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USGS 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
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
1 130 97 828 197 90 65 47 50 47 107 84 99
2 153 163 780 127 76 68 49 54 51 57 78 130
3 132 168 647 112 88 62 47 51 45 57 76 142
4 357 160 580 140 77 60 44 48 48 63 95 218
5 335 186 600 130 79 77 44 48 55 86 81 135
6 297 402 449 136 150 54 43 46 50 64 91 222
7 394 344 408 128 119 56 45 48 48 64 107 244
8 202 304 492 123 86 55 44 49 45 62 159 104
9 642 407 293 145 81 56 45 49 46 67 127 124
10 751 275 263 117 82 54 46 49 70 70 107 113
11 682 413 279 122 83 54 47 49 56 72 102 149
12 422 478 160 104 122 56 48 49 50 69 95 178
13 373 370 206 87 129 57 64 46 49 74 87 122
14 600 477 209 132 115 55 70 47 45 77 96 148
15 534 434 298 106 98 59 50 48 67 68 87 186
16 510 522 232 90 96 84 46 63 51 68 117 236
17 446 722 237 90 89 56 43 70 51 107 111 152
18 477 491 187 98 95 58 42 51 54 86 103 200
19 330 833 197 76 90 57 45 65 56 77 105 254
20 394 892 234 141 84 57 47 84 55 171 135 183
21 262 872 310 110 80 58 50 65 54 72 184 214
22 283 719 265 100 98 59 48 48 63 106 142 266
23 261 705 214 90 88 55 45 49 55 79 197 144
24 363 715 189 75 82 49 45 44 73 75 255 218
25 621 793 257 82 77 53 46 44 78 67 161 183
26 621 761 192 90 68 55 48 47 62 82 182 203
27 407 761 239 73 60 57 49 47 58 127 127 168
28 377 684 196 95 100 55 50 46 60 69 187 240
29 228 67 128 99 65 51 51 47 71 73 197 305
30 160   99 104 71 48 50 49 74 115 240 145
31 230   133   71   49 49   72   172