Alert archive / Georgia / Tornado Watches in 2000

Tornado Watch 137

March 30, 20009 counties in Florida; 18 counties in Georgia

The Storm Prediction Center issued this tornado watch at Mar 30, 2000, 12:15 PM EST for 9 counties in Florida; 18 counties in Georgia. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued: Mar 30, 2000, 12:15 PM EST (17:15 UTC)
Expired: Mar 30, 2000, 6:00 PM EST
In force: 6 hr
Issued by: the Storm Prediction Center

All 27 counties

Baker County, FL, Columbia County, FL, Duval County, FL, Hamilton County, FL, Jefferson County, FL, Leon County, FL, Madison County, FL, Nassau County, FL, Suwannee County, FL, Atkinson County, GA, Berrien County, GA, Brantley County, GA, Brooks County, GA, Camden County, GA, Charlton County, GA, Clinch County, GA, Colquitt County, GA, Cook County, GA, Echols County, GA, Glynn County, GA, Grady County, GA, Lanier County, GA, Lowndes County, GA, Mitchell County, GA, Pierce County, GA, Thomas County, GA, Ware County, GA

Warnings issued inside it

13 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

Issued	Product	Office	Counties	Lasted
Mar 30, 12:24 PM EST	Severe Thunderstorm Warning	JAX	Baker, Columbia	66 min
Mar 30, 12:40 PM EST	Tornado Warning	JAX	Columbia, Hamilton	35 min
Mar 30, 1:03 PM EST	Severe Thunderstorm Warning	TAE	Jefferson, Madison	42 min
Mar 30, 1:21 PM EST	Tornado Warning	JAX	Nassau	39 min
Mar 30, 1:30 PM EST	Tornado Warning	JAX	Camden	30 min
Mar 30, 1:40 PM EST	Tornado Warning	JAX	Baker	20 min
Mar 30, 1:55 PM EST	Tornado Warning	JAX	Duval, Nassau	35 min
Mar 30, 2:04 PM EST	Tornado Warning	JAX	Suwannee	26 min
Mar 30, 2:22 PM EST	Tornado Warning	JAX	Charlton	38 min
Mar 30, 2:28 PM EST	Tornado Warning	JAX	Nassau	32 min
Mar 30, 2:31 PM EST	Tornado Warning	JAX	Suwannee	29 min
Mar 30, 2:45 PM EST	Tornado Warning	JAX	Columbia	45 min
Mar 30, 2:56 PM EST	Tornado Warning	JAX	Duval, Nassau	34 min

The nearest sounding before it

Tallahassee Rgnl, FL (KTLH), launched 12:00Z, 5.3 hours before the alert went out and 123 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 1322 J/kg
Mixed-layer CIN: -44 J/kg
Mixed-layer LCL: 514 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: 229 m²/s²
0-3 km storm-relative helicity: 321 m²/s²
Significant tornado parameter: 2.1
Supercell composite: 8.8

Open this sounding in Storm Lab

The text

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

106 
WWUS9 KMKC 301645
SEL7  
MKC WW 301641
FLZ000-GAZ000-CWZ000-302300-

URGENT - IMMEDIATE BROADCAST REQUESTED
TORNADO WATCH NUMBER 137
STORM PREDICTION CENTER NORMAN OK
1141 AM EST THU MAR 30 2000

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

   NORTHERN FLORIDA                            
   SOUTHERN GEORGIA                            
   COASTAL WATERS                     

EFFECTIVE THIS THURSDAY AFTERNOON AND EVENING FROM 1215 PM UNTIL
600 PM EST.

TORNADOES...HAIL TO 2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS
TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS.

THE TORNADO WATCH AREA IS ALONG AND 45 STATUTE MILES NORTH AND
SOUTH OF A LINE FROM 40 MILES SOUTHWEST OF MOULTRIE GEORGIA TO 25
MILES NORTHEAST OF JACKSONVILLE 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.


DISCUSSION...STORMS ARE INCREASING IN VERY MOIST AND UNSTABLE
AIRMASS ACROSS SWRN GA INTO FL PANHANDLE.  LOCAL VAD WIND PROFILES
SUPPORT SUPER CELLS AND ISOLATED TORNADOES...PARTICULARLY VICINITY
E/W FRONTAL BOUNDARY SRN GA.


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 26035.


...HALES

311,0841 312,0812 300,0812 300,0841

SPC that day

Everything else SPC issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Mar 29, 7:00 PM EST	Tornado Watch	SPC	Bay, Calhoun, Escambia, Franklin, Gadsden, Gulf and 12 more	6 hr
Mar 30, 5:45 PM EST	Tornado Watch	SPC	Alachua, Baker, Bradford, Citrus, Clay, Columbia and 18 more	5 hr

Nearby

Tornado Watches in Georgia, 2000 Tornado Watches in Florida, 2000 Every 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.