Drought Information Statement
Issued by NWS Riverton, WY

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AXUS75 KRIW 111201 RRA
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WYC003-013-017-019-023-025-029-035-037-039-043-301200-

DROUGHT INFORMATION STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
500 AM MST FRI NOV 11 2016

...RECORD OR NEAR OCTOBER RECORD PRECIPITATION ELIMINATES
REMAINING DROUGHT ACROSS NORTHWEST WYOMING...

SYNOPSIS...

A MUCH WETTER THAN NORMAL OCTOBER ACROSS WESTERN WYOMING
ELIMINATED REMAINING MODERATE /D1/ DROUGHT CONDITIONS OVER
NORTHWEST WYOMING. MODERATE TO SEVERE /D2/ DROUGHT REMAINED OVER
THE NORTHEAST CORNER OF WYOMING, WHERE OCTOBER WAS DRIER AND MUCH
WARMER THAN NORMAL.

THE SNAKE RIVER BASIN HAD THEIR WETTEST OCTOBER OVER THE LAST 122
YEARS WITH A BASIN-WIDE AVERAGE PRECIPITATION OF 6.78 INCHES, OR
320 PERCENT OF THE 20TH CENTURY AVERAGE. YELLOWSTONE BASIN HAD ITS
2ND WETTEST OCTOBER SINCE 1895 WITH BASIN-WIDE AVERAGE
PRECIPITATION OF 5.47 INCHES OR 291 PERCENT OF THE 20TH CENTURY
AVERAGE. OLD FAITHFUL SET A NEW RECORD FOR WETTEST OCTOBER WITH
8.18 INCHES OF PRECIPITATION, SHATTERING THE OLD RECORD OF 4.46
INCHES IN 1908.

SUMMARY OF IMPACTS...

RIVER AND STREAMFLOW CONDITIONS.

28 DAY AVERAGE STREAMFLOWS ACROSS WYOMING SHOWED MUCH ABOVE NORMAL
CONDITIONS ACROSS MOST OF WESTERN WYOMING WITH NEAR NORMAL TO
ABOVE NORMAL CONDITIONS ACROSS THE REST OF THE STATE.

FIRE WEATHER IMPACTS...

FUELS REMAINED CRITICALLY DRY AND SUSCEPTIBLE TO RAPID FIRE GROWTH ACROSS
NATRONA COUNTY AND SOUTHERN JOHNSON COUNTY WHERE UNSEASONABLY MILD
AND DRY CONDITIONS PREVAILED IN OCTOBER. TWO WEEK AND ONE MONTH
EVAPORATIVE DEMAND DROUGHT INDEX (EDDI) VALUES (A MEASURE OF THE
THIRST OF THE ATMOSPHERE) SHOWED FLASH DROUGHT CONDITIONS
POTENTIALLY DEVELOPING OVER THIS AREA AND MUCH OF EASTERN WYOMING.

CLIMATE SUMMARY...

BELOW ARE THE CUMULATIVE PRECIPITATION AMOUNTS FROM
SELECTED LOCATIONS ACROSS WEST AND CENTRAL WYOMING IN 2016.

NOTE: BASIN-WIDE PERCENT OF AVERAGES ARE BASED ON 20TH CENTURY
(1901-2000) AVERAGES. SPECIFIC LOCATIONS PERCENT OF AVERAGES ARE
BASED ON 1981-2010 NORMALS.

LOCATION               PRECIPITATION       % OF AVERAGE
AND DROUGHT            (INCHES)
CONDITION              JAN-OCT 2016
--------               -----------------    ---------

YELLOWSTONE BASIN AVG.    20.87                93
0 OLD FAITHFUL            21.85               110

SNAKE BASIN AVG.          27.67               106
  AFTON                   19.17               124
  MOOSE                   17.98               109

GREEN AND BEAR BASIN AVG. 14.38               124
  BIG PINEY AIRPORT       11.51               193
0 EVANSTON AIRPORT         6.93                66
  FOSSIL BUTTE N.M.       14.51               154
  GREEN RIVER             14.32               191
  ROCK SPRINGS (FIRE DP)  13.99               162

BIGHORN BASIN AVG.        14.47               110
  CODY                    11.63               119
  GREYBULL AIRPORT         6.82                98
  POWELL FIELD STATION     6.27                97
  THERMOPOLIS             13.90               133
  WORLAND AIRPORT          8.79               126

POWDER/TONGUE BASIN AVG.  13.97               101
  BUFFALO AIRPORT         11.55                92
  KAYCEE                  10.82                94
  SHERIDAN AIRPORT        14.67               114

LOWER PLATTE BASIN AVG    13.36                98
  CASPER AIRPORT          13.88               123
0 CHEYENNE AIRPORT        13.97                94

WIND RIVER BASIN AVG.     16.20               123
  DUBOIS                  10.95               121
  LANDER AIRPORT          18.90               168
  RIVERTON AIRPORT        13.09               152
  RIVERTON (DOWNTOWN)     13.56               175

UPPER PLATTE BASIN AVG.   11.98               104
  JEFFREY CITY            11.46               127
-------------------------------------------------
STATEWIDE AVERAGE         14.70               106

--------------------------------------------
| STATION`S DROUGHT INTENSITY (LEFT COLUMN):|
| 3 - LOCATION IN EXTREME DROUGHT/D3/       |
| 2 - LOCATION IN SEVERE DROUGHT /D2/       |
| 1 - LOCATION IN MODERATE DROUGHT /D1/     |
| 0 - LOCATION ABNORMALLY DRY /D0/          |
|   - NONE                                  |
|                                           |
| (M) MISSING PRECIPITATION DATA IN RECORD  |
--------------------------------------------

PRECIPITATION/TEMPERATURE OUTLOOKS...

LA NINA ADVISORY HAS BEEN ISSUED AS LA NINA CONDITIONS HAD
DEVELOPED ACROSS THE TROPICAL PACIFIC OCEAN IN OCTOBER. LA NINA
CONDITIONS ARE FAVORED TO PERSIST DURING WINTER 2016-17. THE
WINTER OUTLOOK FOR WYOMING CONSIDERS LA NINA CONDITIONS TO REMAIN
THROUGH THE PERIOD.

THE WINTER (DECEMBER-JANUARY-FEBRUARY) OUTLOOK FOR WYOMING SHOWS AN
ELEVATED CHANCE OF ABOVE NORMAL TEMPERATURES ACROSS ROUGHLY THE
SOUTHWEST THIRD OF THE STATE. THE REST OF THE STATE HAS EQUAL
CHANCES OF ABOVE NORMAL, NORMAL OR BELOW NORMAL TEMPERATURES; OR
NO CLEAR CLIMATE SIGNAL. THE WINTER PRECIPITATION OUTLOOK SHOWED
AN ELEVATED CHANCE OF ABOVE NORMAL PRECIPITATION ROUGHLY ALONG AND
NORTH OF A KEMMERER TO CASPER LINE WITH THE GREATER THAN 40
PERCENT CHANCE OF ABOVE NORMAL PRECIPITATION ALONG AND NORTH OF A
POWELL TO WEST YELLOWSTONE LINE.

THE SEASONAL DROUGHT OUTLOOK SHOWED NO AREAS OF DROUGHT
DEVELOPMENT ACROSS WEST AND CENTRAL WYOMING THROUGH THE END OF
JANUARY 2017.

HYDROLOGIC SUMMARY AND OUTLOOK...

RESERVOIR STORAGES ACROSS WYOMING WERE IN RELATIVELY GOOD
CONDITION FOR OCTOBER AND EARLY NOVEMBER. NOTABLE EXCEPTIONS
WERE PALISADES RESERVOIR (14 PERCENT FULL) AND GLENDO RESERVOIR
(38 PERCENT FULL).

RESERVOIR DATA FOR NOVEMBER 10TH -

RESERVOIR                  PERCENT FULL

CENTRAL WYOMING
   BOYSEN                      88.6
   BUFFALO BILL                70.5
   BULL LAKE                   22.0
   PATHFINDER                  83.8

UPPER GREEN RIVER BASIN
   BIG SANDY                   50.0
   FONTENELLE                  68.0
   FLAMING GORGE               85.0

UPPER SNAKE RIVER BASIN
   GRASSY LAKE                 85.0
   JACKSON LAKE                58.0

NEXT ISSUANCE DATE...

THIS PRODUCT WILL BE UPDATED IF NECESSARY IN RESPONSE TO
SIGNIFICANT CHANGES IN CONDITIONS.

&&

RELATED WEB SITES...

ADDITIONAL INFORMATION ON CURRENT DROUGHT CONDITIONS MAY BE FOUND AT
THE FOLLOWING WEB ADDRESSES /USE LOWER CASE LETTERS/...

TO REPORT EFFECTS OF THE DROUGHT IN YOUR AREA...PLEASE GO TO THE
DROUGHT IMPACT REPORTER AT...

HTTP://DROUGHTREPORTER.UNL.EDU/

...AND CLICK ON SUBMIT A REPORT.

INFORMATION FOR THE MEDIA MAY BE FOUND AT...

HTTP://DROUGHT.UNL.EDU/NEWSOUTREACH/INFORMATIONFORMEDIA.ASPX

NWS RIVERTON DROUGHT PAGE...
HTTP://WWW.WEATHER.GOV/RIW/DROUGHT

WIND RIVER INDIAN RESERVATION AND SURROUNDING AREA CLIMATE AND
DROUGHT SUMMARIES...

HTTP://REVAMPCLIMATE.COLOSTATE.EDU/REVAMP/PROJECT/WIND-RIVER-
DROUGHT-PREPAREDNESS

USGS WYOMING DROUGHT WATCH...
HTTP://WY.WATER.USGS.GOV/PROJECTS/DROUGHT/

U.S. DROUGHT MONITOR...HTTP://WWW.DROUGHT.GOV

NOAA DROUGHT PAGE...HTTP://WWW.DROUGHT.NOAA.GOV

CLIMATE PREDICTION CENTER /CPC/...HTTP://WWW.CPC.NCEP.NOAA.GOV

ADDITIONAL RIVER AND RESERVOIR INFORMATION...

NWS ADVANCED HYDROLOGIC PREDICTION SERVICE /AHPS/...
HTTP://WWW.WATER.GOV/AHPS2/INDEX.PHP?WFO=RIW

NRCS WYOMING...HTTP://WWW.WY.NRCS.USDA.GOV

USGS...HTTP://WATER.USGS.GOV/

USBR...HTTP://WWW.USBR.GOV/

WATER RESOURCE DATA SYSTEM (WRDS)...HTTP://WWW.WRDS.UWYO.EDU

ACKNOWLEDGMENTS...

THE DROUGHT MONITOR IS A MULTI-AGENCY EFFORT INVOLVING NOAA/S
NATIONAL WEATHER SERVICE AND NATIONAL CLIMATIC DATA CENTER...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 ANY QUESTIONS OR COMMENTS ABOUT THIS DROUGHT INFORMATION
STATEMENT...PLEASE CONTACT...

ARTHUR MEUNIER
CLIMATE/DROUGHT FOCAL POINT
NATIONAL WEATHER SERVICE
12744 WEST US HIGHWAY 26
RIVERTON, WY  82501
TELEPHONE...307-857-3898
............800-211-1448
EMAIL...ARTHUR.MEUNIER@NOAA.GOV

$$


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