Weather Alert in Wisconsin
Red Flag Warning issued May 12 at 12:14PM CDT until May 12 at 9:00PM CDT by NWS Green Bay WI
AREAS AFFECTED: Vilas; Oneida; Forest; Florence; Northern Marinette County; Lincoln; Langlade
DESCRIPTION: ...CRITICAL FIRE WEATHER CONDITIONS EXPECTED THIS AFTERNOON AND THIS EVENING... .Southerly winds gusting 15 to 20 mph, low relative humidity, and above normal temperatures will lead to critical fire weather conditions on Monday. * AFFECTED AREA...Vilas, Oneida, Forest, Florence, Northern Marinette County, Lincoln and Langlade. * TIMING...Until 9 PM CDT this evening. * WINDS...South 10 to 15 mph with gusts up to 20 mph. * RELATIVE HUMIDITY...15 to 25 percent. * TEMPERATURES...In the mid 80s. * IMPACTS...Fires will start easily and spread quickly in these conditions. So outdoor burning should not be attempted. Visit the Wisconsin DNR website at apps.dnr.wi.gov/wisburn/#/BurnRestrictions and click on the appropriate county to view current burning restrictions.
INSTRUCTION: A Red Flag Warning is issued when critical fire weather conditions are either occurring now, or are imminent. A combination of strong winds, very low relative humidity, warm temperatures and exceptionally dry fuels will create dangerous wildland fire conditions. Persons are urged to be careful with any activities that could potentially lead to a wildland fire. Campfires, outdoor grills, smoking materials, chain saws, and all- terrain vehicles all have the potential to throw a spark and ignite a dangerous and destructive fire. Please advise the appropriate officials or fire crews in the field of this red flag warning.
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Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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