MEDIAN FLOW RATE · 30 DAY
35cfs 35.3% vs avg
Optimal band: 27–37 cfs
PERIOD HIGH
58cfs
PERIOD LOW
21cfs
RUNNABLE
23%
last 30 day in band
Gauge Height
4.87ft
Water Temperature
80.8°F
Weather Map
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Precipitation History
Precipitation · YTD
NormalNear-normal year
2026 to date
21.3in
≈ normal
21.3 in of precipitation so far this year — about average for this point in the season (normal 23.69 in).
YTD Total
21.3in
This year so far
Normal to Date
23.7in
30-yr average
Typical Range
19.4–30.8in
10th–90th pct YTD
Departure
-10%
vs 30-yr normal
By Month
This year
Typical range
Normal
Jan: 2.65" · normal 3.40" (2.0–5.0)
Feb: 3.25" · normal 2.99" (1.1–4.8)
Mar: 2.03" · normal 4.04" (2.5–5.8)
Apr: 1.35" · normal 3.31" (1.9–4.6)
May: 3.33" · normal 3.47" (1.4–5.8)
Jun: 4.95" · normal 4.20" (2.5–6.0)
Jul: 3.74" (so far)· normal 5.15" (2.1–8.2)
Aug: normal 4.89" (2.4–8.3)
Sep: normal 4.66" (1.1–8.2)
Oct: normal 3.81" (1.6–6.9)
Nov: normal 3.19" (1.1–6.0)
Dec: normal 3.41" (2.0–4.8)
Baseline 1991–2020 · Source: Open-Meteo02:53 UTC
Your History · DRAGON SWAMP AT MASCOT, VA
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Station Location
37.6338, -76.6963Loading map …
DATA · USGS · NOAA · NWSUPDATED 2026-07-15 00:00 UTC
Site #01669520·USGS
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