Weather Alert in Arizona
Red Flag Warning issued May 13 at 2:12PM MST until May 13 at 7:00PM MST by NWS Flagstaff AZ
AREAS AFFECTED: Chuska Mountains and Defiance Plateau; Little Colorado River Valley in Apache County; White Mountains
DESCRIPTION: MST Tue May 13 2025/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MST /8 PM MDT/ THIS EVENING FOR THE WHITE MOUNTAINS NORTHWARD TO THE CHUSKA MOUNTAINS AND LITTLE COLORADO RIVER VALLEY... ...RED FLAG WARNING IN EFFECT FROM 9 AM MST /10 AM MDT/ TO 6 PM MST /7 PM MDT/ WEDNESDAY DUE TO STRONG WINDS AND LOW RELATIVE HUMIDITY FOR APACHE COUNTY... The National Weather Service in Flagstaff has issued a Red Flag Warning due to strong winds and low relative humidity, which is in effect from 9 AM MST /10 AM MDT/ to 6 PM MST /7 PM MDT/ Wednesday. * AFFECTED AREA...Locations near Alpine, Buffalo Pass, Eagar- Springerville, Ganado, Pinetop-Lakeside, Saint Johns, Show Low, Whiteriver and Window Rock. This includes portions of the Apache- Sitgreaves National Forest. * WINDS...Southwest 25 to 35 mph with gusts up to 60 mph. * RELATIVE HUMIDITY...As low as 10 percent. * IMPACTS...The combination of gusty winds and low humidity can cause fires to rapidly grow in size and intensity before first responders can contain them.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring or are imminent. A combination of strong winds and low relative humidities can contribute to extreme fire behavior. Please notify field crews of this Red Flag Warning.
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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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