Weather Alerts for California

Recent Locations: Ingalls, KS Lincoln, NE King City, CA

1. Extreme Heat Warning for: Western Siskiyou County; Central Siskiyou County

2. Flash Flood Warning for: San Bernardino, CA

3. Flash Flood Warning for: San Diego, CA

4. Flash Flood Warning for: San Diego, CA

5. Flood Advisory for: Fresno, CA

6. Flood Advisory for: Fresno, CA

7. Flood Advisory for: Fresno, CA

8. Flood Advisory for: Imperial, CA

9. Flood Advisory for: Kern, CA

10. Flood Advisory for: Madera, CA; Mariposa, CA

11. Flood Advisory for: Mariposa, CA; Tuolumne, CA

12. Flood Advisory for: Riverside, CA

13. Flood Advisory for: Riverside, CA

14. Flood Advisory for: San Bernardino, CA

15. Flood Advisory for: San Diego, CA

16. Flood Advisory for: Sierra, CA

17. 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

18. 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

19. Red Flag Warning for: Trinity

20. 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

21. 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

22. Severe Thunderstorm Warning for: Imperial, CA

23. Severe Thunderstorm Warning for: Imperial, CA

24. Severe Thunderstorm Warning for: Los Angeles, CA

25. Severe Thunderstorm Warning for: Riverside, CA

26. Severe Thunderstorm Warning for: San Diego, CA

27. Special Weather Statement for: Cuyama Valley; San Luis Obispo County Mountains; Santa Barbara County Interior Mountains; Southern Ventura County Mountains; Northern Ventura County Mountains

28. Special Weather Statement for: Kaiser to Rodgers Ridge; Kings Canyon NP; Grant Grove Area

29. Special Weather Statement for: Lassen-Eastern Plumas-Eastern Sierra Counties; Greater Lake Tahoe Area

30. Special Weather Statement for: San Bernardino County Mountains; Apple and Lucerne Valleys

31. Special Weather Statement for: San Diego County Mountains; San Diego County Deserts

32. Special Weather Statement for: Southern Trinity

33. 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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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 Fractus Clouds?

Home - Education - Cloud Types - Fractus Clouds

Fractus Clouds Next Topic: Freezing Rain

A fractus cloud (scud) is a fragmented, tattered cloud which has likely been sheared off of another cloud. They are accessory clouds, meaning they develop from parent clouds, and are named in a way which describes the original cloud which contained them.

Fractus clouds which have originated from cumulus clouds are referred to as cumulus fractus, while fractus clouds which have originated from stratus clouds are referred to as stratus fractus. Under certain conditions a fractus cloud might merge with another cloud, or develop into a cumulus cloud, but usually a fractus cloud seen by itself will dissipate rapidly.

They are often observed on the leading and trailing edges of storm clouds, and are a display of wind activity.

Next Topic: Freezing Rain

Weather Topic: What is Graupel?

Home - Education - Precipitation - Graupel

Graupel Next Topic: Hail

Graupel is a form of precipitation that is created by atmospheric conditions which cause supercooled water droplets to contact snow crystals and freeze to their surface.

Sometimes known as soft hail or snow pellets, graupel is delicate and easily destroyed by touch. Whereas hail usually falls during severe weather, graupel doesn't require such conditions to form, and can form in mild precipitation similar to situations which produce snowfall.

Next Topic: Hail