Alert archive / Florida / Special Marine Warnings in 2020

Special Marine Warning 511, NWS Miami, FL

August 29, 2020

NWS Miami, FL issued this special marine warning at Aug 29, 2020, 7:37 PM EDT. It was in force for 53 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
Aug 29, 2020, 7:37 PM EDT (23:37 UTC)
Expired
Aug 29, 2020, 8:30 PM EDT
In force
53 min
Issued by
NWS Miami, FL
Area
Storm-based polygon
Hail
0.0 in
Wind
34.0 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 Aug 29, 3:21 PM EDT, 4 hours 16 minutes earlier.

Area forecast discussion, Aug 29, 3:21 PM EDT, 4 hours 16 minutes before
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Hazardous weather outlook, Aug 29, 8:48 AM EDT, 10 hours 49 minutes before
Hazardous Weather Outlook for South Florida
National Weather Service Miami FL
848 AM EDT Sat Aug 29 2020

AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676-
300100-
Lake Okeechobee-Biscayne Bay-
Coastal waters from Jupiter Inlet to Deerfield Beach FL out 20 NM-
Coastal waters from Deerfield Beach to Ocean Reef FL out 20 NM-
Waters from Jupiter Inlet to Deerfield Beach FL from 20 to 60 NM-
Waters from Deerfield Beach to Ocean Reef FL from 20 to 60 NM
excluding the territorial waters of Bahamas-Glades-Hendry-
Inland Palm Beach-Metro Palm Beach-Coastal Collier-Inland Collier-
Inland Broward-Metro Broward-Inland Miami-Dade-Metro Miami-Dade-
Mainland Monroe-Coastal Palm Beach-Coastal Broward-Coastal Miami-
Dade-Far South Miami-Dade-
Coastal waters from Chokoloskee to Bonita Beach FL out 20 NM-
Coastal waters from East Cape Sable to Chokoloskee FL out 20 NM-
Waters from Chokoloskee to Bonita Beach FL from 20 to 60 NM-
848 AM EDT Sat Aug 29 2020

...SCATTERED THUNDERSTORMS THIS AFTERNOON/EVENING...
...HEAT INDICES OF 105-107 ACROSS MUCH OF THE AREA...

This hazardous weather outlook is for South Florida.

.DAY ONE...TODAY AND TONIGHT

Thunderstorms: Scattered showers and thunderstorms across South
Florida this afternoon and evening. Main concerns will be occasional
to lightning, gusty winds, and urban type flooding of roadways.

Temperatures: Heat indices will be in the 105-107 degree range this
afternoon.

Wind: An isolated strong wind gust up to 50mph is possible in the
strongest storms this afternoon.

Waterspouts: There is a slight chance of waterspouts for all South
Florida waters today.

Flooding: Slow moving to nearly stationary heavy rain could lead to
the flooding of some roadways in typical poor drainage and low laying
areas of Broward and Palm Beach counties this afternoon and evening.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

Scattered to locally numerous thunderstorms are possible each day,
with best chances across the interior and Lake Okeechobee regions
during the afternoon and evening hours. Main concerns will be
occasional to frequent lightning strikes, gusty winds, and locally
heavy rainfall.

Heat index values will continue to exceed 105 degrees over much of
South Florida during the afternoon hours through the Sunday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed.

For more information...visit the National Weather Service in
Miami website at www.weather.gov/miami.

In the hours before

Special weather statement, Aug 29, 3:08 PM EDT, 4 hours 29 minutes before
Special Weather Statement
National Weather Service Miami FL
308 PM EDT Sat Aug 29 2020

FLZ071>074-173-291945-
Inland Broward County FL-Metro Broward County FL-
Metropolitan Miami Dade FL-Inland Miami-Dade County FL-
Coastal Miami Dade County FL-
308 PM EDT Sat Aug 29 2020

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN MIAMI-DADE AND SOUTHERN
BROWARD COUNTIES UNTIL 345 PM EDT...

* At 308 PM EDT, National Weather Service meteorologists were
  tracking strong thunderstorms along a line extending from near
  Sunrise to West Park. These storms were nearly stationary.

* Winds in excess of 45 mph and funnel clouds possible with these
  storms.

* Locations impacted include...
  Fort Lauderdale, Pembroke Pines, Hollywood, Miramar, Pompano Beach,
  Davie, Plantation, Sunrise, Tamarac, Margate, Miami Gardens,
  Lauderhill, Weston, North Miami, Coconut Creek, North Miami Beach,
  Oakland Park, North Lauderdale, Lauderdale Lakes and Dania Beach.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This activity was also developing in an environment favorable for the
formation of funnel clouds. Stay tuned to NOAA weather radio and
local media for additional updates and possible warnings.

To report severe weather, contact your nearest law enforcement
agency. You can also share your report with NWS Miami on Facebook and
Twitter.

&&

LAT...LON 2620 8039 2591 8039 2590 8019 2623 8018
TIME...MOT...LOC 1908Z 052DEG 3KT 2615 8026 2597 8028

Weinman
Special weather statement, Aug 29, 3:41 PM EDT, 3 hours 56 minutes before
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Special weather statement, Aug 29, 6:59 PM EDT, 38 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 29, 3:08 PM EDTSpecial Weather StatementMFLBroward37 min
Aug 29, 3:41 PM EDTSpecial Weather StatementMFLBroward34 min
Aug 29, 6:59 PM EDTSpecial Weather StatementMFLBroward46 min
Aug 29, 7:44 PM EDTSpecial Weather StatementMFLBroward46 min

Nearby

Special Marine Warnings in Florida, 2020Every special marine warning in 2020

Sources

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