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Eye on the Sky

September 23, 2021

Detailed Forecast

Today

Variable clouds and sunshine, with some spotty showers or sprinkles through NH, and south of Rt. 4. A rising chance of afternoon showers in NY and the St. Lawrence Valley. Highs in the 70s. South winds 10 to 15 mph, gusting to 30 mph from the Green Mountains west.

Tonight

Periods of rain and showers becoming likely through NY and the St. Lawrence Valley, spreading east to the Green Mountains late, with a rising chance of showers east of the Green Mountains. Lows in the upper 50s to mid 60s. South winds 10 to 15 mph, gusting to 30 mph.

Friday

Showers, possibly a thunderstorm, ending through NY and the St. Lawrence Valley by noon, and the CT Valley late. Becoming sunny in NY, spreading east to the Green Mountains late. Cooler. Highs in the upper 60s to low 70s, some mid 60s in the Adirondacks. South winds 10 to 15 mph, gusting to 30 mph, becoming southwest and decreasing in the afternoon.

Friday Night

Scattered evening showers, mainly in NH, ending. Partly cloudy from the Green Mountains west, and clearing east. Lows in the upper 40s to mid 50s from west to east. Winds becoming southwest near 10 mph, diminishing to light and variable.

Significant/Hazardous Weather

None.

Extended Forecast

Today

Variable clouds and sunshine, with some spotty showers or sprinkles through NH, and south of Rt. 4. A rising chance of afternoon showers in NY and the St. Lawrence Valley. Highs in the 70s. South winds 10 to 15 mph, gusting to 30 mph from the Green Mountains west.

Tonight

Periods of rain and showers becoming likely through NY and the St. Lawrence Valley, spreading east to the Green Mountains late, with a rising chance of showers east of the Green Mountains. Lows in the upper 50s to mid 60s. South winds 10 to 15 mph, gusting to 30 mph.

Friday

Showers, possibly a thunderstorm, ending through NY and the St. Lawrence Valley by noon, and the CT Valley late. Becoming sunny in NY, spreading east to the Green Mountains late. Cooler. Highs in the upper 60s to low 70s, some mid 60s in the Adirondacks. South winds 10 to 15 mph, gusting to 30 mph, becoming southwest and decreasing in the afternoon.

Friday Night

Scattered evening showers, mainly in NH, ending. Partly cloudy from the Green Mountains west, and clearing east. Lows in the upper 40s to mid 50s from west to east. Winds becoming southwest near 10 mph, diminishing to light and variable.

Saturday

Sunshine, mixed with clouds at times, especially from the Green Mountains west. Highs in the upper 60s to low 70s. Winds light.

Saturday Night

Partly cloudy from the Green Mountains east. Periods of clouds west, with a few localized showers in NY and the St. Lawrence Valley late. Lows in the upper 40s to low 50s.

Sunday

Variable clouds and sun from the Adirondacks and Rt. 4 north, with a few passing, brief showers. Partly sunny south. Cool. Highs ranging through the 60s, some upper 50s in the Adirondacks.

Sunday Night

A few stray evening showers, then partly cloudy overnight. Lows in the 40s to near 50.

Monday

Partly sunny, with a few localized, brief showers, mainly across the higher terrain north. Cool. Highs in the upper 50s to mid 60s.

Significant/Hazardous Weather

None.

Recreational Forecast

General:

Variable clouds and sunshine, with some spotty showers or sprinkles through NH, and south of Rt. 4. A rising chance of afternoon showers in NY and the St. Lawrence Valley. Highs in the 70s. South winds 10 to 15 mph, gusting to 30 mph from the Green Mountains west.

Brief:

Mild, moist, and breezy – the past 24 hours reminded me a bit of Ireland, where ocean winds sweep episodes of clouds and passing showers, interrupted by moments of sun. The set-up for our weather has been much the same, with high pressure southeast of Nova Scotia, and a slowly approaching cold front extending from western NY and PA, south through the Appalachians to the Carolina coast, are channeling this mild, moist southerly airflow off the Atlantic, resulting in the periods of clouds, along with a very mild, summer-like morning for the first full day of Fall. While a few spotty showers or sprinkles are possible, especially from the White Mountains and Rt. 4 in VT, south, as well as the Adirondacks, a pocket of drier air rotating around the high to our east will help the clouds break for periods of sun, giving us a warm and steamy afternoon, with 70s, even a few low 80s in the Champlain and St. Lawrence valleys. By late today, as the high to the east weakens, and the front in NY and PA edges east, expect a rising chance of showers late in NY, becoming likely by midnight and working east late tonight into Friday. This slow movement will mean a fairly substantial rain, perhaps a half inch to an inch for most of us. By tomorrow afternoon, the front should reach NH, which means the morning showers in NY will give way to some afternoon sun, progressing into western VT and the Berkshires later in the day. This slot of drier air starts off the weekend with lots of sun Saturday, much lighter winds, and seasonable temperatures. Meanwhile, a storm in the upper atmosphere rotates into the Great Lakes Saturday, heading east toward us Sunday with cooler temperatures, lots of clouds and a few brief, localized, passing showers.

Winds:

***A LAKE WIND ADVISORY IN EFFECT***
At lower elevations, winds south 10 to 15 mph, gusting to 30 mph, with waves on the open waters of Lake Champlain 1 to 3 feet. Tonight, winds south 10 to 15 mph east of the Green Mountains, light in sheltered valleys, and 10 to 25, gusting to 30 mph from the Green Mountains west, with waves on the open waters of Lake Champlain 2 to 4 feet. On Friday, winds south 10 to 15 mph, gusting to 30 mph, becoming southwest and decreasing in the afternoon, with waves on the open waters of Lake Champlain subsiding to 1 to 3 feet. The outlook for Saturday, light winds, with waves on the open waters of Lake Champlain less than 1 foot.


For more details on Lake Champlain, go to: http://forecast.weather.gov/product.php?site=BTV&product=REC&issuedby=BTV

Mountain:

The summits will see periods of clouds, with a few intervals of sun. The clouds will occasionally scrape the summits of the White Mountains, and later this afternoon the Adirondacks, with a few spotty showers or some drizzle. Moderate south winds continuing, and temperatures steady. Friday’s outlook features the summits obscured in clouds and rain, followed by clearing in the Adirondacks in the afternoon, and clouds lifting with some breaks in the Green Mountains later in the day. Moderate to strong south winds, shifting to the southwest and decreasing in the afternoon, with little change in temperature. The outlook for the weekend finds any morning clouds through NH moving out for some sun, while from the Green Mountains west, sunshine will mix with afternoon clouds. Temperatures cooler, while winds decrease from the south. On Sunday, periods of clouds through the Adirondacks, northern Green and White Mountains will occasionally see some passing showers, and a few breaks of sun in the south. Light winds becoming northwest, sending temperatures lower.

Winds Today Friday Saturday
2000ft SSE 20 to 30 mph SSE 40>SW 25 mph N>S 5 to 10 mph
4000ft SSE 25 to 40 mph S 50>SSW 25 mph SW 5>S 10 mph
6000ft S 35 to 50 mph S 45 to 60 mph SW 10 to 20 mph
Temperatures Today Friday Saturday
2000ft near 70 60s 60s
4000ft 60 to 65 60 to 65 near 60
6000ft 50 to 55 near 50 45 to 50

Eye on the Sky is produced at the Fairbanks Museum & Planetarium.

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