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

Excessive Rainfall and Tropical Storm in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce considerable, potentially life-threatening, flooding across the lower Mississippi River Valley and central Great Lakes region through tonight. Tropical Storm Arthur will move northeastward along the Texas coast today and then move inland over southwestern Louisiana by tonight. An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana. Read More >

Hazardous Weather Conditions

Current conditions at

Wilmington Airport (KILG)

Lat: 39.67°NLon: 75.61°WElev: 72ft.

Mostly Cloudy

78°F

26°C

Humidity 60%
Wind Speed S 14 mph
Barometer 29.77 in (1008.2 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 17 Jun 6:51 pm EDT
Extended Forecast for

Port Penn DE

Coastal Flood Advisory June 18, 12:00am until June 18, 04:00am
Click here for hazard details and duration
Coastal Flood Advisory

  • Tonight

    Tonight: Increasing clouds, with a low around 68. South wind 5 to 10 mph.

    Low: 68 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A chance of showers and thunderstorms after 2pm. Cloudy through mid morning, then gradual clearing, with a high near 92. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 92 °F

    Breezy.
    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 68. West wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 68 °F

    Partly Cloudy

  • Juneteenth

    Juneteenth: Cloudy through mid morning, then gradual clearing, with a high near 84. West wind 5 to 10 mph.

    High: 84 °F

    Gradual
    Clearing

  • Friday Night

    Friday Night: Clear, with a low around 62. Northwest wind around 5 mph.

    Low: 62 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Sunday Night

    Sunday Night: A chance of showers after 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 50%.

    Low: 65 °F

    Partly Cloudy
    then Chance
    Showers

Detailed Forecast

Tonight
Increasing clouds, with a low around 68. South wind 5 to 10 mph.
Thursday
A chance of showers and thunderstorms after 2pm. Cloudy through mid morning, then gradual clearing, with a high near 92. Breezy, with a south wind 15 to 20 mph, with gusts as high as 35 mph. Chance of precipitation is 40%. 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, with gusts as high as 25 mph.
Juneteenth
Cloudy through mid morning, then gradual clearing, with a high near 84. West wind 5 to 10 mph.
Friday Night
Clear, with a low around 62. Northwest wind around 5 mph.
Saturday
Sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 62.
Sunday
Sunny, with a high near 85.
Sunday Night
A chance of showers after 2am. Mostly cloudy, with a low around 65. Chance of precipitation is 50%.
Monday
Showers, mainly after 8am. High near 84. Chance of precipitation is 80%.
Monday Night
Showers. Low around 64. Chance of precipitation is 80%.
Tuesday
Mostly sunny, with a high near 83.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
Sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Port Penn DE
 39.48°N 75.68°W (Elev. 49 ft)
Last Update:
4:08 pm EDT Jun 17, 2026
Forecast Valid:
7pm EDT Jun 17, 2026-6pm EDT Jun 24, 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