023
FXUS61 KBUF 302112
AFDBUF

Area Forecast Discussion
National Weather Service Buffalo NY
512 PM EDT Tue Apr 30 2024

.SYNOPSIS...
Lingering showers will taper off from west to east by this
evening. Fair dry weather will then return tonight and persist
through at least Friday morning. Meanwhile, temperatures will
remain solidly above normal for the foreseeable future.

&&

.NEAR TERM /THROUGH WEDNESDAY NIGHT/...

The showers (and possibly an isolated thunderstorm) will
continue to taper off from west to east later this afternoon and
early evening. While the showers will come to an end...a light
flow aloft will enable much of the cloud cover to persist for
the greater part of tonight. The exception to this will be
across the Southern Tier where clearing seen on VSB/IR imagery
over northwest Ohio should make its way into the area.

The clearing will continue Wednesday morning...as a progressive mid
level shortwave ridge and associated weak sfc high will cross our
forecast area. The fair dry weather on Wednesday will be
accompanied by max temps that will range from the mid 60s across the
Eastern Lake Ontario region to the low and mid 70s over the western
counties.

A compact shortwave will pass by to our north Wednesday night. This
will drive a moisture starved cold front through our region. While
there will be slgt to low chc pops near and east of Lake Ontario...
the passage will be marked by nothing more than patchy clouds and
subtle wind shift to mark the occasion.

&&

.SHORT TERM /THURSDAY THROUGH FRIDAY NIGHT/...
The period will start out mostly dry as a ridge builds into the
region from the west on Thursday. There may be a few showers across
the north country as weakening sfc low and trough pass by the area
on Thursday morning. Dry weather is expected through most of Friday
afternoon before an area of showers approaches from the west.

A large occluding sfc low tracking northeast into western Ontario
from the upper Midwest on Friday into Saturday will push a cold
front toward the region late Friday. A new weaker sfc low will
develop over the Tennessee/Ohio Valleys and track northeast along
the cold front. Showers will increase from west to east later Friday
into early Saturday as the cold front and secondary sfc low track
toward the area, along with the warm front of the secondary sfc low.
Some embedded thunderstorms will be possible as the warm sector with
the sfc low moves over the region. Still some timing differences
among guidance with slower guidance around 3 to 6 hours slower than
some of the faster guidance. Rainfall through Saturday night should
range from a few hundredths of an inch for the north country to a
few tenths of an inch for far western NY.

Temperatures during the period will warm to well above normal with
highs on Thursday in the upper 50s to low 70s. Fridays high
temperatures will reach at least 15 degrees above normal, warming
into the mid 60s to near 80 for the day. Some uncertainty for
Thursday temperatures as some guidance has come down a bit on maxT`s
across the area, due to slower warm air advection, so made some
adjustments down, but still a warm day.

&&

.LONG TERM /SATURDAY THROUGH TUESDAY/...
A vertically stack low pressure system located over NW Ontario
Canada will slowly drag a cold through the eastern Great Lakes. Due
to the slow progression of this front, and then a potential
secondary front have kept low end PoPs across much the the forecast
area into Sunday. We should see a fairly widespread area of rain
Saturday move from west to east, which then gives way to chances for
showers into Sunday. Brief surface high pressure builds into the
Great Lakes Sunday night, causing any lingering showers to gradually
deplete from west to east.

Dry weather looks to persist through much of Monday but yet again
another warm frontal boundary will begin to approach from the
southwest. This will introduce a chance of shower either late Monday
night or during the day Tuesday. Still some timing issues to work
out but have once again added chance PoPs reflecting the front
nearing and entering the region.

Overall, temperatures will continue to remain above average through
the weekend and into next week.

&&

.AVIATION /21Z TUESDAY THROUGH SUNDAY/...
Variables across far western New York late this afternoon will
give way to VFR weather towards this evening. Meanwhile...a
swath of light to occasionally moderate shower activity will
push east across the remainder of the region. Cigs will drop to
IFR levels as this pcpn moves through.

As we work through tonight...VFR weather will return to the Southern
Tier. For the majority of the region though...a period of VFR
weather will once again give way to IFR cigs as we work through the
overnight.

On Wednesday...IFR to MVFR cigs in the morning will give way to VFR
weather regionwide.

Outlook...

Thursday...VFR.
Friday...Mainly VFR with a chance of afternoon showers and
thunderstorms.
Saturday...MVFR to VFR with showers likely and possible
thunderstorms.
Sunday...Morning showers otherwise mainly VFR weather.

&&

.MARINE...
A quiet week is expected on the lower Great Lakes as the pressure
gradients remains weak. Winds will generally remain 15 knots or
less. There will periodic showers or thunderstorms today before
dry weather returns for the mid week period.

&&

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

&&

$$

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