Weather Alerts for Arizona

Recent Locations: Glendale, AZ Scottsdale, AZ

1. Blowing Dust Advisory for: Eastern Cochise County Below 5000 Feet including Douglas/Willcox

2. High Wind Warning for: Little Colorado River Valley in Coconino County; Little Colorado River Valley in Navajo County; Little Colorado River Valley in Apache County

3. Red Flag Warning for: Chuska Mountains and Defiance Plateau; Little Colorado River Valley in Apache County; White Mountains

4. Red Flag Warning for: Chuska Mountains and Defiance Plateau; Little Colorado River Valley in Apache County; White Mountains

5. Red Flag Warning for: Eastern Pima-Southeastern Pinal-Santa Cruz-Western Cochise; Southern Graham-Central and Eastern Cochise-Southern Greenlee-Lower Elevations of the San Carlos Apache Nation in Graham County; Mountains above 5500 feet

6. Red Flag Warning for: Eastern Pima-Southeastern Pinal-Santa Cruz-Western Cochise; Southern Graham-Central and Eastern Cochise-Southern Greenlee-Lower Elevations of the San Carlos Apache Nation in Graham County; Mountains above 5500 feet

7. Red Flag Warning for: Little Colorado River Valley in Coconino County; Little Colorado River Valley in Navajo County

8. Red Flag Warning for: Pima-South Central Pinal-Tohono Oodham Nation; Northern Graham-Northern Greenlee-White and Gila Mountains

9. Red Flag Warning for: Southern Gila County/Tonto National Forest Foothills

10. Wind Advisory for: Eastern Cochise County Below 5000 Feet including Douglas/Willcox

11. Wind Advisory for: Kaibab Plateau; Marble and Glen Canyons; Grand Canyon Country; Coconino Plateau; Yavapai County Mountains; Northeast Plateaus and Mesas Hwy 264 Northward; Chinle Valley; Chuska Mountains and Defiance Plateau; Western Mogollon Rim; Eastern Mogollon Rim; White Mountains; Yavapai County Valleys and Basins; Oak Creek and Sycamore Canyons; Black Mesa Area; Northeast Plateaus and Mesas South of Hwy 264

12. Wind Advisory for: Upper San Pedro River Valley including Sierra Vista/Benson; Chiricahua Mountains including Chiricahua National Monument; Dragoon/Mule/Huachuca and Santa Rita Mountains including Bisbee/Canelo Hills/Madera Canyon

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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

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North America Water Vapor (Moisture)

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Weather Topic: What are Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

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