Alert archive / Florida / Tornado Watches in 2006
Tornado Watch 474
The Storm Prediction Center issued this tornado watch at Jun 13, 2006, 3:42 AM EDT for 19 counties in Florida; 10 counties in Georgia. It was in force for 10 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 13, 2006, 3:42 AM EDT (07:42 UTC)
- Expired
- Jun 13, 2006, 2:00 PM EDT
- In force
- 10 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 60 kt
All 29 counties
Alachua County, FL, Baker County, FL, Bradford County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Duval County, FL, Flagler County, FL, Gilchrist County, FL, Hamilton County, FL, Lafayette County, FL, Madison County, FL, Marion County, FL, Nassau County, FL, Putnam County, FL, Saint Johns County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Brantley County, GA, Camden County, GA, Charlton County, GA, Clinch County, GA, Echols County, GA, Glynn County, GA, Lanier County, GA, Lowndes County, GA, Pierce County, GA, Ware County, GA
The radar
The Jacksonville radar (KJAX), 93 km from the middle of the area, began a volume at 07:42 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
- 50%
- One or more EF2 to EF5 tornadoes
- 10%
- Ten or more severe wind reports
- 20%
- One or more gusts of 65 knots or more
- 5%
- 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
- 30%
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 |
|---|---|---|---|---|
| Jun 13, 3:44 AM EDT | Tornado Warning | JAX | Duval, Saint Johns | 31 min |
| Jun 13, 4:15 AM EDT | Tornado Warning | JAX | Duval | 30 min |
| Jun 13, 5:48 AM EDT | Tornado Warning | JAX | Camden | 42 min |
| Jun 13, 12:15 PM EDT | Flash Flood Warning | TAE | Jefferson, Madison, Taylor | 2 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
Jacksonville, FL (KJAX), launched 00:00Z, 7.7 hours before the alert went out and 94 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.
- Mixed-layer CAPE
- 14 J/kg
- Mixed-layer CIN
- -50 J/kg
- Mixed-layer LCL
- 804 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -79 m²/s²
- 0-3 km storm-relative helicity
- -47 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 130739
SEL4
SPC WW 130739
FLZ000-GAZ000-CWZ000-131800-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 474
NWS STORM PREDICTION CENTER NORMAN OK
340 AM EDT TUE JUN 13 2006
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
NORTHERN FLORIDA
SOUTHEASTERN GEORGIA
COASTAL WATERS
EFFECTIVE THIS TUESDAY MORNING AND AFTERNOON FROM 340 AM UNTIL
200 PM EDT.
TORNADOES...HAIL TO 0.5 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 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 30 MILES SOUTHEAST OF CROSS
CITY FLORIDA TO 15 MILES NORTHWEST OF BRUNSWICK GEORGIA. 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 473...
DISCUSSION...TORNADO THREAT EXPECTED TO SLOWLY EXPAND NWD THROUGH
THE MORNING AHEAD OF ALBERTO NOW APPROACHING THE BIG BEND REGION OF
FL. VERY STRONG LOW LEVEL SHEAR AND INCREASED HELICITY NEAR SURFACE
WARM FRONT MAY ENHANCE THE POTENTIAL FOR LOW LEVEL ROTATION AND A
FEW TORNADOES.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 0.5 INCH. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 19030.
...EVANSSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 12, 9:41 PM EDT | Tornado Watch | SPC | Alachua, Charlotte, Citrus, DeSoto, Dixie, Flagler and 17 more | 10 hr |
| Jun 13, 12:53 AM EDT | Mesoscale Discussion | SPC | Lake, Sumter | 97 min |
| Jun 13, 3:19 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Charlotte, Citrus and 42 more | 86 min |
| Jun 13, 7:21 AM EDT | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Brevard, Charlotte, Citrus and 33 more | 24 min |
| Jun 13, 2:01 PM EDT | Mesoscale Discussion | SPC | Bryan, Chatham, Effingham, Liberty, Long, McIntosh | 89 min |
| Jun 13, 2:25 PM EDT | Tornado Watch | SPC | Bryan, Bulloch, Candler, Chatham, Effingham, Evans and 6 more | 7 hr |
| Jun 13, 7:44 PM EDT | Mesoscale Discussion | SPC | Effingham, Screven | 2 hr |
Nearby
Tornado Watches in Florida, 2006Tornado Watches in Georgia, 2006Every 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.