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News / Clark County News

Weather Eye: Halloween weather won’t bring favors for trick-or-treaters

By Partrick Timm
Published: October 29, 2015, 6:05am

There will be no treats this Halloween in the weather as heavy rains are forecast. We will see a prelude to that Friday with periods of moderate to maybe heavy rain especially at the coast and in the Cascades.

There’ll be a brief lull Friday night or early Saturday before the deluge returns. It is good thing rivers are low, and the ground is still thirsty. Some will soak into the ground before excessive runoff, but I’m sure there will be some minor flooding in Western Washington. I give my best estimate of timing, but that and the location of the heavy rain belt may change.

With leaves falling to the ground each day some street flooding will occur. Maybe clean the leaves away from your local storm drains. Attention to the gutters and downspouts is in order if not done already.

Whenever we get a set up like this, the heavy rain belt tends to shift back and forth, north and south and often stalls. This atmospheric river can produce excessive rains, but is difficult to forecast this far out with great accuracy who gets the most rainfall. That’s my disclaimer.

Forecasters say that the rainy pattern on Halloween looks much like Halloween 1994, when we had 2 to 4 inches of rain in the lowlands. The bottom line is to expect wet and maybe blustery weather Friday through Sunday.

Forecast models show this boundary zone to shift south and east, placing us in a cooler, showery air mass Sunday. That’s good news for the mountains, and perhaps as low as the Cascade passes, as the rain will turn to snow. Maybe we get a couple of mild dry days next week.

The storm that brought rain Wednesday weakened with amounts through 5 p.m. generally less than a quarter-inch. However, with the rain Friday and Saturday, we no doubt will go from way below-normal rainfall for the month to above average. How about that?

We’ll chat Sunday after getting an extra hour of sleep and tally the rainfall.


Patrick Timm is a local weather specialist. His column appears Tuesdays, Thursdays and Sundays. Reach him at http://patricktimm.com.

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