Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that little-to-no relief from the scorching daytime highs will be available. Read More >

Hazardous Weather Conditions

Dense Fog Advisory in effect from August 20, 02:17 AM CDT until August 20, 10:00 AM CDT

Current conditions at

Yankton, Chan Gurney Municipal Airport (KYKN)

Lat: 42.92°NLon: 97.38°WElev: 1306ft.

Fair

65°F

18°C

Humidity	97%
Wind Speed	S 5 mph
Barometer	30.03 in (1017.4 mb)
Dewpoint	64°F (18°C)
Visibility	10.00 mi
Last update	20 Aug 1:56 am CDT

More Information:

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

Extended Forecast for

Center NE

Dense Fog Advisory until August 20, 10:00am

Click here for hazard details and duration

Dense Fog Advisory

Dense Fog Advisory until August 20, 10:00am
NOW until 10:00am Thu
Dense Fog Advisory
Overnight
Low: 64 °F
Clear
Thursday
High: 86 °F
Sunny then
Slight Chance
T-storms
Thursday Night
Low: 64 °F
Slight Chance
T-storms then
Mostly Clear
Friday
High: 86 °F
Sunny then
Slight Chance
T-storms
Friday Night
Low: 62 °F
Chance
T-storms then
Chance
Showers
Saturday
High: 82 °F
Sunny
Saturday Night
Low: 61 °F
Partly Cloudy
Sunday
High: 78 °F
Chance
Showers

Detailed Forecast

Overnight

Clear, with a steady temperature around 64. South wind 3 to 6 mph.

Thursday

A slight chance of showers between 3pm and 4pm, then a slight chance of showers and thunderstorms after 4pm. Increasing clouds, with a high near 86. South southwest wind 6 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

Thursday Night

A 20 percent chance of showers and thunderstorms before 8pm. Mostly clear, with a low around 64. South southwest wind 5 to 8 mph becoming calm in the evening.

Friday

A slight chance of showers before 4pm, then a slight chance of showers and thunderstorms between 4pm and 5pm. Sunny, with a high near 86. Calm wind becoming southeast 5 to 7 mph in the afternoon. Chance of precipitation is 20%.

Friday Night

A 30 percent chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 62. East southeast wind around 6 mph becoming calm in the evening. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday

Sunny, with a high near 82. Calm wind becoming northeast 5 to 7 mph in the morning.

Saturday Night

Partly cloudy, with a low around 61. East wind 3 to 6 mph.

Sunday

A chance of showers, with thunderstorms also possible after 1pm. Partly sunny, with a high near 78. South southeast wind 6 to 15 mph, with gusts as high as 22 mph.

Sunday Night

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Mostly cloudy, with a low around 63. South southeast wind 13 to 16 mph, with gusts as high as 25 mph.

Monday

A slight chance of showers and thunderstorms before 1pm. Mostly sunny, with a high near 83. South wind 10 to 15 mph, with gusts as high as 23 mph.

Monday Night

Partly cloudy, with a low around 65. South southeast wind 6 to 9 mph.

Tuesday

A slight chance of showers and thunderstorms. Mostly sunny, with a high near 84. West southwest wind 5 to 9 mph becoming northwest in the afternoon.

Tuesday Night

A chance of showers and thunderstorms. Partly cloudy, with a low around 63. West northwest wind around 6 mph becoming calm in the evening.

Wednesday

Mostly sunny, with a high near 82. North northwest wind 3 to 8 mph.