Weather Alerts for Arizona

Your Recent Locations:  Phoenix, AZ  
Current Alerts for Phoenix, AZ: Air Quality Alert

1. Excessive Heat Warning for: Lake Havasu and Fort Mohave; Lake Mead National Recreation Area; Northwest Deserts; Northwest Plateau

2. Excessive Heat Warning for: South Central Pinal County including Eloy, Picacho Peak State Park; Tohono O'odham Nation including Sells; Tucson Metro Area including Tucson, Green Valley, Marana, Vail; Upper Gila River and Aravaipa Valleys including Clifton, Safford; Western Pima County Including Ajo, Organ Pipe Cactus National Monument

3. Excessive Heat Warning for: Apache Junction, Gold Canyon; Buckeye, Avondale; Cave Creek, New River; Central Phoenix; Deer Valley; East Valley; Fountain Hills, East Mesa; Globe, Miami; New River Mesa; North Phoenix, Glendale; Northwest Pinal County; Northwest Valley; San Carlos; Scottsdale, Paradise Valley; South Mountain, Ahwatukee; Southeast Valley, Queen Creek; Tonto Basin; West Pinal County

4. Excessive Heat Warning for: Gila Bend; Gila River Valley; Yuma

5. Heat Advisory for: Southeast Gila County

6. Air Quality Alert for: Pima

7. Air Quality Alert for: Maricopa

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Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

National Weather Forecast--Current

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Todays National Weather Map

National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

Tomorrows National Weather Map

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.

North American Water Vapor Map

Amazing Weather Videos (updated daily)

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Weather Topic: What are Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

nimbostratus clouds Next Topic: Stratocumulus Clouds

A nimbostratus cloud is similar to a stratus cloud in its formless, smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud, because it is thicker.

Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat of moderate to heavy precipitation. In some cases, the precipitation may evaporate before reaching the ground, a phenomenon known as virga.

Next Topic: Stratocumulus Clouds

Weather Topic: What are Contrails?

Home - Education - Cloud Types - Contrails

contrails Next Topic: Fog

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Fog