Severe Thunderstorms Possible for the Great Lakes into Ohio Valley; Heavy to Excessive Rainfall Over the Southern Plains

Severe thunderstorms will race along a cold front from the Upper Mississippi Valley into the Great Lakes and Ohio Valley with the main threat being damaging winds. The tail end of this front will possibly produce heavy to excessive rainfall across the southern Plains into the Lower Mississippi Valley through Saturday. Finally, Major-to-record river flooding continues across the Carolinas. Read More >

Hazardous Weather Conditions

Current conditions at

Penn Yan, Penn Yan Airport (KPEO)

Lat: 42.64° N Lon: 77.05° W Elev: 902 ft.

Mostly Cloudy



Humidity 90%
Wind Speed Calm
Barometer 30.15 in (1020.6 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 20 Sep 9:53 pm EDT
Detailed forecast for

Seneca County

Mostly cloudy. Isolated showers after midnight. Lows in the mid 60s. South winds 10 to 15 mph. Chance of rain 20 percent.
Partly sunny. Isolated showers in the morning, then scattered showers and thunderstorms in the afternoon. Highs in the lower 80s. South winds 15 to 20 mph with gusts up to 30 mph. Chance of rain 40 percent.
Friday Night
Mostly cloudy. Showers likely with scattered thunderstorms in the evening, then scattered showers after midnight. Some thunderstorms may produce gusty winds and heavy rainfall in the evening. Lows in the mid 50s. Southwest winds 15 to 20 mph with gusts up to 30 mph, becoming west around 10 mph with gusts up to 20 mph after midnight. Chance of rain 60 percent.
Mostly cloudy in the morning, then becoming partly sunny. Less humid with highs in the lower 60s. North winds 5 to 10 mph.
Saturday Night
Partly cloudy in the evening then clearing. Lows in the mid 40s. West winds around 5 mph.
Sunny. Highs in the mid 60s.
Sunday Night
Mostly clear. Lows in the upper 40s.
Sunny. Highs in the upper 60s.
Monday Night
Mostly cloudy with a 50 percent chance of showers. Lows in the mid 50s.
Mostly cloudy with a chance of showers. Highs in the lower 70s. Chance of rain 50 percent.
Tuesday Night
Showers likely. Lows in the lower 60s. Chance of rain 60 percent.
Showers likely. Highs in the mid 70s. Chance of rain 60 percent.
Wednesday Night
Mostly cloudy. Lows in the mid 50s.
Mostly sunny. Highs in the upper 60s.

Click Map For Forecast
730 PM EDT Thu Sep 20 2018

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database