Alert archive / New York / Flash Flood Watches in 2021

Flash Flood Watch 8, NWS Albany, NY

September 22, 20214 counties in New York; Berkshire County, Massachusetts; Northwest Hills Planning Region, Connecticut

NWS Albany, NY issued this flash flood watch at Sep 22, 2021, 4:01 PM EDT for 4 counties in New York; Berkshire County, Massachusetts; Northwest Hills Planning Region, Connecticut. It took effect at Sep 23, 2021, 5:00 PM EDT. It was in force for 17 hr.

The area

The counties it named.

The facts

Issued
Sep 22, 2021, 4:01 PM EDT (20:01 UTC)
In effect from
Sep 23, 2021, 5:00 PM EDT
Expired
Sep 24, 2021, 9:55 AM EDT
In force
17 hr
Issued by
NWS Albany, NY
Flood severity
None

Counties Northwest Hills Planning Region, CT, Berkshire County, MA, Columbia County, NY, Dutchess County, NY, Greene County, NY, Ulster County, NY

The radar

The Albany radar (KENX), 65 km from the middle of the area, began a volume at 20:01 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Albany, NY (KALY), launched 12:00Z, 8.0 hours before the alert went out and 70 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Albany, NY at 12:00Z on 2021-09-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 23 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Albany, NY at 12:00Z on 2021-09-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 265 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
23 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
513 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
265 m²/s²
0-3 km storm-relative helicity
310 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

453 
WGUS61 KALY 222001
FFAALY

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Albany NY
Issued by National Weather Service Burlington VT
401 PM EDT Wed Sep 22 2021

NYZ058-063>066-230415-
/O.NEW.KALY.FF.A.0008.210923T2100Z-210924T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Western Greene-Western Ulster-Eastern Ulster-Western Dutchess-
Eastern Dutchess-
Including the cities of Pine Plains, Stanfordville, Arlington, West 
Hurley, Woodstock, Kerhonkson, Napanoch, Millbrook, Amenia, Hunter, 
West Shokan, Dover Plains, Beacon, Poughkeepsie, New Paltz, Windham, 
Wingdale, Ellenville, Tannersville, Kingston, Prattsville, Sundown, 
and Pawling
401 PM EDT Wed Sep 22 2021

...FLASH FLOOD WATCH IN EFFECT FROM THURSDAY AFTERNOON THROUGH 
FRIDAY MORNING...

The National Weather Service in Albany has issued a

* Flash Flood Watch for a portion of east central New York, 
  including the following areas, Eastern Dutchess, Eastern Ulster, 
  Western Dutchess, Western Greene and Western Ulster.

* From Thursday afternoon through Friday morning.

* A slow moving frontal boundary will bring a period of moderate to 
  heavy rainfall to the area. Some embedded thunderstorms are also 
  possible. Total rainfall amounts of 1 to 3 inches are forecast, 
  with locally higher amounts.

* Heavy rainfall may cause flooding of roads and ponding of water in 
  low lying areas.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

ATE
7 follow-up statements
755 
WGUS61 KALY 230229
FFAALY

Flood Watch
National Weather Service Albany NY
Issued by National Weather Service Burlington VT
1029 PM EDT Wed Sep 22 2021

NYZ058-063>066-231100-
/O.CON.KALY.FF.A.0008.210923T2100Z-210924T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Western Greene-Western Ulster-Eastern Ulster-Western Dutchess-
Eastern Dutchess-
Including the cities of Pine Plains, Stanfordville, Arlington, West 
Hurley, Woodstock, Kerhonkson, Napanoch, Millbrook, Amenia, Hunter, 
West Shokan, Dover Plains, Beacon, Poughkeepsie, New Paltz, Windham, 
Wingdale, Ellenville, Tannersville, Kingston, Prattsville, Sundown, 
and Pawling
1029 PM EDT Wed Sep 22 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM THURSDAY AFTERNOON 
THROUGH FRIDAY MORNING...

The Flash Flood Watch continues for

* A portion of east central New York, including the following areas, 
  Eastern Dutchess, Eastern Ulster, Western Dutchess, Western Greene 
  and Western Ulster.

* From Thursday afternoon through Friday morning.

* A slow moving frontal boundary will bring a period of moderate to 
  heavy rainfall to the area. Some embedded thunderstorms are also 
  possible. Total rainfall amounts of 1 to 3 inches are forecast, 
  with locally higher amounts in favored southeast upslope areas of 
  the eastern Catskills.

* Heavy rainfall may cause flooding of roads and ponding of water in 
  low lying areas, as well as isolated to scattered flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

JPV
235 
WGUS61 KALY 230740
FFAALY

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Albany NY
Issued by National Weather Service Burlington VT
340 AM EDT Thu Sep 23 2021

NYZ059>061-231545-
/O.EXA.KALY.FF.A.0008.210923T2100Z-210924T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Eastern Greene-Western Columbia-Eastern Columbia-
Including the cities of Catskill, Cairo, Jefferson Heights, Hudson, 
Athens, New Lebanon, and Coxsackie
340 AM EDT Thu Sep 23 2021

...FLASH FLOOD WATCH IN EFFECT FROM THIS AFTERNOON THROUGH FRIDAY 
MORNING...

The National Weather Service in Albany has expanded the

* Flash Flood Watch to include a portion of east central New York, 
  including the following areas, Eastern Columbia, Eastern Greene 
  and Western Columbia.

* From this afternoon through Friday morning.

* A slow moving cold front will bring a period of moderate to heavy 
  rainfall to the area.  Some embedded thunderstorms are also 
  possible.  Total rainfall amounts of 1 to 3 inches may occur.

* Heavy rainfall may cause flooding of roads and ponding of water in 
  the low-lying areas, as well as isolated to scattered flash 
  flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

NYZ058-063>066-231545-
/O.CON.KALY.FF.A.0008.210923T2100Z-210924T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Western Greene-Western Ulster-Eastern Ulster-Western Dutchess-
Eastern Dutchess-
Including the cities of Pine Plains, Stanfordville, Arlington, West 
Hurley, Woodstock, Kerhonkson, Napanoch, Millbrook, Amenia, Hunter, 
West Shokan, Dover Plains, Beacon, Poughkeepsie, New Paltz, Windham, 
Wingdale, Ellenville, Tannersville, Kingston, Prattsville, Sundown, 
and Pawling
340 AM EDT Thu Sep 23 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM THIS AFTERNOON THROUGH 
FRIDAY MORNING...

The Flash Flood Watch continues for

* A portion of east central New York, including the following areas, 
  Eastern Dutchess, Eastern Ulster, Western Dutchess, Western Greene 
  and Western Ulster.

* From this afternoon through Friday morning.

* A slow moving frontal boundary will bring a period of moderate to 
  heavy rainfall to the area. Some embedded thunderstorms are also 
  possible. Total rainfall amounts of 1 to 3 inches are forecast, 
  with locally higher amounts in favored southeast upslope areas of 
  the eastern Catskills.

* Heavy rainfall may cause flooding of roads and ponding of water in 
  low lying areas, as well as isolated to scattered flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

TAW
399 
WGUS61 KALY 231009
FFAALY

Flood Watch
National Weather Service Albany NY
Issued by National Weather Service Burlington VT
609 AM EDT Thu Sep 23 2021

NYZ058>061-063>066-232100-
/O.CON.KALY.FF.A.0008.210923T2100Z-210924T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Western Greene-Eastern Greene-Western Columbia-Eastern Columbia-
Western Ulster-Eastern Ulster-Western Dutchess-Eastern Dutchess-
Including the cities of Catskill, Pine Plains, Stanfordville, 
Arlington, Jefferson Heights, West Hurley, Woodstock, Kerhonkson, 
Napanoch, Millbrook, Amenia, Hunter, West Shokan, Dover Plains, 
Beacon, Poughkeepsie, New Paltz, Hudson, New Lebanon, Athens, 
Windham, Wingdale, Coxsackie, Ellenville, Tannersville, Cairo, 
Kingston, Prattsville, Sundown, and Pawling
609 AM EDT Thu Sep 23 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM 5 PM EDT THIS AFTERNOON 
THROUGH FRIDAY MORNING...

The Flash Flood Watch continues for

* A portion of east central New York, including the following areas, 
  Eastern Columbia, Eastern Dutchess, Eastern Greene, Eastern 
  Ulster, Western Columbia, Western Dutchess, Western Greene and 
  Western Ulster.

* From 5 PM EDT this afternoon through Friday morning.

* A slow moving frontal boundary will bring a period of moderate to 
  heavy rainfall to the area. Some embedded thunderstorms are also 
  possible. Total rainfall amounts of 1 to 3 inches are forecast, 
  with locally higher amounts in favored southeast upslope areas of 
  the eastern Catskills.

* Heavy rainfall may cause flooding of roads and ponding of water in 
  low lying areas, as well as isolated to scattered flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

TAW
639 
WGUS61 KALY 231917
FFAALY

URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Albany NY
317 PM EDT Thu Sep 23 2021

CTZ001-013-MAZ001-025-240330-
/O.EXB.KALY.FF.A.0008.210924T0400Z-210924T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Litchfield-Southern Litchfield-Northern Berkshire-Southern
Berkshire-
Including the cities of Great Barrington, South Egremont, 
Pittsfield, Hancock, Florida, Oakville, North Adams, New Milford, 
Thomaston, Terryville, Torrington, Gaylordsville, Dalton, and 
Sandisfield
317 PM EDT Thu Sep 23 2021

...FLASH FLOOD WATCH IN EFFECT FROM MIDNIGHT EDT TONIGHT THROUGH 
FRIDAY MORNING...

The National Weather Service in Albany has expanded the

* Flash Flood Watch to include portions of northwestern Connecticut 
  and western Massachusetts, including the following areas, in 
  northwestern Connecticut, Northern Litchfield and Southern 
  Litchfield. In western Massachusetts, Northern Berkshire and 
  Southern Berkshire.

* From Midnight EDT tonight through Friday morning.

* A slow moving frontal boundary will bring a period of moderate to 
  heavy rainfall to the area. Some embedded thunderstorms are also 
  possible. Total rainfall amounts of 1 to 3 inches are forecast, 
  with locally higher amounts in favored east upslope areas of 
  the Berkshires.

* Heavy rainfall may cause flooding of roads and ponding of water in 
  low lying areas, as well as isolated to scattered flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

NYZ058>061-063>066-240330-
/O.CON.KALY.FF.A.0008.210923T2100Z-210924T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Western Greene-Eastern Greene-Western Columbia-Eastern Columbia-
Western Ulster-Eastern Ulster-Western Dutchess-Eastern Dutchess-
Including the cities of Catskill, Pine Plains, Stanfordville, 
Arlington, Jefferson Heights, West Hurley, Woodstock, Kerhonkson, 
Napanoch, Millbrook, Amenia, Hunter, West Shokan, Dover Plains, 
Beacon, Poughkeepsie, New Paltz, Hudson, New Lebanon, Athens, 
Windham, Wingdale, Coxsackie, Ellenville, Tannersville, Cairo, 
Kingston, Prattsville, Sundown, and Pawling
317 PM EDT Thu Sep 23 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY MORNING...

The Flash Flood Watch continues for

* A portion of east central New York, including the following areas, 
  Eastern Columbia, Eastern Dutchess, Eastern Greene, Eastern 
  Ulster, Western Columbia, Western Dutchess, Western Greene and 
  Western Ulster.

* Through Friday morning.

* A slow moving frontal boundary will bring a period of moderate to 
  heavy rainfall to the area. Some embedded thunderstorms are also 
  possible. Total rainfall amounts of 1 to 3 inches are forecast, 
  with locally higher amounts in favored southeast upslope areas of 
  the eastern Catskills.

* Heavy rainfall may cause flooding of roads and ponding of water in 
  low lying areas, as well as isolated to scattered flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

IAA
409 
WGUS61 KALY 240025
FFAALY

Flood Watch
National Weather Service Albany NY
825 PM EDT Thu Sep 23 2021

NYZ058>061-063>066-240900-
/O.CON.KALY.FF.A.0008.000000T0000Z-210924T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Western Greene-Eastern Greene-Western Columbia-Eastern Columbia-
Western Ulster-Eastern Ulster-Western Dutchess-Eastern Dutchess-
Including the cities of Catskill, Pine Plains, Stanfordville, 
Arlington, Jefferson Heights, West Hurley, Woodstock, Kerhonkson, 
Napanoch, Millbrook, Amenia, Hunter, West Shokan, Dover Plains, 
Beacon, Poughkeepsie, New Paltz, Hudson, New Lebanon, Athens, 
Windham, Wingdale, Coxsackie, Ellenville, Tannersville, Cairo, 
Kingston, Prattsville, Sundown, and Pawling
825 PM EDT Thu Sep 23 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY MORNING...

The Flash Flood Watch continues for

* A portion of east central New York, including the following areas, 
  Eastern Columbia, Eastern Dutchess, Eastern Greene, Eastern 
  Ulster, Western Columbia, Western Dutchess, Western Greene and 
  Western Ulster.

* Through Friday morning.

* A slow moving front will continue to bring a period of moderate to 
  heavy rainfall to the area. Some embedded thunderstorms are also 
  possible. Total rainfall amounts of 1 to 3 inches are forecast, 
  with locally higher amounts in favored southeast upslope areas of 
  the eastern Catskills.

* Heavy rainfall may cause flooding of roads and ponding of water in 
  low lying areas, as well as isolated to scattered flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

CTZ001-013-MAZ001-025-240900-
/O.CON.KALY.FF.A.0008.210924T0400Z-210924T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Litchfield-Southern Litchfield-Northern Berkshire-Southern
Berkshire-
Including the cities of Great Barrington, South Egremont, 
Pittsfield, Hancock, Florida, Oakville, North Adams, New Milford, 
Thomaston, Terryville, Torrington, Gaylordsville, Dalton, and 
Sandisfield
825 PM EDT Thu Sep 23 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT FROM MIDNIGHT EDT TONIGHT 
THROUGH FRIDAY MORNING...

The Flash Flood Watch continues for

* Portions of northwestern Connecticut and western Massachusetts, 
  including the following areas, in northwestern Connecticut, 
  Northern Litchfield and Southern Litchfield. In western 
  Massachusetts, Northern Berkshire and Southern Berkshire.

* From Midnight EDT tonight through Friday morning.

* A slow moving front will bring a period of moderate to heavy 
  rainfall to the area. Some embedded thunderstorms are also 
  possible. Total rainfall amounts of 1 to 3 inches are forecast, 
  with locally higher amounts in favored east upslope areas of the 
  Berkshires.

* Heavy rainfall may cause flooding of roads and ponding of water in 
  low lying areas, as well as isolated to scattered flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

JPV
738 
WGUS61 KALY 240714
FFAALY

Flood Watch
National Weather Service Albany NY
314 AM EDT Fri Sep 24 2021

NYZ058>061-063>066-240815-
/O.CAN.KALY.FF.A.0008.000000T0000Z-210924T1500Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Western Greene-Eastern Greene-Western Columbia-Eastern Columbia-
Western Ulster-Eastern Ulster-Western Dutchess-Eastern Dutchess-
Including the cities of Catskill, Pine Plains, Stanfordville, 
Arlington, Jefferson Heights, West Hurley, Woodstock, Kerhonkson, 
Napanoch, Millbrook, Amenia, Hunter, West Shokan, Dover Plains, 
Beacon, Poughkeepsie, New Paltz, Hudson, New Lebanon, Athens, 
Windham, Wingdale, Coxsackie, Ellenville, Tannersville, Cairo, 
Kingston, Prattsville, Sundown, and Pawling
314 AM EDT Fri Sep 24 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for a portion of east central New York, 
including the following areas, Eastern Columbia, Eastern Dutchess, 
Eastern Greene, Eastern Ulster, Western Columbia, Western Dutchess, 
Western Greene and Western Ulster has been cancelled.

Flooding is no longer expected to pose a threat. Please continue to 
heed remaining road closures.

$$

CTZ001-013-MAZ001-025-241600-
/O.CON.KALY.FF.A.0008.000000T0000Z-210924T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Litchfield-Southern Litchfield-Northern Berkshire-Southern
Berkshire-
Including the cities of Great Barrington, South Egremont, 
Pittsfield, Hancock, Florida, Oakville, North Adams, New Milford, 
Thomaston, Terryville, Torrington, Gaylordsville, Dalton, and 
Sandisfield
314 AM EDT Fri Sep 24 2021

...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL NOON EDT TODAY...

The Flash Flood Watch continues for

* Portions of northwestern Connecticut and western Massachusetts, 
  including the following areas, in northwestern Connecticut, 
  Northern Litchfield and Southern Litchfield. In western 
  Massachusetts, Northern Berkshire and Southern Berkshire.

* Until Noon EDT today.

* A slow moving front will continue to bring a period of moderate to 
  heavy rainfall to the area. Some embedded thunderstorms are also 
  possible. Total rainfall amounts of 1 to 3 inches are forecast, 
  with locally higher amounts in favored east upslope areas of the 
  Berkshires.

* Heavy rainfall may cause flooding of roads and ponding of water in 
  low lying areas, as well as isolated flash flooding.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

You should monitor later forecasts and be prepared to take action 
should Flash Flood Warnings be issued.

&&

$$

TAW
121 
WGUS61 KALY 241355
FFAALY

Flood Watch
National Weather Service Albany NY
955 AM EDT Fri Sep 24 2021

CTZ001-013-MAZ001-025-241500-
/O.CAN.KALY.FF.A.0008.000000T0000Z-210924T1600Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Northern Litchfield-Southern Litchfield-Northern Berkshire-Southern
Berkshire-
Including the cities of Great Barrington, South Egremont, 
Pittsfield, Hancock, Florida, Oakville, North Adams, New Milford, 
Thomaston, Terryville, Torrington, Gaylordsville, Dalton, and 
Sandisfield
955 AM EDT Fri Sep 24 2021

...FLASH FLOOD WATCH IS CANCELLED...

The Flash Flood Watch for Litchfield and Berkshire counties has been 
cancelled.

The Flood Watch is cancelled. Flooding is no longer expected to pose 
a threat. Please continue to heed remaining road closures.

$$

IAA

What forecasters said that day

The local office's own words before this flash flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Albany, NY wrote its last area forecast discussion before this flash flood watch went out at Sep 22, 3:37 PM EDT, 24 minutes earlier.

Area forecast discussion, Sep 22, 3:37 PM EDT, 24 minutes before
AREA FORECAST DISCUSSION
National Weather Service Albany NY
Issued by National Weather Service Burlington VT
337 PM EDT Wed Sep 22 2021

.SYNOPSIS...
Tonight will be mild with increased humidity levels and the chance
for additional showers. Warm and humid conditions will continue
during the day on Thursday with chance for showers. Thursday night
into Friday, a period of moderate to heavy rainfall is possible as a
cold front approaches. Following the cold frontal passage, cooler
weather is expected for the weekend with the slight chance for some
occasional showers.

&&

.NEAR TERM /UNTIL 6 AM THURSDAY MORNING/...
Tonight, an upper low will be in the process of becoming vertically-
stacked and ultimately closed or cut-off over the central Great
Lakes. At the same time, near the surface, a surface frontal
boundary will become occluded over the Ohio Valley. Eastern New York
and western New England will be squarely in the storm system's warm
sector. A mostly cloudy to overcast deck of low level stratus clouds
will serve as insolation over the area while south-southeast winds
will continue to advect and keep an abundance of low-level moisture
in place. This will ultimately yield a mild and humid night with
both overnight lows and dewpoints holding in the 60s. The chance for
showers will remain over the area tonight gradually increasing in
percentage and coverage from west to east as the cold front
approaches from the west.

&&

.SHORT TERM /6 AM THURSDAY MORNING THROUGH SATURDAY/...
Confidence has increased over the past 24 hours that the main batch
of rain, associated with the aforementioned closed low and occluded
surface low, will be positioned well to our west enough so that
impacts from this storm system will be minimum.

Thursday evening through Friday morning will be the period in which
the main batch of rain associated with an approaching cold front
pushes over the forecast area. Moderate to heavy rainfall will occur
with this main batch of precipitation as numerous showers and
embedded thunderstorms move over the area. The timing of the event
will not support robust instability values for any widespread severe
weather. That said, some storms could become strong to severe (more
so strong than severe) with the primary threat being gusty winds.
The Storm Prediction Center has placed areas southwest of Albany
under a marginal risk for severe weather for Thursday evening. This
includes the eastern Catskills and the mid-Hudson Valley. PWAT
values between 1-2 inches or 1-2 STDEVs above normal coupled with
the fact that there could be training of storms, suggest the
possibility of excessive rainfall leading to flooding. The Weather
Prediction Center has placed areas along and west of the Hudson
Valley under a marginal risk for excessive rainfall Thursday evening
through Friday morning. Any training of storms could result in
isolated flash flooding and/or flooding in urban/poor drainage
areas.

On Friday, the main corridor of moderate to heavy rain should clear
from west to east over the area with the cold front not far behind.
Following the cold fropa, cooler air will advect in on backing west
winds. Any lingering showers during the morning hours will taper off
or become less numerous during the course of the day.

Dry weather returns to the area on Saturday as the cold front moves
further to the east of our area and in its wake a narrow surface
high pressure system builds into the area.

High temperatures on Thursday will be in the mid to upper 70s along
the river valleys (cooler higher elevations). On Friday, high
temperatures will be in the upper 60s to lower 70s along the river
valleys (cooler higher elevations). On Saturday, high temperatures
will be in the upper 60s to lower 70s along the river valleys
(cooler higher elevations). Overnight lows for Thursday and Friday
night will be in the 60s. For Saturday night, overnight lows will be
in the 50s (40s higher elevations) amid mostly clear skies and ample
radiational cooling effects.

&&

.LONG TERM /SATURDAY NIGHT THROUGH WEDNESDAY/...
The extended forecast period opens with a mean mid and upper level
trough over the eastern CONUS. High pressure will be building in
from the TN and OH Valleys on Saturday.  A few lingering showers in
the wake of front are possible across western New England in the
morning.  Otherwise, a mix of sun and clouds is expected with temps
in the 60s and lower 70s to open the weekend.

Saturday night into Sunday...A cold front approaches and crosses the
region, as the mid and upper level trough becomes negatively tilted.
Isolated to scattered showers are possible for the close of the
weekend, as the higher PoPs were placed in the grids from the
Capital District north and west. The pcpn should be light, as the
front should be moisture starved, as indicated by the latest
ECMWF/GFS. Lows will be in the mid 40s to lower 50s.  Highs will be
mainly in the 60s with a few lower 70s in the Hudson River Valley,
and some upper 50s are possible over the mtns.

Sunday Night through Monday...Another period of fairly tranquil
weather is expected with high pressure building in from the Piedmont
and Mid Atlantic Regions.  Cyclonic flow continues across the region
with the cold pool with the upper trough generating some instability
cumulus, as clouds will mix with sun.  Lows will be in the 40s to
around 50F in a few spots with mainly upper 50s to upper 60s for
highs to open the week.

Monday Night into Tuesday...Another short-wave rotates around the
upper low bringing a slight to low chance of showers especially
across the northern half of the forecast area.  Pcpn is expected to
be light with northern stream energy and cyclonic vorticity
advection driving the moisture convergence and forcing.  Temps will
finish the long term in the seasonable range.

&&

.AVIATION /20Z WEDNESDAY THROUGH MONDAY/...
Variable cloudiness with more VFR than MVFR ceilings across the
area this afternoon. Isolated showers across the region too as
we will carry a VCSH as these showers will have low impacts the
balance of the afternoon. Southerly winds around 10kts with some
gusts to 20kts are to be expected.

The southerly winds continue tonight as low level moisture
continues to advect into the region. This should lower the
ceilings to MVFR and possibly IFR tonight. As somewhat drier air
remains aloft, could see some patchy drizzle form.

As upstream frontal boundary slowly approaches Thursday, the
chance for showers will be on the increase. MVFR ceilings are
expected as we will place a PROB30 group from mid-late morning
hours.

Outlook...

Thursday Night: High Operational Impact. Breezy. Definite SHRA.
Friday: High Operational Impact. Likely SHRA.
Friday Night: Low Operational Impact. Slight Chance of SHRA.
Saturday: Low Operational Impact. Slight Chance of SHRA.
Saturday Night: Low Operational Impact. Slight Chance of SHRA.
Sunday: Moderate Operational Impact. Chance of SHRA.
Sunday Night: No Operational Impact. NO SIG WX.
Monday: No Operational Impact. NO SIG WX.

&&

.FIRE WEATHER...
No fire weather issues expected over the next few days.

Tonight will be mild with increased humidity levels and the chance
for additional showers. Warm and humid conditions will continue
during the day on Thursday with chance for showers. Thursday night
into Friday, a period of moderate to heavy rainfall is possible as a
cold front approaches. Following the cold frontal passage, cooler
weather is expected for the weekend with the slight chance for some
occasional showers.

Tonight, maximum relative humidity values will range from 85-100%.
On Thursday, minimum relative humidity values will range between 65-
100%. Thursday night, max relative humidity values will range
between 85-100%. On Friday, minimum relative humidity values will
range between 60-100%. Friday night, relative humidity values will
max out between 85-100%. On Saturday, minimum relative humidity
values will range between 50-70%.

Tonight, winds will be out of the southeast 5-15 kts with gusts as
high as 20-25 kts (highest over the SW Dacks and eastern Catskills).
On Thursday, winds will remain out of the southeast at 10-15 kts
with gusts between 15-25 kts. Thursday night, southeast winds will
decrease to 5-10 kts. On Friday, winds will shift out of the
southwest with magnitudes up to 5 kts. Friday night, winds will
become light as magnitudes of less than 5 kts. On Saturday, winds
will continue light out of the southwest at magnitudes up to 5 kts.

&&

.HYDROLOGY...
Chances for rain showers will continue to increase tonight through
the end of the week as a slow-moving cold front approaches from the
west. A period of moderate to heavy rainfall is possible as the front
passes. The most likely timing for this will be from Thursday
afternoon into Friday morning.

Area rivers and streams will increase in response to this weather
event, but are expected to remain below flood stage. Isolated Flash
Flooding is possible, mainly in urban and poor drainage areas as
we are under a "Marginal Risk' for excessive rainfall.

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.

&&

.CLIMATE...
Due to our office move this week, we are unable to generate
climate products. We hope to have the ability restored later
today.

&&

.EQUIPMENT...
NOAA Weather Radio operated by NWS Albany will be down as we
relocate to our new office. We hope to have them back in service
by later today.

In addition, KENX radar may experience occasional outages this
week.

&&

.ALY WATCHES/WARNINGS/ADVISORIES...
CT...None.
NY...None.
MA...None.
VT...None.

&&

SYNOPSIS...Evbuoma
NEAR TERM...Evbuoma
SHORT TERM...Evbuoma
LONG TERM...JPV
AVIATION...BGM/Wasula
FIRE WEATHER...Evbuoma
HYDROLOGY...Evbuoma
CLIMATE...
EQUIPMENT...
Hazardous weather outlook, Sep 22, 4:22 AM EDT, 11 hours 39 minutes before
Hazardous Weather Outlook
National Weather Service Albany NY
422 AM EDT Wed Sep 22 2021

CTZ001-013-MAZ001-025-NYZ032-033-038>043-047>054-058>061-063>066-
082>084-VTZ013>015-231100-
Northern Litchfield-Southern Litchfield-Northern Berkshire-
Southern Berkshire-Northern Herkimer-Hamilton-Southern Herkimer-
Southern Fulton-Montgomery-Northern Saratoga-Northern Warren-
Northern Washington-Schoharie-Western Schenectady-
Eastern Schenectady-Southern Saratoga-Western Albany-Eastern Albany-
Western Rensselaer-Eastern Rensselaer-Western Greene-Eastern Greene-
Western Columbia-Eastern Columbia-Western Ulster-Eastern Ulster-
Western Dutchess-Eastern Dutchess-Northern Fulton-Southeast Warren-
Southern Washington-Bennington-Western Windham-Eastern Windham-
422 AM EDT Wed Sep 22 2021

This Hazardous Weather Outlook is for northwestern Connecticut,
western Massachusetts, eastern New York and southern Vermont.

.DAY ONE...Today and tonight.

No hazardous weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

A slow-moving cold front will bring a chance for showers and
isolated thunderstorms Thursday afternoon into Friday. A period of
moderate to heavy rain with this frontal passage may result in
isolated flash flooding, mainly in urban and poor drainage areas.
Some thunderstorms may also produce strong wind gusts.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not expected at this time.

Nearby

Flash Flood Watches in New York, 2021Flash Flood Watches in Massachusetts, 2021Flash Flood Watches in Connecticut, 2021Every flash flood watch in 2021

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.