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

Heavy Great Lakes Snow through Friday; Extreme Cold and Potential for Major Winter Storm Late Week into this Weekend

Multiple clipper systems will bring cold temperatures and enhance lake-effect snow downwind of the Great Lakes. An arctic blast will bring frigid temperatures accompanied with gusty winds that may lead to dangerous wind chills beginning in the Northern Plains Thursday before expanding to the South and East. An expansive winter storm will start Friday in the Southern Rockies/Plains and Mid-South. Read More >

Hazardous Weather Conditions

Current conditions at

Guam International Airport (PGUM)

Lat: 13.48°NLon: 144.8°EElev: 304ft.

Overcast

83°F

28°C

Humidity 79%
Wind Speed SE 7 mph
Barometer 29.72 in (1005.6 mb)
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 21 Jan 12:54 pm ChST
Extended Forecast for

Santa Rita GU

Flood Advisory until January 21, 01:45pm
Flash Flood Warning until January 21, 01:45pm
Click here for hazard details and duration
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  •  
    Flood Advisory until January 21, 01:45pm
    Flash Flood Warning until January 21, 01:45pm

    NOW: Multiple hazards in effect

    Click HERE for Details

  • This Afternoon

    High: 87 °F

    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers and thunderstorms. Mostly cloudy, with a low around 77. East wind around 9 mph. Chance of precipitation is 40%.

    Low: 77 °F

    Scattered
    Showers

  • Thursday

    Thursday: Scattered showers and thunderstorms. Mostly cloudy, with a high near 86. East southeast wind 9 to 13 mph. Chance of precipitation is 50%.

    High: 86 °F

    Scattered
    Showers

  • Thursday Night

    Thursday Night: Scattered showers and thunderstorms. Mostly cloudy, with a low around 77. East southeast wind 8 to 10 mph. Chance of precipitation is 40%.

    Low: 77 °F

    Scattered
    Showers

  • Friday

    Friday: Partly sunny, with a high near 86. Southeast wind 11 to 15 mph, with gusts as high as 20 mph.

    High: 86 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 77.

    Low: 77 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 85.

    High: 85 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 77.

    Low: 77 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Scattered showers and thunderstorms. Partly sunny, with a high near 87. East wind 9 to 11 mph. Chance of precipitation is 30%.
Tonight
Scattered showers and thunderstorms. Mostly cloudy, with a low around 77. East wind around 9 mph. Chance of precipitation is 40%.
Thursday
Scattered showers and thunderstorms. Mostly cloudy, with a high near 86. East southeast wind 9 to 13 mph. Chance of precipitation is 50%.
Thursday Night
Scattered showers and thunderstorms. Mostly cloudy, with a low around 77. East southeast wind 8 to 10 mph. Chance of precipitation is 40%.
Friday
Partly sunny, with a high near 86. Southeast wind 11 to 15 mph, with gusts as high as 20 mph.
Friday Night
Partly cloudy, with a low around 77.
Saturday
Partly sunny, with a high near 85.
Saturday Night
Mostly cloudy, with a low around 77.
Sunday
A chance of showers. Partly sunny, with a high near 87.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 77.
Monday
A chance of showers. Partly sunny, with a high near 86.
Monday Night
A chance of showers. Mostly cloudy, with a low around 77.
Tuesday
Partly sunny, with a high near 85.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Santa Rita GU
 13.38°N 144.67°E
Last Update:
6:06 am ChST Jan 21, 2026
Forecast Valid:
1pm ChST Jan 21, 2026-6pm ChST Jan 27, 2026
 
Forecast Discussion
 
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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