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

Excessive Rainfall and Potential Tropical Cyclone in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce locally considerable flash flooding over parts of the northwestern Gulf Coast, lower Mississippi River Valley, and Deep South through Thursday. Potential Tropical Cyclone One is forecast to become a tropical storm (Arthur) as it moves along or just off the northwestern Gulf coast through Wednesday. An outbreak of severe weather is forecast in the Midwest Wednesday. Read More >

Current conditions at

Trenton-Mercer Airport (KTTN)

Lat: 40.28°NLon: 74.82°WElev: 210ft.

Fair

56°F

13°C

Humidity 93%
Wind Speed Vrbl 3 mph
Barometer 29.81 in (1008.8 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 17 Jun 5:53 am EDT
Extended Forecast for

Morrisville PA

  • Today

    Today: A chance of showers and thunderstorms, mainly between 3pm and 4pm. Mostly sunny, with a high near 84. Light southeast wind becoming south 5 to 10 mph in the morning. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Partly Sunny
    then Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 67. South wind around 5 mph.

    Low: 67 °F

    Mostly Cloudy

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 91. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 91 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 68. West wind 5 to 15 mph.

    Low: 68 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 84. West wind around 10 mph, with gusts as high as 20 mph.

    High: 84 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Clear, with a low around 63.

    Low: 63 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 61.

    Low: 61 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

Detailed Forecast

Today
A chance of showers and thunderstorms, mainly between 3pm and 4pm. Mostly sunny, with a high near 84. Light southeast wind becoming south 5 to 10 mph in the morning. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Mostly cloudy, with a low around 67. South wind around 5 mph.
Thursday
Showers likely and possibly a thunderstorm before 3pm, then a chance of showers and thunderstorms, mainly after 4pm. Partly sunny, with a high near 91. South wind 10 to 15 mph, with gusts as high as 30 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Partly cloudy, with a low around 68. West wind 5 to 15 mph.
Juneteenth
Mostly sunny, with a high near 84. West wind around 10 mph, with gusts as high as 20 mph.
Friday Night
Clear, with a low around 63.
Saturday
Sunny, with a high near 82.
Saturday Night
Clear, with a low around 61.
Sunday
Sunny, with a high near 84.
Sunday Night
A chance of showers after 2am. Partly cloudy, with a low around 63. Chance of precipitation is 40%.
Monday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 63. Chance of precipitation is 50%.
Tuesday
Mostly sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Morrisville PA
 40.2°N 74.79°W (Elev. 98 ft)
Last Update:
4:07 am EDT Jun 17, 2026
Forecast Valid:
6am EDT Jun 17, 2026-6pm EDT Jun 23, 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