Weather Alerts for Arizona
1. Excessive Heat Warning for: Aguila Valley; Northwest Valley; Tonopah Desert; Gila Bend; Buckeye/Avondale; Cave Creek/New River; Deer Valley; Central Phoenix; North Phoenix/Glendale; New River Mesa; Scottsdale/Paradise Valley; Rio Verde/Salt River; East Valley; Fountain Hills/East Mesa; South Mountain/Ahwatukee; Southeast Valley/Queen Creek; Superior; Northwest Pinal County; West Pinal County; Apache Junction/Gold Canyon; Sonoran Desert Natl Monument
2. Excessive Heat Warning for: San Carlos; Globe/Miami
3. Excessive Heat Warning for: Tucson Metro Area including Tucson/Green Valley/Marana/Vail; South Central Pinal County including Eloy/Picacho Peak State Park; Southeast Pinal County including Kearny/Mammoth/Oracle; Upper Gila River and Aravaipa Valleys including Clifton/Safford
4. Red Flag Warning for: Chinle Valley; Chuska Mountains and Defiance Plateau; Little Colorado River Valley in Navajo County; Little Colorado River Valley in Apache County; Eastern Mogollon Rim; Black Mesa Area
5. Red Flag Warning for: Grand Canyon Country; Coconino Plateau; Northeast Plateaus and Mesas Hwy 264 Northward; Little Colorado River Valley in Coconino County; Western Mogollon Rim; Northeast Plateaus and Mesas South of Hwy 264
6. Red Flag Warning for: Grand Canyon Country; Coconino Plateau; Northeast Plateaus and Mesas Hwy 264 Northward; Little Colorado River Valley in Coconino County; Western Mogollon Rim; Northeast Plateaus and Mesas South of Hwy 264
7. Red Flag Warning for: Kaibab Plateau; Marble and Glen Canyons
8. Red Flag Warning for: Kaibab Plateau; Marble and Glen Canyons
9. Red Flag Warning for: Lake Mead NRA/Colorado River-AZ side; Northwest Deserts/Northwest Plateau
10. Red Flag Warning for: Lake Mead NRA/Colorado River-AZ side; Northwest Deserts/Northwest Plateau
11. Red Flag Warning for: Yavapai County Mountains
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Current U.S. National Radar--Current
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National Weather Forecast--Current
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National Weather Forecast for Tomorrow
Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.
North America Water Vapor (Moisture)
This map shows recent moisture content over North America. Bright and colored areas show high moisture (ie, clouds); brown indicates very little moisture present; black indicates no moisture.
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