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 14. - Daily precipitation frequencies by Winslow 700 millibar wind speed for each of a
wet. normal and dry winter at station group GP2.*
PRECIPITATION FREQUENCY

Station ) 3.5 & ) 10.6 & ) 15.5 &
group GP2 ( 3.4 m/s (10.5 m/s ( 15.4 m/s ( 20.5 m/s ) 20.6 m/s
Precipitation
range (in) Wet Norm Dry Wet Norm Dry Wet Norm Dry Wet Norm Dr,Y Wet Norm Dry
0 9 12 15 44 47 57 26 28 22 5 9 4 4 4 8
>0. - 0.025 1 1 1 9 2 11 3 3 3 2 3 0 0 1 0
>0.025 - 0.05 0 1 0 4 1 1 4 2 3 1 3 1 1 2 1
>0.05 - 0.20 2 0 1 9 3 2 7 4 1 2 3 1 3 2 1
>0.20 - 0.30 0 0 0 2 0 2 4 0 2 3 0 0 1 0 0
40.30 - 0.40 4 1 1 4 1 1 0 1 0 2 3 0 0 0 1
>0.40 - 0.50 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0
>0.50 - 0.60 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
>0.60 - 0.70 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0
>0.70 - 0.80 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0
>0.80 0 0 0 0 0 0 0 0 0 1 0 0 2 3 1
**
Total cases 7 3 3 29 7 17 18 11 10 13 12 2 7 8 4

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* The 700 mil bar wind speeds were extracted from the 1200 Z sounding at Winslow. Preclpltatlon
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