Extreme Precipitation and Flooding in Whatcom County


 Extreme flooding forced by extraordinary precipitation has flooded the town of Sumas and other locales in Whatcom County.

Landslides closed I5 and some other roads, and sewage overflows are threatening some water supplies in the area.

The pictures are stunning.

Downtown Sumas was flooded this morning.

The nearby town of Everson is flooded.

And landslides closed I5 near Bellingham:

The Nooksack River achieved its all-time record river stage.

The cause of these terrible conditions is very wet autumn followed by extremely heavy rainfall over the weekend.  Let me show you.

Here are the 72 hr totals ending at 6 PM today.  A number of locations reported 8-10 inches…unbelievable… with 8.94 inches as Sumas Mountain and 9.88 inches near the international border.  Orcas Island, which is closer to the Olympic Rainshadow, got around 5 inches.

But what made this even so deadly is that most of…

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