Heavy rainfall, central S England, Friday 25 April

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Heavy rainfall, central S England, Friday 25 April

Postby Stephen Burt » 2014 Apr 26, 21:25

A very wet start to Friday morning here. Rain set in just before 0600 UTC, becoming increasingly heavy from 0700, then torrential around 0730 – peak intensity from three tipping bucket gauges 94 mm/h, 105 mm/h and 113 mm/h at 0729z. The rate remained at or above 60 mm/h for 175 seconds in all. The hourly fall 07-08h was 13.1 mm - the highest hourly fall for 3 years, and well above any hourly fall previously recorded in April on my records back to 1984 (the previous highest being 'only' 8.2 mm in 1998).

The total fall 0600-1800 was 27.1 mm. A pity it was split across two raindays, because otherwise it would have been the third-wettest April day in the last 100 years - the only higher 09-09h April falls on local daily records back to 1910 being 33.2 mm on 23 April 1971 and 29.4 mm on 29 April 1991.

What was a dry month until a week ago is now upwards of 150% of normal.

Stratfield Mortimer, Berkshire - central southern England
51.4°N, 1.0°W, 60 m AMSL, station grade A - AAAA47R
Records commenced here 1987 - local records available back to 1862
The Weather Observer's Handbook: www.measuringtheweather.com
Stephen Burt
Posts: 247
Joined: 2011 Dec 02, 19:36
Location: Stratfield Mortimer, Berkshire; a well-exposed rural site, 10 km SW of Reading

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