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

Tropical Storm Arthur and Heavy Rainfall in the South; Severe Weather in the Midwest

An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana tonight. Intense tornadoes, swaths of damaging gusts, and hail in excess of 2 inches in diameter possible. Tropical Storm Arthur will continue to produce strong winds across coastal Upper Texas and Louisiana tonight, as well as potentially life-threatening flooding across southern Louisiana into Mississippi. Read More >

Hazardous Weather Conditions

Current conditions at

Cattaraugus County-Olean Airport (KOLE)

Lat: 42.24°NLon: 78.37°WElev: 2135ft.

Overcast

63°F

17°C

Humidity 64%
Wind Speed Calm
Barometer 29.76 in
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 17 Jun 9:15 pm EDT
Extended Forecast for

4 Miles WSW Allegany NY

Wind Advisory June 18, 02:00am until June 18, 08:00pm
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: Showers, with thunderstorms also possible after 2am. Low around 57. South wind 6 to 11 mph increasing to 12 to 17 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 57 °F

    Showers
    Likely then
    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm before 11am, then a chance of showers between 11am and 2pm, then a slight chance of showers and thunderstorms after 2pm. High near 72. West wind 15 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 72 °F

    Showers then
    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers before 2am. Mostly cloudy, with a low around 51. West wind 7 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Chance
    Showers

  • Juneteenth

    Juneteenth: A slight chance of showers after 8am. Cloudy, then gradually becoming mostly sunny, with a high near 69. West wind 9 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    High: 69 °F

    Slight Chance
    Showers

  • Friday Night

    Friday Night: Mostly clear, with a low around 49. West wind 6 to 11 mph.

    Low: 49 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 68. West wind 8 to 10 mph, with gusts as high as 22 mph.

    High: 68 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 49. West wind around 5 mph becoming calm in the evening.

    Low: 49 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 72. Calm wind becoming west around 6 mph in the afternoon.

    High: 72 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.

    Low: 51 °F

    Showers
    Likely

Detailed Forecast

Tonight
Showers, with thunderstorms also possible after 2am. Low around 57. South wind 6 to 11 mph increasing to 12 to 17 mph after midnight. Winds could gust as high as 33 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Showers and possibly a thunderstorm before 11am, then a chance of showers between 11am and 2pm, then a slight chance of showers and thunderstorms after 2pm. High near 72. West wind 15 to 18 mph, with gusts as high as 34 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers before 2am. Mostly cloudy, with a low around 51. West wind 7 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Juneteenth
A slight chance of showers after 8am. Cloudy, then gradually becoming mostly sunny, with a high near 69. West wind 9 to 14 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Friday Night
Mostly clear, with a low around 49. West wind 6 to 11 mph.
Saturday
Sunny, with a high near 68. West wind 8 to 10 mph, with gusts as high as 22 mph.
Saturday Night
Partly cloudy, with a low around 49. West wind around 5 mph becoming calm in the evening.
Sunday
Mostly sunny, with a high near 72. Calm wind becoming west around 6 mph in the afternoon.
Sunday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.
Monday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 69. Chance of precipitation is 60%.
Monday Night
A chance of showers. Partly cloudy, with a low around 51. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 72.
Tuesday Night
Partly cloudy, with a low around 51.
Wednesday
Mostly sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles WSW Allegany NY
 42.07°N 78.56°W (Elev. 1880 ft)
Last Update:
7:57 pm EDT Jun 17, 2026
Forecast Valid:
9pm EDT Jun 17, 2026-6pm EDT Jun 24, 2026
 
Forecast Discussion
 
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Additional Resources

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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