Seasonal streamflow forecasts - Revision history

JeffreyJLukas: /* Overview */

2026-05-13T15:07:45Z

Overview

← Older revision		Revision as of 11:07, 13 May 2026
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	*Natural Resource Conservation Service (NRCS) National Water and Climate Center		*Natural Resource Conservation Service (NRCS) National Water and Climate Center

	CBRFC and NRCS use different modeling approaches and their respective forecasted streamflow volumes for the same forecast point may differ. Before 2012, they coordinated their forecasts so that their forecasted streamflow volumes were the same. CBRFC issues forecasts for 143 points within the Colorado River Basin, and also for 33 points in the eastern Great Basin. NRCS issues forecasts for 134 points within the basin, most of them overlapping with the CBRFC forecast points, and ~~also~~ for about 750 points in other western river basins.		CBRFC issues forecasts for 143 points within the Colorado River Basin, and also for 33 points in the eastern Great Basin. NRCS issues forecasts for 134 points within the basin, most of them overlapping with the CBRFC forecast points, and for about 750 points in other western river basins. CBRFC and NRCS use different modeling approaches and their respective forecasted streamflow volumes for the same forecast point may differ. (Before 2012, the two entities coordinated their forecasts, such that their forecasted streamflow volumes for shared forecast points were identical.)

	[[File:GLDA3 2020 plot.png\|thumb\|700px\|Figure 1. CBRFC forecast evolution plot showing the multiple probabilistic forecasts of April-July Lake Powell inflows that were made at each stage of the 2020 forecast season as the snowpack evolved. Image: CBRFC; Annotations: Jeff Lukas.]]		[[File:GLDA3 2020 plot.png\|thumb\|700px\|Figure 1. CBRFC forecast evolution plot showing the multiple probabilistic forecasts of April-July Lake Powell inflows that were made at each stage of the 2020 forecast season as the snowpack evolved. Image: CBRFC; Annotations: Jeff Lukas.]]

JeffreyJLukas: /* [https://data.airbornesnowobservatories.com ASO-WRF-Hydro forecasts for Colorado and Utah (ASO) */

2025-01-14T21:20:58Z

[https://data.airbornesnowobservatories.com ASO-WRF-Hydro forecasts for Colorado and Utah (ASO)

← Older revision		Revision as of 17:20, 14 January 2025
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	In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, CBRFC is producing experimental seasonal water-supply forecasts for ~20 gages in Colorado and Utah. In these forecasts--which can supplement, but do not replace, CBRFC's official forecasts for the same gages--SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June. (The 2021-23 forecasts for Colorado gages can be obtained through the embedded table in [https://coloradosnow.org/new-page this page] at CASM.) CBRFC has committed to producing the ASO-informed experimental forecasts in spring 2025.		In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, CBRFC is producing experimental seasonal water-supply forecasts for ~20 gages in Colorado and Utah. In these forecasts--which can supplement, but do not replace, CBRFC's official forecasts for the same gages--SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June. (The 2021-23 forecasts for Colorado gages can be obtained through the embedded table in [https://coloradosnow.org/new-page this page] at CASM.) CBRFC has committed to producing the ASO-informed experimental forecasts in spring 2025.

	===[https://data.airbornesnowobservatories.com ASO-WRF-Hydro forecasts for Colorado and Utah (ASO)===		===[https://data.airbornesnowobservatories.com ASO-WRF-Hydro forecasts for Colorado and Utah (ASO)]===
	Airborne Snow Observatories (ASO) also produces its own streamflow forecasts for many of the basins across the West in which it conducts flights to generate lidar-based SWE estimates. These forecasts use the WRF-Hydro hydrologic model to translate from SWE and other parameters into runoff. Typically 1-3 forecasts for each gage are produced during the spring runoff season. Free registration is required to view the ASO forecasts.		Airborne Snow Observatories (ASO) also produces its own streamflow forecasts for many of the basins across the West in which it conducts flights to generate lidar-based SWE estimates. These forecasts use the WRF-Hydro hydrologic model to translate from SWE and other parameters into runoff. Typically 1-3 forecasts for each gage are produced during the spring runoff season. Free registration is required to view the ASO forecasts.

JeffreyJLukas: /* [https://data.airbornesnowobservatories.com/ ASO-WRF-Hydro forecasts for Colorado and Utah (ASO) */

2025-01-14T21:20:46Z

[https://data.airbornesnowobservatories.com/ ASO-WRF-Hydro forecasts for Colorado and Utah (ASO)

← Older revision		Revision as of 17:20, 14 January 2025
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	In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, CBRFC is producing experimental seasonal water-supply forecasts for ~20 gages in Colorado and Utah. In these forecasts--which can supplement, but do not replace, CBRFC's official forecasts for the same gages--SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June. (The 2021-23 forecasts for Colorado gages can be obtained through the embedded table in [https://coloradosnow.org/new-page this page] at CASM.) CBRFC has committed to producing the ASO-informed experimental forecasts in spring 2025.		In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, CBRFC is producing experimental seasonal water-supply forecasts for ~20 gages in Colorado and Utah. In these forecasts--which can supplement, but do not replace, CBRFC's official forecasts for the same gages--SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June. (The 2021-23 forecasts for Colorado gages can be obtained through the embedded table in [https://coloradosnow.org/new-page this page] at CASM.) CBRFC has committed to producing the ASO-informed experimental forecasts in spring 2025.

	===[https://data.airbornesnowobservatories.com/ ASO-WRF-Hydro forecasts for Colorado and Utah (ASO)===		===[https://data.airbornesnowobservatories.com ASO-WRF-Hydro forecasts for Colorado and Utah (ASO)===
	Airborne Snow Observatories (ASO) also produces its own streamflow forecasts for many of the basins across the West in which it conducts flights to generate lidar-based SWE estimates. These forecasts use the WRF-Hydro hydrologic model to translate from SWE and other parameters into runoff. Typically 1-3 forecasts for each gage are produced during the spring runoff season. Free registration is required to view the ASO forecasts.		Airborne Snow Observatories (ASO) also produces its own streamflow forecasts for many of the basins across the West in which it conducts flights to generate lidar-based SWE estimates. These forecasts use the WRF-Hydro hydrologic model to translate from SWE and other parameters into runoff. Typically 1-3 forecasts for each gage are produced during the spring runoff season. Free registration is required to view the ASO forecasts.


	===[[Woodson Lees Ferry WY flow forecast]]===		===[[Woodson Lees Ferry WY flow forecast]]===

JeffreyJLukas: /* Data and Tools */

2025-01-14T21:20:28Z

Data and Tools

← Older revision		Revision as of 17:20, 14 January 2025
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	===''Experimental Forecasts''===		===''Experimental Forecasts''===
	===[https://www.cbrfc.noaa.gov/product/hydrofcst/hydrofcst.php ASO-informed ~~Forecasts from CBRFC:~~ Colorado and Utah]===		===[https://www.cbrfc.noaa.gov/product/hydrofcst/hydrofcst.php ASO-informed forecasts for Colorado and Utah (CBRFC)]===
	In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, CBRFC is producing experimental seasonal water-supply forecasts for ~20 gages in Colorado and Utah. In these forecasts--which can supplement, but do not replace, CBRFC's official forecasts for the same gages--SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June. (The 2021-23 forecasts for Colorado gages can be obtained through the embedded table in [https://coloradosnow.org/new-page this page] at CASM.) CBRFC has committed to producing the ASO-informed experimental forecasts in spring 2025.		In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, CBRFC is producing experimental seasonal water-supply forecasts for ~20 gages in Colorado and Utah. In these forecasts--which can supplement, but do not replace, CBRFC's official forecasts for the same gages--SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June. (The 2021-23 forecasts for Colorado gages can be obtained through the embedded table in [https://coloradosnow.org/new-page this page] at CASM.) CBRFC has committed to producing the ASO-informed experimental forecasts in spring 2025.

			===[https://data.airbornesnowobservatories.com/ ASO-WRF-Hydro forecasts for Colorado and Utah (ASO)===
			Airborne Snow Observatories (ASO) also produces its own streamflow forecasts for many of the basins across the West in which it conducts flights to generate lidar-based SWE estimates. These forecasts use the WRF-Hydro hydrologic model to translate from SWE and other parameters into runoff. Typically 1-3 forecasts for each gage are produced during the spring runoff season. Free registration is required to view the ASO forecasts.


	===[[Woodson Lees Ferry WY flow forecast]]===		===[[Woodson Lees Ferry WY flow forecast]]===

JeffreyJLukas: /* ASO-informed Forecasts from CBRFC: Colorado and Utah */

2025-01-14T21:02:32Z

ASO-informed Forecasts from CBRFC: Colorado and Utah

← Older revision		Revision as of 17:02, 14 January 2025
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	===''Experimental Forecasts''===		===''Experimental Forecasts''===
	===[https://www.cbrfc.noaa.gov/product/hydrofcst/hydrofcst.php ASO-informed Forecasts from CBRFC: Colorado and Utah]===		===[https://www.cbrfc.noaa.gov/product/hydrofcst/hydrofcst.php ASO-informed Forecasts from CBRFC: Colorado and Utah]===
	In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, CBRFC is producing experimental seasonal water-supply forecasts for ~20 gages in Colorado and Utah. In these forecasts--which can supplement, but do not replace, CBRFC's official forecasts for the same gages--SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June. (The 2021-23 forecasts can be obtained through the embedded table in [https://coloradosnow.org/new-page this page] at CASM.) CBRFC has committed to producing the ASO-informed experimental forecasts in spring 2025.		In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, CBRFC is producing experimental seasonal water-supply forecasts for ~20 gages in Colorado and Utah. In these forecasts--which can supplement, but do not replace, CBRFC's official forecasts for the same gages--SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June. (The 2021-23 forecasts for Colorado gages can be obtained through the embedded table in [https://coloradosnow.org/new-page this page] at CASM.) CBRFC has committed to producing the ASO-informed experimental forecasts in spring 2025.

	===[[Woodson Lees Ferry WY flow forecast]]===		===[[Woodson Lees Ferry WY flow forecast]]===

JeffreyJLukas: /* ASO-informed Forecasts from CBRFC: Colorado and Utah */

2025-01-14T21:02:00Z

ASO-informed Forecasts from CBRFC: Colorado and Utah

← Older revision		Revision as of 17:02, 14 January 2025
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	===''Experimental Forecasts''===		===''Experimental Forecasts''===
	===[https://www.cbrfc.noaa.gov/product/hydrofcst/hydrofcst.php ASO-informed Forecasts from CBRFC: Colorado and Utah]===		===[https://www.cbrfc.noaa.gov/product/hydrofcst/hydrofcst.php ASO-informed Forecasts from CBRFC: Colorado and Utah]===
	In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, CBRFC is producing experimental seasonal water-supply forecasts for ~20 gages in Colorado and Utah. In these forecasts--which can supplement, but do not replace, CBRFC's official forecasts for the same gages--SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June. CBRFC has committed to producing the ASO-informed experimental forecasts in spring 2025.		In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, CBRFC is producing experimental seasonal water-supply forecasts for ~20 gages in Colorado and Utah. In these forecasts--which can supplement, but do not replace, CBRFC's official forecasts for the same gages--SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June. (The 2021-23 forecasts can be obtained through the embedded table in [https://coloradosnow.org/new-page this page] at CASM.) CBRFC has committed to producing the ASO-informed experimental forecasts in spring 2025.

	===[[Woodson Lees Ferry WY flow forecast]]===		===[[Woodson Lees Ferry WY flow forecast]]===

JeffreyJLukas: /* ASO-informed Forecasts from CBRFC: Colorado and Utah */

2025-01-13T21:53:05Z

ASO-informed Forecasts from CBRFC: Colorado and Utah

← Older revision		Revision as of 17:53, 13 January 2025
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	===''Experimental Forecasts''===		===''Experimental Forecasts''===
	===[https://www.cbrfc.noaa.gov/product/hydrofcst/hydrofcst.php ASO-informed Forecasts from CBRFC: Colorado and Utah]===		===[https://www.cbrfc.noaa.gov/product/hydrofcst/hydrofcst.php ASO-informed Forecasts from CBRFC: Colorado and Utah]===
	In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, ~~the NOAA Colorado Basin River Forecast Center (~~CBRFC) is producing experimental seasonal water-supply forecasts for ~20 gages in Colorado and Utah. In these forecasts--which can supplement, but do not replace, CBRFC's official forecasts for the same gages--SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June. CBRFC has committed to producing the ASO-informed experimental forecasts in spring 2025.		In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, CBRFC is producing experimental seasonal water-supply forecasts for ~20 gages in Colorado and Utah. In these forecasts--which can supplement, but do not replace, CBRFC's official forecasts for the same gages--SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June. CBRFC has committed to producing the ASO-informed experimental forecasts in spring 2025.

	===[[Woodson Lees Ferry WY flow forecast]]===		===[[Woodson Lees Ferry WY flow forecast]]===

JeffreyJLukas: /* ASO-Informed Hydrologic Forecasts by CBRFC: Colorado and Utah */

2025-01-13T21:52:30Z

ASO-Informed Hydrologic Forecasts by CBRFC: Colorado and Utah

← Older revision		Revision as of 17:52, 13 January 2025
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	===''Experimental Forecasts''===		===''Experimental Forecasts''===
	===[https://www.cbrfc.noaa.gov/product/hydrofcst/hydrofcst.php ASO-~~Informed Hydrologic~~ Forecasts by CBRFC: Colorado and Utah]===		===[https://www.cbrfc.noaa.gov/product/hydrofcst/hydrofcst.php ASO-informed Forecasts from CBRFC: Colorado and Utah]===
	In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, the NOAA Colorado Basin River Forecast Center (CBRFC) is producing experimental seasonal water-supply forecasts for ~20 gages in Colorado and Utah. In these forecasts--which can supplement, but do not replace, CBRFC's official forecasts for the same gages--SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June. CBRFC has committed to producing the ASO-informed experimental forecasts in spring 2025.		In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, the NOAA Colorado Basin River Forecast Center (CBRFC) is producing experimental seasonal water-supply forecasts for ~20 gages in Colorado and Utah. In these forecasts--which can supplement, but do not replace, CBRFC's official forecasts for the same gages--SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June. CBRFC has committed to producing the ASO-informed experimental forecasts in spring 2025.

JeffreyJLukas: /* ASO-Assimilated Hydrologic Forecasts by CBRFC: Colorado and Utah */

2025-01-13T21:45:17Z

ASO-Assimilated Hydrologic Forecasts by CBRFC: Colorado and Utah

← Older revision		Revision as of 17:45, 13 January 2025
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	===''Experimental Forecasts''===		===''Experimental Forecasts''===
	===ASO-~~Assimilated~~ Hydrologic Forecasts by CBRFC: Colorado and Utah===		===[https://www.cbrfc.noaa.gov/product/hydrofcst/hydrofcst.php ASO-Informed Hydrologic Forecasts by CBRFC: Colorado and Utah]===
	In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, the NOAA Colorado Basin River Forecast Center (CBRFC) is producing experimental seasonal water-supply forecasts for ~~a few dozen~~ gages in Colorado and Utah in which SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June.		In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, the NOAA Colorado Basin River Forecast Center (CBRFC) is producing experimental seasonal water-supply forecasts for ~20 gages in Colorado and Utah. In these forecasts--which can supplement, but do not replace, CBRFC's official forecasts for the same gages--SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June. CBRFC has committed to producing the ASO-informed experimental forecasts in spring 2025.

	===[[Woodson Lees Ferry WY flow forecast]]===		===[[Woodson Lees Ferry WY flow forecast]]===

JeffreyJLukas: /* WRF-Hydro/Airborne Snow Observatories Assimilated Hydrologic Forecasts: Colorado */

2025-01-13T21:21:24Z

WRF-Hydro/Airborne Snow Observatories Assimilated Hydrologic Forecasts: Colorado

← Older revision		Revision as of 17:21, 13 January 2025
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	===''Experimental Forecasts''===		===''Experimental Forecasts''===
	===~~[https://coloradosnow.org/ WRF~~-~~Hydro/Airborne Snow Observatories~~ Assimilated Hydrologic Forecasts: Colorado]===		===ASO-Assimilated Hydrologic Forecasts by CBRFC: Colorado and Utah===
	~~Under the aegis of~~ the Colorado Airborne Snow Measurements (CASM) ~~workgroup~~ and ~~program~~, the ~~WRF-Hydro modeling team at NCAR~~ is producing experimental seasonal water-supply forecasts, for ~~several~~ dozen gages in Colorado~~, that assimilate~~ SWE estimates from the Airborne Snow Observatories (ASO) lidar system. In ~~2023~~, the forecasts were produced ~~every 1~~-~~2 weeks from~~ early ~~May through~~ June.		In collaboration with the [https://coloradosnow.org/ Colorado Airborne Snow Measurements (CASM)] program, the Colorado River Authority of Utah, and the Central Utah Water Conservancy District, the NOAA Colorado Basin River Forecast Center (CBRFC) is producing experimental seasonal water-supply forecasts for a few dozen gages in Colorado and Utah in which SWE estimates from the Airborne Snow Observatories (ASO) lidar system are directly inserted into CBRFC's SNOW-17 snowpack model. In 2024, [https://www.cbrfc.noaa.gov/product/aso_2024.html the experimental CBRFC forecasts] were produced 2-3 times at each gage between late March and early June.

	===[[Woodson Lees Ferry WY flow forecast]]===		===[[Woodson Lees Ferry WY flow forecast]]===