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 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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