Bethlehem Live Weather Camera

PJM Interconnection, the regional grid operator headquartered in Valley Forge, issued a maximum generation alert and load management alert for Monday.

Allentown hasn't had a 100-degree day since July 2011. The forecast high on Tuesday is now 100 degrees.

With temperatures in the low 90s and heat indices spikes toward 100, showers and thunderstorms are expected in the area by early evening.

Severe storms, dangerous heat and rising humidity are in the forecast for the Lehigh Valley. Here's what to expect this week and into next.

As the summer solstice arrives this week, the long-range outlook depicts a pattern shift that will go from seasonal to sizzler in a hurry, forecasters warn.

The Lehigh Valley has endured nearly non-stop weekend rain since April, marking one of the region’s wettest springs. Despite high rainfall totals, flooding hasn't been a concern.

A stalled front could bring rain, clouds, and cooler temperatures to the Lehigh Valley this weekend, impacting major events like Allentown’s Blues, Brews & Barbeque and Bethlehem’s Juneteenth celebration.

Temperatures climbed well into the upper 80s this week in the Lehigh Valley, teasing that classic summer milestone — the first 90-degree day of the year.

Smoke drifted over the Great Lakes on Monday night and pushed east, the National Weather Service said, with forecasters warning it will result in smokier skies for the Lehigh Valley and large swaths of the eastern U.S. on Tuesday.

The National Weather Service said the haze could be more apparent toward the late afternoon and evening hours, particularly at sunset.

Overall, 31 of the region’s 35 major climate sites were wetter than normal, with 22 of them experiencing one of their 20 wettest May 1-15 periods. Allentown took the top spot, experiencing its wettest May 1-15 ever.

Right on the heels of Friday’s warm front, the Lehigh Valley will see a cold front move in Saturday. Rounds of storms are expected both days, forecasters say.