Weather Alert in California
Heat Advisory issued August 11 at 3:18AM PDT until August 13 at 9:00AM PDT by NWS Reno NV
AREAS AFFECTED: Surprise Valley California; Lassen-Eastern Plumas-Eastern Sierra Counties; Mineral and Southern Lyon Counties; Greater Reno-Carson City-Minden Area; Western Nevada Basin and Range including Pyramid Lake; Northern Washoe County
DESCRIPTION: * WHAT...High temperatures ranging from 97-104 degrees in valleys and basins, with warmest lows between 65-70 degrees. Widespread Moderate to locally Major HeatRisk. * WHERE...In California, Lassen-Eastern Plumas-Eastern Sierra Counties and Surprise Valley California. In Nevada, Northern Washoe County, Western Nevada Basin and Range including Pyramid Lake, Greater Reno-Carson City-Minden Area, and Mineral and Southern Lyon Counties. * WHEN...From 11 AM this morning to 9 AM PDT Wednesday. * IMPACTS...Heat-related illnesses will be more likely, especially for those spending extended periods outdoors, in poorly cooled indoor spaces, or who are sensitive to heat. * ADDITIONAL DETAILS...Hottest conditions are expected Tuesday afternoon in lower valleys and basins. Cooler conditions above 4500 ft in Lassen-Eastern Plumas-Eastern Sierra counties and along foothill slopes outside the lower valleys.
INSTRUCTION: Drink plenty of fluids, stay in an air-conditioned location, avoid prolonged sun exposure, and check on relatives, neighbors, and pets. Limit strenuous activities to early morning or evening hours.
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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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