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

Heavy Rain and Mountain Snow Lingers in California; Winter Storm Impacting the Great Lakes and Northeast U.S.

An atmospheric river will wind down through today across California with lingering heavy rainfall, heavy mountain snow, and gusty winds. A wintry mix of freezing rain, sleet, and snow will cause hazardous travel conditions for the Great Lakes into the northern Mid-Atlantic and southern New England today through Saturday morning. Areas of tree damage and power outages are possible. Read More >

Hazardous Weather Conditions

Current conditions at

Denison (KDNS)

Lat: 41.98°NLon: 95.38°WElev: 1273ft.

Fair with Haze

N/A

Humidity NA
Wind Speed SE 5 mph
Barometer 29.77 in
Dewpoint N/A
Visibility 6.00 mi
Last update 27 Dec 5:15 am CST
Extended Forecast for

Mapleton IA

Dense Fog Advisory December 27, 05:31am until December 27, 09:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory December 27, 05:31am until December 27, 09:00am

    NOW until 9:00am Sat

    Dense Fog Advisory

  • Today

    High: 55 °F

    Patchy Dense
    Fog then
    Cloudy

  • Tonight

    Tonight: A 40 percent chance of rain after 5am. Patchy fog between 11pm and 4am. Otherwise, cloudy, with a low around 30. Blustery, with a light and variable wind becoming north northwest 13 to 18 mph after midnight. Winds could gust as high as 31 mph.

    Low: 30 °F

    Patchy Fog
    then Chance
    Rain and
    Patchy Fog

  • Sunday

    Sunday: Rain and snow, becoming all snow after 8am. Patchy blowing snow after 8am. Patchy fog between 8am and 10am. Temperature falling to around 15 by 5pm. Windy, with a northwest wind 21 to 26 mph, with gusts as high as 45 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.

    High: 33 °F⇓

    Rain/Snow and
    Patchy
    Blowing Snow

  • Sunday Night

    Sunday Night: Patchy blowing snow before 5am. Mostly cloudy, with a low around 6. Wind chill values as low as -12. Blustery, with a northwest wind 18 to 24 mph, with gusts as high as 44 mph.

    Low: 6 °F

    Patchy
    Blowing Snow
    and Blustery

  • Monday

    Monday: Mostly sunny, with a high near 18. Blustery, with a northwest wind 10 to 18 mph, with gusts as high as 36 mph.

    High: 18 °F

    Mostly Sunny
    and Blustery
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 7. Northwest wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 17 mph.

    Low: 7 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 38. Light south southwest wind becoming west southwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph.

    High: 38 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 19. Northwest wind around 6 mph.

    Low: 19 °F

    Partly Cloudy

Detailed Forecast

Today
Patchy dense fog before 10am. Otherwise, cloudy, with a high near 55. South wind 5 to 9 mph becoming light south southeast in the afternoon. Winds could gust as high as 18 mph.
Tonight
A 40 percent chance of rain after 5am. Patchy fog between 11pm and 4am. Otherwise, cloudy, with a low around 30. Blustery, with a light and variable wind becoming north northwest 13 to 18 mph after midnight. Winds could gust as high as 31 mph.
Sunday
Rain and snow, becoming all snow after 8am. Patchy blowing snow after 8am. Patchy fog between 8am and 10am. Temperature falling to around 15 by 5pm. Windy, with a northwest wind 21 to 26 mph, with gusts as high as 45 mph. Chance of precipitation is 80%. New snow accumulation of 1 to 2 inches possible.
Sunday Night
Patchy blowing snow before 5am. Mostly cloudy, with a low around 6. Wind chill values as low as -12. Blustery, with a northwest wind 18 to 24 mph, with gusts as high as 44 mph.
Monday
Mostly sunny, with a high near 18. Blustery, with a northwest wind 10 to 18 mph, with gusts as high as 36 mph.
Monday Night
Mostly clear, with a low around 7. Northwest wind 5 to 8 mph becoming calm after midnight. Winds could gust as high as 17 mph.
Tuesday
Mostly sunny, with a high near 38. Light south southwest wind becoming west southwest 5 to 9 mph in the morning. Winds could gust as high as 18 mph.
Tuesday Night
Partly cloudy, with a low around 19. Northwest wind around 6 mph.
Wednesday
Mostly cloudy, with a high near 35. Northwest wind 6 to 9 mph becoming north northeast in the afternoon. Winds could gust as high as 18 mph.
Wednesday Night
Mostly cloudy, with a low around 8. North wind 6 to 8 mph, with gusts as high as 16 mph.
New Year's Day
Mostly sunny, with a high near 20. North northwest wind 5 to 7 mph.
Thursday Night
Partly cloudy, with a low around 6. Light and variable wind becoming south around 5 mph after midnight.
Friday
Mostly sunny, with a high near 27. South wind 5 to 8 mph, with gusts as high as 16 mph.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mapleton IA
 42.18°N 95.79°W (Elev. 1135 ft)
Last Update:
5:01 am CST Dec 27, 2025
Forecast Valid:
5am CST Dec 27, 2025-6pm CST Jan 2, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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