Weather Alert in Arizona
Wind Advisory issued April 27 at 3:11AM MST until April 27 at 7:00PM MST by NWS Flagstaff AZ
AREAS AFFECTED: Little Colorado River Valley in Navajo County; Little Colorado River Valley in Apache County; White Mountains
DESCRIPTION: * WHAT...Southwest winds 20 to 30 mph with gusts 40 to 50 mph. The strong winds will develop early this morning from Show Low to Springerville and then spread northward to St Johns, Winslow, and Holbrook after 9 AM MST. * WHERE...Little Colorado River Valley in Apache County, Little Colorado River Valley in Navajo County, and White Mountains. * WHEN...Until 7 PM MST /8 PM MDT/ this evening. * IMPACTS...Travel will be difficult, especially for high profile vehicles.
INSTRUCTION: Secure loose outdoor objects that could be blown around or damaged by the wind. Winds this strong can make driving difficult, especially for high profile vehicles, such as RVs, campers, and tractor trailers. Use extra caution.
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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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