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NIDIS Intermountain West
Regional Drought Early Warning System
January 17, 2017

Current U.S. Drought Monitor Depiction

Recommended Changes

Summary: January 17, 2017

Last week brought more precipitation to the Upper Colorado River Basin, mainly in western Colorado.  This area saw at least 0.50 inch with some areas seeing up to 4.00 inches of liquid.  Southwestern Wyoming saw less, with up to 0.50 inch in much of Sweetwater County, with a large area seeing between 0.10 and 0.25 inches.  Eastern Utah received between 0.25 and 1.00 inch over the last week.

East of the Divide, Colorado saw up to 1.00 inch along the Front Range.  Amounts decreased quickly with much of eastern Colorado seeing less than 0.25 inch last week.  Southeastern Colorado and eastern Cheyenne, Kit Carson and Yuma counties saw between 0.50 and 1.00 inches of precipitation.

SPIs for the past 30 days remain positive through the UCRB and Colorado, with many in western Colorado showing up in the +2 and greater range.  Longer-term SPIs in eastern Colorado are still dry with 90-day SPI in the 0 to -1.5 range and 6-month SPIs still showing the dry end to summer and fall.


UCRB:  It is recommended that the remaining D0 in Summit County, CO be removed.  This D0 removal also includes Chaffee County.  It is also recommended the D0 in Emery, Wayne, Garfield and eastern Sevier counties in southern Utah be removed.  SPIs out to 9-months are positive and snotel precipitation is above the median for these areas.  There seems to be no sign of abnormally dry in the UCRB at this time.

Eastern Colorado: Removal of D2 in Larimer and Kiowa counties is recommended.  With the past month of precipitation, SPIs for 30 and 90 days are now positive.  The recent precipitation in Larimer County does not make up for the dry late summer and fall, however it has helped, giving justification to improvement.



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