Bethlehem Live Weather Camera

Nothing will showcase October as a month of transition quite like the next 24 hours, forecasters say, as temperatures take a dive in the Lehigh Valley.

Associated with an unusually strong geomagnetic storm, the northern lights were visible across our area Thursday night, even before the best viewing window advertised by the National Weather Service.

The Lehigh Valley is about to experience “a decidedly early November-like day,” according to the National Weather Service. A frost advisory has been issued from midnight to 9 a.m. Friday.

Hurricane Milton is expected to heavily disrupt air travel, including flights from Lehigh Valley International Airport to numerous destinations in Florida.

Short-term outlooks suggest a cold front will make steady progress across the area Monday, with a reinforcing cold front to follow later this week. It could push overnight temperatures into the 30s for the first time since late April.

What can the Lehigh Valley expect as we head into meteorological fall? Experts have given their long-range outlooks for both temperatures and precipitation, and also weighed in on La Niña.

The commonwealth's six-week leaf-peeping season has begun. Here's when the Lehigh Valley can expect peak colors.

While Tropical Storm Francine and its remnants will not be moving this way, it will play a role in the Lehigh Valley’s weather pattern for the next few days.

Forecasters are increasingly confident that two storms will not become one over the weekend, and that's a benefit to the Lehigh Valley. Instead of a more intense rainfall, we'll have a wet Saturday and a beautiful Sunday on tap.

The Lehigh Valley will go beyond its average 90-degree window this year, with a heat advisory in effect and highs in the mid-90s expected Wednesday. But are the ingredients there for storms to fire?

After temperatures that felt more like October than August last week, forecasters say the Lehigh Valley will return to summer in a big way this week. Near-record heat is expected Wednesday.

“We have cooler air coming in," Lehigh Valley meteorologist Bobby Martrich said in his latest update. "Cooler air and refreshing air coming in for the next several days.” How far will temperatures fall?