Severe Thunderstorms in the Midwest and Arizona; Heat Continues in the Southeast and Southwest

Thunderstorms, some severe, may lead to scattered instances of flash flooding across the Midwest and Ohio Valley and southern Arizona. The threat will shift to the Mid-Atlantic coast on Thursday. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that little-to-no relief from the scorching daytime highs will be available. Read More >

Hazardous Weather Conditions

Flood Watch in effect from August 20, 12:00 PM EDT until August 21, 02:00 AM EDT

Current conditions at

Mount Holly, South Jersey Regional Airport (KVAY)

Lat: 39.94°NLon: 74.84°WElev: 49ft.

Fair

67°F

19°C

Humidity	93%
Wind Speed	Calm
Barometer	29.96 in (1014.4 mb)
Dewpoint	65°F (18°C)
Visibility	10.00 mi
Last update	20 Aug 3:54 am EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

2 Miles ENE Williamstown NJ

Flood Watch August 20, 12:00pm until August 21, 02:00am

Click here for hazard details and duration

Flood Watch

Today
High: 84 °F
Slight Chance
T-storms then
T-storms
Tonight
Low: 63 °F
T-storms then
Slight Chance
T-storms and
Patchy Fog
Friday
High: 80 °F
Patchy Fog
then Partly
Sunny
Friday Night
Low: 65 °F
Chance
T-storms then
Heavy Rain
Saturday
High: 80 °F
Heavy Rain
Saturday Night
Low: 66 °F
Chance
T-storms then
Chance
Showers
Sunday
High: 84 °F
Partly Sunny
then Chance
Showers
Sunday Night
Low: 62 °F
Chance
Showers then
Partly Cloudy
Monday
High: 82 °F
Sunny

Detailed Forecast

Today

Showers and thunderstorms, mainly after 2pm. High near 84. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.

Tonight

Showers and thunderstorms before 1am, then a slight chance of showers after 3am. Patchy fog after 2am. Low around 63. North wind around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

Friday

Patchy fog before 8am. Otherwise, partly sunny, with a high near 80. North wind around 5 mph.

Friday Night

A chance of showers before 11pm, then a chance of showers and thunderstorms between 11pm and 2am, then showers likely and possibly a thunderstorm after 2am. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 65. Calm wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Saturday

Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. High near 80. Calm wind becoming east around 5 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

Saturday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 40%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Sunday

A chance of showers after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 40%.

Sunday Night

A chance of showers before 8pm. Partly cloudy, with a low around 62. Chance of precipitation is 30%.

Monday

Sunny, with a high near 82.

Monday Night

Mostly clear, with a low around 60.

Tuesday

Sunny, with a high near 81.

Tuesday Night

Mostly clear, with a low around 62.