Alert archive / Florida / Tornado Watches in 2007
Tornado Watch 327
The Storm Prediction Center issued this tornado watch at Jun 1, 2007, 11:32 PM EDT for 7 counties in Florida. It was in force for 8 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 1, 2007, 11:32 PM EDT (03:32 UTC)
- Expired
- Jun 2, 2007, 8:00 AM EDT
- In force
- 8 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 0.5 in
- Strongest gust expected
- 60 kt
Counties Broward County, FL, Collier County, FL, Glades County, FL, Hendry County, FL, Miami-Dade County, FL, Monroe County, FL, Palm Beach County, FL
The radar
The Miami radar (KAMX), 79 km from the middle of the area, began a volume at 03:32 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
- 30%
- One or more EF2 to EF5 tornadoes
- 20%
- Ten or more severe wind reports
- 10%
- One or more gusts of 65 knots or more
- 10%
- 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
1 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 11:58 PM EDT | Tornado Warning | KEY | Monroe | 21 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
Miami, FL (KMFL), launched 00:00Z, 3.5 hours before the alert went out and 83 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
- 224 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 531 m above ground
- 0-6 km bulk shear
- 30 kt
- 0-1 km storm-relative helicity
- 182 m²/s²
- 0-3 km storm-relative helicity
- 357 m²/s²
- Significant tornado parameter
- 0.3
- Supercell composite
- 2.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
WWUS20 KWNS 020331
SEL7
SPC WW 020331
FLZ000-CWZ000-021200-
URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 327
NWS STORM PREDICTION CENTER NORMAN OK
1130 PM EDT FRI JUN 1 2007
THE NWS STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF
SOUTH FLORIDA INCLUDING THE KEYS
COASTAL WATERS
EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1130 PM
UNTIL 800 AM 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 60 STATUTE
MILES EAST AND WEST OF A LINE FROM 50 MILES EAST NORTHEAST OF
FORT MEYERS FLORIDA TO 30 MILES EAST SOUTHEAST OF MARATHON
FLORIDA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE
ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU7).
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 324...WW 325...WW 326...
DISCUSSION...ISOLATED THUNDERSTORMS ARE INCREASING IN NUMBER ACROSS
FAR SOUTH FL AND OFFSHORE...IN REGION OF STRONG LOW LEVEL SHEAR.
ACTIVITY MAY PERSIST THROUGH MUCH OF THE NIGHT WITH THE RISK OF
ISOLATED AND BRIEF 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 18020.
...HARTSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 1, 11:03 PM EDT | Mesoscale Discussion | SPC | Broward, Collier, Miami-Dade, Monroe | 57 min |
| Jun 2, 5:34 AM EDT | Mesoscale Discussion | SPC | Brevard, Broward, Charlotte, Citrus, Collier, DeSoto and 25 more | 56 min |
| Jun 2, 6:49 AM EDT | Tornado Watch | SPC | Brevard, Charlotte, Citrus, DeSoto, Flagler, Hardee and 20 more | 8 hr |
| Jun 2, 9:04 AM EDT | Mesoscale Discussion | SPC | Broward, Collier, Glades, Hendry, Martin, Miami-Dade and 3 more | 56 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.