Special Weather Statement, NWS New York, NY

Area Forecast Discussion
National Weather Service New York NY
133 PM EDT Wed Jul 21 2021

.SYNOPSIS...
A surface trough will remain nearby today, with a cold front
sweeping across this afternoon into early this evening. High
pressure will build tonight into Thursday. The high will then
weaken Thursday night which allows a cold front to pass through
on Friday. High pressure briefly builds back in on Saturday,
followed by a warm front moving through on Sunday. A cold front
moves through late Monday, followed by high pressure building
in on Tuesday.

&&

.NEAR TERM /THROUGH TONIGHT/...
Severe tstm watch 385 issued for the entire area til 00Z. That
said, signals are mixed re severe wx potential especially across
the lower Hudson Valley and srn CT. One sfc trough has drifted
well to the south, with a more subtle pre-frontal trough
extending back into north central PA and accompanied by widely
sct convection, while the sfc cold front lags even farther
behind across upstate NY and western PA. A BL theta-E ridge
extends from southern NJ up into SE New England, and with
further daytime heating could expand westward into SE CT and
eastern Long Island this afternoon.

Convection with a leading short line segment over northern NJ
so far has not been very robust with reports of small hail at
most so far, but things may change going into this afternoon.
Latest HiResW guidance suggests tstms will become focused
along the pre-frontal trough to the west and move across the
NYC metro area and Long Island this afternoon, while the latest
HRRR also forecasts tstms developing to the SW to graze NYC and
Long Island. Given drier air and lack of focusing mechanism
other than sea breezes, have questions how much activity the
lower Hudson Valley and srn CT will see.

Strong convection may be confined to eastern Long Island and
perhaps SE CT after 6 PM, with a few trailing showers/tstms
possible all the way back to NYC. As N-NW flw ensues this
evening, any remaining activity should end after sunset, with
dew point readings getting down in the more comfortable upper
50s toward daybreak on Thursday, with low temps from the upper
50s well north/west to the 60s elsewhere.

&&

.SHORT TERM /THURSDAY THROUGH THURSDAY NIGHT/...
Weak high pressure will settle in on Thursday providing
comfortably warm and dry conditions. BUFKIT soundings are
suggesting some higher level moisture during the day, thus high
clouds are implied which would lead to more of a partly sunny
day. For Thursday night a deep and light NW flow at the surface
should prevail providing for dry conditions and fairly
comfortable conditions with dew point values in the upper 50s to
around 60.

&&

.LONG TERM /FRIDAY THROUGH TUESDAY/...
The long term is predominantly influenced by an upper level
trough allowing generally weak disturbances to move through
the area followed by weak high pressure systems.

Friday looks to be a comfortable day with high pressure over the
area and a dry airmass in place. A weak cold front may spark
afternoon showers/thunderstorms, but this activity will be
widely scattered so have capped PoPs at slight chance. Highs
will be in the upper 70s to mid 80s, with dewpoints in the upper
50s. Similar highs and dry conditions are expected during the
day on Saturday.

A frontal system will bring unsettled weather the second half of
the weekend into the start of the workweek. Early Sunday
southerly flow will strengthen as a disturbance lifts a warm
front through the area. This flow will bring a more humid
airmass and a chance of showers and thunderstorms. Off to our
west, a cold front extending down from a low centered well to
our north approaches the area. Showers and thunderstorms remain
in the forecast until the passage of this front sometime late
Monday. High pressure builds into the area on Tuesday with dry
conditions expected.

&&

.AVIATION /18Z WEDNESDAY THROUGH MONDAY/...
A surface trough will remain nearby today, with a cold front
moving across the area this afternoon into early this evening.
High pressure builds in from the west tonight into Thursday.

Sct TSRA thru approx 21-22z for most terminals. Additional
showers possible thru 01-02z. VFR, except lower in TSTMs.

Winds mostly NW-NNW. Strong to severe gusts in TSTMs possible.
Outside of TSTMs, winds around 10 kt for the rest of the day
with some gusts up to around 20 kt possible. Winds bcmg lighter
tonight, then NW-NNW around 10 kt Thursday.

 ...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty...

End time of TSTM threat could be off by an hour. Potential for gusts
in TSTMs to be over 50 kt.

.OUTLOOK FOR 18Z THURSDAY THROUGH MONDAY...
.Thursday...VFR. NW winds.
.Friday...Mainly VFR, with a slight chance of an afternoon and
evening shower and thunderstorm.
.Saturday...VFR.
.Saturday Night into Sunday...Chance of showers and
thunderstorms with frontal system.
.Monday...VFR.

Detailed information, including hourly TAF wind component forecasts,
can be found at: https:/www.weather.gov/zny/n90

&&

.MARINE...
Sub SCA conditions are expected on the waters through the week.
Seas will likely climb on Sunday ahead of an approaching cold
front, with an increasing chance of SCA conditions on the ocean
waters.

&&

.HYDROLOGY...
Downpours from showers and thunderstorms today may lead to
localized urban and poor drainage flooding.

&&

.TIDES/COASTAL FLOODING...
There is a low rip current risk at the ocean beaches for
Wednesday and Thursday.

Astronomical tide levels will be rising this week due to the
approach of a full moon later in the week. Isolated minor
coastal flooding is possible across the south shore back bays
possibly this evening, with a better chance towards the
Thursday evening high tides. Western CT tide locations may
also reach minor coastal flood bench marks later in the week.

&&

.OKX WATCHES/WARNINGS/ADVISORIES...
CT...None.
NY...None.
NJ...None.
MARINE...None.

&&

AVIATION...JC

Hazardous Weather Outlook
National Weather Service New York NY
357 PM EDT Wed Jul 21 2021

ANZ338-NJZ002-004-006-103>108-NYZ067>075-176-178-222000-
New York Harbor-Western Passaic-Eastern Passaic-Hudson-
Western Bergen-Eastern Bergen-Western Essex-Eastern Essex-
Western Union-Eastern Union-Orange-Putnam-Rockland-
Northern Westchester-Southern Westchester-New York (Manhattan)-Bronx-
Richmond (Staten Island)-Kings (Brooklyn)-Northern Queens-
Southern Queens-
357 PM EDT Wed Jul 21 2021

This Hazardous Weather Outlook is for Atlantic coastal waters,
northeast New Jersey and southeast New York.

.DAY ONE...This afternoon and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

No hazardous weather is expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

&&

This Hazardous Weather Outlook provides a summary of potential
widespread hazardous weather events that may reach NWS warning
criteria. Most long fused NWS watches, warnings, and advisories in
effect are highlighted.

Please refer to the latest NWS forecasts for weather not meeting NWS
warning criteria.

ANZ331-332-335-340-345-350-353-355-CTZ005>012-NYZ078>081-177-179-
222000-
Long Island Sound East of New Haven CT/Port Jefferson NY to the
Mouth of the Connecticut River-
Long Island Sound East of the Mouth of the Connecticut River-
Long Island Sound West of New Haven CT/Port Jefferson NY-
Peconic and Gardiners Bays-
South Shore Bays from Jones Inlet through Shinnecock Bay-
Moriches Inlet NY to Montauk Point NY out 20 nm-
Fire Island Inlet NY to Moriches Inlet NY out 20 nm-
Sandy Hook NJ to Fire Island Inlet NY out 20 nm-Northern Fairfield-
Northern New Haven-Northern Middlesex-Northern New London-
Southern Fairfield-Southern New Haven-Southern Middlesex-
Southern New London-Northwest Suffolk-Northeast Suffolk-
Southwest Suffolk-Southeast Suffolk-Northern Nassau-Southern Nassau-
357 PM EDT Wed Jul 21 2021

...SEVERE THUNDERSTORM WATCH 385 IN EFFECT UNTIL 8 PM EDT THIS
EVENING...

This Hazardous Weather Outlook is for Atlantic coastal waters,
southern Connecticut and southeast New York.

.DAY ONE...This afternoon and tonight.

Please listen to NOAA Weather Radio or go to weather.gov on the
Internet for more information about the following hazards.

   Severe Thunderstorm Watch.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

No hazardous weather is expected at this time that would meet NWS
warning criteria.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is requested and appreciated.

&&

This Hazardous Weather Outlook provides a summary of potential
widespread hazardous weather events that may reach NWS warning
criteria. Most long fused NWS watches, warnings, and advisories in
effect are highlighted.

Please refer to the latest NWS forecasts for weather not meeting NWS
warning criteria.

Special Weather Statement
National Weather Service New York NY
1250 PM EDT Wed Jul 21 2021

NJZ006-NYZ072-075-176-178-179-211730-
Hudson-Northern Queens-Southern Queens-New York (Manhattan)-Kings
(Brooklyn)-Southern Nassau-
1250 PM EDT Wed Jul 21 2021

...A STRONG THUNDERSTORM WILL AFFECT HUDSON...QUEENS...KINGS...NEW
YORK (MANHATTAN) AND SOUTHWESTERN NASSAU COUNTIES...

At 1249 PM EDT, a strong thunderstorm was located over Park Slope, or
near Flatbush, moving east at 35 mph.

Winds in excess of 30 mph and pea size hail are possible with this
storm.

Locations impacted include...
Jersey City, Jamaica, Flatbush, Freeport, Valley Stream, Long Beach,
Coney Island, Garden City, Lynbrook, Mineola, Woodmere, Westbury,
Rockaway Beach, Crown Heights and Kennedy Airport.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4063 7405 4067 7403 4067 7405 4066 7406
      4072 7410 4078 7374 4076 7371 4078 7365
      4078 7356 4060 7348 4056 7401
TIME...MOT...LOC 1649Z 260DEG 29KT 4067 7401

MW

Special Weather Statement
National Weather Service New York NY
1255 PM EDT Wed Jul 21 2021

CTZ005-006-009-010-NYZ070-211745-
Northern Fairfield-Southern Fairfield-Northern New Haven-Southern New
Haven-Northern Westchester-
1255 PM EDT Wed Jul 21 2021

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL FAIRFIELD...SOUTHWESTERN
NEW HAVEN AND NORTHERN WESTCHESTER COUNTIES...

At 1255 PM EDT, a strong thunderstorm was located near Bedford, or 7
miles east of Mount Kisco, moving east at 45 mph.

Wind gusts up to 50 mph and pea size hail are possible with this
storm.

Locations impacted include...
Bridgeport, New Haven, Stamford, Danbury, Milford, Shelton,
Southbury, New Canaan, Mount Kisco, Newtown, Fairfield, Greenwich,
Stratford, Trumbull and Ridgefield.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southern Connecticut...and southeastern New York.

LAT...LON 4127 7294 4110 7379 4131 7385 4135 7369
      4137 7355 4141 7354 4148 7335 4147 7331
      4149 7332 4151 7325 4151 7316 4155 7316
TIME...MOT...LOC 1655Z 254DEG 40KT 4124 7360

DS

Special Weather Statement
National Weather Service New York NY
121 PM EDT Wed Jul 21 2021

NYZ078-080-177-179-211800-
Southwest Suffolk-Northwest Suffolk-Northern Nassau-Southern Nassau-
121 PM EDT Wed Jul 21 2021

...AN AREA OF STRONG THUNDERSTORMS WILL AFFECT WESTERN SUFFOLK AND
NASSAU COUNTIES...

At 121 PM EDT, strong thunderstorms were clustered near Plainview,
moving east at 40 mph.

Winds in excess of 40 mph and pea size hail are possible with this
storm.

Locations impacted include...
Islip, Brentwood, Levittown, Freeport, Commack, Huntington Station,
Centereach, Shirley, Deer Park, Lindenhurst, Glen Cove, Plainview,
Medford, Massapequa and Hauppauge.

Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southeastern New York.

LAT...LON 4086 7366 4092 7364 4093 7352 4096 7349
      4094 7342 4097 7340 4094 7334 4095 7329
      4092 7322 4093 7317 4098 7317 4099 7313
      4097 7293 4088 7289 4086 7290 4079 7286
      4076 7287 4074 7301 4073 7302 4063 7363
TIME...MOT...LOC 1721Z 253DEG 45KT 4078 7349

DS

Special Weather Statement
National Weather Service New York NY
147 PM EDT Wed Jul 21 2021

CTZ005>007-010-011-211830-
Southern Middlesex-Northern Fairfield-Northern New Haven-Northern
Middlesex-Southern New Haven-
147 PM EDT Wed Jul 21 2021

...A STRONG THUNDERSTORM WILL AFFECT CENTRAL FAIRFIELD...NEW HAVEN
AND SOUTHERN MIDDLESEX COUNTIES...

At 147 PM EDT, a strong thunderstorm was located over Woodbridge, or
near Shelton, moving east at 30 mph.

Wind gusts up to 50 mph and half inch hail are possible with this
storm.

Locations impacted include...
New Haven, Milford, Wallingford, Shelton, Naugatuck, Guilford,
Clinton, Durham, Chester, Hamden, Stratford, Trumbull, Cheshire,
Branford and North Haven.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

A Severe Thunderstorm Watch remains in effect until 800 PM EDT for
southern Connecticut.

LAT...LON 4124 7248 4124 7254 4126 7259 4123 7276
      4125 7278 4123 7290 4125 7292 4121 7298
      4122 7311 4126 7309 4127 7311 4125 7315
      4124 7314 4123 7316 4123 7320 4147 7314
      4147 7248
TIME...MOT...LOC 1747Z 271DEG 26KT 4135 7305

DS

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE NEW YORK NY
316 PM EDT WED JUL 21 2021

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0156 PM     HAIL             HAMDEN                  41.37N 72.90W
07/21/2021  M1.00 INCH       NEW HAVEN          CT   PUBLIC

            QUARTER SIZE HAIL.

&&

Special Weather Statement
National Weather Service New York NY
428 PM EDT Wed Jul 21 2021

NYZ176>179-212115-
Northern Queens-Southern Queens-Northern Nassau-Southern Nassau-
428 PM EDT Wed Jul 21 2021

...A STRONG THUNDERSTORM WILL AFFECT QUEENS AND NASSAU COUNTIES...

At 428 PM EDT, a strong thunderstorm was located over Jamaica, moving
southeast at 30 mph.

Wind gusts up to 50 mph and pea size hail are possible with this
storm.

Locations impacted include...
Jamaica, Levittown, Freeport, Valley Stream, Long Beach, Garden City,
Massapequa, Lynbrook, Mineola, Woodmere, Westbury, Great Neck,
Kennedy Airport, Jones Beach and Forest Hills.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4057 7374 4065 7386 4067 7386 4069 7387
      4068 7390 4071 7392 4080 7377 4083 7374
      4071 7343 4065 7342 4063 7342 4062 7343
      4062 7342 4061 7342 4061 7341 4060 7341
      4057 7357
TIME...MOT...LOC 2028Z 297DEG 22KT 4071 7377

DS