Weather Alert in Utah

Recent Locations: Britton, MI   Eagle Butte, SD   Lehi, UT  
Current Alerts for Lehi, UT: Fire Weather Watch Red Flag Warning

Fire Weather Watch issued August 2 at 2:57AM MDT until August 4 at 9:00PM MDT by NWS Salt Lake City UT

AREAS AFFECTED: Central Utah West Desert; Color Country West Desert; Mojave Desert

DESCRIPTION: * AFFECTED AREA...Fire Weather Zone 492 Central Utah West Desert, Fire Weather Zone 495 Color Country West Desert and Fire Weather Zone 497 Mojave Desert. * WINDS...Southwest winds 15 to 25 mph with gusts 30 to 35 mph. * RELATIVE HUMIDITY...Falling into the 5 to 9 percent range. * IMPACTS...Critical fire weather conditions are expected. Any new fire starts or existing fires may spread rapidly.

INSTRUCTION: A Fire Weather Watch means that there is a potential for critical fire weather conditions. Continue to monitor for the latest forecasts and for possible Red Flag Warnings.

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Current U.S. National Radar--Current

The Current National Weather Radar is shown below with a UTC Time (subtract 5 hours from UTC to get Eastern Time).

Current U.S. National Radar

National Weather Forecast--Current

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Today's National Weather Map

National Weather Forecast for Tomorrow

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North America Water Vapor (Moisture)

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North American Water Vapor Map

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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