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Category Archives: Severe Weather
How do radars see tornadoes?
A weather radar consists of a transmitter and a receiver. The transmitter emits pulses of radio waves outward in a circular pattern. Precipitation scatters these radio waves.
“Reflectivity” is the amount of transmitted power returned to the radar and measured by its receiver. The intensity of this received signal indicates the intensity of the precipitation.
Measuring the time it takes for the radio wave to leave the radar and return tells us how far away the storm is. The direction the radar is pointing locates the storm. Continue reading
More April snow?
The snow showers that visited our area on Thursday afternoon represented the fourth time snow had been in the air in Madison this month of April.
These showers were associated with the development and passage of a strong and sprawling cyclone that brought blizzard conditions to a number of locations in North Dakota and Montana from Tuesday night into Thursday. The town on Glenburn, North Dakota, received 30.5 inches of snow as of Thursday morning, with 30 to 36 inches variously reported around Minot. Continue reading
What was that stuff that fell on Wednesday and Thursday?
Last Wednesday and Thursday many locations in southern Wisconsin experienced snow squalls in which the falling precipitation was momentarily quite intense.
This event was an example of shallow convection — as opposed to the deep convection of summertime thunderstorms. Continue reading
Category: Meteorology, Seasons, Severe Weather
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Where in the U.S. are the most weather warnings issued?
Certain meteorological conditions may pose threats to life and property. Under these conditions, the National Weather Service (NWS) issues advisories, weather watches and weather warnings.
A weather watch informs us that current atmospheric conditions are favorable for hazardous weather. When the hazardous weather will soon occur in an area, a warning is issued. Weather watches and warnings are issued for a wide variety of hazardous weather, including tornadoes, hurricanes, severe thunderstorms, winter storms, high wind speeds and flooding. Continue reading
Category: Meteorology, Severe Weather
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How did it ever get so cold on Jan. 30, 1951?
On the morning of Jan. 30, 1951, the temperature in Madison fell to its all-time record low of minus 37 degrees.
It is difficult to put that amazing record low in perspective. Consider that the coldest morning of this winter season was less than a week ago, when the temperature Wednesday dropped to minus 18 — a full 19 degrees warmer than the all-time record. Continue reading
Category: History, Seasons, Severe Weather
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