Here’s the main points:
- Rain will start on the coast Tuesday night, and it will start in the Puget Sound area early Wednesday morning
- Expect high rainfall rates, totaling 1-2 inches by the end of the day Wednesday
- The heaviest rain is likely Wednesday afternoon, and due to the heavy rain, localized street flooding is possible
- Winds will gust 20-40 mph from Wednesday morning through at least Saturday
- Power outages are possible due to this storm being early in the season
- Additional rain totals of 0.5-1.0 inches are likely on Thursday and Friday, along with a chance of thunderstorms on these days
- Storm totals of 1-4 inches are likely
Here is a graphic from NWS Seattle showing the impacts on Wednesday. (Click to enlarge).
For a more extended view, here is the forecast for Puyallup (including daily rain totals) from Wednesday to Saturday. This can be found on Weather Underground by searching Puyallup.
This adds up to 3.33 inches through Saturday. That’s a lot of rain! This total will probably fluctuate, but expecting 1-4 inches of rain is a good assumption to make.
You might be wondering if this rain will cause river flooding. For this storm, river flooding is not expected. This is because rivers are still at relatively low summer levels. This storm will increase the levels but will not cause flooding. This would be a different story if we had a storm like this in a few months.
However, due to the easterly windstorm on Sept. 7-8, there is lots of debris in area storm drains. Because of this, localized urban & street flooding is possible. Take precautions on area roadways, as standing water can be hazardous.
Be safe & be prepared for impacts from this first storm of the season!
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