Alert archive / Florida / Tornado Watches in 2013
Tornado Watch 41
The Storm Prediction Center issued this tornado watch at Feb 25, 2013, 12:26 PM EST for 23 counties in Florida. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Feb 25, 2013, 12:26 PM EST (17:26 UTC)
- Expired
- Feb 25, 2013, 7:05 PM EST
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
All 23 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, Franklin County, FL, Gilchrist County, FL, Hamilton County, FL, Jefferson County, FL, Lafayette County, FL, Levy 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, Wakulla County, FL
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 30%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 30%
- One or more hailstones of 2 inches or more
- 20%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
3 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 25, 12:47 PM EST | Tornado Warning | TAE | Franklin | 43 min |
| Feb 25, 1:30 PM EST | Tornado Warning | TAE | Franklin, Wakulla | 45 min |
| Feb 25, 5:25 PM EST | Severe Thunderstorm Warning | JAX | Baker, Bradford, Clay, Duval, Saint Johns | 50 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, 5.4 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.
- Mixed-layer CAPE
- 43 J/kg
- Mixed-layer CIN
- -55 J/kg
- Mixed-layer LCL
- 435 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- -39 m²/s²
- 0-3 km storm-relative helicity
- 220 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.0
The text
As transmitted, in the capitals the NWS used until 2016.
567
WWUS20 KWNS 251729
SEL1
SPC WW 251729
FLZ000-CWZ000-260100-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 41
NWS STORM PREDICTION CENTER NORMAN OK
1225 PM EST MON FEB 25 2013
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
NORTH FLORIDA AND THE EASTERN FLORIDA PANHANDLE
COASTAL WATERS
EFFECTIVE THIS MONDAY AFTERNOON AND EVENING FROM 1225 PM UNTIL
800 PM 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 120 STATUTE
MILES EAST AND WEST OF A LINE FROM 5 MILES NORTH NORTHEAST OF
JACKSONVILLE FLORIDA TO 35 MILES SOUTHWEST OF CROSS CITY FLORIDA.
FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU1).
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...SQLN NOW W OF TALLAHASSEE AND APALACHICOLA MAY INCREASE
AS THE FEATURE...POSSIBLY TIED TO A WEAK IMPULSE IN WSW FLOW
ALOFT...INTERACTS WITH SLOWLY-ADVANCING W-E WARM FRONT DOWNSTREAM
ACROSS N FL. POTENTIAL WILL EXIST FOR BOWING SEGMENTS AND/OR A
TORNADO OR TWO WHERE STRONGER ASSOCIATED UPDRAFTS INTERACT WITH WARM
FRONT. ELEVATED STORMS WITH SVR HAIL MAY OCCUR IN NRN PART OF
LINE...AND AN ADDITIONAL STORM OR TWO MAY FORM AHEAD OF IT AS
MODERATE SFC HEATING BOOSTS SBCAPE TO AROUND 1000 J/KG.
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
450. MEAN STORM MOTION VECTOR 27030.
...CORFIDISPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 25, 3:50 AM EST | Mesoscale Discussion | SPC | Escambia, Santa Rosa | 115 min |
| Feb 25, 10:07 AM EST | Mesoscale Discussion | SPC | Alachua, Baker, Bay, Bradford, Calhoun, Clay and 27 more | 2 hr |
| Feb 25, 2:43 PM EST | Mesoscale Discussion | SPC | Alachua, Baker, Bradford, Clay, Columbia, Dixie and 11 more | 62 min |
| Feb 25, 3:52 PM EST | Mesoscale Discussion | SPC | Escambia, Holmes, Okaloosa, Santa Rosa, Walton | 83 min |
| Feb 25, 4:54 PM EST | Tornado Watch | SPC | Escambia, Santa Rosa | 6 hr |
| Feb 25, 6:43 PM EST | Mesoscale Discussion | SPC | Alachua, Bradford, Clay, Duval, Flagler, Gilchrist and 5 more | 62 min |
Nearby
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.