Excessive Rainfall and Tropical Storm in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce considerable, potentially life-threatening, flooding across the lower Mississippi River Valley and central Great Lakes region through tonight. Tropical Storm Arthur will move northeastward along the Texas coast today and then move inland over southwestern Louisiana by tonight. An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana. Read More >

Current conditions at

Fort Collins/Loveland - Northern Colorado Regional Airport (KFNL)

Lat: 40.45°NLon: 105.02°WElev: 5016ft.

Fair

90°F

32°C

Humidity 19%
Wind Speed SE 10 G 21 mph
Barometer 29.74 in (998.0 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 17 Jun 2:56 pm MDT
Extended Forecast for

Johnstown CO

  • This Afternoon

    This Afternoon: Sunny, with a high near 94. Breezy, with a west northwest wind 14 to 17 mph, with gusts as high as 28 mph.

    High: 94 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Mostly clear, with a low around 54. Breezy, with a northwest wind 13 to 18 mph becoming light and variable  after midnight. Winds could gust as high as 30 mph.

    Low: 54 °F

    Mostly Clear
    and Breezy
    then Mostly
    Clear

  • Thursday

    Thursday: Sunny, with a high near 89. Light east wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 15 mph.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 57. Breezy, with an east wind 8 to 17 mph becoming north northwest after midnight. Winds could gust as high as 31 mph.

    Low: 57 °F

    Mostly Clear
    then
    Increasing
    Clouds and
    Breezy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 90. Breezy, with a north wind 9 to 17 mph becoming east in the afternoon. Winds could gust as high as 31 mph.

    High: 90 °F

    Partly Sunny
    and Breezy
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 96. Breezy.

    High: 96 °F

    Mostly Sunny
    then Mostly
    Sunny and
    Breezy

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 57. Breezy.

    Low: 57 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after noon.  Mostly sunny, with a high near 90. Breezy.

    High: 90 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms and
    Breezy

Detailed Forecast

This Afternoon
Sunny, with a high near 94. Breezy, with a west northwest wind 14 to 17 mph, with gusts as high as 28 mph.
Tonight
Mostly clear, with a low around 54. Breezy, with a northwest wind 13 to 18 mph becoming light and variable after midnight. Winds could gust as high as 30 mph.
Thursday
Sunny, with a high near 89. Light east wind increasing to 5 to 9 mph in the morning. Winds could gust as high as 15 mph.
Thursday Night
Increasing clouds, with a low around 57. Breezy, with an east wind 8 to 17 mph becoming north northwest after midnight. Winds could gust as high as 31 mph.
Juneteenth
Mostly sunny, with a high near 90. Breezy, with a north wind 9 to 17 mph becoming east in the afternoon. Winds could gust as high as 31 mph.
Friday Night
Mostly clear, with a low around 58.
Saturday
Mostly sunny, with a high near 96. Breezy.
Saturday Night
Mostly clear, with a low around 57. Breezy.
Sunday
A slight chance of showers and thunderstorms after noon. Mostly sunny, with a high near 90. Breezy.
Sunday Night
A chance of showers and thunderstorms before midnight. Mostly cloudy, with a low around 54. Breezy.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 86.
Monday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 54.
Tuesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
Johnstown CO
 40.33°N 104.93°W (Elev. 4846 ft)
12:46 pm MDT Jun 17, 2026
2pm MDT Jun 17, 2026-6pm MDT Jun 23, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database