186 the Great Wind of April 11-12, 1934, On
186 MONTHLY WEATHER REVIEW JUNE 1934 THE GREAT WIND OF APRIL 11-12, 1934, ON MOUNT WASHINGTON, N.H., AND ITS MEASUREMENT PARTI WINDS OF SUPERHURRICANE FORCE, AND A HEATED ANEMOMETER FOR THEIR MEASUREMENT DURING ICE- FORMING CONDITIONS 1 By SALVATOREPAGLUICA [Mount Washington, N.H. (post oftica, Gorham, N.H.). July 19341 Ea.rly m,ethods a.nd results.-While this article discusses March 1881: “During March 1881, frost formation pre- chiefly the estremely high winds which have long been vented wind velocity readings on 27 days.” known to occur on Mount Washington, N.H., that portion The n.ew m.ethod.-It was obvious at the time of reoccu- of it which describe.s the sturdy heated anemometer pa.ncy of the summit of Mount Washington for meteoro- recently built for this station, and which automatically logical observations, October 1932, that a new method frees itself from rime and ice during the most est,reme should be tried in order to obtain a continuous record of winter conditions, is of more general int>erestsince this wind movement. The conventional type of cup ane- device is suitable for 8.11 localities subject to such condi- mometer was rep1ac.e.d by an instrument having a spe- tions. cially designed cap-wheel rotor equipped with a stationary The cha,racter of tlie winds prevailing on the stormy electric stove unit, connected &h t,he 110-volt D.C. summit of Mount Washington was well determined by gasoline-elect,ric unit of the Observatory. This new the observations beginning June 5, 1871, and maintained instrument, installed on the observatory building, 8 feet throughout the years for more than 17 years by the above the roof-ridge, recorded every mile of wind on a United States Signal Corps.
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