HEAVY-FOG REGIONS IN THE CONTERMINOUS UNITED STATES1
- 1 February 1969
- journal article
- Published by American Meteorological Society in Monthly Weather Review
- Vol. 97 (2) , 116-123
- https://doi.org/10.1175/1520-0493(1969)097<0116:hritcu>2.3.co;2
Abstract
The heavy-fog statistics for 256 first-order weather stations were utilized to update analyses of the geographic distribution of fog within the conterminous United States. The survey shows that heavy fog (visibility one-fourth mile or less) occurs more than 20 days a year at approximately 50 percent of the first-order weather stations (of which 229 are air terminals) and that the mean heavy-fog frequency reported per station appears to be generally higher than it was 30 yr ago. The geographic distribution of heavy fog is shown in two ways—by a conventional isopleth analysis and by fog climatic regions with characteristic frequency distributions.Keywords
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