Skip Navigation Link weather.gov  
NOAA logo - Click to go to the NOAA homepage National Weather Service NWS logo - Click to go to the NWS homepage
Advanced Hydrologic Prediction Service
Image background of Navigation bar Left Home News Organization
Navigation Bar End Cap

  

National Conditions
    Rivers
    Satellite
    Climate
    Observed Precip

Local Conditions
    Warnings
    Weather Forecast
    Pocatello Radar
    Salt Lake City Radar
    Boise Radar

AHPS Documentation
    User Guide
    User Brochure

What is AHPS?
    Facts
    Our Partners

Feedback/Questions
    Provide Feedback
    Ask Questions

When flooded turn around don't drown
FloodSmart
USA.gov Official Web Portal
 

This probabilistic forecast is issued by the Northwest River Forecast Center.
tab left off Hydrograph tab right off tab left off River at a Glance tab right off tab left off Download tab right off tab left on tab right on
About this graph
Forecasts for the Big Lost River at Howell Ranch are issued routinely year-round.
Return to Area Map

Downstream Gauge Downstream Gauge - at Mackay Dam
Zoom Level:16
Flood Categories (in feet)
Major Flood Stage: 0
Moderate Flood Stage: 0
Flood Stage: 4
Action Stage: 3.51
Low Stage (in feet): -9999

Historic Crests
(1) 6.02 ft on 05/25/1967
(2) 6.00 ft on 06/26/1954
(3) 5.94 ft on 06/12/1921
(4) 5.73 ft on 06/12/1965
(5) 5.68 ft on 05/21/2006
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 3.42 ft on 05/31/2020 (P)
(2) 4.40 ft on 06/07/2019
(3) 4.15 ft on 05/26/2018
(4) 5.27 ft on 06/05/2017
(5) 4.01 ft on 06/06/2016
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.
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
4.05 or 2254 cfs... Widespread lowland flooding from Howell Ranch downriver to the top of Mackay Reservoir. Fish Hatchery Road near Donahue Ranch may have water flowing over it. Canals and headgates may have problems.
3.51 or 1608 cfs... Near bankfull from Howell Ranch downriver to the top of Mackay Reservoir. Some lowland flooding of fields possible.

Other Real-time and/or Archive Data Sources:
Additional Information Collapse
Historical Peak Flows     (Scroll to Streamflow Statistics for more years)
USGS Historical Peak Flows Explanation
Graphical View of Historical Peak Flows and Gage Analysis 

25   Year Peak Flood 4130 CFS or 5.19 ft
50   Year Peak Flood 4560 CFS or 5.43 ft
100 Year Peak Flood 4960 CFS or 5.64 ft
200 Year Peak Flood 5360 CFS or 5.84 ft
500 Year Peak Flood 5850 CFS
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
Ask Questions/Webmaster
Page last modified: 7-Nov-2019 3:32 PM 		Disclaimer
Credits
Glossary 		Privacy Policy
About Us
Career Opportunities