Big Lost River Bl Mackay Res Nr Mackay ID
Custer County, Idaho · USGS 13127000
Latest observation
What this gauge represents: This gauge measures conditions on Big Lost River Bl Mackay Res at its USGS monitoring location in Custer County; conditions elsewhere on the waterway may differ.
Observed · 44 minutes ago
Observed
How to read these numbers
How much water moves past the gauge each second. Higher numbers mean more water is moving downstream.
The water-surface height at this gauge. It is useful for tracking rises, falls and flood thresholds, but it is not the river's total depth.
How much the latest reading has risen or fallen compared with roughly 24 hours earlier.
The typical streamflow for this date based on USGS historical statistics. A multiple such as 3× means current flow is about three times the historical median.
Get Water Data's plain-language summary of current flow, historical context and recent direction.
Official action and flood thresholds where available. These levels are specific to each gauge location.
Gauge height and flood stage are station-specific. A 12-foot reading at one gauge should not be directly compared with 12 feet at another.
Above historical median · Steady
Streamflow is currently 261 ft³/s, 40% above the historical median for this date. Flow has been relatively steady over the past 24 hours.
USGS-reported historical daily median for 09-27: 187 ft³/s · Based on USGS day-of-year statistics
How trends & context are calculated →Streamflow trend
Daily mean streamflow · Aug 28–Sep 25 · dates shown in UTC · 29 observations
Look at the data (29 rows)
| Date (UTC) | Daily mean |
|---|---|
| Aug 28, 2026, 12:00 AM | 318 CFS |
| Aug 29, 2026, 12:00 AM | 316 CFS |
| Aug 30, 2026, 12:00 AM | 316 CFS |
| Aug 31, 2026, 12:00 AM | 316 CFS |
| Sep 1, 2026, 12:00 AM | 315 CFS |
| Sep 2, 2026, 12:00 AM | 315 CFS |
| Sep 3, 2026, 12:00 AM | 317 CFS |
| Sep 4, 2026, 12:00 AM | 315 CFS |
| Sep 5, 2026, 12:00 AM | 315 CFS |
| Sep 6, 2026, 12:00 AM | 313 CFS |
| Sep 7, 2026, 12:00 AM | 310 CFS |
| Sep 8, 2026, 12:00 AM | 306 CFS |
| Sep 9, 2026, 12:00 AM | 306 CFS |
| Sep 10, 2026, 12:00 AM | 297 CFS |
| Sep 11, 2026, 12:00 AM | 287 CFS |
| Sep 12, 2026, 12:00 AM | 287 CFS |
| Sep 13, 2026, 12:00 AM | 287 CFS |
| Sep 14, 2026, 12:00 AM | 285 CFS |
| Sep 15, 2026, 12:00 AM | 280 CFS |
| Sep 16, 2026, 12:00 AM | 272 CFS |
| Sep 17, 2026, 12:00 AM | 266 CFS |
| Sep 18, 2026, 12:00 AM | 261 CFS |
| Sep 19, 2026, 12:00 AM | 255 CFS |
| Sep 20, 2026, 12:00 AM | 253 CFS |
| Sep 21, 2026, 12:00 AM | 263 CFS |
| Sep 22, 2026, 12:00 AM | 266 CFS |
| Sep 23, 2026, 12:00 AM | 265 CFS |
| Sep 24, 2026, 12:00 AM | 265 CFS |
| Sep 25, 2026, 12:00 AM | 263 CFS |
About this gauge
Official USGS station
Get Water Data organizes provisional public monitoring data from the U.S. Geological Survey.
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