The Hawaiian Islands are experiencing one of the wettest Marches on record, and some of that moisture is reaching the Pacific Northwest. Day after day for an extended period.
Just to wet your appetite, here are the precipitation totals for the last 72 h. Huge totals, exceeding 20 inches, over the southern portions of the Island of Hawaii. On location got to 31 inches. Substantial flooding and other damage have occurred.
This has been a Kona storm event with strong, moist southwesterly flow reaching the islands, instead of the normal northeast (from the NE) trades. This is associated with a deep, high anomalous low to the northwest of Hawaii, known as a Kona Low. The upper level map below from Saturday illustrates this feature (the purple colors indicate the highs/pressures are much lower than normal.
This type of pattern directs tropical moisture to the northwest, as illustrated by the water vapor pattern tomorrow morning (red indicates large amounts of water vapor in the column of air).
This pattern is going away.
Want to be impressed? Below is the total precipitation over the next ten days. You won't have to go to Hawaii.....Hawaiian moisture and showers will be coming to us.
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