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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 11087020 SAN GABRIEL R AB WHITTIER NARROWS DAM CA


Los Angeles County, California
Hydrologic Unit Code 18070106
Latitude  34°02'03", Longitude 118°02'14" NAD27
Drainage area 442  square miles
Gage datum 219.24 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 1955-10-01 -> 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
1 129 112 817 195 95 66 47 50 47 107 83 97
2 150 163 776 128 79 69 49 54 51 57 77 128
3 133 166 638 112 89 63 47 51 45 57 75 140
4 352 210 572 139 78 60 44 48 48 64 94 216
5 330 307 591 129 80 77 44 48 55 86 80 134
6 293 478 447 134 149 54 43 46 50 64 90 219
7 388 356 405 127 118 56 45 48 48 64 106 241
8 199 303 487 123 85 55 44 49 45 63 157 103
9 632 402 289 145 80 56 45 49 46 67 125 123
10 739 274 259 122 82 54 46 49 70 70 105 112
11 671 408 275 127 83 54 47 49 56 72 101 147
12 415 472 158 107 121 56 48 49 50 69 95 175
13 367 366 204 87 127 57 64 46 49 73 86 121
14 590 472 207 137 113 55 70 47 45 75 95 146
15 525 432 297 106 97 59 50 48 67 67 88 183
16 502 518 232 95 95 84 46 63 51 66 115 233
17 439 711 238 96 88 56 43 70 51 105 109 150
18 470 483 189 103 94 58 42 51 54 85 101 197
19 325 828 199 81 89 57 45 65 56 76 104 250
20 389 908 236 145 83 57 47 84 55 168 133 186
21 260 872 310 113 79 58 50 65 54 71 181 215
22 296 708 267 103 97 59 48 48 63 104 139 269
23 258 695 218 94 87 55 45 49 55 77 194 142
24 360 705 191 79 82 49 45 44 73 74 251 214
25 612 786 256 86 78 53 46 44 78 66 158 180
26 613 750 193 94 69 55 48 47 62 81 179 200
27 403 750 236 78 61 57 49 47 58 125 125 166
28 372 675 194 100 100 55 50 46 60 68 184 236
29 226 72 127 105 66 51 51 47 71 72 193 301
30 158   119 104 71 48 50 49 74 114 236 147
31 227   146   72   49 49   71   169