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USGS Daily Statistics for the Nation

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 06471500 ELM RIVER AT WESTPORT,SD


Brown County, South Dakota
Hydrologic Unit Code 10160004
Latitude  45°39'22", Longitude  98°29'48" NAD27
Drainage area 1,505  square miles
Contributing drainage area 1,210  square miles
Gage datum 1,310.04 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 1945-10-01 -> 2023-09-30)

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 4.5 3.7 26 362 132 70 87 37 17 8.8 18 13
2 4.4 3.9 28 381 143 60 85 33 16 8.7 17 13
3 4.3 3.9 35 410 147 55 88 32 16 8.5 17 13
4 4.1 3.9 42 413 151 52 87 39 16 8.2 16 12
5 4 4 34 436 156 51 77 34 14 8.5 15 11
6 4 4 31 435 148 52 74 32 14 9.3 15 10
7 4.1 4 31 400 129 52 83 29 14 9.7 13 9.6
8 6.6 4 27 414 126 52 101 26 13 9.8 13 9.1
9 6 4.1 30 480 139 53 111 24 15 11 12 8.6
10 4.8 4.4 43 527 166 79 116 25 15 12 12 8.2
11 4.5 4.9 50 485 183 98 119 24 14 12 11 7.9
12 4.4 4.9 59 480 179 93 106 23 14 12 11 7.7
13 4.4 4.8 72 425 178 85 92 29 15 12 11 7.4
14 4.2 5.1 106 373 171 88 92 33 15 12 11 7.1
15 4 5.3 203 341 150 88 92 34 14 12 11 6.9
16 3.8 6 262 314 128 83 86 32 14 12 10 6.6
17 3.7 7.6 338 288 112 83 76 28 14 13 9.9 6.3
18 3.8 10 319 270 102 85 65 27 14 14 9.9 6.2
19 3.8 22 327 259 97 81 56 25 14 14 9.6 6
20 3.7 33 327 256 95 92 50 24 14 15 9.6 5.8
21 3.7 32 316 263 93 118 52 22 13 18 9.6 5.6
22 3.8 36 325 254 84 166 53 21 12 21 9.1 5.5
23 3.8 39 340 244 85 194 49 19 11 22 8.9 5.4
24 3.9 33 376 213 91 194 43 18 10 23 9.2 5.3
25 3.9 32 408 185 86 173 39 17 9.8 24 9.6 5.2
26 3.9 29 394 164 84 147 93 18 9.3 28 9.8 5.2
27 3.8 27 407 151 89 129 114 20 8.7 29 10 5
28 3.8 30 455 143 82 109 81 21 8.4 26 11 4.9
29 3.7 32 452 137 80 109 65 23 8.1 22 12 4.8
30 3.7   434 137 75 103 52 22 8.3 21 13 4.8
31 3.7   389   73   43 20   20   4.6