Westerly flow assisted the west coast seabreeze in pushing through east-central Florida during the afternoon hours. Storms sparked along the seabreeze boundary and intensified as they interacted with the east coast seabreeze, which was pinned along the east coast.
Every event with a place to put it. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS MLB wrote it up.
Westerly flow assisted the west coast seabreeze in pushing through east-central Florida during the afternoon hours. Storms sparked along the seabreeze boundary and intensified as they interacted with the east coast seabreeze, which was pinned along the east coast. As they intensified, the storms produced severe wind gusts and a funnel cloud in Brevard County.
The local office's own words before the first event, 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 the first event at Jun 20, 9:05 AM EST, 3 hours 20 minutes earlier.
AREA FORECAST DISCUSSION...CORRECTED NATIONAL WEATHER SERVICE MELBOURNE FL 1005 AM EDT THU JUN 20 2013 .DISCUSSION... ...SCATTERED SLOW MOVING STORMS WITH LOCALLY HEAVY RAIN TODAY... CURRENT...WEAK MEANDERING SURFACE TROUGH LIES JUST NORTH OF FLORIDA. TO THE SOUTH....THE ATLC RIDGE AXIS LIES ALONG A LINE FROM JUPITER INLET TO OKEECHOBEE WNW TO THE SARASOTA-RUSKIN AREA. SURFACE WINDS OVER THE SRN THIRD CWA ARE SRLY...VEERING TO SSW AND SW OVER THE CTRL AND NRN COS. MORNING RAOBS SHOW 1.7" OF MEAN PWAT...SFC-H85 LYR OVER EASTERN SIDE OF THE PENINSULA IS A TAD DRIER THAN THE WEST SIDE WHILE WRN FLORIDA IS DRIER ABOVE H70. BOTH THE CIRA COMBINED TPW (COURTESY OF UAH-NASA/SPORT) AND GPS IPW PRODUCTS INDICATE A SMALL POCKET OF LOWER PWAT AIR (1.25 TO 1.5") NORTH OF I-4. H50 TEMPS ARE ABOUT -8C...AT THE COOL END OF THE NORMAL RANGE FOR MID-LATE JUNE. SKIES ARE SUNNY-MOSUNNY WITH DIURNAL CU FIELD JUST STARTING TO SHOW UP ON VIS IMAGERY. REMAINDER OF TODAY...EXPECT EVOLUTION OF DIURNAL CONVECTION TO BE LARGELY SIMILAR TO WED...ALBEIT PERHAPS SHIFTED INLAND EVER SO SLIGHTLY OVER THE CTRL AND SRN CWA AS FLOW IS A BIT MORE BACKED THERE TODAY. BETTER CHANCE FOR A FEW STRONGER STORMS LATER TODAY ALONG BOUNDARY AND SEA/LAKE BREEZE COLLISIONS. OVERALL...HAVE NO PROBLEM WITH POP NUMBERS FOR TODAY...SO DON'T FORESEE NEED FOR AN UPDATE TO THE ZFP. && .AVIATION...(PREV) EXPECT MAINLY VFR OUTSIDE OF CONVECTION THAT WILL BE MOST PREVALENT ACROSS INTERIOR TERMINALS AND KDAB DURING THE MID TO LATE AFTERNOON AFTER 20Z. COULD SEE SOME EARLY ACTIVITY SIMILAR TO WED VRB-FPR-SUA ALONG ECSB 17Z-20Z. && .MARINE...LOCAL BUOY AND C-MAN DATA SHOW SSW-SW SURFACE WINDS OF 10-12KT WITH A BACKGROUND SWELL AROUND 2FT/9-10SEC. IT LOOKS AS THOUGH THE LOCAL SWAN MODEL AND TO A LESSER EXTENT THE WNAWAVE IS OVERDOING WIND CHOP CONTRIBUTION TO COMBINED SEAS IN AN OFFSHORE FLOW REGIME...SHOWING A GOOD 2FT/4SEC (PERHAPS 2-3FT IN THE SWAN) CHOP WHEN IN REALITY ITS ONLY RUNNING ABOUT A FOOT. PERHAPS THIS IS THE REASON FOR THE MODELS INSISTENCE ON COMBINED SEAS OF 4-5FT DEVELOPING OFFSHORE FOR SEVERAL DAYS NOW...WHEN THEY'VE BEEN RUNNING 2-3FT. SOME SLIGHT INCREASE IN SEAS APPEARS LIKELY AS LOW LEVEL FLOW BACKS INTO THIS WEEKEND...BUT EITHER THE PGRAD WOULD NEED TO TIGHTEN OR ADDITIONAL SWELL ENERGY WOULD HAVE TO MOVE INTO THE NEAR SHORE WATERS FOR 5FT SEAS TO BE REALIZED FRI INTO THIS WEEKEND. && .MLB WATCHES/WARNINGS/ADVISORIES... FL...NONE. AM...NONE. && FORECAST/AVIATION...CRISTALDI RADAR/IMPACT WX....WIMMER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MELBOURNE FL 1209 PM EDT THU JUN 20 2013 AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141- 144-147-202100- COASTAL WATERS FROM FLAGLER BEACH TO VOLUSIA BREVARD COUNTY LINE OUT 20 NM- COASTAL WATERS FROM VOLUSIA BREVARD COUNTY LINE TO SEBASTIAN INLET OUT 20 NM- COASTAL WATERS FROM SEBASTIAN INLET TO JUPITER INLET OUT 20 NM- WATERS FROM FLAGLER BEACH TO VOLUSIA BREVARD COUNTY LINE 20 TO 60 NM OFFSHORE- WATERS FROM VOLUSIA BREVARD COUNTY LINE TO SEBASTIAN INLET 20 TO 60 NM OFFSHORE- WATERS FROM SEBASTIAN INLET TO JUPITER INLET 20 TO 60 NM OFFSHORE- INLAND VOLUSIA-NORTHERN LAKE-ORANGE-SEMINOLE-SOUTHERN BREVARD- OSCEOLA-INDIAN RIVER-OKEECHOBEE-ST. LUCIE-MARTIN-COASTAL VOLUSIA- SOUTHERN LAKE-NORTHERN BREVARD- 1209 PM EDT THU JUN 20 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA. .DAY ONE...THIS AFTERNOON AND TONIGHT. .THUNDERSTORM IMPACT... THE INTERACTING OF THE EAST COAST SEA BREEZE AND THE PREVAILING SOUTH TO SOUTHWEST WINDFLOW WILL HELP TO PRODUCE SCATTERED LIGHTNING STORMS FROM MID TO LATE AFTERNOON THROUGH THE EVENING ALONG AN AREA THAT SHOULD STRETCH FROM NORTHERN VOLUSIA COUNTY TO EASTERN OKEECHOBEE AND THE WESTERN PORTIONS OF SAINT LUCIE AND MARTIN COUNTIES. A LINGERING STORM OR TWO OVER THE INTERIOR MAY LAST UNTIL MIDNIGHT. THE PRIMARY WEATHER HAZARDS WILL BE CLOUD GROUND LIGHTNING STRIKES...WIND GUSTS TO 45 MPH...LOCALLY HEAVY RAINFALL AND LOCALIZED TEMPORARY FLOODING DUE TO THE HEAVY RAINFALL. THE FLOODING SHOULD BE SHORT LIVED UNTIL THE DRAINAGE SYSTEMS CATCH UP TO THE LOCALLY HEAVY RAINS. .FLOOD IMPACT... SLOW STORM MOTION WILL ALLOW FOR LOCALLY HEAVY RAINFALL ACROSS EAST CENTRAL FLORIDA. RAINFALL AMOUNTS UP TO TWO TO THREE INCHES WITH THE STRONGEST STORMS WILL CAUSE PONDING OF WATER ON ROADWAYS AND POSSIBLE MINOR FLOODING OF POOR DRAINAGE AREAS. .MARINE THUNDERSTORM GUST IMPACT... THUNDERSTORMS MAY PRODUCE GUSTY WINDS TO 35 KNOTS OR GREATER ACROSS THE INLAND LAKES AND INTRACOASTAL AND NEAR SHORE ATLANTIC WATERS MAINLY NORTH OF FORT PIERCE INLET FROM THIS AFTERNOON INTO THE EVENING HOURS. .RIP CURRENT IMPACT... AN EASTERLY SWELL WILL GENERATE A MODERATE RISK OF RIP CURRENTS AT THE BEACHES. IF CAUGHT IN A RIP CURRENT...SWIM PARALLEL TO THE BEACH UNTIL OUT OF THE PULL OF THE CURRENT...AND THEN SWIM BACK TO SHORE. ALWAYS SWIM WITHIN SIGHT OF A LIFE GUARD. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. DEVELOPING SOUTHEAST FLOW ON FRIDAY INTO EARLY NEXT WEEK AND ADEQUATE MOISTURE LEVELS WILL PRODUCE SCATTERED LIGHTNING STORMS OVER THE UPCOMING WEEKEND INTO EARLY NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE REQUESTED TO MONITOR THE WEATHER AND SELF ACTIVATE IF NEEDED. VOLKMER
The Melbourne radar (KMLB), 6 km away, was scanning. The volume nearest the first event began at 17:23 UTC.
3 thunderstorm wind, 1 funnel cloud. Local standard time, as filed.
A funnel cloud was sighted over the intracoastal waters near the Melbourne Causeway.
U.S. Air Force wind tower 1007 measured a wind gust of 55 knots.
U.S. Air Force wind tower 1204 measured a 53 knot wind gust.
A tractor trailer traveling northbound on I-95 and its load was lifted off its base by a thunderstorm wind gust, causing the trailer to overturn onto the highway.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2013Every state in 2013This day in weather historyWarnings in Florida, June 2013
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 450877, 450880, 450879, 450883.