016  
AXUS75 KRIW 142117  
DGTRIW  
 
DROUGHT INFORMATION STATEMENT  
NATIONAL WEATHER SERVICE RIVERTON WY  
311 PM MDT THU OCT 14 2021  
   
..AREAS OF EXTREME DROUGHT CONDITIONS PERSIST ACROSS WYOMING
 
 
.SYNOPSIS:  
 
.DROUGHT INTENSITY AND EXTENT:  
THE LATEST DROUGHT CONDITIONS AS REPORTED BY THE U.S. DROUGHT  
MONITOR, WHICH WAS UPDATED ON OCTOBER 14TH, NOTED THAT DROUGHT  
CONDITIONS CONTINUED TO COVER 100 PERCENT OF WYOMING OVER THE LAST  
MONTH. EXTREME (D3) DROUGHT CONDITIONS DOMINATED JOHNSON,  
NORTHEASTERN NATRONA, BIG HORN, NORTHEAST WASHAKIE, MOST OF PARK,  
NORTHEASTERN TETON, AND SOUTHERN SWEETWATER COUNTIES.  
 
SEVERE (D2) DROUGHT CONDITIONS REMAINED ACROSS NORTHWEST AND CENTRAL  
NATRONA, NORTHEASTERN WASHAKIE, HOT SPRINGS, EXTREME SOUTHERN PARK,  
TETON, SUBLETTE, LINCOLN, AND WESTERN AND NORTHERN SWEETWATER  
COUNTIES. MODERATE (D1) DROUGHT CONDITIONS STOOD FAST ACROSS  
FREMONT, NORTHEASTERN SWEETWATER, AND WESTERN AND SOUTHERN NATRONA  
COUNTIES.  
 
.TEMPERATURE AND PRECIPITATION:  
SINCE MID-SEPTEMBER THREE WIDELY TIMED COLD FRONTS HAVE MOVED ACROSS  
WYOMING. THOUGH THESE FRONTS HAVE BROUGHT SHORT PERIODS OF COOLER  
CONDITIONS, THE OVERALL TEMPERATURES ACROSS THE HSA WAS 1 TO 3  
DEGREES ABOVE NORMAL FOR THE PERIOD, EXCEPT FOR THE CENTRAL AREAS OF  
YELLOWSTONE NATIONAL PARK WHERE THE COOLEST TEMPERATURES WERE  
OBSERVED TO BE NEAR NORMAL TO ABOUT 2 DEGREES COOLER. THE WARMEST  
AREA WAS OBSERVED ACROSS SOUTHEAST JOHNSON COUNTY WITH AVERAGES  
AROUND 6 DEGREES WARMER THAN NORMAL.  
 
ONCE AGAIN, ABNORMALLY DRY CONDITIONS REMAINED ACROSS NORTHERN AND  
CENTRAL WYOMING DURING THE PAST MONTH WITH MOST AREAS REPORTING  
LESS THAN 70 PERCENT OF NORMAL RAINFALL. MOISTURE RETURNED TO THE  
SOUTHWEST WITH THE WETTEST AREAS AROUND SOUTHERN LINCOLN AND  
NORTHWEST SWEETWATER COUNTIES REPORTING 150 TO 200 PERCENT OF NORMAL  
PRECIPITATION. THE DRIEST AREAS WERE OBSERVED ACROSS NORTHWEST  
FREMONT, WESTERN HOT SPRINGS AND EASTERN BIG HORN COUNTIES WHERE  
LESS THAN 25 PERCENT OF NORMAL RAINFALL WAS RECORDED.  
 
. HYDROLOGIC CONDITIONS:  
COOLER TEMPERATURES AND INCREASED PRECIPITATION DURING THE SECOND  
WEEK OF OCTOBER ASSISTED IN IMPROVING THE STREAM FLOWS ACROSS THE  
GREEN AND WIND RIVER BASINS AS REPORTED BY THE CURRENT U.S.  
GEOLOGICAL SURVEY WATERWATCH REPORT. OTHERWISE, BELOW NORMAL STREAM  
FLOWS WERE RECORDED ACROSS THE REST OF THE RIVER BASINS ACROSS  
WESTERN AND CENTRAL WYOMING OVER THE PAST MONTH AS DRY AND WARM  
CONDITIONS PREVAILED OVER THE LAST FOUR WEEKS..  
 
RESERVOIR LEVELS ACROSS THE REGION CONTINUED TO DROP DUE TO THE LACK  
OF PRECIPITATION AND THE CONTINUED HIGH DEMAND FOR AGRICULTURE  
IRRIGATION ACROSS THE REGION. RESERVOIRS ACROSS NORTHERN AND CENTRAL  
WYOMING RANGED FROM 85 PERCENT FULL AT BOYSEN TO 15 PERCENT AT  
JACKSON LAKE, WITH SITES ACROSS THE SOUTH AVERAGING 92 PERCENT FULL  
AT ALCOVA TO 0 PERCENT AT BIG SANDY.  
 
.SUMMARY OF IMPACTS:  
   
AGRICULTURE IMPACTS
 
 
EVEN WITH A COUPLE OF COLD FRONTS MOVING ACROSS THE REGION,  
UNSEASONABLY WARM TEMPERATURES AND DRY CONDITIONS STILL PERSISTED  
DURING LATE SEPTEMBER AND THE EARLY OCTOBER. THOUGH THESE ONGOING  
DROUGHT CONDITIONS HAVE BEEN DETRIMENTAL TO THE REGIONAL CROPS OVER  
THE PAST SUMMER, IT HAS ASSISTED IN THE HARVESTING OF THE CROPS,  
ESPECIALLY THE SUGAR BEETS, WINTER WHEAT AND LATE SEASON ALFALFA HAY  
CROPS.  
 
THE OCTOBER 10TH, 2021 USDA WYOMING CROP PROGRESS AND CONDITION  
REPORTSHOWED SLIGHT IMPROVEMENTS OVER THE LAST FEW WEEKS AS 80  
PERCENT OF TOPSOIL MOISTURE ACROSS THE STATE WAS REPORTED AT THE  
SHORT TO VERY SHORT LEVELS, COMPARED TO 87 PERCENT THIS TIME LAST  
YEAR AND THE 5 YEAR AVERAGE OF 52 PERCENT. SUBSOIL MOISTURE REPORTS  
ALSO INDICATED SOME IMPROVEMENT OF CONDITIONS ACROSS THE REGION AS  
80 PERCENT WERE REPORTED AS BEING VERY SHORT TO SHORT ON MOISTURE,  
COMPARED TO 81 PERCENT A YEAR AGO AND A 5 YEAR AVERAGE OF 57 PERCENT.  
 
PASTURE AND RANGELAND CONDITIONS HAVE ALSO SHOWED A SLIGHT  
IMPROVEMENT OVER THE PAST MONTH AS AREAS ACROSS THE STATE HAVE BEEN  
RATED AT 62 PERCENT VERY POOR TO POOR, COMPARED TO 70 PERCENT THIS  
TIME LAST YEAR AND A 5 YEAR AVERAGE OF 32 PERCENT.  
   
FIRE DANGER IMPACTS
 
 
DRIER AND WARMER CONDITIONS DURING THE FIRST THREE WEEKS OF  
SEPTEMBER TURNED OVER TO A COOLER AND SLIGHTLY WETTER THAN NORMAL  
PATTERN BY THE SECOND WEEK OF OCTOBER WHICH PROVIDED MODERATE RELIEF  
TO THE FIRE DANGER ACROSS WYOMING. THE LATEST NATIONAL INTERAGENCY  
FIRE CENTER (NIFC) OBSERVED FIRE DANGER RATINGS SHOWED GENERAL  
IMPROVEMENT WITH LOW FIRE DANGER RATED ACROSS WYOMING.  
 
.DROUGHT MITIGATION ACTIONS:  
 
THE CONTINUED LACK OF GROUND SOAKING PRECIPITATION WITH ABOVE NORMAL  
TEMPERATURES, DRASTICALLY LOW SOIL MOISTURE, AND REDUCED LOCALLY  
STORED WATER SUPPLIES HAVE NEGATIVELY AFFECTED THE AGRICULTURE  
ACTIVITIES ACROSS WYOMING THIS GROWING SEASON. RECENTLY THE GOVERNOR  
OF WYOMING HAS SIGNED AN EXECUTIVE ORDER TO ALLOW MOTOR CARRIERS  
HAULING HAY TO OPERATE OUTSIDE REGULAR OPERATING HOURS AND TO CARRY  
LARGER LOADS TO ASSIST IN MOVING HAY TO DROUGHT AFFECTED AREAS  
WITHIN THE STATE TO TO OTHER STATES THAT HAVE DECLARED AN EMERGENCY  
FOR LIVESTOCK FEED.  
 
THOUGH THERE HAS BEEN SOME RELIEF OVER THE PAST WEEK WITH COOLER AND  
WETTER WEATHER CONDITIONS, IT WAS TOO LITTLE AND TOO LATE TO ASSIST  
IN OVERALL RANGE CONDITIONS THIS FALL. THE USDA AND THE WYOMING  
DEPARTMENT OF AGRICULTURE HAVE REPORTED THAT MANY RANCHERS ACROSS  
THE STATE HAVE REPORTED VERY POOR TO POOR RANGE CONDITIONS. THERE  
WERE ALSO A NUMBER OF REPORTS OF HAY SHORTAGES AND VERY HIGH PRICES  
FOR LIVESTOCK FEED. STOCK WATER SUPPLIES HAVE SEEN SOME IMPROVEMENT  
ACROSS THE STATE AND WERE REPORTED AS 58 PERCENT VERY SHORT TO SHORT  
THIS WEEK, COMPARED TO 83 PERCENT LAST MONTH.  
 
.LOCAL PRECIPITATION/TEMPERATURE OUTLOOK:  
 
THE LATEST CLIMATE PREDICTION CENTER`S (CPC) OUTLOOK THAT WAS  
UPDATED FOR THE REST OF OCTOBER NOW LEANS TOWARDS A BETTER THAN  
AVERAGE CHANCE OF ABOVE NORMAL TEMPERATURES ACROSS WYOMING, ALONG  
WITH A SLIGHTLY BETTER THAN AVERAGE CHANCE OF NEAR NORMAL  
PRECIPITATION, ESPECIALLY ACROSS THE SOUTHWEST. THE CPC SEASONAL  
OUTLOOKS FOR THE PERIOD OF NOVEMBER THROUGH JANUARY 2022 INDICATED A  
SLIGHTLY BETTER THAN AVERAGE CHANCE OF WARMER TEMPERATURES,  
ESPECIALLY ACROSS SOUTHERN AND CENTRAL WYOMING, WITH A SLIGHTLY  
BETTER THAN AVERAGE CHANCE OF NORMAL PRECIPITATION, AND SLIGHTLY  
WETTER ACROSS THE NORTHWEST.  
 
THE LATEST U.S. MONTHLY DROUGHT OUTLOOK FOR THE REST OF OCTOBER  
INDICATES THAT WIDESPREAD DROUGHT CONDITIONS WILL CONTINUE ACROSS  
MUCH OF WYOMING, WHILE THE RECENTLY UPDATED U.S. SEASONAL DROUGHT  
OUTLOOK FOR THE PERIOD OF NOVEMBER THROUGH DECEMBER KEEPS UP THE  
TENDENCY FOR CONTINUING CONDITIONS ACROSS THE STATE.  
 
.NEXT ISSUANCE DATE:  
 
THIS PRODUCT WILL BE UPDATED BY MID-NOVEMBER OR SOONER IF NECESSARY,  
IN RESPONSE TO SIGNIFICANT CHANGES IN CONDITIONS.  
 

 
 
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