National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Areas of Fire Weather and Severe Thunderstorms on Friday

Critical fire weather is expected Friday across the Northern Plains, Upper Midwest, and southern High Plains due to gusty winds and low humidity. Severe thunderstorms capable of large to very large hail, wind damage and tornadoes will be possible Friday and Saturday across parts of the central Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Ottumwa Regional Airport (KOTM)

Lat: 41.1°NLon: 92.44°WElev: 830ft.

Fair

58°F

14°C

Humidity 72%
Wind Speed SE 9 mph
Barometer 29.79 in (1008.3 mb)
Dewpoint 49°F (9°C)
Visibility 10.00 mi
Last update 15 May 5:53 am CDT
Extended Forecast for

Martinsburg IA

  • Today

    Today: Sunny, with a high near 88. South wind around 15 mph, with gusts as high as 25 mph.

    High: 88 °F

    Sunny

  • Tonight

    Tonight: Showers and thunderstorms likely, mainly between 1am and 3am. Increasing clouds, with a low around 64. South wind 10 to 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 64 °F

    Slight Chance
    T-storms then
    T-storms
    Likely

  • Saturday

    Saturday: A 40 percent chance of showers and thunderstorms, mainly after 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 87. South wind 5 to 10 mph.

    High: 87 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 63. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.

    Low: 63 °F

    Showers
    Likely

  • Sunday

    Sunday: Mostly sunny, with a high near 89. Breezy.

    High: 89 °F

    Mostly Sunny
    and Breezy

  • Sunday Night

    Sunday Night: A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 69. Breezy.

    Low: 69 °F

    Partly Cloudy
    and Breezy
    then Chance
    T-storms

  • Monday

    Monday: Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Partly sunny, with a high near 88. Breezy. Chance of precipitation is 70%.

    High: 88 °F

    Breezy.
    Showers
    Likely then
    T-storms
    Likely

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Partly cloudy, with a low around 65. Breezy. Chance of precipitation is 60%.

    Low: 65 °F

    Showers
    Likely and
    Breezy

  • Tuesday

    Tuesday: A 40 percent chance of showers. Partly sunny, with a high near 80. Breezy.

    High: 80 °F

    Chance
    Showers and
    Breezy

Detailed Forecast

Today
Sunny, with a high near 88. South wind around 15 mph, with gusts as high as 25 mph.
Tonight
Showers and thunderstorms likely, mainly between 1am and 3am. Increasing clouds, with a low around 64. South wind 10 to 15 mph becoming west after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
A 40 percent chance of showers and thunderstorms, mainly after 3pm. Mostly cloudy, then gradually becoming sunny, with a high near 87. South wind 5 to 10 mph.
Saturday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 7pm. Mostly cloudy, with a low around 63. Southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Sunday
Mostly sunny, with a high near 89. Breezy.
Sunday Night
A 50 percent chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 69. Breezy.
Monday
Showers likely and possibly a thunderstorm before 1pm, then showers and thunderstorms likely after 1pm. Partly sunny, with a high near 88. Breezy. Chance of precipitation is 70%.
Monday Night
Showers likely and possibly a thunderstorm before 1am, then a chance of showers. Partly cloudy, with a low around 65. Breezy. Chance of precipitation is 60%.
Tuesday
A 40 percent chance of showers. Partly sunny, with a high near 80. Breezy.
Tuesday Night
Mostly cloudy, with a low around 50.
Wednesday
Mostly sunny, with a high near 70.
Wednesday Night
Partly cloudy, with a low around 48.
Thursday
Partly sunny, with a high near 73.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Martinsburg IA
 41.18°N 92.27°W (Elev. 810 ft)
Last Update:
3:01 am CDT May 15, 2026
Forecast Valid:
6am CDT May 15, 2026-6pm CDT May 21, 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