Drought Information Statement
Issued by NWS Boise, ID
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000 AXUS75 KBOI 220212 DGTBOI AXUS75 KBOI DDHHMM DGTBOI IDC001-003-005-007-009-011-013-015-017-019-021-023-025-027-029-031- 033-035-037-039-041-043-045-047-049-051-053-055-057-059-061-063- 065-067-071-073-075-077-079-081-083-085-087-ORC001-025-045-221200- DROUGHT INFORMATION STATEMENT NATIONAL WEATHER SERVICE BOISE IDAHO 812 PM MDT SAT MAR 22 2015 ...DROUGHT CONTINUES ACROSS MUCH OF SOUTHERN IDAHO AND SOUTHEAST OREGON... SYNOPSIS... ACCORDING TO THE MARCH 17 U.S. DROUGHT MONITOR...IN SOUTHERN IDAHO ...MODERATE TO SEVERE DROUGHT (D1 AND D2 CLASSIFICATION) EXISTS ACROSS MUCH OF THE UPPER SNAKE PLAIN (MAINLY NORTH OF THE SNAKE RIVER)...THE WOOD RIVER AND LOST RIVER BASINS...ACROSS SOUTH CENTRAL IDAHO AND OWYHEE COUNTY...AND ACROSS MUCH OF WASHINGTON AND ADAMS COUNTIES. EXTREME DROUGHT (D3 CLASSIFICATION) EXISTS ACROSS FAR WESTERN OWYHEE COUNTY AND FAR SOUTHWEST WASHINGTON COUNTY. IN SOUTHEAST OREGON...EXTREME DROUGHT (D3 CLASSIFICATION) EXTENDS ACROSS HARNEY AND MALHEUR COUNTIES AND SOUTHERN BAKER COUNTY...WITH MODERATE TO SEVERE DROUGHT (D1 AND D2 CLASSIFICATION) ACROSS NORTHERN BAKER COUNTY. DROUGHT SEVERITY CLASSIFICATION POSSIBLE IMPACTS... (D1)MODERATE DROUGHT... SOME DAMAGE TO CROPS. SHORT TERM DRYNESS SLOWING PLANTING AND GROWTH OF CROPS AND PASTURES. SOME WATER SHORTAGES DEVELOPING OR IMMINENT. VOLUNTARY WATER USE RESTRICTIONS REQUESTED. (D2)SEVERE DROUGHT... CROPS OR PASTURE LOSSES LIKELY. WATER SHORTAGES COMMON. WATER RESTRICTIONS IMPOSED. (D3)EXTREME DROUGHT... MAJOR CROP OR PASTURE LOSSES. WIDESPREAD WATER SHORTAGES OR RESTRICTIONS. (D4)EXCEPTIONAL DROUGHT... EXCEPTIONAL AND WIDESPREAD CROP OR PASTURE LOSSES. SHORTAGES OF WATER IN RESERVOIRS...STREAMS AND WELLS CREATING WATER EMERGENCIES. THE SEASONAL OUTLOOK INDICATES THAT DROUGHT WILL PERSIST OR INTENSIFY THROUGH THE END OF MAY FOR AREAS THAT ARE ALREADY EXPERIENCING DROUGHT...EXCEPT FOR THE POSSIBILITY OF SOME IMPROVEMENT ACROSS EASTERN IDAHO. SUMMARY OF REPORTED IMPACTS... A NUMBER OF SMALLER RESERVOIRS IN SOUTH CENTRAL IDAHO ARE HOLDING BELOW AVERAGE STORAGE. IN EASTERN OREGON...LARGE RESERVOIRS ARE HOLDING WELL BELOW AVERAGE STORAGE. IN SOUTHEAST OREGON...MALHEUR COUNTY IRRIGATORS ARE FACING ANOTHER YEAR OF WELL BELOW NORMAL WATER ALLOTMENTS AND A SHORTENED IRRIGATION SEASON. LONG TERM DROUGHT HAS FORCED SOME RANCHERS OUT OF BUSINESS. NUMEROUS DROUGHT PERMIT WELLS ARE EXPECTED AGAIN THIS YEAR. OFFICIALS FOR THE OWYHEE RESERVOIR PROJECT ESTIMATE THE 50000 ACRES THAT NORMALLY RECEIVE IRRIGATION WATER WILL NOT RECEIVE ANY THIS YEAR. SOME FARMERS HAVE CHANGED CROPS OR ARE DRILLING WELLS TO MITIGATE DAMAGE. MORE CEREAL CROPS HAVE BEEN PLANTED IN LATE FEBRUARY AND EARLY MARCH BECAUSE THEY FINISH DURING THE FIRST PART OF JULY AND USE LESS WATER. THE OREGON GOVERNOR HAS SIGNED AN EMERGENCY DROUGHT DECLARATION FOR MALHEUR COUNTY. BAKER AND HARNEY COUNTIES IN OREGON HAVE STARTED THE PROCESS TO REQUEST DROUGHT DECLARATIONS. GROUND WATER IS BEING IMPACTED BY LONG TERM DROUGHT WITH OVERALL DECLINES IN THE SNAKE PLAIN AQUIFER. AQUIFER DECLINES ARE EVIDENT IN DECREASED REACH GAINS ON THE SNAKE RIVER BETWEEN MILNER AND KING HILL...IN ADDITION TO FALLING GROUND WATER DEPTHS. THE LATEST WATER SUPPLY FORECASTS FROM THE NORTHWEST RIVER FORECAST CENTER INDICATE WELL BELOW AVERAGE RUNOFF VOLUMES DURING THE APRIL THROUGH SEPTEMBER PERIOD FOR MUCH OF THE AREA. FOR MOST OF SOUTHEAST OREGON AND FAR SOUTHWEST IDAHO...ONLY 20 TO 35 PERCENT OF AVERAGE IS FORECAST. FOR THE CLEARWATER...SALMON...AND SNAKE RIVER HEADWATERS REGIONS...ABOUT 70 TO 90 PERCENT OF AVERAGE IS FORECAST. FORECASTS FOR THE REST OF IDAHO AND NORTHEAST BAKER COUNTY IN OREGON INDICATE ABOUT 50 TO 70 PERCENT OF AVERAGE. ACCORDING TO THE U.S. DEPARTMENT OF AGRICULTURE FARM SERVICE AGENCY...AS OF MARCH 18 2015...TWIN FALLS COUNTY AND OWYHEE COUNTY HAVE BEEN DESIGNATED AS PRIMARY DROUGHT DISASTER COUNTIES. CONTIGUOUS DROUGHT DISASTER COUNTIES IN IDAHO INCLUDE ADA...CASSIA ...ELMORE...GOODING...JEROME...AND ONEIDA. IN SOUTHEAST OREGON... BAKER...MALHEUR AND HARNEY ARE CONTIGUOUS DROUGHT DISASTER COUNTIES. ANY COUNTY DECLARED A PRIMARY OR CONTIGUOUS DISASTER COUNTY MAKES PRODUCERS IN THAT COUNTY ELIGIBLE FOR CERTAIN EMERGENCY AID. SEE THE U.S. DEPARTMENT OF AGRICULTURE WEB SITE IN THE RELATED WEB SITES SECTION BELOW FOR DETAILS. CLIMATE SUMMARY... AS OF MARCH 20...PRECIPITATION FOR THE 2015 WATER YEAR WAS BELOW AVERAGE FOR MOST OF EASTERN...SOUTH CENTRAL...AND FAR SOUTHWEST IDAHO...AS WELL AS FOR MALHEUR COUNTY AND WESTERN BAKER COUNTY IN OREGON. FOR THE REST OF IDAHO AND SOUTHEAST OREGON...WATER YEAR PRECIPITATION WAS GENERALLY NEAR NORMAL. NRCS SNOTEL DATA AS OF MARCH 20...FOR IDAHO INDICATED 40 TO 50 PERCENT OF MEDIAN SNOWPACK FOR THE SPOKANE BASIN AND PANHANDLE REGION...AND 20 TO 30 PERCENT OF MEDIAN FOR THE OWYHEE AND WEISER BASINS. OTHERWISE...BASIN SNOWPACK ACROSS THE REST OF IDAHO RANGED FROM ABOUT 55 TO 80 PERCENT OF MEDIAN...EXCEPT NEAR 90 PERCENT OF MEDIAN FOR THE SNAKE BASIN ABOVE PALISADES. ACROSS SOUTHEAST OREGON...SNOWPACK RANGED FROM 10 TO 35 PERCENT OF MEDIAN. AVERAGE TEMPERATURES OVER THE 60 DAY PERIOD FROM JANUARY 20 TO MARCH 20 WERE 5 TO 10 DEGREES ABOVE AVERAGE FOR THE SOUTHERN HALF OF IDAHO AND ACROSS SOUTHEAST OREGON. FOR THE NORTHERN HALF OF IDAHO... AVERAGE TEMPERATURES HAVE BEEN ABOUT 4 TO 6 DEGREES ABOVE AVERAGE FOR THE 60 DAY PERIOD. BELOW IS A LIST OF PRECIPITATION DATA FOR SELECTED LOCATIONS IN IDAHO AND SOUTHEAST OREGON FOR THE 2015 WATER YEAR. OCT 1 2014-MAR 19 2015 NORMAL DEPARTURE LAST TOTAL PRECIP(INCHES) VALUE FROM NORMAL YEAR BOISE 8.22 6.71 1.51 7.47 MCCALL 13.90 10.86 3.04 13.07 TWIN FALLS 4.41 5.56 -1.15 3.72 POCATELLO 3.64 5.97 -2.33 4.46 IDAHO FALLS 1.91 4.44 -2.53 4.71 CHALLIS 2.39 3.47 -1.08 2.37 STANLEY 10.45 9.17 1.28 12.13 LEWISTON 6.80 5.67 1.13 4.60 BAKER CITY, OR 3.43 4.38 -0.95 3.66 BURNS, OR 5.95 6.40 -0.45 3.85 ROME, OR 2.72 4.17 -1.45 1.11 PRECIPITATION AND TEMPERATURE OUTLOOK... THE OUTLOOK FOR THE REMAINDER OF MARCH FAVORS ABOVE NORMAL TEMPERATURES AND BELOW NORMAL PRECIPITATION ACROSS THE REGION. THE THREE MONTH OUTLOOK FOR APRIL THROUGH JUNE FAVORS ABOVE NORMAL TEMPERATURES. MEANWHILE...THERE ARE EQUAL CHANCES OF EITHER ABOVE NORMAL...NORMAL...OR BELOW NORMAL PRECIPITATION. HYDROLOGIC SUMMARY... AS OF MARCH 20...28 DAY AVERAGE STREAMFLOWS AT USGS GAGING STATIONS ACROSS NORTHERN IDAHO...MOST OF THE CENTRAL IDAHO MOUNTAINS...AND THE SNAKE RIVER HEADWATERS WERE NORMAL OR ABOVE NORMAL. ELSEWHERE... FOR THE SOUTHERN THIRD OF IDAHO AND SOUTHEAST OREGON...STREAMFLOWS RANGED FROM NORMAL TO WELL BELOW NORMAL...WITH A NUMBER OF STREAMGAGE FLOWS WITHIN THE 10 PERCENTILE CLASS FOR LOW FLOWS. MAJOR RESERVOIR SYSTEMS ACROSS IDAHO WERE GENERALLY HOLDING NEAR AVERAGE OR ABOVE AVERAGE STORAGE. A FEW OF THE SMALLER RESERVOIRS IN SOUTHERN IDAHO WERE ONLY HOLDING ABOUT 60 TO 80 PERCENT OF AVERAGE. OVERALL RESERVOIR STORAGE IN SOUTHEAST OREGON WAS WELL BELOW AVERAGE...WITH THE TWO LARGEST RESERVOIRS...OWYHEE AND WARMSPRINGS...ONLY HOLDING ABOUT 40 PERCENT OF AVERAGE. MARCH 1 2015 RESERVOIR DATA PERCENT OF CAPACITY PERCENT OF AVG IDAHO AMERICAN FALLS 80 103 ANDERSON RANCH 66 119 ARROWROCK 92 134 BEAR LAKE 44 96 BLACKFOOT 50 92 BROWNLEE 109 137 CASCADE 75 113 COEUR D ALENE 60 109 DEADWOOD 76 138 DWORSHAK 83 122 HENRYS LAKE 98 110 ISLAND PARK 86 111 LAKE LOWELL 55 93 LITTLE WOOD 57 98 LUCKY PEAK 81 197 MACKAY 72 108 MAGIC 32 84 MANN CREEK 67 144 MONTPELIER 63 141 OAKLEY 26 79 PALISADES 85 128 PEND OREILLE 39 77 PRIEST LAKE 66 138 RIRIE 60 118 SALMON FALLS 15 60 EASTERN OREGON OWYHEE 24 43 WARM SPRINGS 18 42 BEULAH 47 88 BULLY CREEK 40 73 UNITY 80 139 PHILLIPS 33 69 THIEF VALLEY 80 91 NEXT ISSUANCE DATE... UPDATES TO THIS PRODUCT WILL BE MADE ON A MONTHLY BASIS. THE NEXT ISSUANCE OF THE DROUGHT INFORMATION STATEMENT WILL OCCUR IN LATE APRIL. RELATED WEB SITES... U.S. DROUGHT PORTAL: HTTP://WWW.DROUGHT.GOV NATIONAL DROUGHT MITIGATION CENTER: HTTP://DROUGHT.UNL.EDU STREAM FLOWS: AHPS HTTP://WATER.WEATHER.GOV/AHPS USGS HTTP://WATERWATCH.USGS.GOV NWS WATER SUPPLY FORECASTS: HTTP://WWW.NWRFC.NOAA.GOV HTTP://WWW.CBRFC.NOAA.GOV NRCS WATER SUPPLY FORECASTS: HTTP://WWW.WCC.NRCS.USDA.GOV/WSF/WSF.HTML IDAHO DEPARTMENT OF WATER RESOURCES: HTTP://WWW.IDWR.IDAHO.GOV OREGON WATER RESOURCES DEPARTMENT (DROUGHT INFORMATION): HTTP://WWW.OREGON.GOV/OWRD/PAGES/WR/DROUGHT.ASPX LONG TERM WEATHER AND CLIMATE OUTLOOKS: HTTP://WWW.CPC.NCEP.NOAA.GOV WESTERN REGION CLIMATE CENTER (CLIMATE ANOMALY MAPS): HTTP://WWW.WRCC.DRI.EDU/MONITORING-MAPS/ NATIONAL INTERAGENCY COORDINATION CENTER (FIRE DANGER AND OUTLOOKS): HTTP://WWW.NIFC.GOV/NICC RESERVOIR INFORMATION: NRCS HTTP://WWW.WCC.NRCS.USDA.GOV/WSF/WSF-RESERVOIR.HTML BUREAU OF RECLAMATION HTTP://WWW.USBR.GOV/PN/HYDROMET/SELECT.HTML UNITED STATES DEPARTMENT OF AGRICULTURE: DISASTER ASSISTANCE HTTP://WWW.USDA.GOV/WPS/PORTAL/USDA/USDAHOME ACKNOWLEDGEMENTS... THE DROUGHT MONITOR IS A MULTI-AGENCY EFFORT INVOLVING NOAA/S NATIONAL WEATHER SERVICE AND NATIONAL CLIMATIC DATA CENTER...THE US DEPARTMENT OF AGRICULTURE...STATE AND REGIONAL CENTERS... CLIMATOLOGISTS...AND THE NATIONAL DROUGHT MITIGATION CENTER. INFORMATION FOR THIS STATEMENT HAS BEEN GATHERED FROM THE NWS AND FFA OBSERVATION SITES...STATE AGENCIES...USDA...NRCS...USACE AND USGS. QUESTIONS OR COMMENTS... IF YOU HAVE QUESTIONS OR COMMENTS ABOUT THIS DROUGHT INFORMATION STATEMENT PLEASE CONTACT... NATIONAL WEATHER SERVICE 3833 SOUTH DEVELOPMENT AVENUE BOISE ID 83705-5354 PHONE: 208-334-9860 EMAIL: W-BOI.WEBMASTER@NOAA.GOV $$

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Boise Weather Forecast Office
NIFC Building 3807
Boise, ID 83705-5354
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Page last modified: 22-Mar-2015 2:12 AM
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