Weather Alerts for California

Recent Locations: Boyes, MT Canby, MN Sierra City, CA

Current Alerts for Sierra City, CA: Cold Weather Advisory

1. Air Quality Alert for: Imperial County Southwest; Chuckwalla Mountains; Imperial County Southeast; Imperial County West; Imperial Valley

2. Cold Weather Advisory for: East Bay Hills

3. Cold Weather Advisory for: Mariposa-Madera Lower Sierra; Fresno-Tulare Lower Sierra; South End of the Lower Sierra; Yosemite NP outside of the valley; San Joaquin River Canyon; Upper San Joaquin River; Kaiser to Rodgers Ridge; Kings Canyon NP; Grant Grove Area; Sequoia NP; South End of the Upper Sierra

4. Cold Weather Advisory for: North Bay Interior Mountains; North Bay Interior Valleys; East Bay Interior Valleys; Santa Clara Valley Including San Jose; Northern Salinas Valley/Hollister Valley and Carmel Valley

5. Cold Weather Advisory for: Western Plumas County/Lassen Park; West Slope Northern Sierra Nevada

6. Cold Weather Advisory for: Yosemite Valley

7. Extreme Cold Warning for: Eastern Santa Clara Hills; 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

8. Freeze Warning for: 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; Buttonwillow - Lost Hills - I5; Delano-Wasco-Shafter; Hanford - Corcoran - Lemoore; Visalia - Porterville - Reedley; Bakersfield; Southeast San Joaquin Valley; South End San Joaquin Valley

9. High Wind Warning for: Coastal Del Norte

10. High Wind Warning for: Del Norte Interior; Southwestern Humboldt; Northern Humboldt Interior; Southern Humboldt Interior

11. Hydrologic Outlook for: Siskiyou, CA; Coos, OR; Curry, OR; Josephine, OR

12. Wind Advisory for: Central Siskiyou County

13. Wind Advisory for: Mendocino Coast; Northwestern Mendocino Interior; Southwestern Mendocino Interior

14. Wind Advisory for: Northern Humboldt Coast

15. Winter Storm Warning for: Northern Trinity

16. Winter Storm Warning for: Western Siskiyou County; South Central Siskiyou County; North Central and Southeast Siskiyou County

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Current U.S. National Radar--Current

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National Weather Forecast--Current

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National Weather Forecast for Tomorrow

Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.

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 Stratocumulus Clouds?

Home - Education - Cloud Types - Stratocumulus Clouds

Next Topic: Stratus Clouds

Stratocumulus clouds are similar to altocumulus clouds in their fluffy appearance, but have a slightly darker shade due to their additional mass.

A good way to distinguish the two cloud types is to hold your hand out and measure the size of an individual cloud; if it is the size of your thumb it is generally an altocumulus cloud, if it is the size of your hand it is generally a stratocumulus cloud.

It is uncommon for stratocumulus clouds to produce precipitation, but if they do it is usually a light rain or snow.

Next Topic: Stratus Clouds

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