• Air Quality Forecast
• Current Air Quality
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• Air Quality Basics
• Air Quality Data & Reports
  • Request for Air Quality Data
  • Wind Rose
  • Trend Graphing Tool
  • Air Graphing Tool
  • Monitoring Network Map

Today's Forecast
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Snohomish
Tomorrow's Forecast
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Kitsap
Pierce
Snohomish
Forecast Discussion Current Air Quality Data and Reports

• 73% of Washingtonians drive alone to work, rather than walk, bike, bus or carpool. More.

Wind Rose

The length of the vectors on our wind rose graph show the percentage of time the wind blew from each direction. Wind speed, pollutant concentration, or temperature is delineated by color and width of the brackets.

To use the Wind Rose:

• Enter the start and end dates for the data set in the format mm/dd/yyyy. The end date must be later than the start date, and no dates earlier than 1/1/1990 will be accepted.

• Note that you must tab or click between the date entry fields to trigger date validation routines which activate the Refresh button if successful. Any date entry problems requiring action are described beneath the input fields.

• Click Refresh. The Parameter and Station lists populate according to data available for the selected dates.

• After selecting the desired parameter and station, click Display to generate the wind rose.