Numerous afternoon convection produced strong storms and an isolated severe thunderstorm with hail near Ft. Drum.
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 MLB wrote it up.
Numerous afternoon convection produced strong storms and an isolated severe thunderstorm with hail near Ft. Drum.
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 Melbourne, FL wrote its last area forecast discussion before the first event at Jul 10, 1:35 PM EST, 4 hours 43 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MELBOURNE FL 235 PM EDT FRI JUL 10 2009 .DISCUSSION... ...COVERAGE OF AFTERNOON STORMS GRADUALLY DIMINISHING OVER WEEKEND.. TONIGHT...AFTERNOON STORMS AND SHOWERS EXPECTED TO LINGER THROUGH SUNSET THEN DIMINISH AS DAYTIME HEATING INFLUENCE IS LOST. FRONTAL TROUGHING/BOUNDARY MOVING DOWN THE PENINSULA CONTINUES TO DISSIPATE AS UPPER TROUGH AXIS MOVES OVERHEAD THEN OFF TO THE SOUTHEAST. WATER VAPOR SATELLITE LOOP ALREADY SHOWING DRIER MID/UPPER LEVEL AIR MASS FILTERING IN FROM THE NORTHWEST AND OVER THE STATE OVERNIGHT AND SATURDAY. SCATTERED SHOWERS/STORMS OVERLAND WILL WIND DOWN DURING THE EVENING. SATURDAY...WEAK SURFACE TROUGHING FORECAST TO LIE OVER CENTRAL FLORIDA SATURDAY WILL ACT AS A FOCUS FOR ISOLATED SHOWERS MOVING WEST TO EAST. EXPECT AFTERNOON SHOWERS AND STORMS TO DEVELOP AND PUSH TO THE EAST AS THE STEERING FLOW WILL HAVE NOT YET SHIFTED AROUND TO THE NORTHEAST AND EAST. LIKELY POP/60 FROM CAPE CANAVERAL AND SOUTH BREVARD/OSCEOLA SOUTH AS STRONGER WESTERLY STEERING FLOW WILL TEND TO PUSH STORMS BACK TO THE COAST. STORMS COULD BECOME GOOD LIGHTNING/GUSTY WIND PRODUCERS CAPE CANAVERAL SOUTH AS THEY BUMP AGAINST THE AFTERNOON SEA BREEZE. (PREVIOUS DISCUSSION) .SUN-MON... CTRL CONUS RIDGE TRIES TO BUILD EWD AND LINK UP WITH THE WRN EXTENSION OF THE ATLC RIDGE...BUT AS WEVE SEEN SO OFTEN THIS SUMMER THUS FAR...IT NEVER REALLY COMPLETES THE JOB. INSTEAD...ECFL REMAINS UNDER A SORT OF WEAKNESS AT H50 (591-592DM) BETWEEN THE RIDGES. THIS WILL KEEP A WEAK SFC PRES PATTERN IN PLACE. AS MOISTURE ASCD WITH WEAKENING FRONTAL TROUGH DIMINISHES...POPS WILL RETURN TO NR CLIMO (30-40). BY LATE MON/MON NGT...THE GFS SHOWS SOME SHORT WAVE ENERGY TRYING TO DRIVE A FRONTAL TROUGH CLOSE ENOUGH TO NORTH FL...BUT WOULD PREFER TO WAIT BEFORE NUDGING UP POPS ANY. .TUE-THU... PERSISTENT ERN CONUS TROUGHING WILL MAINTAIN THE SUBTLE WEAKNESS IN THE H50 HGT FIELDS OVER FL. GFS GUIDANCE SHOWS SLOWLY INCREASING MOISTURE IN PERSISTENT LIGHT SRLY FLOW PATTERN WITH SFC RIDGE AXIS IN CLOSE PROXIMITY. WILL SLOWLY TREND POPS UP FROM 30 TO 40 FROM MID TO LATE WEEK. ALL IN ALL...COVERAGE AND STORM STRENGTH DURG DAYS 2-7 LOOK LIKE PRETTY TYPICAL FOR EARLY-MID JULY. && .AVIATION...SCATTERED MVFR/IFR LIGHTNING STORMS WITH GUSTS TO 45KT AS DAYTIME HEATING AND PREVAILING WESTERLY FLOW PUSHES STORMS AGAINST THE SEA BREEZE AS IT TRIES TO MOVE INLAND. STORMS/SHOWERS EXPECTED TO WIND DOWN MID EVENING WITH MID/HIGH LEVEL DEBRIS CLOUDS THROUGH 11/06Z. VFR THROUGH 16Z THEN MVFR AS DAYTIME HEATING STARTS HELPING TO FORM CU. && .MARINE...TONIGHT...GREATEST CONCERN THROUGH THE EVENING WILL BE STORMS AFFECTING THE COAST. MANY STORMS WILL CONTAIN G35KT...FREQUENT LIGHTNING AND REDUCED VISIBILITY IN STORMS OVER THE ICW AND NEARSHORE WATERS CAPE CANAVERAL SOUTH. SAT-WED...WEAK FRONTAL TROUGH JUST TO OUR NORTH WILL DISSIPATE OVER THE WEEKEND THEN ANOTHER SURFACE TROUGH WILL MOVE ACROSS THE SOUTHEAST STATES EARLY NEXT WEEK. THIS SCENARIO WILL KEEP WINDS/SEAS 5-10 KT/2-3 FEET OVER THE WEEKEND. SOUTHWEST FLOW WILL BECOME MORE ESTABLISHED EARLY NEXT WEEK AND MAY REACH TO AROUND 15 KNOTS IN THE NORTH. BOATERS WILL NEED TO KEEP A WATCH TO THE WESTERN SKIES VERO BEACH SOUTH SATURDAY AFTERNOON AS STEERING FLOW WILL TEND TO PUSH STORMS EASTWARD. ONCE THE SEA BREEZE CIRCULATION SETS UP SEBASTIAN INLET NORTH STORMS SHOULD MOVE SOUTH ALONG THE SEA BREEZE AS IT MOVES ACROSS THE BARRIER ISLAND...THE ICW AND THE MAINLAND DURING THE AFTERNOON. THEREAFTER...WEAKENING STEERING WINDS WILL LEAD TO LESS CHANCES FOR AFTERNOON STORMS. && .PRELIMINARY POINT TEMPS/POPS... DAB 71 86 71 89 / 40 50 20 20 MCO 71 90 72 92 / 30 50 20 20 MLB 71 87 71 88 / 40 60 20 30 VRB 70 89 71 89 / 40 60 20 30 && .MLB WATCHES/WARNINGS/ADVISORIES... FL...NONE. AM...NONE. && SHORT TERM...WIMMER LONG TERM....LASCODY AVIATION...99
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE MELBOURNE FL 617 AM EDT FRI JUL 10 2009 AMZ550-552-555-570-572-575-FLZ041-044>047-053-054-058-059-064-141- 144-147-102230- COASTAL WATERS FROM FLAGLER BEACH TO VOLUSIA BREVARD COUNTY LINE OUT 20 NM- COASTAL WATERS FROM VOLUSIA BREVARD COUNTY LINE TO SEBASTIAN INLET OUT 20 NM- COASTAL WATERS FROM SEBASTIAN INLET TO JUPITER INLET OUT 20 NM- WATERS FROM FLAGLER BEACH TO VOLUSIA BREVARD COUNTY LINE 20 TO 60 NM OFFSHORE- WATERS FROM VOLUSIA BREVARD COUNTY LINE TO SEBASTIAN INLET 20 TO 60 NM OFFSHORE- WATERS FROM SEBASTIAN INLET TO JUPITER INLET 20 TO 60 NM OFFSHORE- INLAND VOLUSIA-NORTHERN LAKE-ORANGE-SEMINOLE-SOUTHERN BREVARD- OSCEOLA-INDIAN RIVER-OKEECHOBEE-ST. LUCIE-MARTIN-COASTAL VOLUSIA- SOUTHERN LAKE-NORTHERN BREVARD- 617 AM EDT FRI JUL 10 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL FLORIDA. .DAY ONE...TODAY AND TONIGHT. ...THUNDERSTORM IMPACT... AN UPPER LEVEL DISTURBANCE...COMBINED WITH A POCKET OF COLD TEMPERATURES ALOFT AND THE DEVELOPMENT OF AN ATLANTIC SEA BREEZE THIS AFTERNOON WILL ALLOW NUMEROUS LIGHTNING STORMS TO DEVELOP. SIMILAR TO YESTERDAY...SOME STORMS WILL FORM DURING THE MORNING...AND SPREAD FROM WEST TO EAST AT 10 TO 15 MPH FROM THE GULF COAST TO THE INTERIOR PENINSULA. STORM COVERAGE WILL GRADUALLY INCREASE AS TEMPERATURES WARM THROUGH EARLY AFTERNOON. THE GREATEST COVERAGE IS EXPECTED DURING THE MID TO LATE AFTERNOON AS EASTWARD MOVING STORMS INTERACT WITH THE SEA BREEZE OVER THE COASTAL COUNTIES. MANY OF THE STORMS TODAY MAY CONTAIN GUSTY WINDS OF 35 TO 45 MPH...SMALL HAIL AND OCCASIONAL LIGHTNING. A FEW STORMS MAY INCREASE TO SEVERE LEVELS AND PRODUCE DAMAGING WINDS OF AROUND 60 MPH AND PENNY TO QUARTER SIZE HAIL. DURING THIS TIME OF YEAR...LIGHTNING USUALLY POSES THE GREATEST WEATHER THREAT TO YOUR SAFETY. THE EARLY AND LATE STAGES OF THUNDERSTORMS OFTEN ARE THE MOST DANGEROUS TIME TO BE OUTDOORS...AS MANY PEOPLE ARE CAUGHT OFF GUARD BY THE FIRST OR FINAL STRIKES TO THE GROUND. MOVE INDOORS WELL IN ADVANCE OF APPROACHING STORMS AND REMAIN INSIDE UNTIL 30 MINUTES AFTER THE LAST THUNDER IS HEARD. ...FLOOD IMPACT... RAINFALL RATES NEAR TWO INCHES PER HOUR WILL OCCUR WITH MANY OF THE STORMS. TEMPORARY LOCAL FLOODING MAY DEVELOP IN AREAS WHICH EXPERIENCE SEVERAL ROUNDS OF STORMS...ESPECIALLY NEAR THE EAST COAST THIS AFTERNOON. NEVER DRIVE THROUGH WATER COVERING THE ROADWAY. ...RIP CURRENT IMPACT... A LONG PERIOD EASTERLY SWELL AND HIGH ASTRONOMICAL TIDES WILL CONTRIBUTE TO AN ELEVATED RIP CURRENT RISK AT AREA BEACHES AGAIN TODAY. ALWAYS SWIM WITHIN SIGHT OF A LIFE GUARD AND DO NOT SWIM ALONE. ...MARINE THUNDERSTORM GUST IMPACT... SCATTERED TO NUMEROUS STORMS WILL SPREAD EAST AT 10 TO 15 KNOTS AND MOVE ACROSS THE INTRACOASTAL AND COASTAL WATERS TODAY. STORMS WILL ALSO IMPACT THE INLAND LAKES. THE SEA BREEZE FORMATION NEAR THE EAST COAST WILL HELP STRENGTHEN STORMS OVER THE INTRACOASTAL AND NEAR SHORE ATLANTIC WATERS. GUSTY WINDS OVER 35 KNOTS...CLOUD TO WATER LIGHTNING...AND VISIBILITY NEAR ZERO IN HEAVY RAIN ARE LIKELY WILL MANY OF THE STORMS TODAY. WATCH FOR DARKENING SKIES AND LIGHTNING TO THE WEST AND SEEK SAFE HARBOR WELL BEFORE STORMS APPROACH THE COAST. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY. THE SURFACE RIDGE WILL BEGIN TO SHIFT NORTHWARD OVER CENTRAL FLORIDA THIS WEEKEND...SIGNALING A GRADUAL RETURN TO TYPICAL SEA BREEZE GENERATED LIGHTNING STORMS EACH AFTERNOON RATHER THAN THE MORE EXTENSIVE STORMS OF THE PAST WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTERS ARE REQUESTED TO MONITOR THE WEATHER AND SELF ACTIVATE IF NEEDED. SPRATT
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MELBOURNE FL 510 PM EDT FRI JUL 10 2009 FLZ041-044-141-102215- COASTAL VOLUSIA COUNTY-INLAND VOLUSIA COUNTY-NORTHERN LAKE COUNTY- 510 PM EDT FRI JUL 10 2009 ...STRONG THUNDERSTORMS AFFECTING NORTHERN VOLUSIA COUNTY... AT 509 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF STRONG STORMS FROM 13 MILES NORTHWEST OF DAYTONA INTERNATIONAL SPEEDWAY TO LAKE GEORGE...MOVING SOUTHEAST AT 15 MPH. THE PRIMARY THREAT WILL BE CLOUD TO GROUND LIGHTNING STRIKES AND GUSTY WINDS OF 45 TO 55 MPH...WHICH CAN CAUSE UNSECURED OBJECTS TO BLOW AROUND...SNAP TREE LIMBS OR CAUSE POWER OUTAGES. HEAVY RAINFALL WILL TEMPORARILY REDUCE VISIBILITY. SEEK SHELTER INDOORS UNTIL THE STORM PASSES. A BRIEF PERIOD OF SMALL HAIL...PEA TO DIME SIZE...WILL ALSO BE POSSIBLE IN LOCALIZED AREAS. STATE LAW REQUIRES HEADLIGHTS TO BE TURNED ON WHEN WINDSHIELD WIPERS ARE IN USE.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MELBOURNE FL 616 PM EDT FRI JUL 10 2009 FLZ058-102315- OKEECHOBEE- 616 PM EDT FRI JUL 10 2009 ...STRONG THUNDERSTORMS EXPECTED TO DEVELOP OVER OKEECHOBEE COUNTY... AT 611 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED TWO WELL DEFINED OUTFLOW BOUNDARIES MERGING OVER NORTH OKEECHOBEE COUNTY NEAR OVIEDO AND LAKE JESSUP. THE MERGER WILL OCCUR BETWEEN KISSIMMEE PRAIRIE PRESERVE AND FORT DRUM THROUGH 715 PM. THE PRIMARY THREAT FROM ANY STORMS THAT DEVELOP WILL BE FREQUENT CLOUD-TO-GROUND LIGHTNING STRIKES AND GUSTY WINDS OF 45 TO 55 MPH... WHICH CAN CAUSE UNSECURED OBJECTS TO BLOW AROUND...SNAP TREE LIMBS OR CAUSE POWER OUTAGES. HEAVY RAINFALL WILL TEMPORARILY REDUCE VISIBILITY. SEEK SHELTER INDOORS UNTIL THE STORMS PASS. BRAGAW
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
621 PM EDT FRI JUL 10 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0240 PM TSTM WND GST 4 N HAULOVER CANAL 28.80N 80.74W
07/10/2009 M39 MPH VOLUSIA FL OTHER FEDERAL
34 KNOTS FROM USAF WIND TOWER
&&
MRTPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
645 PM EDT FRI JUL 10 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0250 PM TSTM WND GST 4 N HAULOVER CANAL 28.80N 80.74W
07/10/2009 M44 MPH VOLUSIA FL OTHER FEDERAL
USAF WIND TOWER. 38 KNOTS AT 54 FEET ELEVATION.
&&
MRTSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MELBOURNE FL 653 PM EDT FRI JUL 10 2009 FLZ059-064-102345- MARTIN-ST. LUCIE- 653 PM EDT FRI JUL 10 2009 ...STRONG THUNDERSTORMS AFFECTING ST. LUCIE COUNTY...MAY DEVELOP SOUTHWARD INTO MARTIN COUNTY... AT 651 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG STORM OVER SAINT LUCIE WEST...MOVING NORTHEAST AT 10 MPH. LOCATIONS IN THE PATH OF THIS STRONG STORM INCLUDE PORT SAINT LUCIE AND FORT PIERCE. ADDITIONAL STRONG STORMS ARE EXPECTED TO DEVELOP SOUTHWARD INTO MARTIN COUNTY. THE PRIMARY THREAT WILL BE CLOUD TO GROUND LIGHTNING STRIKES AND GUSTY WINDS OF 45 TO 55 MPH...WHICH CAN CAUSE UNSECURED OBJECTS TO BLOW AROUND...SNAP TREE LIMBS OR CAUSE POWER OUTAGES. HEAVY RAINFALL WILL TEMPORARILY REDUCE VISIBILITY. SEEK SHELTER INDOORS UNTIL THE STORM PASSES. A BRIEF PERIOD OF SMALL HAIL...PEA TO DIME SIZE...WILL ALSO BE POSSIBLE IN LOCALIZED AREAS. TORRENTIAL RAINFALL CAN BE EXPECTED...CAUSING TEMPORARY PONDING ON SOME ROADS AND MINOR FLOODING OF POOR DRAINAGE AREAS. MOTORISTS SHOULD SLOW DOWN IN HEAVY RAINFALL TO REDUCE THE RISK OF HYDROPLANING AND LEAVE SAFE DISTANCE BETWEEN OTHER VEHICLES.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MELBOURNE FL
659 PM EDT FRI JUL 10 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0658 PM HAIL 4 WNW PORT SAINT LUCIE 27.29N 80.41W
07/10/2009 M0.50 INCH ST. LUCIE FL TRAINED SPOTTER
A LARGE AMOUNT OF SMALL HAIL OCCURRING
&&
MRTThe Melbourne radar (KMLB), 63 km away, was scanning. The volume nearest the first event began at 23:16 UTC.
1 hail. Local standard time, as filed.
An isolated storm increased to severe intensity and produced penny size hail. Gusty winds also downed several large tree limbs.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2009Every state in 2009This day in weather historyWarnings in Florida, July 2009
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: 172393.