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

Heat in the Central U.S.; Heavy Rain Possible for South Texas; Monitoring Erin Tropical Impacts

Hot temperatures are forecast over the Plains and into the lower Mississippi River Valley Friday where Heat Advisories have been issued. Heavy rain from a disturbance in the western Gulf could bring flooding to south Texas. Erin could bring tropical storm conditions and heavy rain to Puerto Rico and the USVI this weekend with dangerous surf and rip currents impacting the western Atlantic Basin. Read More >

Current conditions at

Portland Municipal Airport (KPLD)

Lat: 40.45°NLon: 84.99°WElev: 925ft.

Mostly Cloudy

66°F

19°C

Humidity 96%
Wind Speed Calm
Barometer 30.10 in
Dewpoint 64°F (18°C)
Visibility 7.00 mi
Last update 15 Aug 4:35 am EDT
Extended Forecast for

Keystone IN

  • Today

    Today: Mostly sunny, with a high near 88. Calm wind.

    High: 88 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Clear

  • Saturday

    Saturday: A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90. Heat index values as high as 98. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 90 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Saturday Night

    Saturday Night: A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 72. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 72 °F

    Slight Chance
    T-storms

  • Sunday

    Sunday: A 30 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny and hot, with a high near 90. West wind around 5 mph.

    High: 90 °F

    Chance
    T-storms

  • Sunday Night

    Sunday Night: A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 69.

    Low: 69 °F

    Chance
    T-storms

  • Monday

    Monday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Monday Night

    Monday Night: A 30 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 70.

    Low: 70 °F

    Chance
    T-storms

  • Tuesday

    Tuesday: A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 89.

    High: 89 °F

    Chance
    T-storms

Detailed Forecast

Today
Mostly sunny, with a high near 88. Calm wind.
Tonight
Mostly clear, with a low around 68. Calm wind.
Saturday
A 20 percent chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 90. Heat index values as high as 98. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
A slight chance of showers and thunderstorms before 8pm, then a slight chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 72. Southwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Sunday
A 30 percent chance of showers and thunderstorms, mainly after 2pm. Partly sunny and hot, with a high near 90. West wind around 5 mph.
Sunday Night
A 30 percent chance of showers and thunderstorms, mainly before 8pm. Partly cloudy, with a low around 69.
Monday
Mostly sunny, with a high near 89.
Monday Night
A 30 percent chance of showers and thunderstorms, mainly after 2am. Partly cloudy, with a low around 70.
Tuesday
A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 89.
Tuesday Night
A 40 percent chance of showers and thunderstorms. Partly cloudy, with a low around 68.
Wednesday
A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 83.
Wednesday Night
Partly cloudy, with a low around 63.
Thursday
Mostly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Keystone IN
 40.6°N 85.25°W (Elev. 846 ft)
Last Update:
4:15 am EDT Aug 15, 2025
Forecast Valid:
4am EDT Aug 15, 2025-6pm EDT Aug 21, 2025
 
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