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

Severe Thunderstorms and Flash Flooding Risks - Saturday, July 18th

Scattered to numerous severe thunderstorms are likely across the region on Saturday, July 18th, including a risk of flash flooding for portions of the area. View this briefing for the details regarding these hazards. Read More >

Hazardous Weather Conditions

Current conditions at

Morristown Airport (KMMU)

Lat: 40.8°NLon: 74.42°WElev: 187ft.

Fair

63°F

17°C

Humidity 100%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 18 Jul 1:35 am EDT
Extended Forecast for

Rockaway NJSimilar City Names

Flood Watch July 18, 10:00am until July 19, 02:00am
Click here for hazard details and duration
Flood Watch

  • Overnight

    Overnight: Areas of smoke. Partly cloudy, with a low around 67. Calm wind.

    Low: 67 °F

    Areas Smoke

  • Saturday

    Saturday: A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 9am. Some of the storms could be severe. Widespread smoke, mainly before 2pm. High near 79. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 79 °F

    Severe
    Thunderstorms

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely before 2am, then a slight chance of showers between 2am and 3am. Some of the storms could be severe. Mostly cloudy, with a low around 68. Southwest wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 68 °F

    Severe
    Thunderstorms
    then Chance
    Showers

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 80. Northwest wind 10 to 15 mph.

    High: 80 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 58. Calm wind.

    Low: 58 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 63.

    Low: 63 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Showers likely and possibly a thunderstorm, mainly after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.

    High: 83 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers and possibly a thunderstorm before 2am, then showers likely. Low around 67. Chance of precipitation is 80%.

    Low: 67 °F

    Showers

Detailed Forecast

Overnight
Areas of smoke. Partly cloudy, with a low around 67. Calm wind.
Saturday
A chance of showers and thunderstorms, then showers and possibly a thunderstorm after 9am. Some of the storms could be severe. Widespread smoke, mainly before 2pm. High near 79. South wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday Night
Showers and thunderstorms likely before 2am, then a slight chance of showers between 2am and 3am. Some of the storms could be severe. Mostly cloudy, with a low around 68. Southwest wind around 10 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 80. Northwest wind 10 to 15 mph.
Sunday Night
Mostly clear, with a low around 58. Calm wind.
Monday
Sunny, with a high near 80.
Monday Night
Partly cloudy, with a low around 63.
Tuesday
Showers likely and possibly a thunderstorm, mainly after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.
Tuesday Night
Showers and possibly a thunderstorm before 2am, then showers likely. Low around 67. Chance of precipitation is 80%.
Wednesday
Showers likely, with thunderstorms also possible after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 60%.
Wednesday Night
A chance of thunderstorms. Partly cloudy, with a low around 62. Chance of precipitation is 30%.
Thursday
Sunny, with a high near 80.
Thursday Night
Mostly clear, with a low around 61.
Friday
Sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Rockaway NJSimilar City Names
 40.9°N 74.5°W (Elev. 518 ft)
Last Update:
1:32 am EDT Jul 18, 2026
Forecast Valid:
1am EDT Jul 18, 2026-6pm EDT Jul 24, 2026
 
Forecast Discussion
 
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Additional Resources

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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