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Severe Thunderstorm and Heavy Rainfall Threat Tonight; Heat Continues on Tuesday Across the Eastern U.S.

Severe weather and flash flooding threats continue across the Central Plains and Midwest into tonight. Very large hail, strong tornadoes and damaging winds are expected. An early season heat wave will continue to challenge temperature records across the eastern U.S. through Wednesday. Read More >

Hazardous Weather Conditions

Current conditions at

Monticello Regional Airport (KMXO)

Lat: 42.22°NLon: 91.16°WElev: 827ft.

Overcast

70°F

21°C

Humidity 94%
Wind Speed SE 9 mph
Barometer 29.82 in
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 18 May 10:15 pm CDT
Extended Forecast for

Ryan IA

Severe T-storm Watch May 18, 11:05pm until May 19, 04:00am
Click here for hazard details and duration
Severe T-storm Watch
  •  
    Severe T-storm Watch May 18, 11:05pm until May 19, 04:00am

    NOW until 4:00am Tue

    Severe T-storm Watch

  • Tonight

    Low: 59 °F

    T-storms
    Likely

  • Tuesday

    Tuesday: A 30 percent chance of showers and thunderstorms before 8am. Mostly cloudy, with a high near 64. Northwest wind around 15 mph, with gusts as high as 25 mph.

    High: 64 °F

    Chance
    T-storms then
    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 42. North wind 10 to 15 mph, with gusts as high as 20 mph.

    Low: 42 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 63. Northeast wind 5 to 10 mph.

    High: 63 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 63.

    High: 63 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers after 1am. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy
    then Chance
    Showers

  • Friday

    Friday: A 50 percent chance of showers. Mostly cloudy, with a high near 64.

    High: 64 °F

    Chance
    Showers

Detailed Forecast

Tonight
Showers and thunderstorms likely, mainly before 4am. Mostly cloudy, with a low around 59. South wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A 30 percent chance of showers and thunderstorms before 8am. Mostly cloudy, with a high near 64. Northwest wind around 15 mph, with gusts as high as 25 mph.
Tuesday Night
Partly cloudy, with a low around 42. North wind 10 to 15 mph, with gusts as high as 20 mph.
Wednesday
Sunny, with a high near 63. Northeast wind 5 to 10 mph.
Wednesday Night
Mostly cloudy, with a low around 43.
Thursday
Partly sunny, with a high near 63.
Thursday Night
A 50 percent chance of showers after 1am. Mostly cloudy, with a low around 45.
Friday
A 50 percent chance of showers. Mostly cloudy, with a high near 64.
Friday Night
A 40 percent chance of showers before 1am. Mostly cloudy, with a low around 48.
Saturday
Partly sunny, with a high near 73.
Saturday Night
Mostly cloudy, with a low around 53.
Sunday
Mostly sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 57.
Memorial Day
Mostly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ryan IA
 42.36°N 91.47°W (Elev. 984 ft)
Last Update:
10:02 pm CDT May 18, 2026
Forecast Valid:
11pm CDT May 18, 2026-6pm CDT May 25, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation