Weather Alerts for California
1. Air Quality Alert for: Coachella Valley; San Gorgonio Pass Near Banning
2. Air Quality Alert for: Imperial Valley
3. Beach Hazards Statement for: Catalina and Santa Barbara Islands; Malibu Coast; Los Angeles County Beaches
4. Beach Hazards Statement for: San Luis Obispo County Beaches; Santa Barbara County Central Coast Beaches
5. Excessive Heat Warning for: Coachella Valley; San Diego County Deserts
6. Excessive Heat Warning for: Imperial County Southwest; Salton Sea; Imperial County West; Imperial Valley; Chuckwalla Valley
7. Excessive Heat Warning for: San Gorgonio Pass Near Banning
8. Fire Weather Watch for: Lake County Portion of Lake-Napa-Sonoma Unit
9. Heat Advisory for: San Bernardino and Riverside County Valleys-The Inland Empire
10. Heat Advisory for: Santa Barbara County Southeastern Coast; Santa Ynez Mountains Eastern Range
11. Heat Advisory for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range
12. High Surf Advisory for: Ventura County Beaches
13. High Wind Warning for: Interstate 5 Corridor; Western Antelope Valley Foothills
14. High Wind Warning for: Mojave Desert Slopes
15. High Wind Warning for: Northern Ventura County Mountains
16. High Wind Warning for: Santa Barbara County Interior Mountains
17. High Wind Warning for: Santa Barbara County Southeastern Coast; Santa Ynez Mountains Eastern Range
18. High Wind Warning for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range
19. High Wind Watch for: Mojave Desert Slopes
20. Lake Wind Advisory for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
21. Lake Wind Advisory for: Lassen-Eastern Plumas-Eastern Sierra Counties
22. Red Flag Warning for: Northern Sacramento Valley to Southern Tehama County Line Below 1000 Ft; Central Sacramento Valley including Glenn/Colusa/Yuba/Northern Sutter/Butte County Below 1000 Ft; Southern Sacramento Valley In Yolo/Sacramento/Far Western Placer/Southern Sutter and Solano County Below 1000 Ft - Excludes the Delta; Southeast Edge Shasta/Trinity NF and Western Portions of Tehama/Glenn RU; Northern Sierra Foothills from 1000 to 3000 Ft. Includes Nevada-Yuba-Placer RU and Anador-Eldorado RU; Eastern Mendocino NF
23. Wind Advisory for: Interstate 5 Corridor; Western Antelope Valley Foothills
24. Wind Advisory for: Northern Ventura County Mountains
25. Wind Advisory for: Santa Barbara County Interior Mountains
26. Wind Advisory for: Santa Barbara County Southeastern Coast; Santa Ynez Mountains Eastern Range
27. Wind Advisory for: Santa Clarita Valley
Want more detail? Get the Complete 7 Day and Night Detailed Forecast!
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 National Radar Current U.S. National Radar](https://radar.weather.gov/Conus/Loop/NatLoop_Small.gif)
National Weather Forecast--Current
The Current National Weather Forecast and National Weather Map are shown below.
![Today's National Weather Map Today's National Weather Map](https://www.wpc.ncep.noaa.gov/noaa/noaad1.gif)
National Weather Forecast for Tomorrow
Tomorrow National Weather Forecast and Tomorrow National Weather Map are show below.
![Tomorrows National Weather Map Tomorrows National Weather Map](https://www.wpc.ncep.noaa.gov/noaa/noaad2.gif)
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.
![Water Vapor Map North American Water Vapor Map](https://www.ssd.noaa.gov/PS/PCPN/DATA/RT/NA/WV/20.jpg)
Weather Topic: What are Altostratus Clouds?
Home - Education - Cloud Types - 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
Weather Topic: What are Cirrostratus Clouds?
Home - Education - Cloud Types - Cirrostratus Clouds
Next Topic: Cirrus Clouds
Cirrostratus clouds are high, thin clouds that form above
20,000 feet and are made mostly of ice crystals. They sometimes look like giant
feathers, horse tails, or curls of hair in the sky.
These clouds are pushed by the jet stream and can move at high speeds reaching
100 mph.
What do they indicate?
They indicate that a precipitation is likely within 24 hours.
Next Topic: Cirrus Clouds