Heat Across the Center of the Nation; Severe Thunderstorms Across the Great Lakes and Ohio Valley

Heat expands across the Desert Southwest, Plains, Mississippi Valley and Midwest into Monday. Fire weather concerns continue for portions of the Intermountain West. Active monsoonal moisture fuels thunderstorms over the Southwest with possible flash flooding. Tropical cyclone Fausto in the Pacific, should weaken as it approaches Hawaii; Dangerous surf, swells and rip currents are expected. Read More >

Hazardous Weather Conditions

Current conditions at

Denison (KDNS)

Lat: 41.98°NLon: 95.38°WElev: 1273ft.

Fair

90°F

32°C

Humidity	75%
Wind Speed	S 9 G 15 mph
Barometer	29.80 in
Dewpoint	81°F (27°C)
Visibility	NA
Heat Index	109°F (43°C)
Last update	26 Jul 7:55 pm CDT

More Information:

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

Extended Forecast for

5 Miles SW Dunlap IA

Heat Advisory July 27, 07:00am until July 27, 10:00pm

Extreme Heat Warning July 26, 08:18pm until July 27, 07:00am

Click here for hazard details and duration

Heat Advisory

Extreme Heat Warning

Extreme Heat Warning July 26, 08:18pm until July 27, 07:00am
NOW until 7:00am Mon
Extreme Heat Warning
Tonight
Low: 76 °F
Partly Cloudy
then Slight
Chance
T-storms
Monday
High: 98 °F
Hot
Monday Night
Low: 72 °F
Increasing
Clouds
Tuesday
High: 90 °F
Decreasing
Clouds
Tuesday Night
Low: 69 °F
Partly Cloudy
Wednesday
High: 91 °F
Sunny
Wednesday Night
Low: 70 °F
Mostly Clear
then Slight
Chance
T-storms
Thursday
High: 86 °F
Chance
T-storms

Detailed Forecast

Tonight

A slight chance of showers and thunderstorms between 1am and 3am. Partly cloudy, with a low around 76. South wind 6 to 11 mph, with gusts as high as 18 mph. Chance of precipitation is 20%.

Monday

Sunny and hot, with a high near 98. Heat index values as high as 107. Calm wind becoming northeast 5 to 8 mph in the afternoon.

Monday Night

Increasing clouds, with a low around 72. Northeast wind around 6 mph becoming calm in the evening.

Tuesday

Cloudy, then gradually becoming mostly sunny, with a high near 90. Calm wind becoming east southeast around 5 mph in the afternoon.

Tuesday Night

Partly cloudy, with a low around 69. Light southeast wind.

Wednesday

Sunny, with a high near 91. Calm wind becoming south southeast 5 to 7 mph in the morning.

Wednesday Night

A 20 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 70. South southeast wind 5 to 7 mph.

Thursday

A chance of showers and thunderstorms. Mostly cloudy, with a high near 86. South southeast wind 5 to 10 mph, with gusts as high as 18 mph.

Thursday Night

Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 68. South southeast wind 5 to 9 mph becoming calm after midnight.

Friday

A slight chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 84. Light north northwest wind becoming north 5 to 10 mph in the morning. Winds could gust as high as 17 mph.

Friday Night

Mostly clear, with a low around 64. North northeast wind 5 to 8 mph becoming calm in the evening.

Saturday

Mostly sunny, with a high near 84. Calm wind becoming north northeast 5 to 7 mph in the afternoon.

Saturday Night

Mostly clear, with a low around 63. East northeast wind around 5 mph becoming calm in the evening.

Sunday

Sunny, with a high near 86. Calm wind becoming south southeast 5 to 7 mph in the afternoon.