Extreme Heat Across the Southern U.S.; Severe Thunderstorms and Heavy Rain in the Plains and Mississippi Valley

A heat wave over the Southwest will intensify late week, peaking and expanding into the Intermountain West and northern High Plains this weekend. Severe thunderstorms and heavy rain are expected over portions of the Plains and Mississippi Valley tonight, which will shift to parts of the Upper Midwest and mid-Mississippi Valley Friday. Monsoonal showers and flooding persist in the Desert Southwest. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Denison (KDNS)

Lat: 41.98°NLon: 95.38°WElev: 1273ft.

Mostly Cloudy

75°F

24°C

Humidity	94%
Wind Speed	SE 9 mph
Barometer	29.91 in
Dewpoint	73°F (23°C)
Visibility	NA
Last update	30 Jul 8:35 pm CDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Denison IA

Tonight
Low: 67 °F
Chance
T-storms then
Heavy Rain
Friday
High: 77 °F
Chance
Showers and
Breezy
Friday Night
Low: 58 °F
Chance
Showers and
Breezy then
Partly Cloudy
Saturday
High: 80 °F
Sunny
Saturday Night
Low: 58 °F
Mostly Clear
Sunday
High: 82 °F
Sunny
Sunday Night
Low: 60 °F
Mostly Clear
Monday
High: 84 °F
Sunny
Monday Night
Low: 63 °F
Mostly Clear

Detailed Forecast

Tonight

Showers and thunderstorms likely, then showers and possibly a thunderstorm after 1am. Some of the storms could produce heavy rainfall. Low around 67. South wind 7 to 9 mph. Chance of precipitation is 90%. New rainfall amounts between three quarters and one inch possible.

Friday

A chance of showers and thunderstorms. Mostly cloudy, with a high near 77. Breezy, with a north wind 7 to 12 mph increasing to 15 to 20 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Friday Night

A 30 percent chance of showers before 7pm. Partly cloudy, with a low around 58. Breezy, with a north wind 11 to 20 mph, with gusts as high as 32 mph. New precipitation amounts of less than a tenth of an inch possible.

Saturday

Sunny, with a high near 80. North wind 11 to 14 mph, with gusts as high as 24 mph.

Saturday Night

Mostly clear, with a low around 58. North northeast wind 5 to 8 mph becoming calm in the evening.

Sunday

Sunny, with a high near 82.

Sunday Night

Mostly clear, with a low around 60.

Monday

Sunny, with a high near 84.

Monday Night

Mostly clear, with a low around 63.