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

Showers and Thunderstorms for the Eastern Third of the Country; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

Showers and thunderstorms will continue along and ahead of a cold front for the eastern third of the country. The rainfall for the Great Lakes region could prolong the ongoing flooding. Much cooler weather will filter in behind this cold front along and east of the Rockies. Where the rain is needed, the Southern High Plains, critical fire weather concerns through this weekend. Read More >

Hazardous Weather Conditions

Current conditions at

Lancaster, Lancaster Airport (KLNS)

Lat: 40.12°NLon: 76.29°WElev: 397ft.

Fair

52°F

11°C

Humidity 50%
Wind Speed NW 16 G 24 mph
Barometer 29.98 in (1015.1 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill47°F (8°C)
Last update 19 Apr 5:53 pm EDT
Extended Forecast for

Mount Gretna PA

Freeze Watch April 21, 12:00am until April 21, 09:00am
Click here for hazard details and duration
Freeze Watch

  • Tonight

    Tonight: Increasing clouds, with a low around 38. Northwest wind 6 to 15 mph becoming southwest after midnight. Winds could gust as high as 25 mph.

    Low: 38 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 49. Northwest wind around 14 mph, with gusts as high as 25 mph.

    High: 49 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly clear, with a low around 29. Northwest wind 5 to 10 mph becoming light after midnight.

    Low: 29 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 54. Calm wind becoming southwest 5 to 7 mph in the afternoon.

    High: 54 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers after 2am. Mostly cloudy, with a low around 43. South wind around 9 mph. Chance of precipitation is 30%.

    Low: 43 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, mainly before 2pm. Partly sunny, with a high near 67. Chance of precipitation is 30%.

    High: 67 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

Detailed Forecast

Tonight
Increasing clouds, with a low around 38. Northwest wind 6 to 15 mph becoming southwest after midnight. Winds could gust as high as 25 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 49. Northwest wind around 14 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 29. Northwest wind 5 to 10 mph becoming light after midnight.
Tuesday
Sunny, with a high near 54. Calm wind becoming southwest 5 to 7 mph in the afternoon.
Tuesday Night
A chance of showers after 2am. Mostly cloudy, with a low around 43. South wind around 9 mph. Chance of precipitation is 30%.
Wednesday
A chance of showers, mainly before 2pm. Partly sunny, with a high near 67. Chance of precipitation is 30%.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Sunny, with a high near 72.
Thursday Night
Mostly clear, with a low around 50.
Friday
Mostly sunny, with a high near 74.
Friday Night
A chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 40%.
Saturday
Showers likely. Mostly cloudy, with a high near 64. Chance of precipitation is 60%.
Saturday Night
Showers likely. Mostly cloudy, with a low around 49. Chance of precipitation is 60%.
Sunday
A chance of showers. Mostly cloudy, with a high near 61. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Gretna PA
 40.26°N 76.47°W (Elev. 699 ft)
Last Update:
2:51 pm EDT Apr 19, 2026
Forecast Valid:
6pm EDT Apr 19, 2026-6pm EDT Apr 26, 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