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

Excessive Rainfall and Significant Flooding in the Upper Midwest This Weekend

Heavy to excessive rainfall is expected over the weekend across eastern Iowa, northern Missouri, northwest Illinois and southern Wisconsin. Numerous flash floods, some with significant impacts, are expected in these areas. Heaviest rainfall will occur overnight Saturday and Sunday, so be sure to have multiple ways to receive warnings. Read More >

Hazardous Weather Conditions

Current conditions at

Niagara Falls, Niagara Falls International Airport (KIAG)

Lat: 43.11°NLon: 78.94°WElev: 587ft.

Fair

69°F

21°C

Humidity 90%
Wind Speed Calm
Barometer 30.15 in (1020.3 mb)
Dewpoint 66°F (19°C)
Visibility 8.00 mi
Last update 10 Aug 2:53 am EDT
Extended Forecast for

Lewiston NY

  • Overnight

    Overnight: Partly cloudy, with a low around 72. South wind around 6 mph.

    Low: 72 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny and hot, with a high near 92. Southwest wind 7 to 9 mph.

    High: 92 °F

    Hot

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 71. South wind 3 to 6 mph.

    Low: 71 °F

    Mostly Clear

  • Monday

    Monday: Sunny and hot, with a high near 92. Heat index values as high as 95. Southwest wind 6 to 8 mph.

    High: 92 °F

    Hot

  • Monday Night

    Monday Night: Mostly clear, with a low around 72. South wind around 6 mph.

    Low: 72 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 92. Southwest wind 7 to 11 mph. Chance of precipitation is 20%.

    High: 92 °F

    Sunny then
    Slight Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 70. Southwest wind 6 to 8 mph. Chance of precipitation is 50%.

    Low: 70 °F

    Chance
    Showers then
    Chance
    T-storms

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 87. West wind 7 to 10 mph. Chance of precipitation is 40%.

    High: 87 °F

    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of thunderstorms before 8pm. Partly cloudy, with a low around 65. Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 72. South wind around 6 mph.
Sunday
Sunny and hot, with a high near 92. Southwest wind 7 to 9 mph.
Sunday Night
Mostly clear, with a low around 71. South wind 3 to 6 mph.
Monday
Sunny and hot, with a high near 92. Heat index values as high as 95. Southwest wind 6 to 8 mph.
Monday Night
Mostly clear, with a low around 72. South wind around 6 mph.
Tuesday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 92. Southwest wind 7 to 11 mph. Chance of precipitation is 20%.
Tuesday Night
A chance of showers between 8pm and 2am, then a chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 70. Southwest wind 6 to 8 mph. Chance of precipitation is 50%.
Wednesday
A chance of showers and thunderstorms before 8am, then a chance of showers between 8am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 87. West wind 7 to 10 mph. Chance of precipitation is 40%.
Wednesday Night
A chance of thunderstorms before 8pm. Partly cloudy, with a low around 65. Chance of precipitation is 30%.
Thursday
Mostly sunny, with a high near 83.
Thursday Night
Mostly clear, with a low around 63.
Friday
Sunny, with a high near 87.
Friday Night
Mostly clear, with a low around 67.
Saturday
Sunny and hot, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Lewiston NY
 43.19°N 79.06°W (Elev. 295 ft)
Last Update:
1:37 am EDT Aug 10, 2025
Forecast Valid:
3am EDT Aug 10, 2025-6pm EDT Aug 16, 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