Abstract: On Sept. 5, 1970, 10.99 in. of rain fell in 1 observational day at the National Weather Service cooperative station known as Workman Creek 1, Ariz. A 30-yr series of observations is analyzed to estimate the return period ...

Abstract: Daily minimum temperature averages for the Phoenix City Office based on 61 years of record show a definite rise in the period January 9?17, with relatively lower values in the 9-day periods preceding and following. This ...

Abstract: Minimum temperature formulas for clear nights in December, January, and February are developed by the Young method and tested on both original and test data. The results of these tests lead to a discussion of some weaknesses ...

Abstract: A typical ceilometer record during rainfall is examined and certain regular and recurring oscillations beginning uniformly at an angle of elevation of 48° and decreasing gradually with elevation are noted. These features ...

Abstract: Observations of the distribution of minute foreign particles introduced into a small, mechanically produced air vortex are briefly described. Ideas that grew from these observations are developed quantitatively into a ...

Abstract: Previous investigations indicate that the freeze date variance varies slowly with geographical factors over parts of the United States. Evidence is presented here which indicates that the variation may be greater over the ...