MEDIAN FLOW RATE · 1 YEAR
46cfs 34.3% vs avg
Optimal band: 52–70 cfs
PERIOD HIGH
629cfs
PERIOD LOW
30cfs
RUNNABLE
40%
last 1 year in band
Gauge Height
2.06ft
Weather Map
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Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
22.0in
≈ normal
22 in of precipitation so far this year — about average for this point in the season (normal 23.48 in).
YTD Total
22.0in
This year so far
Normal to Date
23.5in
30-yr average
Typical Range
18.7–30.4in
10th–90th pct YTD
Departure
-6%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 2.85" · normal 3.20" (2.0–4.5)
Feb: 1.87" · normal 2.82" (1.8–5.0)
Mar: 3.46" · normal 4.02" (1.8–5.8)
Apr: 2.04" · normal 3.67" (2.1–5.8)
May: 4.68" · normal 3.83" (1.9–5.8)
Jun: 3.91" · normal 4.16" (2.0–7.1)
Jul: 3.19" (so far)· normal 4.54" (2.2–6.9)
Aug: normal 3.91" (2.0–6.2)
Sep: normal 4.80" (1.8–9.0)
Oct: normal 3.91" (1.6–6.0)
Nov: normal 3.05" (1.3–4.7)
Dec: normal 3.76" (1.7–5.8)
Baseline 1991–2020 · Source: Open-Meteo22:37 UTC
Your History · DEER CREEK AT ROCKS, MD
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Station Location
39.6300, -76.4033Loading map…
DATA · USGS · NOAA · NWSUPDATED 2026-07-13 00:00 UTC
Site #01580000·USGS
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