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Preliminary Storm Summary of May 21 Tornadoes and Flash Floods Across Iowa
National Water Prediction Service Replaces Advanced Hydrologic Prediction Service

Current conditions at

Knoxville (KOXV)

Lat: 41.3°NLon: 93.12°WElev: 928ft.

Fair

66°F

19°C

Humidity	49%
Wind Speed	SE 5 mph
Barometer	30.14 in
Dewpoint	46°F (8°C)
Visibility	10.00 mi
Last update	29 May 9:35 pm CDT

More Information:

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

Extended Forecast for

4 Miles WNW Marysville IA

Tonight
Low: 52 °F
Clear
Thursday
High: 77 °F
Mostly Sunny
Thursday Night
Low: 59 °F
Mostly Cloudy
then Slight
Chance
T-storms
Friday
High: 73 °F
Showers
Likely
Friday Night
Low: 59 °F
Chance
T-storms
Saturday
High: 78 °F
Chance
Showers
Saturday Night
Low: 59 °F
Partly Cloudy
Sunday
High: 82 °F
Slight Chance
T-storms
Sunday Night
Low: 65 °F
Partly Cloudy
then Chance
T-storms

Detailed Forecast

Tonight

Clear, with a low around 52. East southeast wind around 6 mph.

Thursday

Mostly sunny, with a high near 77. Southeast wind 7 to 14 mph, with gusts as high as 21 mph.

Thursday Night

A slight chance of showers and thunderstorms between 1am and 4am, then a slight chance of showers after 4am. Increasing clouds, with a low around 59. Southeast wind 8 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

Friday

A chance of showers before 7am, then a chance of showers and thunderstorms between 7am and 1pm, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 73. South southeast wind 10 to 13 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

Friday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. East wind around 8 mph. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.

Saturday

A chance of showers, with thunderstorms also possible after 7am. Partly sunny, with a high near 78. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday Night

Partly cloudy, with a low around 59.

Sunday

A 20 percent chance of showers and thunderstorms. Mostly sunny, with a high near 82.

Sunday Night

A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 65.

Monday

A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.

Monday Night

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 65.

Tuesday

A 30 percent chance of showers and thunderstorms. Mostly sunny, with a high near 85.