National Weather Service

News Headlines

Information on the severe weather that occurred on Saturday, July 18th, 2026

Hazardous Weather Conditions

Current conditions at

Somerset County Airport (K2G9)

Lat: 40.04°NLon: 79.02°WElev: 2275ft.

Fog

61°F

16°C

Humidity	100%
Wind Speed	Calm
Barometer	30.21 in
Dewpoint	61°F (16°C)
Visibility	0.50 mi
Last update	15 Aug 4:15 am EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

Addison PA

Dense Fog Advisory until August 15, 09:00am

Click here for hazard details and duration

Dense Fog Advisory

Dense Fog Advisory until August 15, 09:00am
NOW until 9:00am Sat
Dense Fog Advisory
Overnight
Low: 63 °F
Areas Dense
Fog
Saturday
High: 80 °F
Areas Dense
Fog then
Mostly Sunny
Saturday Night
Low: 68 °F
Mostly Cloudy
then Chance
T-storms
Sunday
High: 79 °F
Showers
Sunday Night
Low: 69 °F
Showers
Monday
High: 78 °F
Showers
Likely
Monday Night
Low: 60 °F
Chance
Showers then
Partly Cloudy
Tuesday
High: 76 °F
Sunny

Detailed Forecast

Overnight

Areas of dense fog. Otherwise, mostly cloudy, with a low around 63. Calm wind.

Saturday

Areas of dense fog before 8am. Otherwise, mostly sunny, with a high near 80. Calm wind.

Saturday Night

A slight chance of showers between 1am and 2am, then a chance of showers and thunderstorms after 2am. Increasing clouds, with a low around 68. Calm wind. Chance of precipitation is 50%. New rainfall amounts between a quarter and half of an inch possible.

Sunday

Showers and possibly a thunderstorm, mainly before 5pm, then a chance of showers and thunderstorms after 5pm. High near 79. South wind 5 to 9 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

Sunday Night

Showers and thunderstorms likely before 8pm, then showers and possibly a thunderstorm between 8pm and 2am, then a chance of showers after 2am. Low around 69. West wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Monday

Showers likely, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 78. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Monday Night

A chance of showers before 8pm. Partly cloudy, with a low around 60. Chance of precipitation is 30%.

Tuesday

Sunny, with a high near 76.

Tuesday Night

Mostly clear, with a low around 60.

Wednesday

Sunny, with a high near 80.

Wednesday Night

A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 50%.

Thursday

A chance of showers. Partly sunny, with a high near 76. Chance of precipitation is 40%.