Weather Alert in California

Red Flag Warning issued May 18 at 11:49AM PDT until May 19 at 8:00PM PDT by NWS Sacramento CA

AREAS AFFECTED: 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; Eastern Delta; Northern San Joaquin Valley in San Joaquin and Stanislaus Counties Below 1000 ft - Excludes the Delta

DESCRIPTION: * Winds...North winds 15 to 25 mph with gusts up to 35 mph expected. Strongest winds are expected across the central Sacramento Valley, along and west of Interstate 5. * Humidity...15 to 25 percent. * Highest Threat...Central and Southern Sacramento Valley along and west of the I-5 corridor and the Northern San Joaquin Valley. * Impacts...The combination of gusty winds and low humidity can cause fire to rapidly grow in size and intensity. Outdoor burning is not recommended.

INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.

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Weather Topic: What is Snow?

Home - Education - Precipitation - Snow

Snow Next Topic: Stratocumulus Clouds

Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake, has unique characteristics, but all of them grow in a hexagonal structure. Snowfall can last for sustained periods of time and result in significant buildup of snow on the ground.

On the earth's surface, snow starts out light and powdery, but as it begins to melt it tends to become more granular, producing small bits of ice which have the consistency of sand. After several cycles of melting and freezing, snow can become very dense and ice-like, commonly known as snow pack.

Next Topic: Stratocumulus Clouds

Weather Topic: What are Stratus Clouds?

Home - Education - Cloud Types - Stratus Clouds

Stratus Clouds Next Topic: Wall Clouds

Stratus clouds are similar to altostratus clouds, but form at a lower altitude and are identified by their fog-like appearance, lacking the distinguishing features of most clouds.

Stratus clouds are wider than most clouds, and their base has a smooth, uniform look which is lighter in color than a nimbostratus cloud. The presence of a stratus cloud indicates the possibility of minor precipitation, such as drizzle, but heavier precipitation does not typically arrive in the form of a stratus cloud.

Next Topic: Wall Clouds

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