A thunderstorm which produced gale force wind gusts across Key West Harbor produced isolated minor wind damage along the north shore of Key West.
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The episode as NWS KEY wrote it up.
A thunderstorm which produced gale force wind gusts across Key West Harbor produced isolated minor wind damage along the north shore of Key West.
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 Key West, FL wrote its last area forecast discussion before the first event at Aug 5, 1:55 PM EST, 2 hours 20 minutes earlier.
AREA FORECAST DISCUSSION FOR THE FLORIDA KEYS NATIONAL WEATHER SERVICE KEY WEST FL 255 PM EDT WED AUG 5 2009 .DISCUSSION... A LARGE AREA OF SHOWERS AND THUNDERSTORMS BLOSSOMED OUT IN THE STRAITS EARLIER THIS MORNING...AND JUST AS QUICKLY WANED. POCKETS OF SHOWERS WITH EMBEDDED THUNDERSTORMS HAVE SINCE FAVORED THE GULF SIDE OF THE ISLAND CHAIN...AND THE GULF WATERS WELL OFFSHORE FROM MAINLAND MONROE COUNTY. RECENTLY...MORE ISOLATED SHOWERS HAVE REGENERATED IN THE ATLANTIC WATERS ADJACENT TO THE MIDDLE AND UPPER KEYS. SURFACE ANALYSIS SHOWS A WEAK WAVE HAS SHIFTED TO THE WEST OF THE SERVICE AREA. WINDS ARE GENTLE TO MODERATE OUT OF THE EAST/SOUTHEAST ACROSS THE SERVICE AREA...AND VISIBLE SATELLITE IMAGES SHOW PARTLY CLOUDY SKIES TO THE SOUTH AND MORE CONGESTED POCKET TO THE NORTH AND NORTHWEST OF THE KEYS. THE LATEST RUNS OF ALL MODELS HAVE NOT AGREED WELL WITH PREVIOUS RUNS AS FAR AS THE SHORT RANGE IMPACTS FOR THE KEYS AND SURROUNDING WATERS ARE CONCERNED. PREVIOUSLY...A SIGNIFICANT POCKET OF MOISTURE WAS EXPECTED TO RIDE A WAVE THROUGH THE IMMEDIATE AREA FROM LATE THIS EVENING THROUGH THE FIRST HALF OF THURSDAY. LATEST MODELS ALL ARE SHEARING OUT THE HIGHER MOISTURE FIELDS...WHICH AGREES RATHER NICELY WITH THE LATEST CIMSS PWAT DEPICTIONS. AND...THE WAVE CURRENTLY IN THE N/CENTRAL PORTION OF THE CARIBBEAN LOSES MUCH OF ITS NORTHERN INFLUENCE AS IT PUSHES WESTWARD OVERNIGHT. ALTHOUGH WE REMAIN RELATIVELY MOIST...ALL SHORT RANGE NUMERICAL MOS GUIDANCE HAS DROPPED OFF POPS TONIGHT. THERE WILL PROBABLY BE A LOW LEVEL WIND SPEED SURGE TO CONTEND WITH FROM THE EAST TONIGHT...SO WILL NOT DROP OFF OUR POPS SIGNIFICANTLY FOR THE FIRST PERIOD. WILL MAINTAIN A 40 POP TONIGHT AND THEN TAPER THAT DOWN TOMORROW AS DRIER AIR BEGINS TO FILTER IN AND WINDS SETTLE BACK DOWN FROM THE EXPECTED OVERNIGHT SURGE. THESE UPDATED GRIDDED POPS ARE MORE IN LINE WITH THE LATEST GFS MOS NUMBERS. THE NAM ON THE OTHER HAND IS SIGNIFICANTLY CUTTING BACK ITS NUMBERS TONIGHT AND THEN BRINGING ACROSS LIKELY NUMBERS AGAIN BY TOMORROW. IT IS HARD TO ACCEPT THESE NUMBERS AT THIS TIME SINCE IT IS NOT INITIALIZING THE IMMEDIATE AREA VERY WELL WHEN COMPARED TO ANALYSIS. WILL CUT OUR POPS BACK TO SLIGHT CHANCE FROM THURSDAY NIGHT THROUGH FRIDAY NIGHT AS MID TO UPPER LEVEL HEIGHTS RISE JUST TO OUR NORTH...AND A POCKET OF DRIER AIR GLIDES IN ON WEAKENING AND DEEP E/SE FLOW THROUGH THE MIDDLE LEVELS OF THE TROPOSPHERE. ANOTHER WEAK WAVE IS SHOWN BY THE GFS TO MOVE THROUGH OUR AREA ON SATURDAY WITH PWATS ANYWHERE BETWEEN 1.9 TO 2.1 INCHES TRAILING IT ALL THE WAY THROUGH SUNDAY. SINCE THIS HAS BEEN SHOWN OVER THE LAST FEW RUNS...WILL NOT DROP THE 30 POPS. BUT AS SIGNIFICANTLY DRIER AIR IS EXPECTED IN ITS WAKE...WILL CUT BACK THE POPS FOR EARLY NEXT WEEK DOWN TO A SLIGHT CHANCE ALL AREA. WILL HOLD ON TO THOSE NUMBERS THROUGH THE DURATION OF THE FORECAST EVEN THOUGH THERE MAY BE SOME LOW AMPLITUDE UNDULATIONS IN THE LOWER TO MID LEVEL STEERING FLOW AND MINOR PEAKS IN LULLS IN COLUMN MOISTURE. && .MARINE... BOATERS CAN EXPECT AN EASTERLY WIND SURGE THROUGH THE OVERNIGHT PERIOD WHICH SHOULD SUPPORT SCATTERED SHOWERS AND THUNDERSTORMS ACROSS ALL WATERS. EXPECT WINDS TO SETTLE INTO A 10 TO 15 KNOT RANGE ON THURSDAY ACROSS THE OPEN ATLANTIC WATERS OUT OF THE EAST/SOUTHEAST...AND SLIGHTLY LESS OTHER WATERS. ANOTHER WIND SURGE IS LIKELY TO FOLLOW THE NEXT WAVE LATE SATURDAY/EARLY SUNDAY...BUT NO CAUTIONARY HEADLINES ARE EXPECTED DURING ANY PORTION OF THE MARINE FORECAST. && .AVIATION... RELATIVELY WET PATTERN WILL REMAIN IN PLACE ACROSS THE KEYS THIS EVENING AND OVERNIGHT. THERE WILL BE A CHANCE OF PASSING SHOWERS AND THUNDERSTORMS DELIVERING BRIEF MVFR/IFR CONDITIONS TO THE ISLAND TERMINALS. FOR NOW WILL EXPRESS THIS POSSIBILITY WITH VICINITY SHOWERS. SURFACE WINDS WILL START OUT LIGHT OUT OF THE SOUTHEAST...AND ARE EXPECTED TO PICK UP TO AROUND 10 KNOTS AND GUSTY LATE THIS EVENING. && .PRELIMINARY POINT TEMPS/POPS... KEY WEST 81 90 81 91 / 40 30 20 20 MARATHON 81 91 81 92 / 40 30 20 20 && .KEY WATCHES/WARNINGS/ADVISORIES... FL...NONE. GM...NONE. && PUBLIC/MARINE.........04 AVIATION/NOWCASTS.....11 DATA COLLECTION.......PARKE VISIT US ON THE WEB AT WWW.WEATHER.GOV/KEYWEST
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE KEY WEST FL 557 AM EDT WED AUG 5 2009 FLZ076>078-GMZ031>033-052>054-072>075-061000- MONROE UPPER KEYS-MONROE MIDDLE KEYS-MONROE LOWER KEYS- FLORIDA BAY-GULF SIDE OF THE LOWER KEYS OUT 20 NM- GULF WATERS FROM EAST CAPE SABLE TO CHOKOLOSKEE 20 TO 60 NM OUT- OCEAN REEF TO CRAIG KEY OUT 20 NM- CRAIG KEY TO THE WEST END OF THE 7 MILE BRIDGE OUT 20 NM- WEST END OF THE 7 MILE BRIDGE TO KEY WEST OUT 20 NM- OCEAN REEF TO CRAIG KEY 20 TO 60 NM OUT- CRAIG KEY TO THE WEST END OF THE 7 MILE BRIDGE 20 TO 60 NM OUT- WEST END OF THE 7 MILE BRIDGE TO KEY WEST 20 TO 60 NM OUT- KEY WEST TO 20 NM WEST OF DRY TORTUGAS OUT 60 NM- 557 AM EDT WED AUG 5 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE FLORIDA KEYS AND ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT SCATTERED FAST-MOVING SHOWERS AND THUNDERSTORMS ARE EXPECTED TODAY AND TONIGHT. THE PRIMARY HAZARDS WILL BE LOCALLY STRONG AND GUSTY WINDS IN EXCESS OF 30 KNOTS...ALONG WITH CLOUD TO SURFACE LIGHTNING STRIKES FROM THUNDERSTORMS. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SCATTERED THUNDERSTORMS ARE EXPECTED THROUGH THE PERIOD. THE PRIMARY HAZARDS WILL BE LOCALLY STRONG AND GUSTY WINDS IN EXCESS OF 30 KNOTS...AND CLOUD TO SURFACE LIGHTNING STRIKES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED.
The Key West radar (KBYX), 4 km away, was scanning. The volume nearest the first event began at 21:15 UTC.
1 thunderstorm wind. Local standard time, as filed.
Tree limbs were down on a residential street in the Key Haven subdivision on Stock Island.
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, August 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: 195655.