Alert archive / Arkansas / Wind Advisories in 2011

Wind Advisory 4, NWS Memphis, TN

February 27, 20114 states

NWS Memphis, TN issued this wind advisory at Feb 27, 2011, 10:47 PM CST for 4 states. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued
Feb 27, 2011, 10:47 PM CST (04:47 UTC)
Expired
Feb 28, 2011, 6:00 AM CST
In force
7 hr
Issued by
NWS Memphis, TN
All 27 counties

Clay County, AR, Craighead County, AR, Crittenden County, AR, Cross County, AR, Greene County, AR, Lawrence County, AR, Lee County, AR, Mississippi County, AR, Phillips County, AR, Poinsett County, AR, Randolph County, AR, St. Francis County, AR, Dunklin County, MO, Pemiscot County, MO, Coahoma County, MS, DeSoto County, MS, Panola County, MS, Quitman County, MS, Tallahatchie County, MS, Tate County, MS, Tunica County, MS, Dyer County, TN, Lake County, TN, Lauderdale County, TN, Obion County, TN, Shelby County, TN, Tipton County, TN

The radar

The Memphis radar (KNQA), 34 km from the middle of the area, began a volume at 04:44 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

Little Rock, AR (KLZK), launched 00:00Z, 4.8 hours before the alert went out and 67 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, Little Rock, AR at 00:00Z on 2011-02-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 836 joules per kilogram.LCLLFCEL10008507005003002001001 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, Little Rock, AR at 00:00Z on 2011-02-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 442 square meters per square second.1939587897117136Sfc1 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
836 J/kg
Mixed-layer CIN
-37 J/kg
Mixed-layer LCL
917 m above ground
0-6 km bulk shear
70 kt
0-1 km storm-relative helicity
442 m²/s²
0-3 km storm-relative helicity
556 m²/s²
Significant tornado parameter
3.1
Supercell composite
11.5

Open this sounding in Storm Lab

The text

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

827 
WWUS74 KMEG 280447
NPWMEG

URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE MEMPHIS TN
1047 PM CST SUN FEB 27 2011

...GUSTY SOUTHWEST WINDS EXPECTED OVERNIGHT...

.STRONG SOUTHWEST LOW LEVEL WINDS AHEAD OF A POTENT AREA OF LOW
PRESSURE ARE EXPECTED TO PRODUCE GUSTY SURFACE WINDS ACROSS THE MID SOUTH
OVERNIGHT.

ARZ008-009-017-018-026>028-035-036-048-049-058-MOZ113-115-MSZ001-
007-008-010>012-020-TNZ001-002-019-048-049-088-281200-
/O.NEW.KMEG.WI.Y.0004.110228T0447Z-110228T1200Z/
RANDOLPH-CLAY-LAWRENCE-GREENE-CRAIGHEAD-POINSETT-MISSISSIPPI-
CROSS-CRITTENDEN-ST. FRANCIS-LEE AR-PHILLIPS-DUNKLIN-PEMISCOT-
DESOTO-TUNICA-TATE-COAHOMA-QUITMAN-PANOLA-TALLAHATCHIE-LAKE-OBION-
DYER-LAUDERDALE-TIPTON-SHELBY-
INCLUDING THE CITIES OF...WALNUT RIDGE...PARAGOULD...JONESBORO...
HARRISBURG...BLYTHEVILLE...WYNNE...WEST MEMPHIS...FORREST CITY...
HELENA...KENNETT...CARUTHERSVILLE...SOUTHAVEN...OLIVE BRANCH...
TUNICA...CLARKSDALE...BATESVILLE...UNION CITY...DYERSBURG...
COVINGTON...BARTLETT...GERMANTOWN...COLLIERVILLE...MEMPHIS...
MILLINGTON
1047 PM CST SUN FEB 27 2011

...WIND ADVISORY IN EFFECT UNTIL 6 AM CST MONDAY...

THE NATIONAL WEATHER SERVICE IN MEMPHIS HAS ISSUED A WIND
ADVISORY...WHICH IS IN EFFECT UNTIL 6 AM CST MONDAY. 

* WINDS:SOUTHWEST WINDS SUSTAINED BETWEEN 20 TO 30 MPH... WITH
  GUSTS UP TO 40 MPH.

* TIMING:GUSTY WINDS EXPECTED THROUGH 6 AM MONDAY MORNING.

* IMPACTS: WINDS OF THIS MAGNITUDE WILL LIKELY BLOW AROUND 
  UNSECURED OBJECTS AND MAY DOWN A FEW TREE BRANCHES.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WIND ADVISORY MEANS THAT SUSTAINED WINDS OF 25 TO 39 MPH ARE
EXPECTED...OR GUSTS WILL RANGE BETWEEN 40 AND 57 MPH. WINDS THIS
STRONG CAN MAKE DRIVING DIFFICULT...ESPECIALLY FOR HIGH PROFILE
VEHICLES. USE EXTRA CAUTION.

&&

$$

The office that day

Everything else NWS Memphis, TN issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 28, 5:29 AM CSTFlash Flood WarningMEGCarroll, Gibson3 hr
Feb 28, 6:35 AM CSTTornado WarningMEGDecatur, Henderson25 min
Feb 28, 6:53 AM CSTSpecial Weather StatementMEGShelby37 min
Feb 28, 7:08 AM CSTSpecial Weather StatementMEGShelby, Tipton22 min
Feb 28, 8:31 AM CSTFlash Flood WarningMEGCarroll, Gibson117 min
Feb 28, 12:06 PM CSTWind AdvisoryMEGCarroll, Chester, Crockett, Decatur, Dyer, Fayette and 14 more4 hr
Feb 28, 1:46 AM CSTSpecial Weather StatementMEGLawrence, Randolph29 min
Feb 28, 2:17 AM CSTSpecial Weather StatementMEGClay, Randolph43 min
Feb 28, 3:00 AM CSTSevere Thunderstorm WarningMEGClay30 min
Feb 28, 3:44 AM CSTSevere Thunderstorm WarningMEGClay46 min
Feb 28, 3:00 AM CSTSevere Thunderstorm WarningMEG30 min
Feb 28, 3:44 AM CSTSevere Thunderstorm WarningMEG46 min

Nearby

Wind Advisories in Arkansas, 2011Wind Advisories in Mississippi, 2011Wind Advisories in Tennessee, 2011Every wind advisory in 2011

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.