Weather Alert in Arizona
Flash Flood Warning issued August 24 at 2:52PM MST until August 24 at 5:45PM MST by NWS Flagstaff AZ
AREAS AFFECTED: Yavapai, AZ
DESCRIPTION: FFWFGZ The National Weather Service in Flagstaff has issued a * Flash Flood Warning for... Skull Valley Wash in Yavapai County in west central Arizona... * Until 545 PM MST. * At 252 PM MST, Doppler radar indicated thunderstorms producing heavy rain near Skull Valley. Between 1.5 and 2.25 inches of rain have fallen. Additional rainfall amounts up to 1 inch are possible in the warned area. Flash flooding is ongoing or expected to begin shortly. HAZARD...Life threatening flash flooding. Thunderstorms producing flash flooding. SOURCE...Radar indicated. IMPACT...Life threatening flash flooding of creeks and streams, normally dry washes, urban areas, highways, streets and underpasses. * Some locations that will experience flash flooding include... Wilhoit, Copper Basin, Skull Valley and Kirkland. This includes State Route 89 between mile markers 293 and 294. This includes the following creeks, washes and rivers... Iron Springs Wash, Sycamore Creek, Willow Creek, Skull Valley Wash, Kirkland Creek, Logan Wash, Copper Basin Wash, Tonto Wash, Woolsey Wash, Finch Wash and Burnt Wash.
INSTRUCTION: Flooding of washes and creeks will occur, some dirt roads will become muddy and impassable. Paved roads and underpasses could become flooded as well. Be aware of your surroundings and do not drive on flooded roads. Low water crossings will become dangerous in heavy rain. Do not attempt to cross flooded roads. Find an alternate route.
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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
Weather Topic: What are Shelf Clouds?
Home - Education - Cloud Types - Shelf Clouds
Next Topic: Sleet
A shelf cloud is similar to a wall cloud, but forms at the front
of a storm cloud, instead of at the rear, where wall clouds form.
A shelf cloud is caused by a series of events set into motion by the advancing
storm; first, cool air settles along the ground where precipitation has just fallen.
As the cool air is brought in, the warmer air is displaced, and rises above it,
because it is less dense. When the warmer air reaches the bottom of the storm cloud,
it begins to cool again, and the resulting condensation is a visible shelf cloud.
Next Topic: Sleet
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