Alert archive / Florida / Tornado Watches in 2000

Tornado Watch 138

March 30, 200024 counties in Florida; 7 counties in Georgia

The Storm Prediction Center issued this tornado watch at Mar 30, 2000, 5:45 PM EST for 24 counties in Florida; 7 counties in Georgia. It was in force for 5 hr.

The area

The outline as issued.

The facts

Issued
Mar 30, 2000, 5:45 PM EST (22:45 UTC)
Expired
Mar 30, 2000, 11:00 PM EST
In force
5 hr
Issued by
the Storm Prediction Center
All 31 counties

Alachua County, FL, Baker County, FL, Bradford County, FL, Citrus County, FL, Clay County, FL, Columbia County, FL, Dixie County, FL, Flagler County, FL, Gadsden County, FL, Gilchrist County, FL, Hamilton County, FL, Jackson County, FL, Jefferson County, FL, Lafayette County, FL, Leon County, FL, Levy County, FL, Madison County, FL, Marion County, FL, Putnam County, FL, Suwannee County, FL, Taylor County, FL, Union County, FL, Volusia County, FL, Wakulla County, FL, Brooks County, GA, Decatur County, GA, Echols County, GA, Grady County, GA, Lowndes County, GA, Seminole County, GA, Thomas County, GA

The nearest sounding before it

Jacksonville, FL (KJAX), launched 12:00Z, 10.8 hours before the alert went out and 129 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.

Skew-T log-pSkew-T log-p diagram, Jacksonville, FL at 12:00Z on 2000-03-30Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 70 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Jacksonville, FL at 12:00Z on 2000-03-30The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 384 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
70 J/kg
Mixed-layer CIN
-233 J/kg
Mixed-layer LCL
1195 m above ground
0-6 km bulk shear
60 kt
0-1 km storm-relative helicity
384 m²/s²
0-3 km storm-relative helicity
471 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

528 
WWUS9 KMKC 302248
SEL8  

SEL8  
MKC WW 302240
FLZ000-GAZ000-CWZ000-310400-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 138
STORM PREDICTION CENTER NORMAN OK
440 PM CST THU MAR 30 2000

THE STORM PREDICTION CENTER HAS ISSUED A
TORNADO WATCH FOR PORTIONS OF

   NORTH FLORIDA                            
   EXTREME SOUTHWEST GEORGIA                            
   COASTAL WATERS                     

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 445 PM UNTIL
1000 PM CST.

TORNADOES...HAIL TO 1 INCH IN DIAMETER...THUNDERSTORM WIND GUSTS TO
60 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 75 STATUTE MILES EAST AND WEST
OF A LINE FROM 40 MILES NORTH OF TALAHASSEE FLORIDA TO 40 MILES
SOUTHWEST OF DAYTONA 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...  CONTINUE...WW 137...

DISCUSSION...THREAT FOR SUPERCELLS AND ISOLATED TORNADOES THIS
EVENING AS STORMS DEVELOP INVOF WEAK SURFACE WAVE W OF TLH AND MOVE
E OR ESEWD.  MODERATE UNIDIRECTIONAL SHEAR ALOFT...COUPLED WITH
MOIST ELY FLOW JUST N OF STALLING WNW/ESE-ORIENTED OUTFLOW BOUNDARY
ALONG WATCH AXIS...WILL FAVOR STORM ROTATION.

AVIATION...TORNADOES AND A FEW SEVERE THUNDERSTORMS WITH HAIL
SURFACE AND ALOFT TO 1 INCH  EXTREME TURBULENCE AND SURFACE WIND
GUSTS TO 50 KNOTS.  A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. 
MEAN STORM MOTION VECTOR 28035.

...CORFIDI

305,0830 284,0801 284,0824 305,0853

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Mar 29, 7:00 PM ESTTornado WatchSPCBay, Calhoun, Escambia, Franklin, Gadsden, Gulf and 12 more6 hr
Mar 30, 12:15 PM ESTTornado WatchSPCBaker, Columbia, Duval, Hamilton, Jefferson, Leon and 3 more6 hr

Nearby

Tornado Watches in Florida, 2000Tornado Watches in Georgia, 2000Every tornado watch in 2000

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.