Area Forecast Discussion
Issued by NWS Upton, NY
Issued by NWS Upton, NY
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800 FXUS61 KOKX 060226 AFDOKX Area Forecast Discussion National Weather Service New York NY 926 PM EST Fri Dec 5 2025 .SYNOPSIS... A weak surface trough extending north from low pressure moving off the southern Mid Atlantic coast will impact the area mainly late tonight into Saturday morning. Weak high pressure will then be over the area Saturday night into Sunday. A strong cold front will move through Sunday night. High pressure builds from the west Monday, remaining in control through Tuesday. A couple of low pressure systems pass to the north and may impact the area from the middle to late next week. && .NEAR TERM /UNTIL 6 AM SATURDAY MORNING/... Main concern for the overnight will be the development of light precipitation along a weak surface trough. The location of the surface trough appears to set up somewhere near the NYC metro/western Long Island. Some weak returns are starting to develop on radar to the south, but have had a hard time sustaining themselves as they move towards the coast. Lift remains weak and there is still some low level dry subcloud air to overcome. The type of precip remains somewhat uncertain if it does develop overnight. Coverage should be scattered, so not expecting anything widespread. Saturation is shallow, but there may just be enough convergence/lift overnight to allow for some snow grains or small snow crystals at the top of the shallow clouds. Otherwise, there is a chance of some drizzle or light rain. With surface temperatures at or below freezing, this brings the possibility of some freezing drizzle or even light rain. Recent cold temperatures and colder ground also are a concern with any light precip. Will maintain the SPS for mainly coastal areas to reflect the possibility of hazardous conditions developing overnight due to any freezing drizzle. If a more persistent area of freezing drizzle develops, a short-fused Winter Weather Advisory may be issued. Low temperatures expected to be in the 20s much of the area, though the immediate coast may remain in the low 30s. Temperatures should start rising towards daybreak, especially near the coast. && .SHORT TERM /6 AM SATURDAY MORNING THROUGH SUNDAY NIGHT/... Weak high pressure builds in from the west Saturday afternoon through Sunday morning resulting in generally dry conditions. Temps after precip ends on Sat will rise to the upper 30s/lower 40s, then fall back once again to the 20s and lower 30s. With no change in air mass for Sunday high temps should once again reach the upper 30s/lower 40s in most spots. Cold fropa Sunday night will be preceded by a chance of snow showers mainly inland and out east. Fropa should take place after midnight, with colder air starting to coming in on a gusty NW flow, and lows from the upper teens well inland to the 20s elsewhere. && .LONG TERM /MONDAY THROUGH FRIDAY/... * Some of the coldest air of the season so far moves in early next week. High temperatures Monday and Tuesday likely in the upper 20 and 30s region-wide, with morning wind chills in the single digits and teens. Arctic high pressure builds in from the west Monday, with the center moving overhead Monday night into Tuesday morning. This will usher some of the coldest air thus far this winter season. 850 mb temperatures in the -12 to -18 C range across the forecast area Monday will translate to highs in the upper 20s to lower 30s, with much of the forecast area not climbing above the freezing point (32 degrees). Low temperatures Monday night into Tuesday morning could potentially be a few degrees colder depending on how clear the skies are and how calm the winds are for optimal radiational cooling. Right now, stuck with the NBM, which is giving lows in the single digits across northern portions of the Lower Hudson Valley, teens for most other places, and 20s in NYC. The high pushes off the Northeast Coast Tuesday, allowing a warm front to approach from the southwest and low pressure to move across the Great Lakes and pass north of the area Tuesday night into Wednesday morning. Therefore, dry conditions are in store from Monday through Tuesday, with just a slight chance of precipitation for portions of the forecast area Tuesday night. The warm front may lift north during the day Wednesday as another fast moving low pressure system approaches from the west, farther south than the previous one. This too is expected to pass north, rounding the base of the upper trough that is in place Wednesday night. This may give the region a better chance for precipitation Wednesday into Thursday, but it looks to be light. The associated cold front looks to push through Wednesday night, allowing high pressure to build in for Thursday. Another quick moving system approaches from the west late in the week, but there is a great deal of uncertainty among the models as to the track and strength of the low. Warmer, but still well below normal temperatures expected for Wednesday, with highs in the upper 20s to around 40 across the area (warmer for coastal areas). Near normal temperatures on Wednesday with the warm frontal passage, but then slightly cooler for Thursday with the cold frontal passage. && .AVIATION /03Z SATURDAY THROUGH WEDNESDAY/... A weak surface trough shifts across the terminals tonight into early Saturday, followed by weak high pressure Saturday afternoon and night. Mainly MVFR ceilings expected for the rest of tonight into Saturday morning. There is a chance of light snow or flurries late this evening into the overnight. However, there remains uncertainty on precipitation type due to shallow nature of the moisture. This leads to the chance for some freezing drizzle or light freezing rain. A light glaze of ice is possible if any freezing drizzle were to occur. Ceilings may also lower to IFR at times in any of the light precipitation, and also may briefly prevail early Saturday morning. Any precip should shift east of the NYC metro terminals after 12-14z, and then end by midday for KGON. Improving conditions to VFR expected by Saturday afternoon, taking longest at KGON. Light NE winds around 5 kt to start become light and variable overnight. Light flow continues Saturday morning, becoming WSW-W under 10 kt in the afternoon and evening. ...NY Metro (KEWR/KLGA/KJFK/KTEB) TAF Uncertainty... Uncertainty remains with exact precipitation type overnight/early Saturday morning. There is a chance the PROB30 for -SN ends up being -FZDZ or -FZRA earlier than currently indicated in TAF. Chance of IFR ceilings after 09z. .OUTLOOK FOR 00Z SUNDAY THROUGH WEDNESDAY... Saturday Night: VFR. Sunday: Mainly VFR. Slight chance of MVFR and light rain/snow mix at night. Monday: VFR. NW-N gusts 20-25 kt. Tuesday: VFR. SW gusts 15-20 kt in the afternoon/evening. Wednesday: Chance of rain with a chance of rain/snow interior Lower Hudson Valley. S-SW gusts 20-25kt possible. Detailed information, including hourly TAF wind component forecasts, can be found at: https:/www.weather.gov/zny/n90 && .MARINE... Sub-SCA conditions through the weekend with a weak pressure gradient over the waters. SCA conditions are possible through much of next week beginning Monday as multiple low pressure systems could impact the area. && .HYDROLOGY... No hydrologic impacts are expected at this time. && .TIDES/COASTAL FLOODING... Water levels may touch minor flood thresholds with the Saturday morning late morning/midday high tide cycle in spots along the back bays of Nassau and Queens, tidal waterways of NE NJ, the SW CT coastline, and at Shinnecock and Montauk out east. A coastal flood statement may eventually be issued to address this. && .CLIMATE... High temps for Dec 5 may be close to daily record low maxes at KEWR/KLGA/KJFK. Record Low Maximum Temperatures: KEWR: 31/2002 KBDR: 28/2002 KNYC: 22/1886 KLGA: 32/2002 KJFK: 33/2007 KISP: 30/2002 && .OKX WATCHES/WARNINGS/ADVISORIES... CT...None. NY...None. NJ...None. MARINE...None. && $$ SYNOPSIS...JP/MW NEAR TERM...DS/MW SHORT TERM...MW LONG TERM...JP AVIATION...DS MARINE...JP/MW HYDROLOGY...JP/MW TIDES/COASTAL FLOODING... CLIMATE...