East Pacific Hurricane set to hit Gulf of Alaska

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Ashwin D

There has been a strong negative velocity potential(divergent irrotational part of the total wind field) in the North Pacific in the last one week -

http://www.cpc.ncep.noaa.gov/products/Global_Monsoons/Figures/curr.vpt.7day.figb.gif

and it looks like it has spawned off a East Pacific Hurricane.

http://www.opc.ncep.noaa.gov/P_sfc_full_ocean_color.png

The Low(967 hPA) is centered around 50 N and 140 W and NWS expects it to move into the Gulf Of Alasks.

The Northern Pacific region has had a strong negative OLR anomaly for the past one week.

https://www.esrl.noaa.gov/psd/map/images/olr/olr.anom.7day.gif
 

Ashwin D

You are right it is an extratropical cyclone but with hurricane like winds. When the warning was issued the speed was 64 knots same threshold as a hurricane.

Paul - if this post needs to be moved to another forum and not tropical please go ahead and do it. I did not see a category for extratropical cyclone
 
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