Alert archive / Florida / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 37, NWS Melbourne, FL

July 21, 2002Orange County, Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 21, 2002, 3:06 PM EDT for Orange County, Osceola County, Florida. It was in force for 49 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 21, 2002, 3:06 PM EDT (19:06 UTC)
Expired
Jul 21, 2002, 3:55 PM EDT
In force
49 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 19:06 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

Jacksonville, FL (KNIP), launched 12:00Z, 7.1 hours before the alert went out and 250 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 2002-07-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 231 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 2002-07-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 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
231 J/kg
Mixed-layer CIN
-174 J/kg
Mixed-layer LCL
1181 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
24 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.

793 
WUUS52 KMLB 211906
SVRMLB
FLC095-097-211955-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
305 PM EDT SUN JUL 21 2002

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 355 PM EDT.

* AT 302 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  A SEVERE THUNDERSTORM OVER KISSIMMEE...MOVING EAST AT 10 MPH. OTHER
  SEVERE STORMS WERE DEVELOPING OVER ORLANDO AND MOVING EAST.

* OTHER LOCATIONS IN THE WARNING INCLUDE BELLE ISLE...LAKE MARY JANE
  AND PINE CASTLE

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 2858 8140 2827 8149 2812 8088 2846 8089

VOLKMER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 21, 12:22 PM EDTSpecial Marine WarningMLB98 min
Jul 21, 2:00 PM EDTSpecial Marine WarningMLB90 min
Jul 21, 2:27 PM EDTTornado WarningMLBOsceola33 min
Jul 21, 3:51 PM EDTSpecial Marine WarningMLB114 min
Jul 21, 3:51 PM EDTSpecial Marine WarningMLB114 min
Jul 21, 4:40 PM EDTSpecial Marine WarningMLB65 min
Jul 21, 4:40 PM EDTSpecial Marine WarningMLB65 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.