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

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Table 17. - Daily precipitation frequencies by Winslow 700 millibar wind speed for each of a wet.
normal and dry winter at station group GP5.*
PRECIPITATION FREQUENCY

Station ) 3.5 & ) 10.6 & ) 15.5 &
qroup GP5 ~ 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 9 14 16 55 49 66 34 35 27 12 16 5 7 10 9
>0. - 0.025 0 0 0 3 1 3 2 0 0 0 0 0 1 0 0
>0.025 - 0.05 1 0 0 1 1 0 2 0 1 1 1 0 1 0 0
>0.05 - 0.20 1 0 1 2 1 2 3 2 1 2 3 0 0 2 3
>0.20 - 0.30 1 0 0 4 1 1 0 1 1 0 0 0 0 0 0
>0.30 - 0.40 0 0 0 2 0 0 0 0 1 0 1 0 0 0 0
>0.40 - 0.50 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0
>0.50 - 0.60 0 0 0 1 1 1 1 0 1 1 0 0 1 0 0
>0.60 - 0.70 0 0 0 1 0 1 0 1 0 0 0 1 0 0 0
>0.70 - 0.80 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0
>0.80 0 0 0 3 0 0 1 0 0 2 0 0 1 0 0
**
Total cases 3 0 1 18 5 8 10 4 5 6 5 1 4 2 3

~
0:>

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