Weather Alert in Arizona
Red Flag Warning issued June 17 at 12:36AM MST until June 17 at 8:00PM MST by NWS Flagstaff AZ
AREAS AFFECTED: Chuska Mountains and Defiance Plateau; Little Colorado River Valley in Navajo County; Little Colorado River Valley in Apache County; Northeast Plateaus and Mesas South of Hwy 264
DESCRIPTION: MST Tue Jun 17 2025/ ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM MST /NOON MDT/ THIS MORNING TO 8 PM MST /9 PM MDT/ THIS EVENING FOR PORTIONS OF NORTHEAST ARIZONA... * AFFECTED AREA...Locations near Buffalo Pass, Dilkon, Eagar- Springerville, Ganado, Holbrook, Kykotsmovi, Saint Johns, Snowflake-Taylor, Window Rock and Winslow. * WINDS...West 15 to 25 mph with gusts up to 40 mph. * RELATIVE HUMIDITY...5 to 10 percent. * IMPACTS...Any fires that develop or are ongoing will have the potential to spread rapidly.
INSTRUCTION: A Red Flag Warning means that critical fire weather conditions are either occurring or are imminent. A combination of strong winds and low relative humidities can contribute to extreme fire behavior. Please notify field crews of this Red Flag Warning.
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Weather Topic: What are Contrails?
Home - Education - Cloud Types - 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
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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