Weather Alert in Alaska

Recent Locations: Valley Forge, PA   Melville, MT   Kivalina, AK  

Heat Advisory issued August 22 at 5:06AM AKDT until August 23 at 7:00PM AKDT by NWS Juneau AK

AREAS AFFECTED: City of Hyder

DESCRIPTION: * WHAT...Temperatures up to around 80 degrees expected. * WHERE...City of Hyder. * WHEN...From noon to 7 PM AKDT Saturday. * IMPACTS...Individuals not accustomed to these unusually warm temperatures for this region may experience heat related illnesses. * ADDITIONAL DETAILS...Warm temperatures are expected Saturday, reaching into the high 70s to low 80s. Warm temperatures will continue through the rest of the weekend and into the start of next week. Temperatures will be warmer inland, try to wear loose fitting clothing and limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

INSTRUCTION: Drink plenty of fluids and check up on elderly and vulnerable relatives and neighbors. Young children and pets should never be left unattended in vehicles under any circumstances as vehicle interiors can reach extreme temperatures in as little as 10 minutes Take extra precautions when working in the sun. Wear sunscreen and lightweight, loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke Close curtains during the daytime to reduce sun insulation into the home and open windows at night to allow the home to cool off. Utilize fans or community buildings with air conditioning.

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Weather Topic: What are Cirrus Clouds?

Home - Education - Cloud Types - Cirrus Clouds

Cirrus Clouds Next Topic: Condensation

Cirrus clouds are high-level clouds that occur above 20,000 feet and are composed mainly of ice crystals. They are thin and wispy in appearance.

What do they indicate?
They are often the first sign of an approaching storm.

Next Topic: Condensation

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

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