WMOD00285 ‎(2)‎

• Title: Feasibility Study of Wintertime Cloud Seeding to Augment Arizona Water Supplies
• Date: 1/1/1987
• State: AZ
• Weather Modification - Doc Type: Report

,- - - - - - - - - - - - - - - - - - -
Table 15. - Daily precipitation frequencies by Winslow 700 millibar wind speed for each of a
wet normal and dry winter at station group GP3.*
PRECIPITATION FREQUENCY

Station ;> 3.5 & ;> 10.6 & ;> 15.5 &
q roup GP3 ~ 3.4 m/s ~10.5 m/s ~ 15.4 m/s ~ 20.5 m/s ;> 20.6 m/s
Precipitation
ranqe (in) Wet Norm Dry Wet Norm Dry Wet Norm Dry Wet Norm Dry Wet Norm Dry
0 7 13 14 39 45 55 24 27 22 4 10 3 4 5 6
>0. - 0.025 1 1 1 4 1 5 0 4 1 1 3 0 0 0 1
>0.025 - 0.05 0 0 0 5 2 6 3 1 0 0 1 0 0 2 1
>0.05 - 0.20 3 0 1 13 4 6 10 4 4 3 4 2 3 1 2
>0.20 - 0.30 1 0 1 5 0 1 2 1 1 2 1 1 0 1 0
>0.30 - 0.40 0 0 0 2 0 0 4 1 2 3 1 0 1 0 1
>0.40 - 0.50 0 0 0 1 0 0 1 1 1 2 0 0 0 0 0
>0.50 - 0.60 0 0 0 2 0 0 0 0 0 2 0 0 1 0 1
>0.60 - 0.70 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0
>0.70 - 0.80 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0
>0.80 0 0 0 2 2 0 0 0 1 1 0 0 1 3 0
**
Total cases 5 1 3 34 9 19 20 12 10 14 11 3 7 7 6

~
0)

* The 700 millibar wind speeds were extracted from the 1200 Z sounding at Winslow. Precipitatlon
measurements were generally taken at 1800 local. The wet normal and dry winters were respec-
tively, 1982-83, 1981-82, 1980-81.
** Values exclude zero precipitation counts