Wednesday’s update on the approaching severe wind threat on Thursday, March 12th. As we discussed yesterday, a large cyclonic circulation over the North Atlantic had several mesoscale vortices, which organized into one intense core today. This low has now reached its peak and is moving towards western Europe. It will introduce a strong to locally severe windstorm across western Ireland and Northern Ireland (Donegal) tomorrow.

As of 06 UTC this morning, March 11th, the cyclone had a central pressure of 962 mbar. That is slightly lower than pressure reading yesterday afternoon. It is expected to continue east towards Scotland over the next 36 hours, reaching the west coast in the morning hours and passing the country during the afternoon. An associated surface cold front is already moving across western Europe.

Satellite imagery reveals an impressive structure of the organized core, a classic occlusion of the system near its peak.

Here is a close-up view of the core:

The system is now near its mature stage and is expected to continue east over the next 36 hours, it will be weakening along its track but will still bring severe winds into western Europe. Its center is expected to cross Scotland tomorrow afternoon.

Peak wind gusts by ICON-EU, ARPEGE and ECMWF models – a broad swath will spread towards Ireland and UK tonight and tomorrow (Thursday):

Stay alert for severe winds and high waves along the western Ireland and Northern Ireland coast through Thursday!

Status Orange – Wind warning for Donegal

Southwest winds veering west to northwest will reach mean wind speeds of 60 to 75km/h with gusts of 100 to 120km/h.
Due to a combination of waves, spring tides and surge, the possibility of coastal flooding is increased on Thursday.

Status Yellow – Wind warning for Cavan, Monaghan, Donegal, Dublin, Louth, Meath, Galway, Leitrim, Mayo, Sligo and Clare

Southwest winds veering west to northwest will reach mean wind speeds of 50 to 65km/h and gusts of 80 to 110km/h.

Status Orange – Gale Warning

1. Southwest winds veering northwesterly will reach gale force 8 to strong gale force 9 tonight and on Thursday on Irish coastal waters from Valentia to Rossan Point to Belfast Lough, occasionally reaching storm force 10 on Thursday morning from Loop Head to Rossan Point to Fair Head.
2. Southwest winds veering west will reach gale force 8 on Irish coastal waters on Thursday from Fair Head to Carnsore Point to Valentia.

See the previous discussions:

A deep low-pressure system brings gale-force winds across UK and Ireland on Thursday, followed by an Arctic outbreak into northern Europe on Friday

A former bombogenesis along southeast Canada is moving across the North Atlantic, brings more rain and flooding threat into parts of the UK and Ireland through this week

See also – an intense Arctic outbreak is also expected across southwest Canada and the northwest USA this week:

*intense* early spring Arctic outbreak into southwest Canada and northwest United States this week, Alaska into a significantly warmer period