RAINFALL IN HERTFORDSHIRE IN 1901. 
161 
The rainfall is thus seen to have been much the greatest in the 
extreme west of the county (Thame district), gradually less towards 
the centre, less still as the east is approached and in the north, 
and greater again in the extreme east, though much less there 
than in the western and west-central area. The rainfall exceeded 
one inch in 24 hours on six occasions during the year, and there 
are 56 records of such falls in the aggregate at all stations. These 
were most frequent in proportion to the number of stations in the 
Thame district and least frequent in the Ouse district, and they 
were about equal in the districts of the Colne and the Lea. On 
May 7 there was a heavy fall in the Colne district culminating 
at St. Albans, where it reached about an inch at the three stations. 
On June 30 nearly an inch and a half fell at Moor Park. On 
July 12 occurred the great Watford storm and flood, when more 
rain fell in an hour over part of the town than has ever before 
been recorded for that period at any rainfall-station in Hertfordshire, 
though very little fell at Bushey, and none whatever in the extreme 
east and south-east of the county: in the lower part of the Bulbourne, 
the Glade, and parts of the Lower Colne and Mimram districts the 
fall exceeded an inch. On July 25 and 26 there was heavy rain 
over the Ouse, the Lea, the Thame, and the Yer districts, varying 
from an inch to over an inch and a half on one or other day. And 
lastly on December 12 the fall was at least an inch at nearly every 
station in the county, the Bulbourne district receiving the largest 
amount and the Gade but little less. 
The total yearly fall ranged from 17*53 inches at the Hertford 
Sewage Works to 25*99 inches at Pendley Manor, Tring; and the 
total monthly fall from 0*36 inch at the Colne Yalley WaterWorks, 
Watford, in November, to 4*63 inches at Bosebank, Berkhamsted, 
and Bose Cottage, Berkhamsted, in December. The greatest fall in 
any one day was 1*89 inch at the London Orphan Asylum, Watford 
(1*98 inch at 107, St. Albans Boad, Watford, a supplementary 
station), on the 12th of July. 
Distribution of the Rainfall in each Month. —The nomenclature 
used in the following account of the chief falls of rain is the same 
as in my previous reports, falls of at least £ inch being styled 
considerable, f inch very considerable, 1 inch great, If inch very 
great, If inch heavy, and If inch very heavy. As in the previous 
year, there was no excessive fall (2 inches). Only the thirty-five 
complete returns of the daily rainfall are thus analysed, except 
that falls of at least one inch which were the heaviest in the month 
are given for all stations. The wettest days in each month are 
given for all the forty-five stations. 
January. —A month of very small rainfall, but with rain or 
snow on about the average number of days. Snow fell only up 
to the 8th and after the 26th, and it was very small in amount. 
There was no considerable fall either as rain or snow. The 8th 
was the wettest day at 3 stations, the 9th at 5, the 19th at 18, 
the 27th at 13, and the 28th at 2. 
VOL. xi .—part v. 
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