Weather Alert in Colorado
Red Flag Warning issued June 15 at 1:44PM MDT until June 16 at 8:00PM MDT by NWS Grand Junction CO
AREAS AFFECTED: Lower Colorado River; Colorado River Headwaters
DESCRIPTION: The National Weather Service in Grand Junction has issued a Red Flag Warning below 7000 feet for gusty winds, low relative humidity and dry fuels, which is in effect from 1 PM to 8 PM MDT Monday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Colorado, Fire Weather Zone 203 Lower Colorado River and Fire Weather Zone 205 Colorado River Headwaters below 7000 feet. * TIMING...From 1 PM to 8 PM MDT Monday. * WINDS...Southwest 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...5 to 10 percent. * IMPACTS...Fires will catch and spread quickly. Exercise extreme caution with any outdoor burning.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior.
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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
Weather Topic: What is Snow?
Home - Education - Precipitation - Snow
Next Topic: Stratocumulus Clouds
Snow is precipitation taking the form of ice crystals. Each ice crystal, or snowflake,
has unique characteristics, but all of them grow in a hexagonal structure.
Snowfall can last for sustained periods of time and result in significant buildup
of snow on the ground.
On the earth's surface, snow starts out light and powdery, but as it begins to melt
it tends to become more granular, producing small bits of ice which have the consistency of
sand. After several cycles of melting and freezing, snow can become very dense
and ice-like, commonly known as snow pack.
Next Topic: Stratocumulus Clouds
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