thunder antl a short shower of largc raiiltlrops ovor SOIIW parts of tho Hagr~e. Thtmtler was heard (at, least ten timcs) aid obwrvers at Voorburg, where there hut1 beon no rain. reported ver t i rd flashrs between 1864 and 1915 hr. Aft,er this the storm travelled to thr north-nortl -west antl died out abovc tho North St%.

Wo c aiiiiot confirrrl or disprove from the I1uti.h tq)pcr air soulitlings o u r ohswva- tions of the height of the rloud top, bu t even if i t should have boon 20,000 f t , teirq)ordtiirci was still not lower than about -26" C. A t none of the I8 Dutch woather sta.tioris has thui-der been reported. 111 this ~ a s o thP rliarging must have bron c;srised t;p other effwts (see e.9. tho theories of Sirnpsori ancl Wilson), and i t should he interesting to rollect moro da ta of these nnall storms. More t l e t d s of this storm will he w r i t to thti Thunrlerstorm Census Organization in due miirsv .

Leyden 1'. J . FETEHIS

Intense Thunderstorms at Evesham, I3 July 1949 .\ short but very scverc: t,huntlcrstorm struck J~:\.c~sharn OII bVctlncstlay, 1 3 July I N ! ) .

It only Iastecl S : O V ~ I I niinutrs, 3.03 to 3.10 p.m. BST, during wliicli time 0.35 iii. was iiic~~siiretl. but for one minute at, 3.07 p.m. I estirna,tc t.hat 0 20 ill. fell. Perhaps you c*oultl givo m e you^ cstimation wlien 1 quoto the following : There was a, sudden roar, ancl rain antl hail fcll with such illtensity tha.t visibility was rrtluvrti to I rss t.lian 30 yards. I hsvc: scarcely ever soen EL lower visibilit,y in the densest of fogs. Othrr ~ieople estiniat,c?d a visibility of only 10 yards, but whirhever was nearor c~orreut, all agreotl tha t they krad nowr semi anything approaching such a downpour bcforr.

and west t h e r ~ was 110 ~ , le t . ip i t , e t i (~~~. a m later in the afternoon, giving nrrtrly

an inch ant1 a half in 4 0 minutcs, but as the storm lrad by t,hrn spread in area i t apprars t,hat the ost,reme concent,ration of rain had tlecrrasrtl.

gvesharn, Woroestershire K. A. lh;i ,u

.trernely local, as a riiilo to the was tho storm tha t warhed Uirm

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