Florida, 2019

Flood and Coastal Flood in Florida, August 30, 2019

August 30, 2019 · NWS MFL · 2 events in 2 counties and zones

Established easterly flow, combined with plentiful low-level moisture, allowed for scattered showers and a few thunderstorms to develop over the Atlantic waters during the morning. These showers/storms moved onshore along the east coast metro during the morning hours.

Where it happened

Every event with a place to put it; 1 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

  • Tornadoes
  • Tropical storms and surge
  • Floods
  • Wind
  • Hail
  • Winter weather
  • Heat and drought
  • Cold
  • Fire, smoke and dust
  • Marine and coastal
  • Other

Open the live radar over this ground

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
2

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.

What happened

The episode as NWS MFL wrote it up.

Established easterly flow, combined with plentiful low-level moisture, allowed for scattered showers and a few thunderstorms to develop over the Atlantic waters during the morning. These showers/storms moved onshore along the east coast metro during the morning hours. Heavy rainfall rates lead to flooding of streets across areas of Miami-Dade Counties, especially with antecedent soil conditions from prior days rainfall. High tides also contributed to minor coastal flooding across the area.

What forecasters said that day

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 Miami, FL wrote its last area forecast discussion before the first event at Aug 30, 2:56 AM EST, 2 hours 4 minutes earlier.

Area forecast discussion, Aug 30, 2:56 AM EST, 2 hours 4 minutes before
Area Forecast Discussion...CORRECTED
National Weather Service Miami FL
356 AM EDT Fri Aug 30 2019

Corrected AFD to add headlines in the watch/warnings/advisories
section.

...HEAVY RAINFALL POSSIBLE ACROSS SOUTH FLORIDA TODAY...
...MONITORING HURRICANE DORIAN FOR THIS LABOR DAY WEEKEND...

.DISCUSSION...
Heavy rainfall is possible today across South Florida with a
trough of low pressure moving through the region from the Atlantic
waters. Then the focus turns to Hurricane Dorian as it moves
towards the Florida Peninsula this Labor Day Weekend.

TODAY INTO TONIGHT...
High pressure will continue to build into the Florida Peninsula
north of the area from the Western Atlantic waters today, as a
low level trough moves west across South Florida from the Western
Atlantic waters. This will lead to easterly wind flow over South
Florida along with PWAT values around 2.1 to 2.3 inches which is
around the 90th percentile for this time of year. Therefore,
scattered to numerous showers and thunderstorms will develop along
the east and west coast sea breezes today and push inland with
possible heavy rainfall. There is more information in the hydro
section below on the heavy rainfall potential over South Florida
for today.

There is also a mid to upper level low over the Bahamas that will
be moving westward through South Florida today. This will allow
for the 500mb temperatures to cool down to -6 to -7C. Therefore,
some of the storms today could become strong with gusty winds and
frequent lightning strikes.

The showers and thunderstorms should slowly dissipate this evening
over most of South Florida with the loss of heating. However, the
east coast metro areas along with the Atlantic and Gulf waters
could continue to see some showers a few thunderstorms through the
overnight hours.

LABOR DAY WEEKEND...
As for the upcoming Labor Day Weekend, the main concern will be
continuing to monitor Hurricane Dorian. The National Hurricane
Center is continuing to forecast Dorian to move to the west northwest
early this weekend before moving more westward late this weekend.
This would put this system in the northwestern Bahamas or near
the east coast of Florida late this weekend. There is still
uncertainty regarding the details of impacts for South Florida.
Also, it's important not to focus on the exact details of the
forecast track owing to uncertainty in the evolution of this
system and the potential for impacts to extend well away from its
center. Residents and visitors of South Florida should continue to
monitor the forecast as the details become clearer in the days
going forward. This is also a good reminder to make sure that your
hurricane plan and supply kits are in order as we head into the
peak of the Hurricane Season.

EXTENDED FORECAST...
The extended forecast will also depend on the location and
strength of Hurricane Dorian. At this time, it looks like South
Florida could be in an southerly wind flow keeping the deep
tropical moisture in place. Therefore, will keep scattered showers
and thunderstorms in place for the middle to end of next week but
this can change depending on how the strength and location of
Hurricane Dorian.

There is a potential for impacts related to Hurricane Dorian to
persist into next week. There is a lot of uncertainty about this
potential, but some risk for a prolonged period of heavy rain and
strong wind may linger later into the week.

&&

.MARINE...
The winds will be mainly from the easterly direction today into
early this weekend with speeds of 15 knots or less. There will
also be a small northeast swell of 2 feet or less affecting the
Atlantic waters of Palm Beach County through today. This will
allow for the seas to be 2 to 4 feet in the Palm Beach Atlantic
waters with rest of the Atlantic waters at 2 to 3 feet today
before decreasing to 2 feet or less for Saturday. The Gulf waters
will also remain at 2 feet or less through Saturday.

The marine forecast for late this Labor Day weekend will all
depend on the strength and position of Hurricane Dorian. All
boaters need to stay informed with the latest forecast from the
National Weather Service on Hurricane Dorian.

&&

.BEACH FORECAST...
The threat of rip currents will continue to increase across the
east coast beaches this Labor Day weekend, due to the small
northeast swells today, increasing onshore flow, along with the
approach of Hurricane Dorian for late this Labor Day Weekend.
A High Risk of Rip Currents is in effect for the beaches of Palm
Beach County through tonight.

There will also be a new moon phase early this Labor Day Weekend.
This will allow for the tides to run about 0.5 to 1 inch above
the predicted levels. These levels along with the small northeast
swells will lead to some minor coastal flooding along the east
coast beaches of South Florida during the high tide cycles.
Therefore, a Coastal Flood Statement is in effect for the east
coast beaches of South Florida through Saturday morning.

&&

.HYDROLOGY...
With the ground somewhat saturated from the earlier week of shower
and thunderstorms over South Florida and additional rainfall
amounts of 1 to 3 inches possible across the area today, there
could be some minor street and low lying flooding across the metro
areas of South Florida with any showers and thunderstorms that do
develop. WPC has also put South Florida in a Marginal Risk of
flooding for today.

&&

.PRELIMINARY POINT TEMPS/POPS...
West Palm Beach  90  80  90  80 /  50  40  50  40
Fort Lauderdale  89  81  89  81 /  50  40  50  40
Miami            91  80  91  80 /  50  40  50  40
Naples           91  77  91  77 /  70  30  80  40

&&

.MFL WATCHES/WARNINGS/ADVISORIES...
FL...High Rip Current Risk through Saturday morning for FLZ168.
AM...None.
GM...None.
&&

DISCUSSION...54/BNB
MARINE...54/BNB
BEACH FORECAST...54/BNB
HYDROLOGY...54/BNB
Hazardous weather outlook, Aug 30, 2:55 AM EST, 2 hours 5 minutes before
Hazardous Weather Outlook for South Florida
National Weather Service Miami FL
355 AM EDT Fri Aug 30 2019

AMZ610-630-650-651-670-671-FLZ063-066>075-168-172>174-GMZ656-657-676-
302000-
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-
355 AM EDT Fri Aug 30 2019

...Thunderstorms Expected Across South Florida Today...
...High Rip Current Risk for the Palm Beaches...

This hazardous weather outlook is for South Florida.

.DAY ONE...TODAY AND TONIGHT

Rip currents: A northeast long-period swell will lead to a High Risk
of Rip Currents along the Palm Beaches today. A moderate risk of rip
currents is forecast for the Miami-Dade and Broward beaches.

Coastal Flooding: Minor coastal flooding will be possible along the
east coast beaches at high tide this evening due to the new moon and
increased northeast swell.

Thunderstorms: Scattered to widespread thunderstorms are expected
across South Florida this afternoon, with the greatest coverage over
the interior. The primary hazards will be heavy rainfall, gusty
winds, and lightning.

Waterspouts: Isolated waterspouts are possible across all South
Florida waters.

Flooding: Heavy rainfall will be possible with showers and
thunderstorms today. Slow moving storms may lead to the threat for
ponding of water along streets and in low lying areas.

Temperatures: Heat indices will climb into the 100 to 106 degree
range this afternoon. Please use caution if working outdoors.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

Scattered to locally numerous storms are expected each day this
weekend across South Florida. The main hazards will be lightning,
locally heavy rainfall, and gusty winds.

A long-period northeasterly swell moving through the local Atlantic
waters will bring an increased rip current risk to the east coast.

The New Moon and increased swell will continue to bring elevated
tidal levels to the East Coast beaches into this weekend. Minor
coastal flooding will be possible at high tides.

Hurricane Dorian will likely approach and affect the Florida
Peninsula late in the holiday weekend. It is still too soon to know
the finer details of the impacts to South Florida. Please continue to
monitor the progress of Dorian through the week. Now is a good time
to make sure your household hurricane plan is in order.

.SPOTTER INFORMATION STATEMENT...

Widespread spotter activation is not anticipated, however individual
spotters are encouraged to report high wind, waterspouts, and
flooding to the National Weather Service forecast office in Miami.

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

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

1 flood, 1 coastal flood. Local standard time, as filed.

Flood, Miami-Dade

When
August 30, 5:00 AM EST to 9:00 AM EST
Where
Miami-Dade County, 1.98 mi WNW of Miami to 1.51 mi NE of Coral Gables
Cause
Heavy Rain
Reported by
Broadcast Media
Coordinates
25.776, -80.231

WSVN meteorologist reported street flooding near Little Havana by Flagler Street. Water halfway up some cars parked by the median.

Coastal Flood, Coastal Miami-Dade County

When
August 30, 8:00 AM EST to 10:00 AM EST
Where
Coastal Miami-Dade County forecast zone
Reported by
Social Media
Coordinates
25.609, -80.499 (the zone’s center; the record gives no point)

WPLG's social media reported coastal flooding from King tides at the Haulover Marina Parking lot.

What these are

Flood
Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
Coastal Flood
Flooding of coastal land by the sea, from storm surge, onshore wind or high tides.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Florida in 2019Every state in 2019This day in weather historyWarnings in Florida, August 2019

Sources

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: 851079, 851080.