Alert archive / Florida / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 6, NWS Melbourne, FL
NWS Melbourne, FL issued this severe thunderstorm warning at Apr 4, 2002, 5:35 PM EST for Orange County, Seminole County, Florida. It was in force for 40 min. 2 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
- Apr 4, 2002, 5:35 PM EST (22:35 UTC)
- Expired
- Apr 4, 2002, 6:15 PM EST
- In force
- 40 min
- Issued by
- NWS Melbourne, FL
- Area
- Whole counties
Counties Orange County, FL, Seminole County, FL
The radar
The Melbourne radar (KMLB), 83 km from the middle of the area, began a volume at 22:35 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Apr 4, 5:57 PM EST | Hail 0.75 | Longwood, FL | |
| Apr 4, 6:14 PM EST | Hail 0.75 | Winter Spgs, FL |
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
Cape Canaveral, FL (KXMR), launched 12:00Z, 10.6 hours before the alert went out and 78 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
- 113 J/kg
- Mixed-layer CIN
- -178 J/kg
- Mixed-layer LCL
- 909 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- 14 m²/s²
- 0-3 km storm-relative helicity
- 29 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 042235 SVRMLB FLC095-117-042315- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE MELBOURNE FL 534 PM EST THU APR 4 2002 THE NATIONAL WEATHER SERVICE IN MELBOURNE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EASTERN ORANGE COUNTY SOUTH SEMINOLE COUNTY IN EAST CENTRAL FLORIDA * UNTIL 615 PM EST. * AT 533 PM EST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER WEKIWA SPRINGS STATE PARK...OR ABOUT 4 MILES SOUTHEAST OF MOUNT PLYMOUTH...MOVING SOUTHEAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE... NEAR WEKIVA SPRINGS...FOREST CITY AT 540 PM EST NEAR LONGWOOD...ALTAMONTE SPRINGS AT 545 PM EST NEAR FERN PARK...MAITLAND AT 550 PM EST NEAR CASSELBERRY AT 555 PM EST 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. VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE STORM. IF YOU ARE IN ITS PATH...PUT YOUR CAR IN A GARAGE AND MOVE TO A STURDY BUILDING AWAY FROM WINDOWS. $$ LAT...LON 2885 8149 2869 8159 2841 8111 2862 8097 JP
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 Apr 4, 2:30 PM EST, 3 hours 5 minutes earlier.
Area forecast discussion, Apr 4, 2:30 PM EST, 3 hours 5 minutes before
EAST CENTRAL FLORIDA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MELBOURNE FL 230 PM EST THU APR 4 2002 TODAY/TONIGHT...1032 MB HIGH PRESSURE CENTER BUILDS SOUTH FROM MIDWEST WITH PGRAD INCREASING OVER PENINSULA BETWEEN THIS HIGH AND ATLANTIC LOW...WITH WEAK TRAILING FRONT/WIND SHIFT REACHING ACROSS SOCEN PENINSULA WITH DEW POINT BOUNDARY BACK ACROSS NRN PENINSULA. FRONT WILL CONTINUE TO DIMINISH AS IT DRIFTS SOUTH TODAY. NORTHWEST WINDS EARLY IN THE DAY WILL BECOME N TO NE AS SURGE HIGHER WITH HIGH BUILDING IN...WILL LEAVE BREEZY MENTION FOR ALL LOCATIONS. AS DRIER AND MORE STABLE ARE FILTERS IN...PRECIP IS NOT EXPECTED TODAY WITH THE ONLY POSSIBLE EXCEPTION OF THE FAR SOUTH CWA...BUT PROSPECTS TOO LOW TO WARRANT A ZONE MENTION. SKIES SHOULD AVERAGE PARTLY CLOUDY BUT WILL HAVE TO KEEP AN EYE ON EXTENT OF MARINE STRATOCU BY LATER TODAY WITH FLOW VEERING TO MORE NELY COMPONENT. SEVERAL DEGREES COOLER TODAY THAN ON THURS FOR ALL AREAS THEN ONSHORE COMPONENT NEAR THE COAST TONIGHT SHOULD HOLD MINS UP SEVERAL DEGREES WARMER THAN THE INTERIOR. MESOETA STILL INDICATING ENOUGH LOW LEVEL MOISTURE AND ONSHORE FLOW OVERNIGHT INTO SAT TO KEEP A LOW POP MENTION IN FOR SOUTHERN COASTAL SECTIONS. SAT-MON...SURFACE HIGH CENTER DRIFTS EAST AND MOVES OFF THE MID ATLANTIC COAST SUNDAY. HEIGHTS RISE AS H5 RIDGE CRESTS OVER THE PENINSULA SUNDAY INTO MON. WINDS WILL VEER FROM NE TO ELY SAT INTO SUNDAY AND SELY MON. PGRAD REMAINS TIGHT ENOUGH THAT WINDY OR BREEZY MENTION WILL BE CONTINUED FOR ALL ZONES OVER THE WEEKEND. MAY STILL BE BREEZY NEAR THE COAST MONDAY BUT PGRAD WILL BEGIN TO SLACKEN A BIT BY THEN. A FEW COASTAL SHOWERS WILL MOVE ONSHORE FLOW DURING THE OVERNIGHT AND MORNING HOURS. ONSHORE FLOW WILL KEEP TEMPS MODERATED BUT GETTING A LITTLE WARMER EACH DAY. TUE-THU...CONTINUATION OF WEAKENING PGRAD AND SE-S FLOW DURING THE MID WEEK. PWAT VALUES CREEPING BACK UP AND MAY HAVE A FEW AFTERNOON SHOWERS/STORMS MID WEEK OVER THE INTERIOR SECTIONS. MARINE...NW WINDS 10-15KT AND SEAS 2-3 FT AT BUOY 41009 EARLY THIS MORNING. NWW3 00Z OUTPUT NOT RAISING SEAS TO 7FT AT THIS LOCATION UNTIL SATURDAY BUT AS WINDS PICK UP TODAY SEAS IN THE GULF STREAM SHOULD REACH THIS THRESHOLD. PLAN TO RAISE SCA FOR THE GULF STREAM WATERS WITH MORNING PACKAGE ISSUANCE AND MAY BE NEEDED FOR ALL OF THE EC FL WATERS BY TONIGHT OR EARLY SATURDAY. WINDS AND SEAS WILL REMAIN HIGH ENOUGH TO CONTINUE ADVISORIES OVER THE WEEKEND AND MAY LINGER INTO MONDAY. PRELIMINARY CCF... DAB BB 074/058 073/060 075 0112 MCO BB 079/056 077/055 079 000- MLB BB 077/062 075/063 077 1222 .MLB...SCA GULF STREAM WATERS FLAGLER BEACH TO JUPITER INLET. PUBLIC/MARINE...GLITTO AVIATION/FIRE WX...GITTINGER
The office that day
Everything else NWS Melbourne, FL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 4, 6:19 PM EST | Severe Thunderstorm Warning | MLB | Orange, Seminole | 56 min |
Nearby
Severe Thunderstorm Warnings in Florida, 2002Every severe thunderstorm warning in 2002
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.