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000
FXUS61 KBUF 170304
AFDBUF

Area Forecast Discussion
National Weather Service Buffalo NY
1104 PM EDT Tue Apr 16 2024

.SYNOPSIS...
High pressure over the region will shift east tonight. Showers and
some thunderstorms will return Wednesday into Thursday as a broad
area of weakening low pressure passes by to our northwest sending a
warm front through the region Wednesday, followed by a cold front
Wednesday night into Thursday.

&&

.NEAR TERM /UNTIL 6 PM WEDNESDAY EVENING/...
Partly cloudy skies across the western & north central NY area with
high clouds slowly filling in from west to east. Current
temperatures are in the low 40s to mid 50s. Cooler temperatures are
across the east in areas where cloud cover is minimal to clear.
Further west, where there is a bit more cloud cover and some warm
air advection starting, temperatures are warmer.

A highly amplified upper level ridge will nudge east over the lower
Great Lakes tonight, maintaining dry weather for most if not all of
the night tonight with a gradual increase in clouds overnight. The
exception may be across far southwest New York toward Wednesday
morning as the leading edge of a band of showers associated with a
warm front extending well east of an area of low pressure moving
east across the upper Mississippi Valley approaches from the west.
Lows will range from the lower to mid 30s across the North Country
to the lower and mid 40s across far western New York.

Shower chances ramp up Wednesday starting in the morning across
western New York, reaching the Finger Lakes by afternoon as a
distinct surge of moisture and ascent in advance of a warm front
works into the area during this time frame. Some embedded
thunder or at least a rumble or two is possible during the
morning as elevated portion of the activity works through. There
will be a better chance for thunderstorms during the later part
of the afternoon, especially across western New York as a
pocket of modest instability develops with the emerging warm
sector.

&&

.SHORT TERM /6 PM WEDNESDAY EVENING THROUGH FRIDAY NIGHT/...
A weakening low pressure crossing the upper Great Lakes will send a
pair of front through the eastern Great Lakes Wednesday night into
Thursday morning. We will see some showers which may produce a few
rumbles of thunder as the fronts work from west to east through the
region. A slow drying trend will take place by Thursday afternoon
behind the fronts as a dry slot works into the region. This will be
followed by a brief mid-level ridge advertised to work through the
region Thursday night ahead of the next upstream trough rapidly
approaching the Lower Lakes.

A strong cold front is advertised to track through the forecast area
Friday with an area of showers working through the forecast area.
CAA will ramp up in its wake with a colder air mass wrapping in
within the west-northwest cyclonic flow. Another dry slot will bring
a brief abrupt end to any remaining showers Friday night for most
locales.

&&

.LONG TERM /SATURDAY THROUGH MONDAY/...
A cold front will cross the area during the morning on Saturday,
causing additional showers into the afternoon. Behind this passing
front, a large area of high pressure will drop southeast across the
plains and dominate most of the eastern half of the CONUS. This will
result in mainly dry conditions from Saturday night through at least
early Monday night.

A potent trough will drop southeast across the Great Lakes Monday
night into Tuesday, within the larger scale troughing pattern that
will be in place. This will increase the potential for another round
of showers Tuesday into Tuesday night as a a weak sfc low and cold
front round the base of the larger trough.

Temperatures during the entire long term period will start out below
normal with highs in the mid 40s to low 50s for the weekend.
Temperatures will warm to near and a few degrees above normal for
Monday and Tuesday with highs in the lows 50s to mid 60s, with
Tuesday being the warmer of the two days.

&&

.AVIATION /03Z WEDNESDAY THROUGH SUNDAY/...
Widespread VFR conditions and mainly light winds will be the rule
through 12z Wednesday as high pressure slowly shifts into New
England. Mid and upper level cloud will start to thicken and
lower across western New York late tonight ahead of warm front
set to move into western New York on Wednesday. Low VFR CIGS and
a few scattered rain showers may reach KJHW toward 12z Wednesday.

Flight conditions should deteriorate Wednesday, especially across
western NY, where MVFR CIGS and some rain showers will be possible.
An embedded thunderstorm is possible, but confidence low on the
extent of western New York airfields impacts.

Outlook...

Wednesday night and Thursday...MVFR/VFR with showers likely.
Friday and Saturday...MVFR/VFR with a chance of showers.
Sunday...Mainly VFR.

&&

.MARINE...
High pressure over the lower Great Lakes will slide east tonight.
Winds will turn easterly and increase later tonight and Wednesday
with Small Craft Advisory conditions expected along portions of Lake
Ontario, especially on the western end ahead of an approaching warm
front.

Winds turn more southerly on both Lakes behind the warm front by
Thursday.

&&

.BUF WATCHES/WARNINGS/ADVISORIES...
NY...None.
MARINE...Small Craft Advisory from 4 AM Wednesday to 2 AM EDT Thursday
         for LOZ042-043.

&&

$$

SYNOPSIS...JM/TMA
NEAR TERM...JM/SW/TMA
SHORT TERM...AR
LONG TERM...SW
AVIATION...JM/TMA
MARINE...JM/TMA