Alert archive / Florida / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 113, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Aug 1, 1999, 6:03 PM EDT for Osceola County, Florida. It was in force for 32 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
- Aug 1, 1999, 6:03 PM EDT (22:03 UTC)
- Expired
- Aug 1, 1999, 6:35 PM EDT
- In force
- 32 min
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
County Osceola County, FL
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| 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, 10.1 hours before the alert went out and 129 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 012203 RRA
SVRMLB
FLC097-012235-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
603 PM EDT SUN AUG 1 1999
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
WESTERN OSCEOLA COUNTY IN EAST CENTRAL FLORIDA
* UNTIL 635 PM EDT
* AT 604 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM KISSIMMEE. MOVEMENT WAS WEST AT 5 MPH.
* THE SEVERE THUNDERSTORM WILL BE NEAR...
WILL MOVE THROUGH KISSIMMEE BY 630 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.
$$
WIMMERWhat 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, 2 hours 33 minutes earlier.
Area forecast discussion, Aug 1, 3:30 PM EDT, 2 hours 33 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
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, 5:16 PM EDT | Severe Thunderstorm Warning | MLB | Orange, Osceola | 49 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.