Special Marine Warning 149, NWS Key West, FL

111 
FZUS72 KKEY 150220
MWSKEY

Marine Weather Statement
National Weather Service Key West FL
1020 PM EDT Sat Aug 14 2021

GMZ074-150230-
/O.EXP.KKEY.MA.W.0149.000000T0000Z-210815T0230Z/
1020 PM EDT Sat Aug 14 2021

...THE SPECIAL MARINE WARNING WILL EXPIRE AT 1030 PM EDT...

The affected areas were... 
Straits of Florida from west end of Seven Mile Bridge to south of
Halfmoon Shoal 20 to 60 nm out...

The shower has weakened and no longer poses a significant threat to
boaters.

LAT...LON 2353 8213 2419 8220 2420 8181 2423 8162
      2356 8158 2352 8185
TIME...MOT...LOC 0220Z 181DEG 26KT 2411 8189 

$$

TD

Area Forecast Discussion
National Weather Service Key West FL
649 PM EDT Sat Aug 14 2021

.DISCUSSION...
Currently - The broad remnants of Fred is located north of
western Cuba and continues to move west northwestward at around 13
mph. Despite Fred's ragged remains, the environment remains rich
with tropical moisture within a broad confluent area near and
around Fred. This is contributing to many areas of scattered to
numerous heavy showers and scattered thunderstorms. Latest radar
imagery indicate that much of the convection in the Keys are
aligned along a broad broken band stretching from the deep gulf
zones off of mainland Monroe, across much of the Florida Keys and
into the Florida Straits off of the Upper Keys. Convective
elements within the band have been moving northwestward at around
40 mph and are regularly producing gusts of 40 to 45 mph. Many
island locations along the Florida Keys have received anywhere
from a quarter to one and a quarter inches of precipitation.

Meanwhile, Tropical Storm Grace continues to move rapidly westward
towards the Windward Islands.

Forecast - Over the next 24 hours, the remnants of Fred will
gradually turn more northwestward into the central Gulf of Mexico
on Sunday and is expected to redevelop into a depression. As the
remnants of Fred move further away, it will gradually pull its
large swath of showers and thunderstorms with it. Conditions will
gradually improve with decreasing winds and diminishing shower and
thunderstorm coverage beginning late tonight.

Gradually, the Keys will become increasingly under the dominion of
an Atlantic ridge building westward into the southeastern United
States. Consequently, winds will moderate further and back more
southeast then east southeasterly. Winds are expected to lull
significantly on Tuesday a spoke of the ridge builds across
Florida. Deep layered moisture will gradually decrease, returning
the Keys to a more seasonable mid summer time environment with
decent CAPE and weak inhibition. Will maintain low to mid chance
pops through the first half of the week. Expect near normal
temperatures with dew points in the mid 70s.

After the rather brief break from From the departed Fred, Tropical
Storm Grace will continue to race westward into the Caribbean Sea
brush Puerto Rico late Sunday and pass over Hispaniola from early
Monday through early Tuesday. Grace should then continue over Cuba
through Tuesday and into the Florida Straits on Wednesday. Due to
the substantial land interaction, the current National Hurricane
Center forecast brings Grace into our area as a Tropical Storm.
On the official forecast track, tropical storm conditions will be
possible for the Florida Keys and surrounding waters beginning
Wednesday and ending on Thursday. With all that said, uncertainty
remains large and Grace could behave much as Fred did due to the
land interaction. Stay tuned.

&&

.MARINE...
The remnants of Fred will continue to move west northwestward and
further away from Keys waters. In the very short term winds will
remain fresh with occasional gusts to around 40 knots in squalls.
Conditions will gradually improve from late tonight into tomorrow
as winds begin to relax in earnest and convective coverage
diminishes. Atlantic ridge will begin to take control of Keys
weather and gentle to moderate southeasterly breezes and a more
normal distribution of showers and thunderstorms will prevail.
Winds will likely fall to their minimum on Tuesday as a spoke of
the ridge builds across the Florida peninsula. This break will be
short lived however as Tropical Storm Grace, currently racing
westward towards the Windward Islands is expected to reach the
Florida Straits on Wednesday and then out into the Gulf of Mexico
on Thursday. While confidence remains quite low due to track
uncertainties and possibly significant interaction with the
Greater Antilles and Cuba, tropical storm conditions could once
again return to Keys waters for a day or two beginning around mid
week.

&&

.AVIATION...
VFR conditions will prevail at MTH and EYW island terminals through
18z/15th with brief periods of MVFR ceilings and IFR visibilities
with passing showers and squalls associated with the remnants of
Fred as it continues moving west to northwest away from the island
chain. Gusty conditions are expected to remain at EYW with southeast
sustained winds of 15 to 20 knots and occasional to frequent gusts
near 30 knots, while MTH will continue on a downward trend of
southeast sustained withs of 10 to 15 knots and occasional to
frequent gusts near 20.

&&

.PRELIMINARY POINT TEMPS/POPS...
Key West  79  90  81  91 / 80 60 40 40
Marathon  79  88  81  88 / 80 60 40 40

&&

.KEY WATCHES/WARNINGS/ADVISORIES...
FL...Flood Watch through late tonight for FLZ076>078.

GM...Small Craft Advisory for GMZ031>035-042>044-052>055-072>075.

&&

Public/Marine/Fire...11
Aviation/Nowcasts....tdestri
Data Acquisition.....DR

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Hazardous Weather Outlook
National Weather Service Key West FL
521 AM EDT Sat Aug 14 2021

FLZ076>078-GMZ031>035-042>044-052>055-072>075-150930-
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-
521 AM EDT Sat Aug 14 2021

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

.DAY ONE...TODAY AND TONIGHT

Fred is expected to track near or west of the Dry Tortugas
this evening, then potentially strengthen into a tropical storm
as it pulls away from the Dry Tortugas. Hazards for the Florida
Keys will include flooding rainfall, isolated tornadoes, and
treacherous marine conditions. Thundery squalls will be capable of
localized wind gusts near 45 mph and lightning strikes.
Conditions are not likely to improve until after midnight.

A Flood Watch remains in effect until late tonight. Rainfall
totals of 3 to 5 inches with isolated higher totals will result in
a significant potential for flooding of streets and poor drainage
areas, especially during the times of high tide.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

Isolated thunderstorms will be possible Sunday through Friday.
The primary thunderstorm hazards will be lightning strikes.

The long range forecast for Tropical Storm Grace indicates a
persistent path to the west-northwest through the Greater
Antilles, then the Bahamas, and possibly into portions of the
Florida Keys and South Florida in four to five days. It is still
too early to discuss all of the possible impacts, although
confidence in another round of locally heavy rainfall is
increasing.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated.

CLR

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
819 PM EDT SAT AUG 14 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0800 PM     MARINE TSTM WIND 2 SW BIG COPPITT KEY    24.58N 81.68W
08/14/2021  M41 MPH          LOWER KEYS IN MONR FL   ASOS

            A SOUTHEAST WIND GUST OF 36 KTS, OR 41 MPH, WAS RECORDED
            BY THE NAS KEY WEST ASOS ON BOCA CHICA KEY AT 800 PM EDT.

&&

ROSS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
822 PM EDT SAT AUG 14 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0600 PM     MARINE TSTM WIND 5 ENE EAST END OF SEVEN 24.73N 81.06W
08/14/2021  M43 MPH          MIDDLE KEYS IN MON FL   ASOS

            A SOUTH-SOUTHEAST WIND GUST OF 37 KTS, OR 43 MPH, WAS
            RECORDED BY THE FLORIDA KEYS MARATHON INTERNATIONAL
            AIRPORT ASOS AT 600 PM EDT.

&&

ROSS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
831 PM EDT SAT AUG 14 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0413 PM     MARINE TSTM WIND 3 WSW NILES CHANNEL BRI 24.65N 81.48W
08/14/2021  M47.00 MPH       LOWER KEYS IN MONR FL   MESONET

            A WIND GUST OF 41 KTS, OR 47 MPH, WAS RECORDED BY CWOP
            STATION CW0925 ON CUDJOE KEY AT 413 PM EDT.

0533 PM     MARINE TSTM WIND 3 WSW NILES CHANNEL BRI 24.65N 81.48W
08/14/2021  M40.00 MPH       LOWER KEYS IN MONR FL   MESONET

            A WIND GUST OF 35 KTS, OR 40 MPH, WAS RECORDED BY CWOP
            STATION CW0925 ON CUDJOE KEY AT 533 PM EDT.

&&

ROSS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
833 PM EDT SAT AUG 14 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0830 PM     MARINE TSTM WIND 5 WSW BOCA CHICA CHANNE 24.55N 81.79W
08/14/2021  M44 MPH          LOWER KEYS IN MONR FL   OFFICIAL NWS OBS

            A SOUTHEAST WIND GUST OF 38 KTS, OR 44 MPH, WAS RECORDED
            BY THE FLORIDA KEYS NWS RSOIS AT 830 PM EDT.

&&

ROSS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
841 PM EDT SAT AUG 14 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0826 PM     MARINE TSTM WIND 14 NW KEY WEST          24.71N 81.93W
08/14/2021  M40 MPH          GMZ033             FL   MESONET

            A SOUTHEAST WIND GUST OF 35 KTS, OR 40 MPH, WAS RECORDED
            BY THE WEATHERFLOW MESONET SITE AT SMITH SHOAL LIGHT AT
            826 PM EDT.

&&

ROSS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE KEY WEST FL
846 PM EDT SAT AUG 14 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0820 PM     MARINE TSTM WIND 10 SW KEY WEST          24.46N 81.89W
08/14/2021  M45 MPH          GMZ044             FL   C-MAN STATION

            AN EAST-SOUTHEAST WIND GUST OF 39 KTS, OR 45 MPH, WAS
            RECORDED BY THE SAND KEY C-MAN STATION AT 820 PM EDT.
            THIS STATION ALSO RECORDED A 1-MINUTE WIND SPEED OF 37
            KTS, OR 43 MPH, AT 814 PM EDT.

&&

ROSS