MEDIAN FLOW RATE · 1 YEAR
11cfs 9.2% vs avg
Optimal band: 42–56 cfs
PERIOD HIGH
520cfs
PERIOD LOW
7cfs
RUNNABLE
7%
last 1 year in band
Gauge Height
2.93ft
Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
6.5in
≈ normal
6.48 in of precipitation so far this year — about average for this point in the season (normal 7.08 in).
YTD Total
6.5in
This year so far
Normal to Date
7.1in
30-yr average
Typical Range
5.0–9.9in
10th–90th pct YTD
Departure
-8%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 0.81" · normal 2.25" (0.9–3.8)
Feb: 1.58" · normal 1.61" (0.5–3.2)
Mar: 2.30" · normal 1.28" (0.5–2.3)
Apr: 1.15" · normal 0.79" (0.1–1.3)
May: 0.51" · normal 0.73" (0.3–1.3)
Jun: 0.14" · normal 0.37" (0.1–0.7)
Jul: 0.00" (so far)· normal 0.13" (0.0–0.3)
Aug: normal 0.11" (0.0–0.3)
Sep: normal 0.32" (0.0–0.7)
Oct: normal 1.14" (0.3–2.1)
Nov: normal 2.05" (0.7–3.7)
Dec: normal 2.56" (1.4–3.9)
Baseline 1991–2020 · Source: Open-Meteo23:13 UTC
Your History · AHTANUM CREEK AT UNION GAP, WA
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Weather Conditions
WEATHER CONDITIONS
TODAY
88°
63°
MON
95°
63°
TUE
101°
69°
WED
104°
75°
THU
107°
78°
FRI
105°
76°
SAT
103°
70°
FISH INDEX
Temperature
Warm
Wind
Moderate
Pressure
Rising — Slow
Moon Phase
Average
DAYLIGHT
SUNRISE
05:21 AM
SUNSET
08:53 PM
15H 32M OF DAYLIGHT
MOON PHASE
Waning Crescent
7% illuminated
Station Location
46.5360, -120.4734Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-12 00:00 UTC
Site #12502500·USGS
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