march 1, 2014 - idaho · 2014. 3. 14. · 70 february 1 & march 1 snow water content compared to...

Natural Resources Conservation Service

Idaho Water Supply Outlook Report March 1, 2014

I daho S N O T E L Cur-ren t Snow W a t e.r Equiv-a le.nt (SW E) % of N ormal

H a r 01 # 2014 Currem. SAOW' Watef' EQuivateol ($WE) e-.in.wkk Pero,e,.nc of 1N1 -2

February SNOTEL Precipitation as % of AverageW e stwi d e S N O T E L Cur r e n t M o n t h to D ate P recip i tait i o n ° ,1:, o f N o r mal

Ma r 0 1, 2014 _ C u n-ient M onth • -to o.11e PJ'@CCI tt.111on B~no-..,d• P 6> ~ t of -ree-a-2010 AY'Ol"':ag o

O u n s V31b"t);le "'

. =150"" oec:.r:.n~o"t-.;r ~c, J>«.fOi1 or~-.~,t ,;n,rnpo,:-~ o!~.._ .,,,.)91

USDA

~ NRCS

I IL_

I I

Prcp:in:,d by the- U S[).fd,,IRCS H .:i:6cr..:.i' ~ ~ C Oir.:w:ie C:rter Porl:bnd. ~90"' M:p:!~ .--- ~ .~4~:n,~~ Ebr;od on d.::ib ~ h~ • ....:c.r~ .. ....s.e~ ;i0,Wrc~ SdcarcC> CCM'IOICr j lffl.M:;aT0!'1t!F-Ct~Jll,GO' ~ -' '14 lOL7

Idaho SNOTEL Precipitation March 1-14 compared to normal March Total are:

• 130% in Weiser• 90-120% north, central,

Upper Snake, Oakley,• 60-75% Little Lost,

Salmon Falls, Bruneau, Bear

• 81% Owyhee

Total Precipitation Anomaly: 01 March 2014 - 11 March 2014

% of Average Precipitation

• o O so-10 . ,so. 110 - 1 - 10 LJ 70-90 - 170-200

- 11-20 LJ 90-110 -200-300

• 20 - 30 D 110- 130 • 300. , 00 - 30 -50 D 130- 1S0 - > 400

Period endi ng 7 Al\1 EST tl Mn r 201'1 Bns e pe ri od : 1981-2010

(Mop c r ented 12 Mnr 2014)

t

Daily Mean ,I em.perature Ano11u1 ly: tll Mar ch 2€114 - 11 Ma:rc·h 2014

Tern perature Anomaly rFJ

• ,:. ·e D s i - 5 1 - 16 3Di 1-1 a • 1:,, o D 1 1 • 10 1i - 10 7 L_j 1 J - 13 16

1111 :,, 1~

P [' dm~ [' II clli II M" '1 A.M ~:s~~ H /Iii 111" :!014 Dase per.~od: l98 Jl-20.ll0

(I\1a.p C l' eat e d 1 .... Mar 20U.)

W estvvi de SNOTEL Curren t Snow W ater Equivalent (SW E) O/o of Normal

M ar- 1 3 , Current Snow Water E qulvale n t (SWE) BasJn._wide Perc e n t o f 1981-201 0 Median

0 u navailabl e • . < 50%

0 50-69%

0 70-89%

D oo- 109%

0 110 - 1 29%

. 1 30- 1 49% •>= 1 50% ~ Dara un.ava.l'la!ll e

a r a.me or pc.stNl,g or m ea;S;Vre.rnenr t.s 11or represen..ta.:?rve a r -!!tfs r.me or year

ProvisionaI data s u b j ect to r evision

USDA -'9, NRCS ----====--------Mlle& 0 75 , ~o 300

Spring and Summer Streamflow Forecasts as of March 1, 2014 Percent of 1981-2010 A verage

• > 180 • 150 - 180 • 130 - 149 0 110 - 129

• 90 - 109 0 70 • 89

0 50 - 69

• 25 - 49 •

February SWE Increase:

Clearwater Basin - 2nd greatest February increase since 1981; only February 1999 had a bigger increase.

Boise Basin - 4th greatest February increase since 1961; only years 1986, 1999, and 1972 received more.

Snake abv Jackson Lake, Hoback, Greys, Salt, Gros Ventre – 2nd greatest since 1961 only 1986 had more.

Lewis Lake Divide – 5th highest February increase since records start in 1919

As of March 13, 34.3”

70 February 1 & March 1 Snow Water Content compared to Average Monthly Values

65 Lewis Lake Divide SNOTEL Site, Yellowstone NP, Wyoming· Years 1919-2014*

60

-II) 55 (I) ~ u 50 C

• March 1, 2014 SWE was 28.2" 1 Apr 1 Snow Water Content I- • Only 1.3" less than April 1 median 1 Mar 1 Snow Water Content • February SWE accumulation was I-1 Feb 1 Snow Water Content the 5th highest since record starts 1919

·--..., 45 C (I)

c 40 "

April 1 Median = 29.5 I '

0 0 35 Mar 1 Median = 25.1 -~ I,. (I) ...,

30 m ~

11 I I • . • I I I . I I I I

I I • I I I I I I I - • - I I I I I I I

~ 25 0 C 20 Cl)

Feb 1 Median= 20.2 15

10

5

0 •

*Early years are estimated from mid-month measurements including 1919-1937 for February 1 and 1919-1929 for April 1.

Idaho SNOTEL Current Snow Water Equivalent (SWE) O/o of Normal

USDA

'°" NRCS

Northern Panhandle

Region

mD

The snonw ate-r eqLivalent percent of nonnal rep-esen-.s die current S l"IOH water equivalent k>und at selected SNOTEL sites in or near lhe basin oornpared to ::he a'\l'e!lage value for those sites on this day. Data based on the first reacing of the day (typically 00:00).

Mar 13, 2014 Current Snow Wate r Equivale nt (SWE} Basin-wide Perce nt o f 1981-2 010 Median

c::::::::J unavailable• -

Idaho SNOTEL W ater Year ( Oct 1 ) to Date Prec ipitati on O/o of Normal

N orthern Panhandl e

Region

w Owyh ee

USDA

'°' NRCS ihe water year to d a:e ~tat.ion percent of normal represents lhe aocumula:ed precipiblion found m selected SNOTEL SC'.es in or near the basin compared to the average v a lue for those sites on this day. Data. based on 1he &st reading of the day {typically 00:00).

Mar 13, 2014 Water Year (O ct 1 ) to Dat e Precip itatio n Basin-wide Percent o f 1981 -2 0 10 A v er age

~ un availabl e •

- < 50%

~ 50 - 69%

~ 70 - 89%

~ 90 - 109%

~ 110 - 12 9%

- 130 - 14 9%

- > = 150% oa.-a, a.nava.ua.Oole a c r.m e ot p ~ Cf' m-eas.urem ent .ts n ot repre sentattw: a.t t'lllS r.'me otyear

P rov is i onal Data S u bjf:K:t to Rev i sio n

-=-==-===---ic::==--• M iles 0 10 20 40 60 eo 100

Bear River

nake

Prepared by the- USOA/1'11RCS National Water and C l.....-..afe Center-Port.Jand. Oregon hnp:/Jwww.wcc..nrcs.usda.gov}ig•isJ Based on data from hUp::JJwww. wcc:.nrcs..usda..govJ'reportS/ Scie nce- oc.w,_::a,ct: Jim _Mam:[email protected] 503 4 14 3047

USDA ~

NRCS Idaho Streamflow Forecasts March 1 2014

United Stat-. Department ot Agriculture

Pervent of Average - < 25 - 25 - 49 50 - 69 70 - 89 - 90 - 109 110 - 129 - 130-149 - 150 - 180 - > 180

0 20 40 80 120 --

Values shown are based on the 50°/o chance of exceedance forecasts. Forecast period varies for some basins. Please refer to the Water S u ppl y Outlook Report for more details regarding these forecasts. http ://www. n res. usda. gov/ wps/ portal/n rcs/ mai n / id/ snow/

160 Miles

N

A

IDAHO SURFACE WATER SUPPLY INDEX (SWSI) March 1, 2014Agricultural Water

Most Recent Year Supply Shortage May

SWSI With Similar SWSI Occur When SWSI is

BASIN or REGION Value Value Less Than

Northern Panhandle -0.4 2000/2007 NA Spokane -0.1 2006 NA

Clearwater 2.1 2009/2012 NA Salmon 0.1 2010 NA Weiser -2.1 2004/2013 NA Payette -1.8 2002/2005 NA

Boise -1.1 2002/2003 -1.5 Big Wood -1.8 2002/2003 0.0

Little Wood -2.8 2002/2013 -1.7 Big Lost -1.6 2000/2007 0.5

Little Lost -1.3 2000/2008 1.2 Teton 0.9 2006/2009 -3.9

Henrys Fork -0.1 2000/2012 -3.4 Snake (Heise) 1.1 2006/2012 -1.5

Oakley -2.3 2002/2004 -0.2 Salmon Falls -3.3 2003 -1.0

Bruneau -2.6 2007/2013 NA Owyhee -3.8 1992/2003 -3.4

Bear River 0.4 2001/2013 -2.7

SWSI SCAL~ PERCENT CHANCE OF EXCEEDANCE, AND INTERPRETATION

- 4 - 3 - 2 - 1 0 1 2 3 4 1------ 1------ 1------ J------1------ 1------1------ 1------ 1

99%

I Much I Below

87%

I Be l ow I Normal

75% 6 3% 50%

Near Nor mal Water Su ppl y

37% 25%

Abov e Normal

13%

Mu c h Above

1%

SNOTEL Site SQUAW FLAT – Weiser - Payette Divide8” of precipitation since March 1

Station (782) WATERYEAR=2014 (DaiJy) NRCS National Wat,er and Climate Center- ProvisionaJ Data - subject to r,evision Thu Mar .13 13:58:23 PDT 2014

45.0 42 .5

40.0

37.5

35.0

32.5

30.0

27.5 IJ'1 QJ

25.0 ..c 22.5 u .£

20.0 17.5

15.0 12.5

10.0

7.5 5.0

2.5 0.0

r-1 .--I .--I .--I .--I r-1 r-1 a a a a 0 0 a B ~

I I I L u C ..c QJ ro QJ ro 0 z 0 ~ Ll. 2

L

~

.--I r-1 r-1 0 0 0

~ I I

C ::::, ::::, ~ ~

~

.--I a

I

C'I

c1

.--I a

I

c.. QJ IJl

.--I a B 0

PREC 81-10 Average (in} - PREC WY 2014 (in)

- SWE 81-10 Median (in )

- SWE WY 2014 (in)

s

Payette Basin 2014 Precipitation Comparison Graph (11 sites) Bused ur, Pruvisiunu! SNOTEL clutu us uf Mur 11, 2014

- - Average --WY2002 --WY2008 --WY2013 -WY2014

0 ~ii.ii,~:..._-----!~~..!.-~ ---l-~ ---!...~~).._~ -l-~ ---!-~ --l~~...!-~ ---l-~----l l·Oct l·Nov l·Dec l ·Jan l·Feb 1-Mar l·Apr l·May 1-Jun l·Jul l·Aug 1-Sep

Camas Creek near Blaine, on average, peaks1 day before Soldier R.S. swe reaches half melt,

6.8” peak SWE3.4” half melt

Station (769) WATERYEAR=2014 (Daily) NRCS National Water and Climate Center - Provisional Data - subject to revision Thu Mar.13 13:21:54 PDT2014

V'I QJ

..c u

,!;

22.5

2 0.0

17.5

15.0

12.5

1 0.0

7.5

5.0

2.5

0.0

.-i 0

-8 0

Har 07

2014

.-I 0

~ z

Har 08

2014

.-i .-i .-i .-I 0 0 0 0 u C: .n .:_ QJ .!!!., QJ ro 0 LL :a

USGS :1.3:1.4:1.500 CANAS CREEK HR BLRI.NE ID

Har 09

20:1.4

Har 10

20:1.4

Har 11

2014

Har 12

20:1.4

.-I 0 .:_

~

Har 13

2014

---- Provi.si.o na1 Da ta S ubje ct to Re vis i o n----

6 Hedi.an dai._l_,y stati.sti.c ( 43 ~ears ) ::!IE Heas ured discharge - Discharg e

.-I 0

~ :a

Har 14

20:1.4

600

550

500

450

Cl) 400 u.. u 350 ~

300 co 0 C 250 co Cl)

2 200

150

100

50

PREC 81-10 Average (in)

- PREC WY 2014 ( in)

- SWE 81-10 Median (in) - SWE WY 2014 (in)

' ' ' l

... I :\ ; ! '·' / r~

! !J ! I

10-25-75-90

= Estimated

-+---+--\---+-1 - SimilarYr

--+--4--+-1 --Last Yr >-t---1,-t-l - Projected

--current

'r--1----+'rl ------- Median

(D C") 0 .... c: """" C'\I N :, C: C: C: -, ::::, ::::, :::, -, -, -,

--Max-Min

Updated

13-Mar-14

Similar Year

1990

CL Q,.I

~ ....0 CL _1\.1

0.. Q,.I

~ ....c 0.. Q..I

Snow Indexes with March 14 SWE Data compared to April 1 Indexes:

Hoback 12th highest compared to April 1 index that starts in 1961Greys 14th highest compared to April 1 index that starts in 1961Gros Venture 16th highest compared to April 1 index that starts in 1961

Snake Basin above Jackson Lake 2014 Snow Water with Non-Exceedence Projections (5 sites)

Based on Provisional SNOTEL data as of Mar 11, 2014

-Normal - WY2014 - Minimum - 10% 30% - 5006 70% - 90% - Maximum Snake Basin above Palisades 2014 Snow Water with Non-Exceedence Projections (18 45

40

iii QI 35 .r: u C: :.

30 ... C: QI "'iii

25 .2 ::, er w

20 .. QI

1v $ 15 g C: 10 V>

0 ..)mll!!!::=_illliilllli!..... _______________ ~ --i .;ai,IL\...-l---i--~ ~

1-0ct 1-Nov 1-Dec 1-Jan 1-Feb 1-Mar 1-Apr 1-May 1-Jun 1-Jul 1-Aug 1-Sep

Based on Provisional SNOTEL data as of Mar 11, 2014

-Normal - WY2014 - Minimum - 10% 30%- 50% 70% 90%- Maximum

40

35 -IJI j30 u C

.:::.25 .. C GI

]20 ·s ~15 .. GI .. ~10

~ 5 C Ill

0 1-0ct 1-Nov 1-Dec 1-Jan 1-Febl-Mar 1-Apr 1-May 1-Jun 1-Jul 1-Aug 1-Sep

8000 -'tJ .f 7000

' ~ 6000 ~ 0 . o 5000 0

'"" ; ,400) -a. a. 3000 :::J . v.,

ii 200) ... ~ 1000

0

Mar 1 Hist,ori1c, ,an·d Fore,casted Surf,a1ce W,aterSupply

Snake River Ne,a r Heise -

------- I- --_..__ - I- - I- .... -

11 ------ - .... - - -- -- ---~ - - I- I- I- - I- - - - - I- I- --- -- - - .... .... .... - - - - .... .... - - - - .... .... - - - -

I

- - - .... ..... ..... - - - - ..... ..... - - - - ..... ..... - - - -I

11 : I I: I I I I I I I I I I I I I I I I I I I I I

Ye,ars

-

-- -- ------- I- I- I-

- -.... .... .... - - - .... .... ....

..... ..... ..... - - - ..... ..... .....

: ..... ..... .....

I I I I I I I I I I I

'" -

-

-

-

I

DStream F!ow Apr-Sep

• Reservoir 28-Feh

, ,. i i i ,.

7 J ;_; " ~-,-~ ~ ~

i i ~ ~ I _ "" _ I; ._ ~ ~ - ~ i; ~ i 1 1 ~ ~ i i i

- _ i; .... ~ .... i - i _i I; ~ i i i ~ ~ i i i ~ ~ ~ i i ~ ~ - II' II' -, -I; ~ i i i ~ ~ i i i i; _ i i i ..... ,-1-,

I I I I I I

I I I I I

I

Adeqllate Irrigation

Supply Above 4,400 KAF

Snake River Near Heise SWSI

# of

Station ID Station Nan1e Period Data Type Years Years

13037500 Snake River near Heise Apr-Se p strm 1981-2013 33 Units KAF 13010500 Jackson Lake 28-Feb resv 1981-2013 33 Units KAF 13032450 Palisades Reservoir 28-Feb resv 1981-2013 33 Units KAF

ENSO Classification SE Strong El Nino - EN Mild El Nino - N Neutral - lN Mild La Nina - SL Strong la Nina

Streamflov, + Non-Strean1 Flow Reservoir Reservoir Exc:eedance

Rank Year Enso Apr-Se p 28-Feb Sum Probability SWSI

Ill ~ [ZOO~ ~ ~ am M ~ ~ ~ 634 i!ill1 tlill g.W,/ [JI

i!m 558 86 ~ §ffl ~ ~ w IZID! m ~

5 1982 N 5772 1405 7177 85% 2.9

6 1983 SE 5008 1772 6780 82% 2.7 7 1984 N 5046 1687 6733 79% 2.5 8 1999 SL 4947 1662 6609 76% 2.2 9 1998 SE 4495 1853 6348 74% 2.0

10 2009 N 4610 1649 6259 71% 2014 10% Chance Exceedance Forcast N 5190 760 5950 70%

482 60 58 69% 11 SE 4442 918 5360 68% 1.5

12 2006 N 4076 1267 5343 65% 1.2 2014 50% Chance Exceedance Forcast N 4570 760 5330 63% 1.1

13 2012 LN 1863 62% 1.0 14

15 2000 N 3057 1900 4957 56% 0.5

16 2010 EN 3106 1803 4909 53% 0.2 17 1985 N 3490 1363 4853 50% 0.0

18 1981 N 2912 1876 4788 47% -0.2 19 1993 EN 4113 663 4776 44% -0.5

2014 90Yo Chance Exceedance Forcast N 3950 760 4710 43% -0.6 20 1989 SL 3866 761 4627 41% -0.7

21 1990 N 2806 1681 4487 38% -1.0

22 1991 N 3354 1054 4408 35% -1.2

n 1Q

8000 -'tJ .f 7000

' ~ 6000 ~ 0 . o 5000 0

'"" ; ,400) -a. a. 3000 :::J . v.,

ii 200) ... ~ 1000

0

Mar 1 Hist,ori1c, ,an·d Fore,casted Surf,a1ce W,aterSupply

Snake River Ne,a r Heise -

------ I--

_..__ - I- - I- .... -11 -

----- - .... - - -- -- ---~ - - I- I- I- - I- - - - - I- I- --- -- - - .... .... .... - - - - .... .... - - - - .... .... - - - -

I

- - - .... ..... ..... - - - - ..... ..... - - - - ..... ..... - - - -I

11 : I I: I I I I I I I I I I I I I I I I I I I I I

Ye,ars

-

-- -- ------- I- I- I-

- -.... .... .... - - - .... .... ....

..... ..... ..... - - - ..... ..... .....

: ..... ..... .....

I I I I I I I I I I I

'" -

-

-

-

I

DStream F!ow Apr-Sep

• Reservoir 28-Feh

, ,. i i i ,.

7 J ;_; " ~-,-~ ~ ~

i i ~ ~ I _ "" _ I; ._ ~ ~ - ~ i; ~ i 1 1 ~ ~ i i i

- _ i; .... ~ .... i - i _i I; ~ i i i ~ ~ i i i ~ ~ ~ i i ~ ~ - II' II' -, -I; ~ i i i ~ ~ i i i i; _ i i i ..... ,-1-,

I I I I I I

I I I I I

I

Adeqllate Irrigation

Supply Above 4,400 KAF

200% ~-----------------------------Forecasted Percent of Adequate Water Supply

180% Drier I 90% chance of exceedance

160% J_ I 70% chance of exceedance

140% t- I 50% chance of exceedance I 30% chance of exceedance

120% -I

110% chance of exceedance Wetter

100% Adequate Water Supply

80% --l---------1

60%

20%

0%

Owyhee Salmon Falls Big Wood Big Lost Little Lost Oakley Little Wood Boise Snake {Heise)

BASIN

Adequate Irrigation

Water Supply (KAF)

Projected March 31 Reservoir Storage

(KAF)

Streamflow Volume

Needed for Adequate

Water Supply (KAF)

(% of Ave.)

90% Chance of Exceedance

StreamflowForecast Apr-Sep

(KAF)



(KAF)



(KAF)



(KAF)



(KAF)

Salmon Falls 110 22 88 (103%) 9 (-79) 19 (-69) 28 (-60) 39 (-49) 58 (-30)

Big Wood 275 50 225 (85%) 0 (-225) 8 (-217) 20 (-205) 85 (-140) 170 (-55)

Oakley 50 23 27 (87%) 9 (-18) 13 (-14) 14 (-13) 20 (-7) 27 (0)

Big Lost 180 31 149 (99%) 27 (-122) 50 (-99) 75 (-74) 110 (-39) 165 (+16)

Little Lost 40 0 40 (85%) 13 (-27) 19 (-21) 23 (-17) 28 (-12) 36 (-4)

Owyhee 450 75 375 (50%) 85 (-290) 173 (-202) 250 (-125) 340 (-35) 505 (+130)

Boise 1500 545 955 (70%) 200 (-755) 540 (-415) 695 (-260) 850 (-105) 1190 (+235)

Little Wood 60 18 42 (45%) 8 (-34) 23 (-19) 36 (-6) 53 (+11) 83 (+41)

Snake (Heise) 4400 700 3700 (98%) 2270 (-1430) 2940 (-760) 3240 (-460) 3540 (-160) 4210 (+510)

Teton 85 0 85 (44%) 93 (+8) 120 (+35) 141 (+56) 163 (+78) 199 (+114)

Bear River 400 680 0 2 (+282) 10 (+290) 62 (+342) 125 (+405) 217 (+497)

Water Supply Outlook Key: ShortagesSome

ShortagesMarginalSupplies

SufficientSupplies Surplus

February 1, 2014 Water Supply Forecasts, Amount Needed & Shortages Based on the 5 Exeedance Forecasts

Adequate Supply

ReservoirStorage =StreamflowNeeded

March 1, 2014 Water Supply- Amount Needed, Shortages & Surplus Based on All Five Chance of Exceedance Forecasts

Fore-cast

Period Used

BASIN or REGION

Adequate Irrigation

Water Supply (KAF)

Reservoir Storage

(KAF)

Streamflow Volume

Needed for Adequate

Water Supply KAF (%)

90% Chance of

Exceedance Streamflow

Forecast (KAF)

70% Chance of


Forecast (KAF)

50% Chance of


Forecast (KAF)

30% Chance of Exceedance Streamflow

Forecast (KAF)

10% Chance of


Forecast (KAF)

Mar-Sep Owyhee 450 127 Feb28 323 (55%) 49 (-274) 99 (-224) 144 (-179) 197 (-126) 290 (-33)Mar-Sep Salmon Falls 110 20 Feb28 90 (106%) 16 (-75) 26 (-64) 34 (-56) 44 (-46) 60 (-30)

Apr-SepBig Wood 275

60 Mar1370 Mar31 205 (77%) 32 (-173) 82 (-123) 103 (-102) 155 (-50) 230 (+25)

Apr-SepBig Lost 180

30 Mar1035 Mar31 145 (97%) 26 (-119) 55 (-90) 86 (-59) 117 (-28) 162 (+17)

Apr-Sep Little Lost 40 N/A 40 (118%) 15 (-25) 22 (-18) 27 (-13) 33 (-7) 42 (+2)Mar-Sep Oakley 50 18.3 Feb28 31 (100%) 16 (-15) 26 (-5) 34 (+3) 44 (+13) 60 (+29)Mar-Sep Little Wood 60 15 Feb28 42 (46%) 14 (-28) 27 (-15) 39 (-3) 53 (+11) 77 (+35)

Apr-Sep

Boise 1500522 Feb28588 Mar13640 Mar31 860 (63%) 675 (-185) 960 (+100) 1090 (+230) 1220 (+360) 1500 (+640)

Apr-Sep

Snake (Heise) 4400760 Feb28588 Mar13860 Mar31 3540 (98%) 3950 (+410) 4320 (+780) 4570 (+1030) 4820 (+1280) 5190 (+1650)

Apr-Sep Teton 85 N/A 85 (44%) 166 (+81) 200 (+115) 225 (+140) 250 (+165) 295 (+210)

Apr-Sep Bear River 500 700 Mar31 minimal 4 (+184) 61 (+241) 115 (+295) 169 (+349) 248 (+428)

Water Supply Outlook Key: Shortages Some Shortages Marginal Supplies Sufficient Supplies Surplus

March 1, 2014 Water Supply- Amount Needed, Shortages & Surplus Based on All Five Chance of Exceedance Forecasts

Fore-cast

Period Used

BASIN or REGION

Adequate Irrigation

Water Supply (KAF)

Reservoir Storage

(KAF)

Streamflow Volume

Needed for Adequate

Water Supply KAF (%)

90% Chance of


Forecast (KAF)

70% Chance of


Forecast (KAF)

50% Chance of


Forecast (KAF)

30% Chance of Exceedance Streamflow

Forecast (KAF)

10% Chance of


Forecast (KAF)

Mar-Sep Owyhee 450 127 Feb28 323 (55%) 49 (-274) 99 (-224) 144 (-179) 197 (-126) 290 (-33)Mar-Sep Salmon Falls 110 20 Feb28 90 (106%) 16 (-75) 26 (-64) 34 (-56) 44 (-46) 60 (-30)

Apr-SepBig Wood 275

60 Mar1370 Mar31 205 (77%) 32 (-173) 82 (-123) 103 (-102) 155 (-50) 230 (+25)

Apr-SepBig Lost 180

30 Mar1035 Mar31 145 (97%) 26 (-119) 55 (-90) 86 (-59) 117 (-28) 162 (+17)

Apr-Sep Little Lost 40 N/A 40 (118%) 15 (-25) 22 (-18) 27 (-13) 33 (-7) 42 (+2)Mar-Sep Oakley 50 18.3 Feb28 31 (100%) 16 (-15) 26 (-5) 34 (+3) 44 (+13) 60 (+29)Mar-Sep Little Wood 60 15 Feb28 42 (46%) 14 (-28) 27 (-15) 39 (-3) 53 (+11) 77 (+35)

Apr-Sep

Boise 1500522 Feb28588 Mar13640 Mar31 860 (63%) 675 (-185) 960 (+100) 1090 (+230) 1220 (+360) 1500 (+640)

Apr-Sep

Snake (Heise) 4400760 Feb28588 Mar13860 Mar31 3540 (98%) 3950 (+410) 4320 (+780) 4570 (+1030) 4820 (+1280) 5190 (+1650)

Apr-Sep Teton 85 N/A 85 (44%) 166 (+81) 200 (+115) 225 (+140) 250 (+165) 295 (+210)

Apr-SepBear River 500

700 Mar3135 Mar31

minimal4 (+184) 61 (+241) 115 (+295) 169 (+349) 248 (+428)

Water Supply Outlook Key: Shortages Some Shortages Marginal Supplies Sufficient Supplies Surplus

Slide Number 1Slide Number 2Slide Number 3Slide Number 4Slide Number 5Slide Number 6Slide Number 7Slide Number 8Slide Number 9Slide Number 10Slide Number 11Slide Number 12Slide Number 13Slide Number 14Slide Number 15Slide Number 16Slide Number 17Slide Number 18Slide Number 19Slide Number 20Slide Number 21Slide Number 22Slide Number 23Slide Number 24Slide Number 25Slide Number 26Slide Number 27

march 1, 2014 - idaho · 2014. 3. 14. · 70 february 1 & march 1 snow water content compared to...

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