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USGS Daily Statistics for Montana

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Questions or concerns about USGS data and data products in Montana and Wyoming can be directed to the Wyoming-Montana Water Science Center Data Management Section.


The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 12381400 South Fork Jocko River near Arlee MT


Lake County, Montana
Hydrologic Unit Code 17010212
Latitude  47°11'43.98", Longitude 113°51'02.65" NAD83
Drainage area 57.6  square miles
Gage datum 3,970 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month
Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1982-10-01 -> 2021-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 12 12 13 26 112 306 137 52 31 24 22 18
2 12 12 13 27 112 301 131 51 30 23 22 18
3 13 12 13 28 119 299 126 50 29 23 21 17
4 13 12 13 29 128 292 121 48 28 23 22 16
5 13 12 13 30 136 284 117 47 28 23 22 16
6 13 12 13 32 145 278 112 46 28 22 21 16
7 14 12 14 33 160 273 107 46 28 22 22 15
8 14 12 14 35 165 268 103 44 28 22 22 15
9 14 12 15 37 170 251 99 43 29 22 21 15
10 14 12 16 39 177 242 96 42 28 22 20 15
11 13 12 15 41 182 234 94 43 27 22 20 15
12 13 12 16 43 185 226 90 42 28 22 19 16
13 13 12 17 45 196 222 88 42 27 21 21 16
14 12 12 18 49 211 220 86 40 27 21 20 16
15 12 12 18 50 221 218 82 39 27 22 19 16
16 12 12 19 51 235 216 80 39 27 22 19 16
17 12 12 19 53 255 212 77 38 26 23 19 15
18 12 12 19 56 269 205 75 37 27 22 19 15
19 12 12 20 60 266 201 72 36 26 22 18 15
20 12 13 20 68 270 192 71 35 26 21 18 14
21 12 13 20 75 269 187 68 36 26 21 18 13
22 13 13 21 86 266 184 67 35 25 21 18 13
23 13 13 21 95 271 179 65 35 25 21 17 13
24 12 12 21 101 276 174 63 34 24 21 18 13
25 13 12 21 102 277 165 61 33 24 21 18 12
26 12 12 22 102 281 158 59 32 24 21 18 13
27 12 12 22 106 283 150 59 32 24 21 17 12
28 12 13 23 108 285 145 57 32 23 22 18 12
29 12 10 23 110 291 143 55 31 23 21 18 13
30 13   24 112 298 142 54 30 23 21 18 13
31 13   25   304   53 30   21   13