A weak passing upper level short wave trough combined with the sea breeze fronts and high moisture fueled scattered storms over the area. One severe storm developed and produced wind damage in St.
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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 weak passing upper level short wave trough combined with the sea breeze fronts and high moisture fueled scattered storms over the area. One severe storm developed and produced wind damage in St. Johns 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 Jacksonville, FL wrote its last area forecast discussion before the first event at May 11, 1:19 PM EST, 2 hours 16 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSONVILLE FL 219 PM EDT SAT MAY 11 2013 .SHORT TERM /TONIGHT THROUGH TUESDAY/... LITTLE IN THE WAY OF ACTIVITY EARLY THIS AFTN...AS A COMPLEX OF SHOWERS/STORMS ACROSS THE NE GULF CONTINUE TO SLOWLY DIMINISH AS THE COMPLEX APPROACHES THE BIG BEND. ALONG THE EAST COAST...THE SEABREEZE REMAINS PINNED TO THE IMMEDIATE COAST AS BREEZY SYNOPTIC SW FLOW PREVAILS. THINK SEABREEZE CONVECTION WILL BE RATHER LIMITED LATER THIS AFTN...WITH ACTIVITY FROM THE WEST CONTINUING TO DECAY AS IT ENTERS THE LOCAL AREA. WILL USE ISOLATED TO LOW END SCATTERED POPS ALONG THE EAST COAST LATE THIS AFTN/EARLY EVENING...WITH MID/HIGH END SCATTERED POPS INLAND. AFTER A LULL IN ACTIVITY LATER THIS EVENING INTO THE OVERNIGHT...A COLD FRONT WILL APPROACH INTERIOR SE GA LATE OVERNIGHT WITH SCATTERED SHOWERS AND PERHAPS AN ISOLATED TSTM OR TWO. LOW TEMPERATURES IN THE MID/UPPER 60S WILL PREVAIL. THE SURFACE COLD FRONT WILL CROSS SE GA SUNDAY MORNING...MOVING INTO NE FL BY AFTERNOON. WITH THE GREATEST FORCING REMAINING WELL TO THE NORTH...WILL KEEP POPS SCATTERED WITH THE FRONTAL CROSSING...WITH COVERAGE DECREASING ACROSS SE GA IN THE AFTN. HIGH TEMPERATURES SUNDAY WILL RANGE FROM THE LOWER 80S ACROSS INTERIOR SE GA...WITH MID/UPPER 80S ELSEWHERE. AS THE FRONT EXITS SOUTHEAST SUNDAY NIGHT...ANY REMAINING SHOWERS WILL DISSIPATE. AS HIGH PRESSURE BUILDS TO THE WEST OF THE REGION MONDAY...COOLER AND DRIER AIR WILL ADVECT IN. PRESSURE GRADIENT WILL BE SOMEWHAT TIGHTENED INTO MONDAY...SO EXPECT WINDS TO BE ELEVATED. THIS HIGH WILL SLIDE OVERHEAD INTO TUESDAY...YIELDING MAINLY CLEAR SKIES WITH TEMPS A LITTLE BELOW NORMAL. .LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/... THE SURFACE RIDGE WILL SLOWLY SLIDE EAST OF THE REGION FOR THE REST OF THE WEEK INTO THE WEEKEND. THE WESTERN SIDE OF THE RIDGE BREAKS DOWN ENOUGH LATE IN THE PERIOD FOR PRECIPITATION CHANCES TO RETURN AS WEAK FRONTAL BOUNDARIES SLIDE INTO THE SOUTHEASTERN US. AFTER A COOLER THAN NORMAL NIGHT TUESDAY NIGHT...READINGS WILL RETURN TO NORMAL LEVELS FOR WEDNESDAY THROUGH SATURDAY. && .AVIATION... PREVAILING VFR CONDITIONS ARE EXPECTED FOR THIS AFTERNOON...WITH SCATTERED CONVECTION. AT THIS POINT FAVORING VCTS FOR THUNDERSTORMS GIVEN LOWER CONFIDENCE IN COVERAGE AND TIMING. AFTER A WAVE PASSES EAST THIS EVENING...AN AREA OF MVFR CLOUD COVER IS EXPECTED TO ADVECT IN...WITH AREAS THAT RECEIVE RAINFALL THIS AFTERNOON POSSIBLY GETTING LIGHT FOG OVERNIGHT. A COLD FRONT WILL MOVE SOUTHEAST ACROSS THE REGION SUNDAY...WITH SCATTERED CONVECTION AGAIN A POSSIBILITY. && .MARINE... BENIGN CONDITIONS WILL PREVAIL THROUGH SUNDAY ALONG AND IN ADVANCE OF A COLD FRONT. WINDS WILL SHIFT TO THE NORTH BEHIND THE FRONT SUNDAY NIGHT AND INCREASE TO SCA FOR THE OUTER WATERS MONDAY. WINDS WILL DECREASE TUESDAY...TURNING BACK TO THE SOUTH FOR MID/LATE NEXT WEEK. RIP CURRENTS: LOW RISK THROUGH SUNDAY. && .FIRE WEATHER... A NOTICEABLY COOLER AND DRIER AIR MASS WILL ADVECT SOUTH INTO THE REGION ON MONDAY AS HIGH PRESSURE BUILDS TO THE WEST...FOLLOWING TOMORROWS FRONTAL PASSAGE. A FAIRLY TIGHT PRESSURE GRADIENT IS EXPECTED ON THE EAST SIDE OF THIS HIGH INTO MONDAY...KEEPING WIND SPEEDS ELEVATED. RH VALUES ARE EXPECTED TO FALL TO AROUND CRITICAL LEVELS MONDAY. THEREFORE...RED FLAG CONDITIONS MAY BE POSSIBLE ON MONDAY. && .PRELIMINARY POINT TEMPS/POPS... AMG 63 81 50 78 / 50 20 10 10 SSI 67 80 58 77 / 30 30 10 10 JAX 67 84 55 79 / 30 30 10 10 SGJ 67 84 62 76 / 30 40 20 10 GNV 65 84 58 80 / 30 40 20 10 OCF 66 85 62 81 / 30 50 20 10 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...NONE. GA...NONE. AM...NONE. && ALLEN/STRUBLE/GUILLET
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSONVILLE FL 405 PM EDT SAT MAY 11 2013 AMZ450-452-454-470-472-474-FLZ020>025-030>033-035>038-040- GAZ132>136-149>154-162>166-120830- 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- 405 PM EDT SAT MAY 11 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST FLORIDA... SOUTHEAST GEORGIA AND THE ADJACENT COASTAL WATERS. .DAY ONE...REST OF TODAY AND TONIGHT... SCATTERED TO NUMEROUS SHOWERS AND SCATTERED THUNDERSTORMS ARE EXPECTED REST OF TODAY AND INTO THE EVENING HOURS. MOST OF THE ACTIVITY WILL ACROSS NORTHEAST FLORIDA AND THE ADJACENT COASTAL WATERS. A FEW STORMS MAY CONTAIN STRONG GUSTY WINDS UP TO 50 MPH AND SMALL HAIL. STORM MOTION IS EAST AT 20 TO 30 MPH. MOST OF THE THUNDERSTORM ACTIVITY WILL WEAKEN AFTER 8 PM. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY... SCATTERED SHOWERS AND THUNDERSTORMS ARE EXPECTED ON SUNDAY AS A COLD FRONT MOVES SLOWLY SOUTHEASTWARD ACROSS THE REGION. .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
418 PM EDT SAT MAY 11 2013
FLZ025-033-112100-
DUVAL-ST. JOHNS-
418 PM EDT SAT MAY 11 2013
...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR NORTHERN ST.
JOHNS AND SOUTHEASTERN DUVAL COUNTIES FOR STRONG WINDS...SMALL HAIL
AND EXCESSIVE LIGHTNING VALID UNTIL 500 PM EDT...
AT 418 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG
THUNDERSTORMS CENTERED 4 MILES SOUTHWEST OF DURBIN...MOVING EAST AT
25 MPH. THESE STRONG THUNDERSTORMS WILL ALSO AFFECT AREAS AROUND
WORLD GOLF VILLAGE...PICOLATA...FRUIT COVE...BAYARD...BAKERSVILLE...
DURBIN...NOCATEE...VILANO BEACH...SOUTH PONTE VEDRA BEACH AND
SAWGRASS THROUGH 500 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 2989 8159 3014 8165 3024 8138 3015 8134
3001 8131 2991 8128 2990 8128
TIME...MOT...LOC 2018Z 248DEG 21KT 3006 8151
STRUBLESPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 432 PM EDT SAT MAY 11 2013 FLZ025-032-033-112100- CLAY-DUVAL-ST. JOHNS- 432 PM EDT SAT MAY 11 2013 ...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR EASTERN CLAY... NORTHERN ST. JOHNS AND SOUTHEASTERN DUVAL COUNTIES FOR STRONG WINDS AND SMALL HAIL VALID UNTIL 500 PM EDT... AT 432 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS CENTERED 4 MILES SOUTHWEST OF GREEN COVE SPRINGS... MOVING EAST AT 25 MPH. THESE STRONG THUNDERSTORMS WILL ALSO AFFECT AREAS AROUND PENNEY FARMS...GREEN COVE SPRINGS...SWITZERLAND... PICOLATA...FRUIT COVE...WORLD GOLF VILLAGE...NOCATEE...DURBIN AND BAYARD THROUGH 500 PM EDT. HAIL UP TO THREE QUARTER INCH IN DIAMETER AND GUSTY WINDS OF 45 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 3018 8144 2997 8135 2985 8176 3002 8184 TIME...MOT...LOC 2032Z 249DEG 21KT 2997 8170 STRUBLE
The Jacksonville radar (KJAX), 63 km away, was scanning. The volume nearest the first event began at 20:36 UTC.
1 thunderstorm wind. Local standard time, as filed.
Trees and limbs were blown down in Guana River State Park. The time of damage was based on radar imagery.
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, May 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: 440013.