Drought Information Statement
Issued by NWS Denver/Boulder, CO

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AXUS75 KBOU 202330
DGTBOU
COC001-005-013-014-019-031-035-039-047-049-057-
059-069-073-075-087-093-095-115-117-121-123-100000-

DROUGHT INFORMATION STATEMENT
NATIONAL WEATHER SERVICE DENVER CO
430 PM MST FRI JAN 20 2017

..RAIN HELPS ALLEVIATE DROUGHT IN LARIMER COUNTY IN NORTH CENTRAL
COLORADO...

SYNOPSIS...

SEVERE DROUGHT /D2/ WAS REPLACED BY MODERATE DROUGHT /D1/ IN LARIMER
COUNTY. FROM THE COLORADO NIDIS DROUGHT AND WATER ASSESSMENT "WITH
THE PAST MONTH OF PRECIPITATION...SEVERE DROUGHT CONDITIONS WERE
REMOVED FROM LARIMER COUNTY. SPI VALUES 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 IMPROVE..." THE STANDARD PRECIPITATION INDEX /SPI/
IS A PROBABILITY INDEX THAT ONLY CONSIDERS PRECIPITATION. THE SPI
WAS DEVELOPED TO MONITOR POTENTIAL SHORT TERM AGRICULTURAL AND LONG
TERM HYDROLOGIC DROUGHT CONDITIONS. THE MORE NEGATIVE THE SPI VALUE
IS...THE FARTHER BELOW NORMAL PRECIPITATION IS.

LOCAL AREAS AFFECTED...

ON THE JANUARY 17TH U.S. DROUGHT MONITOR...THE ONLY CHANGE FROM THE
PREVIOUS WEEK WAS LESSENING DROUGHT IN CENTRAL AND EASTERN LARIMER
COUNTY. MODERATE DROUGHT /D1/ AND ABNORMALLY DRY /D0/ CONDITIONS
CONTINUE EAST OF THE CONTINENTAL DIVIDE. THE ONLY AREAS WEST OF THE
DIVIDE WITH ABNORMALLY DRY /D1/ CONDITIONS ARE ADJACENT TO THE
DIVIDE.

HYDROLOGIC SUMMARY...

THE MOUNTAIN SNOWPACK RANGED FROM 152 TO 155 PERCENT OF NORMAL FOR
THE SOUTH PLATTE AND UPPER COLORADO RIVER BASINS AND 138 PERCENT OF
NORMAL FOR THE LARAMIE AND NORTH PLATTE BASINS. STREAMFLOW REMAINED
MOSTLY IN THE NORMAL RANGE FOR THIS TIME OF YEAR.

CLIMATE SUMMARY...

BELOW ARE UNOFFICIAL NWS COOPERATIVE OBSERVER SNOWFALL TOTALS FOR
THE WATER YEAR SO FAR BEGINNING OCTOBER 1ST 2016. THE MOUNTAIN
SNOWFALL HAS BEEN WELL ABOVE NORMAL...EXCEPT IN THE NORTH AND SOUTH
PARK VALLEYS. MUCH OF THE URBAN CORRIDOR WAS NEAR OR SLIGHTLY BELOW
NORMAL. SNOWFALL IN THE FRONT RANGE FOOTHILLS BELOW 8000 FEET AND
EASTERN PLAINS HAS GENERALLY BEEN BELOW NORMAL.
LOCATION            ELEV    2017   NORMAL  DEPARTURE  % NORMAL
--------            ----    ----   ------  ---------  --------
ABOVE 8000 FEET
 ANTERO RESERVOIR   8920    13.0    17.9     -4.9        73
 DILLON             9065    98.5    45.7     52.8       216
 GEORGETOWN         8520    59.6    40.8     18.8       146
 GEORGETOWN 4SW    10020    86.2    54.0     32.2       160
 GRANT              8675    32.7    37.9     -5.2        86
 LAKE GEORGE 8SW    8550    14.8    22.8     -8.0        65
 WALDEN             8056    51.5    30.5     21.0       169
 WINTER PARK        9108   140.8    97.3     43.5       145

6000 TO 8000 FEET
 CHEESMAN RESERVOIR 6880    17.0    28.4    -11.4        60
 EVERGREEN          6985    24.8    32.2     -7.4        77
 GLENDEVEY 11NNW    7760    37.5    42.1     -4.6        89
 GROSS RESERVOIR    7970    33.5    42.1     -8.6        80
 INTER CANYON       7180    28.0    54.5    -26.5        51
 KREMMLING          7460    24.4    28.3     -3.9        86
 VIRGINIA DALE      7015    33.5    34.3     -0.8        98
 WILLIAMS FORK RSVR 7618    55.7    34.8     20.9       160

FRONT RANGE URBAN CORRIDOR
 BOULDER            5484    36.0    40.2     -4.2        90
 DENVER STAPLETON   5284    21.8    25.6     -3.8        85
 FORT COLLINS       5004    21.6    25.1     -3.5        86
 GREELEY            4715    13.3    19.4     -6.1        69
 LAKEWOOD           5640    24.4    25.0     -0.6        98
 LOVELAND           5080    22.1    19.9      2.2       111
 NORTHGLENN         5407    21.4    19.3      2.1       111
 RALSTON RESERVOIR  5900    29.5    29.1      0.4       101
 WATERDALE          5230    23.9    19.8      4.1       121
 WHEAT RIDGE        5398    30.8    36.7     -5.9        84

NORTHEAST AND EAST CENTRAL PLAINS
 AKRON 4E           4540    16.4    15.6      0.8       105
 HOLYOKE            3780    12.0    15.4     -3.4        78
 LEROY 5WSW         4550     9.6    18.4     -8.8        52
 NEW RAYMER 21N     5180    18.1    20.5     -2.4        88
 SEDGWICK 5S        3990    10.0    16.9     -6.9        59
 WOODROW 6NNE       4374    15.8    15.0      0.8       105

PRECIPITATION/TEMPERATURE OUTLOOKS...

FEBRUARY AS WELL AS FEBRUARY THROUGH APRIL OUTLOOKS CALL FOR EQUAL
CHANCES OF ABOVE...NORMAL OR BELOW NORMAL TEMPERATURES AND
PRECIPITATION.

&&

RELATED WEB SITES...

ADDITIONAL INFORMATION ON CURRENT DROUGHT CONDITIONS MAY BE FOUND
AT THE FOLLOWING WEB ADDRESSES /USE LOWER CASE LETTERS/:

LOCAL WEATHER...CLIMATE AND WATER INFORMATION
WWW.WEATHER.GOV/BOU

US DROUGHT MONITOR
DROUGHTMONITOR.UNL.EDU

COLORADO CLIMATE CENTER/NIDIS DROUGHT PRESENTATIONS
CLIMATE.COLOSTATE.EDU/DROUGHT_WEBINAR.PHP

NWS CLIMATE PREDICTION CENTER OUTLOOKS
WWW.CPC.NCEP.NOAA.GOV/PRODUCTS/PREDICTIONS/
WWW.CPC.NCEP.NOAA.GOV/PRODUCTS/EXPERT_ASSESSMENT/
SEASONAL_DROUGHT.PNG

US DEPARTMENT OF AGRICULTURE
HTTP://WWW.CO.NRCS.USDA.GOV/
HTTP://WWW.NASS.USDA.GOV/

CWCB WATER AVAILABILITY TASK FORCE PRESENTATIONS
CWCB.STATE.CO.US/PUBLIC-INFORMATION/FLOOD-WATER-AVAILABILITY-TASK-
FORCES/

ACKNOWLEDGMENTS...

THE 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...NATURAL
RESOURCES CONSERVATION SERVICE SNOTEL NETWORK...COCORAHS NETWORK AS
WELL AS COLORADO DIVISION OF WATER RESOURCES... US GEOLOGICAL
SURVEY...BUREAU OF RECLAMATION AND US ARMY CORP OF ENGINEERS STREAM
AND RESERVOIR GAUGES.

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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