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fxus61 kokx 240442 

Area forecast discussion
National Weather Service New York New York
1242 am EDT Sat Jun 24 2017

a cold front will slowly approach and move across this morning
into the afternoon. A secondary cold front moves across
tonight. High pressure builds to our southwest Sunday into
Monday. A weak cold front will move through our area later
Monday. High pressure builds towards the mid Atlantic coast
Tuesday and Wednesday, before moving offshore Thursday.
Unsettled weather return for the end of the week.


Near term /until 6 am this morning/...
will monitor upstream showers/tstms, and with increasing
coverage across our area this morning. Primary threat will be
localized flash flooding in a very tropical air mass as the
remnants of Tropical Storm Cindy move northeastward along an
approaching cold front. In addition, increasing low level jet
and potential backing of low level winds ahead of remnant low
could aid stronger storm development early this morning.

Lows were a blend of nam12/gmos and adjusted slightly higher.
Boundary layer moistens with patchy fog developing, especially
in areas that are outside the rain showers.


Short term /6 am this morning through 6 PM Sunday/...
starting out Saturday morning, the remnant low of Cindy with
the showers and thunderstorms will be near to just southwest of
the region. Heavy rain threat remains early in the morning with
patchy fog early especially in areas outside of rain showers. It
moves south of Long Island this afternoon as the cold front
moves across. The showers and thunderstorms move offshore in the
afternoon as winds become more westerly. Depending on how fast
clouds decrease, the surface temperatures could warm up quickly.
Expecting an above normal day regarding temperatures with
boundary layer mixing giving highs mid to upper 80s most places
with some lower 90s in northeast New Jersey using gmos with slight

For Saturday night, a secondary cold front moves across which
will result in winds becoming more northerly late Saturday night
after its passage. Dry conditions, light winds and continued
mostly clear conditions will result in radiational cooling. A
vast range of lows will be seen in the region from upper 50s in
rural inland sections to lower 70s in parts of NYC from the met

A moderate risk of rip currents is forecast for Saturday.


Long term /Sunday night through Friday/...
dry conditions expected on Sunday as a ridge of high pressure builds
towards the mid Atlantic coast. Expect high temperatures to be in
the low to mid 80s on Sunday. A weak surface cold front will affect
the local area Monday afternoon into Tuesday. The system will not
have a great deal of moisture associated with it, but cooler
temperatures aloft may spark off a shower or T-storm late Monday
into early Tuesday. High temperatures on Monday and Tuesday are
expected to be in the mid to upper 70s to lower 80s.

High pressure continues to build towards the area on Wednesday and
slowly moves offshore on Friday. A few showers are possible Friday
afternoon. Temperatures will start out in the upper 70s to near 80
on Wednesday then slowly increase to mid to upper 80s by Friday.


Aviation /06z Saturday through Wednesday/...
a cold front approaches this evening, then slowly moves through
the terminals by around 12 to 16z tomorrow morning. Initial area
of thunderstorms will gradually decrease in intensity as they
approach the western-most terminals this evening - including the
NYC Metro area. Additional showers and thunderstorms are
expected overnight with the approach of the cold front, with
heavy rain and reduced visibility possible at times.

Winds for most of the night will be from the south-southwest
with occasional gusts to around 20 kt possible. A low level jet
will move up the coast, with a brief period of low level wind shear possible
primarily at LGA/JFK/isp and to a lesser extent elsewhere.
Following the front tomorrow morning, winds will shift to west-
northwest with increasing gusts through the day and decreasing
cloud cover.

New York Metro enhanced aviation weather support...

Detailed information, including hourly taf wind component forecasts,
can be found at: http:/www.Weather.Gov/zny/n90

Kjfk taf comments: amendments possible for showers and
thunderstorms. Wind gusts may be stronger than forecast for

Klga taf comments: amendments possible for showers and
thunderstorms. Wind gusts may be stronger than forecast for

Kewr taf comments: amendments possible for showers and
thunderstorms. Wind gusts may be stronger than forecast for

Kteb taf comments: amendments possible for showers and
thunderstorms. Wind gusts may be stronger than forecast for

Khpn taf comments: amendments possible for showers and
thunderstorms. Wind gusts may be stronger than forecast for

Kisp taf comments: amendments possible for showers and
thunderstorms. Low chance of IFR conditions developing
overnight. Wind gusts may be stronger than forecast for

Outlook for 00z Sunday through Wednesday...
Saturday night-Sunday night...VFR. Gusty west-northwest flow diminishing
in the evening.
Monday-Tuesday...VFR. A chance of shra/tsra Monday afternoon into


conditions on the waters are becoming more rough. Sub Small Craft Advisory winds
on non-ocean waters are expected through Saturday night. Ocean
stays in Small Craft Advisory through much of Saturday night. Less Small Craft Advisory winds
Saturday night with an overall weak pressure gradient with
residual higher seas.

Conditions across the area waters are expected to remain below
Small Craft Advisory levels Sunday through the middle of the


the potential for minor urban and poor drainage flooding with
localized possible flash flooding will remain with the showers
and thunderstorms forecast this morning. Total rain expected is
0.5 to 1 inch with locally higher amounts. The precipitable
waters increase to near 2.3 to 2.4 inches with tropical
moisture from the remnants of Cindy getting entrained along the

There is a threat for flash flooding through 14-16z from
complex of showers and thunderstorm associated with a frontal
wave (remnants of cindy) moving through the areas. Will monitor
as morning progresses.

There are no hydrologic impacts expected Sunday and through the
end of the week.


Tides/coastal flooding...
astronomical tides are running very high, especially during the
evening high tide cycles.

Less than 1 ft of surge is needed during these evening high tide
cycles for minor flooding, and in some cases less then 1/2 ft.
The expected S/SW flow is not favorable for surge, but a
background anomaly will likely be enough for minor coastal
flooding of the most vulnerable coastal locales along the South
Shore bays of western Long Island, along Jamaica Bay, and along
western Long Island Sound during this time.


kokx weather radar is scheduled for maintenance starting today June
23rd for a period of 3 days.


Okx watches/warnings/advisories...
New York...none.
New Jersey...none.
Marine...Small Craft Advisory until 2 am EDT Sunday for anz355.
Small Craft Advisory until 6 am EDT Sunday for anz350-353.


near term...jmc/MD/jm/pw
long term...fig

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