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Mount Washington Valley Forecast

Saturday, August 30, 2014
4:18 AM

High pressure will continue to slide offshore today as an area of low pressure approaches the St Lawrence River Valley for Sunday. The exiting high will bring a warm and moist return flow to the region keeping temperatures above normal. Some areas will wake to fog or low level clouds, but these are expected to break up leaving generally sunny conditions for the afternoon today. As the low approaches, it will swing a warm front northward overnight. This will spread clouds back in and may result in a few light rain showers or thunderstorms across the region after midnight. Sunday, a trailing cold front from the low will approach from the west. Ahead of the front, temperatures and humidity levels will continue to rise adding to instability with the front. The passing front will then result in widespread rain showers and thunderstorms for the day and into the evening. Thunderstorms may become severe during the afternoon resulting in strong and sudden gusts of wind, small hail, or heavy downpours.

Monday, the front will stall slightly allowing for continued chances of showers and thunderstorms during the day before finally tapering overnight as the front slides offshore. Tuesday will see a brief break in many parts however, a diurnally induced shower or two cannot be completely ruled out. Tuesday night, a secondary cold front approaches bringing another round of rain showers and possible thunderstorms to the region. Unsettled weather will then linger into Wednesday morning before high pressure builds in providing fair skies and a gradual warm up for the region for the remainder of the workweek.

Ryan Knapp
Staff Meteorologist
Forecast

Today:

Partly sunny.

Highs: mid 70s°F

Wind: SW around 10 mph

Tonight:

Increasingly cloudy.

Lows: upper 50s°F

Wind: SW shifting W around 10 mph

Extended Outlook

Tomorrow:

Cloudy w/ showers and thunderstorms.

Highs: upper 70s; humid°F

Lows: mid 60s; humid°F

Monday

Mostly cloudy w/ chance of showers and a slight chance of thunderstorms.

Highs: upper 70s; humid°F

Lows: lower 60s°F

Tuesday

Partly sunny. Chance of overnight showers or thunderstorms.

Highs: upper 70s°F

Lows: mid 60s°F

Wednesday

Partly sunny.

Highs: mid 70s°F

Lows: around 60°F

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