Alert archive / Florida / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 51, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Jul 20, 2000, 7:34 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
- Jul 20, 2000, 7:34 PM EDT (23:34 UTC)
- Expired
- Jul 20, 2000, 8:30 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 23:35 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, 11.6 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
- 3636 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 608 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- 3 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS52 KMLB 202336 SVRMLB FLC097-210030- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MELBOURNE FL 734 PM EDT THU JUL 20 2000 THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... OSCEOLA COUNTY ...IN EAST CENTRAL FLORIDA * UNTIL 830 PM EDT * AT 732 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM NEAR LAKE TOHO...MOVING NORTHEAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... NEAR SAINT CLOUD AT 745 PM EDT NEAR NARCOOSSEE AT 810 PM EDT SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 58 MILES AN HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN. IF THE STORM APPROACHES YOU...MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR. LARGE HAIL...EXCESSIVE LIGHTNING AND DAMAGING WINDS ARE LIKELY. TAKE COVER IN A STURDY BUILDING UNTIL THE STORM PASSES. REPORT LARGE HAIL...DIME SIZE OR LARGER...OR SIGNIFICANT WIND DAMAGE TO LOCAL LAW ENFORCEMENT FOR IMMEDIATE RELAY TO THE NATIONAL WEATHER SERVICE. $$ LAT...LON 2833 8162 2778 8114 2792 8088 2835 8089 28
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 Jul 20, 2:10 PM EDT, 5 hours 24 minutes earlier.
Area forecast discussion, Jul 20, 2:10 PM EDT, 5 hours 24 minutes before
EAST CENTRAL FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MELBOURNE FL 210 PM EDT THU JUL 20 2000 CURRENTLY/TONIGHT...CLOUDS LOOK LESS DEVELOPED THAN 24 HOURS AGO...LIKELY FEELING THE EFFECTS OF THE WEAK SUBSIDENCE/DRYING THAT WAS STILL EVIDENT ON THE WATER VAPOR IMAGERY. EXPECT THAT STORMS FIRING WEST OF LAKE OKEECHOBEE AND THE ATTENDANT OUTFLOWS WILL PROPAGATE ACTIVITY TO THE NORTHEAST THROUGH THE AFTERNOON AND EVENING. NO SEA BREEZE HAS DEVELOPED AND IT LOOKS DOUBTFUL THAT ONE WILL FORM SO WILL JUST GO WITH SLIGHT CHANCE POPS FOR NOW...AND ADJUST AS NEEDED BEFORE ZONE ISSUANCE. FRIDAY/SATURDAY...WEAKENING FRONTAL TROUGH WILL BE STALLING NORTH OF THE AREA AS SHORTWAVE LIFTS OUT AND NEXT ONE DROPS INTO BASE OF EAST COAST TROUGH. SURFACE RIDGE STAYS SUPPRESSED TO THE SOUTH WITH A CONTINUATION OF THE SOUTHWEST FLOW. H25 RIDGE AXIS IS PROGGED TO WEAKEN AND SHIFT SLIGHTLY SOUTH. THIS SHOULD ALLOW SUBSIDENCE TO DIMINISH. DEEP MOISTURE IS PROGGED BY ALL THE MODELS TO BE AT OR A LITTLE ABOVE NORMAL (1.7 INCHES) WITH LITTLE CHANGE IN MID LEVEL LAPSE RATES. GRADIENT FLOW MAY BE ENOUGH TO HOLD OFF A SEA BREEZE ONCE AGAIN...EVEN THOUGH FWCS INSIST ONE WILL DEVELOP. IT WILL CONTINUE HOT WITH MID 90S IN MOST PLACES. WILL NOT GO ABOVE THE 40 PERCENT FWC/FAN POPS DUE TO SEA BREEZE UNCERTAINTY. SUNDAY THROUGH TUESDAY...SUCCESSION OF WEAK SHORTWAVES DROPPING THROUGH MEAN EAST COAST TROUGH WILL KEEP A SURFACE FRONTAL TROUGH QUASI STATIONARY JUST NORTH OF THE AREA AND SURFACE RIDGE AXIS SUPPRESSED NEAR OR SOUTH OF LAKE OKEECHOBEE. RESULTANT SOUTHWEST FLOW PATTERN FAVORS WARM TEMPS WITH SCATTERED AFTERNOON STORMS. MRF IS SHOWING THAT THE H25 RIDGE WILL WEAKEN/SHIFT SOUTH AS FLOW PATTERN AMPLIFIES OVER THE EASTERN PART OF THE COUNTRY. THIS MAY LEAD TO A LITTLE BIT OF AN INCREASE IN ACTIVITY. MARINE...GRADIENT CONTINUES SLIGHTLY GREATER OVER NORTHERN SECTIONS DUE TO WEAK SURFACE LOW VICINITY OF SOUTH CAROLINA. MODEL BOUNDARY LAYER WIND PROGS SHOW QUITE A LOT OF 15 KNOT BARBS. WILL CONTINUE TO SHOW SOME NORTH/SOUTH CONTRAST BUT OVERALL NO PROBLEMS NEAR SHORE DUE TO THE WARM SOUTHWEST FLOW AND MAYBE 4 FEET OVER THE OUTER LEGS. PRELIMINARY NUMBERS... DAB BB 076/096 076/095 075 2324 MCO BB 077/096 076/095 075 2424 MLB BB 077/095 076/094 075 2424 .MLB...NONE. PUBLIC/MARINE...LASCODY AVIATION/FIRE WX...PENDERGRAST
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 5:41 PM EDT | Severe Thunderstorm Warning | MLB | Lake | 49 min |
| Jul 20, 6:28 PM EDT | Severe Thunderstorm Warning | MLB | Lake | 32 min |
| Jul 20, 6:39 PM EDT | Severe Thunderstorm Warning | MLB | Volusia | 51 min |
| Jul 20, 7:08 PM EDT | Severe Thunderstorm Warning | MLB | Lake | 67 min |
| Jul 20, 7:30 PM EDT | Tornado Warning | MLB | Lake | 30 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2000Every severe thunderstorm warning in 2000
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.