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Area Forecast Discussion
Issued by NWS Buffalo, NY
Issued by NWS Buffalo, NY
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792 FXUS61 KBUF 061024 AFDBUF Area Forecast Discussion National Weather Service Buffalo NY 624 AM EDT Sat Jul 6 2024 .SYNOPSIS... A cold front will push east of the area today, ushering in slightly cooler and less humid weather for the remainder of the weekend. A few showers and thunderstorms are possible at some locations today, but then high pressure will build in and bring fair weather to the entire region tonight through Monday night. The next chance for showers and thunderstorms will be Tuesday and Wednesday when a trough of low pressure moves across the area. && .NEAR TERM /THROUGH TONIGHT/... A mid-level trough across the Great Lakes will weaken and eventually flatten out today. Meanwhile, a weakening cold front will quickly sweep from west to east across the region this morning. The departing frontal boundary and mid level trough will maintain a risk for some showers and thunderstorms today, mainly east of Lake Ontario and the Western Finger Lakes regions. Southwesterly winds behind the front will provide a rain- free lake shadow for the Niagara Frontier today, although winds will gust to around 30 mph. The weak boundary will result in slightly cooler and less humid weather today, with highs in the upper 70s to mid 80s and dew points dropping into the mid 60s this afternoon. Tonight, high pressure centered near Ohio will ridge into our region, providing fair weather and mostly clear skies. Good radiational cooling conditions will allow temperatures to drop into the mid to upper 50s across the Southern Tier where some river valley fog is possible. && .SHORT TERM /SUNDAY THROUGH MONDAY NIGHT/... Surface high pressure will pass across our region Sunday, with light winds and comfortable levels of humidity. Developing lake breeze circulations through the afternoon will build a little cumulus, but shortwave ridge axis over our region and lacking deep moisture should keep the day dry. Pleasant sleeping conditions for Sunday night with lows dropping back into the upper 50s interior higher spots, to low/mid 60s closer to the Lakes and through the Finger Lakes. Monday the surface ridge will advance to the east, with a southerly return flow aloft developing through the day. Though dewpoints will begin to creep upwards, they will still remain fairly comfortable, save for the Finger Lakes/Southeast of Lake Ontario region where the axis of low level moisture will push dewpoints into the mid to upper 60s. However the advection of a warmer airmass (850 hPa temperatures in the mid to upper teens Celsius) and a fair amount of sunshine will bring afternoon highs back into the mid 80s to around 90F. Though Monday should remain dry, the increasing moisture may bring a shower or two Monday night to the Finger Lakes/Southeast of Lake Ontario. Monday night will also return back to the mugginess, with overnight lows in the mid 60s to lower 70s. && .LONG TERM /TUESDAY THROUGH FRIDAY/... Tuesday and Tuesday night will likely be the most active timeframe for this period as a mid level trough approaches our region, sending a plume of deeper moisture across our region that will enhance showers and thunderstorms Tuesday afternoon and overnight. The continued northward advection of warmth and moisture out ahead of this system will send PWATs back up to between 1.5 and 2.0 inches during Tuesday...and this in tandem with daytime heating and increasing large-scale ascent will support the likelihood of another round of showers and thunderstorms...with the best chances for these likely coming between Tuesday afternoon and evening. Otherwise it should be very warm and humid again before the convection arrives on Tuesday...with highs generally ranging through the 80s and surface dewpoints running between 65 and 70. Latest model consensus supports the initial trailing cold front from this system crossing our area Tuesday night...with a weaker secondary boundary then following suit during Wednesday. Coupled with broad troughing aloft...this may allow some additional scattered showers/isolated storms to persist through Wednesday. Otherwise cooler and more comfortable air will filter back across our region following the passage of the above cold fronts...with highs Wednesday pulling back to the upper 70s/lower 80s...and lows Wednesday night dipping back into the upper 50s to mid 60s. After that...high pressure looks to build across the region Thursday...before sliding out across New England on Friday. This will result in generally dry weather to close out the work week... with continued comfortable temperatures Thursday/Thursday night giving way to warmer readings on Friday. && .AVIATION /10Z SATURDAY THROUGH WEDNESDAY/... A cold front will move east of the area by late this morning. Mainly VFR flight conditions this morning, but there will be areas of IFR cig, mainly across the Western Southern Tier and KJHW area. These will lift and scatter out this afternoon when drier air builds into the region. Widespread VFR flight conditions this afternoon which will last through at least this evening. High pressure ridges into the region late tonight with patchy river valley fog likely in the Southern Tier, and VFR elsewhere. Outlook... Sunday and Monday...VFR. Tuesday...Restrictions possible with showers and thunderstorms likely. Wednesday...Restrictions possible with a chance of showers and thunderstorms. && .MARINE... Winds will pick up today, following the passage of a cold front. Conditions will approach small craft criteria on Lake Erie today, with southwesterly winds increasing to 15 to 20 knots at times this afternoon. Elsewhere winds pick up but will remain below sca criteria. High pressure will build over the lower Great Lakes Sunday and into the start of next week. This will bring a period quiet conditions through mid week with a weak pressure gradient favoring light winds and limited waves. The light flow will allow for some local lake breezes to form each day. && .BUF WATCHES/WARNINGS/ADVISORIES... NY...None. MARINE...None. && $$ SYNOPSIS...Apffel NEAR TERM...Apffel SHORT TERM...Thomas LONG TERM...JJR/Thomas AVIATION...Apffel/HSK MARINE...Apffel/TMA