Alert archive / Florida / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 6, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Jan 3, 1999, 2:29 AM EST for Indian River County, Saint Lucie County, Florida. It was in force for 31 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
- Jan 3, 1999, 2:29 AM EST (07:29 UTC)
- Expired
- Jan 3, 1999, 3:00 AM EST
- In force
- 31 min
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
The radar
The Melbourne radar (KMLB), 65 km from the middle of the area, began a volume at 07:30 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
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 3, 2:34 AM EST | Thunderstorm Wind 50 | Vero Beach Muni Arpt, FL | Thunderstorm winds damaged doors to the terminal building at the Vero Beach Airport. |
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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 2, 9:00 PM EST | Tornado Watch | SPC | 6 hr |
| Jan 3, 12:45 AM EST | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Cape Canaveral, FL (KXMR), launched 00:00Z, 7.5 hours before the alert went out and 104 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1021 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 86 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
999
WUUS01 KMLB 030730 RRA
SVRMLB
FLC061-111-030800-
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE MELBOURNE FL
229 AM EST SUN JAN 3 1999
THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
EASTERN INDIAN RIVER COUNTY IN EAST CENTRAL FLORIDA
EASTERN ST. LUCIE COUNTY IN EAST CENTRAL FLORIDA
* UNTIL 300 AM EST
* AT 225 AM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM FROM JUST EAST OF OSLO TO SOUTHWEST OF INDRIO.
MOVEMENT WAS EAST AT 35 MPH.
* THE SEVERE THUNDERSTORM WILL CROSS THE COAST FROM VERO BEACH TO
FORT PIERCE AND WHITE CITY THROUGH 250 AM.
A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. SEVERE
THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE
OR NO ADVANCE WARNING. GO TO A SAFE PLACE IF SEVERE THUNDERSTORMS
APPROACH YOUR AREA, ESPECIALLY IF YOU LIVE IN A MOBILE HOME.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 Jan 2, 8:40 PM EST, 5 hours 49 minutes earlier.
Area forecast discussion, Jan 2, 8:40 PM EST, 5 hours 49 minutes before
EAST CENTRAL FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MELBOURNE FL 840 PM EST SAT JAN 2 1999 CURRENTLY...KMLB 88D FAIRLY QUIET ATTM...HOWEVER AIR MASS SHOWS INCREASINGLY FAVORABLE SHEAR PROFILE DEVELOPING OVER NORTH/CENTRAL FLORIDA THROUGH ABOUT 06Z. SFC-850MB WINDS PROGGED TO MAX OUT NEAR 45-50KT ACROSS NORTHERN HALF OF CWA...WHILE MODIFIED WINDS ON THE 00Z TBW RAOB YIELDS BEST STORM-REL HELICITIES NEAR 300M2/S2. CURRENT ACTIVITY OVER GULF STREAM INDICATES THAT ENOUGH INSTABILITY WILL LIKELY REMAINS OVER THE PENINSULA TO SUSTAIN STORMS ALONG PRE-FRONTAL SQUALL LINE THROUGH EARLY PART OF OVERNIGHT PERIOD...AS SOUTHERN STREAM SHORT WAVE CLEARLY EVIDENT ON WATERVAPOR IMAGERY OVER CENTRAL GOMEX...PUSHES ENE ACROSS NORTH FLORIDA NEXT 6 HOURS. NEW WW (TOR) WILL COVER NORTHERN 2/3 OF WARNING AREA PER SPC/MIA COORD. WATCH RELATED UPDATES TO SHORT TERM/ZONE FORECASTS AND HAZARDOUS WX OUTLOOK WILL FOLLOW. CRISTALDI
In the hours before
Special weather statement, Jan 2, 9:50 PM EST, 4 hours 39 minutes before
AMZ550-555-570-575-FLZ041-044>047-053-054-058-059-064-030800- EAST CENTRAL FLORIDA HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MELBOURNE FL 950 PM EST SAT JAN 2 1999 ...A TORNADO WATCH IS IN EFFECT FOR MUCH OF EAST CENTRAL FLORIDA UNTIL 3AM EST SUNDAY MORNING... A LINE OF STRONG TO SEVERE THUNDERSTORMS WILL MOVE EASTWARD ACROSS THE CENTRAL FLORIDA PENINSULA LATE TONIGHT AND INTO THE EARLY MORNING HOURS OF SUNDAY. THE ATMOSPHERE OVER CENTRAL FLORIDA IS FAVORABLE FOR THE FORMATION OF SEVERE THUNDERSTORMS. IN ADDITION TO THE THREAT OF DAMAGING WINDS IN EXCESS OF 58 MPH AND LARGE HAIL... SOME OF THE THUNDERSTORMS MAY PRODUCE TORNADOES. THE APPROACHING SYSTEM HAS ALREADY PRODUCED SEVERAL TORNADOES...WITH CONFIRMED DAMAGE...OVER THE PANHANDLE EARLIER TODAY. THE STORMS WILL BEGIN TO AFFECT LAKE COUNTY BY 11 PM AND SPREAD EASTWARD INTO VOLUSIA...ORANGE...SEMINOLE...AND OSCEOLA COUNTIES AROUND MIDNIGHT...AND THEN AFTERWARDS MOVE INTO BREVARD... INDIAN RIVER...AND OKEECHOBEE COUNTIES. ALTHOUGH ST LUCIE AND MARTIN COUNTIES ARE NOT IN THE WATCH AREA...THEY ARE LOCATED VERY CLOSE TO IT AND WILL BE AFFECTED BY THE PASSING SQUALL LINE OVER NIGHT. THESE COUNTIES SHOULD PREPARE FOR ISOLATED SEVERE WEATHER. RESIDENTS AND VISITORS ALIKE SHOULD LISTEN FOR ADDITIONAL STATEMENTS AND POSSIBLE WARNINGS LATE TONIGHT AND INTO EARLY SUNDAY MORNING. DO NOT GO TO BED UNINFORMED. PREPARE A PERSONAL ACTION PLAN...NOW... IN CASE A WARNING IS ISSUED FOR YOUR AREA. IF YOU OWN A WEATHER RADIO...MAKE SURE THE TONE ALERT FEATURE IS TURNED ON. THIS IS ONE WAY OF MAKING SURE THAT YOU WILL RECEIVE A WARNING AFTER RETIRING FOR THE NIGHT. IF YOU ARE IN A MOBILE HOME OR RV PARK...DETERMINE WHERE THE CLOSEST SAFE SHELTER IS LOCATED AND HOW YOU WILL RECEIVE A WARNING IF ONE IS ISSUED FOR YOUR LOCATION. IF NECESSARY...DESIGNATE A PARK WATCHMAN. IF YOU ARE A VISITOR...BE SURE THAT YOU KNOW WHICH CENTRAL FLORIDA COUNTY YOU ARE IN. WEATHER SPOTTERS ARE URGED TO RELAY ANY AND ALL SEVERE WEATHER REPORTS VIA PHONE OR HAM RADIO ACCORDINGLY. THE SQUALL LINE OF THUNDERSTORMS WILL BE APPROACHING FROM THE WEST WITH INDIVIDUAL STORMS MOVING QUICKLY TO THE NORTH AND NORTHEAST AROUND 35 MPH. SHARP
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 2, 11:28 PM EST | Severe Thunderstorm Warning | MLB | Lake | 62 min |
| Jan 3, 12:10 AM EST | Tornado Warning | MLB | Orange, Seminole | 30 min |
| Jan 3, 12:29 AM EST | Severe Thunderstorm Warning | MLB | Volusia | 61 min |
| Jan 3, 12:33 AM EST | Severe Thunderstorm Warning | MLB | Orange, Osceola, Seminole | 62 min |
| Jan 3, 1:03 AM EST | Tornado Warning | MLB | Osceola | 32 min |
| Jan 3, 1:10 AM EST | Severe Thunderstorm Warning | MLB | Brevard | 60 min |
| Jan 3, 1:31 AM EST | Tornado Warning | MLB | Brevard | 49 min |
| Jan 3, 1:36 AM EST | Severe Thunderstorm Warning | MLB | Okeechobee | 64 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; radar from the NEXRAD Level II archive.