Weather Alerts for California
Severe Thunderstorm Warning Special Weather Statement
1. Extreme Heat Warning for: Western Siskiyou County; Central Siskiyou County
2. Flash Flood Warning for: San Diego, CA
3. Flash Flood Warning for: San Diego, CA
4. Flood Advisory for: Fresno, CA
5. Flood Advisory for: Fresno, CA
6. Flood Advisory for: Fresno, CA
7. Flood Advisory for: Kern, CA
8. Flood Advisory for: Madera, CA; Mariposa, CA
9. Flood Advisory for: Riverside, CA
10. Flood Advisory for: Riverside, CA
11. Flood Advisory for: San Diego, CA
12. Flood Advisory for: Sierra, CA
13. Flood Watch for: Lassen-Eastern Plumas-Eastern Sierra Counties; Greater Lake Tahoe Area; Mono; Mineral and Southern Lyon Counties; Greater Lake Tahoe Area; Greater Reno-Carson City-Minden Area
14. Flood Watch for: Yosemite NP outside of the valley; Yosemite 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
15. Red Flag Warning for: Trinity
16. Red Flag Warning for: Western Klamath National Forest; Central Siskiyou County Including Shasta Valley; Shasta-Trinity National Forest in Siskiyou County; Siskiyou County from the Cascade Mountains East and South to Mt Shasta; Modoc County Except for the Surprise Valley; Umpqua National Forest; Western Rogue Basin including the Illinois Valley; Siskiyou Mountains; Eastern Rogue Valley; Southern Oregon Cascades; Klamath Basin and the Fremont-Winema National Forest; South Central Oregon Desert including the BLM Land in Eastern Lake and Western Harney Counties
17. Red Flag Warning for: Western Klamath National Forest; Central Siskiyou County Including Shasta Valley; Shasta-Trinity National Forest in Siskiyou County; Siskiyou County from the Cascade Mountains East and South to Mt Shasta; Modoc County Except for the Surprise Valley; Umpqua National Forest; Western Rogue Basin including the Illinois Valley; Siskiyou Mountains; Eastern Rogue Valley; Southern Oregon Cascades; Klamath Basin and the Fremont-Winema National Forest; South Central Oregon Desert including the BLM Land in Eastern Lake and Western Harney Counties
18. Severe Thunderstorm Warning for: Imperial, CA
19. Severe Thunderstorm Warning for: Imperial, CA
20. Severe Thunderstorm Warning for: Imperial, CA
21. Severe Thunderstorm Warning for: Los Angeles, CA
22. Severe Thunderstorm Warning for: Riverside, CA
23. Severe Thunderstorm Warning for: San Diego, CA
24. Special Weather Statement for: Kaiser to Rodgers Ridge; Kings Canyon NP
25. Special Weather Statement for: Kings Canyon NP; Sequoia NP; South End of the Upper Sierra
26. Special Weather Statement for: Lassen-Eastern Plumas-Eastern Sierra Counties
27. Special Weather Statement for: Lassen-Eastern Plumas-Eastern Sierra Counties
28. Special Weather Statement for: Lassen-Eastern Plumas-Eastern Sierra Counties; Greater Lake Tahoe Area
29. Special Weather Statement for: San Diego County Mountains; San Diego County Deserts
30. Special Weather Statement for: South End of the Upper Sierra
31. Special Weather Statement for: Southern Trinity
32. Special Weather Statement for: Western San Gabriel Mountains and Highway 14 Corridor; Eastern San Gabriel Mountains; Western Antelope Valley Foothills; Eastern Antelope Valley Foothills; Antelope Valley
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Weather Topic: What are Cirrus Clouds?
Home - Education - Cloud Types - Cirrus Clouds
Next Topic: Condensation
Cirrus clouds are high-level clouds that occur above 20,000 feet
and are composed mainly of ice crystals.
They are thin and wispy in appearance.
What do they indicate?
They are often the first sign of an approaching storm.
Next Topic: Condensation
Weather Topic: What are Contrails?
Home - Education - Cloud Types - Contrails
Next Topic: Cumulonimbus Clouds
A contrail is an artificial cloud, created by the passing of an
aircraft.
Contrails form because water vapor in the exhaust of aircraft engines is suspended
in the air under certain temperatures and humidity conditions. These contrails
are called exhaust contrails.
Another type of contrail can form due to a temporary reduction in air pressure
moving over the plane's surface, causing condensation.
These are called aerodynamic contrails.
When you can see your breath on a cold day, it is also because of condensation.
The reason contrails last longer than the condensation from your breath is
because the water in contrails freezes into ice particles.
Next Topic: Cumulonimbus Clouds
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