An isolated thunderstorm brought report of low end wind damage.
Every event with a place to put it. Tap one for its entry below.
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 OTX wrote it up.
An isolated thunderstorm brought report of low end wind damage.
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 Spokane, WA wrote its last area forecast discussion before the first event at Aug 27, 1:37 PM PST, 1 hour 10 minutes earlier.
Area Forecast Discussion
National Weather Service Spokane WA
237 PM PDT Tue Aug 27 2024
.SYNOPSIS...
Winds will decrease through this evening, but remain generally
breezy across the basin into Wednesday. Sheltered mountain valleys
will be chilly tonight with patches of frost. Wednesday and
Thursday will be dry with cool mornings and mild afternoon
temperatures. Warm and dry conditions will return to the Pacific
Northwest Friday through the Labor Day weekend.
&&
.DISCUSSION...
Tonight through Wednesday night: Vigorous cold front early in the
day has brought gusty west winds, critical fire weather conditions,
and patchy blowing dust across the region. These conditions are
expected to continue into the evening hours. Winds will decrease
rather quickly after 7 PM this evening. This will decrease risk
levels that are expected through the rest of the afternoon. The low
pressure center will skirt across the Canadian border of northwest
Montana tonight. Moisture wrapping around the low will stream in
across northeast Washington into the Northern Panhandle with clouds
and light rain possible. There is a 15-30% chance for measurable
rain (at least 0.01 inches) from Northport to Bonners Ferry and
Sandpoint tonight into early Wednesday. Water vapor satellite does
show a lot of dry air moving in behind the cold front with dew
points dropping into the 20s. Sheltered mountain valleys will see
the potential for temperatures to radiate out depending on cloud
cover. If skies do clear out, then temperatures have a chance to
decrease into the lower 30s with frost forming in Republic,
Colville, Chewelah, Deer Park, Newport, and other surrounding
communities.
Winds will continue to be breezy into Wednesday, but not nearly to
the magnitude to what is being seen today. Expect sustained winds
of 10-20 mph with gusts up to around 25 mph for Wednesday.
Conditions will remain dry with dew points in the 30s and
temperatures slightly warmer in the 70s. It will be a dry and breezy
dry across the Upper Columbia Basin, into the Spokane Area, and
Palouse. Fire weather conditions will be elevated, but not expected
to see critical fire weather conditions like what is transpiring
today. Clouds will be decrease on Wednesday with sunny conditions
across at least eastern Washington. The Idaho Panhandle will be
hanging on to light showers and these will dissipate through the
afternoon as well. /SVH
Thursday through Tuesday: Models continue to remain in good
agreement for an upper level ridge to shift into the Pacific
Northwest ahead of an upper level low off the northern California
coast. Temperatures will gradually warm through the end of the week,
with values in the low 90s to low 100s by Sunday. The NBM is
favoring places in the lower Washington Columbia Basin and the L-C
valley showing a 70 to 80 percent chance for temperatures above 100
degrees on Sunday. This level of heat will result in a moderate risk
for heat related illnesses, impacting individuals who are most
sensitive to heat.
By the late weekend into early next week, models continue to show
the the breakdown of the ridge as the low ejects northeastward into
the region. An influx of elevated moisture and instability will
bring the potential for thunderstorms across the region some time
between late Sunday and early Tuesday. Timing differences in the
ensemble members is keeping NBM precipitation probabilities less
than 20 percent across the Inland Northwest, but I would expect this
to increase as models come into better agreement. /vmt
&&
.AVIATION...
18Z TAFS: VFR conditions will continue through the TAF period. A
passing cold front will move through extreme eastern Washington
and the Idaho Panhandle. Cold front will be mostly dry at the TAF
sites with light showers and isolated thunder across the northern
mountains near Omak, Colville, Sandpoint, and Bonners Ferry. Gusty
west winds expected through the afternoon. Winds will be strongest
at the Wenatchee Airport with sustained winds of 20-30 kts and
gusts up to 40-45 kts. Across the exposed areas of the Columbia
Basin, winds will be up around 20-25 kts with gusts up to 35-40
kts at times. There will be the potential for blowing dust and
smoke from any grass fires that may get established today. Winds
will decline through the evening and overnight as the region
stabilizes behind the front.
FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS: High confidence
for VFR conditions through the TAF period. The greatest
uncertainty will be visibility restrictions from haze or blowing
dusts as strong winds blow across the ag fields of Central WA.
Given the low confidence, this was not added to the TAFS sites but
will need to be monitored through the day for future amendments.
/SVH
-----------------------
Confidence descriptors:
Low - Less than a 30 percent chance
Moderate - 30 to 70
percent chance
High - Greater than a 70 percent chance
For additional probabilistic information for NWS Spokane airports,
please refer to the Aviation Dashboard on our webpage:
https:/www.weather.gov/otx/avndashboard
&&
.PRELIMINARY POINT TEMPS/POPS...
Spokane 45 75 46 80 51 87 / 0 10 0 0 0 0
Coeur d'Alene 42 71 44 78 49 84 / 10 20 0 0 0 0
Pullman 38 67 41 78 46 86 / 0 0 0 0 0 0
Lewiston 48 76 50 86 55 92 / 0 0 0 0 0 0
Colville 35 74 37 80 42 85 / 20 10 0 0 0 0
Sandpoint 41 69 41 76 46 81 / 20 30 0 0 0 0
Kellogg 43 65 46 75 53 82 / 10 20 0 0 0 0
Moses Lake 42 77 46 83 50 89 / 0 0 0 0 0 0
Wenatchee 49 78 55 83 61 89 / 0 0 0 0 0 0
Omak 45 78 50 85 54 89 / 0 0 0 0 0 0
&&
.OTX WATCHES/WARNINGS/ADVISORIES...
ID...None.
WA...Red Flag Warning until 8 PM PDT this evening for Colville
Reservation (Zone 702)-Eastern Columbia Basin -Palouse -
Spokane Area (Zone 708)-Foothills of Central Washington
Cascades (Zone 705)-Foothills of Northeast Washington (Zone
701)-Lower Palouse -Snake River (Zone 709)-Okanogan Valley
(Zone 703)-Waterville Plateau (Zone 706)-Western Columbia
Basin (Zone 707).
Wind Advisory until 8 PM PDT this evening for Waterville Plateau-
Wenatchee Area.
&&Preliminary Local Storm Report
National Weather Service Spokane WA
311 PM PDT Tue Aug 27 2024
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0130 PM Blowing Dust 8 N Moses Lake 47.23N 119.28W
08/27/2024 Grant WA Trained Spotter
Spotter GR009 reported blowing dust across
Stratford Road between Moses Lake and
Stratford. Visibility dropped as low as 100
yds near Crab Creek along Moses
Lake-Stratford Rd.
&&The Spokane radar (KOTX), 6 km away, was scanning. The volume nearest the first event began at 22:44 UTC.
1 thunderstorm wind. Local standard time, as filed.
A report of 1 inch diameter tree branches broken and shingles blown off roof was received through mping.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Washington in 2024Every state in 2024This day in weather historyWarnings in Washington, August 2024
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: 1214182.