Alert archive / Florida / Tornado Watches in 2014
Tornado Watch 42
The Storm Prediction Center issued this tornado watch at Mar 29, 2014, 9:43 AM EDT for 24 counties in Florida. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Mar 29, 2014, 9:43 AM EDT (13:43 UTC)
- Expired
- Mar 29, 2014, 5:00 PM EDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 24 counties
Alachua County, FL, Brevard County, FL, Citrus County, FL, Flagler County, FL, Gilchrist County, FL, Hardee County, FL, Hernando County, FL, Hillsborough County, FL, Indian River County, FL, Lake County, FL, Levy County, FL, Manatee County, FL, Marion County, FL, Orange County, FL, Osceola County, FL, Pasco County, FL, Pinellas County, FL, Polk County, FL, Putnam County, FL, Saint Johns County, FL, Sarasota County, FL, Seminole County, FL, Sumter County, FL, Volusia County, FL
The radar
The Tampa radar (KTBW), 127 km from the middle of the area, began a volume at 13:45 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
- 20%
- Ten or more severe wind reports
- 60%
- One or more gusts of 65 knots or more
- 10%
- Ten or more severe hail reports
- 60%
- One or more hailstones of 2 inches or more
- 30%
- Six or more combined severe hail and wind reports
- 80%
Warnings issued inside it
18 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 29, 11:13 AM EDT | Severe Thunderstorm Warning | TBW | Citrus, Hernando | 47 min |
| Mar 29, 11:33 AM EDT | Severe Thunderstorm Warning | JAX | Alachua, Clay, Putnam | 42 min |
| Mar 29, 11:46 AM EDT | Tornado Warning | TBW | Citrus, Hernando | 29 min |
| Mar 29, 11:59 AM EDT | Severe Thunderstorm Warning | TBW | Citrus, Hernando, Sumter | 46 min |
| Mar 29, 12:49 PM EDT | Severe Thunderstorm Warning | MLB | Lake, Orange | 56 min |
| Mar 29, 1:03 PM EDT | Severe Thunderstorm Warning | MLB | Lake, Orange, Seminole, Volusia | 57 min |
| Mar 29, 1:07 PM EDT | Severe Thunderstorm Warning | MLB | Lake, Orange, Osceola | 53 min |
| Mar 29, 1:23 PM EDT | Severe Thunderstorm Warning | MLB | Lake, Volusia | 52 min |
| Mar 29, 1:27 PM EDT | Severe Thunderstorm Warning | TBW | Pinellas | 48 min |
| Mar 29, 1:30 PM EDT | Tornado Warning | MLB | Lake, Orange, Seminole | 60 min |
| Mar 29, 1:52 PM EDT | Severe Thunderstorm Warning | TBW | Polk | 38 min |
| Mar 29, 2:00 PM EDT | Severe Thunderstorm Warning | MLB | Volusia | 45 min |
| Mar 29, 2:09 PM EDT | Severe Thunderstorm Warning | MLB | Orange, Osceola | 51 min |
| Mar 29, 2:12 PM EDT | Tornado Warning | MLB | Brevard, Orange, Osceola | 63 min |
| Mar 29, 2:50 PM EDT | Severe Thunderstorm Warning | MLB | Brevard, Indian River, Osceola | 55 min |
| Mar 29, 3:10 PM EDT | Severe Thunderstorm Warning | TBW | Polk | 35 min |
| Mar 29, 3:12 PM EDT | Severe Thunderstorm Warning | MLB | Brevard | 33 min |
| Mar 29, 3:49 PM EDT | Severe Thunderstorm Warning | MLB | Brevard, Indian River, Okeechobee, Osceola, Saint Lucie | 41 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, 1.7 hours before the alert went out and 127 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
- 1212 J/kg
- Mixed-layer CIN
- -48 J/kg
- Mixed-layer LCL
- 736 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 344 m²/s²
- 0-3 km storm-relative helicity
- 461 m²/s²
- Significant tornado parameter
- 2.3
- Supercell composite
- 11.6
The text
As transmitted, in the capitals the NWS used until 2016.
552
WWUS20 KWNS 291342
SEL2
SPC WW 291342
FLZ000-CWZ000-292100-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 42
NWS STORM PREDICTION CENTER NORMAN OK
945 AM EDT SAT MAR 29 2014
THE NWS STORM PREDICTION CENTER HAS ISSUED A
* TORNADO WATCH FOR PORTIONS OF
CENTRAL FLORIDA
COASTAL WATERS
* EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 945 AM UNTIL
500 PM EDT.
* PRIMARY THREATS INCLUDE...
SEVERAL TORNADOES POSSIBLE
SEVERAL LARGE HAIL EVENTS LIKELY WITH A FEW VERY LARGE HAIL
EVENTS TO 2 INCHES IN DIAMETER POSSIBLE
SEVERAL DAMAGING WIND GUSTS TO 70 MPH LIKELY
THE TORNADO WATCH AREA IS APPROXIMATELY ALONG AND 80 STATUTE
MILES EAST AND WEST OF A LINE FROM 10 MILES NORTHEAST OF
GAINESVILLE FLORIDA TO 20 MILES SOUTH SOUTHWEST OF AVON PARK
FLORIDA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
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 CURRENTLY OVER THE GULF OF
MEXICO WILL TRACK EASTWARD AND ACROSS CENTRAL FL TODAY. BREAKS IN
THE CLOUDS COUPLED WITH DEWPOINTS IN THE 70S WILL YIELD MODERATE
INSTABILITY...WHILE LOW LEVEL VERTICAL SHEAR IS FAVORABLE FOR
SUPERCELL STRUCTURES. LARGE HAIL...DAMAGING WINDS...AND ISOLATED
TORNADOES ARE POSSIBLE.
AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE
WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO
500. MEAN STORM MOTION VECTOR 27030.
...HARTSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 29, 5:58 AM EDT | Mesoscale Discussion | SPC | Baker, Columbia, Dixie, Franklin, Gilchrist, Gulf and 9 more | 2 hr |
| Mar 29, 8:10 AM EDT | Mesoscale Discussion | SPC | Citrus, Flagler, Hernando, Hillsborough, Lake, Levy and 8 more | 2 hr |
| Mar 29, 11:38 AM EDT | Mesoscale Discussion | SPC | Brevard, Citrus, Clay, Duval, Flagler, Hardee and 15 more | 97 min |
| Mar 29, 2:25 PM EDT | Mesoscale Discussion | SPC | Brevard, Charlotte, Collier, DeSoto, Glades, Hardee and 16 more | 95 min |
| Mar 29, 3:42 PM EDT | Severe Thunderstorm Watch | SPC | Broward, Collier, Glades, Hendry, Martin, Miami-Dade and 4 more | 6 hr |
| Mar 29, 7:25 PM EDT | Mesoscale Discussion | SPC | Broward, Miami-Dade, Monroe | 2 hr |
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.