Alert archive / Alabama / Wind Advisories in 2015

Wind Advisory 4, NWS Birmingham, AL

February 21, 201526 counties in Alabama

NWS Birmingham, AL issued this wind advisory at Feb 21, 2015, 12:39 PM CST for 26 counties in Alabama. It was in force for 6 hr.

The area

The counties it named.

The facts

Issued
Feb 21, 2015, 12:39 PM CST (18:39 UTC)
Expired
Feb 21, 2015, 7:00 PM CST
In force
6 hr
Issued by
NWS Birmingham, AL
All 26 counties

Autauga County, AL, Bibb County, AL, Blount County, AL, Chilton County, AL, Coosa County, AL, Dallas County, AL, Elmore County, AL, Fayette County, AL, Greene County, AL, Hale County, AL, Jefferson County, AL, Lamar County, AL, Lowndes County, AL, Marengo County, AL, Marion County, AL, Montgomery County, AL, Perry County, AL, Pickens County, AL, Pike County, AL, Shelby County, AL, St. Clair County, AL, Sumter County, AL, Talladega County, AL, Tuscaloosa County, AL, Walker County, AL, Winston County, AL

The radar

The Birmingham radar (KBMX), 32 km from the middle of the area, began a volume at 18:40 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, 6.7 hours before the alert went out and 32 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 12:00Z on 2015-02-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Birmingham, AL at 12:00Z on 2015-02-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 733 square meters per square second.1939587897117Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1008 m above ground
0-6 km bulk shear
59 kt
0-1 km storm-relative helicity
733 m²/s²
0-3 km storm-relative helicity
904 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.

484 
WWUS74 KBMX 211839
NPWBMX

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE BIRMINGHAM AL
1239 PM CST SAT FEB 21 2015

...GUSTY WINDS WILL CONTINUE ACROSS CENTRAL ALABAMA THIS AFTERNOON...

.STRONG SOUTHERLY WINDS AHEAD OF A COLD FRONT WILL CONTINUE
ACROSS MUCH OF CENTRAL ALABAMA THIS AFTERNOON INTO THE EARLY
EVENING HOURS. SUSTAINED WINDS ARE EXPECTED BETWEEN 15 AND
25 MPH...WITH GUSTS EXCEEDING 35 MPH AT TIMES.

ALZ011>015-017-022>027-030>036-039>044-049-220100-
/O.NEW.KBMX.WI.Y.0004.150221T1839Z-150222T0100Z/
MARION-LAMAR-FAYETTE-WINSTON-WALKER-BLOUNT-PICKENS-TUSCALOOSA-
JEFFERSON-SHELBY-ST. CLAIR-TALLADEGA-SUMTER-GREENE-HALE-PERRY-
BIBB-CHILTON-COOSA-MARENGO-DALLAS-AUTAUGA-LOWNDES-ELMORE-
MONTGOMERY-PIKE-
INCLUDING THE CITIES OF...HAMILTON...SULLIGENT...VERNON...
FAYETTE...DOUBLE SPRINGS...JASPER...ONEONTA...CARROLLTON...
TUSCALOOSA...BIRMINGHAM...HOOVER...COLUMBIANA...PELHAM...
ALABASTER...PELL CITY...MOODY...TALLADEGA...SYLACAUGA...
LIVINGSTON...EUTAW...GREENSBORO...MOUNDVILLE...MARION...
CENTREVILLE...CLANTON...ROCKFORD...DEMOPOLIS...LINDEN...SELMA...
PRATTVILLE...FORT DEPOSIT...HAYNEVILLE...WETUMPKA...TALLASSEE...
MONTGOMERY...TROY
1239 PM CST SAT FEB 21 2015

...WIND ADVISORY IN EFFECT UNTIL 7 PM CST THIS EVENING...

THE NATIONAL WEATHER SERVICE IN BIRMINGHAM HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL 7 PM CST THIS EVENING. 

* TIMING...OF THE STRONG WINDS WILL BE THIS AFTERNOON THROUGH 7PM
  THIS EVENING.

* WINDS...SUSTAINED BETWEEN 15 AND 25 MPH WITH A FEW GUSTS INTO
  THE 30 TO 35 MPH RANGE.

* IMPACTS...INCLUDE DIFFICULTY DRIVING IN HIGH PROFILE VEHICLES
  AND SMALL TREE LIMBS MAY BE BROKEN OR SNAPPED.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT SUSTAINED WINDS OF 24 MPH AND HIGHER...
OR WIND GUSTS OF 36 MPH AND HIGHER...ARE EXPECTED. WINDS THIS
STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH PROFILE
VEHICLES. USE EXTRA CAUTION.

&&

$$

Nearby

Wind Advisories in Alabama, 2015Every wind advisory 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.