Weather with Bill Evans
National Weather Service New York NY
Friday July 18, 2025
On the heels of a cold frontal passage, high pressure will
build from the Great Lakes through tonight, then pass offshore
Saturday with a warm front approaching from the south. The front
will move through Sunday morning, followed by a cold frontal
passage late Sunday. High pressure will follow for Sunday night
through Tuesday. A frontal boundary will be nearby for Wednesday
and Thursday.
Cold front has cleared the area. NW winds gusting to 20-25 mph
in its wake into early afternoon will usher in a more
refreshing mid summer air mass, with partly to mostly sunny
skies under high clouds streaming across from the west, high
temps close to the mid summer average, and afternoon dewpoints
55-60. Diminishing winds later this afternoon may allow a light
sea breeze to develop along the immediate south shore of Long
Island late.
Mostly clear skies and light winds tonight will promote
radiational cooling, with low temps ranging from the upper
50s/lower 60s inland, to the lower 70s in NYC and immediate
eastern/western suburbs.
Flow aloft will be zonal, with the sfc high moving offshore and
winds becoming S. A weak shortwave trough may allow a few
showers and possibly a tstm to develop in the afternoon from the
NYC metro area west, with S CT and Long Island remaining mostly
dry via more stable marine influence. High temps will again be
close to the seasonal avg, with dewpoints rising through the
60s.
As an upper trough moves across E Canada, heights aloft will
start to fall, with a weak frontal system approaching Sat night
into Sunday and bringing chances for showers and tstms. With PW
near 2 inches any tstms could produce brief/locally heavy rain
rainfall.
WAA will lead to a warmer and more humid night Sat night, with
lows 70-75 and dewpoints in the upper 60s/lower 70s by daybreak.
Temps daytime Sunday will also be warmer, with highs near 90 in
NE NJ and in the mid/upper 80s most elsewhere.
Timing of the cold front passage remains consistent and looks
to be Sunday late afternoon/evening. Much drier air returns
behind the cold front with temperatures returning to more
seasonal normals Monday through Wednesday. The cold front that
moved through Sunday/Sunday night will remain south of the
region, and possibly return north as a warm front later
Wednesday into Thursday, bringing warmer and humid conditions
back to the area.
Seas are still at 5 ft on the ocean E of Moriches Inlet, so the
SCA will remain in effect there til daybreak. High pressure will
build in today, with conditions remaining below SCA thresholds
thereafter into Tue night.
For late Sat night into Sunday, with PW near 2 inches, any tstms
could produce brief/locally heavy rain rainfall.
Widespread impacts not expected attm.
A moderate rip current risk has been forecast for the Nassau and
Suffolk beaches for today, with 4-ft wind waves at 6-sec period
still out of the SW. The rip current risk for Sat has been
changed to low, with 2-ft southerly wind waves at 6-sec period
and S winds mostly 10 kt or less.
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