Richard Griffith wrote:I heard on the Radio 4 forecast early this morning that 48mm of rain fell at Kenley in Surrey during yesterdays storms.Does any know what time and over what time period this fell? I had thunder at my location around midday and further thunder during the evening but only recorded 6.3mm up to 09h this morning.
Regards
Based on the SYNOP data (listed below - courtesy of OgiMet site), the sequence of events is as follows:-
1200Z .. No PPN; OAT = 22.0degC
1300Z .. Intermittent rain - violent: visibility 1200M; OAT = 19.0degC
1400Z .. Rain, not freezing, heavy: visibility 10 km; OAT = 15.4degC
1500Z .. Rain, not freezing, moderate: visibility 12 km; OAT = 15.6degC
1600Z .. Rain, not freezing, slight: 16 km; OAT = 17.3degC
1700Z .. Rain (non-freezing) in past hour [but not at observation]: 25 km; OAT = 20.2degC
1800Z .. No PPN: 40 km [total rain period 06-18Z = 48 mm, but as no rain accumulation was recorded at 12Z, then we can infer that the 48 mm was recorded between 12 and 18Z.]; OAT = 19.5degC, Tmax = 23.0degC, possibly just before the intense rain set in.
Moreover, from the hourly observations (the Met Office will have 10 minute data [or better] from this AWS), I'd suggest that the bulk of this PPN fell from a time a short time before 13Z to just after 14Z.
I've had a look at the archive radar on MeteoX.com but the resolution available there isn't good enough to fine-tune the above.
Martin.
201606071800 AAXX 07184 03781 15982 /0902 10195 20159 30024 40225 56002 60482
333 10230 553// 21088 82/61=
201606071700 AAXX 07174 03781 47975 /0602 10202 20161 30023 40223 56011 723//
333 553// 21448 81/65=
201606071600 AAXX 07164 03781 47866 /0504 10173 20165 30022 40225 58010 761//
333 553// 20521 87/57=
201606071500 AAXX 07154 03781 47762 /0401 10156 20152 30026 40230 58001 762//
333 553// 20139 87/56=
201606071400 AAXX 07144 03781 47560 /2306 10154 20146 30033 40237 53005 763//
333 553// 20068 81/23 86/50 90710 91126=
201606071300 AAXX 07134 03781 47512 /0805 10190 20162 30031 40232 52004 784//
333 553// 20453 85/26 84/36=
201606071200 AAXX 07124 03781 15677 /0105 10220 20155 30027 40226 51001 60001
333 553// 22078 84/33