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USGS Surface-Water Daily Statistics for California

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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
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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 -> 2021-09-30)

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
1 121 100 831 203 92 65 48 51 50 113 87 102
2 157 169 803 131 79 68 51 56 53 59 80 134
3 134 174 665 114 93 62 49 54 47 59 78 147
4 366 165 597 142 72 59 46 50 51 65 98 225
5 326 191 618 131 81 78 46 50 58 89 83 140
6 306 415 462 140 155 55 45 47 52 67 94 229
7 406 355 420 132 123 56 47 50 51 66 110 252
8 208 314 506 127 88 55 46 51 48 64 132 108
9 648 420 300 149 83 57 47 51 48 70 126 128
10 734 284 258 120 84 54 48 51 74 73 110 117
11 701 427 285 125 85 54 49 50 57 75 106 136
12 433 493 162 107 126 57 50 50 52 72 98 180
13 383 382 209 90 132 58 67 47 51 76 90 126
14 586 492 189 135 117 56 73 49 47 79 100 131
15 540 449 225 108 100 60 53 50 70 70 90 191
16 507 539 225 92 98 86 49 66 52 69 121 244
17 460 746 230 91 90 56 45 74 53 110 114 157
18 491 507 178 102 96 59 44 53 56 89 106 206
19 339 861 188 78 91 58 47 68 57 79 109 262
20 405 921 213 145 84 60 49 51 57 177 139 189
21 269 901 230 110 80 60 52 47 56 74 190 221
22 290 743 204 99 99 61 51 46 66 109 146 274
23 268 727 189 91 88 57 47 46 57 81 204 127
24 373 717 176 76 83 52 47 45 76 78 264 210
25 641 778 247 83 78 55 49 45 82 65 166 185
26 641 782 180 92 68 57 51 48 65 84 188 201
27 420 782 228 74 60 59 51 49 61 131 131 161
28 388 698 175 97 102 57 53 49 63 71 193 244
29 235 67 121 101 66 53 53 49 75 75 203 309
30 163   98 106 69 50 52 51 78 119 248 111
31 238   138   71   50 52   74   167