Alert archive / Florida / Tornado Watches in 1997
Tornado Watch 808
The Storm Prediction Center issued this tornado watch at Dec 27, 1997, 9:30 AM EST for 12 counties in Florida. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Dec 27, 1997, 9:30 AM EST (14:30 UTC)
- Expired
- Dec 27, 1997, 4:00 PM EST
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
Counties Broward County, FL, Collier County, FL, Glades County, FL, Hendry County, FL, Indian River County, FL, Lee County, FL, Martin County, FL, Miami-Dade County, FL, Monroe County, FL, Okeechobee County, FL, Palm Beach County, FL, Saint Lucie County, FL
The radar
The Miami radar (KAMX), 101 km from the middle of the area, began a volume at 14:29 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.
The nearest sounding before it
Miami, FL (KMFL), launched 12:00Z, 2.5 hours before the alert went out and 90 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
- 850 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 678 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 149 m²/s²
- Significant tornado parameter
- 0.5
- Supercell composite
- 5.2
The text
As transmitted, in the capitals the NWS used until 2016.
125 WWUS9 KMKC 271353 SEL8 MKC WW 271353 FLZ000-272100- BULLETIN - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 808 STORM PREDICTION CENTER NORMAN OK 853 AM EST SAT DEC 27 1997 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF SOUTH FLORIDA AND ADJACENT COASTAL WATERS EFFECTIVE THIS SATURDAY MORNING AND AFTERNOON FROM 930 AM UNTIL 400 PM EST. TORNADOES...HAIL TO 1 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 75 STATUTE MILES EITHER SIDE OF A LINE FROM 85 MILES WEST SOUTHWEST OF MIAMI FLORIDA TO 55 MILES EAST OF VERO BEACH FLORIDA. 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...THIS TORNADO WATCH REPLACES TORNADO WATCH NUMBER 807. WATCH NUMBER 807 WILL NOT BE IN EFFECT AFTER 930 AM EST. DISCUSSION...TROPICAL AIRMASS S FL AHEAD OF PRE FRONTAL LINE OF THUNDERSTORMS WILL SUPPORT ADDITIONAL DEVELOPMENT OF SEVERE THUNDERSTORMS/SUPERCELLS. WIND PROFILES FORECASTED TO BE FAVORABLE FOR SUPERCELLS AND ISOLATED TORNADOES WITH LOW LEVEL JET UP TO 60 KTS WITH APPROACHING MID LEVEL JET TO 90KT ASSOCIATED WITH STRONG SHORT WAVE TROF TRACKING ACROSS AL/GA DURING AFTERNOON. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 24040. ...HALES 260,0822 281,0802 265,0783 244,0803
SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 27, 4:00 AM EST | Tornado Watch | SPC | Alachua, Baker, Bradford, Brevard, Citrus, Clay and 31 more | 6 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.