Weather Alert in Arizona
Flood Watch issued September 4 at 12:49AM MST until September 4 at 11:00PM MST by NWS Flagstaff AZ
AREAS AFFECTED: Yavapai County Mountains; Northern Gila County; Yavapai County Valleys and Basins
DESCRIPTION: * WHAT...Flooding caused by excessive rainfall is possible. * WHERE...Portions of east central and west central Arizona, including the following areas, in east central Arizona, Northern Gila County. In west central Arizona, Yavapai County Mountains and Yavapai County Valleys and Basins. * WHEN...From 11 AM MST this morning through this evening. * IMPACTS...Flooding will be possible in creeks, normally dry washes, and swimming holes. Low-water crossings could also become flooded, which would create deadly travel conditions. Low-water crossings may be flooded. * ADDITIONAL DETAILS... - Tropical moisture will enhance localized flooding concerns from potential heavy rainfall. - Additional information is available at weather.gov/flagstaff.
INSTRUCTION: You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
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Weather Topic: What are Nimbostratus Clouds?
Home - Education - Cloud Types - 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
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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