National Weather Service United States Department of Commerce

A stalled frontal boundary and ample monsoonal moisture will lead to flash flood potential from the Great Basin to the Great Plains tonight and Tuesday

A stalled frontal boundary will set up along the southern and central Rockies for the next couple of days providing focus for showers and thunderstorms. In addition, ample monsoonal moisture will stream in across the southwest bringing enough moisture to introduce a flash flood threat from the Great Basin and Southwest eastward across the central and southern Rockies into the adjacent Plains.
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Current Conditions

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Lehigh Valley PA

7 Day Forecast

For More Weather Information:

Philadelphia, PA Local Forecast Office

Tonight

Isolated Showers Chance for Measurable Precipitation 20%

Isolated
Showers

Low: 55 °F

Tuesday

Mostly Sunny

Mostly
Sunny

High: 78 °F

Tuesday
Night

Mostly Clear

Mostly
Clear

Low: 53 °F

Wednesday

Mostly Sunny

Mostly
Sunny

High: 79 °F

Wednesday
Night

Partly Cloudy

Partly
Cloudy

Low: 56 °F

Thursday

Slight Chance Thunderstorms Chance for Measurable Precipitation 20%

Slight Chc
Thunderstorms

High: 82 °F

Thursday
Night

Mostly Cloudy

Mostly
Cloudy

Low: 60 °F

Friday

Chance Showers Chance for Measurable Precipitation 30%

Chance
Showers

High: 81 °F

Friday
Night

Chance Showers Chance for Measurable Precipitation 30%

Chance
Showers

Low: 60 °F

Detailed Forecast

  • Tonight Isolated showers before 10pm. Mostly cloudy, with a low around 55. Northwest wind 7 to 11 mph. Chance of precipitation is 20%.
  • Tuesday Mostly sunny, with a high near 78. Northwest wind around 7 mph.
  • Tuesday Night Mostly clear, with a low around 53. West wind around 5 mph becoming calm in the evening.
  • Wednesday Mostly sunny, with a high near 79. Light west wind increasing to 5 to 10 mph in the morning.
  • Wednesday Night Partly cloudy, with a low around 56. West wind 3 to 6 mph.
  • Thursday A slight chance of showers and thunderstorms after 2pm. Sunny, with a high near 82. Chance of precipitation is 20%.
  • Thursday Night Mostly cloudy, with a low around 60.
  • Friday A chance of showers. Mostly sunny, with a high near 81. Chance of precipitation is 30%.
  • Friday Night A chance of showers. Mostly cloudy, with a low around 60. Chance of precipitation is 30%.
  • Saturday A chance of showers. Partly sunny, with a high near 82. Chance of precipitation is 30%.
  • Saturday Night Mostly cloudy, with a low around 59.
  • Sunday Mostly cloudy, with a high near 84.
  • Sunday Night A chance of showers. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
  • Monday A chance of showers. Mostly cloudy, with a high near 86. Chance of precipitation is 30%.