A short wave trough in the mid levels traverse the area in the afternoon over an unstable and moist low level air mass. This energy combined with convergence along the sea breezes and resultant outflow boundaries created scattered severe storms in the afternoon and evening.
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 JAX wrote it up.
A short wave trough in the mid levels traverse the area in the afternoon over an unstable and moist low level air mass. This energy combined with convergence along the sea breezes and resultant outflow boundaries created scattered severe storms in the afternoon and evening.
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 Jacksonville, FL wrote its last area forecast discussion before the first event at Jun 20, 1:49 PM EST, 16 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSONVILLE FL 249 PM EDT SUN JUN 20 2010 .SYNOPSIS...UPPER HIGHS W AND E OF THE AREA WITH WEAK TROF OVER THE IMMEDIATE COUNTY WARNING AREA. TSTMS ALREADY DEVELOPING...BOTH ALONG THE GULF COAST BREEZE AND ALONG SFC TROF WHICH EXTENDS FROM COASTAL SE GA TO THE SUWANNEE VALLEY. WITH CAPES OF 3500 J/KG... EXPECT THIS ACTIVITY TO CONTINUE TO FILL IN AS OUTFLOWS INTERACT WITH SEABREEZES. TEMPS OUTSIDE OF PRECIP AREAS RANGE FROM THE UPPER 80S ALONG THE IMMEDIATE ATLANTIC COAST TO THE LOWER TO MID 90S OVER INLAND SE GA. .SHORT TERM...THE PATTERN WILL GRADUALLY CHANGE OVER THE NEXT 48 HOURS AS UPPER TROF FILLS AND IS REPLACED BY A WEAK RIDGE JUST N OF THE AREA. AT THE SFC...THE HIGH PRESSURE RIDGE THAT HAS BEEN JUST S OF THE AREA WILL SHIFT N...ALLOWING FLOW TO BECOME MORE E. THIS WILL BRING THE POSSIBILITY OF ISOLD COASTAL SHOWERS IN THE MORNING WITH TSTMS BECOMING MORE WIDESPREAD INLAND DURING THE AFTERNOONS. TEMPERATURES WILL WARM SLIGHTLY OVER THE INTERIOR SECTIONS...WITH TEMPS NEAR NORMAL NEAR THE ATLC COAST. .LONG TERM...GFS HAS BACKED OFF ON TROPICAL WAVE DURING THE MIDDLE OF THE COMING WEEK...BUT A WAVE DOES EXIST OVER THE E CARIBBEAN. SO...HAVE MADE FEW CHANGES TO THE EXISTING FORECAST UNDER THE ASSUMPTION THAT THE GFS WILL PICK UP THE WAVE AGAIN WITH LATER RUNS. TEMPS EXPECTED TO REMAIN ABOVE NORMAL THRU THE PERIOD. && .AVIATION...TEMPO MVFR IN TS THIS AFTN FOR ALL TERMINALS LESS SSI AS SEA BREEZE HAS SHIFTED WEST OF THE SITE. REDUCED VSBYS IN BR AND LOW CIGS MOST LIKELY AT VQQ AND GNV TONIGHT...BUT ALSO INCLUDED SOME 5-6SM AT JAX DUE TO RECENT HEAVY RAINFALL. MAIN CONVECTIVE CONCERN WILL BE GUSTY WINDS TO 30 KT POSSIBLE. && .MARINE...NO HEADLINES. SSE WINDS 10-15 KTS EXPECTED WITH SEAS BUILDING FROM 2-3 FT TO 3-5 FT DUE TO PERSISTENT ELY FLOW AND BUILDING SWELLS. MAY SEE SCEC (SEAS 6 FT) WELL OFFSHORE. && .PRELIMINARY POINT TEMPS/POPS... AMG 72 93 72 93 / 30 50 10 50 SSI 77 88 76 89 / 10 20 20 20 JAX 73 90 73 91 / 30 50 20 40 SGJ 75 88 75 88 / 30 40 20 30 GNV 71 90 71 93 / 50 70 20 50 OCF 72 91 72 93 / 50 70 20 50 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...NONE. GA...NONE. AM...NONE. && CARROLL/ENYEDI/PRESNALL
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSONVILLE FL 706 AM EDT SUN JUN 20 2010 FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-211000- HAMILTON-SUWANNEE-COLUMBIA-BAKER-NASSAU-DUVAL-UNION-BRADFORD-CLAY- ST JOHNS-GILCHRIST-ALACHUA-PUTNAM-FLAGLER-MARION-COFFEE- JEFF DAVIS-BACON-APPLING-WAYNE-ATKINSON-WARE-PIERCE-BRANTLEY- INLAND GLYNN-COASTAL GLYNN-ECHOLS-CLINCH-CHARLTON-INLAND CAMDEN- COASTAL CAMDEN- 706 AM EDT SUN JUN 20 2010 THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA. .DAY ONE...TODAY AND TONIGHT... ...SCATTERED TO NUMEROUS STORMS THIS AFTERNOON... ...HEAT INDICES 100 TO 103 INLAND AREAS THIS AFTERNOON... HIGH TEMPERATURES IN THE MID 90S INLAND WILL PUSH HEAT INDICES TO 100 TO 103 DEGREES THIS AFTERNOON. EXERCISE EXTREME CAUTION WHEN OUTDOORS. SCATTERED TO NUMEROUS STORMS ARE EXPECTED TO DEVELOP TODAY MAINLY DURING THE AFTERNOON AND EVENING AS THE SEA BREEZES BEGIN TO DEVELOP AND PROGRESS INLAND. THE MOST COVERAGE OF STORMS IS EXPECTED TO BE WEST OF INTERSTATE 95. SOME STORMS WILL BE STRONG AND PRODUCE FREQUENT CLOUD TO GROUND LIGHTNING...STRONG AND GUSTY WINDS AND LOCALLY HEAVY RAINFALL OF OVER 2 INCHES. THIS HEAVY RAINFALL MAY CAUSE LOCAL FLOODING OF LOW LYING OR POOR DRAINAGE AREAS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY... SCATTERED THUNDERSTORMS ARE EXPECTED EACH AFTERNOON AND EVENING WITH THE MOST COVERAGE ACROSS THE INLAND AREAS. THE SLOW STORM MOTION WILL CONTINUE THE POTENTIAL FOR HEAVY RAINFALL AND MINOR FLOODING. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE REQUESTED TO SELF-ACTIVATE IF WARNINGS ARE ISSUED. FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN JACKSONVILLE WEBSITE ON THE INTERNET AT WEATHER.GOV/JAX. PP
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
117 PM EDT SUN JUN 20 2010
FLZ040-201800-
MARION-
117 PM EDT SUN JUN 20 2010
...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR WESTERN MARION
COUNTY FOR STRONG WINDS...SMALL HAIL AND EXCESSIVE LIGHTNING VALID
UNTIL 200 PM EDT...
AT 117 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG
THUNDERSTORMS CENTERED 5 MILES EAST OF RAINBOW LAKES ESTATES...MOVING
NORTHEAST AT 10 MPH. THESE STRONG THUNDERSTORMS WILL ALSO AFFECT
AREAS AROUND ROMEO...RAINBOW LAKES ESTATES AND OCALA AIRPORT THROUGH
200 PM EDT. HAIL UP TO THREE QUARTER INCH IN DIAMETER...EXCESSIVE
CLOUD-TO-GROUND LIGHTNING AND GUSTY WINDS OF 45 TO 55 MPH CAN BE
EXPECTED ALONG WITH POSSIBLE MINOR DAMAGE. HEAVY RAINFALL WILL
PRODUCE PONDING OF WATER ON ROADWAYS AND MINOR FLOODING OF LOW-LYING
AREAS.
REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT.
LAT...LON 2915 8251 2923 8242 2922 8241 2924 8240
2931 8231 2913 8215 2903 8241
TIME...MOT...LOC 1717Z 229DEG 8KT 2916 8235
ENYEDISPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
130 PM EDT SUN JUN 20 2010
GAZ165-201815-
INLAND CAMDEN-
130 PM EDT SUN JUN 20 2010
...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR WESTERN CAMDEN
COUNTY FOR STRONG WINDS...SMALL HAIL AND EXCESSIVE LIGHTNING VALID
UNTIL 215 PM EDT...
AT 130 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG
THUNDERSTORMS CENTERED 5 MILES NORTH OF KINGS FERRY...OR 10 MILES
SOUTHWEST OF WOODBINE...MOVING NORTHEAST AT 10 MPH. THESE STRONG
THUNDERSTORMS WILL AFFECT KINGS FERRY...COLESBURG AND WOODBINE
THROUGH 215 PM EDT. HAIL UP TO THREE QUARTER INCH IN
DIAMETER...EXCESSIVE CLOUD-TO-GROUND LIGHTNING AND GUSTY WINDS OF 45
TO 55 MPH CAN BE EXPECTED ALONG WITH POSSIBLE MINOR DAMAGE. HEAVY
RAINFALL WILL PRODUCE PONDING OF WATER ON ROADWAYS AND MINOR FLOODING
OF LOW-LYING AREAS.
REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT.
LAT...LON 3078 8184 3084 8190 3091 8189 3104 8177
3088 8166
TIME...MOT...LOC 1730Z 220DEG 10KT 3086 8182SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 212 PM EDT SUN JUN 20 2010 GAZ165-166-201900- COASTAL CAMDEN-INLAND CAMDEN- 212 PM EDT SUN JUN 20 2010 ...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR CENTRAL CAMDEN COUNTY FOR STRONG WINDS...SMALL HAIL AND EXCESSIVE LIGHTNING VALID UNTIL 300 PM EDT... AT 212 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS CENTERED ALONG A LINE EXTENDING FROM 8 MILES EAST OF WOODBINE TO 2 MILES SOUTH OF HARRIETTS BLUFF...MOVING NORTHWEST AT 5 MPH. THESE STRONG THUNDERSTORMS WILL AFFECT HARRIETTS BLUFF... WOODBINE AND COLESBURG THROUGH 300 PM EDT. HAIL UP TO THREE QUARTER INCH IN DIAMETER...EXCESSIVE CLOUD-TO-GROUND LIGHTNING AND GUSTY WINDS OF 45 TO 55 MPH CAN BE EXPECTED ALONG WITH POSSIBLE MINOR DAMAGE. HEAVY RAINFALL WILL PRODUCE PONDING OF WATER ON ROADWAYS AND MINOR FLOODING OF LOW-LYING AREAS. REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY EMERGENCY MANAGEMENT. LAT...LON 3079 8175 3105 8178 3106 8155 3081 8153 TIME...MOT...LOC 1812Z 128DEG 4KT 3100 8160 3084 8159 ENYEDI
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
302 PM EDT SUN JUN 20 2010
FLZ024-025-201945-
DUVAL-NASSAU-
302 PM EDT SUN JUN 20 2010
...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR CENTRAL NASSAU
AND NORTHERN DUVAL COUNTIES FOR STRONG WINDS...SMALL HAIL AND
EXCESSIVE LIGHTNING VALID UNTIL 345 PM EDT...
AT 302 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG
THUNDERSTORMS DEVELOPING ALONG A FROM YULEE TO CALLAHAN...MOVING
SLOWLY SOUTHEAST AT 5 MPH. THESE STRONG THUNDERSTORMS WILL AFFECT
CALLAHAN...YULEE AND RATLIFF THROUGH 345 PM EDT. HAIL UP TO THREE
QUARTER INCH IN DIAMETER...EXCESSIVE CLOUD-TO-GROUND LIGHTNING AND
GUSTY WINDS OF 45 TO 55 MPH CAN BE EXPECTED ALONG WITH POSSIBLE
MINOR DAMAGE. HEAVY RAINFALL WILL PRODUCE PONDING OF WATER ON
ROADWAYS AND MINOR FLOODING OF LOW-LYING AREAS.
REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT.
LAT...LON 3041 8193 3060 8201 3074 8172 3072 8164
3073 8163 3072 8161 3072 8159 3070 8156
3070 8153 3066 8148 3066 8147
TIME...MOT...LOC 1902Z 311DEG 2KT 3075 8164 3054 8191
ENYEDIThe Jacksonville radar (KJAX), 42 km away, was scanning. The volume nearest the first event began at 19:04 UTC.
2 thunderstorm wind. Local standard time, as filed.
Large tree limbs were blown down 1 mile from Crooked River State Park.
Several trees and power lines were blown down in Blackshear. The cost of debris removal was estimated.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Georgia in 2010Every state in 2010This day in weather historyWarnings in Georgia, June 2010
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: 228205, 228207.