Tracking Atmospheric River in the Northwest U.S. and Clipper with Winter Weather in the Northeast U.S.

A prolonged atmospheric river will continue to bring gusty winds, heavy rainfall which may lead to urban and river flooding with possible landslides, and heavy inter-mountain snow over the Pacific Northwest into the northern Rockies through Thursday. A clipper will cross the Great Lakes and Northeast U.S. into Thursday with areas of moderate to heavy snow and mixed wintry precipitation. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Mondell Field (KECS)

Lat: 43.89°NLon: 104.32°WElev: 4173ft.

Mostly Cloudy

32°F

0°C

Humidity	100%
Wind Speed	W 5 mph
Barometer	29.85 in
Dewpoint	32°F (0°C)
Visibility	10.00 mi
Wind Chill	27°F (-3°C)
Last update	10 Dec 6:15 pm MST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Newcastle WY

Tonight
Low: 35 °F⇑
Rain Likely
then Chance
Rain
Thursday
High: 51 °F
Chance Rain
and Breezy
Thursday Night
Low: 24 °F
Rain/Snow
Likely then
Chance Snow
Friday
High: 30 °F
Snow Likely
Friday Night
Low: 20 °F
Chance Snow
Saturday
High: 34 °F
Slight Chance
Snow then
Partly Sunny
Saturday Night
Low: 17 °F
Partly Cloudy
Sunday
High: 50 °F
Sunny
Sunday Night
Low: 29 °F
Mostly Clear

Detailed Forecast

Tonight

Rain likely, mainly before 11pm. Cloudy, then gradually becoming partly cloudy, with a temperature rising to around 40 by 11pm. Northwest wind 3 to 8 mph. Chance of precipitation is 70%.

Thursday

A 30 percent chance of rain after 11am. Partly sunny, with a high near 51. Breezy, with a northwest wind 8 to 13 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 29 mph.

Thursday Night

Rain likely before 9pm, then rain and snow likely between 9pm and 10pm, then snow likely after 10pm. Cloudy, with a low around 24. Northwest wind 13 to 18 mph decreasing to 7 to 12 mph after midnight. Winds could gust as high as 28 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

Friday

Snow likely, mainly before 11am. Cloudy, with a high near 30. Wind chill values as low as 19. Northwest wind around 6 mph becoming southwest in the afternoon. Chance of precipitation is 60%. New snow accumulation of around an inch possible.

Friday Night

A 30 percent chance of snow. Mostly cloudy, with a low around 20. South wind around 6 mph becoming west after midnight.

Saturday

A 20 percent chance of snow before 11am. Partly sunny, with a high near 34. Northwest wind 6 to 8 mph becoming south in the afternoon. Winds could gust as high as 16 mph.

Saturday Night

Partly cloudy, with a low around 17. Southeast wind 3 to 6 mph.

Sunday

Sunny, with a high near 50. Light southeast wind.

Sunday Night

Mostly clear, with a low around 29.

Monday

Sunny, with a high near 52.

Monday Night

Partly cloudy, with a low around 31.

Tuesday

Mostly sunny, with a high near 50.