Table 7.— Areas of little or no reported winter injury and precipitation of corresponding climatic divisions 



Climatic 



Percent monthly precipitation' 



Area 



division 



Oct. 



Nov. 



Dec. 



Jan. 



Feb. 



Mar. 



Aor. 



COLORADO 



















Arapafio N.F. 



Platte drainage 



83 



62 



59 



53 



54 



65 



89 



Roosevelt N.F. 



















Rio Grande N.F. 



Rio Grande drainage 



39 



45 



33 



41 



47 



42 



52 



MONTANA 



















Custer N.F. 



Southeastern 



107 



94 



87 



108 



100 



121 



92 



Gallatin N.F. 



South-central 



108 



90 



77 



90 



82 



97 



80 



Deer Lodge N.F. 



Central 



51 



67 



60 



73 



77 



81 



70 



Lewis and Clark N.F. 



















OREGON 



















Umatilla N.F. 



North-central 



25 



24 



21 



20 



24 



30 



28 



Wallowa-Whitman N.F. 



















Baker (BLM) 



Northeast 



30 



28 



23 



25 



28 



36 



35 



WYOMING 



















Bighorn N.F. 



Bighorn 



113 



83 



73 



81 



78 



70 



71 



Worland (BLM) 



Powder Little Missouri, and 

 Tongue drainage 



132 



116 



100 



111 



115 



131 



110 



Casper (BLM) 



Belle Fourche drainage 



71 



104 



93 



112 



114 



130 



107 





Cheyenne and Niobrara drainage 



68 



94 



86 



92 



81 



100 



103 



Medicine Bow N.F. 



Upper Platte drainage 



57 



40 



40 



47 



48 



65 



74 



Rawlins (BLM) 



Lower Platte drainage 



64 



56 



51 



55 



52 



64 



84 





Wind River 



97 



70 



63 



68 



67 



104 



93 



'Average percent of accumulated normal based on 1941-70 normal. 



80-- 



70-- 



60-- 



50-- 



40-- 



30-- 



20-- 



10-- 



AC CUM. % NORM. Q 

 IN. ACCUM. PRECIP. <^ 



OCT NOV DEC 



JAN 



FEB MAR 



APR 



1976-1977 



Figure 9.— Comparison of precipitation in 

 areas of low and high amounts of winter 

 injury. 



14 



