Alert archive / Georgia / Tornado Watches in 2006

Tornado Watch 19

January 13, 200612 counties in Florida; 18 counties in Georgia; 8 counties in South Carolina

The Storm Prediction Center issued this tornado watch at Jan 13, 2006, 4:45 PM EST for 12 counties in Florida; 18 counties in Georgia; 8 counties in South Carolina. It was in force for 7 hr.

The area

The outline as issued.

The facts

Issued: Jan 13, 2006, 4:45 PM EST (21:45 UTC)
Expired: Jan 14, 2006, 12:00 AM EST
In force: 7 hr
Issued by: the Storm Prediction Center

All 38 counties

Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Marion County, FL, Nassau County, FL, Putnam County, FL, Saint Johns County, FL, Union County, FL, Brantley County, GA, Bryan County, GA, Bulloch County, GA, Camden County, GA, Candler County, GA, Charlton County, GA, Chatham County, GA, Effingham County, GA, Evans County, GA, Glynn County, GA, Jenkins County, GA, Liberty County, GA, Long County, GA, McIntosh County, GA, Pierce County, GA, Screven County, GA, Tattnall County, GA, Wayne County, GA, Allendale County, SC, Beaufort County, SC, Berkeley County, SC, Charleston County, SC, Colleton County, SC, Dorchester County, SC, Hampton County, SC, Jasper County, SC

The radar

The Jacksonville radar (KJAX), 118 km from the middle of the area, began a volume at 21:46 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

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

Issued	Product	Office	Counties	Lasted
Jan 13, 4:53 PM EST	Severe Thunderstorm Warning	JAX	Saint Johns	52 min
Jan 13, 5:18 PM EST	Severe Thunderstorm Warning	JAX	Flagler	34 min
Jan 13, 6:53 PM EST	Severe Thunderstorm Warning	CHS	Bulloch, Candler	52 min
Jan 13, 8:05 PM EST	Severe Thunderstorm Warning	JAX	Charlton	25 min
Jan 13, 8:16 PM EST	Severe Thunderstorm Warning	JAX	Camden	44 min
Jan 13, 8:23 PM EST	Tornado Warning	JAX	Camden	37 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

Jacksonville, FL (KJAX), launched 12:00Z, 9.8 hours before the alert went out and 117 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: 1 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 925 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 41 m²/s²
0-3 km storm-relative helicity: 64 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 132145
SEL9  
SPC WW 132145
FLZ000-GAZ000-SCZ000-CWZ000-140500-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 19
NWS STORM PREDICTION CENTER NORMAN OK
445 PM EST FRI JAN 13 2006

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

       NORTHEASTERN FLORIDA
       SOUTHEASTERN GEORGIA
       SOUTHERN SOUTH CAROLINA
       COASTAL WATERS

EFFECTIVE THIS FRIDAY AFTERNOON FROM 445 PM UNTIL MIDNIGHT EST.

TORNADOES...HAIL TO 1.5 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 55 STATUTE MILES
EAST AND WEST OF A LINE FROM 60 MILES NORTH OF SAVANNAH GEORGIA TO
30 MILES SOUTHEAST OF GAINESVILLE FLORIDA.  FOR A COMPLETE
DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE
(WOUS64 KWNS WOU9).

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 18...

DISCUSSION...VERY STRONG LOW AND DEEP LAYER SHEAR HAS DEVELOPED
ACROSS THE REGION AHEAD OF POTENT MID/UPPER LEVEL TROUGH AND
ASSOCIATED 90+ KT MID LEVEL JET STREAK.  AREA VWP/S INDICATE 0-1 KM
SRH IN EXCESS OF 200 M2/S2.  THOUGH INSTABILITY REMAINS MODEST WITH
SBCAPES GENERALLY AROUND 1000 J/KG...RATHER MOIST BOUNDARY LAYER AND
STRONG ASCENT SHOULD SUPPORT WIDESPREAD THUNDERSTORMS THIS EVENING. 
GIVEN DEGREE OF SHEAR...STRONGER CELLS WILL BE CAPABLE OF TORNADOES
AND DAMAGING WINDS.  MARGINALLY SEVERE HAIL MAY ALSO OCCUR.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 24035.


...EVANS

325,0801 292,0810 292,0825 325,0820

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jan 13, 6:20 AM EST	Mesoscale Discussion	SPC	Escambia, Okaloosa, Santa Rosa	85 min
Jan 13, 8:11 AM EST	Tornado Watch	SPC	Bay, Calhoun, Escambia, Gulf, Holmes, Jackson and 4 more	7 hr
Jan 13, 11:15 AM EST	Mesoscale Discussion	SPC	Baker, Bay, Calhoun, Columbia, Gadsden, Hamilton and 10 more	90 min
Jan 13, 1:03 PM EST	Tornado Watch	SPC	Columbia, Dixie, Franklin, Gadsden, Hamilton, Jefferson and 7 more	8 hr
Jan 13, 1:55 PM EST	Mesoscale Discussion	SPC	Bay, Calhoun, Gadsden, Gulf, Hamilton, Holmes and 12 more	95 min
Jan 13, 4:36 PM EST	Mesoscale Discussion	SPC	Alachua, Baker, Bradford, Clay, Duval, Nassau and 3 more	84 min
Jan 13, 5:48 PM EST	Mesoscale Discussion	SPC	Brevard, Broward, Highlands, Indian River, Martin, Okeechobee and 7 more	117 min
Jan 13, 4:08 PM EST	Mesoscale Discussion	SPC	Bryan, Bulloch, Chatham, Effingham, Evans, Jenkins and 5 more	97 min
Jan 13, 6:17 PM EST	Tornado Watch	SPC	Burke, Columbia, Lincoln, McDuffie, Richmond	7 hr

Nearby

Tornado Watches in Georgia, 2006 Tornado Watches in Florida, 2006 Tornado Watches in South Carolina, 2006 Every tornado watch in 2006

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.