Show 1 Tornadoes and Cyclones i Storms as u Defined Denned by the U. U S. S V Weather cather Bureau Weather men mn define a n tornado as a 11 violent nt windstorm with rain or hall hail thunder and lightning In which the air passes whirl with great velocity I t around a central core while the whole storm torm travels across the country in a d f narrow path at high speed The thunder thun thun- der ler and the whirling motion h have he e en n rise to two theories of the derivation tion of ot the word as to whether it is derived from the Spanish torna a z a thunderstorm or from the Latin torn are to turn A cyclone in the dt definition of ot the weather feather bureau Is not necessarily a of great rent velocity but rath- rath 4 jrr r r n a widespread storm torm tor that moves with no Q rent spend speed pe d. d uR It- width puny may cover er fer several 1 states stas J This cyclone or area prea et f low Jaw s J Js s low on j the wee be r ma map map es- es esto to tornadoes Map Many Sea e j l hover develop 8 tornado but a f tornado never develops 1 the to cyclone almost Invariably the t tornadoes 1 oc- oc fur ir cur In the southeast quarter of thelow the thelow t low area Brea r About 1 O cyclones cyclone pass j. j the d United States each Mch year enrI I muting moving in a ft general way war from west to I east nt They are of ot great reat benefit because beu be- be cau cause u e they induce Dlo C movement nt of ot surface from irom the south and ancl southeast t and tile file rainfall that tha makes the great T nt interior Interior In In- valleys ys a rich h 1 agricultural r region 1 if dt dependent upon these southerly hearing winds Practically ill ail of tua cyclones l of ot the thew w season give rise at some time or tr thunderstorms or hall hail or vio- vio lent AlnIs These winds ma may be vie vie- l t nt lt enough h to cause US destruction but unless they have ha the whirling column of If air they are not Mt tornado torna W-tt W In Iii the f Enn Jt t it is not nl n always easy to distinguish distin distin- Jui wish h the funnel shaped cloud but the theIn In lay of nf the d debris after a storm will tell whether her there has hns been a twist twisting twist J ing In motion Tornadoes s almost invariably in move mo In direction and I m 10 easterly generally from southwest s st to northeast The average av av- rage rn length of the path IlIth of nf destruction l is 1 about 25 miles and this path may not be continuous If the funnel cloud is t not in contact with the earth arth during Its whole course Sometimes Sometime it rises and I goes for n a considerable on distance before beCore de descending lI again ain |