Widespread Showers in the Eastern US; Severe Thunderstorms in the Plains; Heatwave in the Desert Southwest

Widespread showers and thunderstorms across much of the central and eastern U.S. will produce areas of excessive rainfall, especially in the southern Mid-Atlantic states. Scattered severe thunderstorms are expected from Montana into portions of the central/southern Plains this weekend. A heatwave will build in the Desert Southwest, in parts of Arizona, southeastern California, and southern Nevada. Read More >

Hazardous Weather Conditions

Hazardous Weather Outlook

Current conditions at

Marshalltown, Marshalltown Municipal Airport (KMIW)

Lat: 42.11°NLon: 92.92°WElev: 971ft.

Light Rain

67°F

19°C

Humidity	97%
Wind Speed	SW 6 mph
Barometer	30.04 in (1016.4 mb)
Dewpoint	66°F (19°C)
Visibility	10.00 mi
Last update	15 Jun 4:53 am CDT

More Information:

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

Extended Forecast for

Union IA

Overnight
Low: 66 °F
Chance
T-storms
Sunday
High: 83 °F
Chance
T-storms
Sunday Night
Low: 66 °F
Chance
T-storms
Monday
High: 87 °F
Slight Chance
T-storms
Monday Night
Low: 68 °F
Chance
T-storms
Tuesday
High: 85 °F
Chance
T-storms then
Showers
Likely
Tuesday Night
Low: 64 °F
T-storms
Wednesday
High: 80 °F
Chance
T-storms
Wednesday Night
Low: 61 °F
Mostly Clear

Detailed Forecast

Overnight

A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. East southeast wind around 5 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday

A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a high near 83. Calm wind becoming south around 6 mph in the afternoon. New rainfall amounts between a quarter and half of an inch possible.

Sunday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 66. South southeast wind around 6 mph. New rainfall amounts between a quarter and half of an inch possible.

Monday

A 20 percent chance of showers and thunderstorms. Partly sunny, with a high near 87. South wind 5 to 9 mph.

Monday Night

A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 68. South wind 6 to 9 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Tuesday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1pm. Partly sunny, with a high near 85. Chance of precipitation is 60%. New rainfall amounts between three quarters and one inch possible.

Tuesday Night

Showers and possibly a thunderstorm before 1am, then showers and thunderstorms likely after 1am. Low around 64. Chance of precipitation is 80%.

Wednesday

A 50 percent chance of showers and thunderstorms. Partly sunny, with a high near 80.

Wednesday Night

Mostly clear, with a low around 61.

Juneteenth

Sunny, with a high near 85.

Thursday Night

Mostly clear, with a low around 64.

Friday

Sunny, with a high near 90. Breezy.