Weather Alert in California

Recent Locations: San Francisco, CA  
Current Alerts for San Francisco, CA: Special Weather Statement

Winter Weather Advisory issued March 30 at 12:38PM PDT until April 1 at 5:00PM PDT by NWS Medford OR

AREAS AFFECTED: Modoc County; Klamath Basin; Northern and Eastern Klamath County and Western Lake County; Central and Eastern Lake County

DESCRIPTION: * WHAT...Snow expected. Total snow accumulations between 3 and 6 inches, with up to 13 inches over higher terrain. Winds gusting between 30 and 45 mph. * WHERE...Portions of Klamath, Lake, and Modoc counties, including Lakeview, Chemult, Chiloquin, Valley Falls, Modoc Point, Davis Creek, the highway 97 corridor between Klamath Falls and Crescent, highway 140 east of Bly, highway 395 between Alturas and Alkali Lake, and highway 139 between Adin and Canby. * WHEN...From 11 PM this evening to 5 PM PDT Tuesday. * IMPACTS...Travel could become difficult due to snow and low visibility. The hazardous conditions could impact the Monday morning and evening commutes.

INSTRUCTION: Slow down and use caution while traveling. In California, call 511 or visit quickmap.dot.ca.gov for road information. In Oregon, call 511 or visit tripcheck.com for road information. Be prepared for slippery roads. Slow down and use caution while driving. If you are going outside, watch your first few steps taken on stairs, sidewalks, and driveways. These surfaces could be icy and slippery, increasing your risk of a fall and injury.

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Current U.S. National Radar--Current

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North America Water Vapor (Moisture)

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Weather Topic: What is Hail?

Home - Education - Precipitation - Hail

Hail Next Topic: Hole Punch Clouds

Hail is a form of precipitation which is recognized by large solid balls or clumps of ice. Hail is created by thunderstorm clouds with strong updrafts of wind. As the hailstones remain in the updraft, ice is deposited onto them until their weight becomes heavy enough for them to fall to the earth's surface.

Hail storms can cause significant damage to crops, aircrafts, and man-made structures, despite the fact that the duration is usually less than ten minutes.

Next Topic: Hole Punch Clouds

Weather Topic: What are Mammatus Clouds?

Home - Education - Cloud Types - Mammatus Clouds

Mammatus Clouds Next Topic: Nimbostratus Clouds

A mammatus cloud is a cloud with a unique feature which resembles a web of pouches hanging along the base of the cloud.

In the United States, mammatus clouds tend to form in the warmer months, commonly in the Midwest and eastern regions.

While they usually form at the bottom of a cumulonimbis cloud, they can also form under altostratus, altocumulus, stratocumulus, and cirrus clouds. Mammatus clouds warn that severe weather is close.

Next Topic: Nimbostratus Clouds

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