Alert archive / Florida / Special Marine Warnings in 2021

Special Marine Warning 512, NWS Miami, FL

October 29, 2021

NWS Miami, FL issued this special marine warning at Oct 29, 2021, 5:42 AM EDT. It was in force for 63 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Oct 29, 2021, 5:42 AM EDT (09:42 UTC)
Expired
Oct 29, 2021, 6:45 AM EDT
In force
63 min
Issued by
NWS Miami, FL
Area
Storm-based polygon
Hail
0.0 in
Wind
40.0 mph

What forecasters said that day

The local office's own words before this special marine warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Miami, FL wrote its last area forecast discussion before this special marine warning went out at Oct 29, 3:47 AM EDT, 1 hour 55 minutes earlier.

Area forecast discussion, Oct 29, 3:47 AM EDT, 1 hour 55 minutes before
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Hazardous weather outlook, Oct 29, 4:08 AM EDT, 1 hour 34 minutes before
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In the hours before

Special weather statement, Oct 29, 12:17 AM EDT, 5 hours 25 minutes before
Special Weather Statement
National Weather Service Miami FL
1217 AM EDT Fri Oct 29 2021

FLZ067-068-071-072-168-172-290500-
Inland Broward County FL-Coastal Broward County FL-
Coastal Palm Beach County FL-Metro Broward County FL-
Inland Palm Beach County FL-Metro Palm Beach County FL-
1217 AM EDT Fri Oct 29 2021

...A strong thunderstorm will impact portions of Broward and
southeastern Palm Beach Counties through 100 AM EDT...

At 1217 AM EDT, National Weather Service meteorologists were tracking
a strong thunderstorm capable of producing a funnel cloud over East
Toll Gate On Alligator Alley, or 10 miles west of Sunrise, moving
east at 35 mph.

HAZARD...Funnel clouds and winds in excess of 30 mph.

SOURCE...Radar indicated.

IMPACT...Funnel clouds occasionally touch down and produce tornadoes
         or waterspouts. Gusty winds could knock down tree limbs and
         blow around unsecured objects.

Locations impacted include...
Fort Lauderdale, Pembroke Pines, Hollywood, Coral Springs, Pompano
Beach, Davie, Plantation, Sunrise, Boca Raton, Deerfield Beach,
Boynton Beach, Delray Beach, Tamarac, Margate, Lighthouse Point,
Lauderdale-By-The-Sea, Highland Beach, Ocean Ridge, Lauderhill and
Weston.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

These winds can down small tree limbs and branches, and blow around
unsecured small objects. Seek shelter in a safe building until the
storm passes.

&&

LAT...LON 2600 8060 2636 8050 2656 8005 2607 8010
TIME...MOT...LOC 0417Z 260DEG 32KT 2614 8046

FUNNEL CLOUD...POSSIBLE
MAX HAIL SIZE...0.00 IN
MAX WIND GUST...30 MPH

AR
Local storm report, Oct 29, 12:54 AM EDT, 4 hours 48 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
1254 AM EDT FRI OCT 29 2021

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

1241 AM     MARINE TSTM WIND 3 SW KEY BISCAYNE       25.66N 80.19W
10/29/2021  M56 MPH          AMZ630             FL   MESONET

            A THUNDERSTORM WIND GUST OF 48 KNOTS (56
            MPH) WAS RECORDED AT WXFLOW SITE XKBS,
            BISCAYNE BAY LIGHT 20, IN ASSOCIATION WITH A
            LINE OF STORMS MOVING OVER THE AREA.

&&

MOLLEDA
Local storm report, Oct 29, 12:56 AM EDT, 4 hours 46 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
1256 AM EDT FRI OCT 29 2021

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

1242 AM     MARINE TSTM WIND 4 WNW KEY BISCAYNE      25.70N 80.22W
10/29/2021  M43 MPH          AMZ630             FL   PUBLIC

            A THUNDERSTORM WIND GUST OF 38 KNOTS (43
            MPH) WAS RECORDED AT WXFLOW SITE XDIN,
            DINNER KEY LIGHT, IN ASSOCIATION WITH A LINE
            OF STORMS MOVING OVER THE AREA.

&&

MOLLEDA
Local storm report, Oct 29, 1:08 AM EDT, 4 hours 34 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
108 AM EDT FRI OCT 29 2021

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

1248 AM     MARINE TSTM WIND 3 N KEY BISCAYNE        25.73N 80.16W
10/29/2021  M40 MPH          AMZ651             FL   BUOY

            A THUNDERSTORM WIND GUST OF 35 KNOTS (40
            MPH) WAS RECORDED AT NOS SITE VAKF1 IN
            VIRGINIA KEY IN ASSOCIATION WITH A LINE OF
            STORMS MOVING OVER THE AREA.

&&

MOLLEDA
Local storm report, Oct 29, 1:10 AM EDT, 4 hours 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
110 AM EDT FRI OCT 29 2021

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

1253 AM     MARINE TSTM WIND 5 SSE MIAMI BEACH       25.75N 80.10W
10/29/2021  M47 MPH          AMZ651             FL   MESONET

            A THUNDERSTORM WIND GUST OF 41 KNOTS (47
            MPH) WAS RECORDED AT WXFLOW STATION XGVT
            GOVERNMENT CUT IN ASSOCIATION WITH A LINE OF
            STORMS MOVING OVER THE AREA. HEIGHT OF THE
            ANEMOMETER IS 75 FEET.

&&

MOLLEDA
Local storm report, Oct 29, 1:21 AM EDT, 4 hours 21 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE MIAMI FL
121 AM EDT FRI OCT 29 2021

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

1256 AM     MARINE TSTM WIND 8 SSE KEY BISCAYNE      25.59N 80.10W
10/29/2021  M50 MPH          AMZ651             FL   C-MAN STATION

            A THUNDERSTORM WIND GUST OF 43 KNOTS (50
            MPH) WAS RECORDED AT NOAA C-MAN STATION
            FWYF1 FOWEY ROCKS AS A LINE OF STORMS MOVED
            THROUGH THE AREA. HEIGHT OF THE ANEMOMETER
            IS 144 FEET.

&&

MOLLEDA

The office that day

Everything else NWS Miami, FL issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Oct 28, 8:06 PM EDTSpecial Weather StatementMFLHendry39 min
Oct 28, 8:10 PM EDTSpecial Weather StatementMFLCollier50 min
Oct 28, 8:36 PM EDTSevere Thunderstorm WarningMFLCollier39 min
Oct 28, 8:42 PM EDTSpecial Marine WarningMFL33 min
Oct 28, 8:48 PM EDTSpecial Weather StatementMFLPalm Beach27 min
Oct 28, 8:52 PM EDTSpecial Marine WarningMFL23 min
Oct 28, 8:53 PM EDTSpecial Weather StatementMFLCollier, Hendry67 min
Oct 28, 9:16 PM EDTSpecial Weather StatementMFLPalm Beach29 min
Oct 28, 9:42 PM EDTSpecial Marine WarningMFL63 min
Oct 28, 10:32 PM EDTSpecial Marine WarningMFL58 min
Oct 28, 10:45 PM EDTSpecial Marine WarningMFL60 min
Oct 28, 11:02 PM EDTSpecial Weather StatementMFLBroward28 min
Oct 29, 12:00 AM EDTSpecial Weather StatementMFLMiami-Dade45 min
Oct 29, 12:17 AM EDTSpecial Weather StatementMFLBroward43 min
Oct 29, 12:25 AM EDTSpecial Marine WarningMFL65 min
Oct 29, 1:01 AM EDTSpecial Marine WarningMFL59 min
Oct 29, 2:31 AM EDTSpecial Marine WarningMFL44 min
Oct 29, 3:39 AM EDTHigh Surf AdvisoryMFLCollier40 hr
Oct 29, 3:36 PM EDTCoastal Flood StatementMFLCollier20 hr

Nearby

Special Marine Warnings in Florida, 2021Every special marine warning in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.