Thunderstorms and Heavy Rainfall in the Plains; Hazardous Heat in the South and Southeast

Severe thunderstorms will be possible across the northern/central Plains through Tuesday afternoon and from the central Plains to the Mid-Mississippi Valley Tuesday evening through Wednesday morning. Storms may produce large hail and damaging wind gusts, and heavy rainfall may lead to scattered instances of flash flooding. Meanwhile, hazardous heat persists across the South and Southeast. Read More >

Current conditions at

Cattaraugus County-Olean Airport (KOLE)

Lat: 42.24°NLon: 78.37°WElev: 2135ft.

Partly Cloudy

61°F

16°C

Humidity 100%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 18 Aug 12:35 am EDT
Extended Forecast for

4 Miles SW Allegany NY

  • Overnight

    Overnight: Patchy fog after 2am.  Otherwise, mostly cloudy, with a low around 55. Calm wind.

    Low: 55 °F

    Patchy Fog

  • Tuesday

    Tuesday: Areas of fog before 9am.  Otherwise, mostly sunny, with a high near 76. Calm wind becoming northwest around 6 mph in the afternoon.

    High: 76 °F

    Areas Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 55. Light and variable wind.

    Low: 55 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers, then showers and possibly a thunderstorm after 2pm.  High near 74. West wind 5 to 8 mph.  Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Chance
    Showers then
    Showers

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 8pm.  Low around 53. Light west wind.  Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 53 °F

    Showers then
    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 74. Light north wind.

    High: 74 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 50. Light and variable wind.

    Low: 50 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 77. Calm wind.

    High: 77 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

Detailed Forecast

Overnight
Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 55. Calm wind.
Tuesday
Areas of fog before 9am. Otherwise, mostly sunny, with a high near 76. Calm wind becoming northwest around 6 mph in the afternoon.
Tuesday Night
Partly cloudy, with a low around 55. Light and variable wind.
Wednesday
A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 74. West wind 5 to 8 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and possibly a thunderstorm before 8pm. Low around 53. Light west wind. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
Mostly sunny, with a high near 74. Light north wind.
Thursday Night
Mostly clear, with a low around 50. Light and variable wind.
Friday
Sunny, with a high near 77. Calm wind.
Friday Night
Partly cloudy, with a low around 55.
Saturday
A chance of showers after 2pm. Mostly sunny, with a high near 77. Chance of precipitation is 50%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 56. Chance of precipitation is 50%.
Sunday
Showers likely. Mostly cloudy, with a high near 73. Chance of precipitation is 70%.
Sunday Night
Showers likely. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.
Monday
A chance of showers. Partly sunny, with a high near 71. Chance of precipitation is 40%.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SW Allegany NY
 42.05°N 78.53°W (Elev. 1801 ft)
9:57 pm EDT Aug 17, 2026
12am EDT Aug 18, 2026-6pm EDT Aug 24, 2026
 
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