Area Forecast Discussion
Issued by NWS Miami, FL

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FXUS62 KMFL 230733

Area Forecast Discussion
National Weather Service Miami FL
333 AM EDT Fri Mar 23 2018



High pressure over the southeastern United States will move slowly
southward through Saturday and by Sunday be located over South
Florida, as a cold front moves southward into the Southeastern
United States allowing for a low pressure system to develop off
the coast of the Carolinas. This will keep the dry weather in
place over South Florida through the weekend, as the winds swing
from a northerly direction today to a southerly direction late
this weekend.

The swing in the wind direction this weekend will allow for the
temperatures to warm up through the weekend across South Florida,
with highs warming from the 70s today to the mid to upper 80s by
Sunday. Lows will also warm up through the weekend with lows
tonight in the mid to upper 40s over the interior areas to mid 50s
to around 60 over the metro areas, before warming up into the mid
to upper 50s over the interior areas to mid to upper 60s over the
metro areas by Sunday night.

High pressure will then dissipate early next week over the Florida
Keys, as the low moves slowly northeast into the northern
Atlantic waters. This will allow for a back door cold front to
move through South Florida early next week bringing a slight
chance of showers to the east coast metro areas and the adjacent
waters Monday night as the front moves through.

High pressure will then build into the Western Atlantic waters for
the middle to end of next week from the north, as the low
continues to move slowly northeast away from the United States.
This will bring back the dry weather to South Florida for the
middle to end of next week.


Northerly winds of 10 to 15 knots will continue over South Florida
waters today before swinging to a easterly direction on Saturday.
The winds will then continue to swing to a southerly direction on
Sunday with speeds decreasing to less than 10 knots, before
backing again to an easterly direction with speeds increasing to
at least 15 to 20 knots early next week behind the passage of the
cold front.

The Atlantic Seas will be 3 to 5 feet today before subsiding to 2
feet or less by Sunday into Monday. The Atlantic seas will then
quickly build to 7 feet or higher for the middle of next week
behind the passage of the cold front. The Gulf seas will remain
below 5 feet through the middle of next week.


The threat of rip currents will be low along both beaches of
South Florida today. The threat of rip currents along the east
coast beaches will then increase this weekend into middle of next
week, as the winds become more easterly and increase especially
middle of next week.


The very dry air will remain in place over South Florida today
into tonight, before slowly modifying through the weekend.
The relative Humidity today will again get down into the 20s over
most areas, except lower to mid 30s along the east coast metro
areas. On Saturday, the relative humidity should be in the lower
to mid 30s over the western interior areas with rest of South
Florida being in the upper 30s to lower 40s, and by Sunday the
relative humidity should be above the 35 percent critical value
over all of South Florida. The 20 foot winds will remain below 15
mph today through the weekend over South Florida. Therefore, no
headlines for fire weather are expected at this time for South
Florida for the weekend.


West Palm Beach  74  56  77  62 /   0   0   0   0
Fort Lauderdale  75  59  78  65 /   0   0   0   0
Miami            76  60  79  64 /   0   0   0   0
Naples           75  54  79  62 /   0   0   0   0



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