Weather Alerts for Colorado
1. Fire Weather Watch for: North and Northeast Elbert County Below 6000 Feet/North Lincoln County; Southeast Elbert County Below 6000 Feet/South Lincoln County
2. Fire Weather Watch for: San Luis Valley Including Alamosa/Del Norte/Fort Garland/Saguache
3. Fire Weather Watch for: Yuma; Kit Carson County; Cheyenne; Wallace; Greeley; Wichita
4. Freeze Warning for: Animas River Basin; San Juan River Basin
5. Freeze Warning for: Four Corners/Upper Dolores River
6. Freeze Watch for: Animas River Basin; San Juan River Basin
7. Freeze Watch for: Four Corners/Upper Dolores River
8. Freeze Watch for: Lower Yampa River Basin; Grand Valley; Debeque to Silt Corridor; Central Colorado River Basin; Central Gunnison and Uncompahgre River Basin; Paradox Valley/Lower Dolores River; Eastern Uinta Basin; Arches/Grand Flat; Canyonlands/Natural Bridges
9. Red Flag Warning for: Southern El Paso County Including Fort Carson and Colorado Springs; Pueblo County Including Pueblo; Huerfano County Including Walsenburg; Western Las Animas County Including Trinidad and Thatcher; Crowley County Including Ordway; Otero County Including La Junta and Western Comanche Grasslands; Eastern Las Animas County Including Pinon Canyon; Kiowa County Including Eads; Bent County Including Las Animas; Prowers County Including Lamar; Baca County Including Springfield and Eastern Comanche Grasslands
10. Special Weather Statement for: Roan and Tavaputs Plateaus; Grand Valley
11. Wind Advisory for: Central Yampa River Basin; Upper Yampa River Basin
12. Wind Advisory for: Four Corners/Upper Dolores River
13. Wind Advisory for: Lower Yampa River Basin; Grand Valley; Debeque to Silt Corridor; Central Colorado River Basin; Central Gunnison and Uncompahgre River Basin; Paradox Valley/Lower Dolores River; Eastern Uinta Basin; Arches/Grand Flat; Canyonlands/Natural Bridges
14. Winter Weather Advisory for: Elkhead and Park Mountains; Flat Tops
15. Winter Weather Advisory for: Grand and Battlement Mesas; Gore and Elk Mountains/Central Mountain Valleys; West Elk and Sawatch Mountains
16. Winter Weather Advisory for: Northwestern San Juan Mountains; Southwest San Juan Mountains
17. Winter Weather Advisory for: West Jackson and West Grand Counties Above 9000 Feet; South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet; South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet
18. Winter Weather Advisory for: Western Mosquito Range/East Lake County Above 11000 Ft; Eastern Sawatch Mountains above 11000 Ft; La Garita Mountains Above 10000 Ft; Eastern San Juan Mountains Above 10000 Ft
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North America Water Vapor (Moisture)
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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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