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_, <br /> I <br /> � Thc coetilclents(m and n) hsve been determined for aU mejor citlst lor the Z-, 3-, 10-� 23-� 30-,and 100-yeer MRIa. <br /> The raneo ot ateuncy is l�om 3-minute duretlon to 1�440-minute durmdon (24 hours). Th�p tqwtlon� have beln r ��, <br /> developed trom ihe 1977 Natlonal Or�enle an0 Atmotpherle Administntlon (NOAA) AtLe i, "pr�cipltatlan- ( �; <br /> F��qwnCy Atlas ot ctie Weatern UNtetl Sntes, Volmne IX-Wash�naWn"� The relnfall eh�rtf (S�c. t-7.iH) wen -�� <br /> developed from an oldtr weather burcab �tiaa� RaL;fall Froqueney Atlae ot the Unittd Sqtrq TechNcal Paper <br /> No.40. Fc.r thie r�awn, th� two will not alwayt yleld tlie aame ansaars. <br /> Ralntnll lmm�siry eoeflltl�nu Gn bt obtt:ned for other geogrophical areae and So�dutatlon�=n�t��than 20 houre 6y <br /> contact7ng the Headqwrters HydrauLca Sectfon. <br /> _ � �, <br /> .' �_' <br /> May 1989 2 _8 <br /> r <br />