Visibility Details
Current Visibility1
05/09/2008 03:30 PM

Visual Range

Miles

km

Deciviews

Current Quarter

2nd
 Visibility Statistics (km)


Est. of Natural Visibility2

XX

XX

XX

1998-2001 Monitoring Period

Measured Annual Average3

55

100

162

Measured 1st qtr. Average

Measured 2nd qtr. Average

Measured 3rd qtr. Average

Measured 4th qtr. Average

XX

XX

XX

XX

XX

XX

XX

XX

XX

XX

XX

XX

1. The estimated visual range measurements presented here were derived from hourly ambient nephelometer scattering measurements.
2. Derived from Draft Guidance for Estimated Natural Visibility Conditions Under the Regional Haze Program, Appendix B, May 2002.
3. Generated from IMPROVE aerosol data, Columbia River Gorge - Wishram, 1993-1999