Reservoir · Washington · United States · USGS NWIS
WYNOOCHEE LAKE NEAR GRISDALE, WA
48.8% full
Capacity
85.61 hm³
Volume stored
42 hm³
Coordinates
47.385°N, 123.606°W
Last updated
2026-07-28
Current fill
48.8%vs 7 days ago
-0.4%losing
vs 1 year ago
-20.9%year-over-year
7-day trend
→stable
Data source: USGS National Water Information System (NWIS) — daily reservoir storage volume. Capacity is the design (normal full-pool) capacity from the US National Inventory of Dams (NID); fill % = current volume ÷ design capacity. Last reading: 2026-07-28.
Catchment Weather
Past 30 days + 14-day forecast · Open-Meteo
Satellite imagery: Esri, Maxar, Earthstar Geographics. Map: Esri, HERE, Garmin, © OpenStreetMap contributors. 47.385, -123.606 · Open in Google Maps
About WYNOOCHEE LAKE NEAR GRISDALE, WA
As of July 28, 2026, WYNOOCHEE LAKE NEAR GRISDALE, WA is filled to 48.8% of its total capacity, holding roughly 42 hm³ of water out of a maximum 86 hm³. At this level the reservoir is within its normal operating range.
Over the most recent week on record the fill level has held broadly steady (-0.4 pts), and it is 20.9 points below its level on the same date a year earlier.
Across the readings we hold for WYNOOCHEE LAKE NEAR GRISDALE, WA — 1457 data points between July 30, 2022 and July 28, 2026 — the level has ranged from a low of 26.5% (October 23, 2025) to a high of 99.8% (June 11, 2024). On average the reservoir is fullest around May and at its lowest around October.
It is operated by USGS primarily for multiple purposes. It lies within the Washington basin at 47.385°N, 123.606°W.
Key facts
- Current fill level
- 48.8%
- Water stored
- 42 hm³
- Total capacity
- 86 hm³
- 7-day change
- ▼ 0.4 pts
- Year-on-year
- ▼ 20.9 pts
- Primary use
- Multipurpose
- River basin
- Washington
- Operator
- USGS
- Coordinates
- 47.385°N, 123.606°W
- Last updated
- July 28, 2026
Recent readings
| Date | Fill level | Volume (hm³) |
|---|---|---|
| 28 Jul 2026 | 48.8% | 42 |
| 27 Jul 2026 | 49.2% | 42 |
| 26 Jul 2026 | 49.5% | 42 |
| 25 Jul 2026 | 49.8% | 43 |
| 24 Jul 2026 | 50.3% | 43 |
| 23 Jul 2026 | 50.8% | 44 |
| 22 Jul 2026 | 51.3% | 44 |
| 21 Jul 2026 | 51.9% | 44 |
| 20 Jul 2026 | 52.3% | 45 |
| 19 Jul 2026 | 52.8% | 45 |
| 18 Jul 2026 | 53.2% | 46 |
| 17 Jul 2026 | 53.7% | 46 |
Frequently asked questions
What is the current water level of WYNOOCHEE LAKE NEAR GRISDALE, WA?
As of July 28, 2026, WYNOOCHEE LAKE NEAR GRISDALE, WA is at 48.8% of its capacity, holding approximately 42 hm³ of water, according to USGS NWIS data.
Is WYNOOCHEE LAKE NEAR GRISDALE, WA reservoir full?
No. As of July 28, 2026, WYNOOCHEE LAKE NEAR GRISDALE, WA is within its normal operating range at 48.8% of its capacity, so it is not full.
Is the water level at WYNOOCHEE LAKE NEAR GRISDALE, WA rising or falling?
The level at WYNOOCHEE LAKE NEAR GRISDALE, WA has been broadly stable over the latest week on record (-0.4 points).
How much water can WYNOOCHEE LAKE NEAR GRISDALE, WA hold?
WYNOOCHEE LAKE NEAR GRISDALE, WA has a total capacity of 86 hm³.
Where is WYNOOCHEE LAKE NEAR GRISDALE, WA reservoir located?
WYNOOCHEE LAKE NEAR GRISDALE, WA is located in Washington, United States, within the Washington basin (coordinates 47.385°N, 123.606°W).
What is WYNOOCHEE LAKE NEAR GRISDALE, WA used for?
WYNOOCHEE LAKE NEAR GRISDALE, WA is used primarily for multiple purposes, and is managed by USGS.