Weather Alert in Colorado
Red Flag Warning issued June 20 at 1:41AM MDT until June 22 at 12:00AM MDT by NWS Grand Junction CO
AREAS AFFECTED: Little Snake; White River; Southwest Colorado Lower Forecast Area; Paradox Valley; Northern San Juan; North Fork; Gunnison Basin; Southwest Colorado Upper West Forecast Area; Eastern Uintah Basin; Book Cliffs; Colorado River Basin; Southeast Utah
DESCRIPTION: ...RED FLAG WARNING REMAINS IN EFFECT FROM 9 AM SATURDAY TO MIDNIGHT MDT SATURDAY NIGHT FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS FOR FIRE WEATHER ZONES 200, 202, 207, 290, 291, 292, 293, 294, 486, 487, 490, AND 491... ...FIRE WEATHER WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH SUNDAY EVENING FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS FOR FIRE WEATHER ZONES 200, 202, 207, 290, 291, 292, 293, 294, 486, 487, 490, AND 491... The National Weather Service in Grand Junction has issued a Fire Weather Watch for gusty winds, low relative humidity and dry fuels, which is in effect from Sunday afternoon through Sunday evening. * AFFECTED AREA...In Colorado, Fire Weather Zone 200 Little Snake Forecast Area, Fire Weather Zone 202 White River Forecast Area, Fire Weather Zone 207 Southwest Colorado Lower Forecast Area, Fire Weather Zone 290 Paradox Valley Forecast Area, Fire Weather Zone 291 Northern San Juan Forecast Area, Fire Weather Zone 292 North Fork Forecast Area, Fire Weather Zone 293 Gunnison Basin Forecast Area and Fire Weather Zone 294 Southwest Colorado Upper West Forecast Area. In Utah, Fire Weather Zone 486 Eastern Uinta Basin, Fire Weather Zone 487 Book Cliffs, Fire Weather Zone 490 Colorado River Basin and Fire Weather Zone 491 Southeast Utah. * TIMING...For the first Red Flag Warning, from 9 AM this morning to midnight MDT tonight. For the second Red Flag Warning, from 9 AM Saturday to midnight MDT Saturday night. For the Fire Weather Watch, from Sunday afternoon through Sunday evening. * WINDS...Southwest 15 to 30 mph with gusts 30 to 50 mph. * RELATIVE HUMIDITY...3 to 8 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 combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings.
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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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