Update from Met Eireann on Storm Ciara - Expect strong winds, significant rainfall and flooding


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issued 15:00, Wednesday, 5th February, 2020, by Matthew Martin, Meteorologist, Forecast Division, Evelyn Cusack, Head of Forecasting, and Eoin Sherlock, Head of Flood Forecast Division of Met Eireann

Unsettled weather is expected to develop across Ireland and Northwest Europe this weekend. The change will occur as very cold air sweeps out of Canada into the North Atlantic creating a sharp temperature contrast in the atmosphere over the ocean. This temperature contrast will result in the intensification of the jet stream over the North Atlantic, which will drive vigorous areas of low pressure towards Ireland.

Continues below

The animation below shows the evolution of the jet stream over the coming days.

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After a period of rather quiet weather, the change to unsettled mobile conditions will occur during Friday (7th Feb) as wet and windy weather moves in from the Atlantic. A further spell of heavy rain is expected on Saturday (8th Feb) and this will be accompanied by strong and gusty winds with a possibility of Status Yellow warnings.

Weather conditions are expected to deteriorate further on Sunday (9th Feb) as Storm Ciara (named by the UK Met Office on Wednesday 5th February) tracks to the north of Ireland.

Storm Ciara is forecast to be a vigorous Atlantic storm system with an expansive wind-field. Numerical Weather Prediction Models project the centre of the storm to track close to northern Scotland with a minimum central pressure of around 940hPa at lunchtime Sunday (see Figure Below).

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There is a growing consensus that Sunday will be an extremely windy day across Ireland and the UK with widespread heavy rain, squally showers and with gales or storm force winds around our coasts.

 

Storm Ciara is the third named storm of the season. The naming convention now also includes the Dutch meteorological service, KNMI as well as our existing partner UKMO. Storms are named to aid the communication of approaching severe weather, helping the public to be better placed to keep themselves, their property and businesses safe.

Next week, conditions will remain very disturbed across Ireland and the UK. It will remain very windy and turn much colder with the chance of wintry showers and ice in some parts.

Flooding issues

The country will enter a period of Spring Tides this weekend. This will coincide with high seas, which are likely to affect coastal areas at first on Saturday but will continue into Sunday and the early days of next week. The combination of high Spring Tides and high seas as well as extremely windy or stormy conditions later in the weekend and early next week will result in an elevated risk of coastal flooding especially along western and southern coasts.

The unsettled weather is likely to produce significant rainfall totals over the weekend. This will result in an increase in river levels and may cause some localised flooding.



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