Weather Alert in California
Fire Weather Watch issued June 19 at 12:24PM PDT until June 22 at 11:00AM 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; Southern Motherlode From 1000 to 3000 Ft/Calaveras and Toulumne Counties; Southeast Edge Shasta/Trinity NF and Western Portions of Tehama/Glenn RU; Northern Sierra Foothills from 1000 to 3000 Ft. Includes Nevada-Yuba-Placer RU and Anador-Eldorado RU; Eastern Mendocino NF
DESCRIPTION: The National Weather Service in Sacramento has issued a Fire Weather Watch for gusty winds and low humidity, which is in effect from Saturday morning through Sunday morning. * Winds...North winds 15 to 25 mph with gusts up of 30 to 40 mph. Strongest winds expected across the Sacramento Valley along and west of Interstate 5, the Delta, and the northern San Joaquin Valley. * Humidity...Minimum daytime humidity: 15 to 25 percent. Overnight recoveries in the mid 40s to mid 50s. * Highest Threat...Sacramento Valley along and west of the I-5 corridor, adjacent Coastal Range, 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 Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.
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Weather Topic: What are Mammatus Clouds?
Home - Education - Cloud Types - 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
Weather Topic: What is Precipitation?
Home - Education - Precipitation - Precipitation
Next Topic: Rain
Precipitation can refer to many different forms of water that
may fall from clouds. Precipitation occurs after a cloud has become saturated to
the point where its water particles are more dense than the air below the cloud.
In most cases, precipitation will reach the ground, but it is not uncommon for
precipitation to evaporate before it reaches the earth's surface.
When precipitation evaporates before it contacts the ground it is called Virga.
Graupel, hail, sleet, rain, drizzle, and snow are forms of precipitation, but fog
and mist are not considered precipitation because the water vapor which
constitutes them isn't dense enough to fall to the ground.
Next Topic: Rain
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