Weather Alerts for California

Recent Locations: Riverside, CA  
Current Alerts for Riverside, CA: Lake Wind Advisory Wind Advisory

1. Coastal Flood Advisory for: Northern Humboldt Coast

2. Beach Hazards Statement for: Orange County Coastal; San Diego County Coastal Areas

3. Wind Advisory for: Santa Barbara County South Coast

4. Wind Advisory for: Santa Barbara County Mountains

5. Wind Advisory for: Los Angeles County San Gabriel Valley

6. Wind Advisory for: Los Angeles County Coast including Downtown Los Angeles

7. Wind Advisory for: Los Angeles County San Fernando Valley; Santa Clarita Valley; Santa Monica Mountains Recreational Area; Ventura County Coastal Valleys; Ventura County Interior Valleys

8. Wind Advisory for: Los Angeles County Mountains excluding the Santa Monica Range; Ventura County Mountains

9. Wind Advisory for: Orange County Inland; Riverside County Mountains; San Bernardino County Mountains; San Bernardino and Riverside County Valleys-The Inland Empire; San Gorgonio Pass Near Banning; Santa Ana Mountains and Foothills

10. Wind Advisory for: San Diego County Inland Valleys; San Diego County Mountains

11. Beach Hazards Statement for: San Luis Obispo County Central Coast; Santa Barbara County Central Coast

12. Beach Hazards Statement for: Catalina and Santa Barbara Islands; Los Angeles County Coast including Downtown Los Angeles; Ventura County Coast

13. Lake Wind Advisory for: San Bernardino County-Upper Colorado River Valley

14. Wind Advisory for: Joshua Tree NP West

15. Wind Advisory for: Chiriaco Summit; Chuckwalla Mountains

16. Wind Advisory for: Palo Verde 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

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Todays National Weather Map

National Weather Forecast for Tomorrow

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Tomorrows National Weather Map

North America Water Vapor (Moisture)

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North American Water Vapor Map

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Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

rain Next Topic: Sleet

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: Sleet

Weather Topic: What is Snow?

Home - Education - Precipitation - Snow

snow Next Topic: Cirrus Clouds

Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake, has unique characteristics, but all of them grow in a hexagonal structure. Snowfall can last for sustained periods of time and result in significant buildup of snow on the ground.

On the earth's surface, snow starts out light and powdery, but as it begins to melt it tends to become more granular, producing small bits of ice which have the consistency of sand. After several cycles of melting and freezing, snow can become very dense and ice-like, commonly known as snow pack.

Next Topic: Cirrus Clouds