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

Severe Thunderstorms and Heavy Rainfall Across the Central Plains and Central Appalachians

Severe thunderstorms producing damaging winds, heavy rainfall, hail and possibly a few tornadoes will continue through tonight across portions of Kansas and Oklahoma. Heavy rainfall will persist across the Central Appalachians through tonight, potentially leading to areas of flooding. The severe weather and heavy rainfall threat will shift into the lower Great Lakes on Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Denison (KDNS)

Lat: 41.98°NLon: 95.38°WElev: 1273ft.

A Few Clouds

63°F

17°C

Humidity 100%
Wind Speed E 3 mph
Barometer 29.85 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 18 Jun 1:15 am CDT
Extended Forecast for

2 Miles ENE Castana IA

  • Overnight

    Overnight: A chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 66. Northeast wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers, then a chance of showers and thunderstorms after 7am. Cloudy, then gradually becoming mostly sunny, with a high near 79. North wind 7 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A 30 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 58. North northwest wind around 6 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    Chance
    T-storms then
    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 89. Light south southwest wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 89 °F

    Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 70. South wind 9 to 13 mph, with gusts as high as 23 mph.

    Low: 70 °F

    Mostly Clear
    then Slight
    Chance
    T-storms

  • Friday

    Friday: Sunny, with a high near 95. Breezy, with a south wind 13 to 20 mph, with gusts as high as 33 mph.

    High: 95 °F

    Sunny then
    Sunny and
    Breezy

  • Friday Night

    Friday Night: Mostly clear, with a low around 76. Breezy, with a south wind around 18 mph, with gusts as high as 33 mph.

    Low: 76 °F

    Clear and
    Breezy then
    Mostly Clear

  • Saturday

    Saturday: Sunny and hot, with a high near 98. Breezy, with a south wind 16 to 21 mph, with gusts as high as 34 mph.

    High: 98 °F

    Hot and
    Breezy

  • Saturday Night

    Saturday Night: Clear, with a low around 76. Breezy, with a south wind 16 to 18 mph, with gusts as high as 33 mph.

    Low: 76 °F

    Clear and
    Breezy

Detailed Forecast

Overnight
A chance of showers and thunderstorms. Mostly cloudy, with a steady temperature around 66. Northeast wind around 6 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
A slight chance of showers, then a chance of showers and thunderstorms after 7am. Cloudy, then gradually becoming mostly sunny, with a high near 79. North wind 7 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
A 30 percent chance of showers and thunderstorms before 7pm. Mostly clear, with a low around 58. North northwest wind around 6 mph becoming calm in the evening. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Juneteenth
Sunny, with a high near 89. Light south southwest wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Thursday Night
A 20 percent chance of showers and thunderstorms after 1am. Mostly clear, with a low around 70. South wind 9 to 13 mph, with gusts as high as 23 mph.
Friday
Sunny, with a high near 95. Breezy, with a south wind 13 to 20 mph, with gusts as high as 33 mph.
Friday Night
Mostly clear, with a low around 76. Breezy, with a south wind around 18 mph, with gusts as high as 33 mph.
Saturday
Sunny and hot, with a high near 98. Breezy, with a south wind 16 to 21 mph, with gusts as high as 34 mph.
Saturday Night
Clear, with a low around 76. Breezy, with a south wind 16 to 18 mph, with gusts as high as 33 mph.
Sunday
Sunny, with a high near 96. Breezy, with a south wind 18 to 21 mph, with gusts as high as 36 mph.
Sunday Night
A slight chance of showers and thunderstorms. Mostly clear, with a low around 71. South wind around 15 mph, with gusts as high as 29 mph.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. South wind around 14 mph, with gusts as high as 24 mph.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. South wind 7 to 10 mph, with gusts as high as 20 mph.
Tuesday
Showers and thunderstorms likely. Partly sunny, with a high near 86. South wind 7 to 9 mph, with gusts as high as 17 mph.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Castana IA
 42.09°N 95.88°W (Elev. 1119 ft)
Last Update:
1:05 am CDT Jun 18, 2025
Forecast Valid:
1am CDT Jun 18, 2025-6pm CDT Jun 24, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation