Weather Alert in Montana
Red Flag Warning issued August 12 at 12:57PM MDT until August 13 at 8:00PM MDT by NWS Missoula MT
AREAS AFFECTED: Eastern Beaverhead National Forest
DESCRIPTION: The National Weather Service in Missoula has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon to 8 PM MDT Wednesday. A Fire Weather Watch has also been issued for wind and low relative humidity from Thursday afternoon through Thursday evening. * AFFECTED AREA...Fire Zone 111 East Beaverhead. * TIMING...For the Red Flag Warning, from noon to 8 PM MDT Wednesday. For the Fire Weather Watch, from Thursday afternoon through Thursday evening. * WINDS...West 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...10-17 percent. * IMPACTS...Elevated fire danger is expected. Fires will catch and spread rapidly and erratically.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A Fire Weather Watch means that critical fire weather conditions are forecast to occur.
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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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