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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >

Hazardous Weather Conditions

Current conditions at

Lamoni, Lamoni Municipal Airport (KLWD)

Lat: 40.63°NLon: 93.9°WElev: 1129ft.

Fog

70°F

21°C

Humidity 100%
Wind Speed Calm
Barometer 30.18 in (1021.5 mb)
Dewpoint 70°F (21°C)
Visibility 0.50 mi
Last update 17 Sep 6:53 am CDT
Extended Forecast for

4 Miles SSE Martinsville MO

Dense Fog Advisory until September 17, 10:00am
Click here for hazard details and duration
...
  •  
    Dense Fog Advisory until September 17, 10:00am

    NOW until 10:00am Thu

    Dense Fog Advisory

  • Today

    High: 82 °F

    Slight Chance
    T-storms and
    Areas Dense
    Fog then
    Mostly Sunny

  • Tonight

    Tonight: A slight chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 68. Northeast wind 3 to 7 mph. Chance of precipitation is 20%.

    Low: 68 °F

    Partly Cloudy
    then Slight
    Chance
    T-storms

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 85. Heat index values as high as 97. East southeast wind 8 to 11 mph becoming south in the afternoon. Winds could gust as high as 20 mph.

    High: 85 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: A chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 70. South wind around 9 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 70 °F

    Partly Cloudy
    then Chance
    T-storms

  • Saturday

    Saturday: A chance of showers and thunderstorms before 1pm, then a chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 82. South southwest wind 8 to 10 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Chance
    T-storms

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 64 °F

    Showers
    Likely

  • Sunday

    Sunday: A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 70. Chance of precipitation is 70%.

    High: 70 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.

    Low: 60 °F

    Showers
    Likely

Detailed Forecast

Today
A slight chance of showers and thunderstorms before 8am. Areas of dense fog before 11am. Otherwise, partly sunny, with a high near 82. North northeast wind 3 to 5 mph. Chance of precipitation is 20%.
Tonight
A slight chance of showers and thunderstorms after 4am. Increasing clouds, with a low around 68. Northeast wind 3 to 7 mph. Chance of precipitation is 20%.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 85. Heat index values as high as 97. East southeast wind 8 to 11 mph becoming south in the afternoon. Winds could gust as high as 20 mph.
Friday Night
A chance of showers and thunderstorms after 1am. Increasing clouds, with a low around 70. South wind around 9 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
A chance of showers and thunderstorms before 1pm, then a chance of showers between 1pm and 4pm, then a chance of showers and thunderstorms after 4pm. Partly sunny, with a high near 82. South southwest wind 8 to 10 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 64. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
A chance of showers, then showers likely and possibly a thunderstorm after 1pm. Mostly cloudy, with a high near 70. Chance of precipitation is 70%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 60. Chance of precipitation is 70%.
Monday
A chance of showers before 1pm. Mostly cloudy, with a high near 66. Chance of precipitation is 50%.
Monday Night
Mostly cloudy, with a low around 55.
Tuesday
Partly sunny, with a high near 65.
Tuesday Night
Partly cloudy, with a low around 55.
Wednesday
Partly sunny, with a high near 70.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Martinsville MO
 40.34°N 94.13°W (Elev. 1050 ft)
Last Update:
4:51 am CDT Sep 17, 2026
Forecast Valid:
7am CDT Sep 17, 2026-6pm CDT Sep 23, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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