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3 products issued by NWS for: Marathon FL
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Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Key West FL
426 AM EDT Sun Sep 20 2020

FLZ076>078-GMZ031>035-042>044-052>055-072>075-211000-
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-
426 AM EDT Sun Sep 20 2020

This Hazardous Weather Outlook is for the Florida Keys and
adjacent coastal waters.

.DAY ONE...TODAY AND TONIGHT

Atmospheric conditions will be somewhat favorable for waterspouts
today along the nearshore waters of the Florida Keys. Waterspouts
tend to form beneath lines of building cumulus clouds, just at
the hint of rain. Waterspouts can easily flip boats, and should be
avoided always.

Minor saltwater flooding of low elevation streets and lots is
likely to continue across Bayside communities of the Upper Keys
and parts of the Middle Keys today.

Isolated thunderstorms will be possible along the Florida Keys
and surrounding coastal waters today, with scattered thunderstorms
possible tonight. The primary thunderstorm hazards will be cloud
to surface lightning strikes and locally gusty winds.

Small Craft Advisories will likely be required for the eastern
Straits of Florida tonight, due to building north swell.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

Scattered thunderstorms will be possible Monday through Tuesday
morning, then again Thursday through Saturday. The primary
thunderstorm hazards will be cloud to surface lightning strikes
and locally gusty winds. The strongest thunderstorm wind gusts are
expected Monday and Monday night.

Small Craft Advisories will likely be required for parts of the
Keys waters on Monday, and are expected for all waters Monday
night into Tuesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

$$



Short Term Forecast

Short Term Forecast
National Weather Service Key West FL
417 AM EDT Sun Sep 20 2020

FLZ077-078-GMZ031>035-044-054-055-074-075-201200-
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 west end of Seven Mile Bridge to Halfmoon Shoal
out to the reef-
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 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-
Including the Communities of Marathon and Key West
417 AM EDT Sun Sep 20 2020

.NOW...
Until 8 am, isolated showers will slowly develop on the Outer waters
of Mainland Monroe, the waters surrounding the Middle and Upper Keys
including the waters in and around Dry Tortugas. Movement of most
activity will be toward the southwest at 5 to 10 knots. Over land, a
few showers may affect the Lower and Middle Keys. A few showers will
reduce visibility below 4 miles.

$$



APA



Coastal Flood Statement

Coastal Hazard Message
National Weather Service Key West FL
230 AM EDT Sun Sep 20 2020

FLZ077-210000-
/O.EXB.KKEY.CF.S.0004.000000T0000Z-200921T0000Z/
Monroe Middle Keys-
230 AM EDT Sun Sep 20 2020

* WHAT...Minor saltwater flooding.

* WHERE...Middle Florida Keys.

* WHEN...Through early this evening.

* IMPACTS...Minor saltwater flooding of low elevation streets
  and lots is likely. Some storm drains will overflow, and some
  seawalls and docks will be overtopped. Boaters can expect less
  clearance under fixed bridges. Motorists should remember that
  persistent puddles around the times of high tide are almost
  certain to contain a mix of saltwater.

* ADDITIONAL DETAILS...The minor saltwater flooding will be most
  pronounced around the times of high tide, which will be during
  the predawn hours this morning, and again late this afternoon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Do not drive through flooded roadways.

&&

$$



U.S. Dept. of Commerce
NOAA National Weather Service
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Silver Spring, MD 20910
E-mail: w-nws.webmaster@noaa.gov
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