On October 13, a tropical disturbance became well enough organized to be considered a tropical depression well east-southeast of
Hawai'i. The system stairstepped to the west-northwest over the next several days, becoming a tropical storm and eventually
a hurricane by October 17. Ana experienced bouts of vertical wind shear over much of its existence, keeping the system from
becoming a major hurricane. Ana crossed the island chain within the Papahanaumokuakea Marine National Monument as it was
weakening back into a tropical storm as it took a more northerly heading. After recurving through and north of Hawai'i, Ana
strengthened into a hurricane once more on October 25 and 26. Later on October 26, Ana became entangled within the polar
front and evolved into an extratropical cyclone, which strengthened as it approached southwestern Canada.
The graphics below show the storm total rainfall for Ana, which used information from the National Weather
Service River Forecast Centers, Forecast Offices, and CoCoRAHS.
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