Weather Alerts for California
1. Heat Advisory for: Cuyama Valley; Santa Clarita Valley; Southern Salinas Valley; San Luis Obispo County Interior Valleys; San Luis Obispo County Mountains; Central Ventura County Valleys; Western San Fernando Valley; Eastern San Fernando Valley
2. Heat Advisory for: North Bay Interior Mountains; East Bay Interior Valleys; Southern Salinas Valley/Arroyo Seco and Lake San Antonio; Santa Lucia Mountains and Los Padres National Forest; Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park
3. Heat Advisory for: North Bay Interior Mountains; East Bay Interior Valleys; Southern Salinas Valley/Arroyo Seco and Lake San Antonio; Santa Lucia Mountains and Los Padres National Forest; Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park
4. Heat Advisory for: North Bay Interior Valleys; Santa Cruz Mountains; Santa Clara Valley Including San Jose; Eastern Santa Clara Hills; East Bay Hills; Northern Salinas Valley/Hollister Valley and Carmel Valley
5. Heat Advisory for: Northern Humboldt Interior; Southern Humboldt Interior
6. Heat Advisory for: Northern Trinity; Southern Trinity; Northeastern Mendocino Interior; Northern Lake County; Southern Lake County
7. Heat Advisory for: Northwestern Mendocino Interior; Southeastern Mendocino Interior
8. Heat Advisory for: Shasta Lake Area / Northern Shasta County; Northern Sacramento Valley; Central Sacramento Valley; Southern Sacramento Valley; Carquinez Strait and Delta; Northern San Joaquin Valley; Mountains Southwestern Shasta County to Western Colusa County; Northeast Foothills/Sacramento Valley; Motherlode
9. Heat Advisory for: West Side Mountains north of 198; Los Banos - Dos Palos; Merced - Madera - Mendota; Planada - Le Grand - Snelling; Coalinga - Avenal; West Side of Fresno and Kings Counties; Caruthers - San Joaquin - Selma; Fresno-Clovis; West Side Mountains South of 198; Buttonwillow - Lost Hills - I5; Delano-Wasco-Shafter; Hanford - Corcoran - Lemoore; Visalia - Porterville - Reedley; Buena Vista; Bakersfield; Southeast San Joaquin Valley; South End San Joaquin Valley; Mariposa Madera Foothills; Mariposa-Madera Lower Sierra; Fresno-Tulare Foothills; Fresno-Tulare Lower Sierra; South End Sierra Foothills; Yosemite Valley; Kern River Valley
10. Red Flag Warning for: Southern Mono County; Northern Sierra Front - Carson City/Douglas/Storey/Southern Washoe/Eastern Lyon/Far Southern Lassen Counties; Southern Sierra Front - Alpine/Northern Mono/Southern Lyon/Western Mineral Counties; Lahontan Basin - Churchill and Eastern Mineral Counties
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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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