The TSI weather station is located on the roof of the headquarters building in Shoreview (a northern suburb of Saint Paul), Minnesota. The station features meteorological instruments manufactured by Handar, a TSI subsidiary.

Currently the station is displaying

• temperature
• relative humidity
• dewpoint
• barometric pressure
• wind speed and direction

Wind Chill

NOTE: Speeds of 4 miles per hour or less have little effect on the wind chill

The wind chill index shows the effective cooling on exposed skin. When the wind blows across the skin, it removes the insulating layer of warm air adjacent to the skin. When all factors are the same, the faster the wind blows, the greater the heat loss, which results in a colder feeling.

Heat Index

NOTE: Heat Index calculations are only valid for temperatures above 56 deg F.

One approach to describing the combined effects of temperature and humidity is the heat index. To alert the public to the dangers of exposure to extended periods of heat and the added effects of humidity, the National Weather Service has developed a "Heat Index".