059
FXUS61 KBUF 220808
AFDBUF

Area Forecast Discussion
National Weather Service Buffalo NY
408 AM EDT Wed May 22 2024

.SYNOPSIS...
Another unseasonably mild day today with a greater chance of showers
and thunderstorms as a cold front approaches the region. Some of
these storms may be strong with gusty winds possible and heavy rain.
Cooler more comfortable weather can be expected Thursday into the
first part of the Memorial Day weekend.

&&

.NEAR TERM /THROUGH TONIGHT/...
Sfc ob`s show temps in the 60s to around 70F as of 08Z with mostly
clear skies across WNY. Some clouds can be observed east of Lake
Ontario. Still plenty of sunshine expected with active weather
anticipated today. Details can be found below...

SPC has expanded the slight risk for severe weather today which
encompasses all of Western and North Central NY.

All the ingredients appear to be coming together for an active
weather day today with strong to severe storms possible. Diurnal
heating ahead of an approaching cold front will push temperatures
well into the 80s near 90F by this afternoon. As the heat
builds...so will SBCAPE values which will near 2000 j/kg. Increasing
shear profiles also suggest the potential for damaging winds and
hail, with even a small corridor of enhanced low level helicity
across southwest New York possibly favoring a few rotating cells.
Additionally...with PW values in the range of 1.75" to 2.00" any of
the stronger cells will `likely` have the potential to produce very
heavy rain. While flash flooding isn`t the main concern it can`t be
ruled out. That being said...the HRRR and most mesoscale guidance
brings convection into Western NY between 1-3 p.m with the arrival
of the pre-frontal trough. A well developed line of storm is then
advertised to move eastward into the eastern Lake Ontario region
after 5 p.m.

After this first wave of storms moves east...a secondary batch of
less developed storms is possible just ahead and along the cold
front this evening into tonight. Showers and storms will exit to our
east overnight or by early Thursday morning and then we should see
dry quiet weather return to the region.

&&

.SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/...
Thursday, some showers will linger into the first half of the
morning, mainly for areas east of Lake Ontario. Clouds will decrease
from northwest to southeast as drier air moves into the region
behind the departing cold front. A cooler, but still above
normal day on Thursday with afternoon highs mainly in the upper
60s to upper 70s from the higher terrain to the lower elevations
respectively.

Thursday night, fair dry weather will continue through the night as
a ridge approaches, and as the region remains sandwiched between
synoptic systems on the north and southeast sides. Lows on Thursday
night will dip down to the low to mid 50s across the entire area.

Dry conditions continue through the day on Friday as a ridge axis
slowly approaches from the west. Temperatures will range from near
70 over the higher terrain east of Lake Ontario to the upper 70s and
low 80s for the lower elevations south of Lake Ontario.

Friday night, the ridge will continue to slowly approach and cross
the region. Behind the passing ridge, a warm front approaching from
the Ohio Valley will start to increase the potential for showers
during the second half of the night. There is some timing
uncertainty among guidance with the speed of the ridge crossing the
region. Some models have the ridge moving through slower and showers
not moving in until later in the day on Saturday, while other
forecast guidance is a bit quicker with the showers moving into SW
NY a few hours before daybreak. Temperatures Friday night will be in
the low 50s to near 60.

&&

.LONG TERM /SATURDAY THROUGH TUESDAY/...
Showers move into the area on Saturday as a few troughs track over
the Great Lakes and southeast of the region. There is the potential
that the showers over the forecast area are more scattered than
thought the past few days. Guidance is starting to show some
potential breaks in the showers for Saturday as the main batches of
showers are closer to the troughs to the northwest and south.
Guidance is also showing both the ridge and troughs all
deamplifying, resulting in less forcing and some lowering potential
for more organized showers for the day on Saturday. With daytime
heating, there will be the potential for a few thunderstorms as well
on Saturday.

Fair conditions expected for Sunday as high pressure and a ridge
quickly tracks across the region.

The next round of showers approaches late Sunday night/Monday
morning as a warm front, sfc low and trough slowly track toward and
across the region. The weather remains showery through at least the
rest of the long term period as these features cross the region.

Temperatures for the period will be in the low 70s to mid 80s to
start on Saturday. Day-to-day cooling will end the period on Tuesday
with afternoon high temperatures in the low 60s to low 70s.

&&

.AVIATION /08Z WEDNESDAY THROUGH SUNDAY/...
VFR to continue at all area terminals through this morning.

A cold front will near the region today bringing increasing chances
for showers and thunderstorms. Some of these storms could become
strong to severe producing strong gusty winds, hail, and very heavy
rain. With any of the showers or storms brief restrictions will be
possible at area terminals.

Showers and storms will continue into this evening and tonight as
the cold front arrives and then works east through the area.

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

&&

.MARINE...
Modest south to southwest winds will develop today but conditions
will likely remain below small craft levels. That said...a cold
front will approach from the west with showers and thunderstorms
blossoming this afternoon through this evening. Some of the stronger
storms will have the potential to produce strong gusty winds and
hail.

With the frontal passage tonight showers and storms will diminish
from west to east. After that...surface high pressure will build
into the region for Thursday providing light winds and minimal wave
action as we head towards the Memorial day weekend.

&&

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

&&

$$

SYNOPSIS...AR
NEAR TERM...AR/Apffel
SHORT TERM...SW
LONG TERM...SW
AVIATION...AR
MARINE...AR