Alert archive / Mississippi / Tornado Watches in 2013

Tornado Watch 44

February 25, 20138 counties in Alabama; 38 counties in Mississippi

The Storm Prediction Center issued this tornado watch at Feb 25, 2013, 3:54 PM CST for 8 counties in Alabama; 38 counties in Mississippi. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Feb 25, 2013, 3:54 PM CST (21:54 UTC)
Expired
Feb 25, 2013, 10:00 PM CST
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
65 kt
All 46 counties

Baldwin County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Attala County, MS, Bolivar County, MS, Carroll County, MS, Choctaw County, MS, Clarke County, MS, Clay County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Grenada County, MS, Hancock County, MS, Harrison County, MS, Holmes County, MS, Humphreys County, MS, Jackson County, MS, Jasper County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Leake County, MS, Leflore County, MS, Lowndes County, MS, Montgomery County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Pearl River County, MS, Perry County, MS, Scott County, MS, Smith County, MS, Stone County, MS, Sunflower County, MS, Wayne County, MS, Webster County, MS, Winston County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 61 km from the middle of the area, began a volume at 21:54 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.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
60%
One or more EF2 to EF5 tornadoes
40%
Ten or more severe wind reports
60%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
50%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
95%

Warnings issued inside it

7 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Feb 25, 7:14 PM CSTSevere Thunderstorm WarningJANHolmes, Humphreys, Issaquena, Sharkey, Warren, Yazoo46 min
Feb 25, 7:15 PM CSTFlash Flood WarningLIXHarrison, Jackson3 hr
Feb 25, 7:48 PM CSTFlash Flood WarningMOBMobile6 hr
Feb 25, 8:01 PM CSTTornado WarningJANHolmes, Madison, Yazoo29 min
Feb 25, 8:13 PM CSTSevere Thunderstorm WarningJANAttala, Carroll, Holmes, Montgomery47 min
Feb 25, 9:02 PM CSTSevere Thunderstorm WarningJANChoctaw, Grenada, Montgomery, Webster43 min
Feb 25, 9:48 PM CSTFlash Flood WarningMOBBaldwin, Clarke, Mobile, Washington6 hr

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Jackson, MS (KJAN), launched 12:00Z, 9.9 hours before the alert went out and 70 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, Jackson, MS at 12:00Z on 2013-02-25Temperature 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°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jackson, MS at 12:00Z on 2013-02-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 332 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
519 m above ground
0-6 km bulk shear
70 kt
0-1 km storm-relative helicity
332 m²/s²
0-3 km storm-relative helicity
286 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.

492 
WWUS20 KWNS 252202
SEL4  
SPC WW 252202
ALZ000-FLZ000-MSZ000-CWZ000-260400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 44
NWS STORM PREDICTION CENTER NORMAN OK
355 PM CST MON FEB 25 2013

THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF 

       SOUTHWEST ALABAMA
       FAR WESTERN FLORIDA PANHANDLE
       CENTRAL AND EASTERN MISSISSIPPI
       COASTAL WATERS

EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 355 PM UNTIL
1000 PM CST.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 75 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 85 STATUTE
MILES EAST AND WEST OF A LINE FROM 85 MILES NORTH NORTHWEST OF
MERIDIAN MISSISSIPPI TO 30 MILES SOUTHEAST OF GULFPORT
MISSISSIPPI.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU4).

REMEMBER...A TORNADO WATCH MEANS CONDITIONS ARE FAVORABLE FOR
TORNADOES AND SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH
AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR
THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS
AND POSSIBLE WARNINGS.

OTHER WATCH INFORMATION...CONTINUE...WW 41...WW 42...WW 43...

DISCUSSION...DIFFUSE WNW-ESE WARM FRONT OVER SRN LA AND THE N CNTRL
GULF EXPECTED TO CONTINUE REFORMING NWD AS MEAN SSWLY FLOW
STRENGTHENS ACROSS REGION DOWNSTREAM FROM PROGRESSIVE N TX UPR LOW.
ASSOCIATED INCREASE IN BOUNDARY LAYER MOISTURE/WARMING BENEATH
INCREASING UPR DIVERGENCE SUGGESTS LIKELIHOOD THAT EXISTING
SUSTAINED STORMS/SUPERCELLS NOW UPSTREAM FROM WW AREA WILL REMAIN
STRONG AS THEY MOVE/DEVELOP GENERALLY NE THROUGH LATE TNGT. THE
TORNADO THREAT MAY INCREASE LATER TNGT INVOF WARM FRONT OVER SRN
MS...SRN AL...AND THE FL PANHANDLE...DESPITE TIME OF DAY...AS MID
LVL FLOW VEERS AND STRENGTHENS IN RESPONSE TO THE CONTINUED ENE
MOTION OF UPR LOW.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
450. MEAN STORM MOTION VECTOR 22045.


...CORFIDI

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 24, 6:48 PM CSTMesoscale DiscussionSPCBaldwin, Mobile87 min
Feb 25, 2:50 AM CSTMesoscale DiscussionSPCBaldwin, Mobile115 min
Feb 25, 9:07 AM CSTMesoscale DiscussionSPCBaldwin, Escambia, Geneva, Mobile2 hr
Feb 25, 2:52 PM CSTMesoscale DiscussionSPCBaldwin, Choctaw, Clarke, Conecuh, Covington, Escambia and 3 more83 min
Feb 24, 11:57 PM CSTMesoscale DiscussionSPCAscension, Assumption, Iberia, Jefferson, Lafourche, Livingston and 9 more63 min
Feb 25, 12:04 AM CSTSevere Thunderstorm WatchSPCAscension, Assumption, East Baton Rouge, East Feliciana, Iberville, Jefferson and 14 more8 hr
Feb 25, 9:25 AM CSTMesoscale DiscussionSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 56 more65 min
Feb 25, 12:26 PM CSTTornado WatchSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 58 more10 hr
Feb 25, 2:15 PM CSTMesoscale DiscussionSPCAcadia, Allen, Ascension, Assumption, Avoyelles, Beauregard and 53 more90 min

Nearby

Tornado Watches in Mississippi, 2013Tornado Watches in Alabama, 2013Every tornado watch in 2013

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.