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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 06295000 Yellowstone River at Forsyth MT


Rosebud County, Montana
Hydrologic Unit Code 10100001
Latitude  46°15'59.89", Longitude 106°41'28.69" NAD83
Drainage area 40,152  square miles
Contributing drainage area 39,460  square miles
Gage datum 2,504.62 feet above NGVD29
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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 1977-10-01 -> 2024-09-30)

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 5,420 5,530 5,980 6,880 10,400 29,700 27,300 10,400 6,340 6,990 7,220 6,380
2 5,420 5,490 5,990 6,890 10,700 29,800 27,000 9,970 6,280 6,990 7,220 6,330
3 5,460 5,540 6,090 6,930 11,000 30,000 26,400 9,690 6,260 7,080 7,290 6,240
4 5,420 5,590 6,210 6,970 11,300 30,100 25,800 9,370 6,200 7,230 7,220 6,230
5 5,420 5,600 6,180 6,960 11,500 30,300 25,300 9,080 6,150 7,330 7,180 6,260
6 5,460 5,600 6,140 6,970 11,800 30,900 24,600 8,820 6,100 7,340 7,160 6,180
7 5,490 5,630 6,160 7,010 11,900 32,400 23,600 8,580 6,060 7,350 7,140 6,100
8 5,480 5,590 6,230 7,050 12,500 34,500 22,700 8,400 6,070 7,350 7,070 6,030
9 5,510 5,540 6,380 7,170 13,700 34,700 22,100 8,170 6,110 7,340 7,050 5,940
10 5,550 5,600 6,580 7,360 14,400 34,200 21,400 7,940 6,120 7,340 7,040 6,000
11 5,520 5,630 6,800 7,650 14,800 33,700 20,700 7,810 6,170 7,330 6,990 6,040
12 5,530 5,650 7,020 7,800 15,300 33,200 20,100 7,670 6,320 7,320 6,900 6,030
13 5,550 5,590 7,140 7,890 15,600 32,400 19,700 7,520 6,440 7,370 6,800 6,040
14 5,560 5,600 7,400 7,960 15,600 32,000 18,900 7,380 6,520 7,420 6,780 6,050
15 5,580 5,660 7,600 7,830 16,000 32,400 18,200 7,310 6,600 7,410 6,770 6,070
16 5,620 5,740 7,460 7,760 16,600 32,700 17,400 7,250 6,650 7,430 6,840 5,990
17 5,630 5,840 7,300 7,860 17,300 32,900 16,700 7,140 6,680 7,420 6,840 5,870
18 5,580 5,960 7,240 7,970 18,600 32,800 16,100 7,040 6,700 7,340 6,810 5,780
19 5,490 6,060 7,250 8,010 20,500 32,700 15,400 6,930 6,820 7,350 6,780 5,750
20 5,460 6,140 7,200 8,130 21,600 32,500 14,800 6,840 6,940 7,350 6,680 5,700
21 5,510 6,070 7,100 8,350 23,000 32,400 14,300 6,770 6,920 7,270 6,600 5,670
22 5,600 6,010 7,140 8,540 23,300 31,900 13,900 6,750 6,990 7,230 6,560 5,680
23 5,620 6,040 7,200 8,770 24,200 30,800 13,400 6,690 7,050 7,310 6,460 5,690
24 5,680 6,040 7,180 9,090 24,800 30,500 13,000 6,730 7,090 7,330 6,410 5,640
25 5,600 6,060 7,250 9,490 25,200 30,200 12,600 6,710 7,200 7,290 6,430 5,630
26 5,630 5,970 7,280 9,780 25,800 29,900 12,200 6,600 7,270 7,220 6,480 5,650
27 5,620 5,900 7,200 9,880 26,400 29,500 12,100 6,570 7,110 7,240 6,570 5,630
28 5,590 5,970 7,090 9,970 26,900 29,200 12,000 6,480 6,990 7,210 6,590 5,610
29 5,540 5,990 7,050 10,100 27,300 28,500 11,500 6,430 6,960 7,180 6,620 5,530
30 5,530   6,970 10,300 28,000 27,700 11,000 6,370 7,000 7,250 6,480 5,460
31 5,570   6,900   29,200   10,700 6,350   7,250   5,520