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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North America Water Vapor (Moisture)
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Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
Next Topic: Precipitation
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: Precipitation
Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
Next Topic: Shelf Clouds
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