Weather Alerts for Arizona
1. Extreme Heat Warning for: Aguila Valley; Tonopah Desert; Gila Bend; Cave Creek/New River; Fountain Hills/East Mesa; Northwest Pinal County; West Pinal County; Apache Junction/Gold Canyon; Sonoran Desert Natl Monument
2. Extreme Heat Warning for: Grand Canyon Country
3. Extreme Heat Warning for: Lake Havasu and Fort Mohave; Northwest Deserts; Death Valley National Park; Western Mojave Desert; Morongo Basin; Cadiz Basin; San Bernardino County-Upper Colorado River Valley; Western Clark and Southern Nye County
4. Extreme Heat Warning for: Lake Mead National Recreation Area; Eastern Mojave Desert, Including the Mojave National Preserve; Northeast Clark County; Las Vegas Valley; Lake Mead National Recreation Area; Southern Clark County
5. Extreme Heat Warning for: Northwest Valley; Buckeye/Avondale; Deer Valley; Central Phoenix; North Phoenix/Glendale; Scottsdale/Paradise Valley; East Valley; South Mountain/Ahwatukee; Southeast Valley/Queen Creek
6. Extreme Heat Warning for: Parker Valley; Yuma; Imperial County Southwest; Salton Sea; Imperial County West; Imperial Valley; Palo Verde Valley; Chuckwalla Valley
7. Heat Advisory for: Northwest Plateau; Owens Valley; Esmeralda and Central Nye County; Lincoln County; Sheep Range; Spring Mountains-Red Rock Canyon
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Current U.S. National Radar--Current
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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 Cumulonimbus Clouds?
Home - Education - Cloud Types - Cumulonimbus Clouds
Next Topic: Cumulus Clouds
The final form taken by a growing cumulus cloud is the
cumulonimbus cloud, which is very tall and dense.
The tower of a cumulonimbus cloud can soar 23 km into the atmosphere, although
most commonly they stop growing at an altitude of 6 km.
Even small cumulonimbus clouds appear very large in comparison to other cloud types.
They can signal the approach of stormy weather, such as thunderstorms or blizzards.
Next Topic: Cumulus Clouds
Weather Topic: What is Drizzle?
Home - Education - Precipitation - Drizzle
Next Topic: Evaporation
Drizzle is precipitation in the form of water droplets which are
smaller than raindrops.
Drizzle is characterized by fine, gently falling droplets and typically does not
impact human habitation in a negative way. The exception to this is freezing drizzle,
a condition where drizzle freezes immediately upon reaching earth's surface.
Freezing drizzle is still less dangerous than freezing rain, but can
potentially result in hazardous road conditions.
Next Topic: Evaporation
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