Severe Weather - Rainfall Between 23-25th

[philglossop]

Flooding was reported in Mevagissey yesterday, but all the other main towns and villages in Cornwall escaped.

There was flooding however across Plymouth in the following spots- Crownhill Road, Union St and the Western Approach junction, Looseleigh Lane, Southway Drive, Clifford Road and the Dunnet Drive junction, Peters Park Lane, Hooe Road, Hyde Park Road, Woodstock Gardens, Melrose Avenue and Wolseley Road.

All those locations are in dips or at the bottom of hills. Plymouth reported 32mm of rain yesterday, here we got to 36.7mm making it the wettest day of the year so far.

[Downburst]

I've never experienced anything like last night before in Dublin and the North East. I had to drive 60 miles north out of Dublin to get home, left office late. At 50 mph my front wheels were gliding as there was a good 3 cm of water on the road from the constant heavy rain, so max was 40 mph, every so often hit a patch of standing water or worse an area where one lane was submerged. Cars in the hard shoulder obviously flooded etc. Some clowns speeding, all in all a terrible and scary experience. City people don't get the fear until it's too late.

This morning I saw a river in flood that floods perhaps once or twice a year but this was massive, well over the flood plain.

Now average monthly for Dublin is 67mm October, we beat that in 24 hours, at 82.2 in 24 hours. Currently totaling 151 mm.

At least the roads are clean as a whistle.

Unfortunate news is that a policeman was taken away in the Liffey up in the mountains outside Dublin whilst off duty he went out to prevent cars crossing a bridge. Body found this morning. These guys do put their lives on the line, a brave man.

[Nick F]

Convective / Storm forecast - Issued 25/10/2011 11:00

Forecast Summary Map

Click for full size

Valid: 25/10/2011 06:00 - 26/10/2011 06:00

Headline: ... THERE IS A RISK OF THUNDERSTORMS FORECAST...

Synopsis

Large upper low and colocated surface low over western Britain drives a cyclonic SW flow across the British Isles, by 12z ... cold front lies across NE Scotland with showery troughs moving NE across England and Wales.

... SW ENGLAND, SE ENGLAND, E ANGLIA, LINCS and S WALES ...

Upper low across the W/SW will spread increasingly cold upper air/steep lapse rates in from the SW across the Sern half of England and Wales today. Scattered heavy showers and thunderstorms will therefore develop across southern England and south Wales by lunch-time and continuing through the afternoon into the overnight period. Shortwave trough(s) moving NE will enhance convective activity and thunderstorm development, fairly strong upper flow towards eastern England and 30-40 knots of DL shear should be sufficient for some loosely organised convection capable of producing some strong wind gusts, hail and CG lightning, particularly across coastal central S/SE England this afternoon and through tonight. However, without a more robust indication of instability and stronger wind shear in the lowest km, no severe weather is anticipated. Heavy showers/t-storms across SE England will transfer north across E Anglia and other areas of E England by dawn.

Issued by: Nick F - Forecaster for Netweather