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North Atlantic *update* – Impressive satellite presentation of twin cyclones

Here is a short morning update on the very dynamic pattern over the North Atlantic today; we have a decaying deep cyclone, passing over the UK and Ireland while an explosive cyclogenesis is underway further west – an exceptional rate of rapid intensification is seen, pressure drop was 46 mbar since yesterday morning! Both systems are creating a pretty impressive satellite presentation, we are facing two cyclones side by side – twins. The rapidly developing cyclone will result in extremely deep central pressure tonight, violent hurricane-force winds and monster 15-18 meter waves!

Here is the animation of wind gusts by ICON-EU model, with violent winds expected across the North Atlantic in the coming days. Additionally, we have made an animation of significant wave heights associated with this system:

Today’s 06 UTC surface analysis, Feb 13th, reveals the two cyclones over the North Atlantic. They were connected to each other with the surface front in between. The western system maintains the extremely rapid intensification with a central pressure already at 950 mbar, located northeast of the Newfoundland. It is expected to deepen for another 25 mbar until Thursday morning (06 UTC, Feb 14th), likely sliding below 935 mbar! The eastern cyclone over the UK and Ireland is gradually weakening, moving east. Below are the past 36 hours analysis data in 6-hour intervals.

Cyclone #1 – the western system over the Northwest Atlantic. We can see the pressure falls are even faster now, with an incredible 43 mbar change during the past 24 hours (00-00 UTC interval)!

  • 950 mbar at 06 UTC, Feb 13th
  • 962 mbar at 00 UTC, Feb 13th
  • 970 mbar at 18 UTC, Feb 12th
  • 986 mbar at 12 UTC, Feb 12th
  • 996 mbar at 06 UTC, Feb 12th
  • 1005 mbar at 00 UTC, Feb 12th
  • 1009 mbar at 18 UTC, Feb 11th

Cyclone #2 – the eastern system moving across the UK and Ireland. Its pressure is gradually rising as cyclone is weakening while moving east.

  • 982 mbar at 06 UTC, Feb 13th
  • 978 mbar at 00 UTC, Feb 13th
  • 976 mbar at 18 UTC, Feb 12th
  • 978 mbar at 12 UTC, Feb 12th
  • 985 mbar at 06 UTC, Feb 12th
  • 993 mbar at 00 UTC, Feb 12th
  • 998 mbar at 18 UTC, Feb 11th

Attached are satellite images in various channels – notice the textbook structure of the rapidly intensifying cyclone on the left, with well-defined dry conveyor belt (dry intrusion) wrapping into the core. While the system over western Europe looks like a ‘donut’ on water vapor imagery. the dry belt (dark band) almost completely closed off the cyclone’s core.

Close-up with of the western cylcone through the airmass satellite channel:

The future behavior of the system is more or less on track with the previous thinking, the cyclone over UK & Ireland will weaken today while the explosive development of the bomb cyclone will continue for another 12-18 hours, resulting in violent hurricane-force windstorm over the North Atlantic. See the primary forecast discussion:

Probably the most intense extra-tropical cyclone of the season will be seen across the North Atlantic on Thursday and Friday

See also – previous update on the explosive cyclogenesis across the Northwest Atlantic:

A new deep low-pressure system brings severe winds into England, Ireland, Wales and Bay of Biscay through Wednesday night, also some fresh snow across northern England and Scotland

The North Pacific satellite presentation of two deep cyclone, also creating a tandem of twins:

Spectacular tandem of twins – two cyclones over the North Pacific today, Feb 12th