Briefing for Heat, Severe Storm, and Flash Flood Risks through Thursday

Dangerously hot and humid conditions are expected through Wednesday. There is also a threat of isolated severe thunderstorms on Wednesday. Flash flooding from locally heavy rainfall is possible on Thursday. See this briefing for details on these hazards. Read More >

Hazardous Weather Conditions

Heat Advisory in effect from July 29, 11:00 AM EDT until July 30, 08:00 PM EDT

Current conditions at

Allentown, Lehigh Valley International Airport (KABE)

Lat: 40.65°NLon: 75.45°WElev: 384ft.

Fair

73°F

23°C

Humidity	94%
Wind Speed	N 3 mph
Barometer	30.04 in (1016.9 mb)
Dewpoint	71°F (22°C)
Visibility	10.00 mi
Last update	29 Jul 6:51 am EDT

More Information:

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

Extended Forecast for

Hellertown PA

Heat Advisory July 29, 11:00am until July 30, 08:00pm

Click here for hazard details and duration

Heat Advisory

Today
High: 96 °F
Sunny
Tonight
Low: 73 °F
Mostly Clear
Wednesday
High: 95 °F
Sunny then
Slight Chance
T-storms
Wednesday Night
Low: 72 °F
Chance
T-storms then
Chance
Showers
Thursday
High: 82 °F
Chance
Showers then
Heavy Rain
Thursday Night
Low: 65 °F
Heavy Rain
Friday
High: 74 °F
Showers
Likely then
Chance
Showers
Friday Night
Low: 60 °F
Partly Cloudy
Saturday
High: 79 °F
Sunny

Detailed Forecast

Today

Sunny, with a high near 96. Heat index values as high as 104. Calm wind becoming west around 5 mph in the afternoon.

Tonight

Mostly clear, with a low around 73. Calm wind.

Wednesday

A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95. Heat index values as high as 104. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Chance of precipitation is 20%.

Wednesday Night

A chance of showers and thunderstorms, mainly after 8pm. Mostly cloudy, with a low around 72. West wind around 5 mph becoming calm after midnight. Chance of precipitation is 40%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

Thursday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 82. Northeast wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between a half and three quarters of an inch possible.

Thursday Night

Showers and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Low around 65. Chance of precipitation is 80%. New rainfall amounts between 1 and 2 inches possible.

Friday

Showers likely, mainly before 8am. Mostly cloudy, with a high near 74. Chance of precipitation is 60%.

Friday Night

Partly cloudy, with a low around 60.

Saturday

Sunny, with a high near 79.

Saturday Night

Mostly clear, with a low around 57.

Sunday

Sunny, with a high near 82.

Sunday Night

Mostly clear, with a low around 59.