More April Snow Adds to Winter Fatigue in the Midwest; Erie, PA to Inch Closer to Record

Brian Donegan
Published: April 19, 2018

Yet more April snow will blanket parts of the snow-fatigued Midwest and interior Northeast, followed by a separate system that will bring more snow to the Rockies this weekend.

(MORE: Winter Storm Central)

Let's take a closer look at both of these systems.

Midweek Snowmaker

A compact area of low pressure and its associated upper-level disturbance are interacting with lingering cold air to produce an area of snow in the southern Great Lakes.

Thundersnow and thundersleet were observed in Milwaukee late Wednesday afternoon as heavy snow pushed into southeastern Wisconsin.

Thundersnow was reported in Wayne, Nebraska, thundersleet was reported near Clare, Iowa, and lightning accompanied freezing rain in Paton, Iowa, early Wednesday morning.

Heavy sleet was reported at the National Weather Service office near Des Moines, Iowa, Wednesday morning.

Up to a foot of snow had already piled up in Thompson, Iowa, and just over 6 inches had been measured in Sioux Falls, South Dakota.

If that wasn't interesting enough, quarter-size hail prompted a severe thunderstorm warning early Wednesday morning between Mason City and Waterloo, Iowa.

Accumulated freezing rain and hail led to treacherous roads in Black Hawk County, Iowa, including the cities of Waterloo and Cedar Falls, according to KWWL-TV. 


Current Radar and Conditions

The National Weather Service has posted winter storm warnings and winter weather advisories along the expected path of this snowmaker in parts of the Midwest and interior Northeast.

Winter storm warnings are posted where weather conditions are expected to be the worst. Driving conditions in this region will be dangerous. 


Current Winter Alerts

Thursday into early Friday, as this system pivots through the Great Lakes and parts of the Northeast, light snow or rain may linger in parts of the interior Northeast from western Pennsylvania and New York state into northern New England. 

(MORE: When Spring's Last Snow Typically Happens)


Thursday's Forecast

This system will provide Erie, Pennsylvania with upward to another inch of snow, which will bring the city's snowfall total closer to Buffalo's all-time record snowiest season.

We expect a roughly east-to-west oriented swath of 2-4 inches or more of snow from southern Wisconsin to Upstate New York and northern Pennsylvania.

(FORECAST: (Detroit Milwaukee | Chicago | Erie, Pennsylvania)


Snowfall Forecast

Rockies Snowmaker

An area of low pressure with a deep upper-level trough, or southward dip in the jet stream, will move across the West late this week. This low-pressure system is expected to take a more southerly path into the Southwest.

(MAPS: Weekly Planner)

After blanketing the central Rockies with snow, there is a potential for snow or a rain-and-snow mix along the Front Range of the Rockies Friday night into Saturday.

The ultimate track of the low and air temperatures near the surface will determine whether any snow will target the Colorado Front Range, including Denver.

As of right now, this system does not appear to pose a threat of heavy snow in the Denver metro area, with only mainly light accumulations along the Front Range into Wyoming. 


Friday Night's Forecast

On the warm side of this system, severe thunderstorms are a concern in portions of the southern Plains Friday into the weekend.

(MORE: Severe Thunderstorms Possible in the Southern Plains)

Check back to weather.com for updates on these two snowmakers.


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