Drought Information Statement
Issued by NWS Boise, ID
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000 AXUS75 KBOI 021706 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-ORC001-025-045-030600- DROUGHT INFORMATION STATEMENT NATIONAL WEATHER SERVICE BOISE IDAHO 1105 AM MDT THU JUL 2 2015 ...DROUGHT PERSISTS ACROSS IDAHO AND SOUTHEAST OREGON... SYNOPSIS... ACCORDING TO THE JUNE 30TH U.S. DROUGHT MONITOR...MODERATE DROUGHT (D1) TO SEVERE DROUGHT (D2) EXISTS ACROSS NORTHERN IDAHO. ACROSS CENTRAL...SOUTH CENTRAL AND SOUTHWEST IDAHO...MODERATE DROUGHT (D1) TO SEVERE DROUGHT (D2) PREVAIL...WITH MUCH OF OWYHEE COUNTY AND ADAMS COUNTY IN EXTREME DROUGHT (D3). IN FAR EAST AND SOUTHEAST IDAHO...ABNORMALLY DRY (D0) CONDITIONS PREVAIL. IN SOUTHEAST OREGON...EXTREME DROUGHT (D3) EXTENDS ACROSS HARNEY...MALHEUR AND SOUTHERN BAKER COUNTY...WITH SEVERE DROUGHT (D2) ACROSS NORTHERN BAKER COUNTY. THE SEASONAL OUTLOOK FROM THE CLIMATE PREDICTION CENTER INDICATES THAT DROUGHT WILL PERSIST OR INTENSIFY THROUGH THE SUMMER MONTHS ACROSS IDAHO AND SOUTHEAST OREGON. DROUGHT SEVERITY CLASSIFICATION POSSIBLE IMPACTS... (D0)ABNORMALLY DRY...GOING INTO DROUGHT. SHORT TERM DRYNESS SLOWING PLANTING AND GROWTH OF CROPS OR PASTURES. COMING OUT OF DROUGHT. SOME LINGERING WATER DEFICITS. PASTURES OR CROPS NOT FULLY RECOVERED. (D1)MODERATE DROUGHT...SOME DAMAGE TO CROPS AND PASTURES. STREAMS...RESERVOIRS OR WELLS LOW. 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. SUMMARY OF REPORTED IMPACTS... SNAKE RIVER PLAIN AQUIFER LEVELS CONTINUE TO DROP. RESEARCHERS WITH THE U.S. GEOLOGICAL SURVEY STATED IN A RECENT REPORT THAT THE EASTERN SNAKE RIVER PLAIN AQUIFER LEVEL HAS DROPPED BELOW TWO WELLS...AND ABOUT A DOZEN OTHERS ARE IN DANGER OF GOING DRY. A SPRING AT BOUNDARY CREEK ALONG THE MIDDLE FORK OF THE SALMON RIVER HAS GONE DRY AND PEOPLE ARE ADVISED TO BRING ALL WATER NEEDED WITH THEM TO THE BOUNDARY CREEK BOAT LAUNCH. THE EARLY LOSS OF SNOWPACK COMBINED WITH LACK OF SPRING PRECIPITATION CAN BE SEEN IN THE REMARKABLY LOW FLOWS ON MANY OF THE REGIONS STREAMS AND RIVERS...MANY OF WHICH ARE AT LEVELS WE WOULD TYPICALLY SEE IN AUGUST. WILDFIRE SEASON IS WEEKS AHEAD OF SCHEDULE FOR MUCH OF THE REGION. LAND MANAGEMENT AGENCIES ARE ALREADY IMPLEMENTING FIRE RESTRICTIONS AND BURN BANS. THE NATIONAL INTERAGENCY FIRE CENTER PREDICTIVE SERVICES INDICATES THAT SIGNIFICANT WILDLAND FIRE POTENTIAL FOR JULY AND AUGUST IS ABOVE NORMAL FOR NORTHERN...WEST CENTRAL AND SOUTHWEST IDAHO...AS WELL AS SOUTHEAST OREGON. MANY EASTERN OREGON FARMERS HAVE HAD TO ADJUST THEIR CROPS TO ACCOMMODATE DROUGHT. GIVEN THE MULTIPLE YEAR DROUGHT...LOW WATER STORAGE AND LOW STREAM FLOWS...PRODUCERS HAVE BEEN MAKING ADJUSTMENTS ABOUT WATER USE AND CROP ROTATIONS. SOME FARMERS ARE LEAVING SEVERAL HUNDRED ACRES UNPLANTED OR FALLOWED THIS YEAR AND SOME ANTICIPATE BEING OUT OF WATER BY THE MIDDLE OF JULY. WATER SUPPLY FORECASTS FROM THE NORTHWEST RIVER FORECAST CENTER INDICATE BETWEEN 40 AND 70 PERCENT OF AVERAGE RUNOFF VOLUMES ACROSS MOST OF IDAHO FOR THE APRIL THROUGH SEPTEMBER PERIOD. RUNOFF VOLUMES BETWEEN 15 AND 50 PERCENT OF AVERAGE ARE EXPECTED ACROSS SOUTHEAST OREGON. FORECASTS FOR SOME LOCATIONS IN THE UPPER SNAKE HEADWATERS IN FAR EASTERN IDAHO ARE FOR 80 TO 100 PERCENT OF AVERAGE...BUT THOSE ARE THE EXCEPTION. STATE DROUGHT EMERGENCY DECLARATIONS HAVE BEEN DECLARED FOR BLAINE ...BUTTE...CUSTER...FREMONT...LINCOLN AND TETON COUNTIES IN IDAHO. IN OREGON...STATE DECLARATIONS HAVE BEEN DECLARED FOR BAKER...HARNEY AND MALHEUR COUNTIES. ACCORDING TO THE U.S. DEPARTMENT OF AGRICULTURE FARM SERVICE AGENCY ...AS OF JULY 1 2015...ADAMS...BLAINE...BUTTE...CAMAS...CANYON... CLARK...CUSTER...ELMORE...FREMONT...GOODING...JEFFERSON...JEROME ...LINCOLN...MINIDOKA...OWYHEE...PAYETTE...TWIN FALLS AND WASHINGTON COUNTIES HAVE BEEN DESIGNATED AS PRIMARY DROUGHT DISASTER COUNTIES IN IDAHO. CONTIGUOUS DROUGHT DISASTER COUNTIES IN IDAHO INCLUDE ADA...BINGHAM...BOISE...BONNEVILLE...CASSIA...GEM...IDAHO...LEMHI ...MADISON...NEZ PERCE...ONEIDA...POWER...TETON AND VALLEY. IN SOUTHEAST OREGON...BAKER...HARNEY AND MALHEUR COUNTIES ARE PRIMARY DROUGHT DISASTER COUNTIES. CLIMATE SUMMARY... PRECIPITATION FOR THE 2015 WATER YEAR TO DATE (OCTOBER 1 TO JULY 1) WAS BETWEEN 80 AND 100 PERCENT OF NORMAL FOR THE MAJORITY OF IDAHO AND SOUTHEAST OREGON. A PATCHWORK OF AREAS RECEIVED 50 TO 80 PERCENT OF NORMAL...AND 100 TO 120 PERCENT OF NORMAL. ALTHOUGH WATER YEAR PRECIPITATION MAY NOT BE TOO FAR BELOW NORMAL FOR MUCH OF IDAHO AND SOUTHEAST OREGON...THE REGION IS HIGHLY DEPENDENT ON SNOWPACK. WELL ABOVE NORMAL WINTER AND EARLY SPRING TEMPERATURES CAUSED MORE PRECIPITATION TO FALL AS RAIN INSTEAD OF SNOW...RESULTING IN WELL BELOW NORMAL SNOWPACK FOR MOST OF THE AREA. ADDITIONALLY...SNOWPACK WAS LOST AS MUCH AS 4 TO 8 WEEKS EARLIER THAN AVERAGE ACROSS MUCH OF THE REGION. PRECIPITATION FOR THE APRIL THROUGH JUNE PERIOD ACROSS THE NORTHERN HALF OF IDAHO WAS BETWEEN 25 AND 50 PERCENT OF NORMAL...WHILE MUCH OF SOUTHWEST IDAHO AND SOUTHEAST OREGON RECEIVED ONLY 50 TO 80 PERCENT OF NORMAL. SOUTHERN MALHEUR COUNTY IN SOUTHEAST OREGON...AND EASTERN IDAHO WERE THE EXCEPTIONS...WITH 100 TO 150 PERCENT OF NORMAL PRECIPITATION DURING THE PERIOD...MOST OF WHICH FELL IN DURING THE MONTH OF MAY AVERAGE TEMPERATURES FOR MOST OF IDAHO AND SOUTHEAST OREGON WERE 6 TO 10 DEGREES (F) ABOVE AVERAGE FOR THE MONTH OF JUNE. BELOW IS A LIST OF PRECIPITATION DATA FOR SELECTED LOCATIONS IN IDAHO AND SOUTHEAST OREGON FOR THE 2015 WATER YEAR. OCT 1 2014-JULY 1 2015 NORMAL DEPARTURE LAST TOTAL PRECIP(INCHES) VALUE FROM NORMAL YEAR BOISE 10.87 10.58 0.29 11.28 MCCALL 18.34 17.82 0.52 19.26 TWIN FALLS 7.40 9.51 -2.11 6.92 POCATELLO 7.30 10.04 -2.74 7.51 IDAHO FALLS 6.87 8.51 -1.64 5.14 CHALLIS 4.30 7.70 -3.40 3.81 STANLEY 15.52 14.77 0.75 16.87 LEWISTON 10.28 10.29 -0.01 7.77 BAKER CITY, OR 6.74 8.22 -1.48 6.04 BURNS, OR 8.56 9.72 -1.16 6.37 ROME, OR 7.20 7.81 -0.61 2.35 PRECIPITATION AND TEMPERATURE OUTLOOK... THE THREE MONTH OUTLOOK FROM THE CLIMATE PREDICTION CENTER FOR JULY THROUGH SEPTEMBER FAVORS ABOVE NORMAL TEMPERATURES. PROBABILITIES SLIGHTLY FAVOR ABOVE NORMAL PRECIPITATION FOR EASTERN IDAHO...WITH EQUAL CHANCES OF EITHER ABOVE NORMAL...NORMAL...OR BELOW NORMAL PRECIPITATION ELSEWHERE ACROSS IDAHO AND SOUTHEAST OREGON. HYDROLOGIC SUMMARY... AS OF JULY 1...28 DAY AVERAGE STREAMFLOWS AT USGS GAGING STATIONS ACROSS WEST CENTRAL AND NORTHERN IDAHO WERE WITHIN THE 10 PERCENTILE CLASS FOR LOW FLOWS...OR AT NEW LOWS FOR THIS TIME OF YEAR. ACROSS THE REMAINDER OF IDAHO AND SOUTHEAST OREGON...28 DAY AVERAGE STREAMFLOWS WERE A MIX OF NORMAL TO MUCH BELOW NORMAL...WITH NON REGULATED STREAMFLOWS EITHER IN THE 10 TO 24 PERCENTILE...OR WITHIN THE 10 PERCENTILE CLASS FOR LOW FLOWS. MAJOR RESERVOIR SYSTEMS ACROSS IDAHO WERE GENERALLY HOLDING NEAR AVERAGE STORAGE. MANY OF THE SMALLER RESERVOIRS IN SOUTH CENTRAL AND SOUTHWEST IDAHO WERE ONLY HOLDING BETWEEN 30 TO 60 PERCENT OF AVERAGE. OVERALL RESERVOIR STORAGE IN SOUTHEAST OREGON WAS WELL BELOW AVERAGE...WITH THE TWO LARGEST RESERVOIRS...OWYHEE AND WARMSPRINGS...ONLY HOLDING ABOUT 20 PERCENT OF AVERAGE. JULY 1 2015 RESERVOIR DATA PERCENT OF CAPACITY PERCENT OF AVG IDAHO AMERICAN FALLS 60 78 ANDERSON RANCH 90 103 ARROWROCK 66 89 BEAR LAKE 50 89 BLACKFOOT 60 89 BROWNLEE 97 99 CASCADE 87 91 COEUR D ALENE 97 100 DEADWOOD 91 97 DWORSHAK 94 97 HENRYS LAKE 97 102 ISLAND PARK 79 85 LAKE LOWELL 71 112 LITTLE WOOD 48 57 LUCKY PEAK 100 102 MACKAY 74 99 MAGIC 27 42 MANN CREEK 48 57 MONTPELIER 101 135 OAKLEY 26 61 PALISADES 94 109 PEND OREILLE 97 99 PRIEST LAKE 102 99 RIRIE 79 92 SALMON FALLS 13 32 EASTERN OREGON OWYHEE 14 20 WARM SPRINGS 8 17 BEULAH 25 39 BULLY CREEK 38 25 UNITY 65 87 PHILLIPS 31 40 THIEF VALLEY 74 69 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 AUGUST. 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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National Weather Service
Boise Weather Forecast Office
NIFC Building 3807
Boise, ID 83705-5354
(208) 334-9860
Page last modified: 2-Jul-2015 5:06 PM
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