Alert archive / Florida / Tornado Watches in 2008
Tornado Watch 22
The Storm Prediction Center issued this tornado watch at Jan 19, 2008, 3:29 PM EST for 16 counties in Florida. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 19, 2008, 3:29 PM EST (20:29 UTC)
- Expired
- Jan 19, 2008, 8:29 PM EST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 1.5 in
- Strongest gust expected
- 60 kt
Counties Alachua County, FL, Citrus County, FL, Flagler County, FL, Hernando County, FL, Hillsborough County, FL, Lake County, FL, Levy County, FL, Marion County, FL, Orange County, FL, Pasco County, FL, Pinellas County, FL, Putnam County, FL, Saint Johns County, FL, Seminole County, FL, Sumter County, FL, Volusia County, FL
The radar
The Tampa radar (KTBW), 137 km from the middle of the area, began a volume at 20:29 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.
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
- 30%
- One or more gusts of 65 knots or more
- 30%
- Ten or more severe hail reports
- 20%
- One or more hailstones of 2 inches or more
- 10%
- Six or more combined severe hail and wind reports
- 60%
Warnings issued inside it
17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 19, 3:50 PM EST | Severe Thunderstorm Warning | TBW | Levy | 55 min |
| Jan 19, 4:35 PM EST | Severe Thunderstorm Warning | JAX | Alachua, Marion, Putnam | 25 min |
| Jan 19, 4:59 PM EST | Severe Thunderstorm Warning | JAX | Clay, Flagler, Marion, Putnam, Saint Johns | 31 min |
| Jan 19, 5:11 PM EST | Severe Thunderstorm Warning | TBW | Pasco, Pinellas | 34 min |
| Jan 19, 5:16 PM EST | Tornado Warning | TBW | Pinellas | 29 min |
| Jan 19, 5:16 PM EST | Tornado Warning | TBW | Pasco | 29 min |
| Jan 19, 5:21 PM EST | Tornado Warning | JAX | Clay, Putnam, Saint Johns | 24 min |
| Jan 19, 5:24 PM EST | Severe Thunderstorm Warning | TBW | Hillsborough, Pasco | 51 min |
| Jan 19, 5:34 PM EST | Tornado Warning | TBW | Hernando | 26 min |
| Jan 19, 5:36 PM EST | Severe Thunderstorm Warning | JAX | Flagler, Putnam, Saint Johns | 24 min |
| Jan 19, 5:38 PM EST | Tornado Warning | TBW | Pinellas | 18 min |
| Jan 19, 6:02 PM EST | Tornado Warning | TBW | Hernando, Sumter | 28 min |
| Jan 19, 6:07 PM EST | Severe Thunderstorm Warning | TBW | Hillsborough, Manatee | 53 min |
| Jan 19, 6:18 PM EST | Severe Thunderstorm Warning | TBW | Hillsborough, Polk | 42 min |
| Jan 19, 6:37 PM EST | Severe Thunderstorm Warning | MLB | Lake, Orange | 38 min |
| Jan 19, 7:25 PM EST | Severe Thunderstorm Warning | MLB | Orange, Osceola | 35 min |
| Jan 19, 7:35 PM EST | Severe Thunderstorm Warning | MLB | Brevard, Volusia | 25 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
Tampa Bay, FL (KTBW), launched 12:00Z, 8.5 hours before the alert went out and 137 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
- 13 J/kg
- Mixed-layer CIN
- -57 J/kg
- Mixed-layer LCL
- 560 m above ground
- 0-6 km bulk shear
- 56 kt
- 0-1 km storm-relative helicity
- 170 m²/s²
- 0-3 km storm-relative helicity
- 233 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 192027
SEL2
SPC WW 192027
FLZ000-CWZ000-200300-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 22
NWS STORM PREDICTION CENTER NORMAN OK
330 PM EST SAT JAN 19 2008
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
CENTRAL AND NORTHERN FLORIDA PENINSULA
COASTAL WATERS
EFFECTIVE THIS SATURDAY AFTERNOON AND EVENING FROM 330 PM UNTIL
1000 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 50 STATUTE
MILES EITHER SIDE OF A LINE FROM 80 MILES SOUTHWEST OF OCALA
FLORIDA TO 40 MILES EAST NORTHEAST OF DAYTONA BEACH FLORIDA. FOR
A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH
OUTLINE UPDATE (WOUS64 KWNS WOU2).
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...SCATTERED THUNDERSTORMS OVER THE EASTERN GULF OF MEXICO
WILL MOVE INTO THE FL PENINSULA THIS AFTERNOON AND EVENING. THESE
STORMS WILL INTERACT WITH RETREATING SURFACE WARM FRONT...WHERE
ENHANCED LOW LEVEL CONVERGENCE AND SHEAR WILL BE PRESENT. THIS MAY
RESULT IN ISOLATED SUPERCELLS CAPABLE OF DAMAGING WINDS AND A FEW
TORNADOES.
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 27035.
...HARTSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 19, 2:42 PM EST | Mesoscale Discussion | SPC | Brevard, Citrus, Flagler, Hernando, Hillsborough, Lake and 11 more | 63 min |
| Jan 19, 6:06 PM EST | Mesoscale Discussion | SPC | Flagler, Hernando, Hillsborough, Lake, Manatee, Orange and 6 more | 84 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; radar from the NEXRAD Level II archive.