Drought Information Statement
Issued by NWS Boise, ID
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000 AXUS75 KBOI 202059 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-ORC001-025-045-210700- DROUGHT INFORMATION STATEMENT NATIONAL WEATHER SERVICE BOISE IDAHO 159 PM MST FRI FEB 20 2015 ...DROUGHT CONTINUES ACROSS MUCH OF SOUTHERN IDAHO AND SOUTHEAST OREGON... SYNOPSIS... ACCORDING TO THE FEBRUARY 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...EXTENDING NORTH NEAR THE OREGON BORDER ACROSS WESTERN WASHINGTON AND WESTERN 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 DROUGHT OUTLOOK THROUGH MARCH 31 2015 INDICATES DROUGHT WILL CONTINUE FOR AREAS THAT ARE ALREADY EXPERIENCING DROUGHT...AND SOME EXPANSION OF DROUGHT CONDITIONS IS LIKELY IN NORTHERN IDAHO. SUMMARY OF REPORTED IMPACTS... A NUMBER OF SMALLER RESEVOIRS IN SOUTH CENTRAL IDAHO ARE HOLDING BELOW NORMAL STORAGE. IN EASTERN OREGON...MOST OF THE LARGE RESERVOIRS ARE HOLDING WELL BELOW NORMAL STORAGE. 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. WATER SUPPLY CONCERNS HAVE INCREASED FOR SOME DUE TO MUCH OF THE WINTER PRECIPITATION FALLING AS RAIN INSTEAD OF SNOW. WELL BELOW NORMAL SNOWPACK ACROSS EASTERN OREGON AND FAR SOUTHWEST IDAHO HAVE IRRIGATORS VERY CONCERNED...PARTICULARLY THOSE THAT RELY ON OWYHEE RESERVOIR OR NATURAL STREAMFLOW. ACCORDING TO THE U.S. DEPARTMENT OF AGRICULTURE FARM SERVICE AGENCY...IN 2015 TWIN FALLS COUNTY HAS BEEN DESIGNATED AS A PRIMARY DROUGHT DISASTER COUNTY. CONTIGUOUS DROUGHT DISASTER COUNTIES IN IDAHO INCLUDE CASSIA...ELMORE...GOODING...JEROME...ONEIDA AND OWYHEE...AND HARNEY AND MALHEUR COUNTIES IN SOUTHEAST OREGON. 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 FEBRUARY 20...PRECIPITATION FOR THE 2015 WATER YEAR WAS BELOW AVERAGE FOR MOST OF EASTERN AND SOUTH CENTRAL IDAHO...AND ACROSS MOST OF MALHEUR COUNTY AND WESTERN BAKER COUNTY IN OREGON. ELSEWHERE...PRECIPITATION HAS BEEN NEAR OR ABOVE NORMAL. NRCS SNOTEL DATA FOR IDAHO INDICATED AROUND 55 PERCENT OF MEDIAN SNOWPACK FOR THE SPOKANE BASIN AND PANHANDLE REGION...AND 38 TO 46 PERCENT OF MEDIAN FOR THE WEISER AND OWYHEE BASINS. OTHERWISE... BASIN SNOWPACK ACROSS THE REST OF IDAHO RANGED FROM ABOUT 75 TO 110 PERCENT OF MEDIAN. ACROSS SOUTHEAST OREGON...SNOWPACK RANGED FROM 37 TO 53 PERCENT OF MEDIAN. JANUARY TEMPERATURES WERE SEVERAL DEGREES ABOVE AVERAGE FOR ALMOST ALL OF IDAHO AND SOUTHEAST OREGON. SINCE THE BEGINNING OF FEBRUARY...TEMPERATURES ACROSS CENTRAL AND SOUTHERN IDAHO...AND SOUTHEAST OREGON HAVE BEEN ABOUT 10 TO 15 DEGREES ABOVE NORMAL...AND ABOUT 5 TO 10 DEGREES ABOVE NORMAL FOR NORTHERN IDAHO. BELOW IS A LIST OF PRECIPITATION DATA FOR SELECTED LOCATIONS IN IDAHO AND SOUTHEAST OREGON FOR THE 2015 WATER YEAR. OCT 1 2014-FEB 19 2015 NORMAL DEPARTURE LAST TOTAL PRECIP(INCHES) VALUE FROM NORMAL YEAR BOISE 8.01 5.54 2.47 5.78 MCCALL 12.89 9.11 3.78 8.27 TWIN FALLS 4.37 4.80 -0.43 2.67 POCATELLO 3.36 4.83 -1.47 2.97 IDAHO FALLS 1.91 3.68 -1.77 2.07 CHALLIS 2.36 2.84 -0.48 1.78 STANLEY 9.95 7.60 2.35 9.82 LEWISTON 6.16 4.71 1.45 3.32 BAKER CITY, OR 3.19 3.70 -0.51 2.75 BURNS, OR 5.65 5.36 0.29 3.04 ROME, OR 2.35 3.34 -0.99 0.92 PRECIPITATION AND TEMPERATURE OUTLOOK... THE OUTLOOK FOR THE REMAINDER OF FEBRUARY FAVORS NEAR NORMAL TEMPERATURES AND ABOVE NORMAL PRECIPITATION ACROSS THE REGION. THE THREE MONTH OUTLOOK FOR MARCH THROUGH MAY FAVORS ABOVE NORMAL TEMPERATURES. MEANWHILE...PROBABILITIES FAVOR ABOVE NORMAL PRECIPITATION FOR EASTERN IDAHO...AND EQUAL CHANCES OF EITHER ABOVE NORMAL...NORMAL...OR BELOW NORMAL PRECIPITATION ELSEWHERE. HYDROLOGIC SUMMARY... AS OF FEBRUARY 20...28 DAY AVERAGE STREAMFLOWS AT USGS GAGING STATIONS IN IDAHO WERE NORMAL OR ABOVE NORMAL NORTH OF THE SNAKE RIVER PLAIN AND IN THE SNAKE RIVER HEADWATERS REGION. FOR THE REST OF SOUTHERN IDAHO AND SOUTHEAST OREGON...STREAMFLOWS WERE GENERALLY A MIX OF BELOW NORMAL AND NORMAL. 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 50 PERCENT OF AVERAGE. MAJOR RESERVOIRS IN SOUTHEAST OREGON WERE WELL BELOW AVERAGE...EXCEPT FOR THIEF VALLEY AND UNITY RESERVOIRS WHICH WERE NEAR OR A LITTLE BELOW NORMAL. FEBRUARY 1 2015 RESERVOIR DATA PERCENT OF CAPACITY PERCENT OF AVG IDAHO AMERICAN FALLS 71 106 ANDERSON RANCH 58 101 ARROWROCK 91 141 BEAR LAKE 42 94 BLACKFOOT 48 91 BROWNLEE 115 137 CASCADE 68 103 COEUR D ALENE 65 160 DEADWOOD 71 130 DWORSHAK 75 111 HENRYS LAKE 98 110 ISLAND PARK 82 110 LAKE LOWELL 24 43 LITTLE WOOD 41 75 LUCKY PEAK 33 93 MACKAY 63 107 MAGIC 20 55 MANN CREEK 28 86 MONTPELIER 60 140 OAKLEY 23 76 PALISADES 81 124 PEND OREILLE 34 71 PRIEST LAKE 42 89 RIRIE 57 118 SALMON FALLS 11 47 EASTERN OREGON OWYHEE 17 35 WARM SPRINGS 10 27 BEULAH 29 67 BULLY CREEK 22 54 UNITY 39 84 PHILLIPS 23 52 THIEF VALLEY 80 98 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 MARCH. 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, ID 83705-5354
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