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USGS Daily Statistics for Texas

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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 08183500 San Antonio Rv nr Falls City, TX


Karnes County, Texas
Hydrologic Unit Code 12100303
Latitude  28°57'05", Longitude  98°03'50" NAD27
Drainage area 2,113  square miles
Contributing drainage area 2,113  square miles
Gage datum 285.26 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 1924-10-01 -> 2025-09-30)

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
1 392 395 376 435 544 751 605 280 444 535 479 351
2 380 400 384 394 537 858 612 277 431 394 518 342
3 363 436 381 381 557 894 657 293 371 348 463 349
4 377 515 381 390 541 905 740 312 341 350 457 374
5 380 630 403 393 531 941 859 337 374 365 519 426
6 375 651 462 443 542 818 1,060 358 417 478 583 442
7 370 566 447 483 576 838 1,110 373 452 468 523 426
8 367 491 424 465 544 801 986 347 464 395 409 394
9 348 439 382 441 533 656 794 341 555 405 379 376
10 373 418 379 386 585 598 616 353 651 460 418 366
11 400 436 385 366 586 670 511 361 614 513 412 350
12 412 430 377 365 569 778 460 293 550 431 396 342
13 397 444 414 354 557 796 432 268 459 421 355 342
14 382 446 449 363 618 825 392 264 400 428 346 365
15 373 410 444 365 720 819 371 265 495 412 350 378
16 408 421 425 383 614 795 381 283 440 419 350 407
17 411 398 454 390 661 702 434 325 449 450 400 404
18 409 389 427 436 640 641 504 410 523 444 436 356
19 440 409 400 504 586 653 605 501 504 646 461 347
20 542 437 385 547 617 620 610 497 441 960 491 383
21 559 438 441 561 699 572 521 467 455 810 434 441
22 531 486 413 602 654 543 443 347 513 530 405 491
23 516 499 385 627 604 540 415 312 491 443 420 551
24 489 519 373 547 624 553 407 346 513 513 556 547
25 447 504 379 539 670 562 404 320 525 608 520 461
26 467 458 359 583 748 622 420 343 446 749 467 390
27 472 457 368 622 771 718 439 305 506 688 420 360
28 457 418 416 593 794 696 412 309 782 519 396 377
29 443 380 432 558 795 522 366 356 1,050 431 403 404
30 406   434 555 765 500 345 358 783 416 401 394
31 405   448   756   301 438   445   378