A ridge of high pressure overheard brought another weak of unseasonably warm temperatures throughout Western Washington.
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.
A ridge of high pressure overheard brought another weak of unseasonably warm temperatures throughout Western Washington.
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 Jun 7, 8:05 AM PST, 4 hours 55 minutes earlier.
Area Forecast Discussion
National Weather Service Seattle WA
905 AM PDT Wed Jun 7 2023
.SYNOPSIS...Upper level ridging will bring another day of warm
temperatures and elevated fire weather conditions. Onshore flow
brings cooler conditions on Thursday. Trough influence returns by
the end of the week, spreading some moisture back into the area and
increasing rain chances to at least the mountains and into the Puget
Sound Lowlands. Warm and dry weather then looks to return next week.
&&
.SHORT TERM /TODAY THROUGH FRIDAY/...A ridge of high pressure
overhead will bring another day of unseasonably warm temperatures to
W WA today, with most interior locations seeing the warmest high
temps of the week. Much of the area will see highs in the 80s, with
the Seattle Metro area and SW interior /including OLM and Chehalis/
getting close to 90. Along the coast, however, the impacts of the
transition to onshore flow are already being felt, with highs there
expected to be a couple of degrees cooler than yesterday...generally
in the lower to mid 70s. To briefly touch on Fire Weather, RH values
will actually nudge upward when compared to yesterday. While still
remaining dry over much of the area, min RH values are not expected
to sink so low as to trigger Red Flag concerns. For additional
details, refer to the Fire Weather section below.
A return to onshore flow will boost RH values even further, as well
as initiating some cooling over W WA starting on Thursday but
definitely being felt more on Friday as highs each of those days go
from 60s along the coast and 70s in the interior Thursday and
widespread 60s to around 70 on Friday. Further aiding in that
cooldown will be an upper level trough over much of the west
coast...including an upper level low crossing through south-central
CA. This feature will actually cycle in some moisture into
WA...however the primary focus of this moisture will be on the east
side of the state. Current deterministic and ensemble models in
agreement that while some moisture will spill over into portions of
W WA...making it as far west as the east Puget Sound lowlands...both
CAPE and stability indices remain low enough to nix any notion of
thunderstorm development at this time. Of course, will continue to
evaluate as 12Z data comes in.
All in all, inherited forecast is on track and see no reason for any
morning updates at this time. 18
.LONG TERM /SATURDAY THROUGH TUESDAY/...From Previous
Discussion...An upper level low will spin to our south this weekend
and into central/southern CA. Across western WA, onshore flow will
prevail for morning clouds and afternoon sun. Temperatures will
track above normal in the interior with 70s to lower 80s both days.
The coast will be in the 60s and 70s. High pressure nudges in on
Monday and temperatures will climb a few more degrees with 80s in
the interior again. High pressure then retrogrades back offshore by
Tuesday and ensemble members favor another dry stretch of weather. 33
&&
.AVIATION...Light south-southeasterly flow aloft with ridging over
the interior Rockies and an upper low over the Southwest. VFR high
clouds will likely spread over W WA at times through today with the
upper low across portions of CA/NV. Stratus continues to move
northward along the coast this morning, with times of IFR for the
immediate coastline into the afternoon. Mainly VFR into tonight with
stratus spreading inland towards the Southwest Interior and
potentially near KOLM into Thursday morning. Light west-northwest
winds this morning, increasing a bit this afternoon into this
evening.
.KSEA...VFR cigs through tonight with high clouds at times. Light
west-northwest through much of today, with winds transitioning more
southwest later this evening and tonight (mainly after 06z). JD
&&
.MARINE...High pressure will generally move southward away from the
waters through the week, with increasing troughing well offshore.
West-northwesterly winds will mainly be light today, with increasing
onshore flow this evening through tonight. Small Craft Advisory
winds likely at times for the central and eastern Strait of Juan de
Fuca during this period. Another round of stronger onshore flow
Thursday evening and Thursday night for the Strait of Juan de Fuca.
Gale force wind gusts are possible during this period, with
probabilities near 30-35%. Onshore flow will then continue through
Friday with a bit more in the way of northerly flow returning at
times over the weekend. Winds may reach SCA criteria later Saturday
into Sunday for the outer coastal waters with the increasing
northerly flow.
Seas ranging 4 to 6 feet through much of the week, likely building
to 7 to 9 feet over the weekend, with 10 ft seas possible for the
outer coastal waters Saturday into Sunday. JD
&&
.FIRE WEATHER...Fire Weather concerns remain elevated today with
mid-level Haines 6 over much of W WA through this afternoon.
However, RHs will be a little higher over most locations today,
keeping most critical fire weather conditions at bay. Isolated
locations in the Cascades could still see brief periods of Red Flag
conditions should RH values dip below what is forecast, however the
potential for this is not widespread enough to trigger any headlines
at this time.
Onshore push Wednesday night but mainly Thursday still looks to
bring cooler temps and increased RH values. The prospect of showers
still appears to be on tap for the end of the week with the best
chances focused on the Cascades, then diminishing further
westward...making it as far west as the eastern Puget Sound
lowlands. Thunderstorm potential still expected to remain east of
the Cascades, as neither stability indices nor CAPE are expected to
be there for thunderstorm development. Will continue to monitor
however, as the state of fuels there suggests that any strike would
lead to a potential fire start...even if development will be
extremely isolated at best. 18
&&
.HYDROLOGY...The daily hydrology discussion has ended until the
start of the next rainy season; it will only be updated as needed.
&&
.SEW WATCHES/WARNINGS/ADVISORIES...
WA...None.
PZ...Small Craft Advisory from 4 PM this afternoon to 8 AM PDT
Thursday for Central U.S. Waters Strait Of Juan De Fuca-
East Entrance U.S. Waters Strait Of Juan De Fuca.
&&1 heat. Local standard time, as filed.
A record high temperature of 82 degrees was set at Bellingham, WA airport on June 7th. This breaks the old record of 80 degrees set in 2015.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Washington in 2023Every state in 2023This day in weather historyWarnings in Washington, June 2023
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: 1114701.