Alert archive / Florida / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 36, NWS Melbourne, FL

July 20, 2002Lake County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jul 20, 2002, 5:52 PM EDT for Lake County, Florida. It was in force for 53 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, 5:52 PM EDT (21:52 UTC)
Expired
Jul 20, 2002, 6:45 PM EDT
In force
53 min
Issued by
NWS Melbourne, FL
Area
Whole counties

County Lake County, FL

The radar

The Melbourne radar (KMLB), 126 km from the middle of the area, began a volume at 21:52 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, 9.9 hours before the alert went out and 136 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°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.

735 
WUUS52 KMLB 202152
SVRMLB
FLC069-202245-

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

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  LAKE COUNTY
  IN EAST CENTRAL FLORIDA

* UNTIL 645 PM EDT.

AT 550 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
SEVERE THUNDERSTORM ALONG THE ORANGE AND LAKE COUNTY LINE...4 MILES 
NORTH OF ZELLWOOD...MOVING NORTH AT 5 MPH.

ANOTHER SEVERE THUNDERSTORM WAS DEVELOPING OVER SOUTHERN LAKE 
COUNTY NEAR MASCOTTE AND WAS NEARLY STATIONARY.

IN ADDITION...LAKE COUNTY LAW ENFORCEMENT RELAYED A PUBLIC REPORT OF 
A FUNNEL CLOUD NEAR LEESBURG AT 550 PM.

* SOME LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE... MOUNT 
DORA...EUSTIS...UMATILLA...FOREST HILLS...AND MASCOTTE.

HAIL UP TO ONE INCH IN DIAMETER AND WINDS GREATER THAN 55 MILES AN
HOUR ARE EXPECTED FROM THESE STORMS. SEEK SHELTER IN A STURDY 
STRUCTURE UNTIL THE STORM HAS PASSED. IN ADDITION...RAINFALL OF 2 
INCHES IN AN HOUR...AND FREQUENT LIGHTNING WILL ACCOMPANY THE STORMS.

EARLIER...ONE OF THESE STORMS DOWNED SEVERAL LARGE TREES IN THE 
WEKIVA SPRINGS STATE PARK.

STAY TUNED TO LOCAL MEDIA OUTLETS OR NOAA WEATHER RADIO FOR THE
LATEST SEVERE WEATHER INFORMATION.

$$

LAT...LON 2878 8171 2878 8150 2903 8138 2905 8166

SMS

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, 3:50 PM EDTSevere Thunderstorm WarningMLBOrange, Osceola40 min
Jul 20, 4:27 PM EDTSevere Thunderstorm WarningMLBOrange, Osceola63 min
Jul 20, 4:56 PM EDTSevere Thunderstorm WarningMLBSeminole34 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.