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Expires:201711232100;;838020
FPUS51 KBTV 231117
ZFPBTV

Zone Forecast Product for Vermont and Northern New York
National Weather Service Burlington VT
614 AM EST Thu Nov 23 2017


VTZ006-232100-
Lamoille-
Including the cities of Johnson and Stowe
614 AM EST Thu Nov 23 2017

.TODAY...Partly sunny. Scattered flurries this morning. Highs around
30. Light and variable winds. 
.TONIGHT...Partly cloudy with a 20 percent chance of snow showers.
Lows in the mid 20s. Light and variable winds. 
.FRIDAY...Partly sunny. Highs in the lower 40s. Light and variable
winds, becoming south around 10 mph in the afternoon. 
.FRIDAY NIGHT...Mostly clear. Lows in the lower 30s. South winds
10 to 15 mph with gusts up to 25 mph. 
.SATURDAY...Mostly cloudy with a 50 percent chance of rain showers.
Highs in the lower 40s. Southwest winds 10 to 15 mph with gusts up
to 25 mph. 
.SATURDAY NIGHT...Mostly cloudy with a chance of snow or rain
showers. Lows in the mid 20s. Chance of precipitation 50 percent. 
.SUNDAY...Cloudy with a 50 percent chance of snow showers. Highs in
the upper 20s. 
.SUNDAY NIGHT...Mostly cloudy with a 50 percent chance of snow
showers. Lows around 20. 
.MONDAY...Partly sunny with a 30 percent chance of snow showers.
Highs around 30. 
.MONDAY NIGHT...Partly cloudy. Lows in the lower 20s. 
.TUESDAY...Partly sunny. Highs in the lower 40s. 
.TUESDAY NIGHT...Partly cloudy. Lows in the lower 30s. 
.WEDNESDAY...Mostly cloudy with a chance of rain or snow showers.
Highs in the lower 40s. Chance of precipitation 40 percent. 

$$


Expires:201711231200;;838370
ASUS41 KBTV 231130
RWRBTV
VERMONT REGIONAL WEATHER ROUNDUP
NATIONAL WEATHER SERVICE BURLINGTON VT
600 AM EST THU NOV 23 2017

NOTE: "FAIR" INDICATES FEW OR NO CLOUDS BELOW 12,000 FEET WITH NO 
SIGNIFICANT WEATHER AND/OR OBSTRUCTIONS TO VISIBILITY.

* THESE REPORTS ARE NOT UNDER NWS QUALITY CONTROL AND/OR DO NOT
  REPORT WEATHER SUCH AS PRECIPITATION AND FOG.


VTZ001>019-231200-
_____VERMONT_____

  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
BURLINGTON     MOCLDY    22  12  65 NE5       30.12S WCI  16          
MONTPELIER     CLOUDY    17  12  80 NW10G17   30.08R WCI   5          
MORRISVILLE    CLOUDY    17  12  80 CALM      30.08R                  
ST. JOHNSBURY*   N/A     21  13  71 MISG      30.04R                  
LYNDONVILLE*   FAIR      17  12  79 SW7       30.05R WCI   8          
MIDDLEBURY*    FAIR      20  14  76 CALM      30.11R                  
RUTLAND*       CLOUDY    23  15  71 NW7       30.08R WCI  15          
SPRINGFIELD    PTCLDY    26  16  65 NW9       30.06R WCI  17          
HIGHGATE*      LGT SNOW  20  15  79 CALM      30.13S                  
NEWPORT*       LGT SNOW  18  15  85 CALM      30.05S                  
BENNINGTON     CLOUDY    24  16  71 W3        30.07S                  
SUTTON*          N/A     16 N/A N/A MISG        N/A                   
ISLAND POND*     N/A     19 N/A N/A W10         N/A  WCI   8          
GALLUP MILLS*    N/A     18 N/A N/A MISG        N/A                   
UNION VILLAGE*   N/A     23 N/A N/A MISG        N/A                   

_____LAKE CHAMPLAIN_____

  
CITY           SKY/WX    TMP DP  RH WIND       PRES   REMARKS
BURTON ISLAND*   N/A     25  18  74 NW9G16      N/A  WCI  15          
COLCHESTER RF*   N/A     27  16  63 W15         N/A  WCI  15          
DIAMOND ISL*     N/A     27  18  69 N8          N/A  WCI  18          

$$


Expires:No;;838119
FXUS61 KBTV 231121
AFDBTV

Area Forecast Discussion
National Weather Service Burlington VT
621 AM EST Thu Nov 23 2017

.SYNOPSIS...
Generally fair weather is expected across the North Country for
Thanksgiving through Friday with a period of lake effect snow 
showers across the western Adirondacks tonight. Temperatures 
will be seasonably cool today, but moderate to above normal 
levels on Friday. The next chance for widespread precipitation 
will be on Saturday, mainly in the form of rain, with another 
cold front crossing the area.

&&

.NEAR TERM /THROUGH FRIDAY/...
As of 621 AM EST Thursday...Quick update to earlier forecast, 
mainly to adjust temps and sky cover slightly. Also, based on 
surface obs, added in some flurries to central and northeastern 
Vermont through mid-morning.

Previous Discussion...Mainly quiet weather is expected for most
of the region over the next 36 hours with the only real concern
being some light lake effect snow working into the western 
Adirondacks for a period tonight.

Thanksgiving Day will start with mainly dry conditions and 
varying amounts of cloud cover as low level moisture remains 
trapped below a subsidence inversion. Latest IR imagery does 
indicate that the drier air aloft is beginning to win out, so I 
do expect low clouds to scour out through the morning into 
partly sunny skies by this afternoon. Also, based on a few 
surface obs and radar imagery, can't rule out some flurries 
where low clouds are more persistent. Highs will be on the 
chilly side of normal and range through the 30s.

Heading into this evening, a weak surface front and shortwave 
trough passing north of the border will shift the low/mid level 
flow to the southwest allowing a lake effect snow band to 
develop off Lake Ontario. Consensus among the hi-res CAM models 
is that the band will briefly shift over portions of southern 
St. Lawrence and Franklin counties in New York from about 00-06Z
before moving south and dissipating as the flow weakens and turns
more westerly. Don't expect any big travel impacts, but we 
could see a dusting to perhaps an inch in spots, especially in 
the NY Route 3 corridor around Star Lake and Wanakena.

In the wake of the upper trough passage tonight, high pressure 
builds back into the region for Friday with a quiet yet mild day
on tap as southwesterly flow begins to increase again with 
another low passing to the northwest of the region. No 
precipitation is expected over the forecast area, far removed 
from any deep moisture, but temps should warm nicely into the 
40s area-wide under partly to mostly sunny skies, especially 
across central and southern areas.

&&

.SHORT TERM /FRIDAY NIGHT THROUGH SATURDAY NIGHT/...
As of 322 AM EST Thursday...
Friday Night: for the most part, it looks dry for the period. 
South/southwest winds will be on the increase as the pressure 
gradient tightens in advance of a front. We should see winds in the 
925-850mb layer (roughly 2000-4500 ft) increase into the 45-55kt 
range as well. Given a stable near surface boundary layer, most of 
this wind will stay above the surface, however it still will get 
breezy especially in the Champlain and St Lawrence Valleys as the 
flow is channeled up the valleys. Expect gusts on the order of 25-30 
mph. It will probably blow even stronger over Lake Champlain as the 
relatively warmer waters will promote better mixing of the near 
surface boundary layer. The winds also make for a tricky temperature 
forecast. Think in general lows from the Champlain Valley westward 
will occur Friday evening, with a steady to slow rise the rest of 
the night. Eastern Vermont will be more protected from the winds, 
but even late at night will likely see temperatures begin to rise. 
Most guidance suggests that precipitation with the front will be 
just getting into the St Lawrence Valley very late, so have painted 
in some 20-40% PoPs in that part of the world after 10z Saturday. 
Temperatures aloft will be too warm (+3 to +5C at 850mb)for any 
snow, so looking for only light rain.

Saturday: Band of light rain showers treks rapidly across the 
region, and should be east of the forecast area by early afternoon. 
Not really a well defined front, so surface convergence isn't 
strong, nor are the upper level dynamics. Thus the band of rain 
showers will be weakening as it goes across. QPF amounts are 
expected to be minimal, generally less than 1/10" of rain. Blended 
in BTV4km, NAM3km and NAM output to drive the hourly forecast for 
the band of precipitation. As mentioned above, temperatures aloft 
will be too warm for snow, even at the highest summits.  The colder 
temperatures aloft will start to filter in by mid/late afternoon, so 
although the main batch of showers will have ended, enough low level 
moisture along with westerly winds will drive a few residual very 
light rain/snow showers across the higher terrain.

Saturday Night: a fast moving sharp shortwave will approach the 
region overnight. With the dynamics and increasing moisture 
(partially from flow coming across the Great Lakes), expecting snow 
showers to re-develop across the region, especially the higher 
terrain of the Adirondacks and northern/central Green Mountains with 
orographic enhancement. Light accumulations are expected.

&&

.LONG TERM /SUNDAY THROUGH WEDNESDAY/...
As of 322 AM EST Thursday...
Sunday: All guidance indicate the fast moving shortwave will zip 
across the region during the day. Thus expect scattered snow 
showers, especially during the first half of the day. Looks like 
flow turns northwest and strengthens, so this should enhance 
orographic enhancement, especially for the northern Greens and the 
'Dacks. Could see additional light accumulations.  The trough should 
drive enough snow shower activity that even lower elevations may see 
a trace to 1/4" of snow. The snow shower activity will quickly fade 
during the afternoon as the trough moves away. Although not looking 
at a lot of snow, there could still be some slick travel conditions.

Monday/Tuesday: The changeable pattern continues. Flow will begin 
turning southwest again as a trough develops well to the west and 
high pressure moves off the east coast. Thus a moderating trend will 
start. Monday will be a bit warmer than Sunday, and Tuesday is 
certainly looking mild. 925mb temperatures will be around +5C, so we 
may see some valley locations make a run at 50F. 

Wednesday: More uncertainty in the models this far out.  Both GFS 
and ECMWF suggest a cold front will sweep in during the day. However 
timing and overall strength of the front is very uncertain. Just 
went with the guidance blend at this point to indicate roughly 30-
40% chance of precipitation. With uncertainty in the boundary layer 
and temperature profile above the surface, I just painted in 
rain/snow showers for the potential weather.

&&

.AVIATION /12Z THURSDAY THROUGH MONDAY/...
Through 12Z Friday...Low clouds continue to slowly erode over
the region but are still holding tough across portions of
northern Vermont. As we progress through the morning, expect low
clouds to completely scatter out while mid and high level 
clouds increase through midnight before generally lowering to 
MVFR and locally IFR at KSLK where lake effect snow showers 
shift into portions of the Adirondacks after 02Z. Northwest 
winds mainly 5-10kts early this morning turn south/southwest by 
mid-day.

Outlook...

Friday: VFR. NO SIG WX.
Friday Night: VFR. Chance SHRA.
Saturday: Mainly VFR, with areas MVFR possible. Chance SHRA,
Chance SHSN.
Saturday Night: Mainly MVFR, with local IFR possible. Chance
SHRA, Chance SHSN.
Sunday: Mainly MVFR, with local IFR possible. Chance SHSN.
Sunday Night: Mainly MVFR, with local VFR possible. Slight chance
SHSN.
Monday: Mainly VFR, with areas MVFR possible. NO SIG WX.

&&

.BTV WATCHES/WARNINGS/ADVISORIES...
VT...None.
NY...None.

&&

$$
SYNOPSIS...Lahiff
NEAR TERM...Lahiff
SHORT TERM...Nash
LONG TERM...Nash
AVIATION...Lahiff

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