Alert archive / Mississippi / Wind Advisories in 2012

Wind Advisory 7, NWS Mobile, AL

March 21, 2012Choctaw County, Clarke County, Washington County, Alabama; 5 counties in Mississippi

NWS Mobile, AL issued this wind advisory at Mar 21, 2012, 11:44 AM CDT for Choctaw County, Clarke County, Washington County, Alabama; 5 counties in Mississippi. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Mar 21, 2012, 11:44 AM CDT (16:44 UTC)
Expired
Mar 21, 2012, 7:00 PM CDT
In force
7 hr
Issued by
NWS Mobile, AL

Counties Choctaw County, AL, Clarke County, AL, Washington County, AL, George County, MS, Greene County, MS, Perry County, MS, Stone County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 80 km from the middle of the area, began a volume at 16:44 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

Slidell Radar S, LA (KSIL), launched 12:00Z, 4.7 hours before the alert went out and 164 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, Slidell Radar S, LA at 12:00Z on 2012-03-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 983 joules per kilogram.LCLEL10008507005003002001001 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, Slidell Radar S, LA at 12:00Z on 2012-03-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 363 square meters per square second.193958Sfc1 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
983 J/kg
Mixed-layer CIN
0 J/kg
Mixed-layer LCL
519 m above ground
0-6 km bulk shear
46 kt
0-1 km storm-relative helicity
363 m²/s²
0-3 km storm-relative helicity
421 m²/s²
Significant tornado parameter
1.7
Supercell composite
10.7

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

833 
WWUS74 KMOB 211644
NPWMOB

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MOBILE AL
1144 AM CDT WED MAR 21 2012

...WINDY CONDITIONS AGAIN TODAY ACROSS INLAND SOUTHEAST MISSISSIPPI
AND PORTIONS OF SOUTHWEST ALABAMA...

.A VIGOROUS UPPER LEVEL LOW CONTINUES TO SLOWLY SPIN IN THE VICINITY
OF NORTHWEST TEXAS/SOUTHWEST OKLAHOMA LATE THIS MORNING...WITH A SURFACE
COLD FRONT MOVING VERY SLOWLY EAST ACROSS EASTERN LOUISIANA AND WESTERN
MISSISSIPPI. A WELL MIXED ATMOSPHERE IN ADVANCE OF THIS SYSTEM...COMBINED
WITH A STRONG LOW LEVEL JET...IS ALLOWING FOR FREQUENT STRONG WIND GUSTS
OF 30 TO 35 MPH ACROSS PARTS OF SOUTHWEST ALABAMA AND INTERIOR SOUTHEAST
MISSISSIPPI. A FEW GUSTS NEAR 40 MPH ARE POSSIBLE.

ALZ051>053-061>064-MSZ067-075-076-078-079-220000-
/O.NEW.KMOB.WI.Y.0007.120321T1644Z-120322T0000Z/
CHOCTAW-WASHINGTON-CLARKE-UPPER MOBILE-UPPER BALDWIN-LOWER MOBILE-
LOWER BALDWIN-WAYNE-PERRY-GREENE-STONE-GEORGE-
INCLUDING THE CITIES OF...BUTLER...LISMAN...SILAS...CHATOM...
MILLRY...JACKSON...THOMASVILLE...GROVE HILL...MOBILE...PRICHARD...
SARALAND...BAY MINETTE...TILLMANS CORNER...THEODORE...DAPHNE...
FAIRHOPE...FOLEY...SPANISH FORT...WAYNESBORO...RICHTON...
BEAUMONT...NEW AUGUSTA...LEAKESVILLE...MCLAIN...WIGGINS...
LUCEDALE
1144 AM CDT WED MAR 21 2012

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

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

* TIMING: BREEZY TO WINDY CONDITIONS ARE EXPECTED TO CONTINUE THROUGH
  THE AFTERNOON HOURS. 

* WINDS: SUSTAINED SOUTHEAST WINDS OF 15 TO 25 MPH WITH FREQUENT
  GUSTS OF 30 TO 35 MPH. OCCASIONAL WIND GUSTS NEAR 40 MPH ARE
  POSSIBLE.

* IMPACTS: UNSECURED OUTDOOR OBJECTS SUCH AS TRASH CAN MAY BE 
  BLOWN AROUND. DRIVING CAN BECOME DIFFICULT ESPECIALLY FOR HIGH 
  PROFILE VEHICLES. IN ADDITION...SOME SMALL TREE LIMBS MAY ALSO 
  BE BLOWN DOWN. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT WINDS OF 25 TO 39 MPH ARE EXPECTED. WINDS
THIS STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH PROFILE
VEHICLES. USE EXTRA CAUTION.

&&

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Mar 21, 3:25 PM CDTFlash Flood WatchMOBChoctaw, Clarke, Monroe, Washington, Wilcox47 hr
Mar 21, 4:11 PM CDTSevere Thunderstorm WarningMOBStone34 min

Nearby

Wind Advisories in Mississippi, 2012Wind Advisories in Alabama, 2012Every wind advisory 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; radar from the NEXRAD Level II archive.