USGS · 05018500

ST. MARY CANAL

USGS · 05018500LIVE

St. Mary Canal at St. Mary Crossing near Babb MT

GLACIER COUNTY, MT48.9470°N, -113.3753°W Updated 1 hr ago

FLOW RATE

598cfs

AIR TEMP

76°F

WIND

10mph WSW

FISH INDEX

75SCORE / 100

GREAT · 4 OF 5

1D 7D 30D 1YR

Flow Rate Historical Avg

MEDIAN FLOW RATE · 7 DAY

598cfs 34.2% vs avg

Optimal band: 503–681 cfs

PERIOD HIGH

622cfs

PERIOD LOW

516cfs

RUNNABLE

100%

last 7 day in band

Precipitation History

Precipitation · YTD

Wet

Wetter than normal

2026 to date

18.7in

+27% vs normal

18.71 in of precipitation so far this year, 27% above the 30-year normal of 14.73 in for this point in the season.

YTD Total

18.7in

This year so far

Normal to Date

14.7in

30-yr average

Typical Range

10.5–18.7in

10th–90th pct YTD

Departure

+27%

vs 30-yr normal

By Month

This year

Typical range

Normal

Jan: 0.75" · normal 1.19" (0.7–1.7)

Jan

Feb: 0.78" · normal 1.24" (0.4–2.1)

Feb

Mar: 2.73" · normal 1.59" (0.7–2.3)

Mar

Apr: 2.17" · normal 2.43" (1.5–3.5)

Apr

May: 3.58" · normal 3.40" (1.9–5.5)

May

Jun: 8.57" · normal 4.33" (2.0–8.5)

Jun

Jul: 0.15" (so far)· normal 1.76" (0.5–3.3)

Jul

Aug: normal 1.77" (0.4–3.4)

Aug

Sep: normal 1.95" (0.8–3.5)

Sep

Oct: normal 1.86" (0.7–3.2)

Oct

Nov: normal 1.67" (0.8–2.5)

Nov

Dec: normal 1.32" (0.6–2.1)

Dec

Baseline 1991–2020 · Source: Open-Meteo12:01 AM

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Station Location

48.9470, -113.3753

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DATA · USGS · NOAA · NWSUPDATED 2026-07-08 00:00 UTC

Site #05018500·USGS

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