Alert archive / Florida / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 112, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Aug 1, 1999, 5:16 PM EDT for Orange County, Osceola County, Florida. It was in force for 49 min. 3 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
- Aug 1, 1999, 5:16 PM EDT (21:16 UTC)
- Expired
- Aug 1, 1999, 6:05 PM EDT
- In force
- 49 min
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
Counties Orange County, FL, Osceola County, FL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 1, 5:45 PM EDT | Hail 1.75 | Kissimmee, FL | |
| Aug 1, 5:57 PM EDT | Hail 0.75 | Orlando, FL | |
| Aug 1, 6:10 PM EDT | Thunderstorm Wind 50 | Kissimmee, FL | Thunderstorm winds damaged roofs and blew trees down on buildings 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, 9.3 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.
- Mixed-layer CAPE
- 2171 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 910 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 46 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000
TTAA00 KMLB 012117 RRA
SVRMLB
FLC095-097-012205-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
516 PM EDT SUN AUG 1 1999
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
SOUTHWESTERN ORANGE COUNTY IN EAST CENTRAL FLORIDA
WESTERN OSCEOLA COUNTY IN EAST CENTRAL FLORIDA
* UNTIL 605 PM EDT
* AT 517 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM ABOUT 3 MILES NORTHWEST OF EPCOT IN THE DISNEY
COMPLEX. MOVEMENT WAS SOUTHWEST AT 5 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
EPCOT BY 530 PM...MGM STUDIOS AND MAGIC KINGDOM BY 535 PM AND
INTO FAR WESTERN OSCEOLA COUNTY BY 550 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.
$$
TROUTMANWhat 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 Aug 1, 3:30 PM EDT, 1 hour 46 minutes earlier.
Area forecast discussion, Aug 1, 3:30 PM EDT, 1 hour 46 minutes before
EAST CENTRAL FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MELBOURNE FL 330 PM EDT SUN AUG 1 1999 CURRENTLY...HIGH AND DRY OVER MOST OF CWA...KMLB AND KDAB RECORD HI TEMPS TEETERING ON THE BRINK OF EXTINCTION. SCT RW/TRW FORMING ALONG A THETA-E RIDGE NORTH OF THE CAPE AND OVER NRN PEN. WRLY FLOW...STRONGER THAN EXPECTED...IS SUPPRESSING ECSB FORMATION AND APPEARS UNLIKELY N OF THE CAPE ATTM. TONIGHT...SIMILAR PATTERN AS THE PAST FEW DAYS. DIURNAL CONVECTION WILL DIE OFF AFTER SUNSET. SFC TROF OVER ERN SEABOARD WILL COMBINE WITH THE SUBTROPICAL RIDGE OVER SRN PEN TO KEEP LIGHT WRLY FLOW AND HIGH DEWPOINTS IN PLACE. EXPECT OVERNIGHT TEMPS TO CONTINUE IN THE MID 70S. MON/MON NIGHT...SOME INDICATION OF A BREAK IN THE PATTERN AS A LARGE BUBBLE OF COOLER AIR DIVES OUT OF CANADA AND INTO THE MIDWEST. THE CANADIAN HI WILL MOVE ACROSS THE MIDWEST...WHILE THE ATLC HI PRES DRIFTS SLIGHTLY TO THE N. THE TWO WILL SQUEEZE AND AMPLIFY THE WEAK SFC TROF OVER THE E COAST. AXIS OF THE TROUGH WILL EXTEND ACROSS FL PANHANDLE AND NRN PENINSULA...COULD BE A GOOD FOCUS FOR RW/TRW DEVELOPMENT. OTHER SIDE OF THIS COIN...HOWEVER...IS THAT THE WRLY LOW LEVEL FLOW WILL LIKELY INCREASE OVER PEN AND SUPPRESS ECSB. FCST WILL INDICATE SLOWLY INCREASING POPS...BUT TOO SOON TO GO GUNG-HO ATTM. TUE...UPPER HIGH HAS RETROGRADED WWD AND ALLOWED WEAK UPPER TROFFING ALONG E COAST. SFC WAVE DEVELOPMENT INDICATED BY MODELS BY TUE MORN OFF E COAST. A LITTLE COOLING OCCURS ALOFT...BUT STILL FAIRLY WARM. INCREASE IN PWATS OCCURING AND SHOULD HAVE SCT AFTN ACTIVITY DEVELOP ALONG SEA BREEZE BOUNDARIES AND WILL INCREASE POPS SLIGHTLY OVER MON. INCREASING MOISTURE AND DECREASING HEIGHTS SHOULD HELP MAX TEMPS FROM CLIMBING QUITE AS HIGH. WED...SFC BOUNDARY WILL PERSIST OVER NC PART OF STATE BUT AM THINKING AVN IS TOO AGRESSIVE WITH DEPICTION OF SFC LOW AND VORT MAX OVER NRN PART OF STATE ON WED MORN. COVERAGE OF POPS SHOULD BE A LITTLE HIGHER WITH BETTER MOISTURE...BOUNDARY TO N AND RIDGE AXIS TO S WITH GENERAL STORM MOTION TOWARD E COAST. THU AND FRI...LOW LEVEL RIDGE AXIS WILL CONTINUE S OF AREA AND WEAK SFC TROF STILL INDICATED TO N. SHOULD CONTINUE TO SEE SCT COVERAGE AFTN TSTMS AND MAXES IN LOW/MID 90S. MARINE...GENERALLY A WLY WIND COMPONENT THROUGH PERIOD AS SFC BOUNDARY DRIFTS INTO NRN PART OF STATE AND WILL NEED TO WATCH HOW SFC LOW DEVELOPMENT PLAYS OUT. GRADUAL INCREASE IN STORM COVERAGE INTO MID WEEK. PRELIMINARY NUMBERS DAB GB 078/096 076/093 075 52132 MCO GB 077/097 076/094 074 52132 MLB BB 078/095 077/093 075 52131 .MLB...FIRE WEATHER WATCH 2 PM TO SUNSET FOR ALL OF ZONES 11 16...AND INTERIOR ZONES 12 17. BRAGAW/GLITTO
In the hours before
Special weather statement, Aug 1, 11:59 AM EDT, 5 hours 17 minutes before
AMZ550-555-570-575-FLZ041-044>047-053-054-058-059-064-011900- EAST CENTRAL FLORIDA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MELBOURNE FL 1159 AM EDT SUN AUG 1 1999 ...HEAT INDEX FROM 105 TO 110 DEGREES THIS AFTERNOON... ...ISOLATED LIGHTNING STORMS EXPECTED... WEST WINDS WILL CONTINUE TO PRODUCE ABOVE NORMAL TEMPERATURES ACROSS EAST CENTRAL FLORIDA THIS AFTERNOON. OVER THE INTERIOR COUNTIES... TEMPERATURES IN THE MID TO UPPER 90S WILL COMBINE WITH HUMID AIR TO MAKE IT FEEL LIKE 105 TO 110 DEGREES IN THE SHADE THIS AFTERNOON. THE EAST COAST SEA BREEZE IS EXPECTED TO DEVELOP THIS AFTERNOON SOUTH OF CAPE CANAVERAL AND MOVE INLAND TO THE EAST PORTIONS OF THE INTERIOR COUNTIES. PRIOR TO THE FORMATION OF THE SEA BREEZE... HOWEVER...HEAT INDICES OVER THE COASTAL COUNTIES WILL ALSO REACH 105 TO 110 DEGREES. NORTH OF THE CAPE...THE WEST WINDS ARE STRONGER AND MAY SUPPRESS THE SEA BREEZE COMPLETELY. HEAT INDICES MAY EXCEED 110 DEGREES IN A FEW SPOTS. PEOPLE ARE ENCOURAGED TO LIMIT THEIR EXPOSURE TO THE SUN...AVOID OVER EXERTION...AND DRINK PLENTY OF WATER WHILE OUTDOORS TODAY. DAYTIME TEMPERATURES IN ENCLOSED VEHICLES CAN EXCEED A SWELTERING 150 DEGREES...DEADLY TO CHILDREN AND PETS. WARM AIR ALOFT WILL LIMIT THE FORMATION AND COVERAGE OF LIGHTNING STORMS AGAIN TODAY. NONETHELESS...STRONG SOLAR HEATING AND THE PRESENCE OF THE EAST COAST SEA BREEZE BOUNDARY WILL SPARK A FEW LIGHTNING STORMS ACROSS THE COASTAL REGIONS. ANY STORMS THAT DEVELOP MAY CONTAIN DEADLY CLOUD TO GROUND LIGHTNING...GUSTY WINDS...AND LOCALLY HEAVY RAINFALL. AS THEY FORM...THE STORMS WILL MOVE SOUTHWEST AT 5 TO 10 MPH. KEEP AN EYE TO THE SKY AND SEEK SHELTER IF THREATENING WEATHER APPROACHES. SKYWARN STORM SPOTTER ACTIVATION IS NOT EXPECTED ACROSS EAST CENTRAL FLORIDA TODAY. BRAGAW
Special weather statement, Aug 1, 11:59 AM EDT, 5 hours 17 minutes before
AMZ550-555-570-575-FLZ041-044>047-053-054-058-059-064-011900- EAST CENTRAL FLORIDA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MELBOURNE FL 1159 AM EDT SUN AUG 1 1999 ...HEAT INDEX FROM 105 TO 110 DEGREES THIS AFTERNOON... ...ISOLATED LIGHTNING STORMS EXPECTED... WEST WINDS WILL CONTINUE TO PRODUCE ABOVE NORMAL TEMPERATURES ACROSS EAST CENTRAL FLORIDA THIS AFTERNOON. OVER THE INTERIOR COUNTIES... TEMPERATURES IN THE MID TO UPPER 90S WILL COMBINE WITH HUMID AIR TO MAKE IT FEEL LIKE 105 TO 110 DEGREES IN THE SHADE THIS AFTERNOON. THE EAST COAST SEA BREEZE IS EXPECTED TO DEVELOP THIS AFTERNOON SOUTH OF CAPE CANAVERAL AND MOVE INLAND TO THE EAST PORTIONS OF THE INTERIOR COUNTIES. PRIOR TO THE FORMATION OF THE SEA BREEZE... HOWEVER...HEAT INDICES OVER THE COASTAL COUNTIES WILL ALSO REACH 105 TO 110 DEGREES. NORTH OF THE CAPE...THE WEST WINDS ARE STRONGER AND MAY SUPPRESS THE SEA BREEZE COMPLETELY. HEAT INDICES MAY EXCEED 110 DEGREES IN A FEW SPOTS. PEOPLE ARE ENCOURAGED TO LIMIT THEIR EXPOSURE TO THE SUN...AVOID OVER EXERTION...AND DRINK PLENTY OF WATER WHILE OUTDOORS TODAY. DAYTIME TEMPERATURES IN ENCLOSED VEHICLES CAN EXCEED A SWELTERING 150 DEGREES...DEADLY TO CHILDREN AND PETS. WARM AIR ALOFT WILL LIMIT THE FORMATION AND COVERAGE OF LIGHTNING STORMS AGAIN TODAY. NONETHELESS...STRONG SOLAR HEATING AND THE PRESENCE OF THE EAST COAST SEA BREEZE BOUNDARY WILL SPARK A FEW LIGHTNING STORMS ACROSS THE COASTAL REGIONS. ANY STORMS THAT DEVELOP MAY CONTAIN DEADLY CLOUD TO GROUND LIGHTNING...GUSTY WINDS...AND LOCALLY HEAVY RAINFALL. AS THEY FORM...THE STORMS WILL MOVE SOUTHWEST AT 5 TO 10 MPH. KEEP AN EYE TO THE SKY AND SEEK SHELTER IF THREATENING WEATHER APPROACHES. SKYWARN STORM SPOTTER ACTIVATION IS NOT EXPECTED ACROSS EAST CENTRAL FLORIDA TODAY. BRAGAW
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 4:25 PM EDT | Severe Thunderstorm Warning | MLB | Lake | 45 min |
| Aug 1, 6:03 PM EDT | Severe Thunderstorm Warning | MLB | Osceola | 32 min |
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.