Alert archive / Florida / Tornado Warnings in 1999
Tornado Warning 10, NWS Melbourne, FL
NWS Melbourne, FL issued this tornado warning at May 28, 1999, 7:14 PM EDT for Osceola County, Florida. It was in force for 56 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
- May 28, 1999, 7:14 PM EDT (23:14 UTC)
- Expired
- May 28, 1999, 8:10 PM EDT
- In force
- 56 min
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
County Osceola County, FL
The radar
The Melbourne radar (KMLB), 49 km from the middle of the area, began a volume at 23:16 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, 11.2 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
- 45 J/kg
- Mixed-layer CIN
- -88 J/kg
- Mixed-layer LCL
- 911 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 19 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
999
WFUS01 KMLB 282317 RRA
TORMLB
FLC097-290010-
BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
714 PM EDT FRI MAY 28 1999
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
* TORNADO WARNING FOR...
OSCEOLA COUNTY IN EAST CENTRAL FLORIDA
* UNTIL 810 PM EDT
* AT 710 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO APPROACHING THE
INTERSECTION OF INTERSTATE 4 AND U.S. 192. MOVEMENT WAS SOUTH TO
SOUTHEAST AT 15 MPH.
* THE TORNADO WILL BE NEAR...
INTERCESSION CITY...CAMPBELL CITY AND KISSIMMEE BY 720 PM
POINCIANA BY 730 PM
THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL AND WIND DAMAGE
ACROSS LAKE AND SUMTER COUNTIES...WITH AN UNCONIRMED TORNADO
TOUCHDOWN SOUTHEAST OF CLERMONT ON HIGHWAY 27.
ANOTHER SEVERE THUNDERSTORM WAS NEAR THE NOVA ROAD AREA OF NORTHEAST
OSCEOLA COUNTY.
IF YOU ARE IN THE PATH OF A TORNADO...ABANDON CARS AND MOBILE
HOMES FOR A REINFORCED BUILDING OR GET INTO A DITCH OR CULVERT.
THE SAFEST PLACE IS AN INTERIOR ROOM SUCH AS A CLOSET ON THE LOWEST
FLOOR OF A STRONG BUILDING. AVOID WINDOWS.
CRISTALDI
&What forecasters said that day
The local office's own words before this tornado 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 tornado warning went out at May 28, 2:30 PM EDT, 4 hours 44 minutes earlier.
Area forecast discussion, May 28, 2:30 PM EDT, 4 hours 44 minutes before
EAST CENTRAL FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MELBOURNE FL 230 PM EDT FRI MAY 28 1999 AS OF MID AFTERNOON...LOW LEVEL CONVERGENCE ASSOCIATED WITH EAST COAST SEA BREEZE LEADING TO WIDELY SCATTERED SHOWERS AND A FEW LIGHTNING STORMS OVER THE COASTAL COUNTIES. MINIMUM OF CU FORMATION ON SATELLITE LOOPS OVER SOUTHERN/WESTERN PORTION OF THE STATE INDICATE LESSER EXTENT OF MOISTURE. SURFACE OBSERVATIONS CONFIRM THIS AS DEWPOINTS HAVE FALLEN INTO LOWER/MID 60S...DUE TO VERTICAL MIXING OF DRY AIRMASS. HOWEVER...SOME ADDITIONAL STORM FORMATION LIKELY AS THE WEST COAST BOUNDARY INTERACTS WITH LAKE BREEZES AND OTHER OUTFLOWS OVER THE CENTRAL FL INTERIOR. WESTERLY FLOW ALOFT WILL ADVECT THE BRUNT OF ACTIVITY TOWARDS THE EAST SIDE OF BY EARLY EVENING. EXPECT SOME LINGERING CONVECTION EARLY TONIGHT ALONG THE EAST COAST. SKIES WILL BECOME PARTLY/MOSTLY CLEAR OVERNIGHT WITH MINS NEAR CLIMO. SATURDAY AND SUNDAY...BROAD MID/UPPER TROUGH SHOWS AMPLIFICATION ALONG THE EAST COAST. ASSOCIATED DEEP LAYER DRYING FORECAST TO MOVE SOUTHWEST OVER THE ATLANTIC BUT REMAIN EAST OF THE AREA. SURFACE HIGH SHOWN BY ALL MODELS TO STRENGTHEN WITH DEPTH OF ONSHORE FLOW INCREASING. WOULD THEREFORE EXPECT COVERAGE OF SHOWERS AND STORMS TO CONTINUE TO BE AT LEAST SCATTERED. ACTIVITY SHOULD START TO FAVOR THE EARLY PART OF THE DAY ALONG THE EAST COAST BY SUNDAY AS ONSHORE FLOW DEEPENS TO AROUND 700 MB. MEMORIAL DAY THROUGH WEDNESDAY...MID/UPPER RIDGE PUSHING EAST INTO THE ATLANTIC SHOULD ALLOW WEAK UPSTREAM TROUGH TO PUSH TOWARDS EASTERN SEABOARD. 00Z MRF WAS SUGGESTING SOME DEEP LAYER DRYING MOVING IN FROM THE EAST ON MEMORIAL DAY...BUT 12Z AVN BRINGS MOISTURE ASSOCIATED WITH TROUGH ACROSS THE PENINSULA...SO IT LOOKS LIKE CONTINUATION OF MOIST EASTERLY FLOW REGIME. MARINE...BUOYS STILL SHOWING ONLY 10 KT AND LATEST RUC CONTINUES THIS INTO THE EVENING. OTHER MODELS SHOWS SOME 15 KT WINDS LATER TONIGHT BUT THE ACTUAL PRESSURE GRADIENT STILL LOOKS LIKE IT SUPPORTS AROUND 10 KT. ALL INDICATE THAT GRADIENT WILL INCREASE SATURDAY AND WILL SHOW TREND TO 10 TO 15 KT IN SECOND PERIOD. PRELIMINARY DAB BB 070/083 071/083 072 2423 MCO BB 070/086 071/086 071 2423 MLB BB 072/085 073/084 074 2323 .MLB...NONE. SPRATT/LASCODY
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 28, 4:06 PM EDT | Tornado Warning | MLB | Indian River | 49 min |
| May 28, 4:29 PM EDT | Severe Thunderstorm Warning | MLB | Seminole | 46 min |
| May 28, 5:47 PM EDT | Severe Thunderstorm Warning | MLB | Lake | 58 min |
| May 28, 6:42 PM EDT | Tornado Warning | MLB | Lake | 33 min |
| May 28, 6:47 PM EDT | Tornado Warning | MLB | Orange | 48 min |
Nearby
Tornado Warnings in Florida, 1999Every tornado warning in 1999Tornadoes 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.