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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 07381490 Atchafalaya River at Simmesport, LA


Avoyelles Parish, Louisiana
Hydrologic Unit Code 08080101
Latitude  30°58'57", Longitude  91°47'54" NAD83
Drainage area 87,570.00  square miles
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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 2009-10-01 -> 2022-09-30)

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
1 252,000 283,000 291,000 393,000 345,000 378,000 264,000 211,000 143,000 131,000 145,000 176,000
2 260,000 282,000 298,000 391,000 342,000 375,000 264,000 207,000 141,000 126,000 146,000 177,000
3 267,000 282,000 305,000 392,000 342,000 371,000 264,000 203,000 138,000 128,000 145,000 178,000
4 272,000 285,000 311,000 390,000 344,000 366,000 265,000 201,000 136,000 127,000 140,000 180,000
5 276,000 284,000 317,000 387,000 348,000 363,000 267,000 198,000 136,000 126,000 138,000 182,000
6 278,000 283,000 320,000 384,000 353,000 358,000 266,000 193,000 135,000 126,000 140,000 185,000
7 280,000 283,000 325,000 382,000 358,000 355,000 268,000 188,000 133,000 123,000 142,000 186,000
8 283,000 283,000 330,000 382,000 363,000 351,000 270,000 186,000 131,000 122,000 147,000 188,000
9 285,000 281,000 337,000 380,000 369,000 348,000 271,000 187,000 130,000 122,000 150,000 191,000
10 292,000 280,000 346,000 378,000 373,000 346,000 271,000 184,000 129,000 126,000 150,000 198,000
11 297,000 283,000 352,000 377,000 378,000 343,000 273,000 180,000 130,000 131,000 150,000 204,000
12 298,000 286,000 357,000 376,000 380,000 338,000 274,000 177,000 131,000 130,000 151,000 206,000
13 296,000 289,000 364,000 376,000 382,000 335,000 272,000 176,000 131,000 131,000 175,000 208,000
14 294,000 291,000 369,000 375,000 384,000 332,000 271,000 173,000 130,000 132,000 174,000 212,000
15 292,000 293,000 374,000 372,000 388,000 331,000 271,000 168,000 132,000 133,000 175,000 219,000
16 290,000 293,000 377,000 371,000 391,000 325,000 269,000 163,000 131,000 133,000 173,000 222,000
17 289,000 291,000 381,000 368,000 393,000 321,000 266,000 160,000 129,000 135,000 171,000 224,000
18 288,000 291,000 383,000 366,000 392,000 318,000 264,000 159,000 128,000 139,000 169,000 225,000
19 284,000 291,000 384,000 366,000 394,000 313,000 261,000 158,000 126,000 140,000 170,000 230,000
20 280,000 288,000 386,000 367,000 395,000 307,000 258,000 156,000 125,000 139,000 171,000 231,000
21 279,000 286,000 389,000 365,000 395,000 301,000 252,000 156,000 127,000 139,000 169,000 232,000
22 279,000 286,000 393,000 364,000 397,000 298,000 249,000 155,000 129,000 138,000 168,000 232,000
23 281,000 282,000 393,000 366,000 396,000 296,000 246,000 154,000 128,000 138,000 168,000 231,000
24 281,000 278,000 394,000 366,000 394,000 291,000 242,000 151,000 128,000 139,000 167,000 230,000
25 282,000 276,000 395,000 364,000 392,000 285,000 240,000 148,000 128,000 139,000 166,000 230,000
26 283,000 279,000 396,000 361,000 391,000 283,000 236,000 146,000 129,000 141,000 168,000 232,000
27 284,000 282,000 393,000 357,000 390,000 279,000 231,000 146,000 130,000 144,000 171,000 234,000
28 283,000 287,000 393,000 353,000 389,000 274,000 228,000 145,000 129,000 142,000 173,000 238,000
29 283,000 335,000 395,000 349,000 388,000 269,000 225,000 142,000 131,000 139,000 174,000 239,000
30 282,000   396,000 345,000 385,000 264,000 221,000 142,000 133,000 138,000 176,000 242,000
31 282,000   397,000   382,000   216,000 143,000   138,000   246,000