Dangerous Heat and Humidity Building from the Plains to the East Coast

A strengthening ridge of high pressure will produce much above average temperatures from the Plains to the East Coast, a true summer heat wave. Highs in the 90s and triple digits combined w/ humidity and dewpoints surging into the upper 70s, if not low 80s, will create heat indices as high as 110 to 115 through this weekend. Air quality will likely be poor due to haze and little air circulation. Read More >

Current conditions at

Lancaster, Lancaster Airport (KLNS)

Lat: 40.12°NLon: 76.29°WElev: 397ft.

Overcast

75°F

24°C

Humidity 96%
Wind Speed SE 3 mph
Barometer 29.88 in (1011.4 mb)
Dewpoint 74°F (23°C)
Visibility 7.00 mi
Last update 18 Jul 4:53 am EDT
Extended Forecast for

Washington Boro PA

Excessive Heat Watch July 19, 12:00pm until July 21, 10:00pm
Click here for hazard details and duration
Excessive Heat Watch
  • Overnight

    Overnight: A chance of showers.  Patchy fog.  Otherwise, mostly cloudy, with a low around 72. Calm wind.  Chance of precipitation is 30%.

    Chance
    Showers and
    Patchy Fog

    Low: 72 °F

  • Thursday

    Thursday: Showers and thunderstorms.  Patchy fog before 8am. High near 88. Light west wind.  Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    T-storms and
    Patchy Fog

    High: 88 °F

  • Thursday
    Night

    Thursday Night: Showers and thunderstorms likely before 8pm, then a slight chance of showers between 8pm and 2am.  Partly cloudy, with a low around 71. Calm wind.  Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    T-storms
    Likely then
    Slight Chance
    Showers

    Low: 71 °F

  • Friday

    Friday: Mostly sunny and hot, with a high near 96. Heat index values as high as 105. Calm wind becoming west around 6 mph in the afternoon.

    Hot

    High: 96 °F

  • Friday
    Night

    Friday Night: Partly cloudy, with a low around 78. West wind 3 to 6 mph.

    Partly Cloudy

    Low: 78 °F

  • Saturday

    Saturday: Sunny and hot, with a high near 99.

    Hot

    High: 99 °F

  • Saturday
    Night

    Saturday Night: Partly cloudy, with a low around 79.

    Partly Cloudy

    Low: 79 °F

  • Sunday

    Sunday: A chance of showers and thunderstorms.  Mostly sunny and hot, with a high near 94. Chance of precipitation is 40%.

    Chance
    T-storms

    High: 94 °F

  • Sunday
    Night

    Sunday Night: A chance of showers and thunderstorms.  Mostly cloudy, with a low around 76. Chance of precipitation is 40%.

    Chance
    T-storms

    Low: 76 °F

Detailed Forecast

Overnight
A chance of showers. Patchy fog. Otherwise, mostly cloudy, with a low around 72. Calm wind. Chance of precipitation is 30%.
Thursday
Showers and thunderstorms. Patchy fog before 8am. High near 88. Light west wind. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and thunderstorms likely before 8pm, then a slight chance of showers between 8pm and 2am. Partly cloudy, with a low around 71. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Mostly sunny and hot, with a high near 96. Heat index values as high as 105. Calm wind becoming west around 6 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 78. West wind 3 to 6 mph.
Saturday
Sunny and hot, with a high near 99.
Saturday Night
Partly cloudy, with a low around 79.
Sunday
A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 94. Chance of precipitation is 40%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 76. Chance of precipitation is 40%.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 88. Chance of precipitation is 50%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 85.
Tuesday Night
Partly cloudy, with a low around 65.
Wednesday
Sunny, with a high near 83.
Click Map For Forecast
Point Forecast:
Washington Boro PA
 39.98°N 76.43°W (Elev. 400 ft)
4:19 am EDT Jul 18, 2019
5am EDT Jul 18, 2019-6pm EDT Jul 24, 2019
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database