Brief high wind occurred on Lopez Island.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS SEW wrote it up.
Brief high wind occurred on Lopez Island.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Seattle, WA wrote its last area forecast discussion before the first event at Nov 5, 9:30 AM PST, 21 minutes earlier.
Area Forecast Discussion
National Weather Service Seattle WA
930 AM PST Sun Nov 5 2017
.SYNOPSIS...Rain and snow will start to taper off this afternoon.
The trough will shift south and east tonight with an upper level
ridge building offshore. The upper level ridge will move over
Western Washington on Monday then shift east Monday night. The next
system to reach the area will stall offshore on Tuesday before
moving inland on Wednesday.
&&
.SHORT TERM...The 1003 mb surface low if finally starting to shift
inland over Grays Harbor county and is in the process slowly filling
to around 1007 mb per MSAS analysis. Warm advection overnight
reached much of the Puget Sound area as the heaviest precipitation
was falling. Even with northeast surface winds over Hood Canal,
spots that would normally switch over to snow stayed mostly rain
even as of 9 am. However, area temperatures are near or just above
freezing at spots like Seabeck and snow is likely falling in spots
with some elevation. An inch or wet snow is still possible around
the Hood Canal/Kitsap but will not be as much as was expected.
Amounts did reach several inches inland from the water along the
eastern Strait and also around parts of Admiralty Inlet. Radar seems
to show upslope precipitation tapering off over those areas. Most
lowland snow is snow falling on the east side of Puget Sound mainly
east of the I-5 corridor or at spots above a few hundred feet. Some
spotty accumulations around an inch or so have fallen outside of the
I-405 loop and east lowlands. From around Tacoma south it has stayed
mostly rain, closer to the low center and slightly warmer air.
Additional wet snow will probably continue around Puget Sound into
the early afternoon but nothing more than some light slushy grass
accumulation is expected. Will plan to let the advisory expire at 11
AM for the remaining lowlands but keep it going for the Cascades
from Snohomish county south through the afternoon. Snoqualmie pass
surprised with at least 8 inches overnight and still snowing with
temperatures in the 20s. Over 6 inches have fallen in other parts of
the Cascades including White Pass. With the low still over southwest
Washington, snow should continue in the Cascades but generally
decrease through the day. Another 4 to 7 inches could fall.
Models take the upper trough southeast of the area tonight with the
air mass rapidly drying out. This will allow for some chilly
temperatures Monday morning with low lying cold pocket locations
reaching the 20s. Expect some icy spots possible on some roadways,
even on the outskirts of the main I-5 metro corridor which could dip
to near freezing. Dry weather continues into Tuesday with cool
morning temperatures. Mercer
.LONG TERM...Previous discussion...Run to run consistency in the
model solutions for the mid week front has not been very good the
last few runs. The models are waffling on the timing of the system.
00z solutions are a little faster than the previous couple of runs
and more like the model runs from a couple of days ago. There is
consistency in the idea that the front will become negatively tilted
and split a little before it arrives in Western Washington and that
the main portion of the front will move inland south of the area.
Current forecast has a chance of rain for the interior on Wednesday
with rain likely on the Coast with what is left of the front moving
inland Wednesday night. Will stay with this idea for the morning
package. More model inconsistency Thursday into the weekend with the
general idea of the system for later Thursday into Friday also
moving inland south of the area and the system for Saturday slowing
down. Have lowered the pops for Friday night and Saturday back to
chance and kept the pops in the likely category for Thursday and
Friday. Felton
&&
.AVIATION...A cold upper trough over Western Washington this
morning will gradually move east today, exiting this evening. An
upper ridge will build in from the northwest on Monday. Light SW
flow aloft today, becoming north on Monday. The air mass is moist
and stable, with drying expected tonight and Monday. From BLI-
CLM-UIL, cigs are currently lifting and are above 3,000 ft MSL
due to drying but gusty NE wind. From PAE on south through the
Puget Sound region, prevailing precip and low clouds will continue
until drier air starts arriving in the 21z-02z time frame
(arriving first further north). Regarding snow, if anything it
looks like the air mass will cool a little more through this
afternoon, so where snow is currently occurring, it will likely
remain snow until precip ends.
KSEA...Looks like precip will continue off-and-on until about
22z-23z (2-3 pm), then taper off and end soon thereafter. Air mass
should actually cool some through mid-afternoon, so the precip
type will be more snow than rain. Air temperatures will hold
steady near 35F (2C) until precip ends. The north wind will
finally bring drier air and lifting cigs around the same time that
precip ends. Cigs should quickly rise into the 035-050 range
around 23z-24z. North wind may ease below 5 knots around 03z-05z
this evening, with light and variable surface wind overnight.
&&
.MARINE...A 1006 mb low over Southwest Washington will fill and
move eastward this afternoon. The BLI-YWL pressure gradient
recently peaked near -12 mb. This gradient and wind obs gusting
near gale force (including Trial Island) prompted the issuance of
Gale Warnings for the Northern Inland Waters and C/E Strait for
the next few hours. Wind should ease this afternoon. Small craft
advisory northerly winds will continue for the remainder of the
waters into this afternoon, but wind and seas will be easing
late this afternoon and tonight. High pressure will build over
the region late Sunday through Monday.
A frontal system will approach the region slowly from the west
Tuesday and Wednesday. This feature will bring small craft
advisory southeast winds to much of the forecast area, with gales
possible over the outer coastal waters Tuesday and Tuesday night.
The system will weaken as it moves inland Thursday. Haner
&&
.HYDROLOGY...
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...Winter Weather Advisory until 4 PM PST this afternoon for
Cascades of Pierce and Lewis Counties-Cascades of Snohomish
and King Counties.
Winter Weather Advisory until 11 AM PST this morning for
Admiralty Inlet Area-Bremerton and Vicinity-Eastern Strait
of Juan de Fuca-Hood Canal Area.
PZ...Small Craft Advisory until 9 PM PST this evening for Coastal
Waters From Cape Flattery To James Island 10 To 60 Nm-
Coastal Waters From Cape Flattery To James Island Out 10 Nm-
Coastal Waters From James Island To Point Grenville 10 To
60 Nm-Coastal Waters From James Island To Point Grenville
Out 10 Nm-Coastal Waters From Point Grenville To Cape
Shoalwater 10 To 60 Nm-Coastal Waters From Point Grenville
To Cape Shoalwater Out 10 Nm.
Gale Warning until 3 PM PST this afternoon for Central U.S.
Waters Strait Of Juan De Fuca-East Entrance U.S. Waters
Strait Of Juan De Fuca-Northern Inland Waters Including The
San Juan Islands.
Small Craft Advisory until 3 PM PST this afternoon for West
Entrance U.S. Waters Strait Of Juan De Fuca.
Small Craft Advisory until 6 PM PST this evening for Admiralty
Inlet-Puget Sound and Hood Canal.
&&
www.weather.gov/seattle
You can see an illustrated version of this discussion at
www.wrh.noaa.gov/sew/gafd/latest_webafd.htmlPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SEATTLE WA
852 AM PST SUN NOV 05 2017
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0851 AM SNOW 3 WSW PORT TOWNSEND 48.10N 122.84W
11/05/2017 M1.4 INCH Jefferson WA TRAINED SPOTTER
&&
33The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
Lopez Island had sustained wind of 41 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Washington in 2017Every state in 2017This day in weather historyWarnings in Washington, November 2017
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 723721.