CWCB Drought update #drought


Click here to go to the Colorado Water Conservation Board Water Availability and Flood Task Forces website. From email from the Colorado Water Conservation Board:

Globally, calendar year 2014 was the warmest on record. In Colorado the year ended with above average temperatures, making it the state’s 18th warmest calendar year and the warmest since 2012. Following a wet month of precipitation in December, January 1st snow accumulation was above average for the northern half of the state. 2014 was the wettest calendar year in Colorado in 15 years. However, temperatures and precipitation have been warm and dry this month, with many basins receiving less than 50% of average January precipitation, and short term forecasts do not indicate any major storms in the last week of the month. Along the Front Range, water providers continue to indicate that storage levels are at, or near, record levels.

  • Year-to-date precipitation at mountain SNOTEL sites, as of January 20, was 87% of normal statewide. The South Platte basin has the highest snowpack at 103% of normal, while the Upper Rio Grande basin had the lowest at 64% of normal. We have reached the mid-way point towards peak snowpack in most basins, so it will be increasingly harder to make up for the biggest deficits.
  • Reservoir Storage statewide is at 105% of average as of January 1st. The lowest reservoir storage statewide continues to be the Upper Rio Grande, with 67% of average storage. The South Platte has the highest storage level at 124% of average.
  • Reservoir Storage in the Upper Rio Grande has been below normal for most of the last 14years.
  • South Platte Reservoir storage levels are at the highest levels in Natural Resource Conservation Service records; and Northern Water is reporting that Carter Lake, Lake Granby and Horsetooth Reservoir have the highest combined levels in the history of the project.
  • January 1st streamflow forecasts are near normal for most of the northern half of the state and below normal for the basins in the southwest and Rio Grande. However, the lack of precipitation in January will likely result in decreased forecasts for February 1st statewide.
  • The Surface Water Supply Index (SWSI) for the state is near normal across much of the state. The lowest value in the state reflects low reservoir levels in Platoro reservoir.
  • Both the Climate Prediction Center and the Long-term Experimental forecast predict above average precipitation for the next three months. However, this year has been unique and there are no good analog years that can provide insight on how reliable these forecasts are.
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