Alert archive / Florida / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 49, NWS Melbourne, FL

May 5, 1998Lake County, Orange County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at May 5, 1998, 12:29 PM EDT for Lake County, Orange County, Florida. It was in force for 41 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
May 5, 1998, 12:29 PM EDT (16:29 UTC)
Expired
May 5, 1998, 1:10 PM EDT
In force
41 min
Issued by
NWS Melbourne, FL
Area
Whole counties

Counties Lake County, FL, Orange County, FL

The radar

The Melbourne radar (KMLB), 103 km from the middle of the area, began a volume at 16:29 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.

What was reported inside it

TimeReportWhereRemark
May 5, 1:12 PM EDTHail 1Lockhart, FL

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

IssuedProductOfficeLasted
May 5, 11:30 AM EDTSevere Thunderstorm WatchSPC6 hr

The nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 4.5 hours before the alert went out and 135 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 1998-05-05Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1588 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, Tampa Bay, FL at 12:00Z on 1998-05-05The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 84 square meters per square second.19395878Sfc1 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
1588 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
808 m above ground
0-6 km bulk shear
40 kt
0-1 km storm-relative helicity
84 m²/s²
0-3 km storm-relative helicity
157 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.6

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KMLB 051629 RRA
SVRMLB
FLC069-095-051710-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
1229 PM EDT TUE MAY 5 1998

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

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

* UNTIL 110 PM EDT

* AT 1220 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 7 MILES SOUTH OF CLERMONT.  MOVEMENT WAS EAST
  AT 25 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
    HIGHWAY 27 AT 1230 PM
    DISNEY AREA AT 1240 PM



SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 58
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN.
MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STRONG BUILDING.
DECKER

The office that day

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

IssuedProductOfficeCountiesLasted
May 5, 11:46 AM EDTSevere Thunderstorm WarningMLBOsceola64 min
May 5, 1:33 PM EDTSevere Thunderstorm WarningMLBBrevard47 min
May 5, 1:49 PM EDTSevere Thunderstorm WarningMLBOrange61 min
May 5, 2:02 PM EDTSevere Thunderstorm WarningMLBSeminole63 min
May 5, 2:46 PM EDTSevere Thunderstorm WarningMLBVolusia59 min
May 5, 2:54 PM EDTSevere Thunderstorm WarningMLBLake36 min
May 5, 2:57 PM EDTSevere Thunderstorm WarningMLBOkeechobee63 min
May 5, 2:59 PM EDTSevere Thunderstorm WarningMLBOrange66 min
May 5, 3:29 PM EDTSevere Thunderstorm WarningMLBMartin61 min
May 5, 3:33 PM EDTSevere Thunderstorm WarningMLBSaint Lucie62 min
May 5, 4:30 PM EDTSevere Thunderstorm WarningMLBMartin, Saint Lucie45 min
May 5, 4:31 PM EDTSevere Thunderstorm WarningMLBMartin, Saint Lucie44 min
May 5, 5:42 PM EDTSevere Thunderstorm WarningMLBIndian River63 min

Nearby

Severe Thunderstorm Warnings in Florida, 1998Every severe thunderstorm warning in 1998

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.