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762
FXUS61 KBUF 231707
AFDBUF

Area Forecast Discussion
National Weather Service Buffalo NY
107 PM EDT Thu May 23 2024

.SYNOPSIS...
Behind a passing cold front, cooler and more comfortable
temperatures are expected into the weekend. High pressure moving
into the region will provide for fair weather today and Friday. On
and off periods of showers and thunderstorms through the holiday
weekend with Sunday expected to be mostly dry and pleasant weather.
Showers on Monday will linger into the middle of the coming week.

&&

.NEAR TERM /THROUGH FRIDAY/...
Clouds will decrease from west to east with increasing sunshine as
drier air moves into the region behind the departing cold front. An
elongated area of high pressure stretching from Canada will also
start to push into the region. A cooler, but still above normal day
today with afternoon highs mainly in the upper 60s to near 80 from
the higher terrain to the lower elevations respectively.

Tonight, fair weather conditions expected to continue as high
pressure continues over the area and a ridge approaches from the
west. Clear skies and refreshing temperatures overnight in the low
to mid 50s expected for the entire area. Overnight winds will be
limited to around 5 mph out of the southwest.

Friday, fair weather conditions expected once again as the ridging
increases and the ridge axis starts moving into the far western
portions of the area by later in the day. Temperatures will warm
some over the western counties as warm air advection bumps
temperatures up into the upper 70s to low 80s. Farther east, where
warm air advection doesn`t start till later, afternoon highs will be
similar to today, with temperatures in the mid 60s to mid 70s from
the higher terrain to lower elevations respectively.

&&

.SHORT TERM /FRIDAY NIGHT THROUGH SUNDAY/...
It will be dry and tranquil to start the long holiday weekend...as a
progressive ridge will pass over the Lower Great Lakes...while sfc
high pressure will nose south from Hudson Bay.

As the aforementioned ridge scoots off to our east Saturday and
Saturday evening though...a flat shortwave trough will accompany a
warm front that will likely generate some showers and possible
thunderstorms. The bulk of this activity should take place between
late morning and sunset...right when most people have their outdoor
gatherings for the start of the holiday weekend.

A few leftover showers early Saturday night will then be supported
by a weak cold front that will follow through the region on the
heels of the previously mentioned warm front. The good news is that
the trend will be for notably nicer weather as we head into Sunday.

On Sunday...another wedge of high pressure will extend southwards
across the region. This should nearly guarantee fair dry weather
with comfortable conditions for outdoor activities including high
temperatures that will be largely in the 70s with minimal humidity.
This will prove to be the nicest day of the three day weekend.

&&

.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
-- Changed Discussion --
Sunday night and Monday a warm front will lift across the region,
bringing a return to a more humid airmass. Lift along the front,
combined with diffluent flow aloft ahead of a mid level shortwave
will bring a period of rain to end the Memorial Day holiday weekend.

This diffluent flow and copious amounts of moisture (PWATS 1.5 to
1.75) could allow for heavier downpours of rain within
thunderstorms.

A cold front Monday night will continue showers for our region.
Moisture wrapping around the initial shortwave may linger these
showers into Tuesday.

Warm southerly breezes Monday will be replaced by cooler westerly
breeze for Tuesday.

A shortwave ridge may bring a less active day Tuesday before a
second shortwave deepening a longwave trough over our region
continues chances for showers through at least Wednesday if not
Thursday.

Temperatures at 850 hPa will lower to around zero Celsius, and
possibly below zero across Lake Ontario and points eastward
Wednesday and Thursday. This cold air flowing over the now milder
lakes may bring lake clouds or even some lake enhanced rain.
-- End Changed Discussion --

&&

.AVIATION /17Z THURSDAY THROUGH MONDAY/...
A quiet day with fair weather for the rest of the area. VFR
conditions expected for all areas for the entire day. Winds out of
the west to southwest should remain at or below 15 mph, with some
gusts to 20 mph possible.

Tonight, VFR with fair weather for all TAF sites. Winds expected to
be 10 mph or less.

Outlook...
Friday...Mainly VFR.
Saturday...VFR/MVFR with a chance of showers and thunderstorms.
Sunday...Mainly VFR
Monday...MVFR/VFR with showers and thunderstorms.

&&

.MARINE...
High pressure will build into the region through Friday, providing a
gentle breeze. Winds will generally remain at a gentle breeze or
lighter through most of the weekend as a shortwave trough crosses
the area on Saturday and high pressure moves back into the region on
Sunday. There could be some brief stronger convective related gusts
on Saturday.

&&

.BUF WATCHES/WARNINGS/ADVISORIES...
NY...None.
MARINE...None.

&&

$$

SYNOPSIS...SW/TMA
NEAR TERM...SW/TMA
SHORT TERM...RSH
LONG TERM...Thomas
AVIATION...SW/TMA
MARINE...SW/TMA