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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 06130000 Flatwillow Creek near Mosby MT


Petroleum County, Montana
Hydrologic Unit Code 10040203
Latitude  46°55'43.18", Longitude 107°55'58.23" NAD83
Drainage area 1,855  square miles
Gage datum 2,563 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 1963-10-01 -> 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 36 57 77 159 146 306 220 26 86 32 52 46
2 37 55 69 183 164 289 204 26 72 29 52 49
3 38 52 62 163 266 370 197 28 67 29 52 46
4 38 51 67 144 380 764 192 39 59 170 54 44
5 38 52 73 157 382 888 194 38 55 314 55 42
6 38 52 87 164 331 588 154 39 52 294 54 41
7 37 51 111 155 378 448 137 37 51 247 51 41
8 41 51 145 148 418 380 135 28 48 138 51 43
9 39 51 181 135 385 341 133 24 46 88 50 43
10 39 62 223 141 322 291 133 22 44 67 49 44
11 39 75 304 147 255 294 130 20 44 55 43 45
12 39 89 380 154 228 459 135 20 43 48 47 46
13 39 109 315 158 210 467 116 21 41 45 47 45
14 39 101 266 159 204 486 109 21 41 44 47 45
15 41 102 216 153 200 437 106 20 40 42 48 45
16 41 105 179 147 186 384 98 21 38 41 48 44
17 42 111 175 151 176 298 87 20 38 40 47 43
18 43 97 192 164 176 315 90 19 38 40 47 43
19 44 122 225 156 180 451 82 19 37 40 49 42
20 44 216 310 165 198 556 77 43 36 44 48 41
21 44 184 288 152 187 574 68 52 36 44 44 42
22 44 138 252 141 193 409 64 32 34 44 43 40
23 44 120 233 164 185 311 59 62 34 44 44 39
24 45 125 215 178 172 274 49 498 33 46 46 42
25 47 125 200 180 172 258 42 1,890 34 49 42 40
26 50 112 189 176 170 253 37 1,390 32 52 40 38
27 52 120 176 181 184 224 40 641 31 52 39 37
28 57 96 159 180 260 207 46 391 31 52 41 36
29 61 135 147 165 361 231 32 240 34 48 45 35
30 58   141 148 359 217 32 152 34 49 45 34
31 57   139   345   29 117   53   35