CNRFC - Hydrology - River Guidance - Tabular Data

*** IMPORTANT *** Week of June 16 - Website Data Outage - Due to a major computer upgrade the week of June 16, nearly all data on the CNRFC web site will not be updated. We anticipate the down time to be approximately 4 days. The latest deterministic hydrologic forecasts for official forecast points will continue to be available at the National Water Prediction Service during this time.

Location:

# NOTE 1: # NOTE 2: # NOTE 3: # NOTE 4:

KLAMATHRUSNAPSOUTHBAYSALINASSOCALSANDIEGOUPRSACLWRSACFTHRYUBAAMERICANCAPUTAHTULARESANJOAQNSANJOAQESIERRAHUMBOLDT = window.location.search; = new URLSearchParams(queryString); = window.location.href.split('?')[0] + "?" + urlParams.toString(); class="head">MERCED RIVER - YOSEMITE NP AT HAPPY ISLES (HPIC1)
Latitude: 37.73º N Longitude: 119.56º W Elevation: 4017 Feet
Location: Mariposa County in California Bulletin Group: San Joaquin River Group: San Joaquin
Issuance Time: Jun 16 2025 at 6:03 AM PDT Next Issuance: Jun 17 2025 at 9:00 AM PDT width="16%">
Action/Monitor: N/A Minor Flood: 7.5 Feet Moderate Flood: 10.0 Feet Major Flood: 13.27 Feet

# Tabular Observed and Forecast Hydrograph Information River - Yosemite NP at Happy Isles (HPIC1) 06/16/2025 at 06:03 AM PDT Date & Time of Maximum Observed: 06/11/2025 at 09:00 AM PDT 4.26 Feet 930 cfs & Time of Maximum Forecast: 06/19/2025 at 04:00 AM PDT 3.47 Feet 541 cfs Stage (Feet) Flow (cfs) Trend Observed Status ------------------------------------------------------------- 4.22 907 Normal 4.23 913 + Normal 4.23 913 0 Normal 4.26 930 + Normal 4.24 918 - Normal 4.20 896 - Normal 4.17 880 - Normal 4.17 880 0 Normal 4.11 847 - Normal 4.11 847 0 Normal 4.09 836 - Normal 4.02 799 - Normal 3.97 774 - Normal 3.96 769 - Normal 3.93 753 - Normal 3.89 733 - Normal 3.88 728 - Normal 3.87 724 - Normal 3.88 728 + Normal 3.90 738 + Normal 3.89 733 - Normal 3.89 733 0 Normal 3.88 728 - Normal 3.88 728 0 Normal 3.89 733 + Normal 3.90 738 + Normal 3.90 738 0 Normal 3.89 733 - Normal 3.84 709 - Normal 3.89 733 + Normal 3.89 733 0 Normal 3.88 728 - Normal 3.83 704 - Normal 3.79 685 - Normal 3.76 671 - Normal 3.76 671 0 Normal 3.72 652 - Normal 3.71 647 - Normal 3.66 624 - Normal 3.65 620 - Normal 3.65 620 0 Normal 3.64 615 - Normal 3.62 606 - Normal 3.60 597 - Normal 3.63 611 + Normal 3.60 597 - Normal 3.62 606 + Normal 3.62 606 0 Normal 3.61 602 - Normal 3.60 597 - Normal 3.63 611 + Normal 3.63 611 0 Normal 3.60 597 - Normal 3.61 602 + Normal 3.59 593 - Normal 3.58 589 - Normal 3.58 589 0 Normal 3.56 580 - Normal 3.55 576 - Normal 3.49 550 - Normal 3.51 558 + Normal 3.48 546 - Normal 3.46 537 - Normal 3.44 529 - Normal 3.46 537 + Normal 3.43 525 - Normal 3.43 525 0 Normal 3.41 517 - Normal 3.43 525 + Normal 3.41 517 - Normal 3.43 525 + Normal 3.39 508 - Normal 3.42 521 + Normal 3.43 525 + Normal 3.44 529 + Normal 3.42 521 - Normal 3.42 521 0 Normal 3.42 521 0 Normal 3.42 521 0 Normal 3.40 513 - Normal 3.36 496 - Normal 3.37 500 + Normal 3.39 508 + Normal 3.33 485 - Normal 3.31 477 - Normal 3.32 481 + Normal 3.29 469 - Normal 3.27 461 - Normal 3.30 473 + Normal 3.26 457 - Normal 3.26 457 0 Normal 3.26 457 0 Normal 3.26 457 0 Normal 3.27 461 + Normal 3.27 461 0 Normal 3.27 461 0 Normal 3.27 461 0 Normal 3.28 465 + Normal 3.28 465 0 Normal 3.28 465 0 Normal 3.28 465 0 Normal 3.25 454 - Normal 3.28 465 + Normal 3.27 461 - Normal 3.25 454 - Normal 3.24 450 - Normal 3.23 446 - Normal 3.22 442 - Normal 3.19 431 - Normal 3.18 427 - Normal 3.18 427 0 Normal 3.16 420 - Normal 3.14 413 - Normal 3.14 413 0 Normal 3.15 416 + Normal 3.14 413 - Normal 3.15 416 + Normal 3.15 416 0 Normal 3.15 416 0 Normal 3.16 420 + Normal Stage (Feet) Flow (cfs) Trend Forecast Status ------------------------------------------------------------- 3.17 424 Normal 3.18 427 + Normal 3.18 427 0 Normal 3.19 431 + Normal 3.19 431 0 Normal 3.19 431 0 Normal 3.19 431 0 Normal 3.20 435 + Normal 3.19 431 - Normal 3.20 435 + Normal 3.21 439 + Normal 3.20 435 - Normal 3.21 439 + Normal 3.22 442 + Normal 3.24 450 + Normal 3.25 454 + Normal 3.25 454 0 Normal 3.26 457 + Normal 3.26 457 0 Normal 3.26 457 0 Normal 3.26 457 0 Normal 3.27 461 + Normal 3.26 457 - Normal 3.26 457 0 Normal 3.25 454 - Normal 3.24 450 - Normal 3.23 446 - Normal 3.21 439 - Normal 3.20 435 - Normal 3.19 431 - Normal 3.17 424 - Normal 3.16 420 - Normal 3.15 416 - Normal 3.14 413 - Normal 3.13 409 - Normal 3.13 409 0 Normal 3.15 416 + Normal 3.16 420 + Normal 3.19 431 + Normal 3.21 439 + Normal 3.23 446 + Normal 3.25 454 + Normal 3.26 457 + Normal 3.27 461 + Normal 3.29 469 + Normal 3.30 473 + Normal 3.31 477 + Normal 3.32 481 + Normal 3.33 485 + Normal 3.32 481 - Normal 3.31 477 - Normal 3.31 477 0 Normal 3.30 473 - Normal 3.30 473 0 Normal 3.28 465 - Normal 3.28 465 0 Normal 3.26 457 - Normal 3.26 457 0 Normal 3.26 457 0 Normal 3.26 457 0 Normal 3.28 465 + Normal 3.31 477 + Normal 3.35 492 + Normal 3.37 500 + Normal 3.40 513 + Normal 3.42 521 + Normal 3.43 525 + Normal 3.44 529 + Normal 3.45 533 + Normal 3.46 537 + Normal 3.47 541 + Normal 3.47 541 0 Normal 3.46 537 - Normal 3.44 529 - Normal 3.42 521 - Normal 3.41 517 - Normal 3.39 508 - Normal 3.38 504 - Normal 3.35 492 - Normal 3.34 488 - Normal 3.31 477 - Normal 3.30 473 - Normal 3.29 469 - Normal 3.28 465 - Normal 3.30 473 + Normal 3.31 477 + Normal 3.33 485 + Normal 3.34 488 + Normal 3.35 492 + Normal 3.36 496 + Normal 3.36 496 0 Normal 3.36 496 0 Normal 3.35 492 - Normal 3.35 492 0 Normal 3.35 492 0 Normal 3.34 488 - Normal 3.32 481 - Normal 3.30 473 - Normal 3.29 469 - Normal 3.27 461 - Normal 3.25 454 - Normal 3.23 446 - Normal 3.21 439 - Normal 3.19 431 - Normal 3.17 424 - Normal 3.15 416 - Normal 3.15 416 0 Normal 3.14 413 - Normal 3.14 413 0 Normal 3.15 416 + Normal 3.17 424 + Normal 3.17 424 0 Normal 3.18 427 + Normal 3.19 431 + Normal 3.19 431 0 Normal 3.19 431 0 Normal 3.19 431 0 Normal 3.19 431 0 Normal 3.18 427 - Normal 3.18 427 0 Normal Stages are rounded to the nearest hundredth (.01) of a foot. Flows are rounded to the nearest (1) cfs. Trends are determined using hourly change in unrounded stage and flow. Maximum Values are determined using unrounded stage and flow. End Web Content -->
communication-links"> class ="two-third-first nopad">