National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds in the North-Central U.S.

A prolonged atmospheric river will continue impacting the Pacific Northwest with heavy rainfall which has lead to areas of urban and river flooding along with gusty winds into Thursday. A clipper will bring heavy snow, some mixed wintry precipitation, and gusty to high winds across the northern Plains, Upper Midwest, and the Great Lakes into Thursday morning. Read More >

Hazardous Weather Conditions

Current conditions at

Grissom Air Force Base / Peru (KGUS)

Lat: 40.65°NLon: 86.15°WElev: 810ft.

Partly Cloudy

37°F

3°C

Humidity 75%
Wind Speed SW 13 mph
Barometer 29.68 in (1006.1 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 9 Dec 4:55 pm EST
Extended Forecast for

Grissom Air Force Base / Peru IN

  • Tonight

    Tonight: Rain, mainly after 8pm. Low around 34. Breezy, with a south wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 34 °F

    Rain Likely
    then Rain and
    Breezy

  • Wednesday

    Wednesday: Rain and snow likely before 2pm, then a chance of snow. Cloudy, with a high near 38. Southwest wind around 20 mph becoming northwest in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 38 °F

    Rain/Snow
    Likely

  • Wednesday Night

    Wednesday Night: A 30 percent chance of snow, mainly before 8pm. Mostly cloudy, with a low around 19. West wind 10 to 15 mph, with gusts as high as 25 mph.

    Low: 19 °F

    Chance Snow

  • Thursday

    Thursday: Partly sunny, with a high near 28. West wind around 10 mph.

    High: 28 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of snow. Mostly cloudy, with a low around 20. Southwest wind around 5 mph becoming southeast after midnight.

    Low: 20 °F

    Chance Snow

  • Friday

    Friday: A 50 percent chance of snow. Mostly cloudy, with a high near 32.

    High: 32 °F

    Chance Snow

  • Friday Night

    Friday Night: A 20 percent chance of snow before 1am. Mostly cloudy, with a low around 14.

    Low: 14 °F

    Slight Chance
    Snow

  • Saturday

    Saturday: A 50 percent chance of snow, mainly after 1pm. Mostly cloudy and cold, with a high near 19.

    High: 19 °F

    Slight Chance
    Snow then
    Chance Snow

  • Saturday Night

    Saturday Night: A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 1.

    Low: 1 °F

    Chance Snow

Detailed Forecast

Tonight
Rain, mainly after 8pm. Low around 34. Breezy, with a south wind 15 to 25 mph, with gusts as high as 40 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday
Rain and snow likely before 2pm, then a chance of snow. Cloudy, with a high near 38. Southwest wind around 20 mph becoming northwest in the afternoon. Winds could gust as high as 35 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Wednesday Night
A 30 percent chance of snow, mainly before 8pm. Mostly cloudy, with a low around 19. West wind 10 to 15 mph, with gusts as high as 25 mph.
Thursday
Partly sunny, with a high near 28. West wind around 10 mph.
Thursday Night
A 50 percent chance of snow. Mostly cloudy, with a low around 20. Southwest wind around 5 mph becoming southeast after midnight.
Friday
A 50 percent chance of snow. Mostly cloudy, with a high near 32.
Friday Night
A 20 percent chance of snow before 1am. Mostly cloudy, with a low around 14.
Saturday
A 50 percent chance of snow, mainly after 1pm. Mostly cloudy and cold, with a high near 19.
Saturday Night
A 30 percent chance of snow before 1am. Mostly cloudy, with a low around 1.
Sunday
Mostly sunny and cold, with a high near 11.
Sunday Night
Partly cloudy, with a low around -1.
Monday
A 20 percent chance of snow. Partly sunny, with a high near 22.
Monday Night
Mostly cloudy, with a low around 11.
Tuesday
Partly sunny, with a high near 28.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grissom Air Force Base / Peru IN
 40.65°N 86.14°W (Elev. 804 ft)
Last Update:
4:30 pm EST Dec 9, 2025
Forecast Valid:
5pm EST Dec 9, 2025-6pm EST Dec 16, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation