Download release - TeacherTube

Attention Teachers
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The purpose of this presentation is to help you explain Chinook winds
to your students.
Before you do this, make sure that YOU understand them! Go to
www.formontana.net/chinook.html and carefully read (and watch)
everything.
NOTE: As I teach about Chinook winds, I do not include any math or
scary words like “adiabatic”, which they will never hear again the rest of
their lives.
To view the notes part of the presentation, select “Notes Page” beneath
“View” (PowerPoint tool bar).
Feel free to edit the presentation. You can easily change the color
scheme.
NEXT SLIDE is start of presentation.
How is this possible?
• At Browning on Feb. 10, 1988 the
temperature rose from 13 F to 46 F
between 8 am and noon.
• January 11, 1980: Temperature at the
Great Falls Airport rose from -32F to
15F in seven minutes
• At Loma on January 15, 1972 temp.
increased from -54 F to 49 F
Not just Montana
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Spearfish, SD on January 22,1943
7:30 am temp was -4 F
In 2 minutes it rose 49 degrees
9:00 am temp was 54 F
By 9:30 am temp was -4 F again
Chinook Wind
• Unusually warm
winter wind
YouTube Demo
What do the red arrows have in common?
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SLUSH
-4C
(no Chinook)
Chinook Wind
Water Vapor
Water molecules
release heat.
Water molecules
absorb heat.
Liquid Water
Surrounding air
gets warmer.
Surrounding air
gets colder.
Frozen Water
(Ice)
Why are Chinooks most common in this area?
Snow-Eaters
• Humid air is forced up west slopes of mountains.
• Clouds form as air cools by expansion.
• Heat released as vapor changes to cloud
crystals (snow).
The Blackfoot Confederacy
CLICK HERE to watch "The Bear
Who Stole the Chinook"
Jack
Gladstone
NOTE: “Siksika” is one of the tribes in the Blackfoot Confederacy.
What are the ideal conditions?
How can this map help find Chinook Zones?
What about the Appalachians?
For more information, go to
www.formontana.net/thebear.html