721  
AXUS75 KBOU 102354  
DGTBOU  
COC001-005-013-014-019-031-035-039-047-049-057-059-069-073-075-087-  
093-095-115-117-121-123-310000-  
 
DROUGHT INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE DENVER CO  
553 PM MDT FRI AUG 10 2018  
 
...SEVERE DROUGHT IN THE HEADWATERS OF THE COLORADO RIVER WEST OF  
THE CONTINENTAL DIVIDE AND ON THE EAST CENTRAL PLAINS EAST OF THE  
DIVIDE...  
 
SYNOPSIS...  
 
ABOVE NORMAL TEMPERATURES AND DRY CONDITIONS PERSISTED THE FIRST  
SEVERAL WEEKS OF JULY. THIS WAS FOLLOWED BY A COOLING TREND AND  
WETTER CONDITIONS FROM THE END OF JULY INTO EARLY AUGUST. HOWEVER,  
DRIER CONDITIONS RETURNED BY THE SECOND WEEK OF AUGUST. AREAS THAT  
HAVE GENERALLY RECEIVED MORE MOISTURE FROM THUNDERSTORMS THIS SUMMER  
INCLUDE THE EASTERN COLORADO PLAINS, PALMER DIVIDE, AND EXTREME  
NORTHERN FRONT RANGE.  
 
LOCAL AREAS AFFECTED...  
 
AS DEPICTED ON THE U.S. DROUGHT MONITOR, SEVERE DROUGHT /D2/  
ENCOMPASSED GRAND, SUMMIT, WESTERN CLEAR CREEK, EXTREME SOUTHWEST  
PARK, SOUTHEAST ELBERT AND SOUTHWEST LINCOLN COUNTIES ON AUGUST 7TH.  
MODERATE DROUGHT /D1/ WAS REMOVED FROM MOST OF LARIMER COUNTY BUT  
REMAINED IN GILPIN, JACKSON, SOUTHERN DOUGLAS, EAST CENTRAL LINCOLN,  
SOUTHWEST/CENTRAL ELBERT, AND MOST OF PARK COUNTIES. ABNORMALLY DRY  
CONDITIONS /D0/ EXTENDED ACROSS JEFFERSON, BROOMFIELD, DENVER, WEST  
CENTRAL ARAPAHOE, EXTREME WESTERN ADAMS, NORTHERN DOUGLAS AND ELBERT  
COUNTIES AS WELL AS MOST OF BOULDER COUNTY.  
 
IMPACTS...  
 
IT WAS REPORTED THAT SOME WHITEWATER RAFTING TRIPS ALONG CLEAR CREEK  
WEST OF DENVER WERE INSTEAD MOVED TO A STRETCH OF THE COLORADO RIVER  
WEST OF THE DIVIDE WHERE THERE WAS MORE WATER. CLEAR CREEK WATER  
LEVELS HAD BECOME TOO LOW.  
 
REPORTS IN GRAND COUNTY AT THE END OF JULY INCLUDED SECTIONS OF THE  
FRASER RIVER NEAR FRASER CLOSED TO ANGLING, SHRUBS WERE TURNING  
COLOR AND DROPPING LEAVES, AND A COUPLE OF WELLS WENT DRY.  
 
FROM THE NIDIS INTERMOUNTAIN WEST DROUGHT WEEKLY SUMMARY AT THE END  
OF JULY 'RESERVOIRS IN THE UPPER COLORADO RIVER BASIN (UCRB) ARE  
HURTING BECAUSE OF THE DRYNESS, WHICH MEANS THIS DROUGHT IS TURNING  
INTO A HYDROLOGIC DROUGHT, WITH LONG-TERM IMPACTS. STREAMFLOWS ARE  
SHOWING THE RECENT DRYNESS AS WELL, WITH MANY GAGES IN THE UCRB  
BELOW AVERAGE. AREAS SUCH AS THE COLORADO RIVER HEADWATERS WHERE  
MELT SEASON FLOWS WERE ABOVE AVERAGE ARE NOW MUCH BELOW NORMAL TO  
LOW FLOWS.'  
 
THERE HAVE BEEN SEVERAL GRASS FIRES REPORTED IN EASTERN COLORADO IN  
THE PAST WEEK.  
 
WATER SUPPLY...  
 
RESERVOIR STORAGE IN THE SOUTH PLATTE RIVER BASIN DECREASED FROM 126  
PERCENT OF AVERAGE AT THE END OF JUNE TO 106 PERCENT OF AVERAGE BY  
THE END OF JULY. OVER TWO THIRDS OF THE U.S. GEOLOGICAL SURVEY  
STREAM GAGES IN THE NORTH PLATTE AND COLORADO RIVER BASINS IN NORTH  
CENTRAL COLORADO WERE RECORDING BELOW TO MUCH BELOW NORMAL FLOWS.  
JUST OVER HALF OF THE GAGES IN THE SOUTH PLATTE RIVER BASIN HAD  
BELOW TO MUCH BELOW NORMAL FLOWS BY AUGUST 10TH.  
 
CLIMATE SUMMARY...  
 
PRELIMINARY 30 DAY NWS COOPERATIVE OBSERVER PRECIPITATION TOTALS  
FROM JULY 10TH THROUGH AUGUST 8TH ARE LISTED BELOW:  
 
LOCATION ELEV 2018 NORMAL DEPARTURE % NORMAL  
-------- ---- ---- ------ --------- --------  
ABOVE 8000 FEET  
DILLON 1E 9065 0.99 2.05 -1.06 48  
GEORGETOWN 8520 1.31 2.43 -1.12 54  
GRAND LAKE 8720 1.93 2.13 -0.20 91  
GRANT 8675 1.23 2.68 -1.45 46  
WALDEN 8056 1.31 1.47 -0.16 89  
WINTER PARK 9108 1.38 2.25 -0.87 61  
 
6000 TO 8000 FEET  
BAILEY 7752 2.76 2.89 -0.13 96  
CHEESMAN RESERVOIR 6880 2.43 2.63 -0.20 92  
CONIFER 6NE 7180 3.82 2.41 1.41 159  
ESTES PARK 7785 1.56 2.32 -0.76 67  
EVERGREEN 6985 1.78 2.33 -0.55 76  
VIRGINIA DALE 7ENE 7015 3.69 2.42 1.27 152  
WILLIAMS FORK RSVR 7618 0.81 1.86 -1.05 44  
 
FRONT RANGE URBAN CORRIDOR  
BOULDER 5484 1.62 1.90 -0.28 85  
DENVER AREA 5284 1.47 2.87 -1.40 51  
FORT COLLINS 5004 2.25 1.85 0.40 122  
LAKEWOOD 5640 1.40 1.88 -0.48 74  
LOVELAND 2N 5080 1.22 1.73 -0.51 71  
NORTHGLENN 5407 1.51 1.93 -0.42 78  
WHEAT RIDGE 5398 1.10 1.83 -0.73 60  
 
NORTHEAST/EAST CENTRAL COLORADO PLAINS  
AKRON 4E 4540 1.34 2.71 -1.37 49  
BYERS 5ENE 5100 2.45 2.42 0.03 101  
HOLYOKE 3780 1.45 2.81 -1.36 52  
HUGO 5025 4.51 3.16 1.35 143  
KARVAL 5075 4.65 2.81 1.84 165  
LEROY 5WSW 4550 5.67 3.11 2.56 182  
SEDGWICK 5S 3990 3.91 2.62 1.29 149  
SHAW 4ENE 5000 2.31 3.35 -1.04 69  
WOODROW 6NNE 4374 3.16 3.07 0.09 103  
 
PRELIMINARY 90 DAY NWS COOPERATIVE OBSERVER PRECIPITATION TOTALS  
FROM MAY 11TH THROUGH AUGUST 8TH:  
 
LOCATION COUNTY 2018 NORMAL DEPARTURE % NORMAL  
-------- ---- ---- ------ --------- --------  
ABOVE 8000 FEET  
DILLON 1E SUMMIT 1.52 4.63 -3.11 33  
GEORGETOWN CLEAR CK 2.51 6.02 -3.51 42  
GRAND LAKE GRAND 3.45 5.38 -1.93 64  
GRANT PARK 3.90 5.87 -1.97 66  
WALDEN JACKSON 2.93 4.09 -1.16 72  
WINTER PARK GRAND 3.37 6.13 -2.76 55  
 
6000 TO 8000 FEET  
BAILEY PARK 4.39 6.76 -2.37 65  
CHEESMAN RESVR DOUGLAS 7.71 6.54 1.17 118  
CONIFER 6NE JEFFERSON 6.23 6.91 -0.68 90  
ESTES PARK LARIMER 4.56 6.31 -1.75 72  
EVERGREEN JEFFERSON 4.69 6.63 -1.94 71  
VIRGINIA DALE 7ENE LARIMER 5.99 6.71 -0.72 89  
WILLIAMS FORK RSVR GRAND 2.49 4.38 -1.89 57  
 
FRONT RANGE URBAN CORRIDOR  
BOULDER BOULDER 6.74 6.49 0.25 104  
DENVER AREA DENVER 2.84 7.03 -4.19 40  
FORT COLLINS LARIMER 6.50 6.11 0.39 106  
LAKEWOOD JEFFERSON 3.82 6.49 -2.67 59  
LOVELAND LARIMER 5.52 5.58 -0.06 99  
NORTHGLENN ADAMS 3.34 5.52 -2.18 61  
WHEAT RIDGE JEFFERSON 3.07 6.07 -3.00 51  
 
NORTHEAST/EAST CENTRAL COLORADO PLAINS  
AKRON 4E WASHINGTON 9.57 7.71 1.86 124  
BYERS 5ENE ADAMS 5.10 6.75 -1.65 76  
HOLYOKE PHILLIPS 6.62 8.79 -2.17 75  
HUGO LINCOLN 6.98 8.14 -1.16 86  
KARVAL LINCOLN 7.01 7.02 -0.01 100  
LEROY 5WSW LOGAN 12.02 8.49 3.53 142  
SEDGWICK 5S SEDGWICK 11.65 8.44 3.21 138  
SHAW 4ENE WASHINGTON 4.91 7.89 -2.98 62  
WOODROW 6NNE MORGAN 10.57 7.38 3.19 143  
 
PRECIPITATION/TEMPERATURE OUTLOOKS...  
 
THERE IS A TILT TOWARD ABOVE NORMAL TEMPERATURES AND NEAR NORMAL  
PRECIPITATION IN THE TWO WEEK AND AUGUST THROUGH OCTOBER OUTLOOKS.  
 

 
 
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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