Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Current conditions at

Lancaster, Lancaster Airport (KLNS)

Lat: 40.12°NLon: 76.29°WElev: 397ft.

Partly Cloudy

54°F

12°C

Humidity 64%
Wind Speed N 12 mph
Barometer 29.90 in (1012.7 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill50°F (10°C)
Last update 21 Mar 10:53 am EDT
Extended Forecast for

Mount Gretna PA

  • Today

    Today: Mostly sunny, with a high near 57. North wind 6 to 10 mph.

    High: 57 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 44. Calm wind becoming southeast 5 to 8 mph in the evening.

    Low: 44 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain between 2pm and 5pm, then a chance of rain and thunderstorms after 5pm.  Partly sunny, with a high near 74. Southwest wind 7 to 11 mph, with gusts as high as 21 mph.  Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Mostly Cloudy
    then Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of rain and thunderstorms before 8pm, then rain likely and possibly a thunderstorm between 8pm and 2am, then rain after 2am.  Low around 42. North wind 9 to 13 mph, with gusts as high as 20 mph.  Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 42 °F

    Rain

  • Monday

    Monday: Rain, mainly before 8am.  High near 48. North wind around 17 mph, with gusts as high as 31 mph.  Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 48 °F

    Rain then
    Slight Chance
    Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 47.

    High: 47 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 35.

    Low: 35 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 53.

    High: 53 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 57. North wind 6 to 10 mph.
Tonight
Mostly cloudy, with a low around 44. Calm wind becoming southeast 5 to 8 mph in the evening.
Sunday
A chance of rain between 2pm and 5pm, then a chance of rain and thunderstorms after 5pm. Partly sunny, with a high near 74. Southwest wind 7 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
A chance of rain and thunderstorms before 8pm, then rain likely and possibly a thunderstorm between 8pm and 2am, then rain after 2am. Low around 42. North wind 9 to 13 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Monday
Rain, mainly before 8am. High near 48. North wind around 17 mph, with gusts as high as 31 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Mostly clear, with a low around 29.
Tuesday
Sunny, with a high near 47.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
Partly sunny, with a high near 53.
Wednesday Night
Mostly cloudy, with a low around 37.
Thursday
Partly sunny, with a high near 56.
Thursday Night
Rain likely. Mostly cloudy, with a low around 41. Chance of precipitation is 60%.
Friday
A chance of rain. Partly sunny, with a high near 51. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
Mount Gretna PA
 40.26°N 76.47°W (Elev. 699 ft)
8:05 am EDT Mar 21, 2026
11am EDT Mar 21, 2026-6pm EDT Mar 27, 2026
 
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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