Area Forecast Discussion
Issued by NWS Burlington, VT

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000 FXUS61 KBTV 171320 AFDBTV Area Forecast Discussion National Weather Service Burlington VT 920 AM EDT Tue Oct 17 2017 .SYNOPSIS... Strong high pressure will bring dry weather through the remainder of the week. After a chilly start this morning, a warming trend will commence as winds switch into the south to southwest this afternoon. Highs in the mid to upper 50s today will moderate into the 60s to low 70s during the next 5 to 7 days, which will be well-above average for mid-October. && .NEAR TERM /THROUGH WEDNESDAY/... As of 920 AM EDT Tuesday...Quick update to the forecast to bring in slightly higher cloud coverage across our northwestern border areas through the noontime hour per satellite trends. Really just mid level stuff above 5000 ft. Rest of forecast remains unchanged. Have a great day! Prior discussion... Synoptically quiescent conditions with clear skies and sfc anticyclone bisecting the North Country early this morning. Light winds in place and will see areas of frost early this morning. A chilly start with sunrise temps generally 25-35F, warmest near Lake Champlain. Did see the first freeze of the season at BTV, with 32F recorded around 538am. Sfc ridge slides east of VT by 18Z inducing a S-SW return flow. Winds increase to 5-10mph across central/ern VT, 10-15 mph in the Champlain Valley, and locally 15-20 mph with gusts to 30 mph in the St. Lawrence Valley with stronger p-gradient and valley channeled flow. Will see temps moderate a bit with just passing thin mid-upr level clouds. Afternoon highs expected to range from the low 50s east of the Green Mtns, to the upr 50s in the Champlain Valley, and generally 55-60F across nrn NY. PoPs NIL. Quiet conditions persist tonight thru Wednesday. Continued S-SW gradient flow will mean PBL remains mixed in most locations and temperatures won`t be as cool. Lows tonight generally mid 40s for the St. Lawrence and Champlain Valleys, and mid-upr 30s across the nrn Adirondacks and ern VT. Highs on Wednesday will moderate into the mid 60s in most valley locations. && .SHORT TERM /WEDNESDAY NIGHT THROUGH THURSDAY NIGHT/... As of 250 AM EDT Tuesday...High pressure at the surface will continue as an upper level shortwave crosses to our north. Given the last trends in guidance and the lack of precipitable water (< 0.8"), I`ve gone ahead and removed mention of any precip over the northern tier of Vermont. Anticipate some clouds moving into the North Country and a subtle wind shift from south westerly winds to westerly winds. There should be some funneling up the Saint Lawrence and Champlain Valleys so it should be pretty breezy in the Saint Lawrence Thursday afternoon. I`ve increased gusts to 20-30mph out of the south just ahead of the frontal passage. Winds in the higher terrain should be fairly brisk. 850-700mb winds should be in 45-50kt range. Otherwise it should be just another warm day in the North Country with temps around 70 in the valleys and upper 60s elsewhere. We cool down briefly but not even close to near normal on the backside of the front as temps overnight fall into the low to mid 40s. && .LONG TERM /FRIDAY THROUGH MONDAY/... As of 250 AM EDT Tuesday...Heading into the weekend the high pressure returns as a broad 1025mb high develops over the eastern CONUS. The ridge remains firmly in place through the weekend as anticyclonic flow brings warm air advection into the North Country. Temps will warm 2-3 degrees each day of the weekend with low 70s likely for Sunday. That certainly wont help our departures from normal which as of this morning is a full 9 degrees above normal for the month. Coming out of the weekend all of the longer ranged solutions are pointing towards a full latitude trough digging into the eastern CONUS which will bring showers to the region. Based on some of the thermal packing along with that front it should be more of our "normal" fall frontal systems with a 10-15 degree drop in temps by Wednesday back to near normal. && .AVIATION /13Z TUESDAY THROUGH SATURDAY/... Through 12Z Wednesday...High pressure in control with dry wx. Mainly VFR thru the period, with just passing mid-upper level clouds this afternoon/eve, and possible SCT-BKN020-030 at SLK tonight with swly flow regime and orographic ascent. SWLY low- level jet may result in LLWS at RUT/SLK after 02Z tonight, but left specific mention out of the TAFs ATTM. Winds light and variable thru mid-morning. As sfc ridge axis slides east of TAF locations, will see developing south to southwest winds...SW 14G24KT at KMSS and S 10KT at BTV. Winds will remain S-SW throughout tonight. Outlook... Wednesday: VFR. NO SIG WX. Wednesday Night: VFR. NO SIG WX. Thursday: VFR. Breezy. NO SIG WX. Thursday Night: VFR. NO SIG WX. Friday: VFR. NO SIG WX. Friday Night: VFR. NO SIG WX. Saturday: VFR. NO SIG WX. && .EQUIPMENT... KTYX radar at Fort Drum, NY will be down for scheduled maintenance today, Tuesday, October 17 through a good portion of Wednesday, October 18 as technicians repaint the radome. && .BTV WATCHES/WARNINGS/ADVISORIES... VT...None. NY...None. && $$ SYNOPSIS...Banacos NEAR TERM...JMG/Banacos SHORT TERM...Deal LONG TERM...Deal AVIATION...Banacos EQUIPMENT...JMG is the U.S. government's official web portal to all federal, state and local government web resources and services.