Severe thunderstorms affected the area around Lake Okeechobee with high wind and hail.
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 MFL wrote it up.
Severe thunderstorms affected the area around Lake Okeechobee with high wind and hail.
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 Miami, FL wrote its last area forecast discussion before the first event at Jun 17, 2:55 PM EST, 2 hours 18 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MIAMI FL 355 PM EDT FRI JUN 17 2011 .UPDATE...ISOLATED SEVERE TSTORMS ARE BECOMING A CONCERN ACROSS THE LAKE OKEECHOBEE REGION TO EASTERN COLLIER COUNTY...GIVEN SUCH STRONG SURFACE HEATING (UPPER 90S) AND EXCELLENT LAPSE RATES IN THE HAIL GROWTH LAYER ALONG WITH MID LEVEL DRY AIR. JUST EXTREMELY HIGH INSTABILITY. DAMAGING WINDS 60-70 MPH AND GOLF BALL HAIL IS POSSIBLE. THE HAZARDOUS WX OUTLOOK WAS UPDATED FOR THIS SEVERE POTENTIAL. /GREGORIA && .DISCUSSION...ALOFT RIDGES ARE LOCATED OVER N FL AND OVER THE NW CARIBBEAN WITH A SMALL AND WEAK TROUGH SQUEEZED BETWEEN OVER S FL. THIS IS ALLOWING SUBSIDENCE TO OCCUR OVER THE LOCAL AREA AND EVEN THOUGH THE SURFACE RIDGE AXIS TO THE NORTH HAS ALLOWED THE SE FLOW TO INCREASE LOW LVL MOISTURE OVER THE PAST 24 HRS, SHRA AND TS ARE HAVING A HARD TIME DEVELOPING. EVENTUALLY STRONG HEATING, HIGH LOW LVL MOISTURE CONTENT, AND SURFACE CONVERGENCE FROM SEA BREEZES WILL PRODUCE SCT CONVECTION, BUT MAINLY INTERIOR AND JUST INLAND FROM THE WEST COAST. THROUGH THE WEEKEND MOISTURE LVLS WILL INCREASE AND AT TIMES CLIMB TO AROUND 2" PWATS AS AN INVERTED TROUGH PASSES TO THE SOUTH. THE REGION WILL REMAIN MOSTLY UNDER THE INFLUENCE OF SURFACE RIDGE WITH THE AXIS OF THE RIDGE REMAIN NORTH OF THE AREA. SEA BREEZE CONVERGENCE WILL BE THE MAIN STORM FOCUS WITH MOST CONVECTION BEING INTERIOR AND WEST WITH THE SE FLOW. NEXT WEEK SHOWERS AND THUNDERSTORMS ARE EXPECTED EACH DAY/AFTERNOON, HOWEVER MODELS DO VARY SLIGHTLY WITH THE PLACEMENT OF THE UPPER RIDGE AND TROUGH OVER THE REGION WHICH MAY SLIGHTLY RAISE OF LOWER POPS DEPENDING WHERE THE PLACEMENT OF EACH FEATURE IS. && .AVIATION...SCT TO BKN CU FIELD WITH BASES AROUND 4 KFT WILL CONTINUE TO DEVELOP THROUGH THE MID/LATE AFTERNOON PERIOD AS TEMPERATURES RISE AND THE EAST COAST SEA BREEZE CONTINUES TO PENETRATE INLAND. OUTSIDE OF A FEW SHOWERS THAT HAVE ALREADY DEVELOPED ALONG THE SEA BREEZE JUST WEST OF TMB...MOST OF THE AFTERNOON ACTIVITY IS EXPECTED TO REMAIN FURTHER INLAND AND TOWARD THE GULF COAST AREAS OVER COLLIER...HENDRY AND GLADES COUNTIES THROUGH THE EARLY EVENING PERIOD. THE PRIMARY LOW-LEVEL FLOW WILL REMAIN OUT OF THE SOUTHEAST THROUGH THE 24 HR TAF PERIOD IN THE LIGHT TO MODERATE RANGE. WILL ONLY INSERT VCTS FOR THE APF TERMINAL AT THIS TIME AS THE HEAVIEST SHOWERS AND STORMS SHOULD REMAIN JUST INLAND. ANY STORMS THAT DO AFFECT THE TERMINAL...BRIEF MVFR PERIODS WILL BE POSSIBLE DUE TO REDUCED VSBYS/CIGS. A RETURN OF VFR CONDITIONS WILL BE EXPECTED THROUGH THE OVERNIGHT PERIOD WITH LIGHT WINDS. FOR SATURDAY...VERY SIMILAR CONDITIONS WILL BE EXPECTED WITH SOUTHEAST WINDS CONTINUING. 85/AG && .MARINE...THE RIDGE AXIS IS EXPECTED TO REMAIN NORTH OF THE AREA INTO EARLY NEXT WEEK WHICH WILL KEEP THE REGION IN A GENTLE TO MODERATE SOUTHEAST FLOW. THIS WILL ALSO KEEP SEAS AT 4 FEET OR LESS THROUGH THE PERIOD. && .FIRE WEATHER...MOISTURE LEVELS ARE EXPECTED TO REMAIN OUT OF CRITICAL VALUES THROUGH THE PERIOD. && .PRELIMINARY POINT TEMPS/POPS... WEST PALM BEACH 78 91 77 90 / 10 30 30 40 FORT LAUDERDALE 80 90 79 89 / 10 30 30 40 MIAMI 79 92 79 90 / 10 30 30 40 NAPLES 76 92 74 91 / 20 40 30 40 && .MFL WATCHES/WARNINGS/ADVISORIES... FL...NONE. AM...NONE. GM...NONE. && DISCUSSION/MARINE...04/AT AVIATION/RADAR/FIRE...85/AG
HAZARDOUS WEATHER OUTLOOK FOR SOUTH FLORIDA NATIONAL WEATHER SERVICE MIAMI FL 344 PM EDT FRI JUN 17 2011 FLZ063-066>075-168-172>174-180400- GLADES-HENDRY-INLAND PALM BEACH-METRO PALM BEACH-COASTAL COLLIER- INLAND COLLIER-INLAND BROWARD-METRO BROWARD-INLAND MIAMI DADE- METRO MIAMI DADE-MAINLAND MONROE-COASTAL PALM BEACH- COASTAL BROWARD-COASTAL MIAMI DADE-FAR SOUTH MIAMI DADE- 344 PM EDT FRI JUN 17 2011 ...A FEW SEVERE THUNDERSTORMS POSSIBLE LAKE OKEECHOBEE REGION THROUGH EARLY THIS EVENING.... ...AFTERNOON HEAT INDICES 100 TO 104 DEGREES... THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH FLORIDA. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS: SCATTERED THUNDERSTORMS WILL CONTINUE TO DEVELOP THIS AFTERNOON AND EARLY EVENING WITH THE HIGHEST CHANCE ACROSS THE LAKE OKEECHOBEE REGION AND TOWARD THE GULF COAST. A FEW THUNDERSTORMS ACROSS INTERIOR COLLIER...GLADES...HENDRY...AND INTERIOR PALM BEACH COUNTY MAY BECOME SEVERE CONTAINING DAMAGING WINDS AND LARGE HAIL. WIND: DAMAGING WINDS OF 60 TO 70 MPH WILL BE POSSIBLE ACROSS THE LAKE OKEECHOBEE REGION INTO EASTERN COLLIER COUNTY. HAIL: LARGE HAIL OF HALF DOLLAR TO GOLF BALL SIZE WILL BE POSSIBLE ACROSS THE LAKE OKEECHOBEE REGION. TEMPERATURES: HEAT INDEX VALUES WILL PEAK BETWEEN 100 AND 104 DEGREES ACROSS SOUTH FLORIDA THIS AFTERNOON, EXCEPT THE IMMEDIATE EAST AND WEST COASTS. RIP CURRENTS: SOUTHEAST WINDS AROUND 10 KNOTS WILL RESULT IN A SLIGHT RISK OF RIP CURRENTS ALONG THE ATLANTIC BEACHES OF PALM BEACH, BROWARD AND MIAMI-DADE TODAY. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY ISOLATED TO SCATTERED THUNDERSTORMS ARE POSSIBLE THROUGH THE PERIOD. .SPOTTER INFORMATION STATEMENT... WIDESPREAD SPOTTER ACTIVATION IS NOT ANTICIPATED, HOWEVER INDIVIDUAL SPOTTERS ARE ENCOURAGED TO REPORT HIGH WIND, HAIL AND FLOODING TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN MIAMI. FOR MORE INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN MIAMI WEBSITE AT WWW.WEATHER.GOV/MIAMI. GREGORIA
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
343 PM EDT FRI JUN 17 2011
FLZ070-071-172030-
INLAND BROWARD COUNTY FL INLAND COLLIER COUNTY FL
343 PM EDT FRI JUN 17 2011
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
* SIGNIFICANT WEATHER ADVISORY FOR...
NORTHWESTERN BROWARD COUNTY
EAST CENTRAL COLLIER COUNTY
* UNTIL 430 PM EDT
* AT 337 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 6 MILES SOUTHEAST OF MICCOSUKEE SERVICE
PLAZA...AND MOVING NORTHWEST AT 10 MPH. ADDITIONAL STRONG STORMS
WERE DEVELOPING OVER THE BIG CYPRESS OF EASTERN COLLIER COUNTY.
* THE STORM WILL AFFECT...
BIG CYPRESS NATIONAL PRESERVE...
MICCOSUKEE SERVICE PLAZA...
COLLIER/BROWARD LINE AND ALLIGATOR ALLEY...
AND SURROUNDING COMMUNITIES.
FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 45 T0 55 MPH...UP
TO NICKEL-SIZED HAIL...TORRENTIAL DOWNPOURS...OR A COMBINATION OF
THESE ARE POSSIBLE. LIGHTNING IS THE NUMBER ONE WEATHER RELATED
KILLER IN FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. THESE
WINDS CAN DOWN SMALL TREE LIMBS AND BRANCHES...AND BLOW AROUND
UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE BUILDING UNTIL THE
STORM PASSES.
RESIDENTS NEAR THE PATH OF SHOULD REMAIN ON THE ALERT FOR ADDITIONAL
STATEMENTS AND POSSIBLE WARNINGS.
LAT...LON 2626 8128 2625 8127 2626 8088 2633 8088
2633 8074 2607 8065 2587 8118
TIME...MOT...LOC 1943Z 157DEG 7KT 2612 8078
GREGORIASPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MIAMI FL 423 PM EDT FRI JUN 17 2011 FLZ066-067-070-071-172100- HENDRY FL INLAND BROWARD COUNTY FL INLAND COLLIER COUNTY FL INLAND PALM BEACH COUNTY FL 423 PM EDT FRI JUN 17 2011 THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A * SIGNIFICANT WEATHER ADVISORY FOR... WESTERN BROWARD COUNTY SOUTHWESTERN PALM BEACH COUNTY SOUTHEASTERN HENDRY COUNTY EAST CENTRAL COLLIER COUNTY * UNTIL 500 PM EDT * AT 421 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A LINE OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 7 MILES NORTH OF MICCOSUKEE SERVICE PLAZA TO MILE MARKER 60 ON ALLIGATOR ALLEY...AND MOVING NORTHWEST AT 10 MPH. * THE LINE OF STORMS WILL AFFECT... MILE MARKER 60 ON ALLIGATOR ALLEY... HOLEY LAND WILDLIFE MANAGEMENT AREA... BIG CYPRESS SEMINOLE INDIAN RESERVATION... AND SURROUNDING COMMUNITIES. FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 45 T0 55 MPH...UP TO NICKEL-SIZED HAIL...AND TORRENTIAL DOWNPOURS ARE EXPECTED WITH THESE STRONG THUNDERSTORMS. LIGHTNING IS THE NUMBER ONE WEATHER RELATED KILLER IN FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. THESE WINDS CAN DOWN SMALL TREE LIMBS AND BRANCHES...AND BLOW AROUND UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE BUILDING UNTIL THE STORM PASSES. STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER DETAILS OR UPDATES. LAT...LON 2604 8057 2608 8107 2632 8132 2650 8070 TIME...MOT...LOC 2022Z 137DEG 9KT 2627 8081 2618 8105 GREGORIA
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
506 PM EDT FRI JUN 17 2011
FLZ067-172130-
INLAND PALM BEACH COUNTY FL
506 PM EDT FRI JUN 17 2011
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
* SIGNIFICANT WEATHER ADVISORY FOR...
NORTH CENTRAL PALM BEACH COUNTY
* UNTIL 530 PM EDT
* AT 504 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 3 MILES NORTHEAST OF CANAL POINT...AND MOVING
NORTHWEST AT 10 MPH.
* THE STORM WILL AFFECT...
AREAS BETWEEN CANAL POINT AND THE MARTIN COUNTY LINE...
AND SURROUNDING COMMUNITIES.
FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 45 T0 55 MPH...UP
TO NICKEL-SIZED HAIL...TORRENTIAL DOWNPOURS...OR A COMBINATION OF
THESE ARE POSSIBLE. LIGHTNING IS THE NUMBER ONE WEATHER RELATED
KILLER IN FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. THESE
WINDS CAN DOWN SMALL TREE LIMBS AND BRANCHES...AND BLOW AROUND
UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE BUILDING UNTIL THE
STORM PASSES.
LAT...LON 2688 8044 2679 8055 2687 8064 2690 8062
2693 8062 2696 8062 2696 8061 2696 8048
TIME...MOT...LOC 2105Z 114DEG 8KT 2690 8060
GREGORIASPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
534 PM EDT FRI JUN 17 2011
FLZ063-172200-
GLADES FL
534 PM EDT FRI JUN 17 2011
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
* SIGNIFICANT WEATHER ADVISORY FOR...
WEST CENTRAL GLADES COUNTY
* UNTIL 600 PM EDT
* AT 530 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
STRONG THUNDERSTORM 6 MILES SOUTHWEST OF VENUS...AND MOVING
NORTHEAST AT 15 MPH. ADDITIONAL STRONG STORMS WERE DEVELOPING TO
THE SOUTHWEST ACROSS RURAL WESTERN GLADES COUNTY.
FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 45 T0 55 MPH...UP
TO NICKEL-SIZED HAIL...TORRENTIAL DOWNPOURS...OR A COMBINATION OF
THESE ARE POSSIBLE. LIGHTNING IS THE NUMBER ONE WEATHER RELATED
KILLER IN FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. THESE
WINDS CAN DOWN SMALL TREE LIMBS AND BRANCHES...AND BLOW AROUND
UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE BUILDING UNTIL THE
STORM PASSES.
STAY TUNED TO NOAA WEATHER RADIO AND OTHER LOCAL MEDIA FOR FURTHER
DETAILS OR UPDATES.
LAT...LON 2705 8133 2703 8133 2684 8148 2688 8157
2697 8157 2704 8156 2703 8135 2713 8126
2712 8125
TIME...MOT...LOC 2134Z 211DEG 15KT 2702 8141
GREGORIASPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MIAMI FL
557 PM EDT FRI JUN 17 2011
FLZ063-066-172245-
GLADES FL HENDRY FL
557 PM EDT FRI JUN 17 2011
THE NATIONAL WEATHER SERVICE IN MIAMI HAS ISSUED A
* SIGNIFICANT WEATHER ADVISORY FOR...
GLADES COUNTY
NORTHERN HENDRY COUNTY
* UNTIL 645 PM EDT
* AT 552 PM EDT...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED A
BAND OF STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 5 MILES
NORTH OF DEVILS GARDEN TO 7 MILES SOUTHEAST OF LA BELLE...AND
MOVING NORTHWEST AT 15 MPH. ADDITIONAL STRONG STORMS OVER LAKE
OKEECHOBEE WILL MOVE NORTHWEST TO AFFECT NORTHEASTERN GLADES
COUNTY. STRONG STORMS CONTINUE OVER WESTERN GLADES COUNTY AS WELL.
* THE LINE OF STORMS WILL AFFECT...
MOORE HAVEN...
LA BELLE...
ORTONA...
LAKEPORT...
AND SURROUNDING COMMUNITIES.
FREQUENT TO EXCESSIVE LIGHTNING...GUSTY WINDS FROM 45 T0 55 MPH...UP
TO NICKEL-SIZED HAIL...TORRENTIAL DOWNPOURS...OR A COMBINATION OF
THESE ARE POSSIBLE. LIGHTNING IS THE NUMBER ONE WEATHER RELATED
KILLER IN FLORIDA. TREES AND OPEN SHELTERS OFFER NO PROTECTION. THESE
WINDS CAN DOWN SMALL TREE LIMBS AND BRANCHES...AND BLOW AROUND
UNSECURED SMALL OBJECTS. SEEK SHELTER IN A SAFE BUILDING UNTIL THE
STORM PASSES.
RESIDENTS NEAR THE PATH OF SHOULD REMAIN ON THE ALERT FOR ADDITIONAL
STATEMENTS AND POSSIBLE WARNINGS.
LAT...LON 2720 8093 2707 8094 2704 8093 2703 8097
2705 8097 2698 8107 2692 8107 2693 8110
2690 8111 2683 8106 2682 8094 2663 8094
2653 8155 2665 8157 2703 8157 2703 8127
2712 8127 2713 8118 2720 8117 2722 8109
TIME...MOT...LOC 2155Z 137DEG 12KT 2669 8111 2668 8140
GREGORIAPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
606 PM EDT FRI JUN 17 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0545 PM TSTM WND GST 7 W PAHOKEE 26.82N 80.78W
06/17/2011 M53.00 MPH AMZ610 FL MESONET
A THUNDERSTORM PRODUCED A WIND GUST OF 53 MPH AT MESONET
SITE L006 OVER LAKE OKEECHOBEE.
0545 PM TSTM WND GST 10 NW PAHOKEE 26.90N 80.79W
06/17/2011 M45.00 MPH AMZ610 FL MESONET
A THUNDERSTORM PRODUCED A WIND GUST OF 45 MPH AT MESONET
SITE LZ40 OVER LAKE OKEECHOBEE.
&&
CARACOZZAThe Tampa radar (KTBW), 144 km away, was scanning. The volume nearest the first event began at 22:11 UTC.
1 thunderstorm wind, 1 hail. Local standard time, as filed.
A report was received of a tree broken in half near Edison Community College in Labelle.
Large hail was reported in the Muse and Ortona areas.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2011Every state in 2011This day in weather historyWarnings in Florida, June 2011
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: 319894, 319893.