Weather Alert in California

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Heat Advisory issued August 30 at 6:06AM PDT until September 2 at 6:00PM PDT by NWS Los Angeles/Oxnard CA

AREAS AFFECTED: Santa Clarita Valley; Lake Casitas; Ojai Valley; Central Ventura County Valleys; Los Angeles County Inland Coast including Downtown Los Angeles; Western Santa Monica Mountains Recreational Area; Eastern Santa Monica Mountains Recreational Area; Calabasas and Agoura Hills; Western San Fernando Valley; Eastern San Fernando Valley; Southeastern Ventura County Valleys; Santa Susana Mountains; Southern Ventura County Mountains; Interstate 5 Corridor; Western San Gabriel Mountains and Highway 14 Corridor; Los Angeles County San Gabriel Valley

DESCRIPTION: * WHAT...Hot daytime conditions with high temperatures of 96 to 106 degrees common, and warm overnight conditions. * WHERE...Coastal valleys and lower mountains of Los Angeles and Ventura Counties, as well as the Los Angeles County Inland Coastal Plain which includes Downtown Los Angeles. * WHEN...From 10 AM Monday to 6 PM PDT Tuesday. * IMPACTS...There is a high risk for heat illness for sensitive populations including the very young, the very old, those without air conditioning, and those active outdoors. * ADDITIONAL DETAILS...This advisory may need to be extended through Wednesday.

INSTRUCTION: Limit strenuous outdoor activities (like hiking) to the early morning hours. Stay in air conditioned spaces during the heat of the day. Check up on relatives and neighbors.

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Weather Topic: What are Nimbostratus Clouds?

Home - Education - Cloud Types - Nimbostratus Clouds

Nimbostratus Clouds Next Topic: Precipitation

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.

Next Topic: Precipitation

Weather Topic: What is Rain?

Home - Education - Precipitation - Rain

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.

Next Topic: Shelf Clouds

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