Here is an updated discussion about the twins – two cyclones ongoing across the North Pacific since last night. The eastern system over the Gulf of Alaska has now dissipated while the western cyclone has become the perfect storm, with a textbook cyclonic structure! At the same time, another tandem of twins was ongoing over the North Atlantic with an explosive cyclogenesis over the Northwest Atlantic.

Feb 13th 06 UTC analysis revealed the cyclone is over the Aleutian Islands (Alaska), having the central pressure of 958 mbar. That is 24 mbar pressure drop through the past 24 hours, meaning the system has gone through rapid intensification, defined as the ‘bomb cyclone’.

Below is the past 36 hours analysis in 6-hour intervals, revealing how fast the system was deepening. We can see an intensification flattened as cyclone has reached its mature stage and is now expanding in size.

  • 958 mbar at 06 UTC, Feb 13th
  • 957 mbar at 00 UTC, Feb 13th
  • 962 mbar at 18 UTC, Feb 12th
  • 970 mbar at 12 UTC, Feb 12th
  • 982 mbar at 06 UTC, Feb 12th
  • 990 mbar at 00 UTC, Feb 12th
  • 992 mbar at 18 UTC, Feb 11th

The satellite presentation is beyond exceptional! So perfect shape and cyclonic structure, the textbook warm conveyor belt wrapping into the core.

Some more impressive satellite in various channel scans:

Here is last night’s satellite view of the twins, an impressive tandem of two deep cyclones ongoing at the same time:

The system should remain impressive to watch over the satellites today, while it continues gradually weakening. It will remain very large until the weekend and continue brushing the Aleutian Islands for another 36-48 hours.

See also the previous satellite presentation of the twins last night:

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


And also some spectacular imagery of another bomb cyclone developing in the North Atlantic:

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


Explosive cyclogenesis underway across the Northwest Atlantic, while the system is creating tandem of twins – it is connected to the cyclone nearing the UK and Ireland