Weather Alert in California
Avalanche Warning issued February 24 at 5:44AM PST by NWS Reno NV
AREAS AFFECTED: Greater Lake Tahoe Area; Greater Lake Tahoe Area
DESCRIPTION: AVWREV The following message is transmitted at the request of the U.S. Forest Service Sierra Avalanche Center. BACKCOUNTRY AVALANCHE WARNING IMMEDIATE BROADCAST REQUESTED 05:30 PST Tue Feb 24 2026 The Sierra Avalanche Center in Truckee has issued a BACKCOUNTRY AVALANCHE WARNING for the following areas: NWS Reno NV - NVZ002 (Greater Lake Tahoe)...CAZ072 (Greater Lake Tahoe (CA)) * WHAT...HIGH avalanche danger exists in the backcountry. Large avalanches are expected across backcountry terrain. * WHERE...Central Sierra Nevada Mountains between Yuba Pass (Hwy 49) on the north and Ebbetts Pass (Hwy 4) on the south, including the greater Lake Tahoe area. This applies only to backcountry areas, not to ski areas and highways where avalanche mitigation programs exist. * WHEN...In effect from Tue 05:30 PST to Wed 07:00 PST. * IMPACTS...Significant rain on snow at all elevations will create widespread dangerous avalanche conditions in the mountains. Large avalanches capable of burying or injuring people are very likely in backcountry areas. Avalanches could travel farther downslope than usual and may run into areas traditionally thought of as safe. Natural avalanches are likely, and human-triggered avalanches are very likely. * PRECAUTIONARY / PREPAREDNESS ACTIONS...Very dangerous avalanche conditions exist in the backcountry. Traveling in, near, or below backcountry avalanche terrain is not recommended during HIGH avalanche danger. Consult https://www.sierraavalanchecenter.org/ or www.avalanche.org for more detailed information. Similar avalanche danger may exist at locations outside the coverage area of this or any avalanche center.
INSTRUCTION: N/A
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Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - Nimbostratus Clouds
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A nimbostratus cloud is similar to a stratus cloud in its formless,
smooth appearance. However, a nimbostratus cloud is darker than a stratus cloud,
because it is thicker.
Unlike a stratus cloud, a nimbostratus cloud typically brings with it the threat
of moderate to heavy precipitation. In some cases, the precipitation may evaporate
before reaching the ground, a phenomenon known as virga.
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Weather Topic: What is Rain?
Home - Education - Precipitation - Rain
Next Topic: Shelf Clouds
Precipitation in the form of water droplets is called rain.
Rain generally has a tendency to fall with less intensity over a greater period
of time, and when rainfall is more severe it is usually less sustained.
Rain is the most common form of precipitation and happens with greater frequency
depending on the season and regional influences. Cities have been shown to have
an observable effect on rainfall, due to an effect called the urban heat island.
Compared to upwind, monthly rainfall between twenty and forty miles downwind of
cities is 30% greater.
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