Alert archive / Florida / Tornado Watches in 2005

Tornado Watch 896

December 14, 20054 states

The Storm Prediction Center issued this tornado watch at Dec 14, 2005, 9:29 PM CST for 4 states. It was in force for 8 hr.

The area

The outline as issued.

The facts

Issued: Dec 14, 2005, 9:29 PM CST (03:29 UTC)
Expired: Dec 15, 2005, 5:00 AM CST
In force: 8 hr
Issued by: the Storm Prediction Center

All 29 counties

Baldwin County, AL, Coffee County, AL, Covington County, AL, Dale County, AL, Escambia County, AL, Geneva County, AL, Henry County, AL, Houston County, AL, Mobile County, AL, Bay County, FL, Calhoun County, FL, Escambia County, FL, Gulf County, FL, Holmes County, FL, Jackson County, FL, Okaloosa County, FL, Santa Rosa County, FL, Walton County, FL, Washington County, FL, Jefferson Parish, LA, Orleans Parish, LA, Plaquemines Parish, LA, Saint Bernard Parish, LA, George County, MS, Hancock County, MS, Harrison County, MS, Jackson County, MS, Pearl River County, MS, Stone County, MS

The radar

The Mobile radar (KMOB), 24 km from the middle of the area, began a volume at 03:29 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.

Warnings issued inside it

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

Issued	Product	Office	Counties	Lasted
Dec 14, 9:57 PM CST	Severe Thunderstorm Warning	MOB	Perry, Stone	33 min
Dec 14, 10:05 PM CST	Severe Thunderstorm Warning	LIX	Jefferson, Lafourche, Orleans, Plaquemines, Saint Bernard	55 min
Dec 14, 10:29 PM CST	Severe Thunderstorm Warning	MOB	George, Stone	46 min
Dec 14, 10:36 PM CST	Severe Thunderstorm Warning	LIX	Hancock, Harrison, Jackson	54 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, 3.5 hours before the alert went out and 157 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 69 J/kg
Mixed-layer CIN: -12 J/kg
Mixed-layer LCL: 623 m above ground
0-6 km bulk shear: 65 kt
0-1 km storm-relative helicity: 224 m²/s²
0-3 km storm-relative helicity: 260 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.

000 
WWUS20 KWNS 150330
SEL6  
SPC WW 150330
ALZ000-FLZ000-LAZ000-MSZ000-CWZ000-151100-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 896
NWS STORM PREDICTION CENTER NORMAN OK
930 PM CST WED DEC 14 2005

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

       SOUTHERN ALABAMA
       WESTERN FLORIDA PANHANDLE
       EXTREME SOUTHEAST LOUISIANA
       SOUTHEAST MISSISSIPPI
       COASTAL WATERS

EFFECTIVE THIS WEDNESDAY NIGHT AND THURSDAY MORNING FROM 930 PM
UNTIL 500 AM CST.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 50 STATUTE MILES
NORTH AND SOUTH OF A LINE FROM 25 MILES SOUTHWEST OF SLIDELL
LOUISIANA TO 10 MILES EAST SOUTHEAST OF MARIANNA FLORIDA.  FOR A
COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE
UPDATE (WOUS64 KWNS WOU6).

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...POTENT TROUGH MOVING RAPIDLY EWD ACROSS TX WITH
DEVELOPING SURFACE LOW SERN LA.  STRONG/VERY FAVORABLE SHEAR
PROFILES IN PLACE AHEAD OF SURFACE LOW VICINITY GULF COAST.  WHILE
AIRMASS ONLY MARGINALLY UNSTABLE...GIVEN THE OTHERWISE POTENT
KINEMATIC ENVIRONMENT...THERE WILL BE POTENTIAL FOR DAMAGING
WINDS/TORNADOES ASSOCIATED WITH SQUALL LINE CURRENTLY MOVING EWD
ACROSS SERN LA/SRN MS.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH. EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500.
MEAN STORM MOTION VECTOR 24040.


...HALES

304,0900 313,0850 300,0850 292,0900

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 14, 9:04 PM CST	Mesoscale Discussion	SPC	Washington	86 min
Dec 15, 2:31 AM CST	Mesoscale Discussion	SPC	Coffee, Covington, Dale, Geneva, Henry, Houston	119 min
Dec 15, 5:22 AM CST	Mesoscale Discussion	SPC	Bay, Franklin, Gulf	113 min
Dec 15, 5:56 AM CST	Tornado Watch	SPC	Bay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 13 more	7 hr
Dec 15, 7:37 AM CST	Mesoscale Discussion	SPC	Bay, Calhoun, Dixie, Franklin, Gadsden, Gulf and 10 more	53 min
Dec 15, 11:05 AM CST	Mesoscale Discussion	SPC	Franklin, Gadsden, Jefferson, Leon, Liberty, Madison and 2 more	55 min
Dec 15, 12:19 PM CST	Mesoscale Discussion	SPC	Dixie, Hamilton, Jefferson, Lafayette, Leon, Madison and 3 more	56 min
Dec 15, 4:46 PM CST	Mesoscale Discussion	SPC	Citrus, Hernando, Pasco	89 min
Dec 14, 7:05 PM CST	Mesoscale Discussion	SPC	Assumption, Jefferson, Lafourche, Plaquemines, Saint Charles, Saint James and 1 more	85 min

Nearby

Tornado Watches in Florida, 2005 Tornado Watches in Alabama, 2005 Tornado Watches in Mississippi, 2005 Every tornado watch in 2005

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.