Weather Alerts for California
1. Air Quality Alert for: Imperial Valley
2. Excessive Heat Warning for: Indian Wells Valley; Mojave Desert
3. Excessive Heat Warning for: Kern River Valley
4. Excessive Heat 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; Buena Vista; Bakersfield; Southeast San Joaquin Valley; South End San Joaquin Valley; Mariposa Madera Foothills; Fresno-Tulare Foothills; South End Sierra Foothills
5. Excessive Heat Warning for: Mojave Desert Slopes
6. Excessive Heat Warning for: Owens Valley
7. Excessive Heat Warning 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
8. Excessive Heat Warning for: West Side Mountains north of 198; West Side Mountains South of 198
9. Excessive Heat Watch for: Apple and Lucerne Valleys
10. Excessive Heat Watch for: Salton Sea; Imperial County West; Imperial Valley; Chuckwalla Valley
11. Excessive Heat Watch for: San Luis Obispo County Interior Valleys; Eastern Antelope Valley Foothills; Antelope Valley
12. Excessive Heat Watch for: Western Antelope Valley Foothills
13. Heat Advisory for: Northern Lake County; Southern Lake County
14. Heat Advisory for: Santa Clara Valley Including San Jose; Eastern Santa Clara Hills; Mountains Of San Benito County And Interior Monterey County Including Pinnacles National Park
15. Heat Advisory for: Sonoma Coastal Range; North Bay Interior Mountains; North Bay Interior Valleys; East Bay Interior Valleys; East Bay Hills
16. Lake Wind Advisory for: Greater Lake Tahoe Area; Greater Lake Tahoe Area
17. Wind Advisory for: Interstate 5 Corridor
18. Wind Advisory for: Mojave Desert Slopes
19. Wind Advisory for: Northern Ventura County Mountains
20. Wind Advisory for: Santa Barbara County Southeastern Coast; Santa Ynez Mountains Eastern Range
21. Wind Advisory for: Santa Barbara County Southwestern Coast; Santa Ynez Mountains Western Range
22. Wind Advisory for: Western Antelope Valley Foothills
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North America Water Vapor (Moisture)
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Weather Topic: What are Hole Punch Clouds?
Home - Education - Cloud Types - Hole Punch Clouds
Next Topic: Mammatus Clouds
A hole punch cloud is an unusual occurrence when a disk-shaped
hole appears in a cirrostratus, cirrocumulus, or altocumulus cloud.
When part of the cloud forms ice crystals, water droplets in the surrounding area
of the cloud evaporate. The effect of this process produces a large elliptical
gap in the cloud. The hole punch cloud formation is rare, but it is not specific
to any geographic area.
Other names which have been used to describe this phenomena include fallstreak hole,
skypunch, and cloud hole.
Next Topic: Mammatus Clouds
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