A system will move through later today into Tuesday bringing only rain. Later in the week, another system is expected to develop that will bring snow and other wintery precipitation to parts of the Great Lakes region. The winter precipitation is expected to start falling Wednesday night/overnight into Thursday morning. The snow looks to fall until Friday morning/afternoon but it all depends on when the system departs. As we move away from winter, remember to be cautious especially when driving when snow and other winter precipitation is involved. Allow extra time when travelling to as well.

Colorado Low Developing into Mid-Latitude Cyclone

Later in the week, a system is going to develop off of the Rockies that moves across the US. This system will bring the chance for precipitation across the Great Plains, and into the midwest, before reaching the Great Lakes. As this system starts to develop, it eventually forms a robust mid-latitude cyclone with a relatively strong low pressure center. This could result in some heavy precipitation at times. This system will have impacts throughout most of the country, but snow will only be focused in parts of the Great Lakes.

The development of the Mid-Latitude Cyclone begins as the low pressure center forms, Tuesday at 7 PM                    (Wednesday 0Z)

Precipitation Reaches the Great Lakes and Transitions to Snow

We will see this transition more as the rain-snow line  descends south from Canada. This rain-snow line essentially separates where it will snow versus where it will rain. It appears as a yellow line near the Canada/US border.The winter precipitation is expected to start falling Wednesday night/overnight into Thursday morning. The timing of this may make travelling slower, so use caution to and from work. Be prepared for colder temperatures to also have an impact as the cold front of the system moves through.

 

Approximate start time of winter precipitation, Wednesday at 10 PM (Thursday 3Z)

Some regions of the Great Lakes may see some high precipitation accumulations following these two systems. Regions shown in red are areas with large accumulations of precipitation. If you look at the Great Lakes region, you can see the red regions are in the direction of the wind. This indicates that lake effect snow will also be a factor as the winds blow across the Great Lakes. This will increase the accumulation amounts in certain regions, so be cautious with how it will affect your area.

Precipitation Accumulation through Thursday at 7PM (Friday 0Z)

Winter Precipitation falls off as Mid-Latitude Cyclone leaves the region and dissipates by the weekend

As the mid-latitude cyclone moves out of the area, precipitation will fall off. The expected timing of this is sometime in the afternoon to middle of the day on Friday. Depending on the speed that the system moves, it could linger into Friday evening. This system should dissipate over the Atlantic by late morning to early afternoon on Saturday. Overall, this strong system is likely to produce a lot of precipitation as it passes.

Mature Cyclone stage, Thursday at 7 PM (Friday 0Z)

As the system dissipates off of the Atlantic, the precipitation ends for the East Coast, leading to drier conditions following the system.

The cyclone has dissipated off of the East Coast, Saturday 1PM (Saturday 18Z)

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About Alex Burton

Alex graduated with a degree in meteorology from Ohio University. He is pursuing internships and other professional volunteer work for a year before continuing his education. Alex has had a fascination with the weather from a young age and has a particular interest in severe weather. He's completed research on the microscale effects on mountains due to weather. He is very interested in space weather.
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