Weekend snow, cold and wind, then more snow Tuesday
A second consecutive weekend snow event occurs in the Midwest. A low-pressure system moves through the Ohio River Valley bringing several inches of snow. Arctic air moving over an unfrozen...
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Ask Tom: When did the wind chill factor and heat index become part of the weather report?
Dear Tom, What year did the wind chill factor and the heat index become part of the weather report? — Phil, Richton Park Dear Phil, The heat index was introduced...
Winter storm imminent, dangerous travel expected
With cold air overhead and low pressure tracking out of the Central Plains and up the Ohio River Valley, then eventually moving off the New England coast, heavy snow will...
Ask Tom: Has the lower 48 ever registered a high temperature less than 70 degrees?
Dear Tom, I noticed the nation's highest temperature was just 72 degrees in Miami on Tuesday, Jan. 15. Has the lower 48 ever registered a high temperature less than 70...
Light snow Thursday, with wintry weather ahead
As a weak easterly-moving low pressure system passes to our south, light snow will continue from the overnight hours into the morning Thursday. Minor accumulations of an inch or so...
Ask Tom: How much has weather forecasting improved since the 1930s?
Dear Tom, How much has weather forecasting improved since the 1930s? — Roy Kentish, Crystal Lake Dear Roy, Tremendous advances in forecasting have occurred and can be directly attributed to...
Seasonal through Friday, then single-digit lows
A weak low-pressure system moving to our south will bring some light snow with minor snow accumulation possible Thursday. A more significant storm is taking shape over the Pacific that...
Ask Tom: Are the metrics heating degree days and cooling degree days still used?
Dear Tom, There used to be a weather-related metric called "heating degree" and "cooling degree" day units. Are they still used? — Larry Lewandowski, Countryside Dear Larry, Both are alive...
Wintry weather to reach our area in days ahead
Several bouts of winter weather are forecast to impact the area over the next week. The first event will occur Tuesday morning as milder air aloft overrides a subfreezing layer...
Week opens mild, but changes may be on the way
Though the Chicago area was only brushed by a major snowstorm over the weekend, the city did receive its heaviest snowfall since late November. Officially, 2.5 inches fell at O'Hare...