Mean troughing to the west and northwest continued a moist and unstable flow over the area. The west coast sea breeze advanced inland and merged with the east coast sea breeze near the east coast during the late 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.
Mean troughing to the west and northwest continued a moist and unstable flow over the area. The west coast sea breeze advanced inland and merged with the east coast sea breeze near the east coast during the late afternoon and evening. Isolated strong to severe storms developed.
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 Aug 16, 8:53 AM EST, 3 hours 57 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSONVILLE FL 953 AM EDT THU AUG 16 2012 .UPDATE...SFC DATA SHOWS HIGH PRES RIDGE AXIS OVER CENTRAL FL WITH PREVAILING FLOW FROM THE WSW OVER THE LOCAL AREA. MOISTURE LEVELS HAVE NOTED TO INCREASE THE PAST FEW DAYS WITH PWAT OF NEAR 2 INCHES AND MEAN 1000-500 MB VALUES JUST SHY OF 70%. A COUPLE OF MID LEVEL SHORTWAVES NOTED IN THE MODEL GUIDANCE WITH ONE OVER SRN GA AND ANOTHER ONE IN THE NE GULF OF MEXICO. AS A RESULT...WE CURRENTLY SEE VERY ISOLD SHOWERS NOW JUST ENTERING OUR FAR NW ZONES AND SW ZONES. SOME MID TO HIGH CLOUD COVER MAY DECREASE THE UPWARD SWING IN MAX TEMPS TODAY ESPECIALLY OVER SE GA. THINK SCT COVERAGE OF SHOWERS AND STORMS LOOKS GOOD TODAY WITH BEST CHANCES INITIALLY OVER OUR EXTREME N AND S ZONES AND FILLING IN BETTER FROM ALACHUA COUNTY TO MARION COUNTY THROUGH NOON. ACTIVITY WILL GRADUALLY SPREAD EWD WITH THE MEAN FLOW FROM 270 DEG AT 14 KT. MODIFIED JAX SOUNDING SBCAPE FOR 92/72 WAS NEAR 3400 J/KG AND MPDI VALUE OF ABOUT 1. THUS...COULD CERTAINLY SEE A FEW STRONG TO POTENTIALLY SEVERE STORMS IN THE MID TO LATE AFTN HRS. && .AVIATION...SCT-LCL CU DEVELOPING 2 KFT EARLY THIS MORNING. ISOLD SHOWERS MAY IMPACT GNV TERMINAL WITHIN NEXT FEW HRS...WITH VCTS ANTICIPATED FOR TAFS IN THE AFTN. TOO EARLY TO INSERT ANY TEMPO GROUPS BUT ANTICIPATING AMDS FOR GNV AND VQQ IN THE MORNING. && .MARINE...NO CHANGES. WINDS S TO SW NEAR 10 KT AND SEAS 2-3 FT. ISOLD TO SCT STORM ACTIVITY POSSIBLE FROM ABOUT 2 PM INTO THE EVENING. RIP CURRENTS: LOW RISK FOR TODAY AND LIKELY ON FRI AS WELL...DUE TO LOW SEA/SWELL HEIGHTS NEARSHORE OF 2 FT OR LESS. && .PRELIMINARY POINT TEMPS/POPS... AMG 93 72 92 72 / 30 30 30 20 SSI 91 76 90 74 / 30 20 30 20 JAX 93 73 91 72 / 40 30 30 20 SGJ 91 74 89 74 / 30 30 30 20 GNV 93 71 90 72 / 30 20 30 20 OCF 93 72 90 72 / 30 20 30 20 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...NONE. GA...NONE. AM...NONE. && SHASHY/MCALLISTER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSONVILLE FL 251 AM EDT THU AUG 16 2012 AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040- GAZ132>136-149>154-162>166-171000- ALTAMAHA SOUND GA TO FERNANDINA BEACH FL OUT 20 NM- FERNANDINA BEACH TO ST AUGUSTINE FL OUT 20 NM- ST AUGUSTINE TO FLAGLER BEACH FL OUT 20 NM- ALTAMAHA SOUND GA TO FERNANDINA BEACH FL 20 NM TO 60 NM OFFSHORE- FERNANDINA BEACH TO ST AUGUSTINE FL 20 NM TO 60 NM OFFSHORE- ST AUGUSTINE TO FLAGLER BEACH FL 20 NM TO 60 NM OFFSHORE-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- 251 AM EDT THU AUG 16 2012 THIS OUTLOOK IS FOR NORTHEAST FLORIDA...SOUTHEAST GEORGIA AND THE ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT... ISOLATED TO SCATTERED THUNDERSTORMS ARE EXPECTED TO DEVELOP AND MOVE WEST TO EAST ACROSS THE REGION TODAY. THE FIRST STORMS ARE EXPECTED TO MOVE IN FROM THE GULF THIS MORNING AND AFFECT AREAS WEST OF INTERSTATE 75...THEN INCREASE IN COVERAGE AND MOVE FURTHER INLAND DURING THE AFTERNOON WITH DAYTIME HEATING. A FEW OF THE STORMS COULD BECOME STRONG WITH GUSTY WINDS. ANY STORMS WHICH DO DEVELOP ARE EXPECTED TO DISSIPATE DURING THE EVENING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY... ISOLATED TO SCATTERED THUNDERSTORM ACTIVITY IS EXPECTED THROUGH THE PERIOD. A FEW STRONG STORMS WILL BE POSSIBLE EACH DAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT REQUESTED AT THIS TIME. FOR ADDITIONAL INFORMATION...VISIT THE NATIONAL WEATHER SERVICE IN JACKSONVILLE WEBSITE ON THE INTERNET AT WEATHER.GOV/JAX.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
1229 PM EDT THU AUG 16 2012
FLZ036-161700-
ALACHUA-
1229 PM EDT THU AUG 16 2012
...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR CENTRAL
ALACHUA COUNTY FOR STRONG WINDS VALID UNTIL 100 PM EDT...
AT 1229 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED 5 MILES EAST OF NEWBERRY...OR 12 MILES
WEST OF GAINESVILLE...MOVING EAST TO SOUTHEAST AT 15 MPH. THIS
STRONG THUNDERSTORM WILL AFFECT AREAS AROUND NEWBERRY AND ARCHER
THROUGH 100 PM EDT. GUSTY WINDS OF 35 TO 50 MPH CAN BE EXPECTED
ALONG WITH POSSIBLE MINOR WIND DAMAGE. FREQUENT LIGHTNING IS
OCCURRING WITH THIS STORM.
REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT.
LAT...LON 2952 8257 2953 8257 2953 8260 2955 8264
2973 8261 2966 8229 2950 8233 2950 8252
TIME...MOT...LOC 1629Z 280DEG 13KT 2962 8252
SHASHYSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
117 PM EDT THU AUG 16 2012
FLZ040-161800-
MARION-
117 PM EDT THU AUG 16 2012
...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR CENTRAL MARION
COUNTY FOR STRONG WINDS AND FREQUENT LIGHTNING VALID UNTIL 200 PM
EDT...
AT 116 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
STRONG THUNDERSTORM CENTERED 6 MILES WEST OF LOWELL...OR 11 MILES
SOUTHEAST OF WILLISTON...MOVING EAST AT 15 MPH. THIS STRONG
THUNDERSTORM WILL ALSO AFFECT AREAS AROUND REDDICK...LOWELL...
OCALA...ANTHONY...SPARR...SILVER SPRINGS SHORES...SANTOS AND BURBANK
THROUGH 200 PM EDT. ANOTHER STORM JUST WEST OF BELLEVIEW WILL MOVE
EAST AT 15 MPH. FREQUENT CLOUD-TO-GROUND LIGHTNING AND GUSTY WINDS
OF 40 TO 55 MPH CAN BE EXPECTED ALONG WITH POSSIBLE MINOR DAMAGE.
REPORT DAMAGE TO THE NEAREST LAW ENFORCEMENT AGENCY OR YOUR COUNTY
EMERGENCY MANAGEMENT.
LAT...LON 2896 8219 2922 8239 2940 8238 2942 8203
2935 8199 2896 8197
TIME...MOT...LOC 1716Z 271DEG 12KT 2930 8228
SHASHYThe national radar mosaic for the moment the first event began.
1 thunderstorm wind, 1 lightning. Local standard time, as filed.
The County Road Department reported a tree blown down on SE 58th Avenue between Highway 42 and SE 177th Place.
A lightning strike damaged power lines near U.S. Highway 1 and County Road 13 in Bunnell. The cost of damage was estimated.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2012Every state in 2012This day in weather historyWarnings in Florida, August 2012
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: 399383, 399382.