606  
AXUS73 KUNR 151710  
DGTUNR  
 
DROUGHT INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE RAPID CITY SD  
1010 AM MDT THU FEB 15 2018  
   
..DROUGHT CONDITIONS CONTINUE ACROSS WESTERN SOUTH DAKOTA
 
 
SYNOPSIS...  
 
SINCE OCTOBER 1 2017, PRECIPITATION HAS VARIED FROM NEAR AVERAGE  
ACROSS NORTHEASTERN WYOMING TO BELOW AVERAGE OVER MUCH OF THE  
WESTERN AND SOUTH CENTRAL SOUTH DAKOTA PLAINS. ACROSS THE BLACK  
HILLS, THE NORTHERN HALF OF THE BLACK HILLS HAS SEEN BELOW AVERAGE  
PRECIPITATION, WHILE THE SOUTHERN HALF OF THE BLACK HILLS HAS  
RECEIVED ABOVE AVERAGE PRECIPITATION. TEMPERATURES HAVE BEEN NEAR  
AVERAGE ACROSS THE AREA SINCE OCTOBER 1.  
 
SNOW COVER ACROSS THE PLAINS RANGES FROM LITTLE TO NO SNOWPACK  
ACROSS SOUTHERN PORTIONS OF NORTHEAST WYOMING AND PARTS OF SOUTHWEST  
AND SOUTH CENTRAL SOUTH DAKOTA TO SIX TO TWELVE INCHES ACROSS FAR  
NORTHEAST WYOMING AND NORTHWEST SOUTH DAKOTA. SNOW WATER EQUIVALENT  
IS ONE INCH TO AROUND TWO INCHES ACROSS FAR NORTHEAST WYOMING AND  
NORTHWEST SOUTH DAKOTA. ACROSS THE BLACK HILLS AND BEAR LODGE  
MOUNTAINS, SNOWPACK AND SNOW WATER EQUIVALENT ARE NEAR AVERAGE FOR  
THIS TIME OF YEAR. MARCH AND APRIL ARE TYPICALLY THE TWO SNOWIEST  
MONTHS, WHEN A THIRD OF THE SEASONAL SNOWFALL USUALLY HAPPENS.  
 
THE LATEST U.S. DROUGHT MONITOR DEPICTS:  
 
* SEVERE (D2) DROUGHT CONDITIONS COVERED PERKINS, WESTERN ZIEBACH,  
EASTERN BUTTE, MOST OF MEADE, EASTERN PENNINGTON, WESTERN HAAKON,  
NORTHERN JACKSON, NORTHERN OGLALA LAKOTA, AND FAR NORTHEASTERN  
FALL RIVER COUNTIES.  
* MODERATE (D1) DROUGHT IN SOUTH DAKOTA COVERED THE REST OF BUTTE,  
MEADE, PENNINGTON, FALL RIVER, OGLALA LAKOTA, JACKSON, HAAKON,  
ZIEBACH COUNTIES, AS WELL AS HARDING, CUSTER, EASTERN LAWRENCE,  
BENNETT, WESTERN TODD, AND WESTERN MELLETTE COUNTIES. IN  
NORTHEASTERN WYOMING, MODERATE (D1) DROUGHT CONDITIONS COVERED FAR  
NORTHEASTERN CAMPBELL AND NORTHERN CROOK COUNTIES.  
* ABNORMALLY DRY (D0) CONDITIONS COVERED THE REST OF CROOK AND  
NORTHERN CAMPBELL COUNTIES IN NORTHEASTERN WYOMING, AS WELL AS  
REST OF WESTERN SOUTH DAKOTA.  
 
SUMMARY OF IMPACTS...  
 
DROUGHT IMPACTS CONTINUE TO BE REPORTED BY PRODUCERS DUE TO DRY  
SOILS. STOCK PONDS AND DUGOUTS ARE DRY OR CONTAIN WATER OF POOR  
QUALITY. NUMEROUS PASTURE AND HAY LANDS HAVE NOT BEEN ABLE TO  
RECOVER FROM THE DRY CONDITIONS OVER THE SUMMER.  
 
CLIMATE SUMMARY...  
 
SO FAR IN FEBRUARY, TEMPERATURES HAVE BEEN WELL BELOW AVERAGE AND  
PRECIPITATION HAS BEEN ABOVE AVERAGE. AVERAGE HIGH TEMPERATURES FOR  
FEBRUARY RANGE FROM THE LOWER 30S IN NORTHWESTERN SOUTH DAKOTA TO  
THE LOWER 40S ACROSS SOUTHWESTERN SOUTH DAKOTA. AVERAGE LOWS RANGE  
FROM THE LOWER TEENS ACROSS NORTHWEST SOUTH DAKOTA TO NEAR 20 ACROSS  
SOUTHWEST SOUTH DAKOTA. AVERAGE PRECIPITATION TYPICALLY RANGES FROM  
A QUARTER TO A HALF INCH ON THE PLAINS TO AN INCH AND A HALF OVER  
THE NORTHERN BLACK HILLS.  
 
PRECIPITATION/TEMPERATURE OUTLOOK...  
 
SEA SURFACE TEMPERATURES IN THE TROPICAL PACIFIC OCEAN ARE BELOW  
AVERAGE, INDICATING LA NINA CONDITIONS. THE OUTLOOK FOR THE SPRING  
AND SUMMER IS FOR LA NINA CONDITIONS TO TREND TOWARD EL NINO  
SOUTHERN OSCILLATION (ENSO) NEUTRAL CONDITIONS. FOR THE NORTHERN  
PLAINS, THIS PATTERN TYPICALLY FAVORS NEAR AVERAGE TEMPERATURES AND  
PRECIPITATION THROUGH THE SPRING.  
 
THE OUTLOOK FOR THE REST OF FEBRUARY SHOWS BELOW AVERAGE  
TEMPERATURES AND ABOVE AVERAGE PRECIPITATION. THE THREE MONTH  
OUTLOOK FOR MARCH, APRIL, AND MAY CALLS FOR NEAR TO BELOW AVERAGE  
TEMPERATURES AND NEAR AVERAGE PRECIPITATION  
 
THE U.S. MONTHLY DROUGHT OUTLOOK INDICATES DROUGHT CONDITIONS WILL  
PERSIST THROUGH EARLY SPRING.  
 
HYDROLOGIC SUMMARY AND OUTLOOK...  
 
ACCORDING TO THE BUREAU OF RECLAMATION, JANUARY END OF MONTH  
RESERVOIR ELEVATIONS WERE ABOVE AVERAGE AT ANGOSTURA, BELLE FOURCHE,  
DEERFIELD, KEYHOLE, AND PACTOLA WHILE SHADEHILL RESERVOIR WAS BELOW  
AVERAGE. JANUARY INFLOWS INTO THESE RESERVOIRS WERE MAINLY ABOVE  
AVERAGE, WITH THE EXCEPTIONS OF INFLOWS INTO KEYHOLE AND SHADEHILL  
WHICH WERE BELOW AVERAGE. THE JANUARY INFLOW INTO SHADEHILL  
RESERVOIR WAS THE LOWEST ON RECORD.  
 
ACCORDING TO THE U.S. GEOLOGICAL SURVEY 28-DAY AVERAGE STREAMFLOW  
COMPARED TO HISTORICAL STREAMFLOW FOR THE DAY OF THE YEAR INDICATES  
NORMAL CONDITIONS ACROSS MUCH OF THE AREA.  
 
NEXT ISSUANCE...  
 
THE NEXT DROUGHT STATEMENT WILL BE ISSUED IN MARCH 2018.  
 

 
 
ACKNOWLEDGMENTS...  
 
THE DROUGHT MONITOR IS A MULTI-AGENCY EFFORT INVOLVING NOAA`S  
NATIONAL WEATHER SERVICE AND THE NATIONAL CENTERS FOR ENVIRONMENTAL  
INFORMATION, UNITED STATES DEPARTMENT OF AGRICULTURE (USDA), STATE  
AND REGIONAL CLIMATE CENTERS, AND THE NATIONAL DROUGHT MITIGATION  
CENTER AT THE UNIVERSITY OF NEBRASKA-LINCOLN. INFORMATION FOR THIS  
STATEMENT HAS BEEN GATHERED FROM THE NWS AND FEDERAL AVIATION  
ADMINISTRATION OBSERVING SITES, STATE COOPERATIVE EXTENSION  
SERVICES, UNITED STATES DEPARTMENT OF AGRICULTURE, BUREAU OF  
RECLAMATION, AND THE UNITED STATES GEOLOGICAL SURVEY.  
 
QUESTIONS OR COMMENTS...  
 
IF YOU HAVE ANY QUESTIONS OR COMMENTS ABOUT THIS DROUGHT  
INFORMATION, PLEASE CONTACT...  
 
MELISSA SMITH  
SERVICE HYDROLOGIST  
NATIONAL WEATHER SERVICE  
300 EAST SIGNAL DRIVE  
RAPID CITY SOUTH DAKOTA 57701  
605-341-9271  
MELISSA.SMITH@NOAA.GOV  
 
RELATED WEB SITES...  
 
U.S. DROUGHT PAGE...  
HTTP://WWW.DROUGHT.GOV  
 
SOUTH DAKOTA CLIMATE AND WEATHER INFORMATION...  
HTTP://CLIMATE.SDSTATE.EDU  
 
WYOMING WATER AND CLIMATE INFORMATION...  
HTTP://WWW.WRDS.UWYO.EDU/  
 
U.S. DROUGHT MONITOR...  
HTTP://DROUGHTMONITOR.UNL.EDU  
 
RIVER AND RESERVOIR INFORMATION  
NWS - HTTP://WATER.WEATHER.GOV/AHPS  
USGS - HTTP://WWW.USGS.GOV/WATER  
USBR - HTTP://WWW.USBR.GOV/GP/LAKES_RESERVOIRS  
 
CLIMATE PREDICTION CENTER...  
HTTP://WWW.CPC.NCEP.NOAA.GOV  
 
BLACK HILLS FIRE RESTRICTIONS...  
HTTP://BLACKHILLSFIRERESTRICTIONS.COM  
 

 
 
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