Drought Information Statement
Issued by NWS Denver/Boulder, CO

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000
AXUS75 KBOU 270009
DGTBOU
COC001-005-013-014-019-031-035-039-047-049-057-
059-069-073-075-087-093-095-115-117-121-123-180000-

DROUGHT INFORMATION STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
608 PM MDT THU APR 26 2018

...Severe Drought continues in Elbert and Lincoln Counties on the
central Colorado plains while conditions improve in Grand County
west of the Continental Divide...

SYNOPSIS...

A weather system brought strong winds, followed by rain and snow.
Numerous areas in northeast and north central Colorado received
between 0.5 and 1 inch of precipitation during the past week.
However, some locations on the central Colorado plains reported
little precipitation with the recent storm events.

LOCAL AREAS AFFECTED...

Severe Drought /D2/ and Moderate Drought /D1/ continued in areas of
central Colorado, particularly on the plains. Abnormally Dry
Conditions were removed from Grand County in north central Colorado
as shown on the U.S. Drought Monitor valid April 24th.

IMPACTS...

Really dry air being blown by strong and damaging winds caused
drying of soils and grass fires in the Severe Drought /D2/ areas in
Lincoln and Elbert Counties.

SNOWPACK AND WATER SUPPLY...

The April 26th mountains snowpack ranged from 85 to 90 percent of
normal in the South Platte and upper Colorado River basins, and 100
percent of normal in the North Platte basin.

Reservoir storage remained above average. Combined storage was 118
percent of average in the upper Colorado River basin, and 108
percent of average in the South Platte basin on April 1st. Over 70
percent of the U.S. Geological Survey stream gages continued to have
normal to above normal flows on April 26th.

CLIMATE SUMMARY...

Preliminary 30 day NWS Cooperative Observer precipitation totals
from March 26th through April 24th are listed below:

Location              Elev     2018   Normal  Departure  % Normal
--------              ----     ----   ------  ---------  --------
Above 8000 feet
 Dillon 1E            9065     3.38     1.23      2.15      275
 Georgetown           8520     2.01     2.05     -0.04       98
 Georgetown 4SW      10020     2.05     2.49     -0.44       82
 Grand Lake 6SSW      8288     0.65     1.16     -0.51       56
 Grant                8675     1.52     1.41      0.11      108
 Walden               8056     0.63     1.09     -0.46       58
 Winter Park          9108     3.77     3.10      0.67      122

6000 to 8000 feet
 Cheesman Reservoir   6880     1.14     1.57     -0.43       73
 Conifer 6NE          7180     2.22     2.97     -0.75       75
 Evergreen            6985     1.73     2.29     -0.56       76
 Glendevey 11NNW      7760     0.74     1.65     -0.91       45
 Virginia Dale 7ENE   7015     1.77     1.96     -0.19       90
 Williams Fork Rsvr   7618     1.73     1.27      0.46      136

Front Range Urban Corridor
 Boulder              5484     2.65     2.79     -0.14       95
 Denver area          5284     1.51     1.53     -0.02       99
 Fort Collins         5004     1.06     1.91     -0.85       55
 Greeley              4715     0.82     1.62     -0.80       51
 Loveland 2N          5080     1.17     2.05     -0.88       57
 Northglenn           5407     1.80     1.68      0.12      107
 Wheat Ridge          5398     1.76     2.27     -0.51       78

Northeast/East Central Colorado Plains
 Akron 4E             4540     1.73     1.24      0.49      140
 Holyoke              3780     1.47     1.64     -0.17       90
 Karval               5075     0.57     1.19     -0.62       48
 Leroy 5WSW           4550     2.48     1.43      1.05      173
 New Raymer 21N       5180     1.35     1.54     -0.19       88
 Sedgwick 5S          3990     2.27     1.72      0.55      132
 Woodrow 6NNE         4374     0.91     1.11     -0.20       82

Preliminary 90 day NWS Cooperative Observer precipitation totals
from January 25th through April 24th:

Location            County     2018   Normal  Departure  % Normal
--------             ----      ----   ------  ---------  --------
Above 8000 feet
 Dillon 1E          Summit     5.11     3.13      1.98      163
 Georgetown         Clear Ck   3.46     4.32     -0.86       80
 Georgetown 4SW     Clear Ck   3.62     5.06     -1.44       72
 Grand Lake 6SSW    Grand      1.45     2.86     -1.41       51
 Grant              Park       2.35     3.08     -0.73       76
 Walden             Jackson    1.46     2.46     -1.00       59
 Winter Park        Grand      9.13     7.68      1.45      119

6000 to 8000 feet
 Cheesman Resvr     Douglas    1.78     3.37     -1.59       53
 Conifer 6NE        Jefferson  4.03     5.92     -1.89       68
 Evergreen          Jefferson  2.74     4.66     -1.92       59
 Glendevey 11NNW    Larimer    1.81     3.72     -1.91       49
 Virginia Dale 7ENE Larimer    3.66     3.52      0.14      104
 Williams Fork Rsvr Grand      3.94     3.09      0.85      128

Front Range Urban Corridor
 Boulder            Boulder    4.62     5.48     -0.86       84
 Denver area        Denver     2.19     2.61     -0.42       84
 Fort Collins       Larimer    2.13     3.66     -1.53       58
 Greeley            Weld       1.82     3.00     -1.18       61
 Loveland 2N        Larimer    2.65     3.92     -1.27       68
 Northglenn         Adams      3.07     3.06      0.01      100
 Wheat Ridge        Jefferson  3.36     4.47     -1.11       75

Northeast/East Central Colorado Plains
 Akron 4E           Washington 2.80     2.44      0.36      115
 Holyoke            Phillips   2.13     3.04     -0.91       70
 Karval             Lincoln    0.82     2.19     -1.37       37
 Leroy 5WSW         Logan      3.15     2.69      0.46      117
 New Raymer 21N     Weld       2.49     2.77     -0.28       90
 Sedgwick 5S        Sedgwick   2.68     3.21     -0.53       83
 Woodrow 6NNE       Morgan     1.77     2.25     -0.48       79

PRECIPITATION/TEMPERATURE OUTLOOKS...

There is a tilt toward above normal precipitation in early May but
near to below normal precipitation for the month of May. The CPC
outlooks have a tilt toward below normal temperatures the first part
of May, becoming near to above normal the remainder of the month.
The U.S. Seasonal Drought Outlook valid through July 31st calls for
drought improvement on the eastern Colorado plains.

&&

RELATED WEB SITES...

Additional information on current drought conditions may be found at
the following addresses:

Local weather...climate and water information: www.weather.gov/bou

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

Colorado Climate Center NIDIS Weekly Summary:
climate.colostate.edu/~drought/

NWS Climate Prediction Center Outlooks:
www.cpc.ncep.noaa.gov

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

ACKNOWLEDGMENTS...

The U.S. Drought Monitor is a multi-agency effort involving NOAA`s
National Weather Service, State and Regional Climate Centers,
Department of Agriculture (USDA) and the National Drought Mitigation
Center. Information for this statement has been gathered from NWS
and FAA observation sites, Cooperative Network stations, the Natural
Resources Conservation Service SNOTEL Network, U.S. Geological
Survey, U.S. Bureau of Reclamation and U.S. Army Corp of Engineers
stream and reservoir gages.

$$
tlh



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