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Hydrograph River at a Glance Download
Eastern Idaho Reservoirs at Mackay Dam Pool (ft)Observed: 56.87 ft at 12:30PM Apr 19, 2021Observed: 56.87 ft at 12:45PM Apr 19, 2021Observed: 56.87 ft at 1:00PM Apr 19, 2021Observed: 56.91 ft at 1:15PM Apr 19, 2021Observed: 56.88 ft at 1:30PM Apr 19, 2021Observed: 56.89 ft at 1:45PM Apr 19, 2021Observed: 56.89 ft at 2:00PM Apr 19, 2021Observed: 56.87 ft at 2:15PM Apr 19, 2021Observed: 56.93 ft at 2:30PM Apr 19, 2021Observed: 56.88 ft at 2:45PM Apr 19, 2021Observed: 56.87 ft at 3:00PM Apr 19, 2021Observed: 56.88 ft at 3:30PM Apr 19, 2021Observed: 56.85 ft at 4:00PM Apr 19, 2021Observed: 56.85 ft at 4:15PM Apr 19, 2021Observed: 56.86 ft at 4:30PM Apr 19, 2021Observed: 56.89 ft at 4:45PM Apr 19, 2021Observed: 56.88 ft at 5:00PM Apr 19, 2021Observed: 56.91 ft at 5:15PM Apr 19, 2021Observed: 56.9 ft at 5:30PM Apr 19, 2021Observed: 56.89 ft at 5:45PM Apr 19, 2021Observed: 56.91 ft at 6:00PM Apr 19, 2021Observed: 56.88 ft at 6:15PM Apr 19, 2021Observed: 56.9 ft at 6:30PM Apr 19, 2021Observed: 56.87 ft at 6:45PM Apr 19, 2021Observed: 56.87 ft at 7:00PM Apr 19, 2021Observed: 56.86 ft at 7:30PM Apr 19, 2021Observed: 56.85 ft at 7:45PM Apr 19, 2021Observed: 56.87 ft at 8:00PM Apr 19, 2021Observed: 56.87 ft at 8:15PM Apr 19, 2021Observed: 56.88 ft at 8:30PM Apr 19, 2021Observed: 56.86 ft at 8:45PM Apr 19, 2021Observed: 56.89 ft at 9:00PM Apr 19, 2021Observed: 56.88 ft at 9:15PM Apr 19, 2021Observed: 56.87 ft at 9:30PM Apr 19, 2021Observed: 56.87 ft at 9:45PM Apr 19, 2021Observed: 56.89 ft at 10:00PM Apr 19, 2021Observed: 56.87 ft at 10:30PM Apr 19, 2021Observed: 56.87 ft at 10:45PM Apr 19, 2021Observed: 56.88 ft at 11:15PM Apr 19, 2021Observed: 56.87 ft at 11:30PM Apr 19, 2021Observed: 56.88 ft at 11:45PM Apr 19, 2021Observed: 56.88 ft at 12:00AM Apr 20, 2021Observed: 56.88 ft at 12:15AM Apr 20, 2021Observed: 56.87 ft at 12:30AM Apr 20, 2021Observed: 56.88 ft at 12:45AM Apr 20, 2021Observed: 56.86 ft at 1:15AM Apr 20, 2021Observed: 56.87 ft at 1:30AM Apr 20, 2021Observed: 56.88 ft at 1:45AM Apr 20, 2021Observed: 56.87 ft at 2:15AM Apr 20, 2021Observed: 56.87 ft at 2:30AM Apr 20, 2021Observed: 56.88 ft at 2:45AM Apr 20, 2021Observed: 56.88 ft at 3:00AM Apr 20, 2021Observed: 56.87 ft at 3:30AM Apr 20, 2021Observed: 56.87 ft at 3:45AM Apr 20, 2021Observed: 56.87 ft at 4:00AM Apr 20, 2021Observed: 56.87 ft at 4:30AM Apr 20, 2021Observed: 56.88 ft at 5:30AM Apr 20, 2021Observed: 56.88 ft at 6:00AM Apr 20, 2021Observed: 56.88 ft at 6:15AM Apr 20, 2021Observed: 56.88 ft at 7:00AM Apr 20, 2021Observed: 56.88 ft at 7:15AM Apr 20, 2021Observed: 56.87 ft at 7:45AM Apr 20, 2021Observed: 56.89 ft at 12:45PM Apr 20, 2021Observed: 56.89 ft at 1:15PM Apr 20, 2021Observed: 56.9 ft at 2:00PM Apr 20, 2021Observed: 56.89 ft at 2:15PM Apr 20, 2021Observed: 56.89 ft at 3:45PM Apr 20, 2021Observed: 56.9 ft at 5:30PM Apr 20, 2021Observed: 56.9 ft at 5:45PM Apr 20, 2021Observed: 56.9 ft at 6:00PM Apr 20, 2021Observed: 56.91 ft at 6:15PM Apr 20, 2021Observed: 56.9 ft at 8:00PM Apr 20, 2021Observed: 56.9 ft at 8:15PM Apr 20, 2021Observed: 56.9 ft at 9:45PM Apr 20, 2021Observed: 56.91 ft at 10:00PM Apr 20, 2021Observed: 56.91 ft at 12:45AM Apr 21, 2021Observed: 56.91 ft at 1:15AM Apr 21, 2021Observed: 56.92 ft at 1:30AM Apr 21, 2021Observed: 56.91 ft at 2:15AM Apr 21, 2021Observed: 56.92 ft at 3:30AM Apr 21, 2021Observed: 56.92 ft at 3:45AM Apr 21, 2021Observed: 56.93 ft at 4:15AM Apr 21, 2021Observed: 56.93 ft at 4:45AM Apr 21, 2021Observed: 56.93 ft at 5:15AM Apr 21, 2021Observed: 56.93 ft at 5:30AM Apr 21, 2021Observed: 56.93 ft at 5:45AM Apr 21, 2021Observed: 56.93 ft at 6:15AM Apr 21, 2021Observed: 56.92 ft at 6:45AM Apr 21, 2021Observed: 56.93 ft at 8:15AM Apr 21, 2021Observed: 56.94 ft at 10:45AM Apr 21, 2021Observed: 56.94 ft at 11:15AM Apr 21, 2021Observed: 56.94 ft at 12:00PM Apr 21, 2021Observed: 56.94 ft at 12:15PM Apr 21, 2021Observed: 56.94 ft at 12:30PM Apr 21, 2021Observed: 56.94 ft at 1:15PM Apr 21, 2021Observed: 56.93 ft at 1:30PM Apr 21, 2021Observed: 56.94 ft at 1:45PM Apr 21, 2021Observed: 56.95 ft at 2:00PM Apr 21, 2021Observed: 56.94 ft at 2:15PM Apr 21, 2021Observed: 56.94 ft at 2:30PM Apr 21, 2021Observed: 56.94 ft at 3:00PM Apr 21, 2021Observed: 56.95 ft at 5:30PM Apr 21, 2021Observed: 56.95 ft at 5:45PM Apr 21, 2021Observed: 56.96 ft at 6:30PM Apr 21, 2021Observed: 56.95 ft at 6:45PM Apr 21, 2021Observed: 56.96 ft at 8:00PM Apr 21, 2021Observed: 56.95 ft at 8:15PM Apr 21, 2021Observed: 56.96 ft at 8:30PM Apr 21, 2021Observed: 56.95 ft at 9:30PM Apr 21, 2021Observed: 56.96 ft at 11:45PM Apr 21, 2021Observed: 56.95 ft at 12:00AM Apr 22, 2021Observed: 56.96 ft at 12:30AM Apr 22, 2021Observed: 56.96 ft at 1:15AM Apr 22, 2021Observed: 56.96 ft at 1:45AM Apr 22, 2021Observed: 56.97 ft at 2:15AM Apr 22, 2021Observed: 56.97 ft at 2:30AM Apr 22, 2021Observed: 56.97 ft at 2:45AM Apr 22, 2021Observed: 56.97 ft at 3:00AM Apr 22, 2021Observed: 56.97 ft at 3:15AM Apr 22, 2021Observed: 56.97 ft at 4:15AM Apr 22, 2021Observed: 56.97 ft at 4:30AM Apr 22, 2021Observed: 56.97 ft at 4:45AM Apr 22, 2021Observed: 56.97 ft at 5:15AM Apr 22, 2021Observed: 56.97 ft at 5:30AM Apr 22, 2021Observed: 56.97 ft at 5:45AM Apr 22, 2021Observed: 56.97 ft at 6:00AM Apr 22, 2021Observed: 56.97 ft at 6:30AM Apr 22, 2021Observed: 56.98 ft at 6:45AM Apr 22, 2021Observed: 56.98 ft at 7:00AM Apr 22, 2021Observed: 56.98 ft at 7:30AM Apr 22, 2021Observed: 56.98 ft at 7:45AM Apr 22, 2021Highest Observation: 56.99 ft at 8:45AM Apr 22, 2021Observed: 56.98 ft at 9:15AM Apr 22, 2021Forecast: 57 ft 6:00PM Apr 22, 2021Forecast: 57.02 ft 12:00AM Apr 23, 2021Forecast: 57.04 ft 6:00AM Apr 23, 2021Forecast: 57.06 ft 12:00PM Apr 23, 2021Forecast: 57.07 ft 6:00PM Apr 23, 2021Forecast: 57.09 ft 12:00AM Apr 24, 2021Forecast: 57.11 ft 6:00AM Apr 24, 2021Forecast: 57.13 ft 12:00PM Apr 24, 2021Forecast: 57.15 ft 6:00PM Apr 24, 2021Forecast: 57.16 ft 12:00AM Apr 25, 2021Forecast: 57.18 ft 6:00AM Apr 25, 2021Forecast: 57.21 ft 12:00PM Apr 25, 2021Forecast: 57.23 ft 6:00PM Apr 25, 2021Forecast: 57.25 ft 12:00AM Apr 26, 2021Forecast: 57.26 ft 6:00AM Apr 26, 2021Forecast: 57.28 ft 12:00PM Apr 26, 2021Forecast: 57.3 ft 6:00PM Apr 26, 2021Forecast: 57.32 ft 12:00AM Apr 27, 2021Forecast: 57.34 ft 6:00AM Apr 27, 2021Forecast: 57.35 ft 12:00PM Apr 27, 2021Forecast: 57.37 ft 6:00PM Apr 27, 2021Forecast: 57.39 ft 12:00AM Apr 28, 2021Forecast: 57.4 ft 6:00AM Apr 28, 2021Forecast: 57.42 ft 12:00PM Apr 28, 2021Forecast: 57.44 ft 6:00PM Apr 28, 2021Forecast: 57.45 ft 12:00AM Apr 29, 2021Forecast: 57.47 ft 6:00AM Apr 29, 2021Highest Forecast: 57.49 ft 12:00PM Apr 29, 2021MACI1(plotting HPIRZ) Graph Created (12:18PM Apr 22, 2021)ObservedForecast (issued 9:27AM Apr 22)Latest observed value: 56.98 ft at 9:15 AM MDT 22-Apr-2021.
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About this graph
Tabular Data (UTC)
Tabular Data (MDT)
XML Data
RSS Files
Datum: NGVD29
Metadata
NOTE: Forecasts are not available for the Eastern Idaho Reservoirs at Mackay Dam. Only observed stages are available for this point.
Return to Area Map
Upstream Gauge - at Howell Ranch Upstream Gauge Downstream Gauge Downstream Gauge - below Mackay Reservoir
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 0
Action Stage: 65.7
Low Stage (in feet): -9999

Historic Crests

(P): Preliminary values subject to further review.

Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
Zoom Level:16
KML Image
Gauge LocationGauge Map Marker
 Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.
Flood Impacts & Photos Collapse
If you notice any errors in the below information, please contact our Webmaster
66.5 102 percent Full Maximum Level
65.7 100 percent Full
64.8 97 percent Full
64.2 95 percent Full
63.2 92 percent Full
61.5 90 percent Full
60.8 87 percent Full
About This Location Collapse

Latitude: 43.951670° N, Longitude: 113.674720° W, Horizontal Datum: NAD83/WGS84

River Stage
Reference Frame		 Gauge Height Flood Stage Uses
NWS stage 0 ft Not Available Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum Elevation
(gauge height = 0)		 Elevation
(gauge height = flood stage)		 Elevation information source
NAVD88 Not Available Not Available Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29 6000.4 Not Available Older USGS topographic maps, NGVD29 benchmarks
MSL Not Available Not Available Older USGS topographic maps, MSL benchmarks
Other Not Available Not Available  

Current/Historical Observations:
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Collaborative Agencies Collapse
The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.
NWS Information
National Weather Service
Pocatello Weather Forecast Office
1945 Beechcraft Ave
Pocatello, ID 83204
(208) 232-9306
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