Area Forecast Discussion
Issued by NWS Albany, NY

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000 FXUS61 KALY 251415 AFDALY AREA FORECAST DISCUSSION National Weather Service Albany NY 1015 AM EDT Sat Jun 25 2022 .SYNOPSIS...
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Mostly sunny, hot and more humid weather is expected over the weekend with high temperatures in some valley areas reaching the 90s, especially on Sunday. A cold front will bring showers and a few thunderstorms Sunday night into Monday. Cooler, drier and less humid weather returns later Monday into midweek.
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.UPDATE...As of 1015 AM EDT, just some minor tweaks to temps based on observations and then weather to remove morning fog as it has burned off. Most of the forecast area is clear at this time. Temperatures have risen into the 70s to around 80. A beautiful, warm summer day expected to continue. Previous Discussion: The combination of an upper-level ridge and surface high pressure at the surface will yield a mostly sunny and dry start to the weekend. 850 hPa temperatures will rise another 2C or so today compared to yesterday, so this should yield high temperatures to run about 4 to 6 degrees F higher than on Friday. This results in values ranging from the upper 70s to lower 80s in the higher elevations to the mid-80s to around 90 in the valleys. It will not feel too humid today as dewpoints hover in the mid-50s to around 60, though winds will be on the light side. A continued clear sky with light to calm winds will aid in another good radiational cooling night and as a result, undercut the NBM numbers a bit, given it will be a similar setup to this morning, when numbers in many areas went a bit below guidance. There could be some localized patchy fog but it should be rather sparse, so will not include in the forecast at this time. Lows look to dip into the mid to upper 50s across the higher elevations to the low to mid-60s in the valleys.
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&& .SHORT TERM /SUNDAY THROUGH MONDAY NIGHT/... Surface high pressure will shift to the east on Sunday, though upper-level ridging will hold strong. Overall, another dry and hot day is expected with a slight increase in humidity levels and with a southerly breeze. 850 hPa temperatures increase a bit more, though the question remains how the low-level winds will impact temperatures. NBM is on the higher end of guidance with other MOS members slightly lower. In hot southerly wind regimes this season, NBM temperatures have been overdone, so we did a slight decrease in highs compared to the previous forecast. If the surface winds can get a little more southwesterly component, then we could rise a bit more, but that is uncertain at this time. Still, we are looking at highs mainly in the upper 70s to mid-80s in the valleys to the upper 80s to lower 90s in the valleys. With the slight lowering in highs, we continue to fall short of heat advisory levels (which is 95F or above). A surface cold front will approach from the west late in the day and through Sunday night. Instability will be on the low side (500-1000 J/kg) and mainly confined to areas west of the Hudson River and in the evening hours before waning overnight. Upper- level support is lacking, however, as the main upper-level trough will be way back across the upper Great Lakes and with weak 0-6km shear (less than 30 kt). Still, enough lift ahead of the front will result in occasional showers and a few thunderstorms, but not expecting any strong to severe storms. Precipitable water values will increase Sunday night into the 1.50 to 2.00 inch range, however, and forecast soundings show a thin, skinny cape and a warm cloud depth, so some heavier downpours can occur in places. Overall, this will be a much needed rainfall for many areas with little or no hydrological issues. With the clouds and showers, lows will only dip into the upper 50s to upper 60s. The surface cold front will progress eastward on Monday with showers and embedded rumbles of thunder gradually ending from west to east. In its wake, a cooler and drier air mass will build into the area for the rest of the day and for Monday night. A westerly breeze will also pick up behind the front with a few gusts 20-30 mph possible. Highs will only top out in the mid-60s to upper 70s. It will turn cool Monday night with lows in the mid-40s to mid-50s. && .LONG TERM /TUESDAY THROUGH FRIDAY/... Guidance is in agreement with a broad upper level ridge across the southern tier of the CONUS through the period with flattening fast flow across the northern tier of the CONUS. While at the surface, high pressure is expected to dominate across the region much of the week resulting in fair weather Tuesday through Thursday. A cold front is expected to be on the approach from the Great Lakes Region Friday bringing our next chances for some rain to the area as the Hudson`s Bay upper low shifts southward. Temperatures will warm as the week progresses. Seasonable readings are expected by Wednesday with above normal readings developing to close out the work week. Highs Friday are anticipated to be in the 80s with some lower 90s possible up the Hudson River Valley with mid and upper 70s limited above 1500 feet. Nights will become milder and more humid as the week progresses. && .AVIATION /14Z SATURDAY THROUGH WEDNESDAY/... Through 12Z/Sunday...Any remaining fog will lift and burn off quickly early this morning. Mainly clear skies and very light winds expected today as ridging dominates at the surface and aloft. Conditions will once again become favorable for the development of radiational fog tonight under clear skies with calm winds as temperatures cool. Fog is expected to occur at KGFL and KPSF by around 05Z, at KPOU by around 08Z and it is not expected to form at KALB. Conditions will begin to improve by around 11Z/Sunday. Outlook... Sunday Night: High Operational Impact. Definite SHRA...TSRA. Monday: Moderate Operational Impact. Breezy. Likely SHRA. Monday Night: Low Operational Impact. Breezy. NO SIG WX. Tuesday: No Operational Impact. NO SIG WX. Tuesday Night: No Operational Impact. NO SIG WX. Wednesday: No Operational Impact. NO SIG WX. Wednesday Night: No Operational Impact. NO SIG WX. Thursday: No Operational Impact. NO SIG WX. && .FIRE WEATHER... Mainly dry and hot weather is expected for the majority of the weekend. A passing cold front will bring showers and a few thunderstorms late Sunday into Monday. Drier air returns on Tuesday. RH values will lower to 35 to 50 percent percent Saturday and Sunday afternoon, with nighttime recovery to 90-100 percent. Winds will be generally less than 10 mph today, then become southerly Sunday at 10-20 mph. && .HYDROLOGY... Mainly dry and hot weather is expected this weekend, then a cold front will bring showers and a few thunderstorms to the area from late Sunday into Monday. Rainfall amounts of 0.25 to 0.75 of an inch will be common with perhaps a few localized higher amounts. Overall, we are expecting little to no hydrological issues with this rainfall with only minor river responses. Mainly dry weather will follow on Tuesday. For details on specific area rivers and lakes, including observed and forecast river stages and lake elevations, please visit the Advanced Hydrologic Prediction Service /AHPS/ graphs on our website. && .ALY WATCHES/WARNINGS/ADVISORIES... CT...None. NY...None. MA...None. VT...None. && $$ SYNOPSIS...SND/Rathbun NEAR TERM...SND/Rathbun SHORT TERM...Rathbun LONG TERM...IAA AVIATION...IAA FIRE WEATHER...Rathbun HYDROLOGY...Rathbun is the U.S. government's official web portal to all federal, state and local government web resources and services.