Dangerous Heat in the Central and Eastern U.S.; Severe Thunderstorms in the Central U.S. and Northeast; Critical Fire Weather in the Four Corners

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Severe thunderstorms are forecast from parts of the central High Plains into the Upper Midwest, and across parts of the Northeast. Critical fire weather conditions will continue across portions of the Four Corners and Great Basin. Read More >

Hazardous Weather Conditions

Current conditions at

Harrisburg, Capital City Airport (KCXY)

Lat: 40.22°NLon: 76.86°WElev: 335ft.

Fair

84°F

29°C

Humidity	61%
Wind Speed	SW 6 mph
Barometer	30.11 in (1019.5 mb)
Dewpoint	69°F (21°C)
Visibility	10.00 mi
Heat Index	88°F (31°C)
Last update	30 Jun 10:56 am EDT

More Information:

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

Extended Forecast for

Mechanicsburg PA

Heat Advisory July 3, 08:00pm until July 4, 08:00pm

Extreme Heat Warning July 1, 12:00pm until July 3, 08:00pm

Click here for hazard details and duration

Heat Advisory

Extreme Heat Warning

Today
High: 92 °F
Hot
Tonight
Low: 71 °F
Partly Cloudy
Wednesday
High: 98 °F
Mostly Sunny
then Isolated
T-storms
Wednesday Night
Low: 75 °F
Partly Cloudy
Thursday
High: 101 °F
Hot
Thursday Night
Low: 77 °F
Clear
Friday
High: 101 °F
Hot
Friday Night
Low: 75 °F
Chance
T-storms
Independence Day
High: 97 °F
Mostly Sunny
then Chance
T-storms

Detailed Forecast

Today

Mostly sunny and hot, with a high near 92. South wind 6 to 9 mph.

Tonight

Partly cloudy, with a low around 71. South wind 6 to 8 mph.

Wednesday

Isolated showers and thunderstorms after 1pm. Mostly sunny and hot, with a high near 98. Heat index values as high as 107. Calm wind becoming southwest around 6 mph in the afternoon. Chance of precipitation is 20%.

Wednesday Night

Partly cloudy, with a low around 75. Light southwest wind.

Thursday

Sunny and hot, with a high near 101. Calm wind becoming west around 6 mph in the afternoon.

Thursday Night

Clear, with a low around 77.

Friday

Sunny and hot, with a high near 101.

Friday Night

A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 75. Chance of precipitation is 30%.

Independence Day

A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 97. Chance of precipitation is 40%.

Saturday Night

A chance of showers and thunderstorms before 8pm, then a chance of showers between 8pm and 2am. Partly cloudy, with a low around 72. Chance of precipitation is 30%.

Sunday

A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 94. Chance of precipitation is 30%.

Sunday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 40%.

Monday

A chance of showers and thunderstorms. Partly sunny, with a high near 89. Chance of precipitation is 40%.