Alert archive / Florida / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 33, NWS Melbourne, FL

July 20, 2002Orange County, Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 20, 2002, 3:50 PM EDT for Orange County, Osceola County, Florida. It was in force for 40 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 20, 2002, 3:50 PM EDT (19:50 UTC)
Expired
Jul 20, 2002, 4:30 PM EDT
In force
40 min
Issued by
NWS Melbourne, FL
Area
Whole counties

Counties Orange County, FL, Osceola County, FL

The radar

The Melbourne radar (KMLB), 60 km from the middle of the area, began a volume at 19:49 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 12:00Z, 7.8 hours before the alert went out and 132 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, Tampa Bay, FL at 12:00Z on 2002-07-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3682 joules per kilogram.LCLEL10008507005003002001001 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, Tampa Bay, FL at 12:00Z on 2002-07-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -22 square meters per square second.1939Sfc1 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
3682 J/kg
Mixed-layer CIN
-2 J/kg
Mixed-layer LCL
586 m above ground
0-6 km bulk shear
4 kt
0-1 km storm-relative helicity
-22 m²/s²
0-3 km storm-relative helicity
20 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

829 
WUUS52 KMLB 201950
SVRMLB
FLC095-097-202030-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
348 PM EDT SAT JUL 20 2002

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN ORANGE COUNTY
  NORTHEASTERN OSCEOLA COUNTY
  IN EAST CENTRAL FLORIDA

* UNTIL 430 PM EDT.

* AT 348 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER SOUTHEASTERN ORANGE COUNTY...OR ABOUT 8
  MILES WEST OF LONE CABBAGE FISH CAMP.  THE STORM WAS NEARLY
  STATIONARY.

* THE SEVERE THUNDERSTORM WILL AFFECT...
RURAL SOUTHEASTERN ORANGE COUNTY AND RURAL NORTHERN OSCEOLA COUNTY 
THROUGH 430 PM EDT

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.

$$

LAT...LON 2848 8100 2839 8114 2818 8097 2836 8089

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 20, 2:45 PM EDTSpecial Marine WarningMLB105 min
Jul 20, 2:45 PM EDTSpecial Marine WarningMLB105 min
Jul 20, 2:51 PM EDTSevere Thunderstorm WarningMLBBrevard54 min
Jul 20, 4:27 PM EDTSevere Thunderstorm WarningMLBOrange, Osceola63 min
Jul 20, 4:56 PM EDTSevere Thunderstorm WarningMLBSeminole34 min
Jul 20, 5:52 PM EDTSevere Thunderstorm WarningMLBLake53 min

Nearby

Severe Thunderstorm Warnings in Florida, 2002Every 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.