Snow will make an appearance across more of the Great Lakes and Appalachians before the week comes to an end.
The lake-effect machine will be in full effect across the entire Great Lakes from Wednesday through at least Friday.
Prior to that, snow showers will be confined to the upper Great Lakes through Monday before a band of rain and wet snow reaches Chicago late Tuesday.
A far-reaching blast of cold air moving over the relatively warm waters of the Great Lakes later this week will have no trouble activating the lake-effect machine.
The result will be numerous rain and snow showers streaming over the typical lake-effect snowbelts and into the central Appalachians.
Communities along the shores of the Great Lakes lie too close to the warm water for snow to fall.
However, it will turn cold enough at times for snow to accumulate at least a few inches over the higher elevations of the central Appalachians, parts of Michigan and northwestern Indiana.
"Slow travel is possible over the highest elevations, especially along secondary roads with temperatures dipping into the 30s at times by day and the 20s at night," stated AccuWeather.com Expert Senior Meteorologist Alex Sosnowski.
"It is possible that lawns and elevated surfaces in some valley and lower elevation spots get a light coating of snow," Sosnowski continued.
Snow showers could even work their way to the Catskills in southeastern New York and the Poconos in northeastern Pennsylvania and even develop over the mountains of northern Vermont, northern New Hampshire and northwestern Maine late in the week.
No snow will reach the I-95 corridor of New England and the mid-Atlantic, but brisk winds and Novemberlike cold air will.
Potent thunderstorms will target part of the Plains during a time when many will be outdoors celebrating Memorial Day into the evening hours.
Despite no longer being a tropical storm or depression, Bonnie will induce daily showers and thunderstorms across the Carolinas into the middle of the week.
After a mild and dry Memorial Day, warmth will build across the northwestern United States.
Extremely heavy rain fell over the weekend in southwestern Germany, leading to dangerous and deadly flash flooding.
New Yorkers will crowd city streets on Monday night in hopes of catching a view of Manhattanhenge, the stunning sunset that occurs four times a year.
Northern France will remain at risk for occasional rain through the first half of the week, threatening to cause additional delays at the French Open.
Mississippi/ Ohio Valleys (1989)
Thunderstorms produced severe weather from the Upper Mississippi Valley to the Upper Ohio Valley. A F-4 tornado injured three people and caused a million dollars damage at New Providence IA.
Thunderstorms developing along a warm front spawned fourteen tornadoes in northeastern Texas during the last afternoon and night. Thunderstorms produced baseball size hail near Marshall, wind gusts to 77 mph at Commerce and up to five inches of rain in many locations.
Daytona Beach, FL (1997)
140 people rescued from rip currents. A man died trying to save his wife.