Valid: Sunday 23rd September 17:00 – Wednesday 26th September 2012

Issued For: Heavy Rain, Possible Flooding, Strong Winds

Highlights:

  • Low Pressure forming from Ex Hurricane Nadines energy
  • Potential to bring high rainfall totals in excess of 60mm
  • Strong winds along coastal areas

Forecast Detail
Through the course of the weekend ex hurricane Nadine which is currently situated to the South of the Azores will begin to generate a secondary area of Low Pressure out of the energy already present, this area of Low Pressure will then begin to track towards the United Kingdom reaching Southern England through the later part of Sunday evening.  Some areas could see in excess of 60mm which would almost certainly lead to flooding problems. Strong winds are also likely to be a factor with gusts of up to 50mph, particularly along coastal areas, again the strength of the winds will depend on the exact tracking and intensity.

The system will continue to track Northwards through Monday and overnight into Tuesday bringing heavier rain to areas further North too, the intensity is expected to be weaker by this point which is why an advisory is considered enough.

The low pressure system will then continue to travel around the United Kingdom until Wednesday bringing further heavy showers or longer periods of rain to some areas which is why the warning covers such a long period.

Orange Warning Zone – Heavy persistent rainfall through Sunday and continuing into Monday could bring rainfall totals of up to 60mm, locally 70 or 80mm could be possible and this is expected to lead to some localised flooding and dangerous driving conditions. Winds gusting to 50mph along coastal areas could present a further threat of disruption.

Yellow Advisory Zone – Heavy rain through Sunday and continuing into Monday could bring rainfall totals of 30-40mm which may lead to some localised flooding problems and dangerous driving conditions. Winds gusting to 50mph along coastal regions could present a further threat of disruption.

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