Drought Information Statement
Issued by NWS Denver/Boulder, CO

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179
AXUS75 KBOU 070057
DGTBOU
COC001-005-013-014-019-031-035-039-047-049-057-059-069-073-075-087-
093-095-115-117-121-123-060000-

Drought Information Statement
National Weather Service Denver/Boulder CO
656 PM MDT Thu Apr 6 2017

...Drought Conditions Improve in the Northeast Corner of Colorado...

Synopsis...
"Eastern Colorado in March saw a swath of much above normal
precipitation from the northeast corner of the state to south-
central Colorado thanks to an active pattern at the end of the
month. The Front Range missed out on the precipitation with the
northern Front Range from Larimer to Douglas County seeing 50-70% of
normal precipitation. The southern Front Range from Douglas (County
southward) saw less than 50% of normal March precipitation... It
should be noted the bulk of this precipitation fell as rain leaving
what is normally the snowiest month along the Front Range with
little to no snow" as stated in the April 4th Colorado NIDIS Weekly
Drought Summary.

Local Areas Affected...
Moderate Drought /D1/ was replaced by Abnormally Dry conditions /D0/
in Logan...Sedgwick and Phillips Counties in extreme northeast
Colorado on the April 4th US Drought Monitor. Severe Drought /D2/
continued from the Denver Metro area north to just south of the
Colorado Wyoming border. Abnormally Dry conditions /D0/ prevailed
across the northeast Colorado plains with Moderate Drought /D1/
common on the east central plains. There were no drought
designations in the upper Colorado River Basin immediately west of
the Continental Divide.

Hydrologic Summary...
On April 6th the mountain snowpack at NRCS SNOTEL sites was 111
percent of normal in the South Platte Basin...108 percent of normal
in the upper Colorado River Basin and 100 percent of normal in the
North Platte Basin.

Basin reservoir storage at the end of March was 106 percent of
average in the South Platte Basin and 108 percent of average in the
upper Colorado River Basin. This is similar to storage last month
and also a year ago. The majority of U.S. Geological Survey gages
continued to record near to above normal streamflow east of the
divide and near to much above normal flows west of the divide.

Climate Summary...
High pressure combined with downslope flow brought warm...windy and
drier than normal weather the first three weeks of March. There was
a very warm stretch from March 15th through the 23rd with
temperatures at or above 70 degrees on those days. A pattern change
occurred the final week of March into early April as a series of
storm systems moved across Colorado. This brought temperatures more
typical of this time of year along with much needed precipitation.
Preliminary 30 day NWS Cooperative Observer precipitation totals
from March 7th through April 5th are listed below:

Location            Elev     2017   Normal  Departure  % Normal
--------            ----     ----   ------  ---------  --------
Above 8000 feet
 Dillon 1E          9065     1.19     1.02      0.17      117
 Georgetown         8520     1.84     1.66      0.18      111
 Georgetown 4SW    10020     3.63     2.05      1.58      177
 Grant              8675     1.67     1.25      0.42      134
 Walden             8056     0.28     0.81     -0.53       35
 Winter Park        9108     2.55     2.57     -0.02       99

6000 to 8000 feet
 Cheesman Reservoir 6880     1.65     1.46      0.19      113
 Conifer 6NE        7180     4.29     2.54      1.75      169
 Evergreen          6985     2.06     2.12     -0.06       97
 Glendevey 11NNW    7760     0.53     1.41     -0.88       38
 Virginia Dale 7ENE 7015     0.92     1.38     -0.46       67
 Williams Fork Rsvr 7618     0.78     0.98     -0.20       80

Front Range Urban Corridor
 Boulder            6484     3.03     2.29      0.74      132
 Denver area        5284     1.21     0.98      0.23      123
 Fort Collins       5004     1.21     1.60     -0.39       76
 Greeley            4715     0.86     1.15     -0.29       75
 Loveland 2N        5080     1.43     1.66     -0.23       86
 Northglenn         5407     1.56     1.25      0.31      125
 Wheat Ridge        5398     1.87     1.91     -0.04       98

Northeast/East Central Colorado Plains
 Akron 4E           4540     1.61     0.94      0.67      171
 Holyoke            3780     1.66     1.07      0.59      155
 Karval             5075     2.91     0.88      2.03      331
 Leroy 5WSW         4550     1.48     1.02      0.46      145
 New Raymer 21N     5180     1.67     1.05      0.62      159
 Sedgwick 5S        3990     1.57     1.14      0.43      138
 Woodrow 6NNE       4374     1.57     0.91      0.66      173

Weather Outlooks...
The 8 to 14 day outlook has a tilt toward above average
precipitation and temperatures.

&&

Related web sites...
Additional information on current drought conditions may be found
at the following web addresses...

Advanced Hydrologic Prediction Service (AHPS):
http://water.weather.gov/ahps2/index.php?wfo=bou

U.S. Drought Monitor:
http://droughtmonitor.unl.edu/

Colorado Climate Center/NIDIS Drought Presentations:
http://climate.colostate.edu/drought_webinar.php

NWS Climate Prediction Center Outlooks:
http://www.cpc.ncep.noaa.gov/products/predictions/
http://www.cpc.ncep.noaa.gov/products/expert_assessment/
sdo_summary.php

Natural Resources Conservation Service:
https://www.nrcs.usda.gov/wps/portal/nrcs/main/co/snow/

CWCB Water Availability Task Force Presentations:
http://cwcb.state.co.us/public-information/
flood-water-availability-task-forces/Pages/main.aspx

USGS DroughtWatch and WaterWatch:
co.water.usgs.gov/drought/
waterwatch.usgs.gov/?m=real&r=co

Acknowledgments...
The Drought Monitor is a multi-agency effort involving the National
Weather Service and National Climatic Data Center, the U.S.
Department of Agriculture, State and Regional Center Climatologists
and the National Drought Mitigation Center. Information for this
statement has been gathered from NWS and FAA observation
sites...cooperative network stations, Natural Resources Conservation
Service SNOTEL network...CoCoRaHS network as well as the Colorado
Division of Water Resources...U.S. Geological Survey...U.S. Bureau
of Reclamation and U.S. Army Corp or Engineers stream and reservoir
gages.

Questions or Comments...
If you have any questions or comments about this drought information
please contact...
National Weather Service
325 Broadway
Boulder CO 80305
303-494-4221


$$
tlh



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