In the Bohai Sea, storm surges caused by
extratropical cyclones are more common compared with those induced by tropical cyclones [4].
We located the
extratropical cyclone pertaining to this event on the surface isobaric chart nearest in time to the six-hourly precipitation maximum, defining the cyclone as the low-pressure center that was closest to the event station.
Together with AIR's
Extratropical Cyclone Model for Europe and European flood models, this new model now allows for a comprehensive assessment of atmospheric risk in this region.
The Meteorological Agency said the season's 21st typhoon became an
extratropical cyclone near Russia's Far East, and was moving away from the Japanese archipelago.
Nuri became extratropical and deepened to about 924 hPa, which is the strongest North Pacific
extratropical cyclone on record.
An
extratropical cyclone rapidly developed and swept over northwest Florida during the early hours of March 13.
The season's 10th typhoon which hit Hyogo Prefecture in western Japan in the morning is expected to move to the northern Tohoku region on Saturday night and reach eastern Hokkaido early Sunday before turning into an
extratropical cyclone, the agency said.
The tropical depression is expected to further weaken into an
extratropical cyclone by Friday night.