Alert archive / Florida / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 50, NWS Melbourne, FL

December 13, 2002Okeechobee County, Saint Lucie County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Dec 13, 2002, 12:19 PM EST for Okeechobee County, Saint Lucie County, Florida. It was in force for 7 days. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Dec 13, 2002, 12:19 PM EST (17:19 UTC)
Expired: Dec 20, 2002, 9:45 AM EST
In force: 7 days
Issued by: NWS Melbourne, FL
Area: Counties, with a storm outline in the text

Counties Okeechobee County, FL, Saint Lucie County, FL

The radar

The Melbourne radar (KMLB), 47 km from the middle of the area, began a volume at 17:20 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Dec 13, 11:55 AM EST	Tornado Watch	SPC	4 hr

The nearest sounding before it

Cape Canaveral, FL (KXMR), launched 12:00Z, 5.3 hours before the alert went out and 72 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: 1011 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 620 m above ground
0-6 km bulk shear: 50 kt
0-1 km storm-relative helicity: 253 m²/s²
0-3 km storm-relative helicity: 292 m²/s²
Significant tornado parameter: 1.3
Supercell composite: 10.1

Open this sounding in Storm Lab

The text

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

852 
WUUS52 KMLB 131719
SVRMLB
FLC093-111-131800-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
1218 PM EST FRI DEC 13 2002

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  OKEECHOBEE COUNTY
  ST. LUCIE COUNTY
  IN EAST CENTRAL FLORIDA

* UNTIL 100 PM EST

* AT 1215 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER THE TOWN OF OKEECHOBEE...MOVING NORTHEAST 
  AT 40 MPH.

* THE SEVERE THUNDERSTORMS WILL MOVE ACROSS EASTERN OKEECHOBEE AND 
INTO WESTERN ST LUCIE COUNTIES THROUGH 1245 PM...AND APPROACH THE 
SAINT LUCIE COUNTY COAST THROUGH 1 PM.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MILES AN
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. IF
THE STORM APPROACHES YOU...MOVE TO AN INTERIOR ROOM ON THE LOWEST
FLOOR.

A TORNADO WATCH REMAINS IN EFFECT UNTIL 400 PM EST FRIDAY AFTERNOON 
FOR PARTS OF EAST CENTRAL FLORIDA.

$$

LAT...LON 2726 8095 2713 8080 2737 8049 2753 8067

52

The office that day

Everything else NWS Melbourne, FL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Dec 12, 11:09 PM EST	Special Marine Warning	MLB		2 hr
Dec 13, 7:21 AM EST	Special Marine Warning	MLB		114 min
Dec 13, 8:26 AM EST	Tornado Warning	MLB	Volusia	34 min
Dec 13, 8:55 AM EST	Special Marine Warning	MLB		2 hr
Dec 13, 9:02 AM EST	Tornado Warning	MLB	Brevard, Volusia	28 min
Dec 13, 10:46 AM EST	Severe Thunderstorm Warning	MLB	Brevard	44 min
Dec 13, 10:53 AM EST	Special Marine Warning	MLB		67 min
Dec 13, 10:53 AM EST	Special Marine Warning	MLB		67 min
Dec 13, 11:15 AM EST	Special Marine Warning	MLB		2 hr
Dec 13, 11:15 AM EST	Special Marine Warning	MLB		2 hr
Dec 13, 11:35 AM EST	Severe Thunderstorm Warning	MLB	Brevard, Indian River	55 min
Dec 13, 1:00 PM EST	Special Marine Warning	MLB		90 min

Nearby

Severe Thunderstorm Warnings in Florida, 2002 Every severe thunderstorm warning in 2002

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.