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.

Overcast

56°F

13°C

Humidity 90%
Wind Speed SE 8 mph
Barometer 29.86 in (1010.9 mb)
Dewpoint 53°F (12°C)
Visibility 10.00 mi
Last update 18 Apr 10:53 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: Showers likely, mainly after 5am. Cloudy, with a low around 48. Southeast wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 48 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers, mainly before 11am. High near 53. Northwest wind 14 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 53 °F

    Showers then
    Slight Chance
    Showers

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 38. West wind 6 to 10 mph.

    Low: 38 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 48. Northwest wind 11 to 15 mph, with gusts as high as 25 mph.

    High: 48 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 29. North wind 5 to 10 mph.

    Low: 29 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 42.

    Low: 42 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 66.

    High: 66 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

Detailed Forecast

Tonight
Showers likely, mainly after 5am. Cloudy, with a low around 48. Southeast wind 7 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday
Showers, mainly before 11am. High near 53. Northwest wind 14 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Partly cloudy, with a low around 38. West wind 6 to 10 mph.
Monday
Mostly sunny, with a high near 48. Northwest wind 11 to 15 mph, with gusts as high as 25 mph.
Monday Night
Mostly clear, with a low around 29. North wind 5 to 10 mph.
Tuesday
Sunny, with a high near 54.
Tuesday Night
Partly cloudy, with a low around 42.
Wednesday
Mostly cloudy, with a high near 66.
Wednesday Night
Mostly clear, with a low around 43.
Thursday
Sunny, with a high near 71.
Thursday Night
Mostly clear, with a low around 50.
Friday
Mostly sunny, with a high near 75.
Friday Night
Partly cloudy, with a low around 53.
Saturday
A chance of showers. Partly sunny, with a high near 68. Chance of precipitation is 40%.
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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:
8:06 pm EDT Apr 18, 2026
Forecast Valid:
11pm EDT Apr 18, 2026-6pm EDT Apr 25, 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