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

Heavy Rain in the Southern Appalachians; Fire Weather and Heat in the West; Monitoring Tropical Storm Erin

Heavy to excessive rainfall over the southern Appalachians may bring areas of flooding today. Gusty winds and low relative humidity will bring critical fire weather conditions to parts of the Great Basin and northern Rockies today and Thursday. Hot to extremely hot temperatures are in place through today across parts of the western U.S. Read More >

Hazardous Weather Conditions

Current conditions at

Fletcher Field, Clarksdale (KCKM)

Lat: 34.3°NLon: 90.51°WElev: 173ft.

N/A

Humidity NA
Wind Speed Calm
Barometer 29.97 in
Dewpoint N/A
Visibility 9.00 mi
Last update 13 Aug 7:55 am CDT
Extended Forecast for

Lyon MS

Heat Advisory August 13, 11:00am until August 13, 07:00pm
Click here for hazard details and duration
Heat Advisory

  • Today

    Today: A 30 percent chance of showers and thunderstorms, mainly after 2pm. Sunny, with a high near 95. Heat index values as high as 105. Calm wind becoming northwest around 5 mph in the afternoon.

    High: 95 °F

    Sunny then
    Chance
    T-storms

  • Tonight

    Tonight: A 20 percent chance of showers and thunderstorms before 10pm. Patchy fog before 4am, then patchy fog after 5am. Otherwise, mostly clear, with a low around 73. West wind around 5 mph becoming calm.

    Low: 73 °F

    Slight Chance
    T-storms then
    Patchy Fog

  • Thursday

    Thursday: A 40 percent chance of showers and thunderstorms after 1pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 93. Heat index values as high as 105. Calm wind becoming south around 5 mph.

    High: 93 °F

    Patchy Fog
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Patchy fog after 3am. Otherwise, partly cloudy, with a low around 73. Calm wind. Chance of precipitation is 20%.

    Low: 73 °F

    Slight Chance
    T-storms and
    Patchy Fog

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after 10am. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 94. Calm wind. Chance of precipitation is 30%.

    High: 94 °F

    Chance
    T-storms and
    Patchy Fog

  • Friday Night

    Friday Night: Patchy fog between 3am and 4am. Otherwise, mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 1pm. Patchy fog before 8am. Otherwise, sunny and hot, with a high near 97. Calm wind.

    High: 97 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 74. Calm wind.

    Low: 74 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

Detailed Forecast

Today
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Sunny, with a high near 95. Heat index values as high as 105. Calm wind becoming northwest around 5 mph in the afternoon.
Tonight
A 20 percent chance of showers and thunderstorms before 10pm. Patchy fog before 4am, then patchy fog after 5am. Otherwise, mostly clear, with a low around 73. West wind around 5 mph becoming calm.
Thursday
A 40 percent chance of showers and thunderstorms after 1pm. Patchy fog before 9am. Otherwise, mostly sunny, with a high near 93. Heat index values as high as 105. Calm wind becoming south around 5 mph.
Thursday Night
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers between 10pm and 1am. Patchy fog after 3am. Otherwise, partly cloudy, with a low around 73. Calm wind. Chance of precipitation is 20%.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 10am. Patchy fog before 8am. Otherwise, mostly sunny, with a high near 94. Calm wind. Chance of precipitation is 30%.
Friday Night
Patchy fog between 3am and 4am. Otherwise, mostly clear, with a low around 74. Calm wind.
Saturday
A 20 percent chance of showers and thunderstorms after 1pm. Patchy fog before 8am. Otherwise, sunny and hot, with a high near 97. Calm wind.
Saturday Night
Mostly clear, with a low around 74. Calm wind.
Sunday
Sunny and hot, with a high near 97.
Sunday Night
Mostly clear, with a low around 74.
Monday
Sunny and hot, with a high near 97.
Monday Night
Mostly clear, with a low around 74.
Tuesday
Sunny and hot, with a high near 97.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lyon MS
 34.22°N 90.53°W (Elev. 164 ft)
Last Update:
6:45 am CDT Aug 13, 2025
Forecast Valid:
8am CDT Aug 13, 2025-6pm CDT Aug 19, 2025
 
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