Weather Alerts for Arizona

Recent Locations: Waynesboro, GA West Poland, ME Phoenix Zoo, AZ

Current Alerts for Phoenix Zoo, AZ: Air Quality Alert Dust Storm Warning

3. Blowing Dust Advisory for: Northwest Pinal County; West Pinal County

4. Blowing Dust Advisory for: South Mountain/Ahwatukee; Southeast Valley/Queen Creek

5. Blowing Dust Advisory for: Tohono O'odham Nation including Sells; 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

6. Dust Storm Warning for: Maricopa, AZ; Pinal, AZ

7. Extreme Heat Warning for: Aguila Valley; Tonopah Desert; Gila Bend; Cave Creek/New River; New River Mesa; Rio Verde/Salt River; Fountain Hills/East Mesa; Superior; Apache Junction/Gold Canyon; Sonoran Desert Natl Monument

8. Extreme Heat Warning for: Grand Canyon Country

9. Extreme Heat Warning for: Northwest Pinal County; West Pinal County

10. Extreme Heat Warning for: Northwest Plateau; Lake Havasu and Fort Mohave; Northwest Deserts; Lake Mead National Recreation Area; Owens Valley; Death Valley National Park; Western Mojave Desert; Eastern Mojave Desert, Including the Mojave National Preserve; Morongo Basin; Cadiz Basin; San Bernardino County-Upper Colorado River Valley; Lincoln County; Northeast Clark County; Western Clark and Southern Nye County; Las Vegas Valley; Lake Mead National Recreation Area; Southern Clark County

11. Extreme Heat Warning for: Northwest Valley; Buckeye/Avondale; Deer Valley; Central Phoenix; North Phoenix/Glendale; Scottsdale/Paradise Valley; East Valley

12. Extreme Heat Warning for: Parker Valley; Kofa; Yuma; Central La Paz; Southeast Yuma County; Gila River Valley; Joshua Tree NP West; Joshua Tree NP East; Imperial County Southwest; Salton Sea; Chuckwalla Mountains; Imperial County Southeast; Imperial County West; Imperial Valley; Chiriaco Summit; Palo Verde Valley; Chuckwalla Valley

13. Extreme Heat Warning for: South Mountain/Ahwatukee; Southeast Valley/Queen Creek

14. Extreme Heat Warning for: Tohono O'odham Nation including Sells; 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

15. Extreme Heat Warning for: Tonto Basin; San Carlos; Globe/Miami

16. Extreme Heat Warning for: Western Pima County Including Ajo/Organ Pipe Cactus National Monument; Upper Santa Cruz River and Altar Valleys including Nogales; Upper San Pedro River Valley including Sierra Vista/Benson; Upper Gila River and Aravaipa Valleys including Clifton/Safford

17. Flash Flood Warning for: Gila, AZ; Yavapai, AZ

18. Special Weather Statement for: Buckeye/Avondale; Central Phoenix; Scottsdale/Paradise Valley; East Valley; Fountain Hills/East Mesa; South Mountain/Ahwatukee; Southeast Valley/Queen Creek; Northwest Pinal County; West Pinal County; Apache Junction/Gold 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

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 are Contrails?

Home - Education - Cloud Types - Contrails

Next Topic: Cumulonimbus Clouds

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: Cumulonimbus Clouds

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle