Alert archive / Florida / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 93, NWS Melbourne, FL

June 22, 1999Orange County, Osceola County, Florida

NWS Melbourne, FL issued this severe thunderstorm warning at Jun 22, 1999, 4:31 PM EDT for Orange County, Osceola County, Florida. It was in force for 49 min. 2 reports 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
Jun 22, 1999, 4:31 PM EDT (20:31 UTC)
Expired
Jun 22, 1999, 5:20 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 20:33 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
Jun 22, 4:40 PM EDTHail 1Orlando, FL
Jun 22, 4:50 PM EDTThunderstorm Wind 60Kissimmee, FLThunderstorm winds blew down trees and signs and blew shingles off of roofs in Kissimmee.

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 nearest sounding before it

Tampa Bay, FL (KTBW), launched 12:00Z, 8.5 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 1999-06-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 40 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 1999-06-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 44 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
40 J/kg
Mixed-layer CIN
-102 J/kg
Mixed-layer LCL
1060 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
44 m²/s²
0-3 km storm-relative helicity
45 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.

973 
WUUS01 KMLB 222032 RRA
SVRMLB
FLC095-097-222120-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
431 PM EDT TUE JUN 22 1999

THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

     SOUTH CENTRALN ORANGE COUNTY IN EAST CENTRAL FLORIDA
     NORTHWESTERN OSCEOLA COUNTY IN EAST CENTRAL FLORIDA

* UNTIL 520 PM EDT

* AT 430 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM NEAR PINE CASTLE AND MORNINGSIDE PARK.
  MOVEMENT WAS SOUTH TO SOUTHEAST AT 10 MPH .

* THE SEVERE THUNDERSTORM WILL BE NEAR...
    KISSIMMEE BY 450 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.

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Melbourne, FL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 22, 2:15 PM EDT, 2 hours 16 minutes earlier.

Area forecast discussion, Jun 22, 2:15 PM EDT, 2 hours 16 minutes before
EAST CENTRAL FLORIDA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MELBOURNE FL
215 PM EDT TUE JUN 22 1999

SHORT TERM...WITH A SEA BREEZE HAVING DEVELOPED ALONG THE COAST AND
PUSHING INLAND...AND A WEAK PRESSURE GRADIENT ALONG THE EAST COAST
THE SEA BREEZE WILL WORK INLAND DURING THE AFTERNOON. HIGH
PRECIPITABLE WATER...AROUND 2 INCHES...AND A LIGHT STEERING WIND
FLOW WILL MAKE FOR SLOW MOVING PRECIPITATION THIS AFTERNOON AND
EVENING. WEAKENING MID AND UPPER LEVEL DYNAMICS WARRANT ONLY A 20
PERCENT CHANCE THIS EVENING AND OVERNIGHT. PERSISTENCE WITH
TEMPERATURES. THANKS FOR THE COORDINATION MIA.

LONG TERM...MODELS ARE IN GENERAL AGREEMENT IN MOVING UPPER RIDGE
AXIS ACROSS WESTERN GULF BY THURSDAY. MODELS ALSO INDICATE WEAK TROF
CONTINUING TO KEEP THE FA IN A NORTH TO NORTHEAST WIND FLOW IN THE
LOWER LEVELS THRU THE FORECAST PERIODS. MODEL PWAT VALUES WILL ALSO
REMAIN LOWER THAN RECENTLY...DROPPING TO AROUND OR SLIGHTLY BELOW
1.5 INCHES.

AS THE SURFACE HIGH SLOWLY SHIFTS EASTWARD WITH TIME OFF THE
ATLANTIC COAST THRU THURSDAY...EXPECT BEST TSRA DEVELOPMENT INLAND
ON WEDNESDAY. WITH THE HIGH POSSIBLY AFFECTING NE PORTION OF THE FA
MORE BY THURSDAY...THE EAST COAST SEA BREEZE MAY BE PUSHED FURTHER
INLAND...RESULTING IN LESSER POPS FOR THU. ETA/NGM/AVN CONTINUE TO
HINT AT THIS AND WILL FOLLOW TOWARD THIS SOLUTION.
OTHERWISE...BASICALLY TYPICAL WEATHER FOR THIS TIME OF THE YEAR.

MARINE...QUIET MARINE FORECAST. WILL REMAIN NEARLY THE SAME AS GOING
FORECAST AND WILL KEEP WINDS GENERALLY NE TO E WITH SEAS 2 FEET OR
LESS THRU THE FORECAST PERIODS.

PRELIMINARY NUMBERS...
DAB BB 072/086 071/088 072 11243
MCO BB 071/090 072/091 073 11243
MLB BB 073/087 074/087 074 11243

.MLB...NONE.

WIMMER/TROUTMAN

Nearby

Severe Thunderstorm Warnings in Florida, 1999Every severe thunderstorm warning in 1999

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.