2008: "Pneumonia Front" causes big temperature drops in Chicago

2008: "Pneumonia Front" causes big temperature drops in Chicago

Author: AccuWeather May 26, 2022 Duration: 1:59
The term Pneumonia front, first coined by Milwaukee Weather Bureau Office in the 1960s,  is used to describe a rare meteorological phenomenon observed on the western Lake Michigan shoreline during the warm season. These fronts are defined as lake-modified small scale cold fronts that result in one-hour temperature drops of 16 °F or greater.  They do not necessarily have to be large scale, cold fronts to bring weather changes to an entire region. Very often in the spring to early summer the temperature difference between the cold lake waters and the warmer air over land can be as much as 35–40 °F . Under weak prevailing winds, an air current can often develop in the form of a lake breeze that moves from that water to the adjacent shoreline to as much as several miles inland. This "lake-breeze cold front" can drop temperature in places like Chicago, Milwaukee and Green Bay significantly as they cross the area. There has been many a spring day at Wrigley Field that surprises Cub fans who may have travelled from an inland location toward the shore to take in an afternoon game at Wrigley just a few blocks from the lakeshore, only to feel the effects of the "pneumonia front" as that cold blast of air comes through. On May 26, 2008 such a front caused temperatures to drop in Chicago from 72 at 10 pm to 55 an hour later. Winds had gone from light and westerly to northeasterly with gusts up to 40 mph along the lake. Other areas along the lake dropped from the mid 76 to the upper 40s

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Every day has a story written in the wind and rain, and This Date in Weather History uncovers those narratives. With AccuWeather Meteorologist Evan Myers as your guide, this daily podcast connects the present to pivotal moments where weather dramatically altered the course of events. You might hear about a forgotten blizzard that stranded a city, a hurricane that redirected a war, or a simple shift in the breeze that allowed a historic discovery. It’s more than just a list of facts; it’s a look at how the atmosphere has been a relentless and fascinating character in the human drama. Each brief episode offers a specific, grounded tale, revealing how the climate has shaped cultures, economies, and personal lives in ways we often overlook. Tune in for a thoughtful blend of meteorology and historical context, delivered with the authority of AccuWeather. This podcast turns the calendar into a map of atmospheric intrigue, reminding us that the past is always present in the sky above.
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This Date in Weather History
Podcast Episodes
1978: 11" of rain falls on "Sun Day" in New Orleans [not-audio_url] [/not-audio_url]

Duration: 2:20
Most of New Orleans, Louisiana is below the flowing water level of the Mississippi River, that also means that the city is below sea level and so both the Gulf of Mexico and Lake Pontchartrain surfaces are also above the…
2009: Storm collapses roof of Dallas Cowboys' practice facility [not-audio_url] [/not-audio_url]

Duration: 2:24
Twelve people were hospitalized Saturday May 2, 2009 after the roof of the Dallas Cowboys' indoor practice facility in Frisco, Texas collapsed during a thunderstorm. The giant blue Cowboys star atop the building lay crum…
1854: 90 consecutive hours of rain falls in New England [not-audio_url] [/not-audio_url]

Duration: 2:05
The winter of 1853-1854 had been a particularly snowy one across the mountains of Vermont and New Hampshire. Not record breaking, but it was a cold winter and the snows that fell during the winter months didn’t melt much…
1887: Massive Flooding at China's "Yellow River" [not-audio_url] [/not-audio_url]

Duration: 2:43
The Huang He (Wang He) or Yellow River is one of the longest rivers in China, at 3,398 miles, it loops northward from the mountains in western China, then flows east, each year bringing 1.6 billion tons of fine-grained s…
1991: Tropical storm surge floods Bangladesh [not-audio_url] [/not-audio_url]

Duration: 2:15
On April 22, 1991 an area of tropical thunderstorms began to organize in the Bay of Bengal it would grow to become one of the deadliest tropical cyclones ever recorded. The storm hit, one of the most populated areas in B…
1992: "Grapefruit-sized" hail devastates parts of Texas [not-audio_url] [/not-audio_url]

Duration: 2:11
A hailstone begins as a water droplet that is swept upward by an updraft inside of a thundercloud. Inside the cloud, there are a large number of other supercooled water droplets already present. These supercooled particl…
2004: High temperatures smash records across Southern California [not-audio_url] [/not-audio_url]

Duration: 2:05
Santa Ana Winds occur when air from an area of high pressure over the dry, desert region of the southwestern U.S. flows westward in its clockwise circulation toward the California coast. This creates dry winds that flow…
1986: The Chernobyl Nuclear Disaster [not-audio_url] [/not-audio_url]

Duration: 2:42
The Chernobyl, Russia nuclear disaster was the worst nuclear disaster in history and occurred at the Chernobyl Nuclear Reactor Plant. A catastrophic eruption ripped through the power plant on April 26, 1986, spewing radi…
1982: Lightning strike damages Alabama town's water supply [not-audio_url] [/not-audio_url]

Duration: 2:02
Most lightning strikes occur from cloud to cloud – but about 20% go from clouds to the ground. Lightening striking the ground has caused problems with pipes and water supplies.. Some people have also experienced cloudy o…