Laserfiche WebLink
Attachment B <br />Current Geographic Areas of Concern <br /> <br />The CWCB has objectively assessed the snowpack and flood threat situation utilizing several key factors. The <br />following information is provided for consideration by response agencies and concerned parties. <br /> <br />Criteria for Monitoring Snowpack in Specific Areas <br /> <br />1. Snow Water Equivalent (SWE) of the snowpack within major watersheds <br />? <br /> SWE at 120% of average or greater for watersheds of moderate concern <br />? <br /> SWE at 140% of average or greater for watersheds of high concern <br />? <br /> SWE at 160% of average or greater for watersheds of extremely high concern <br />2. History of snowmelt flooding problems in watershed <br />3. Timing of likely runoff peak within snowmelt season – still too early to tell, and will be based <br />primarily on the absence or presence of spring heat waves <br /> <br /> <br />Specific Locations of Concern <br /> <br />1. Entire Rio Grande Basin (Basin SWE at 164% of average) <br />2. Entire San Miguel, Dolores, Animas, San Juan River Basins (Basin SWE at 152% of average) <br />3. Entire Gunnison River Basins (Basin SWE at 145% of average) <br />4. Entire Upper Colorado River Basin (Basin SWE at 129% of average, with some individual <br />subbasins notably higher) <br />5. Entire Arkansas River Basin (Basin SWE at 145% of average) – Note that snowmelt is not <br />anticipated to cause problems on the Arkansas River mainstem below Pueblo Reservoir <br />6. One subbasin within the South Platte River Basin <br />? <br /> St. Vrain Creek Basin, tributary to South Platte River (subbasin SWE at 141% of average) <br /> <br />Note: The above SWE percentages are based on data obtained during the week of March 3, 2008 <br /> <br />Supporting GIS-based Snowpack Maps <br /> <br />All SNODAS snowpack maps have been prepared and completed for all major river basins using March <br />st <br />1, 2008 data. These maps show the following: <br />? <br /> Inches of SWE from SNODAS <br />? <br /> % of average SWE at SNOTELs <br />? <br /> Hydrologic Unit Code (HUC) subbasin boundaries <br />? <br /> Selected streams <br />? <br /> Counties and municipalities <br /> <br />These maps have been posted to the CWCB website and can be found here: SNODAS maps <br /> <br /> <br /> <br />