Weather Alerts for California

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1. Excessive Heat Warning for: Chiriaco Summit; Chuckwalla Mountains; Chuckwalla Valley; Imperial County Southeast; Imperial County Southwest; Imperial County West; Imperial Valley; Joshua Tree NP East; Palo Verde Valley; Salton Sea

2. Excessive Heat Warning for: Coachella Valley; San Diego County Deserts

3. Excessive Heat Warning for: Death Valley National Park; San Bernardino County-Upper Colorado River Valley

4. Fire Weather Watch for: Lower Colorado River Valley

5. Heat Advisory for: Bakersfield; Eastern San Joaquin Valley in Kern County; Foggy Bottom; Fresno; Merced and Madera; San Joaquin Confluence; Southern Kings County; Tulare County; West Side Hills; Western San Joaquin Valley; Western San Joaquin Valley in Kern County

6. Heat Advisory for: Carquinez Strait and Delta; Central Sacramento Valley; Motherlode; Mountains Southwestern Shasta County to Western Colusa County; Northeast Foothills, Sacramento Valley; Northern Sacramento Valley; Northern San Joaquin Valley; Southern Sacramento Valley

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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

The Current National Weather Forecast and National Weather Map are shown below.

Today's 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

Weather Topic: What are Wall Clouds?

Home - Education - Cloud Types - Wall Clouds

Wall Clouds Next Topic: Altocumulus Clouds

A wall cloud forms underneath the base of a cumulonimbus cloud, and can be a hotbed for deadly tornadoes.

Wall clouds are formed by air flowing into the cumulonimbus clouds, which can result in the wall cloud descending from the base of the cumulonimbus cloud, or rising fractus clouds which join to the base of the storm cloud as the wall cloud takes shape.

Wall clouds can be very large, and in the Northern Hemisphere they generally form at the southern edge of cumulonimbus clouds.

Next Topic: Altocumulus Clouds

Weather Topic: What are Altostratus Clouds?

Home - Education - Cloud Types - Altostratus Clouds

Altostratus Clouds Next Topic: Cirrocumulus Clouds

Altostratus clouds form at mid to high-level altitudes (between 2 and 7 km) and are created by a warm, stable air mass which causes water vapor to condense as it rise through the atmosphere. Usually altostratus clouds are featureless sheets characterized by a uniform color.

In some cases, wind punching through the cloud formation may give it a waved appearance, called altostratus undulatus. Altostratus clouds are commonly seen with other cloud formations accompanying them.

Next Topic: Cirrocumulus Clouds