Snow risk as potent low tracks across Great Lakes, Northeast
Wednesday, April 19, 2017, 5:52 - Sunny skies will give way to a low pressure system tracking west to east over northern parts of the country through the work week. Some extra travel time may be necessary as heavy rain progresses eastward from the Ohio Valley into the Northeast. For northernmost areas, a wintry mix will be possible. Here’s a quick look at what you can expect.
Rain and thunderstorms will spread eastward from the Intermountain West and the Rockies into the northern Plains Tuesday evening along a frontal boundary pushing through the region.
By Wednesday and Thursday, heavy to excessive rainfall will continue to develop along the boundary as it drops through the Central Plains and progresses eastward into the Ohio Valley and the Northeast.
Watch below: Storm Track
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Strong to severe thunderstorms are also possible along the boundary on Wednesday and the Storm Prediction Center is highlighting a slight risk area from central Kansas to southern Iowa and far northwest Illinois. Large hail, damaging winds and isolated tornadoes will be possible, say forecasters.
Cold air filtering into the Upper Mississippi valley and Great Lakes region will allow for rain to switch over to mostly snow by Thursday afternoon and beyond. Highest accumulations are expected along the Great Lakes, as well as far northern Maine. The image below, courtesy of The National Weather Service, shows the snowfall forecast through Friday.
Showers and thunderstorms may also be possible across the Southeast and southern Mid-Atlantic states on today near a frontal boundary lingering across the region.
THE NEXT ONE: Rain returns to Northeast, Mid-Atlantic this weekend
A low pressure system is forecast to track across the east-central U.S. this weekend, bringing a swath of heavy rain to parts of the Northeast and Mid-Atlantic.
Current models indicate 1 to 2 inches of rainfall possible across the Northeast (New York, New Jersey, and New England) Friday, according to the Climate Prediction Center.
Below: Precipitation forecast through Saturday (National Weather Service)
On Saturday and Sunday (April 22 and 23), heavy rain (1 to 3 inches, locally more) is expected to shift east from the lower to middle Mississippi Valley to the central and southern Appalachians as the upper-level trough continues its eastward progression. There’s still some model disagreement as of writing this, but a general 0.75 to 1.25 inches, or more, of rainfall seems to be centered on the Mid-Atlantic region from April 23 to 24.
Below: Precipitation forecast through Monday (National Weather Service)
Watch below: U.S. Long Range Forecast