Alert archive / Mississippi / Tornado Watches in 2014

Tornado Watch 30

March 16, 20144 states

The Storm Prediction Center issued this tornado watch at Mar 16, 2014, 4:51 AM CDT for 4 states. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued
Mar 16, 2014, 4:51 AM CDT (09:51 UTC)
Expired
Mar 16, 2014, 12:00 PM CDT
In force
7 hr
Issued by
the Storm Prediction Center
Largest hail expected
1 in
Strongest gust expected
65 kt
All 34 counties

Baldwin County, AL, Butler County, AL, Choctaw County, AL, Clarke County, AL, Conecuh County, AL, Covington County, AL, Crenshaw County, AL, Escambia County, AL, Mobile County, AL, Monroe County, AL, Washington County, AL, Wilcox County, AL, Escambia County, FL, Okaloosa County, FL, Santa Rosa County, FL, Saint Tammany Parish, LA, Tangipahoa Parish, LA, Washington Parish, LA, Clarke County, MS, Covington County, MS, Forrest County, MS, George County, MS, Greene County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Jones County, MS, Lamar County, MS, Marion County, MS, Pearl River County, MS, Perry County, MS, Stone County, MS, Walthall County, MS, Wayne County, MS

The radar

The Mobile radar (KMOB), 64 km from the middle of the area, began a volume at 09:52 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
20%
One or more gusts of 65 knots or more
30%
Ten or more severe hail reports
5%
One or more hailstones of 2 inches or more
5%
Six or more combined severe hail and wind reports
60%

Warnings issued inside it

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

IssuedProductOfficeCountiesLasted
Mar 16, 5:02 AM CDTSevere Thunderstorm WarningJANForrest, Jones, Lamar, Marion58 min
Mar 16, 5:06 AM CDTTornado WarningMOBChoctaw, Clarke24 min
Mar 16, 5:08 AM CDTSevere Thunderstorm WarningLIXWashington67 min
Mar 16, 5:25 AM CDTTornado WarningJANLamar, Marion35 min
Mar 16, 5:30 AM CDTTornado WarningMOBClarke30 min
Mar 16, 5:52 AM CDTTornado WarningJANForrest23 min
Mar 16, 5:53 AM CDTSevere Thunderstorm WarningMOBWashington52 min
Mar 16, 6:00 AM CDTTornado WarningMOBClarke, Wilcox45 min
Mar 16, 6:31 AM CDTTornado WarningMOBWashington44 min
Mar 16, 7:03 AM CDTTornado WarningLIXSaint Tammany27 min
Mar 16, 7:09 AM CDTFlash Flood WarningMOBMobile3 hr
Mar 16, 7:11 AM CDTFlash Flood WarningMOBPerry3 hr
Mar 16, 7:24 AM CDTSevere Thunderstorm WarningLIXHancock, Harrison, Jackson51 min
Mar 16, 7:41 AM CDTFlash Flood WarningMOBBaldwin, Mobile4 hr
Mar 16, 7:46 AM CDTSevere Thunderstorm WarningMOBBaldwin, Mobile44 min
Mar 16, 7:59 AM CDTTornado WarningMOBBaldwin, Mobile31 min
Mar 16, 8:18 AM CDTTornado WarningMOBEscambia27 min
Mar 16, 8:28 AM CDTSevere Thunderstorm WarningMOBMobile62 min
Mar 16, 8:37 AM CDTTornado WarningMOBConecuh, Covington38 min
Mar 16, 8:42 AM CDTSevere Thunderstorm WarningMOBEscambia, Santa Rosa33 min
Mar 16, 9:01 AM CDTFlash Flood WarningMOBBaldwin, Conecuh, Escambia29 min
Mar 16, 9:25 AM CDTTornado WarningMOBOkaloosa, Santa Rosa50 min
Mar 16, 9:49 AM CDTFlash Flood WarningMOBCovington, Escambia3 hr
Mar 16, 10:08 AM CDTSevere Thunderstorm WarningMOBBaldwin52 min
Mar 16, 10:19 AM CDTSevere Thunderstorm WarningMOBOkaloosa, Santa Rosa26 min
Mar 16, 11:02 AM CDTSevere Thunderstorm WarningMOBOkaloosa, Santa Rosa58 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

Slidell Radar S, LA (KSIL), launched 00:00Z, 9.9 hours before the alert went out and 141 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 00:00Z on 2014-03-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 72 joules per kilogram.LCLLFCEL10008507005003002001001 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, Slidell Radar S, LA at 00:00Z on 2014-03-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 233 square meters per square second.1939587897Sfc1 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
72 J/kg
Mixed-layer CIN
-7 J/kg
Mixed-layer LCL
645 m above ground
0-6 km bulk shear
61 kt
0-1 km storm-relative helicity
233 m²/s²
0-3 km storm-relative helicity
197 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.1

Open this sounding in Storm Lab

The text

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

938 
WWUS20 KWNS 160953
SEL0  
SPC WW 160953
ALZ000-FLZ000-LAZ000-MSZ000-CWZ000-161700-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 30
NWS STORM PREDICTION CENTER NORMAN OK
455 AM CDT SUN MAR 16 2014

THE NWS STORM PREDICTION CENTER HAS ISSUED A

* TORNADO WATCH FOR PORTIONS OF 
  SOUTHERN ALABAMA
  EXTREME WESTERN PANHANDLE OF FLORIDA
  SMALL PART OF SOUTHEASTERN LOUISIANA
  SOUTHEASTERN MISSISSIPPI
  COASTAL WATERS

* EFFECTIVE THIS SUNDAY MORNING FROM 455 AM UNTIL NOON CDT.

* PRIMARY THREATS INCLUDE...
  SEVERAL TORNADOES POSSIBLE
  A FEW SIGNIFICANT DAMAGING WIND GUSTS TO 75 MPH POSSIBLE

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 55 STATUTE
MILES EITHER SIDE OF A LINE FROM 35 MILES NORTH NORTHWEST OF
SLIDELL LOUISIANA TO 35 MILES EAST SOUTHEAST OF EVERGREEN
ALABAMA.  FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0).

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

&&

DISCUSSION...BAND OF TSTMS ACROSS PORTIONS SRN MS AND SERN LA IS
GRADUALLY BECOMING BETTER ORGANIZED AS IT MOVES INTO MRGLLY
FAVORABLE NEAR-SFC AIR MASS THAT IS FCST TO DESTABILIZE FURTHER
THROUGH REMAINDER MORNING.  ADDITIONAL DISCRETE/CLUSTERED
DEVELOPMENT HAS BEEN GROWING E OF THAT LINE AS WELL...WITHIN REGIME
OF MORE BACKED SFC WINDS ALONG AND S OF MARINE FRONT.  LARGE
LOW-LEVEL HODOGRAPHS AND FAVORABLE DEEP SHEAR EACH SUGGEST POTENTIAL
FOR QLCS VORTICES WITH DAMAGING GUSTS AND A TORNADO OR TWO
POSSIBLE...AND AT LEAST TRANSIENT SUPERCELLS MAY EVOLVE FROM TSTMS
AHEAD OF MAIN LINE.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450.
MEAN STORM MOTION VECTOR 24035.


...EDWARDS

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 16, 4:20 AM CDTMesoscale DiscussionSPCMobile, Washington115 min
Mar 16, 6:31 AM CDTMesoscale DiscussionSPCBaldwin, Clarke, Escambia, Mobile, Monroe, Washington and 1 more89 min
Mar 16, 7:51 AM CDTMesoscale DiscussionSPCCoffee, Geneva, Houston84 min
Mar 16, 8:59 AM CDTTornado WatchSPCBarbour, Coffee, Dale, Geneva, Henry, Houston and 1 more8 hr
Mar 16, 10:27 AM CDTMesoscale DiscussionSPCHouston93 min
Mar 16, 1:02 PM CDTMesoscale DiscussionSPCHamilton118 min
Mar 16, 2:55 PM CDTMesoscale DiscussionSPCLafayette, Taylor, Wakulla95 min
Mar 16, 1:42 AM CDTMesoscale DiscussionSPCAscension, East Baton Rouge, East Feliciana, Iberville, Lafayette, Livingston and 10 more2 hr
Mar 16, 5:46 AM CDTMesoscale DiscussionSPCBeauregard, Sabine, Vernon119 min

Nearby

Tornado Watches in Mississippi, 2014Tornado Watches in Alabama, 2014Tornado Watches in Florida, 2014Every tornado watch in 2014

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.