New York Harbor Marine Forecast
|Overnight...W Winds 5 To 10 Kt, Becoming Nw. Waves 1 To 2 Ft. Slight Chance Of Showers.|
|Wed...N Winds 5 To 10 Kt, Becoming E In The Afternoon. Waves 1 To 2 Ft In The Morning, Then 1 Ft Or Less.|
|Wed Night...Se Winds 5 To 10 Kt. Waves 1 Ft Or Less.|
|Thu...Se Winds 5 To 10 Kt. Waves 1 Ft Or Less. Chance Of Showers And Tstms In The Afternoon.|
|Thu Night...S Winds 5 To 10 Kt, Becoming W After Midnight. Waves 1 Ft Or Less. Chance Of Tstms In The Evening. Chance Of Showers.|
|Fri...Nw Winds Around 10 Kt. Waves 1 Ft Or Less.|
|Fri Night...Nw Winds 10 To 15 Kt. Waves 1 Ft Or Less.|
|Sat...W Winds 5 To 10 Kt. Waves 1 Ft Or Less.|
|Sat Night...Sw Winds Around 5 Kt. Waves 1 Ft Or Less.|
|Sun...Sw Winds 5 To 10 Kt. Waves 1 Ft Or Less.|
|Sun Night...W Winds 5 To 10 Kt With Gusts Up To 20 Kt. Waves 1 Ft Or Less. Winds And Waves May Be Higher In And Near Tstms.|
| 1043 PM EDT Tue Jul 27 2021 |
Synopsis for the Long Island Waters and New York Harbor - ANZ300
A cold front moves across the waters tonight. High pressure builds in for Wednesday, and moves east of the waters Wednesday night. A warm front will approach from the south on Thursday, followed quickly by a cold frontal passage Thursday night. The front will linger to the southeast on Friday, then high pressure will follow for the end of the week and into the first half of the weekend before another frontal boundary approaches by early next week.
| Area Forecast Discussion|
National Weather Service New York NY
855pm EDT Tuesday July 27 2021
A cold front moves through the region tonight. High pressure builds in for Wednesday, and moves off the northeast coast Wednesday night. A warm front will approach from the south on Thursday, followed quickly by a cold frontal passage Thursday night. The front will linger to the southeast on Friday, then high pressure will follow for the end of the week and into the first half of the weekend before another frontal boundary approaches by early next week.
Near Term - Until 6am Wednesday Morning
Weakening convection moving east through SE CT this evening with gust front pushing through LI. Convection over NE PA is weakening as it sinks se towards NYC/NJ metro with waning instability, but potential for lingering shower activity across this area this evening. Thunderstorms threat appears over in stabilized environment. Improving conds after midnight as shortwave energy moves east of the region.
Short Term - 6am Wednesday Morning Through Wednesday Night
Will keep Wednesday and Wednesday night dry as the upper trough axis will be east of the region and heigheights will be rising through Wednesday, with surface high pressure dominating. Another shortwave will be approaching late Wednesday night, toward 12Z Thursday along with a surface warm front. Lift will be beginning to increase toward morning across the far western zones and will have slight chance probabilities.
Long Term - Thursday Through Tuesday
A warm front slowly approaches from the south on Thursday, followed by a cold front late Thursday into the evening. Showers/tstms will be likely Thu afternoon/evening especially from NYC west in the afternoon, spreading east into Long Island and southern CT.
The front should clear the area later Thursday night and stall nearby on Friday while most of the associated deep moisture continues moving east. Friday should be mainly dry with the exception of some leftover early morning showers/tstm across the east end.
As a closed upper low moves across Quebec and far northern New England Friday night into Saturday, the front should get a push farther south/east, with a shot of Cold Air Advection making for a cooler night Friday night as high pressure builds in.
The high should be in control from Friday night into at least Saturday night/Sunday morning. Timing of the next frontal system to impact the area is questionable, so both Sunday/Monday carry diurnal chance Probability of Precipitation for showers/tstms. High pressure builds back across the region on Tuesday.
Temperatures Friday night will be in the mid 50s to mid 60s which is below normal for this time of year. High temperatures through the period should be a slightly below normal through Saturday, then bounce back to near normal Sunday and into the beginning of the week with nighttime temperatures near normal.
Winds and seas will remain below SCA (Small Craft Advisory) levels tonight through Wednesday night as a cold front passes through the waters tonight, followed by high pressure.
Sub SCA (Small Craft Advisory) conditions expected through the extended period. Wind gusts in S-SW flow could approach 20 kt late Thursday night ahead of a weak cold frontal passage. Winds could also gust up to 20 kt with seas up to 4 ft on the ocean Friday night in NW post-frontal flow.
Minor flood threat over with this evening convection.
No hydrologic impacts are expected Thursday through early next week.
Tides / Coastal Flooding
A moderate risk of rip current development is forecast for the ocean beaches Wednesday due to a combo of 2 ft S and SE swell. 2 to 3 ft S wind waves and residual 1 ft se swell point towards a moderate risk once again on Thursday.
NOAA New York NY Office: Watches - Warnings - Advisories
CT...None. NY...None. NJ...None. MARINE...None.