Weather Alert in Arizona
Winter Storm Watch issued February 16 at 2:50PM MST until February 18 at 8:00PM MST by NWS Flagstaff AZ
AREAS AFFECTED: Kaibab Plateau; Western Mogollon Rim; Eastern Mogollon Rim
DESCRIPTION: * WHAT...For the Winter Weather Advisory, snow expected. Total snow accumulations 3 to 9 inches. Winds gusting as high as 50 mph. For the Winter Storm Watch, heavy snow possible. Total snow accumulations up to 10 inches possible. Winds could gust as high as 50 mph. * WHERE...Mogollon Rim, and Kaibab Plateau. * WHEN...For the Winter Weather Advisory, from 8 PM this evening to 5 PM MST Tuesday. For the Winter Storm Watch, from late Tuesday night through Wednesday evening. * IMPACTS...Roads, and especially bridges and overpasses, will likely become slick and hazardous. Travel is not recommended as heavy snowfall and low visibility will create dangerous driving conditions. The hazardous conditions will impact the Tuesday morning and evening commutes. Strong winds could cause damage to trees and power lines. * ADDITIONAL DETAILS... Forecast snowfall amounts from 8 PM MST Today to 5 PM MST Tuesday... Forest Lakes: 6 to 8" Fredonia: Trace to 1" Doney Park: 2 to 4" Flagstaff: 4 to 6" Munds Park: 4 to 6" Pine-Strawberry: Trace to 1" Williams: 2 to 4" Heber-Overgaard: Trace to 1" Jacob Lake: 4 to 6"
INSTRUCTION: Monitor the latest forecasts for updates on this situation. Persons should consider delaying all travel. Motorists should use extreme caution if travel is absolutely necessary. Slow down and use caution while traveling. For the latest road conditions and closures go to az511.gov, or call 5 1 1.
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Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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
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