Weather Alert in Colorado

Recent Locations: Denver, CO  
Current Alerts for Denver, CO: Heat Advisory

Red Flag Warning issued June 19 at 1:50PM MDT until June 20 at 10:00PM MDT by NWS Pueblo CO

AREAS AFFECTED: Upper Arkansas River Valley Including Lake County and Chaffee County; Eastern San Juan Mountains and La Garita Mountains Including Wolf Creek Pass and Creede

DESCRIPTION: The National Weather Service in Pueblo has issued a Red Flag Warning for gusty winds and low relative humidity, which is in effect from 10 AM to 10 PM MDT Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...Fire Weather Zones 220 and 223. * TIMING...For the first Red Flag Warning, from 10 AM to 10 PM MDT Friday. For the second Red Flag Warning, from 10 AM to 10 PM MDT Saturday. * WINDS...For Friday, Southwest 15 to 25 mph with gusts up to 40 mph. For Saturday, southwest winds 20 to 30 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...As low as 12 percent for Friday. As low as 9 percent for Saturday. * 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.

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Weather Topic: What is Sleet?

Home - Education - Precipitation - Sleet

Sleet Next Topic: Snow

Sleet is a form of precipitation in which small ice pellets are the primary components. These ice pellets are smaller and more translucent than hailstones, and harder than graupel. Sleet is caused by specific atmospheric conditions and therefore typically doesn't last for extended periods of time.

The condition which leads to sleet formation requires a warmer body of air to be wedged in between two sub-freezing bodies of air. When snow falls through a warmer layer of air it melts, and as it falls through the next sub-freezing body of air it freezes again, forming ice pellets known as sleet. In some cases, water droplets don't have time to freeze before reaching the surface and the result is freezing rain.

Next Topic: Snow

Weather Topic: What are Stratocumulus Clouds?

Home - Education - Cloud Types - Stratocumulus Clouds

Stratocumulus Clouds Next Topic: Stratus Clouds

Stratocumulus clouds are similar to altocumulus clouds in their fluffy appearance, but have a slightly darker shade due to their additional mass.

A good way to distinguish the two cloud types is to hold your hand out and measure the size of an individual cloud; if it is the size of your thumb it is generally an altocumulus cloud, if it is the size of your hand it is generally a stratocumulus cloud.

It is uncommon for stratocumulus clouds to produce precipitation, but if they do it is usually a light rain or snow.

Next Topic: Stratus Clouds

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