Weather Alert in California
Heat Advisory issued August 30 at 1:13AM PDT until September 2 at 6:00PM PDT by NWS Los Angeles/Oxnard CA
AREAS AFFECTED: Santa Clarita Valley; Los Angeles County Inland Coast including Downtown Los Angeles; Western Santa Monica Mountains Recreational Area; Eastern Santa Monica Mountains Recreational Area; Western San Fernando Valley; Eastern San Fernando Valley; Southeastern Ventura County Valleys; 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...San Fernando Valley, Santa Monica Mountains Recreational Area, Los Angeles County Inland Coast including Downtown Los Angeles, Los Angeles County San Gabriel Valley, Santa Clarita Valley, and Southeastern Ventura County Valleys. * 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 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 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.
Next Topic: Shelf Clouds
Weather Topic: What is Sleet?
Home - Education - Precipitation - Sleet
Next Topic: Snow
Sleet is a form of precipitation in which small ice pellets are the primary
components. These ice pellets are smaller and more translucent than hailstones,
and harder than graupel. Sleet is caused by specific atmospheric conditions and
therefore typically doesn't last for extended periods of time.
The condition which leads to sleet formation requires a warmer body of air to be
wedged in between two sub-freezing bodies of air. When snow falls through a warmer
layer of air it melts, and as it falls through the next sub-freezing body of air
it freezes again, forming ice pellets known as sleet. In some cases, water
droplets don't have time to freeze before reaching the surface and the result is
freezing rain.
Next Topic: Snow
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