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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 -> 2019-09-30)

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
1 135 114 84 66 136 972 134 20 80 62 453 73
2 183 109 80 81 115 1,060 123 17 74 60 246 68
3 433 98 78 76 132 940 117 10 72 58 175 88
4 306 103 77 70 879 773 111 7.3 53 59 147 105
5 235 104 85 65 310 687 104 6.5 45 52 131 112
6 199 98 82 62 214 589 97 6.0 41 49 125 116
7 186 93 81 89 190 516 92 6.1 39 46 131 133
8 174 85 79 80 613 465 89 5.3 33 43 137 198
9 160 91 81 68 1,030 419 88 4.8 182 42 142 162
10 151 84 105 58 412 382 84 4.5 170 40 138 148
11 146 79 106 69 337 339 79 4.1 74 39 137 142
12 148 78 107 206 310 307 76 3.9 48 38 127 138
13 144 76 107 100 298 280 73 3.6 20 38 121 156
14 138 79 110 86 380 327 72 4.1 11 35 104 180
15 132 84 102 76 313 298 68 17 9.0 31 97 158
16 155 80 100 68 418 243 66 114 7.8 51 92 144
17 181 77 99 68 1,050 233 63 93 27 90 91 140
18 213 74 99 137 946 217 59 76 39 75 85 129
19 223 73 104 128 1,060 223 53 51 14 67 80 137
20 200 199 99 122 824 216 45 44 8.7 73 69 127
21 182 175 97 99 482 203 40 89 7.3 73 58 120
22 136 120 95 146 426 249 38 81 63 66 53 116
23 141 112 90 110 389 212 37 73 97 65 52 114
24 143 107 95 96 12,100 185 36 63 67 66 52 115
25 136 92 91 135 1,280 185 35 57 55 85 48 110
26 127 91 83 149 2,410 171 41 70 324 93 48 109
27 126 89 78 148 837 168 56 203 202 72 49 258
28 126 85 151 143 817 175 46 174 96 66 51 266
29 126 14 151 133 1,080 202 31 113 75 61 79 168
30 119   116 137 786 155 28 100 66 12,100 84 150
31 115   97   837   26 89   1,130   144