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  Thursday October 19, 2017

 

NWS Area Forecast Discussion


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674
FXUS61 KBTV 181953
AFDBTV

Area Forecast Discussion
National Weather Service Burlington VT
353 PM EDT Wed Oct 18 2017

.SYNOPSIS...
High pressure along the east coast of the United States will
maintain dry conditions across the North Country through Sunday.
With south to southwest winds in place, temperatures will warm
well above seasonal levels for mid to late October beginning
today, and continue through the upcoming weekend. The next
chance of appreciable precipitation occurs by Monday into
Tuesday of next week as a cold front crosses the area from west
to east.

&&

.NEAR TERM /THROUGH THURSDAY/...
As of 205 PM EDT Wednesday...Going forecast on track. 925mb
temps around 12C at BTV per RAP this afternoon which should
yield max temps in the mid 60s in the valleys lower 60s in the
hills this afternoon which is well covered in the going
forecast.

Very quiet wx through the near-term. Generally looking at clear
skies otherwise through tonight. The sfc ridge axis extending
along the east coast of the U.S. and building shortwave ridging
aloft will bring dry weather, but southerly pressure gradient
increases overnight especially west of the Greens with light
south to southwest winds and moderating temperatures. Only a
very small chance for any radiation fog east of the Greens so
left it out. Lows mainly in the 40s for tonight except near 50
in the St. Lawrence and Champlain valleys.

Temperatures moderate further on Thursday under a rather strong
west southwest flow with 850-mb winds 30 to 50 kts leading to
breezy surface winds of around 15 kt with gusts to 25 to 30 kt.
With 925-mb temps around 14C for looking for max temps reaching
the upper 60s to lower 70s.

Another mid-upr level shortwave trough is progged to pass along
the intl border Thursday afternoon. This feature should bring
an increase in mid-upr level clouds, but dry low-level
conditions should preclude any precipitation.

&&

.SHORT TERM /THURSDAY NIGHT THROUGH SATURDAY NIGHT/...
As of 334 PM EDT Wednesday...A rather dry cold front will pass
through the region Thursday night with some clouds especially in
the northern Green mountains where a sprinkle can`t be ruled
out. 925mb temps drop to about 8C near BTV on Friday for
"cooler" high temps in the mid 50s to lower 60s, still a bit
above normal. High pressure will slide across the mid-Atlantic
states and off the coast lead to quiet weather conditions with
mostly clear skies under broad subsidence. Return SW flow around
the high with warm advection over the weekend will will bring
warming temps each day with upper 60s Saturday to 70 by Sunday.
Each night we`ll radiatively cool and should see temps in the
upper 30s to low 40s.

&&

.LONG TERM /SUNDAY THROUGH WEDNESDAY/...
As of 352 PM EDT Wednesday...High pressure will be the dominant
feature over the weekend. Surface ridge axis will slide
eastward over the Atlantic seaboard, increasing warm
southwesterly flow. This will result in daytime max temperatures
in the mid 60s to low 70s to close out the weekend. Min
temperatures will see a warming trend heading into the work
week, from mid 40s to mid 50s.

The beginning of the work week will see a pattern change as a
cold front associated with a mid-upper level longwave trough
approaches from the west. The North Country will see an increase
in clouds and potential for rain some time late Monday into
Tuesday. Potential for rain showers will be reinforced,
especially on Tuesday at the mid-upper level trough digs
southward into the Mississippi valley. At the surface, ECMWF and
GFS show closed low pressure system develop and move over SE
Ontario/NW NY by late Tuesday. Increased pressure gradient at
the surface should lead to fairly gusty winds with the potential
for 15-25 mph with gust to 35mph Tuesday into Wednesday.

&&

.AVIATION /20Z WEDNESDAY THROUGH MONDAY/...
Through 12Z Thursday...Mainly VFR/dry with breezy south to
southwest winds gusty to 25-30 kts by 15-18z Thu. A moderately
strong pressure gradient develops with high pressure over the
southeast US and low pressure over James Bay through Thu so
along with the winds it looks like chances of any fog at KMPV is
small early tomorrow morning. Only expecting some high to mid
level clouds toward 18z Thu ahead of an approaching weak cold
front which passes through mainly dry Thursday night with a wind
shift to west northwest.

Outlook...

Thursday Night: VFR. Breezy. NO SIG WX.
Friday: VFR. NO SIG WX.
Friday Night: VFR. NO SIG WX.
Saturday: VFR. NO SIG WX.
Saturday Night: VFR. NO SIG WX.
Sunday: VFR. NO SIG WX.
Sunday Night: VFR. Chance SHRA.
Monday: VFR. Chance SHRA.

&&

.MARINE...
Southerly winds will increase overnight reaching 15 to 25 kts by
dawn Thursday as a moderately strong pressure gradient develops.
Relatively mild water temps in the upper 50s may mix winds of
30 knots just above the surface early Thursday morning, so could
be a bit higher than 25 knot for a few hours from sunrise to
noon. Winds should slowly diminish late in the afternoon and
then shift to the west northwest 10 to 15 knots Thursday night.

&&

.EQUIPMENT...
KTYX radar at Fort Drum, New York will remain down for
scheduled maintenance through a good portion of today (October
18) as technicians repaint the radome.

&&

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

&&

$$
SYNOPSIS...Sisson
NEAR TERM...Sisson
SHORT TERM...Sisson
LONG TERM...KGM
AVIATION...Banacos
MARINE...
EQUIPMENT...Team BTV



 
 
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