Heavy rainfall in the two and a half to three inch range produced local flooding of the Overseas Highway in the Rock Harbor vicinity.
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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 KEY wrote it up.
Heavy rainfall in the two and a half to three inch range produced local flooding of the Overseas Highway in the Rock Harbor vicinity.
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 Jul 31, 1:48 PM EST, 42 minutes earlier.
Area Forecast Discussion National Weather Service Key West FL 248 PM EDT Mon Jul 31 2017 .DISCUSSION... .CURRENTLY... Skies are overcast while showers and thunderstorms are proliferating across our entire county warning area. Due to the cloud cover and rainfall, temperatures range from the mid 70s to mid 80s elsewhere. Surface wise, a stationary frontal boundary lies across central Florida and the adjacent Atlantic and Gulf waters. Away from showers and lightning storms, winds are mainly southwest near 15 knots. && .SHORT TERM...(Tonight through Thursday night) An Unusually deep trough over the eastern United States and down the Florida peninsula will lift northward by Tuesday afternoon, with the subtropical ridge moving into the Straits of Florida and then our entire region Wednesday and Wednesday night. Thereafter, the ridge will continue to track northward into south Florida. With that said, low level mass confluence, an abundance of moisture and modest large scale ascent will prompt definite pops to be inserted for the rest of today and this evening, with high chance pops after midnight and into Tuesday. Beyond that, large scale and strengthening subsidence will result in much drier air to filter into our area from the south. Hence, low chance pops will be trimmed to slight chance by mid week. Temperatures will return to near or slightly above normal beginning Wednesday with daytime highs in the lower 90s and overnight lows in the lower to mid 80s. && .LONG TERM...(Friday through Monday) The aforementioned deep subtropical ridge over south Florida and the adjacent waters will continue to track northward and spread across the entire Sunshine State and the adjacent gulf and Atlantic waters. With the repositioning of the ridge, our area will lie on the southern periphery which will allow occasional pockets of higher moisture within an intensifying southeasterly flow. But until timing and confidence increases, will retain low chance pops with slightly above average temperatures through the period. && .MARINE... Away from showers, thunderstorms and outflow boundaries, mostly southwest winds will average near 15 knots before turning south and decreasing on Tuesday through Wednesday. Thereafter, winds will become moderate to occasionally fresh from the southeast when an Exercise Caution headline may be required for at least the Straits of Florida. && .AVIATION... A decaying boundary is lingering north of the Island Chain with wide spread showers, and embedded thunderstorms. We have a TEMPO group in for both the Key West and Marathon terminals until 31/22z then a persistence group through 01/04z with reduced visibilities and / or ceilings due to showers and thunderstorms near the terminals. The boundary was reinvigorated by the tropical storm Emily moving across Central Florida. Expecting a gradual decrease in activity after midnight. Winds will remain out of the southwest to west at 10 to 15 knots with gusts up to 20 knots. This should not be a issue for cross winds. && .CLIMATE... In Keys Weather History, in 1901 and 1929, Key West experienced its coldest July ever with an average temperature of 81.4F in each occurrence. Temperature records for Key West date back to 1872. && .PRELIMINARY POINT TEMPS/POPS... Key West 78 89 82 90 / 90 50 30 30 Marathon 77 92 80 93 / 90 50 30 30 && .KEY WATCHES/WARNINGS/ADVISORIES... FL...None. GM...None. && Public/Marine/Fire...APA Aviation/Nowcasts....BWC Data Collection......KN Visit us on the web at weather.gov/key Follow us on Facebook and Twitter at: www.facebook.com/nwskeywest www.twitter.com/nwskeywest
Hazardous Weather Outlook National Weather Service Key West FL 504 AM EDT Mon Jul 31 2017 FLZ076>078-GMZ031>035-042>044-052>055-072>075-010915- Monroe Upper Keys-Monroe Middle Keys-Monroe Lower Keys- Florida Bay including Barnes Sound, Blackwater Sound, and Buttonwood Sound- Bayside and Gulf side from Craig Key to west end of Seven Mile Bridge- Gulf waters from East Cape Sable to Chokoloskee 20 to 60 NM out and beyond 5 fathoms- Gulf of Mexico including Dry Tortugas and Rebecca Shoal Channel- Gulf of Mexico from west end of Seven Mile Bridge to Halfmoon Shoal out to 5 Fathoms- Hawk Channel from Ocean Reef to Craig Key out to the reef- Hawk Channel from Craig Key to west end of Seven Mile Bridge out to the reef- Hawk Channel from west end of Seven Mile Bridge to Halfmoon Shoal out to the reef- Straits of Florida from Ocean Reef to Craig Key out 20 NM- Straits of Florida from Craig Key to west end of Seven Mile Bridge out 20 NM- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal out 20 NM- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas out 20 NM- Straits of Florida from Ocean Reef to Craig Key 20 to 60 NM out- Straits of Florida from Craig Key to west end of Seven Mile Bridge 20 to 60 NM out- Straits of Florida from west end of Seven Mile Bridge to south of Halfmoon Shoal 20 to 60 NM out- Straits of Florida from Halfmoon Shoal to 20 NM west of Dry Tortugas 20 to 60 NM out- 504 AM EDT Mon Jul 31 2017 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE FLORIDA KEYS AND ADJACENT COASTAL WATERS. .DAY ONE...TODAY AND TONIGHT Numerous showers and scattered will impact the Florida Keys, as well as nearshore and offshore waters surrounding the island chain today. Scattered showers and storms will also impact the area tonight. The primary thunderstorm hazards are cloud to surface lightning strikes and locally heavy rainfall. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY Isolated to scattered thunderstorms are possible along the Florida Keys, as well as over nearshore and offshore waters adjacent to the island chain Tuesday through Sunday. The primary thunderstorm hazard will be cloud to surface lightning strikes. .SPOTTER INFORMATION STATEMENT... Spotter activation is not anticipated. MCLOVIN
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
125 PM EDT MON JUL 31 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0104 PM MARINE TSTM WIND 5 SSE UPPER MATECUMBE K 24.85N 80.62W
07/31/2017 M43 MPH GMZ042 FL MESONET
WEATHERFLOW MESONET XALG AT ALLIGATOR REEF LIGHT MEASURED
A WIND OF 29 MPH OR 25 KNOTS AND A GUST OF 43 MPH OR 37
KNOTS.
0100 PM MARINE TSTM WIND 8 SE OCEAN REEF 25.23N 80.21W
07/31/2017 M41 MPH GMZ042 FL MESONET
WEATHERFLOW MESONET XCFL AT CARYSFORT REEF LIGHT MEASURED
A WIND GUST OF 41 MPH OR 36 KNOTS.
&&
KNEGRONPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
158 PM EDT MON JUL 31 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0125 PM MARINE TSTM WIND 8 SE OCEAN REEF 25.23N 80.21W
07/31/2017 M46 MPH GMZ042 FL MESONET
WEATHERFLOW MESONET XCFL AT CARYSFORT REEF LIGHT MEASURED
A WIND OF 38 MPH OR 33 KNOTS AND A WIND GUST OF 46 MPH OR
40 KNOTS.
&&
KNEGRONPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
241 PM EDT MON JUL 31 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0204 PM MARINE TSTM WIND 5 SSE UPPER MATECUMBE K 24.85N 80.62W
07/31/2017 M44 MPH GMZ042 FL MESONET
A MARINE THUNDERSTORM PRODUCE A WIND GUST OF 44 MPH...OR
38 KNOTS FROM THE SOUTHWEST AT THE WEATHEREFLOW MESONET
STATION LOCATED AT ALLIGATOR REEF LIGHT.
&&
SCHESSERPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE KEY WEST FL
242 PM EDT MON JUL 31 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0204 PM MARINE TSTM WIND 5 SSE UPPER MATECUMBE K 24.85N 80.62W
07/31/2017 M44.00 MPH GMZ042 FL MESONET
A MARINE THUNDERSTORM PRODUCE A WIND GUST OF 44 MPH...OR
38 KNOTS FROM THE SOUTHWEST AT THE WEATHERFLOW MESONET
STATION LOCATED AT ALLIGATOR REEF LIGHT.
&&
SCHESSERThe national radar mosaic for the moment the first event began.
1 flood. Local standard time, as filed.
The Monroe County Sheriffs Office reported U.S. Highway One northbound lanes flooded due to heavy rain. A nearby Weather Underground mesonet station reported 2.74 inches of rainfall.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Florida in 2017Every state in 2017This day in weather historyWarnings in Florida, July 2017
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: 717192.