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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 07133000 ARKANSAS RIVER AT LAMAR, CO


Prowers County, Colorado
Hydrologic Unit Code 11020009
Latitude  38°06'20.85", Longitude 102°37'05.54" NAD83
Drainage area 19,743  square miles
Contributing drainage area 18,793  square miles
Gage datum 3,597.39 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 1948-10-01 -> 2025-09-30)

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 33 36 29 93 82 168 324 289 157 42 28 23
2 34 36 24 124 80 165 325 276 132 39 26 23
3 34 34 23 130 97 188 329 272 131 39 23 23
4 33 36 24 132 100 196 318 255 115 39 22 23
5 33 35 22 135 101 290 318 245 111 42 21 23
6 35 34 21 137 112 157 344 247 105 44 21 23
7 35 36 21 133 119 162 335 221 104 51 21 23
8 37 40 23 135 136 166 342 208 78 55 21 23
9 36 41 25 144 150 150 333 197 78 51 22 23
10 31 41 33 148 149 182 345 205 86 52 22 22
11 31 35 31 154 152 205 349 225 78 50 22 23
12 31 33 24 146 151 225 359 226 69 47 23 23
13 33 32 24 145 170 210 397 211 65 42 22 24
14 36 36 24 165 165 211 366 197 62 36 22 24
15 36 34 23 151 169 222 348 172 75 32 22 25
16 36 32 22 145 156 255 350 164 73 32 23 34
17 35 31 21 124 168 219 344 147 64 30 23 36
18 35 32 21 108 174 572 346 147 52 29 23 35
19 35 33 21 106 169 357 329 157 49 25 22 30
20 36 33 27 104 183 289 319 142 47 24 22 29
21 36 34 37 121 168 279 341 126 43 23 22 29
22 36 38 45 131 164 269 336 134 43 21 22 30
23 36 37 35 131 152 297 335 145 47 18 22 34
24 35 35 36 117 163 340 307 158 47 19 22 34
25 34 32 39 105 170 297 303 145 56 19 23 34
26 33 32 50 100 192 281 360 152 47 23 23 34
27 35 33 50 88 204 275 320 127 40 23 23 34
28 35 32 58 100 171 288 301 123 42 21 23 31
29 37 22 64 108 166 296 280 157 42 20 23 29
30 36   77 96 218 314 318 149 42 20 23 27
31 35   88   213   311 148   24   28