778  
AXUS73 KABR 191856  
DGTABR  
MNC011-155-SDC013-017-021-025-029-031-037-039-041-045-049-051-057-  
059-065-069-075-085-089-091-107-109-115-117-119-129-211900-  
 
DROUGHT INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE ABERDEEN SD  
156 PM CDT THU APR 19 2018 /1256 PM MDT THU APR 19 2018/  
   
..DROUGHT CONDITIONS IMPROVING ACROSS THE REGION
 
 
SYNOPSIS...  
 
SINCE LATE FEBRUARY, THE WEATHER PATTERN HAS BEEN WET WITH BELOW  
NORMAL TEMPERATURES. MORE RECENTLY, FREQUENT ROUNDS OF HEAVY SNOW  
HAVE MOVED ACROSS THE REGION THROUGH THE MONTH OF APRIL AS  
TEMPERATURES REMAIN COLD. IN FACT, THE FIRST HALF OF APRIL WAS THE  
COLDEST ON RECORD FOR THE AREA. THE ABOVE NORMAL PRECIPITATION HAS  
ALLOWED DROUGHT CONDITIONS TO EASE THROUGHOUT THE REGION, EVEN OVER  
CENTRAL SOUTH DAKOTA. WE HAVE FINALLY SEEN A REMOVAL OF D2 (SEVERE  
DROUGHT) ACROSS CENTRAL AND WESTERN SOUTH DAKOTA.  
 
D1 (MODERATE) DROUGHT COUNTIES: CORSON, WESTERN DEWEY, NORTHWEST  
CAMPBELL.  
 
D0 (ABNORMALLY DRY) COUNTIES: JONES, STANLEY, EASTERN DEWEY,  
CAMPBELL, WALWORTH, MCPHERSON, EDMUNDS, BROWN, MARSHALL, NORTHERN  
DAY, WESTERN ROBERTS.  
 
SUMMARY OF IMPACTS...  
 
STATE AND LOCAL ACTIONS:  
NONE KNOWN.  
 
SOIL MOISTURE CONDITIONS:  
ACCORDING TO THE LATEST RELEASE OF THE SOUTH DAKOTA CROP PROGRESS AND  
CONDITION REPORT FOR THE WEEK ENDING APRIL 15TH, TOPSOIL MOISTURE  
WAS RATED 18 PERCENT SHORT OR VERY SHORT. THIS IS A 45 PERCENT  
IMPROVEMENT FROM FEBRUARY. SUBSOIL MOISTURE WAS RATED 37 PERCENT  
SHORT OR VERY SHORT. THIS IS A 26 PERCENT IMPROVEMENT FROM FEBRUARY.  
THE RECENT PATTERN CHANGE TO WETTER CONDITIONS HAS ADDED SOIL  
MOISTURE OVER THE PAST COUPLE MONTHS.  
 
AGRICULTURAL IMPACTS:  
THE LATEST CROP PROGRESS AND CONDITION REPORT RATED WINTER WHEAT  
CONDITIONS AT 20 PERCENT POOR OR VERY POOR. THIS IS A 12 PERCENT  
IMPROVEMENT FROM CONDITIONS IN LAST MONTH'S REPORT.  
 
RIVER AND STREAM FLOW CONDITIONS:  
MANY RIVERS AND STREAMS ACROSS THE REGION ARE STILL AFFECTED BY ICE,  
BUT THERE ARE SOME THAT ARE BEGINNING TO THAW AND ARE SHOWING NEAR TO  
ABOVE NORMAL STREAM FLOWS. THE BIG SIOUX RIVER NEAR AND SOUTH OF  
WATERTOWN HAS BEEN NEAR OR INTO MINOR FLOOD STAGE OFF AND ON OVER THE  
PAST MONTH, AND IS ONCE AGAIN APPROACHING FLOOD STAGE, OR AT LEAST  
FORECAST TO APPROACH FLOOD STAGE.  
 
FIRE DANGER IMPACTS:  
THE OVERALL WETTER CONDITIONS, COMBINED WITH FREQUENT PERIODS OF SNOW  
PACK HAVE LARGELY KEPT FIRE DANGER ON THE LOWER END THUS FAR IN  
SPRING.  
 
CLIMATE SUMMARY...  
 
MANY LOCATIONS SAW ABOVE NORMAL PRECIPITATION IN MARCH, GENERALLY UP  
TO A HALF INCH ABOVE NORMAL. ALTHOUGH, THERE REMAINED A FEW POCKETS  
OF OVERALL DRYNESS ACROSS CENTRAL SOUTH DAKOTA. AVERAGE TEMPERATURE  
WAS ANYWHERE FROM 1 TO 3 DEGREES BELOW NORMAL FOR MUCH OF THE AREA.  
THUS FAR IN APRIL, PRECIPITATION HAS BEEN ABOVE NORMAL ACROSS CENTRAL  
SOUTH DAKOTA, WHILE NORTHEAST SOUTH DAKOTA AND WEST CENTRAL MINNESOTA  
HAVE BEEN BELOW NORMAL. TEMPERATURES IN APRIL HAVE BEEN MUCH BELOW  
NORMAL THROUGH THE FIRST HALF OF THE MONTH. IN FACT, IT HAS BEEN THE  
RECORD COLDEST FIRST HALF OF APRIL IN RECORDED HISTORY ACROSS CENTRAL  
AND NORTHEAST SOUTH DAKOTA. FOR TEMPERATURES, THE AREA IS ABOUT 10 TO  
15 DEGREES BELOW NORMAL.  
 
PRECIPITATION/TEMPERATURE OUTLOOK...  
 
THE LATEST 8 TO 14 DAY OUTLOOK FROM THE CLIMATE PREDICTION CENTER  
SHOWS NEAR NORMAL TEMPERATURES, WITH NEAR TO BELOW NORMAL  
PRECIPITATION. THE LATEST ONE-MONTH OUTLOOK SHOWS EQUAL CHANCES FOR  
ABOVE OR BELOW NORMAL TEMPERATURES AND PRECIPITATION.  
 
HYDROLOGIC SUMMARY AND OUTLOOK...  
 
ACCORDING TO THE LATEST PROBABILISTIC HYDROLOGIC OUTLOOK ISSUED BY  
THE NATIONAL WEATHER SERVICE IN ABERDEEN, THE BIG SIOUX RIVER FROM  
WATERTOWN TO CASTLEWOOD HAS MODERATE TO VERY HIGH CHANCES OF REACHING  
MINOR FLOOD STAGE IN THE NEXT 90 DAYS. LOW TO MODERATE CHANCES EXIST  
FOR THIS RIVER TO REACH THE MODERATE FLOOD STAGE. FOR THE JAMES  
RIVER, MODERATE TO HIGH CHANCES EXIST FOR MINOR FLOODING IN THE NEXT  
90 DAYS. CHANCES FOR MODERATE FLOODING ARE GENERALLY 30 TO 40  
PERCENT.  
 
NEXT ISSUANCE DATE...  
 
THIS PRODUCT HAS NO SCHEDULED UPDATE SINCE NO COUNTIES IN THE  
ABERDEEN COUNTY WARNING AREA ARE IN D2 (SEVERE) DROUGHT. IF DROUGHT  
CONDITIONS WORSEN INTO D2, THEN ADDITIONAL DROUGHT INFORMATION  
STATEMENTS WILL BE ISSUED.  
 

 
 
RELATED WEB SITES...  
 
ADDITIONAL INFORMATION ON CURRENT DROUGHT CONDITIONS MAY BE FOUND AT  
THE FOLLOWING WEB ADDRESSES:  
 
US DROUGHT MONITOR...HTTP://DROUGHTMONITOR.UNL.EDU  
NATIONAL INTEGRATED DROUGHT INFORMATION SYSTEM...HTTP://WWW.DROUGHT.GOV  
NOAA DROUGHT PAGE...HTTP://WWW.CPC.NCEP.NOAA.GOV/PRODUCTS/DROUGHT  
HIGH PLAINS REGIONAL CLIMATE CENTER...HTTPS://HPRCC.UNL.EDU  
LOCAL WEATHER INFORMATION...HTTP://WWW.WEATHER.GOV/ABR  
USDA CROP INFORMATION...HTTP://WWW.NASS.USDA.GOV/INDEX.ASP  
SOUTH DAKOTA STATE CLIMATE OFFICE...HTTPS://CLIMATE.SDSTATE.EDU  
SDSU EXTENSION...HTTP://IGROW.ORG  
DROUGHT IMPACT REPORTER...HTTP://DROUGHTREPORTER.UNL.EDU/MAP  
 
ADDITIONAL RIVER INFORMATION...  
 
NATIONAL WEATHER SERVICE...HTTP://WATER.WEATHER.GOV  
US GEOLOGICAL SURVEY...HTTPS://WWW.USGS.GOV/WATER  
US ARMY CORPS OF ENGINEERS...HTTP://WWW.USACE.ARMY.MIL  
 
ACKNOWLEDGMENTS...  
 
THE DROUGHT MONITOR IS A MULTI-AGENCY EFFORT INVOLVING THE NATIONAL  
WEATHER SERVICE AND NATIONAL CENTERS FOR ENVIRONMENTAL INFORMATION,  
THE USDA, STATE AND REGIONAL CENTER CLIMATOLOGISTS AND THE NATIONAL  
DROUGHT MITIGATION CENTER. INFORMATION FOR THIS STATEMENT HAS BEEN  
GATHERED FROM NWS AND FAA OBSERVATION SITES, STATE COOPERATIVE  
EXTENSION SERVICES, THE USDA, USACE AND USGS.  
 
QUESTIONS OR COMMENTS...  
 
IF YOU HAVE QUESTIONS OR COMMENTS ABOUT THIS DROUGHT INFORMATION  
STATEMENT, PLEASE CONTACT:  
 
NATIONAL WEATHER SERVICE  
TRAVIS TARVER  
824 BROWN COUNTY 14S  
ABERDEEN SD 57401  
PHONE...605-225-0519  
TRAVIS.TARVER@NOAA.GOV  
 

 
TMT  
 
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