Alert archive / Florida / Tornado Watches in 1998
Tornado Watch 832
The Storm Prediction Center issued this tornado watch at Sep 25, 1998, 11:00 PM EDT for 14 counties in Florida. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- Sep 25, 1998, 11:00 PM EDT (03:00 UTC)
- Expired
- Sep 26, 1998, 5:00 AM EDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
Counties Charlotte County, FL, Collier County, FL, DeSoto County, FL, Glades County, FL, Hardee County, FL, Hendry County, FL, Highlands County, FL, Hillsborough County, FL, Lee County, FL, Manatee County, FL, Monroe County, FL, Pinellas County, FL, Polk County, FL, Sarasota County, FL
The radar
The Tampa radar (KTBW), 131 km from the middle of the area, began a volume at 03:01 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
Tampa Bay, FL (KTBW), launched 00:00Z, 3.0 hours before the alert went out and 131 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
- 35 J/kg
- Mixed-layer CIN
- -83 J/kg
- Mixed-layer LCL
- 855 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- 209 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
472 WWUS9 KMKC 260232 SEL2 MKC WW 260232 FLZ000-260900- URGENT - IMMEDIATE BROADCAST REQUESTED TORNADO WATCH NUMBER 832 STORM PREDICTION CENTER NORMAN OK 1032 PM EDT FRI SEP 25 1998 THE STORM PREDICTION CENTER HAS ISSUED A TORNADO WATCH FOR PORTIONS OF WEST CENTRAL AND SOUTHWEST FLORIDA AND ADJACENT COASTAL WATERS EFFECTIVE THIS FRIDAY NIGHT AND SATURDAY MORNING FROM 1100 PM UNTIL 500 AM EDT. TORNADOES...THUNDERSTORM WIND GUSTS TO 80 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE TORNADO WATCH AREA IS ALONG AND 50 STATUTE MILES EAST AND WEST OF A LINE FROM 25 MILES NORTHEAST OF SAINT PETERSBURG FLORIDA TO 50 MILES EAST OF KEY WEST 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 830. WATCH NUMBER 830 WILL NOT BE IN EFFECT AFTER 1100 PM EDT. CONTINUE...WW 831... DISCUSSION...WIND PROFILES OVER CENTRAL AND SOUTHERN FL CONTINUE TO SHOW STRONG LOW-LEVEL SPEED SHEAR...WITH SPEEDS OF 35-40 KTS IN THE LOWEST 1000 FT. DIRECTIONAL SHEAR IS WEAK...BUT REMAINS GREATEST OVER THE FAR SRN PART OF THE STATE. GIVEN STRENGTH OF SHEAR...AND CONTINUED PRESENCE OF CONVECTIVE BANDS WITH LIGHTNING...POTENTIAL FOR LOW-LEVEL MESOCYLOGENESIS EXPECTED TO PERSIST THROUGH EARLY SATTURDAY. THREAT SHOULD DIMINISH WITH TIME AS GEORGES CONTINUES WNWWD. AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 70 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 15040. ...CORFIDI 281,0813 243,0801 243,0814 281,0831
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.