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Category Archives: Meteorology
How remarkable was the recent winter storm?
The recent winter storm that affected large portions of the United States just days before the Christmas holiday was remarkable in a number of dimensions.
It was an example of a “bomb cyclone” which simply means that the rate at which its central pressure dropped — about 2.5% in a single day — was extremely unusual. Even though a 2.5% change in central pressure does not sound like very much, it was responsible for revving up the extreme winds that brought wind chills into the minus 30s and ground blizzard conditions to a large portion of the Great Lakes states on Dec. 23. Continue reading
Category: Meteorology, Phenomena, Seasons, Severe Weather
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What is a mesonet?
In meteorology and climatology, a mesoscale network, or mesonet, is a network of automated environmental monitoring stations designed to observe meteorological phenomena on the mesoscale. In meteorology, “mesoscale” refers to weather events that range in size from about 1 mile to about 150 miles.
Mesoscale events last from several minutes to several hours. Thunderstorms, snow squalls and wind gusts are examples of mesoscale events. Due to the space and time scales associated with mesoscale phenomena, weather stations comprising a mesonet are spaced closer together and report more frequently than the larger synoptic scale observing networks run by the National Weather Service. Continue reading
Can a snowstorm have lightning?
Yes, and if you were awake late Wednesday night you might have observed lightning and heard thunder with the snowstorm.
It is not a common occurrence, but when lightning and thunder occur during a snowstorm, the event is reported as “thundersnow.” Continue reading
Was our recent snowfall typical for a Madison winter?
Our first substantial snowfall of the season visited Madison on Friday morning as a period of moderate to heavy snow fell from around 7 to 9:45 a.m.
In the end, we accumulated 4.4 inches of heavy wet snow timed perfectly to snarl the morning commute. Continue reading
Category: Climate, Meteorology, Seasons
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Was our weather this week related to the record event in Buffalo, New York?
It has been a fairly wintry week across the Great Lakes states, including here in southern Wisconsin.
Through Saturday night, it had snowed on five straight days in Madison, a total of 4.4 inches. The same pool of cold air above the ground that led to Madison’s intermittent snow showers stretched all the way across the Great Lakes. In fact, the Saturday morning temperature at 1.5km above the surface at Buffalo, New York, was minus 14 Celsius (about 7 degrees Fahrenheit). Continue reading
Category: Meteorology, Severe Weather
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