Weather Alert in Michigan
Special Weather Statement issued February 15 at 8:12PM EST by NWS Gaylord MI
AREAS AFFECTED: Emmet; Cheboygan; Presque Isle; Leelanau; Antrim; Otsego; Montmorency; Alpena; Benzie; Grand Traverse; Kalkaska; Crawford; Oscoda; Alcona; Manistee; Wexford; Missaukee; Roscommon; Ogemaw; Iosco; Western Chippewa; Central Chippewa; Southeast Chippewa; Western Mackinac; Eastern Mackinac; Mackinac Island/Bois Blanc Island; Beaver Island and surrounding islands; Charlevoix
DESCRIPTION: Dense fog has been gradually making inroads from Lake Michigan into coastal areas of northern Michigan this evening, along with additional areas of dense fog across the eastern UP and northeast lower. Visibilities of a quarter mile or less have been observed in localized areas. Locally dense fog will continue into this evening at times across portions of eastern upper and northern lower Michigan. Untreated roadways may be slick in spots due to freezing fog. If you encounter dense fog while traveling, use low beam headlights and increase following distance.
INSTRUCTION: N/A
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Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
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