Thunderstorm Wind, Nassau
- When
- July 16, 8:24 PM EST
- Where
- Nassau County, Callahan
- Measured
- 50 kt (58 mph) estimated gust
- Reported by
- EMERGENCY MANAGER
- Coordinates
- 30.567, -81.817
Damaging Wind in Florida, July 16, 2004
Porch roof blown over home and onto a shed in the backyard which was destroyed.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 1
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.
What happened
The episode as NWS JAX wrote it up.
Porch roof blown over home and onto a shed in the backyard which was destroyed.
What forecasters said that day
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 Jul 16, 12:50 PM EST, 7 hours 34 minutes earlier.
Area forecast discussion, Jul 16, 12:50 PM EST, 7 hours 34 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE JACKSONVILLE FL 150 PM EDT FRI JUL 16 2004 .SHORT TERM...DEEP UPPER LEVEL TROF AXIS HAS NOW PUSHED A BIT SE OF THE CWA (COUNTY WARNING AREA). SIGNIFICANT DRYING HAS OCCURRED PER 12Z KJAX SOUNDING AND H2O VAPOR LOOP. HOWEVER...MORE MOISTURE AND DISTURBANCES MOVING SE FROM UPSTREAM. AT THE SFC...CU FIELD SLOW TO DEVELOP...WITH MOST CU OVER S TIER AND NW ZONES. ISOLD TSTM DEVELOPMENT HAS BEEN CONFINED TO MARION COUNTY AND POINTS S WITH MUCH LESS COVERAGE THAN THU AND WEAKER THUS FAR. THIS EVENING...EXPECT GREATEST TSTM COVERAGE GENERALLY ALONG AND S OF A KSGJ TO KGNV LINE. IN ADDITION...A WK SHORT WAVE IS PROGGED TO MOVE INTO SE GA BY SUNSET...WITH A POSSIBLY TEMPORARY INCREASE IN COVERAGE OVER THAT AREA AS WELL. SAT...MODELS PUSH A RATHER POTENT 500 MB VORT MAX ACROSS GA LATE IN THE DAY. AS A RESULT...SHOULD SEE A WHOLESALE INCREASE IN POPS VS TODAY. DIFFERENCES IN MODELS REVOLVE AROUND RESULTING LOW-LEVEL LOW PRESSURE DEVELOPMENT IN RESPONSE TO THIS FEATURE. GFS STILL INSISTS THAT A 1006 MB LOW WILL DEVELOP ACROSS N OR CENTRAL GA...WITH ETA SHOWING WEAKER LOW DEVELOPMENT FARTHER N. GFS APPEARS TO HAVE A SOME CONVECTIVE FEEDBACK ISSUES...SO WOULD LEAN MORE TOWARD ETA FEATURES. THIS WILL RESULT IN LESS 850 MB WINDS AND LESS SEVERITY OF STORMS. HOWEVER...ACTIVITY WILL BE QUITE STRONG OVER N GA ZONES AND SPC HAS THIS AREA IN A SLIGHT RISK. SUN...MORE SHORTWAVE ENERGY AVAILABLE ROUNDING BASE OF UPPER TROF... BUT TIMING BECOMES MORE DIFFICULT. WILL CONTINUE HIGH CHANCE POPS FOR ENTIRE AREA. .LONG TERM...GFS STILL DEPICTING MID-LEVEL DRYING (ESP OVER N 2/3 OF THE AREA) EARLY NEXT WEEK. ALTHO UPPER TROF DAMPENS BY MID TO LATE WEEK...MOISTURE RETURNS ENUF FOR NEAR CLIMO POPS DURING THIS PERIOD. AS TROF WEAKENS...ABOVE CLIMO TEMPS BY MID TO LATE WEEK. && .MARINE...GRADIENT NOT QUITE AS STRONG OVER THE WATERS TONIGHT SO DO NOT EXPECT AS STRONG OF A NOCTURNAL SURGE. WENT CLOSE TO ETA FOR WIND GRIDS THROUGH THE NEXT SEVERAL DAYS AS GFS APPEARS WAY TO STRONG DUE TO FEEDBACK ISSUES. HOWEVER...MODELS DO AGREE ON OFFSHORE AREAS APPROACHING SCA CONDITIONS BY SATURDAY NIGHT INTO SUNDAY. && .PRELIMINARY POINT TEMPS/POPS... AMG 71 88 71 89 / 10 60 50 50 SSI 75 85 74 86 / 10 50 50 50 JAX 72 88 72 90 / 20 60 50 50 SGJ 74 84 74 86 / 20 60 50 40 GNV 72 88 72 88 / 30 60 50 50 OCF 72 87 72 87 / 30 60 40 40 && .JAX WATCHES/WARNINGS/ADVISORIES... FL...NONE. GA...NONE. && CARROLL/CAMP
Hazardous weather outlook, Jul 16, 11:15 AM EST, 9 hours 9 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE JACKSONVILLE FL 1215 PM EDT FRI JUL 16 2004 FLZ020>025-030>033-035>038-040-GAZ132>136-149>154-162>166-171000- ALACHUA-APPLING-ATKINSON-BACON-BAKER-BRADFORD-BRANTLEY- CAMDEN (COASTAL)-CAMDEN (INLAND)-CHARLTON-CLAY-CLINCH-COFFEE- COLUMBIA-DUVAL-ECHOLS-FLAGLER-GILCHRIST-GLYNN (COASTAL)- GLYNN (INLAND)-HAMILTON-JEFF DAVIS-MARION-NASSAU-PIERCE-PUTNAM- ST JOHNS-SUWANNEE-UNION-WARE-WAYNE- 1215 PM EDT FRI JUL 16 2004 THIS OUTLOOK IS FOR NORTHEAST FLORIDA AND SOUTHEAST GEORGIA. .DAY ONE...THIS AFTERNOON AND TONIGHT... ...ISOLATED STRONG TO SEVERE STORMS POSSIBLE ACROSS NORTHEAST FLORIDA TODAY... SCATTERED THUNDERSTORMS WILL DEVELOP BY MID TO LATE AFTERNOON MAINLY SOUTH OF INTERSTATE 10. STORMS WILL BE MOVING TO THE SOUTHEAST AT AROUND 20 MPH. ISOLATED STRONG TO SEVERE STORMS WILL BE POSSIBLE PRODUCING WIND GUSTS TO 60 MPH...HAIL...FREQUENT LIGHTNING AND LOCALLY HEAVY RAINFALL. HOWEVER...OVERALL COVERAGE WILL BE MUCH LESS THAN ON THURSDAY. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY... ...ISOLATED STRONG TO SEVERE STORMS POSSIBLE ON SATURDAY AND SUNDAY... NUMEROUS SHOWERS AND THUNDERSTORMS WILL DEVELOP ON SATURDAY AND SUNDAY WITH ISOLATED SEVERE STORMS POSSIBLE PRODUCING STRONG GUSTY WINDS AND HAIL. OTHERWISE...NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .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 WWW.SRH.NOAA.GOV/JAX. ARS/SEC
In the hours before
Local storm report, Jul 16, 7:55 PM EST, 29 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE JACKSONVILLE FL
855 PM EDT FRI JUL 16 2004
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION...ST.. ...SOURCE....
..REMARKS..
0730 PM TSTM WND DMG BRANFORD 29.96N 82.93W
07/16/2004 SUWANNEE FL FIRE DEPT/RESCUE
SEVERAL REPORTS OF TREES DOWN NEAR BRANFORD
&&
ENYEDISpecial weather statement, Jul 16, 8:02 PM EST, 22 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 902 PM EDT FRI JUL 16 2004 FLZ033-037-038-170145- FLAGLER FL-PUTNAM FL-ST. JOHNS FL- 902 PM EDT FRI JUL 16 2004 ...A SIGNIFICANT WEATHER ALERT HAS BEEN ISSUED FOR FLAGLER...ST. JOHNS AND EASTERN PUTNAM COUNTIES FOR STRONG THUNDERSTORM WINDS AND HAIL VALID UNTIL 945 PM EDT... AT 902 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A CLUSTER OF STRONG THUNDERSTORMS CENTERED OVER SPUDS...OR ABOUT OVER HASTINGS...MOVING SOUTH AT 15 MPH. THIS CLUSTER OF STRONG THUNDERSTORMS WILL ALSO AFFECT AREAS AROUND SPUDS...ORANGE MILLS... HASTINGS...ELKTON...DUPONT CENTER...ESPANOLA...CRESCENT CITY AND ANDALUSIA THROUGH 945 PM EDT. HAIL UP TO ONE HALF INCH IN DIAMETER...EXCESSIVE 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...OR YOU CAN CALL THE NATIONAL WEATHER SERVICE IN JACKSONVILLE DIRECTLY AT 1-800-499-1594. ENYEDI
Special weather statement, Jul 16, 8:08 PM EST, 16 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 908 PM EDT FRI JUL 16 2004 GAZ151-152-170200- BRANTLEY GA-PIERCE GA- 908 PM EDT FRI JUL 16 2004 ...A SIGNIFICANT WEATHER ALERT HAS BEEN ISSUED FOR BRANTLEY AND PIERCE COUNTIES FOR STRONG THUNDERSTORM WINDS AND HAIL VALID UNTIL 1000 PM EDT... AT 908 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM CENTERED 7 MILES WEST OF RAYBON...OR ABOUT 7 MILES NORTH OF HOBOKEN...MOVING EAST AT 20 MPH. THIS STRONG THUNDERSTORM WILL ALSO AFFECT AREAS AROUND RAYBON...HORTENSE AND ATKINSON THROUGH 1000 PM EDT. HAIL UP TO ONE HALF 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...OR YOU CAN CALL THE NATIONAL WEATHER SERVICE IN JACKSONVILLE DIRECTLY AT 1-800-499-1594. ZAPPE
Special weather statement, Jul 16, 8:13 PM EST, 11 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 913 PM EDT FRI JUL 16 2004 GAZ134-170200- BACON GA- 913 PM EDT FRI JUL 16 2004 ...A SIGNIFICANT WEATHER ALERT HAS BEEN ISSUED FOR BACON COUNTY FOR STRONG THUNDERSTORM WINDS VALID UNTIL 1000 PM EDT... AT 913 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A CLUSTER OF STRONG THUNDERSTORMS CENTERED 12 MILES SOUTH OF ALMA... MOVING NORTHEAST AT 10 MPH. THIS CLUSTER OF STRONG THUNDERSTORMS WILL ALSO AFFECT AREAS AROUND ALMA AND NEW LACY THROUGH 1000 PM EDT. HAIL UP TO ONE HALF INCH IN DIAMETER...EXCESSIVE 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...OR YOU CAN CALL THE NATIONAL WEATHER SERVICE IN JACKSONVILLE DIRECTLY AT 1-800-499-1594. ENYEDI
Special weather statement, Jul 16, 8:14 PM EST, 10 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 914 PM EDT FRI JUL 16 2004 FLZ025-170200- DUVAL FL- 914 PM EDT FRI JUL 16 2004 ...A SIGNIFICANT WEATHER ALERT HAS BEEN ISSUED FOR NORTHERN DUVAL COUNTY FOR STRONG THUNDERSTORM WINDS AND HAIL VALID UNTIL 1000 PM EDT... AT 914 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A CLUSTER OF STRONG THUNDERSTORMS CENTERED ALONG A LINE EXTENDING FROM 6 MILES NORTHWEST OF JACKSONVILLE INTERNATIONAL TO 16 MILES SOUTHWEST OF JACKSONVILLE INTERNATIONAL...OR ALONG A LINE EXTENDING FROM 4 MILES SOUTHEAST OF CALLAHAN TO 14 MILES SOUTHWEST OF CALLAHAN... MOVING EAST AT 20 MPH. THIS CLUSTER OF STRONG THUNDERSTORMS WILL ALSO AFFECT AREAS AROUND JACKSONVILLE INTERNATIONAL AND OCEANWAY THROUGH 1000 PM EDT. HAIL UP TO ONE HALF 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...OR YOU CAN CALL THE NATIONAL WEATHER SERVICE IN JACKSONVILLE DIRECTLY AT 1-800-499-1594. ZAPPE
Special weather statement, Jul 16, 8:18 PM EST, 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE JACKSONVILLE FL 918 PM EDT FRI JUL 16 2004 GAZ153-154-165-166-170200- COASTAL CAMDEN GA-COASTAL GLYNN GA-INLAND CAMDEN GA-INLAND GLYNN GA- 918 PM EDT FRI JUL 16 2004 ...A SIGNIFICANT WEATHER ALERT HAS BEEN ISSUED FOR CAMDEN AND GLYNN COUNTIES FOR STRONG THUNDERSTORM WINDS AND HAIL VALID UNTIL 1000 PM EDT... AT 918 PM EDT NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STRONG THUNDERSTORMS CENTERED 2 MILES NORTHWEST OF HARRIETTS BLUFF...OR ABOUT 8 MILES NORTHEAST OF KINGSLAND...MOVING EAST NORTHEAST AT 15 MPH. THIS CLUSTER OF STRONG THUNDERSTORMS WILL ALSO AFFECT AREAS AROUND WOODBINE...KINGSLAND...HARRIETTS BLUFF...COLESBURG...KINGS BAY BASE...DOVER BLUFF...DUNGENESS...CUMBERLAND ISLAND AND BRUNSWICK THROUGH 1000 PM EDT. HAIL UP TO ONE HALF INCH IN DIAMETER...EXCESSIVE 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...OR YOU CAN CALL THE NATIONAL WEATHER SERVICE IN JACKSONVILLE DIRECTLY AT 1-800-499-1594. ENYEDI
The radar
The national radar mosaic for the moment the first event began.
Event by event
1 thunderstorm wind. Local standard time, as filed.
What these are
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Flash Flooding and Flood in Indiana, July 16 to 17, 2004
- Flash Flooding and Hail in Colorado, July 16, 2004
- Tornado and Flash Flooding in Missouri, July 16, 2004
- Flash Flood in Utah, July 16, 2004
- Tornado and Hail in Wisconsin, July 16, 2004
- Flash Flood and Hail in Mississippi, July 16, 2004
- Hail and Damaging Winds in Iowa, July 16, 2004
- High Surf in Hawaii, July 16 to 17, 2004
- Hail and Damaging Winds in Illinois, July 16, 2004
- Hail and Damaging Wind in New Mexico, July 16, 2004
- Flash Flooding in Illinois, July 16 to 17, 2004
- Hail and Damaging Wind in Florida, July 16, 2004
More
Every storm in Florida in 2004Every state in 2004This day in weather historyWarnings in Florida, July 2004
Sources
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: 5405917.