Alert archive / Mississippi / Tornado Watches in 2012

Tornado Watch 64

March 2, 201229 counties in Mississippi

The Storm Prediction Center issued this tornado watch at Mar 2, 2012, 4:47 PM CST for 29 counties in Mississippi. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
Mar 2, 2012, 4:47 PM CST (22:47 UTC)
Expired
Mar 2, 2012, 11:00 PM CST
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 29 counties

Attala County, MS, Choctaw County, MS, Clarke County, MS, Clay County, MS, Copiah County, MS, Covington County, MS, Forrest County, MS, Hinds County, MS, Jasper County, MS, Jefferson Davis County, MS, Jones County, MS, Kemper County, MS, Lamar County, MS, Lauderdale County, MS, Lawrence County, MS, Leake County, MS, Lincoln County, MS, Lowndes County, MS, Madison County, MS, Marion County, MS, Neshoba County, MS, Newton County, MS, Noxubee County, MS, Oktibbeha County, MS, Rankin County, MS, Scott County, MS, Simpson County, MS, Smith County, MS, Winston County, MS

The radar

The Jackson/Brandon,MS radar (KDGX), 11 km from the middle of the area, began a volume at 22:48 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
40%
One or more EF2 to EF5 tornadoes
20%
Ten or more severe wind reports
30%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
40%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Mar 2, 5:02 PM CSTSevere Thunderstorm WarningJANCovington, Jones44 min
Mar 2, 5:11 PM CSTSevere Thunderstorm WarningJANCovington, Jefferson Davis34 min
Mar 2, 5:12 PM CSTSevere Thunderstorm WarningJANClay, Webster33 min
Mar 2, 5:22 PM CSTTornado WarningJANCovington23 min
Mar 2, 5:43 PM CSTTornado WarningJANMarion27 min
Mar 2, 5:58 PM CSTSevere Thunderstorm WarningJANClay, Webster47 min
Mar 2, 6:00 PM CSTTornado WarningJANLamar45 min
Mar 2, 6:16 PM CSTSevere Thunderstorm WarningJANHinds, Issaquena, Warren, Yazoo74 min
Mar 2, 6:24 PM CSTSevere Thunderstorm WarningJANAttala, Choctaw, Montgomery, Webster66 min
Mar 2, 6:30 PM CSTTornado WarningJANForrest31 min
Mar 2, 6:36 PM CSTSevere Thunderstorm WarningJANLauderdale24 min
Mar 2, 6:50 PM CSTSevere Thunderstorm WarningJANAttala, Holmes, Humphreys, Yazoo55 min
Mar 2, 7:03 PM CSTSevere Thunderstorm WarningJANKemper11 min
Mar 2, 7:09 PM CSTSevere Thunderstorm WarningJANOktibbeha37 min
Mar 2, 7:18 PM CSTTornado WarningJANHinds, Madison, Warren, Yazoo22 min
Mar 2, 7:19 PM CSTSevere Thunderstorm WarningJANAttala, Carroll, Montgomery41 min
Mar 2, 7:21 PM CSTSevere Thunderstorm WarningJANLowndes, Noxubee24 min
Mar 2, 7:26 PM CSTSevere Thunderstorm WarningJANAttala, Holmes64 min
Mar 2, 7:38 PM CSTSevere Thunderstorm WarningJANClay, Lowndes52 min
Mar 2, 7:41 PM CSTSevere Thunderstorm WarningJANHinds, Madison49 min
Mar 2, 7:43 PM CSTSevere Thunderstorm WarningJANChoctaw, Webster35 min
Mar 2, 8:06 PM CSTSevere Thunderstorm WarningJANChoctaw, Winston39 min
Mar 2, 8:09 PM CSTSevere Thunderstorm WarningJANClay, Oktibbeha51 min
Mar 2, 8:19 PM CSTSevere Thunderstorm WarningJANHinds, Madison, Rankin56 min
Mar 2, 8:39 PM CSTSevere Thunderstorm WarningJANLowndes, Noxubee, Oktibbeha, Winston66 min
Mar 2, 9:00 PM CSTSevere Thunderstorm WarningJANLeake, Scott45 min
Mar 2, 9:06 PM CSTSevere Thunderstorm WarningJANNeshoba, Winston24 min
Mar 2, 9:17 PM CSTSevere Thunderstorm WarningJANClaiborne, Copiah, Hinds43 min
Mar 2, 9:23 PM CSTSevere Thunderstorm WarningJANNoxubee29 min
Mar 2, 10:13 PM CSTSevere Thunderstorm WarningJANKemper, Lauderdale47 min

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, 10.8 hours before the alert went out and 21 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 2012-03-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1243 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, Jackson, MS at 12:00Z on 2012-03-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 327 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
1243 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
485 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
327 m²/s²
0-3 km storm-relative helicity
382 m²/s²
Significant tornado parameter
2.5
Supercell composite
9.4

Open this sounding in Storm Lab

The text

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

142 
WWUS20 KWNS 022247
SEL4
SPC WW 022247
MSZ000-030500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 64
NWS STORM PREDICTION CENTER NORMAN OK
445 PM CST FRI MAR 2 2012

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

       SOUTHERN MISSISSIPPI

EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 445 PM UNTIL
1100 PM CST.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND
GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE
AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE
MILES EAST AND WEST OF A LINE FROM 55 MILES NORTHWEST OF MERIDIAN
MISSISSIPPI TO 45 MILES WEST SOUTHWEST OF PINE BELT 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 58...WW 59...WW 60...WW
61...WW 62...WW 63...

DISCUSSION...SCATTERED STORMS WILL CONTINUE DEVELOPING THROUGH THIS
EVENING ALONG AND AHEAD OF A COLD FRONT WITHIN A MODERATELY UNSTABLE
AND STRONGLY SHEARED ENVIRONMENT SUPPORTIVE OF SUPERCELLS. ISOLATED
TORNADOES...LARGE HAIL AND DAMAGING WIND WILL BE POSSIBLE WITH THE
STRONGER STORMS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 25035.


...DIAL

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 2, 10:28 AM CSTMesoscale DiscussionSPCDeSoto, Tate62 min
Mar 2, 12:57 PM CSTMesoscale DiscussionSPCAlcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 32 more63 min
Mar 2, 1:20 PM CSTTornado WatchSPCAlcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 24 more9 hr
Mar 2, 1:26 PM CSTMesoscale DiscussionSPCHumphreys, Issaquena, Sharkey, Warren, Washington, Yazoo64 min
Mar 2, 1:47 PM CSTSevere Thunderstorm WatchSPCAdams, Bolivar, Claiborne, Franklin, Issaquena, Jefferson and 4 more9 hr
Mar 2, 2:42 PM CSTMesoscale DiscussionSPCAmite, Clarke, Copiah, Covington, Forrest, Franklin and 26 more63 min
Mar 2, 3:25 PM CSTMesoscale DiscussionSPCAlcorn, Attala, Benton, Calhoun, Carroll, Chickasaw and 24 more65 min
Mar 2, 3:47 PM CSTMesoscale DiscussionSPCHolmes, Humphreys, Issaquena, Sharkey, Warren, Washington and 1 more58 min
Mar 2, 4:37 PM CSTTornado WatchSPCGeorge, Greene, Perry, Stone, Wayne7 hr

Nearby

Tornado Watches in Mississippi, 2012Every tornado watch 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.