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7 DAY FORECAST
HOURLY
59
Rain
Thursday-
Rain
61
47
100%
61
47
Rain
Precipitation100%
Wind12mph SSW
Humidity94%
UVLow
Friday-
AM Light Rain
49
40
80%
49
40
AM Light Rain
Precipitation80%
Wind8mph NNE
Humidity79%
UVLow
Saturday-
Sunny
51
36
10%
51
36
Sunny
Precipitation10%
Wind11mph N
Humidity68%
UVLow
Sunday-
Sunny
55
38
0%
55
38
Sunny
Precipitation0%
Wind7mph NNE
Humidity62%
UVLow
Monday-
PM Showers
55
44
40%
55
44
PM Showers
Precipitation40%
Wind6mph SE
Humidity64%
UVLow
Tuesday-
Mostly Cloudy
55
46
20%
55
46
Mostly Cloudy
Precipitation20%
Wind5mph SSE
Humidity79%
UVLow
Wednesday-
Showers
54
48
40%
54
48
Showers
Precipitation40%
Wind7mph SE
Humidity78%
UVLow
Thursday-
Showers
53
46
40%
53
46
Showers
Precipitation40%
Wind9mph SSE
Humidity85%
UVLow
RIGHT NOW
Precipitation90%
Wind12mph SSW
Humidity97%
UVLow
Visibility3 miles
58
90%
58
90%
58
100%
56
100%
55
100%
54
100%
53
100%
52
100%
51
100%
51
100%
50
100%
50
100%
49
100%
49
100%
49
90%
48
90%
48
80%
48
70%
48
60%
48
50%
48
20%
49
20%
49
20%
49
10%
49
10%
49
10%
48
0%
46
0%
45
10%
44
10%
44
10%
43
10%
43
10%
43
10%
43
10%
42
10%

Latest Weathercast

WEATHERCAST

Interactive Radar

Radar

Latest Forecast


Updated Thursday at 11:54 a.m.

Welcome to the wettest day since last January. Rainfall rates over the Olympics and northern Cascades have exceeded 0.50" per hour as the "Pineapple Express" of mild, Pacific moisture streams overhead. This tropical-like deluge will result in an unusual amount of rain (4-6 inches) in the northern Cascades, the runoff from which could cause minor to moderate flooding along the Nooksack and Skagit River. Burn scars left over from summer wildfires in the Cascades will also be prone to mudslides and debris flows. Flood Watches have been posted across 9 counties, including Snohomish and King County. The Snohomish and Snoqualmie River will rise as well but likely stay just below flood stage.

The rain coverage and intensity is increasing across Puget Sound with the heaviest rain of the day for Seattle falling during rush hour (4-6 PM). Low visibility and urban street flooding could hinder the drive home, especially considering a period of strong winds (gusting over 40 mph) will further strip the leaves off the trees to clog the drains.

Eventually, the fire hose of moisture shuts off early Friday morning. Sunshine soon returns tomorrow afternoon, a good omen for the holiday weekend ahead. Clear conditions combine with the ground moisture leftover from this atmospheric river event to form fog Saturday and Sunday morning.

Happy to forecast a dry Halloween this year, but the extra layer will feel good for trick-or-treating as temperatures dip into the 40's after sunset Sunday night.

Meteorologist Kristin Clark
The KOMO4 Forecast Team

SUNRISE
07:47:59 am
SUNSET
05:57:21 pm

Today's Record Temperatures

Record High70
F
Record Low32
F