Weather Alert in Colorado

Recent Locations: Vail, CO  

Red Flag Warning issued June 20 at 1:03AM MDT until June 21 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 Fire Weather Watch for gusty winds and low relative humidity, which is in effect from Sunday morning through Sunday evening. * AFFECTED AREA...Fire Weather Zones 220 and 223. * TIMING...For the first Red Flag Warning, from 10 AM this morning to 10 PM MDT this evening. For the second Red Flag Warning, from 10 AM to 10 PM MDT Saturday. For the Fire Weather Watch, from Sunday morning through Sunday evening. * WINDS...For today, southwest winds at 15 to 25 mph with gusts to 40. For Saturday, southwest winds at 20 to 30 mph with gusts to 50 mph. For Sunday southwest winds at 20 t0 30 mph with gusts to 50 mph. * RELATIVE HUMIDITY...For today, in the low teens. For tomorrow, in the single digits. For Sunday, in the low teens. * 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 Contrails?

Home - Education - Cloud Types - Contrails

Contrails Next Topic: Cumulonimbus Clouds

A contrail is an artificial cloud, created by the passing of an aircraft.

Contrails form because water vapor in the exhaust of aircraft engines is suspended in the air under certain temperatures and humidity conditions. These contrails are called exhaust contrails.

Another type of contrail can form due to a temporary reduction in air pressure moving over the plane's surface, causing condensation. These are called aerodynamic contrails.

When you can see your breath on a cold day, it is also because of condensation. The reason contrails last longer than the condensation from your breath is because the water in contrails freezes into ice particles.

Next Topic: Cumulonimbus Clouds

Weather Topic: What are Cumulus Clouds?

Home - Education - Cloud Types - Cumulus Clouds

Cumulus Clouds Next Topic: Drizzle

Cumulus clouds are fluffy and textured with rounded tops, and may have flat bottoms. The border of a cumulus cloud is clearly defined, and can have the appearance of cotton or cauliflower.

Cumulus clouds form at low altitudes (rarely above 2 km) but can grow very tall, becoming cumulus congestus and possibly the even taller cumulonimbus clouds. When cumulus clouds become taller, they have a greater chance of producing precipitation.

Next Topic: Drizzle

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