Washington, 2026

Flooding 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.

Where it happened

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The toll

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.

What happened

The episode as NWS OTX wrote it up.

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.

&&

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

3 flood. Local standard time, as filed.

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.

What these are

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.

The same day elsewhere

More

Every storm in Washington in 2026Every state in 2026This day in weather historyWarnings in Washington, March 2026

Sources

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.