Special Weather Statement, NWS Albany, NY

AREA FORECAST DISCUSSION
National Weather Service Albany NY
129 PM EDT Fri Jun 5 2020

.SYNOPSIS...
Warm and humid with isolated to scattered showers and
thunderstorms this afternoon and evening. A cold front
approaching from the Great Lakes will bring additional scattered
showers and thunderstorms late tonight into Saturday morning.
High pressure will then bring cooler and much less humid
conditions for Sunday through early next week.

&&

.NEAR TERM /UNTIL 6 PM THIS EVENING/...
As of 115 PM, Warm and humid today with dew points mainly in
the 60s across the area. Isolated convection has begun to
initiate mainly in the vicinity and north of I-90 where there
has been more sunshine. No lightning has been detected yet.
Have instability and shear has increased with the SPC
mesoanalysis indicating 0-6km effective bulk shear of 40 knots
when storms are firing and lower values to the south. PWATs
range from 1 to 1.5 inches with the higher values south and east
of Capital District so heavy downpours expected. Any stronger
thunderstorms are expected to remain to our south. We are
outlooked for general thunderstorms by the Storm Prediction
Center.

&&

.SHORT TERM /6 PM THIS EVENING THROUGH SUNDAY NIGHT/...
Tonight, other than isolated evening showers/thunderstorms
mainly across the mid Hudson Valley and NW CT, a general lull in
convection is expected due to limited forcing. However, after
midnight and especially closer to daybreak, a cold front and
upper level height falls will approach from the west. Will have
to watch for any upstream convection across the Great
Lakes/southern Ontario which occurs this evening, which could
potentially reach into at least the southern Adirondacks and
Mohawk Valley region after midnight. 0-6 km shear increases
during this time period ahead of the approaching mid/upper level
trough to 40-50 KT across northwest areas, so should any deeper
convection occur, will have to watch for strong wind potential.
For now, SPC has region within general thunderstorm category
with expectation for diurnal minimum in instability to limit
convective potential. Otherwise, warm and muggy overnight, with
lows mainly in the 60s, although some portions of the Hudson
River Valley could remain closer to, or slightly above 70.

Saturday, aforementioned cold front should be across the SW
Adirondacks/Mohawk Valley around or shortly after sunrise, and
continuing to track E/SE. Some lingering showers/isolated
thunderstorms may be ongoing with or ahead of the front. As the
front continues tracking east/southeast into the mid Hudson
Valley, Berkshires and southern VT during the mid to late
morning hours, SB CAPES may rise to 1000 J/kg or greater, along
with 0-6 km shear of at least 30-40 KT. Scattered thunderstorms
should develop in these areas, and again, will have to watch for
any strong wind potential with deeper convection. Behind the
front, becoming mostly sunny and breezy (west/northwest winds
possibly reaching 25-35 mph at times), with temps reaching the
mid 70s to lower/mid 80s, along with lowering dewpoints.
However, a secondary cold front and additional cooling aloft
with the approach of the main trough could allow additional
scattered showers/isolated thunderstorms across the southern
Adirondacks, southern VT and upper Hudson Valley later in the
afternoon through Saturday evening.

Saturday night-Sunday night, main upper level trough/cold pool
passes across the region Saturday night into Sunday morning.
Enough low level instability could allow for isolated/scattered
showers to persist across portions of the Mohawk Valley and
southern Adirondacks during this time. Lows Saturday night in
the 40s across northern areas, and 50s central and south. Some
brief showers could occur Sunday morning across the Capital
Region and mid Hudson Valley east into the Berkshires/NW CT and
southern VT. Improving conditions for Sunday afternoon, with
highs in the 60s for the mountains, and lower/mid 70s in
valleys.

Clear and chilly for Sunday night, with lows in the mid 40s to
lower 50s, except for some 30s across portions of the SW
Adirondacks.

&&

.LONG TERM /MONDAY THROUGH THURSDAY/...
Big bubble, no trouble through mid week as an anomalously strong
upper ridge remains in control of our sensible weather. Seasonable
temperatures on Monday will warm to the mid and upper 80s for
Tuesday and Wednesday. Skies will be mostly sunny each day. Because
we are near the longest days of the year, there will be limited time
for temperatures to cool off each night, with lows in the 50s to low
60s each night.

As we move into Thursday, the sensible weather becomes a bit more
uncertain. Both global models track the remnants of Cristobal into
Ontario (by Wednesday night) as it gets absorbed into the upper
level trough. At the surface, a frontal boundary extends from
Ontario, southward towards the Gulf coast. Additionally, ridging
strengthens across the central CONUS. This ridge continues to
strengthen and push northward into Canada, and should be the
deciding factor as to how the upper trough over Canada evolves and
moves east. Models do remain consistent bringing a series of frontal
boundaries through our forecast area. The first of which will track
through Thursday night into Friday with a decent slug of moisture
connected to the Gulf. The second frontal boundary passage will
likely pass through sometime Saturday morning with drier air
filtering in behind it. This will result in scattered showers
Thursday night through the day Saturday. Temperatures Thursday and
Friday will be closer to normal with highs in the 70s to low
80s.

&&

.AVIATION /18Z FRIDAY THROUGH WEDNESDAY/...
Flying conditions have mainly be VFR early this afternoon,
although some periods of lower stratus have been occasionally
allowing for MVFR cigs at KPSF. Will generally anticipated VFR
conditions through the rest of the day. There have been some
scattered showers developing and it's possible that a stray
brief shower or even a t-storm passes over a terminal through
this evening. However coverage will be rather low and brief in
duration so will only address with a VCSH for now. South to
southwest winds will be 5 to 10 kts.

Overnight, any showers or t-storms will dissipate allowing for
VFR conditions with just some patchy lingering mid level clouds.
It will remain rather muggy, so some MVFR/IFR fog and low
stratus may develop by late in the night, mainly for KPSF/KGFL.
After sunrise, any fog/low stratus looks to quickly dissipate.

The front will pass through early in the day on Saturday. This
will allow southerly winds to become westerly by the mid to late
morning hours and increase to 10 to 15 kts. Some sct-bkn cigs at
5-8 kft will slowly lower in coverage through the day with VFR
conditions.

Outlook...

Saturday Night: Low Operational Impact. Isolated SHRA...TSRA.
Sunday: Low Operational Impact. NO SIG WX.
Sunday Night: No Operational Impact. NO SIG WX.
Monday: No Operational Impact. NO SIG WX.
Monday Night: No Operational Impact. NO SIG WX.
Tuesday: No Operational Impact. NO SIG WX.

&&

.FIRE WEATHER...
Warmer and more humid today with isolated to scattered showers
and thunderstorms, especially south and east of Albany. A cold
front will bring additional scattered showers/thunderstorms late
tonight into Saturday morning, with breezy conditions developing
in the wake of the front Saturday afternoon. High pressure will
bring fair weather for Sunday afternoon through early next week.

&&

.HYDROLOGY...
Scattered showers and isolated thunderstorms are expected today
through Saturday morning, as a warm front initially lifts
northward, followed by a cold frontal passage Saturday morning.
Although widespread heavy rain is not expected, locally heavy
downpours within showers/thunderstorms could produce ponding of
water on roadways and in low lying areas given PWAT's of around
1.5 inches.

Mainly dry weather is then expected Sunday through early next
week.

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...IAA/KL
NEAR TERM...IAA/KL
SHORT TERM...KL
LONG TERM...JLV
AVIATION...Frugis
FIRE WEATHER...IAA/KL
HYDROLOGY...IAA/KL

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Special Weather Statement
National Weather Service Albany NY
313 PM EDT Fri Jun 5 2020

NYZ048-049-051-052-052000-
Eastern Albany-Eastern Schenectady-Western Schenectady-Western
Albany-
313 PM EDT Fri Jun 5 2020

...A STRONG THUNDERSTORM WILL AFFECT SOUTH CENTRAL SCHENECTADY AND
NORTHEASTERN ALBANY COUNTIES...

At 313 PM EDT, a strong thunderstorm was located over Altamont, or
near Rotterdam, moving east at 20 mph.

Winds in excess of 40 mph and half inch hail are possible with this
storm.

Locations impacted include...
Albany, Colonie, Delmar, Guilderland, Duanesburg, Voorheesville,
Altamont, Loudonville, New Scotland, Princetown, Bleecker Stadium,
Slingerlands, Meadowdale, Normansville, Gifford, West Albany,
Karlsfeld, Maywood, Dunnsville and Houcks Corners.

This includes the following highways...
 Interstate 88 between exits 24 and 25.
 Interstate 90 between exits 5A and 25.
 Interstate 890 near exit 9.
 Interstate 87 between exits 23 and 4.
 Interstate 787 near exit 1.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

LAT...LON 4270 7413 4280 7411 4272 7373 4257 7379
TIME...MOT...LOC 1913Z 289DEG 19KT 4273 7405

Frugis

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