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

Strong Storm System Brings Heavy Mountain Snow to the Sierra Nevada and Critical Fire Weather Conditions to the Plains

A Pacific storm system will continue to bring low elevation rain and mountain snow to much of the West through Wednesday, with heavy mountain snow expected in the higher elevations of the Sierra Nevada. This system will also bring strong winds to the Intermountain West, Rockies, and Plains, which will create Critical fire weather conditions for the High Plains. Read More >

Current conditions at

Lancaster, Lancaster Airport (KLNS)

Lat: 40.12°NLon: 76.29°WElev: 397ft.

Fair

54°F

12°C

Humidity 40%
Wind Speed SE 12 mph
Barometer 30.17 in (1021.7 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 21 Apr 6:53 pm EDT
Extended Forecast for

Mount Gretna PA

  • Tonight

    Tonight: Increasing clouds, with a low around 44. South wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 44 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: A chance of showers, mainly before 9am. Cloudy through mid morning, then gradual clearing, with a high near 67. South wind around 6 mph becoming northwest in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 67 °F

    Chance
    Showers then
    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 49. Light and variable wind becoming north around 5 mph after midnight.

    Low: 49 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 72. Northwest wind 5 to 8 mph.

    High: 72 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50. Northeast wind 3 to 5 mph.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers, mainly after 2pm. Partly sunny, with a high near 65. Chance of precipitation is 30%.

    High: 65 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.

    Low: 46 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely. Mostly cloudy, with a high near 50. Chance of precipitation is 70%.

    High: 50 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.

    Low: 43 °F

    Showers
    Likely

Detailed Forecast

Tonight
Increasing clouds, with a low around 44. South wind 9 to 11 mph, with gusts as high as 20 mph.
Wednesday
A chance of showers, mainly before 9am. Cloudy through mid morning, then gradual clearing, with a high near 67. South wind around 6 mph becoming northwest in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Mostly clear, with a low around 49. Light and variable wind becoming north around 5 mph after midnight.
Thursday
Sunny, with a high near 72. Northwest wind 5 to 8 mph.
Thursday Night
Partly cloudy, with a low around 50. Northeast wind 3 to 5 mph.
Friday
A chance of showers, mainly after 2pm. Partly sunny, with a high near 65. Chance of precipitation is 30%.
Friday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Saturday
Showers likely. Mostly cloudy, with a high near 50. Chance of precipitation is 70%.
Saturday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Sunday
A chance of showers before 2pm. Mostly cloudy, with a high near 58. Chance of precipitation is 30%.
Sunday Night
Mostly cloudy, with a low around 43.
Monday
Mostly sunny, with a high near 65.
Monday Night
A chance of showers. Mostly cloudy, with a low around 47. Chance of precipitation is 30%.
Tuesday
Showers likely. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Gretna PA
 40.26°N 76.47°W (Elev. 699 ft)
Last Update:
7:13 pm EDT Apr 21, 2026
Forecast Valid:
7pm EDT Apr 21, 2026-6pm EDT Apr 28, 2026
 
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