Washington, 2026Flooding in Washington, March 18 to 20, 2026
March 18 to 20, 2026 · NWS OTX · 3 events in 1 county or zone
With 2 to 4 inches of precip and snow melt, minor flooding issues were reported along the some of the Cascade creeks and streams.
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- Deaths
- 0
- Injuries
- 0
- Property damage
- $13,000
- Crop damage
- None recorded
- Events
- 3
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.
With 2 to 4 inches of precip and snow melt, minor flooding issues were reported along the some of the Cascade creeks and streams.
What forecasters said that day
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 Mar 18, 3:38 PM PST, 3 hours 7 minutes earlier. Its key messages:
- Warming Trend: Temperatures climbing above seasonal averages this week with widespread afternoon highs in the 60s to low 70s.
- Hydrology Concerns: Rain on snow in the Cascades and Idaho Panhandle will lead to rises on creeks and streams.
- Breezy Winds: Persistent southwest winds are forecast with afternoon gusts up to 40 mph Tuesday through Friday.
Area forecast discussion, Mar 18, 3:38 PM PST, 3 hours 7 minutes before
Area Forecast Discussion
National Weather Service Spokane WA
438 PM PDT Wed Mar 18 2026
.KEY MESSAGES...
- Warming Trend: Temperatures climbing above seasonal averages
this week with widespread afternoon highs in the 60s to low
70s.
- Hydrology Concerns: Rain on snow in the Cascades and Idaho
Panhandle will lead to rises on creeks and streams.
- Breezy Winds: Persistent southwest winds are forecast with
afternoon gusts up to 40 mph Tuesday through Friday.
&&
.SYNOPSIS...
A warmer and periodically breezy pattern continues through
Friday. Snowmelt combined with moderate to heavy precipitation
in the North Cascades and light precipitation over the Idaho
Panhandle mountains will lead to rises on rivers. A cold front
Friday night will bring cooler temperatures for the weekend with
dry conditions expected Saturday through Monday. Unsettled
conditions will return Tuesday with a return of snow in the
mountains.
&&
.DISCUSSION...
Wednesday night through Friday: Eastern Washington and north
Idaho remain positioned on the northern periphery of a large
upper-level ridge centered over the Southwest US. Meanwhile,
persistent troughing in the Gulf of Alaska will direct an
atmospheric river into southern British Columbia, Washington,
and north Idaho through the work week. Orographic lift will
serve as the primary forcing mechanism for ascent, with the
heaviest precipitation concentrated from the western slopes of
the Cascades to the crest. The Inland Northwest will be on the
warm side of the polar jet streak directed into BC, with very
mild temperatures expected through Friday. Precipitation will
fall primarily as rain, with 72-hour totals along the Cascade
crest ranging from 1 to 2.5 inches through Friday afternoon. The
combination of moderate rainfall and anomalously warm
temperatures will accelerate snowmelt and lead to rises on
smaller creeks and streams. The greatest area of concern is for
the Stehekin River where these conditions are leading to sharp
rises.
Farther east, the moisture plume directed into the PNW will
continue to bring light rain across north Idaho, with the
largest totals for the Selkirk and Cabinet mountains.
Precipitation totals will be much less compared to the Cascades
with the 90th percentile 72-hour amounts peaking around 1.5
inches for the highest elevations. Snowmelt will continue to
contribute to rises in the smaller creeks and streams, but
flooding is not expected.
The persistent influx of warm, moist air into the Inland
Northwest will result in cloudy, but warm days. High
temperatures will climb into the upper 50s to low 70s each
afternoon through Friday, while overnight lows remain
unseasonably mild in the 40s and 50s. Weak systems moving
through Canada will continue to promote a modest south to
southwest surface pressure gradient (around +8 from PUW- YLW, +8
for YKM-YQL), which will support breezy winds for Wednesday and
Thursday.
Friday night through Tuesday: Models remain in good agreement
for a cold front to move through Friday night. Better forcing
with the front will bring an increased chance for light preciptiation
across eastern Washington and north Idaho lowlands. This will
also bring an increase in winds as a surface low deepens east of
the Canadian Rockies. The NBM continues to advertise a 20 to 40
percent chance for wind gusts exceeding 40 mph. Temperatures
will cool this weekend with widespread highs returning to the
upper 40s and mid 50s for the weekend and into early next week.
Drier air will move in behind the front, bringing an end to the
persistent moisture stream and mountain precipitation Saturday
through Monday. Models are showing a stronger frontal system to
approach the Pacific Northwest on Tuesday. While models agree on
the presence of this system, there are significant differences
in the strength and position of the surface low as it approaches
the BC Coast. This will bring a return of mountain snow,
lowland rain, and gusty winds to the Inland Northwest Tuesday.
/vmt
&&
.AVIATION...
00Z TAFS: VFR conditions forecast at all TAF sites. Variable
clouds expected, with ceilings generally 6000 feet or higher.
Gusty winds will subside through the evening hours. Some LLWS
is possible near GEG/SFF overnight/early Thursday. Wind gusts
around the mid 20s expected Thursday afternoon with increased
diurnal mixing.
FORECAST CONFIDENCE AND/OR ALTERNATE SCENARIOS:
High confidence in VFR conditions through the forecast period.
Moderate confidence in gusty wind and timing.
-----------------------
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 49 65 50 64 39 54 / 20 20 20 40 40 20
Coeur d'Alene 46 62 48 61 40 54 / 40 40 40 60 60 30
Pullman 47 67 50 66 42 51 / 10 10 10 20 50 40
Lewiston 50 74 53 72 48 58 / 0 0 10 10 40 30
Colville 47 65 48 64 36 56 / 30 40 30 70 20 20
Sandpoint 44 57 45 55 40 54 / 50 60 60 80 70 40
Kellogg 44 58 46 58 42 50 / 30 40 40 60 80 50
Moses Lake 51 73 51 71 38 57 / 10 10 10 20 10 0
Wenatchee 48 67 48 65 37 53 / 20 30 20 50 10 0
Omak 48 68 47 66 36 56 / 20 30 30 60 10 0
&&
.OTX WATCHES/WARNINGS/ADVISORIES...
WA...None.
ID...None.
&&
Flood, Chelan
- When
- March 18, 6:45 PM PST to 8:45 PM PST
- Where
- Chelan County, 0.68 mi SSW of Cashmere to 0.69 mi S of Cashmere
- Cause
- Heavy Rain / Snow Melt
- Property damage
- $10,000
- Reported by
- Emergency Manager
- Coordinates
- 47.511, -120.474
Mission Creek flooded a residence due to debris from 2025 Labor Mountain fire burn scar causing a backup on the river. Other than this spot, creek was within its banks. Time estimated from river crest.
Flood, Chelan
- When
- March 20, 9:00 AM PST to 12:00 PM PST
- Where
- Chelan County, 4.97 mi NW of Stehekin to 4.99 mi NW of Stehekin
- Cause
- Heavy Rain / Snow Melt
- Property damage
- $1,000
- Reported by
- Public
- Coordinates
- 48.360, -120.740
Social media shared a video showing water Company Creek Road. Exact location and time estimated.
Flood, Chelan
- When
- March 20, 1:00 PM PST to 4:00 PM PST
- Where
- Chelan County, 1.78 mi E of Monitor to 1.7 mi E of Monitor
- Cause
- Heavy Rain / Snow Melt
- Property damage
- $2,000
- Reported by
- Emergency Manager
- Coordinates
- 47.478, -120.382
EM reported Wenatchee River rerouted in a spot following December 2025 flood. Current river levels are resulting in flooding near Sleepy Hollow Road. Time and exact location estimated.
- Flood
- Flooding that develops more slowly than a flash flood: rivers leaving their banks, or water standing over land for an extended time.
After NWS Directive 10-1605, the rules offices file Storm Data by.
- Rip Currents in Puerto Rico, March 18, 20264 deaths · 6 injured · 3 events
- High Wind in Montana, March 18, 202665 kt wind · 5 events
- Heat in California, March 18, 20265 events
- Wildfire in Montana, March 18 to 20, 20262 events
- Flood in Maine, March 18 to 19, 20261 event
- Heavy Snow in Alaska, March 18 to 19, 20261 event
- Flood in Maine, March 18, 20261 event
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: 1328707, 1328708, 1328709.