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

Station ) 3.5 & ) 10.6 & ) 15.5 &
q roup GPl ( 3.4 m/s (10.5 m/s ( 15.4 m/s ( 20.5 m/s ) 20.6 m/s
Prec i pi tat ion
range (in) Wet Norm Dry Wet Norm Dry Wet Norm Drv Wet Norm Dry Wet Norm Dry
0 9 13 13 39 39 61 25 24 23 3 6 4 2 4 2
>0. - 0.025 1 0 2 6 5 2 3 2 0 1 2 0 1 0 0
>0.025 - 0.05 0 0 1 6 5 2 1 3 0 0 2 0 1 0 1
>0.05 - 0.20 2 0 1 10 3 9 9 5 5 2 5 1 2 1 5
>0.20 - 0.30 0 0 0 4 0 0 1 0 2 3 0 0 0 3 1
>0.30 - 0.40 0 0 0 3 1 0 1 3 0 1 2 0 2 1 1
>0.40 - 0.50 0 1 0 1 0 0 2 1 0 3 1 1 1 1 0
>0.50 - 0.60 0 0 0 2 0 0 0 0 1 1 2 0 0 0 1
>0.60 - 0.70 0 0 0 1 0 0 0 1 0 2 0 0 0 0 0
>0.70 - 0.80 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0
>0.80 0 0 0 1 1 0 1 0 0 2 1 0 2 2 1
**
Total cases 3 1 4 34 15 13 19 15 9 15 15 2 9 8 10

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* The 700 millibar wind speeds were extracted from the 1200 Z sounding at Winslow. Preclpitation
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