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USGS Daily Statistics for Texas

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Explore Real-time Water Data Using New Products from USGS TXWSC

View over 750 USGS real-time stream, lake, reservoir, precipitation, and groundwater stations in context with current weather and hazard conditions on both desktop and mobile devices.

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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 08171350 Blanco Rv at San Marcos, TX


Hays County, Texas
Hydrologic Unit Code 12100203
Latitude  29°52'46.24", Longitude  97°54'38.71" NAD83
Drainage area 436.0  square miles
Gage datum 542.97 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 2014-10-01 -> 2020-09-30)

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
1 108 95 70 55 136 972 134 20 65 49 363 59
2 147 91 67 68 115 1,060 123 17 59 48 197 55
3 346 82 65 64 132 940 117 10 58 47 140 71
4 245 85 65 70 879 773 111 7.3 42 47 118 84
5 188 87 71 86 310 687 104 6.5 36 41 105 90
6 159 82 69 76 214 589 97 6 33 39 100 93
7 149 78 67 80 190 516 92 6.1 31 37 105 107
8 140 71 66 69 613 465 89 5.3 27 35 110 158
9 128 76 68 58 1,030 419 88 4.8 146 33 114 130
10 121 70 87 49 412 382 84 4.5 136 32 111 119
11 117 65 88 58 337 339 79 4.1 60 32 110 114
12 119 65 89 172 310 307 76 3.9 38 30 102 111
13 115 63 89 83 298 280 73 3.6 17 30 97 125
14 111 66 92 72 380 327 72 4.1 8.9 28 84 144
15 106 70 85 64 313 298 68 17 7.4 25 78 126
16 124 67 84 57 418 243 66 114 6.5 41 74 115
17 145 64 83 57 1,050 233 63 93 22 72 73 112
18 170 62 82 114 946 217 59 76 31 60 68 104
19 179 61 86 107 1,060 223 53 51 12 54 64 110
20 160 166 82 102 824 216 45 44 7.1 59 56 101
21 145 146 81 82 482 203 40 72 6 59 47 96
22 113 100 79 122 426 249 38 65 50 53 43 93
23 117 94 75 92 389 212 37 59 78 52 42 91
24 120 89 79 80 12,100 185 36 50 53 54 42 92
25 113 77 76 113 1,280 185 35 46 44 70 39 88
26 106 76 69 124 2,410 171 41 56 260 75 38 87
27 105 74 65 123 837 168 56 163 161 58 40 207
28 105 71 126 143 817 175 46 140 77 53 41 213
29 105 7.3 126 133 1,080 202 31 91 60 49 64 135
30 99   97 137 786 155 28 80 53 9,700 67 120
31 96   81   837   26 71   902   116