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Afternoon Ventilation Index
National Weather Service
Grand Junction, CO
Grand Junction, CO
About the Ventilation Index (VI)
Mixing Height times Transport Wind = VI
Mixing Height = Calculated for forecast max temperature
Transport Wind = Average wind speed from SFC to Mixing Height (knots)
Shown in Knot Feet
Mixing Height = Calculated for forecast max temperature
Transport Wind = Average wind speed from SFC to Mixing Height (knots)
Shown in Knot Feet
Valid: Wednesday February 10, 2010
Valid: Thursday February 11, 2010
Valid: NO IMAGES AVAILABLE
| Category | Range | Units |
|---|---|---|
| POOR | < 40,000 | Knot Feet |
| FAIR | 40,000 to 59,999 | Knot Feet |
| GOOD | 60,000 to 99,999 | Knot Feet |
| VERY GOOD | 100,000 to 149,999 | Knot Feet |
| EXCELLENT | >= 150,000 | Knot Feet |
- National Weather Service
- Grand Junction, CO Weather Forecast Office
- 792 Eagle Drive
- Grand Junction, CO 81506-8646
- 970-243-7007
- Page Author: GJT Webmaster
- Web Master's E-mail: w-gjt.webmaster@noaa.gov
- Page last modified: 21-Nov-2005 4:32 PM UTC