001001 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, Peachtre/Fal Fld, GA at 12:00Z on 2015-07-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 10 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
661 J/kg
Mixed-layer CIN
-50 J/kg
Mixed-layer LCL
1114 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
10 m²/s²
0-3 km storm-relative helicity
25 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 28, 3:15 PM CDT, 1 minute earlier.

Area forecast discussion, Jul 28, 3:15 PM CDT, 1 minute before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BIRMINGHAM AL
315 PM CDT TUE JUL 28 2015

.DISCUSSION...

UPPER LEVEL RIDGING IS ONE AGAIN EXERTING ITS INFLUENCE ON CENTRAL
ALABAMA AND SURROUNDING AREAS. TEMPERATURES IN MANY AREAS CLIMBED
INTO THE MID/UPPER 90S...WITH BORDERLINE HEAT ADVISORY CONDITIONS.
TEMPS AND HUMIDITY SHOULD BE AT LEAST AS HIGH TOMORROW...AND WILL
GO AHEAD AND PULL THE TRIGGER ON ANOTHER HEAT ADVISORY FOR A
LARGE PORTION OF OUR AREA...INCLUDING BIRMINGHAM AND MONTGOMERY
METRO AREAS. AS WITH TODAY...NO OBVIOUS LARGE SCALE THUNDERSTORM
TRIGGERS AS MESOSCALE PROCESSES RULE THE DAY. WILL THEREFORE
BROADBRUSH POPS FOR TOMORROW...AND LET THE MORNING SHIFT TOMORROW
TRY TO IDENTIFY THE MESOSCALE BOUNDARIES THAT MIGHT LEAD TO
SLIGHTLY BETTER RAIN CHANCES.

AS WE DID EARLIER THIS SUMMER...I THINK WE'LL TAKE THE HEAT
ADVISORY ONE DAY AT A TIME WITH THIS GO 'ROUND AS WELL. BY THE
TIME WE GET TO THE MIDDLE AND END OF THE WEEK...IT APPEARS THE
UPPER RIDGE RETROGRADES PLACING THE SOUTHEAST STATES IN A WEAKNESS
IN BETWEEN TWO RIDGES. THIS SHOULD (SHOULD) KEEP CONDITIONS CLOSER
TO SEASONAL NORMALS. IF ANYTHING...IT LOOKS LIKE SOME DRIER AIR
DOES WORK IN FROM THE NORTH. SO EVEN IF AFTERNOON AIR TEMPS ARE
NOT ALL THAT LOWER...THE LOWER HUMIDITY SHOULD KEEP US BELOW HEAT
ADVISORY CRITERIA. IT WOULD ALSO LIMIT THE CHANCE OF RAIN TO THE
SOUTHERN THIRD TO QUARTER OF THE CWA AS WELL.

/61/

&&

.AVIATION...
18Z TAF DISCUSSION.

ISOLATED TO SCATTERED CONVECTION HAS ALREADY DEVELOPED WITH THE
BEST CHANCES ACROSS THE NORTH AND EAST THRU THE REMAINDER OF THE
DAY. DUE TO SCATTERED NATURE OF THE ACTIVITY WILL HAVE TO AMEND
THRU THE DAY FOR ANY TS IMPACTS. CONVECTION SHOULD DIMINISH WITH
SUNSET. SOME PATCHY LIGHT FOG IS POSSIBLE ONCE AGAIN LATE TONIGHT.

19

&&

.PRELIMINARY POINT TEMPS/POPS...
GADSDEN     74  94  75  92  71 /  30  40  30  30  20
ANNISTON    74  93  75  93  73 /  30  40  30  40  30
BIRMINGHAM  75  95  76  93  73 /  20  40  30  30  20
TUSCALOOSA  75  97  76  95  74 /  20  40  30  30  20
CALERA      75  94  75  93  73 /  20  40  30  40  30
AUBURN      74  94  74  92  74 /  30  40  30  50  40
MONTGOMERY  76  96  76  96  76 /  30  40  30  40  40
TROY        75  97  75  94  75 /  30  40  30  50  40

&&

.BMX WATCHES/WARNINGS/ADVISORIES...
HEAT ADVISORY FROM 12 NOON TO 9 PM CDT WEDNESDAY FOR AUTAUGA-
BARBOUR-BIBB-BULLOCK-CHILTON-DALLAS-ELMORE-FAYETTE-GREENE-HALE-
JEFFERSON-LAMAR-LEE-LOWNDES-MACON-MARENGO-MARION-MONTGOMERY-
PERRY-PICKENS-PIKE-RUSSELL-SHELBY-SUMTER-TUSCALOOSA-WALKER-
WINSTON.

&&
Hazardous weather outlook, Jul 28, 3:50 AM CDT, 11 hours 26 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BIRMINGHAM AL
350 AM CDT TUE JUL 28 2015

ALZ011>015-017>050-291200-
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-
350 AM CDT TUE JUL 28 2015

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...WEDNESDAY THROUGH MONDAY.

TEMPERATURES IN THE 90S AND HIGH HUMIDITY VALUES WILL COMBINE TO
PRODUCE MAXIMUM HEAT INDICES AROUND 105 DEGREES ON WEDNESDAY AND
THURSDAY AFTERNOONS MAINLY ACROSS THE SOUTH AND WEST.

.SPOTTER INFORMATION STATEMENT...

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

In the hours before

Special weather statement, Jul 28, 3:16 PM CDT, 0 minutes before
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      <h1 id="headline">This service is currently unavailable.</h1>
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The office that day

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

IssuedProductOfficeCountiesLasted
Jul 28, 3:20 PM CDTHeat AdvisoryBMXAutauga, Barbour, Bibb, Bullock, Chilton, Dallas and 21 more23 hr
Jul 28, 4:27 PM CDTSpecial Weather StatementBMXShelby48 min
Jul 28, 4:32 PM CDTSpecial Weather StatementBMXLee43 min
Jul 28, 4:36 PM CDTSpecial Weather StatementBMXLowndes24 min
Jul 28, 5:02 PM CDTSpecial Weather StatementBMXCalhoun43 min
Jul 28, 5:13 PM CDTSpecial Weather StatementBMXRandolph32 min
Jul 28, 5:15 PM CDTSevere Thunderstorm WarningBMXCalhoun, Cleburne, Talladega33 min
Jul 28, 5:45 PM CDTSevere Thunderstorm WarningBMXRandolph45 min
Jul 28, 6:29 PM CDTSpecial Weather StatementBMXEtowah46 min

Nearby

Special Weather Statements in Alabama, 2015Every 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.