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Eye on the Sky

July 27, 2016

Detailed Forecast

Today

Mostly sunny this afternoon, except for increasing late-day clouds in southern Québec, and the slight chance of a late-day shower or thunderstorm there. Highs in the mid to upper 80s, with some lower 90s in southern valleys and in the Champlain Valley. West to southwest winds 5 to 10 mph.

Tonight

Becoming partly cloudy south and mostly cloudy north, with the slight chance of a shower along and north of Route 2. Lows in the low to mid 60s, mid to upper 60s in the Champlain, Hudson, and St. Lawrence Valleys. Light winds, variable to southwest.

Thursday

Partly to mostly cloudy. Scattered showers and thunderstorms north, widely scattered south. Highs in the low to mid 80s north, mid to upper 80s south, and around 90 in far southern valleys and in the Upper Connecticut Valley. West winds 10 mph or less.

Thursday Night

Mostly cloudy. Slight chance of a shower or thunderstorm, mainly during the evening. Lows in the low to mid 60s, near 70 in the broad valleys west. Light winds, variable to north.

Significant/Hazardous Weather

None.

Extended Forecast

Today

Mostly sunny this afternoon, except for increasing late-day clouds in southern Québec, and the slight chance of a late-day shower or thunderstorm there. Highs in the mid to upper 80s, with some lower 90s in southern valleys and in the Champlain Valley. West to southwest winds 5 to 10 mph.

Tonight

Becoming partly cloudy south and mostly cloudy north, with the slight chance of a shower along and north of Route 2. Lows in the low to mid 60s, mid to upper 60s in the Champlain, Hudson, and St. Lawrence Valleys. Light winds, variable to southwest.

Thursday

Partly to mostly cloudy. Scattered showers and thunderstorms north, widely scattered south. Highs in the low to mid 80s north, mid to upper 80s south, and around 90 in far southern valleys and in the Upper Connecticut Valley. West winds 10 mph or less.

Thursday Night

Mostly cloudy. Slight chance of a shower or thunderstorm, mainly during the evening. Lows in the low to mid 60s, near 70 in the broad valleys west. Light winds, variable to north.

Friday

Partly cloudy north, partly to mostly cloudy south. Chance of showers north, scattered showers and thunderstorms south. Highs in the upper 70s to lower 80s north, and low to mid 80s south. Light north to northwest winds.

Friday Night

Partly cloudy north, variable clouds south. Chance for a shower or thunderstorm, mainly south. Lows 52-62 north, 58-65 south.

Saturday

Mostly sunny. Highs 72-80 north, near 80 south.

Saturday Night

Partly cloudy. Lows 50-60.

Sunday

Partly cloudy. Chance of showers, mainly south. Highs 73-82.

Significant/Hazardous Weather

None.

Recreational Forecast

General:

Becoming partly sunny in the Eastern Townships and Montreal metro area eastward through the Richelieu Valley during the PM with isolated PM showers or thunderstorms. Isolated showers by evening to extreme n’n VT and far n’n NH. Otherwise mostly sunny. Highs 83-92. West wind 5-15 mph.

Brief:

A mostly sunny, summery day is in store for the vast majority of the region thanks to HIGH pressure ridged from Indiana eastward through Pennsylvania and New Jersey this morning. A westerly flow around the northern periphery of this HIGH will advect very warm air over us, and temperatures should push well into the 80s at lower elevation sites; the broader valley floors will see some 90 degree readings. There is a weak cold front arced from northwest Quebec through east-central Ontario then through northern Wisconsin early today, that will approach close enough to bring some clouds and widely scattered showers or thunderstorms to far southern Quebec this afternoon, but the main threat for showers from this boundary will come tomorrow as it settles southward across the northern third of the region.

Winds:

Today: West 5-15 mph. Tonight: Diminishing to light and variable. Thursday: Light and variable. On the open waters of Lake Champlain, the National Weather Service forecast is for south winds 5-10 kts in the morning, veering to southwest during the afternoon. Tonight, southwest 10-15 kts backing to south and decreasing to 5-15 kts after midnight. Thursday, light, variable wind becoming west 10-20 kts during the afternoon. Waves on the open water around 1 foot today and tonight, diminishing to less than 1 foot Thursday morning, then increasing to 1-2 feet Thursday afternoon. For further information on lake levels and water temperatures consult http://forecast.weather.gov/product.php?site=BTV&product=REC&issuedby=BTV

Mountain:

Today: Sunny, except becoming partly sunny during the afternoon over the mountains west of Lake Memphramagog, with the very slight chance for a late-day shower or thunderstorm there. Tonight: Partly cloudy. Widely scattered showers or thunderstorms n’n Adirondacks, far n’n Greens and n’n Whites. Dry otherwise. Thursday: Considerable clouds. Scattered showers and thunderstorms. Best chance central Ads through n’n and central Greens and Whites.

Winds Today Thursday Friday
2000ft W 05-15 mph SW-NW 05-15 mph NNW 05-15 mph
4000ft W 05-15 mph W 10-20 mph NW 10-15 mph
6000ft WNW 10-15 mph W 10-20 mph NW 15 mph
Temperatures Today Thursday Friday
2000ft 83-85 77-82 73-76
4000ft 72-74 67-72 63-66
6000ft Nr 61 Nr 59 Nr 56