Temperature
Alcohol and Mercury
Thermometers
Stevenson Screen
Bimetallic Strip Thermometers
Thermisters
ASOS Temperature/Humidity
Senor
Radiometers
All Temperatures Are Local
• Temperatures can vary in small distances
due to a number of factors:
– Proximity to water
– Elevation
– Surface characteristics/urban heat island.
The Most Extreme Cold
Locations Puts All of These
Together
• Valley
• Vegetated with snow
• Away from water
The records are
all east of the
Cascades
On December 30,
1968 both Mazama
and Winthrop, WA
dropped to -48F—
the state record.
Why there?
Winthrop
and Mazama
are in a deep
valley of the
northeast
Cascades
•The Cascades shield the valley from the
warm air of the Pacific
•Snow promotes cooling
•Lack of clouds helps cool
How NOT to Get Dependable
Temperatures