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 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
Weather Topic: What are Stratocumulus Clouds?
Home - Education - Cloud Types - Stratocumulus Clouds
Next Topic: Stratus Clouds
Stratocumulus clouds are similar to altocumulus clouds in their
fluffy appearance, but have a slightly darker shade due to their additional mass.
A good way to distinguish the two cloud types is to hold your hand out and measure
the size of an individual cloud; if it is the size of your thumb it is generally
an altocumulus cloud, if it is the size of your hand it is generally a
stratocumulus cloud.
It is uncommon for stratocumulus clouds to produce precipitation, but if they do
it is usually a light rain or snow.
Next Topic: Stratus Clouds
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