Excessive Rainfall Potential for the Southeast; Heat Expands for Center of the Nation; Critical Fire Weather for Pacific Northwest

Flash flooding threatens areas from the Tennessee Valley to the Carolinas as storms repeat along a stalled front. Monsoonal storms may trigger flooding in the Southwest. Dangerous heat expands across the Desert Southwest, Plains, mid-Mississippi Valley and Southern Tier. Critical fire weather for interior Pacific Northwest. Cooler, drier air brings brief relief to the Great Lakes and Northeast. Read More >

Hazardous Weather Conditions

Extreme Heat Warning until July 27, 07:00 AM CDT

Current conditions at

Yankton, Chan Gurney Municipal Airport (KYKN)

Lat: 42.92°NLon: 97.38°WElev: 1306ft.

Fair

90°F

32°C

Humidity	63%
Wind Speed	SW 7 mph
Barometer	29.91 in (1012.7 mb)
Dewpoint	76°F (24°C)
Visibility	10.00 mi
Heat Index	101°F (38°C)
Last update	25 Jul 11:56 am CDT

More Information:

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

Extended Forecast for

Saint Helena NE

Extreme Heat Warning July 25, 12:32pm until July 27, 07:00am

Click here for hazard details and duration

Extreme Heat Warning

Extreme Heat Warning July 25, 12:32pm until July 27, 07:00am
NOW until 7:00am Mon
Extreme Heat Warning
This Afternoon
High: 100 °F
Hot
Tonight
Low: 75 °F
Slight Chance
T-storms
Sunday
High: 100 °F
Hot
Sunday Night
Low: 75 °F
Partly Cloudy
Monday
High: 98 °F
Hot
Monday Night
Low: 72 °F
Partly Cloudy
Tuesday
High: 95 °F
Mostly Sunny
Tuesday Night
Low: 69 °F
Mostly Clear

Detailed Forecast

This Afternoon

Mostly sunny and hot, with a high near 100. Heat index values as high as 108. West wind 5 to 7 mph becoming south southeast.

Tonight

A 20 percent chance of showers and thunderstorms, mainly between 10pm and 1am. Increasing clouds, with a low around 75. South wind 7 to 11 mph becoming northeast after midnight. Winds could gust as high as 17 mph.

Sunday

Cloudy through mid morning, then gradual clearing and hot, with a high near 100. Heat index values as high as 107. South wind 7 to 17 mph, with gusts as high as 26 mph.

Sunday Night

Partly cloudy, with a low around 75. South wind 7 to 14 mph, with gusts as high as 21 mph.

Monday

Sunny and hot, with a high near 98. Northwest wind 7 to 10 mph becoming northeast in the afternoon. Winds could gust as high as 18 mph.

Monday Night

Partly cloudy, with a low around 72. East wind 3 to 7 mph.

Tuesday

Mostly sunny, with a high near 95. East wind 5 to 7 mph.

Tuesday Night

Mostly clear, with a low around 69. South wind 6 to 8 mph.

Wednesday

Mostly sunny, with a high near 95. South southeast wind 5 to 10 mph, with gusts as high as 18 mph.