How can it be 80 degrees one day and near freezing the next in Philadelphia?

The Northeast has seen wild temperature swings — from record 80s one day to snow showers the next. Scientists say weather patterns like cold fronts and climate factors help explain it.

Philly weather swings: Record high, then rain and wet snow Thursday
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Philadelphia set a new record high temperature of 83 degrees on Wednesday, but FOX 29 Meteorologist Scott Williams said the city is about to see a dramatic weather shift with crashing temperatures and a chance for wet snow.

Weather Authority: scattered storms tonight
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FOX 29 meteorologist Scott Williams looks at the area's severe storm threats for tonight and breaks down the 7-day forecast. 

Tornadoes rip through Chicago-area, NW Indiana, killing 2 and leaving widespread damage

At least four tornadoes from a powerful supercell tore across parts of Illinois and Indiana Tuesday, killing two people in Lake Village, injuring others, damaging homes and infrastructure, and producing destructive hail across the region.

Philadelphia weather: Scattered storms expected on Wednesday

Temperatures soared into the low 80s on Tuesday, but FOX 29 Meteorologist Scott Williams says a dramatic shift in the weather is on the way, including a risk for severe storms and a sharp drop in temperatures.

Philadelphia weather: Scattered storms expected on Wednesday
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Scattered thunderstorms that could turn severe are possible on Wednesday with unseasonably warm temperatures in the upper 70s continuing.

Weather Authority: Gear up for scattered storms
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After beautiful temperatures, precipitation is on the way. FOX 29’s Scott Williams details what to expect in weather this week.

Weather Authority: Soaring temperatures next week
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FOX 29's Kathy Orr breaks down the Philly forecast as the temperatures start to soar next week, including some chances for rain.

Weather Authority: Sunday morning forecast
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Temperatures continue to rise into next week with a high of 78 degrees on Wednesday.

Weather Authority: Foggy start to the weekend in Philadelphia, 70-degree warmth arrives Monday
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It’s a gloomy and foggy start to the weekend across the Philadelphia region, with temperatures stuck in the 40s Saturday morning. Meteorologist Drew Anderson says warmer air is on the way, but it will take a couple more days to get here. Expect clouds, patchy fog and a few passing showers through Saturday night and into Sunday, especially in South Jersey and Delaware. Daylight saving time begins this weekend, bringing a 7 p.m. sunset Sunday. Temperatures climb into the mid-60s Sunday before a sunny and mild Monday with highs near 70 degrees. Drivers should also plan ahead: Route 202 South remains closed near Norristown, and large events in Wildwood could cause delays. Stay with FOX 29 for the latest forecast and traffic updates.