Accession Number:

ADA053186

Title:

Correlation of Radar Reflectivity and Snowfall Rate during Moderate to Heavy Snow

Descriptive Note:

Interim rept.

Corporate Author:

AIR FORCE GEOPHYSICS LAB HANSCOM AFB MA

Personal Author(s):

Report Date:

1978-04-03

Pagination or Media Count:

6.0

Abstract:

Radar reflectivity in falling snow varies slightly with prevailing types of snow crystals. Experimental results in major New England snowstorms indicate that the most significant difference in determining the rate of snowfall by radar reflectivity occurs between wet and dry snow. In dry snow surface temperature below freezing, the correlation coefficient between radar returns and snowfall rate runs as high as r 0.85. However, in wet snow surface temperature above freezing with bright band characteristics, the correlation coefficient is very poor, as low as r 0.35. In spite of this anticipated problem, radar is a reliable means of determining dry snowfall rates and provides a potential technique for snowfall forecast improvement. Author

Subject Categories:

  • Meteorology
  • Active and Passive Radar Detection and Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE