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Lake Mead
Lake Powell
89%
61%
93%
71%
78%
52%, 12.62 MAF
42%, 10.86MAF
1,220’
3,700’
Current Elevation 3,609’
Colorado River Water Supply ReportSystem Contents: 29.05 MAF12/29/19
Current Elevation 1,090’
Mid-Elevation Release 3,575’
Tier 0 DCP 1,090’
Reservoir Current Change MaximumLake Mead 10.86 0.55 25.90Lake Powell 12.62 - 0.27 24.30Flaming Gorge Reservoir 3.33 - 0.06 3.75Navajo Reservoir 1.33 - 0.02 1.70Blue Mesa Reservoir 0.59 - 0.06 0.83Fontenelle Reservoir 0.21 - 0.03 0.34Morrow Point Reservoir 0.11 0.00 0.12
Reservoir Capacities (MAF)
As of 12/29/2019, snow accumulation in the Green River Basin (contributes ~33%) is at 6.9 in. (blue line), which is 114% of the 30-year median for this date of 6.0 in. (purple line) and is greater than last year’s amount (green line).
Snow accumulation in the Upper Colorado River Basin (contributes ~42%) to date is at 7.1 in., which is 118% of the 30-year median for this date of 6.0 in.
Snow accumulation in the San Juan River Basin (contributes ~13%) to date is at 10.9 in., which is 126% of the 30-year median for this date of 8.6 in.
For the overall Colorado River Basin above Lake Powell, the snow accumulation to date is at 7.3 in., which is 116% of the 30-year median for this date of 6.3 in.
Colorado River Basin Weather ModificationBasin-wide Weather Modification Agreement• Multi-party
Utah Division of Water Resources Six-Agency Committee of CaliforniaWyoming Water Development Office Southern Nevada Water AuthorityColorado Water Conservation Board Central Arizona Water Conservation DistrictNew Mexico Interstate Stream Commission
• Executed in 2018; effective through 2026• Included in Upper Basin DCP
Annual Process TimelineJune: Technical committee reviews annual exhibit of proposed activities
August: Activity exhibits are finalized and approved by technical committee
September: Final activity exhibits are executed
November: Weather modification activities begin
March/April: Weather modification activities end
Water Year 2020 Weather Modification Activities
Winter 2019-2020 Weather Modification programs:• Colorado
• Colorado Water Conservation Board
• Utah • Utah Division of Water Resources
• Wyoming • Wyoming Water Development Office
Description of Activities:• Extension of existing operations• Equipment placement and/or replacement (generators, icing meters)
• Optimization studies
Utah Weather Modification Activities (WY2020)
• Extension of High Uintas and Central/Southern Utah programs
• Operation and maintenance of icing rate meters
• Feasibility study to optimize cloud seeding in the High Uinta program
• High resolution weather forecast modeling (to guide seeding)
• Improve generator location placement in High Uintas
• Analysis and calibration of microwave radiometer data (to identify ideal seeding storm patterns, seedable clouds, and icing events)
High Uintas
Central/Southern Utah
Tributaries to Lake Powell
Tributaries to Lake Mead
Colorado Weather Modification Activities (WY2020)
• Extension of existing operations• Central Mountains River Basin• Grand Mesa• Gunnison River Basin• Telluride/Western Dolores• Western/Eastern San Juan Mountains
• Program equipment upgrades• Remote generators• Weather stations• Icing rate sensors• Radiometers
• Evaluation studies• Analysis of seeding condition trends from
radiometer data
Central Mountains
Gunnison
Grand Mesa
San Juan (West/East)
Telluride/San Miguel
Wyoming Weather Modification Activities (WY2020)
• Extension of existing operations in the Wind River Range• 10 remote generators (includes seeding material and meteorological forecasting)
Wind River Range
Predominant storm path direction
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Flaming Gorge Flaming Gorge ReservoirReservoir
Lake MeadLake Mead
Lake PowellLake Powell
Great Great Salt LakeSalt Lake
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UTAHUTAHNEVADANEVADA
COLORADOCOLORADO
WYOMINGWYOMINGIDAHOIDAHO
ARIZONAARIZONANEW MEXICONEW MEXICOCALIFORNIACALIFORNIA
OREGONOREGONNEBRASKANEBRASKA
SOUTH DAKOTASOUTH DAKOTA
TEXASTEXAS
OAKLAHOMAOAKLAHOMA
Green RiverGreen River
Rio
Gra
nd
e
Rio
Gra
nd
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Yampa River
Yampa River
Virgin
Riv
er
Virgin
Riv
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Arkansas River
Arkansas River
Big Sandy CreekBig Sandy Creek
Price River
Price River
San Juan RiverSan Juan River
Ha
ms Fo
rkH
am
s Fork
Pa
ria R
iver
Pa
ria R
iver
Bla
cks
Fork
Bla
cks
Fork
Duchesne River
Duchesne River
Salt R
iverSa
lt River
Do
lores R
iver
Do
lores R
iver
Uinta River
Uinta River
Fremont RiverFremont River
Escalante RiverEscalante River
San Rafael River
San Rafael River
Dirty D
evil River
Dirty D
evil River
Ash
ley Creek
Ash
ley Creek
Lake Fork River
Lake Fork River
Little Brush Creek
Little Brush Creek
Little Snake RiverLittle Snake River
Arkansas RiverArkansas River
Strawberry River
Strawberry River
Rio
Gra
nd
e
Rio
Gra
nd
e
Co
lora
do
Rive
rC
olo
rad
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iver
San
Ju
an
Riv
er
San
Ju
an
Riv
er
Rio GrandeRio Grande
Nye CountyNye County
Elko CountyElko County
Inyo CountyInyo County
Coconino CountyCoconino County
Lincoln CountyLincoln County
Harney CountyHarney County
Clark CountyClark County
Fremont CountyFremont County
Humboldt CountyHumboldt County
Sweetwater CountySweetwater County
Carbon CountyCarbon County
Malheur CountyMalheur County
Mohave CountyMohave County
Tooele CountyTooele County
Owyhee CountyOwyhee County
Whi te Pine CountyWhi te Pine County
Mil lard CountyMil lard County
San Juan CountySan Juan County
Apache CountyApache County
Box Elder CountyBox Elder County
Lander CountyLander County
Pershing CountyPershing County
Navajo CountyNavajo County
Natrona CountyNatrona County
Moffat CountyMoffat County
Rio Ar riba CountyRio Ar riba County
Garf ie ld CountyGarf ie ld County
Weld CountyWeld County
Tulare CountyTulare County
Kane CountyKane County
Emery CountyEmery County
Uintah CountyUintah County
Sublet te CountySublet te County
Albany CountyAlbany County
McKinley CountyMcKinley County
Churchil l CountyChurchil l County
Union CountyUnion County
Iron CountyIron County
Eureka CountyEureka County
Colfax CountyColfax County
Juab CountyJuab County
Grand CountyGrand County
Mesa CountyMesa County
San Miguel CountySan Miguel County
Las Animas CountyLas Animas County
Mineral CountyMineral County
Converse CountyConverse County
Sandoval CountySandoval County
Mono CountyMono County
Elmore CountyElmore County
Esmeralda CountyEsmeralda County
Gunnison CountyGunnison County
Kern CountyKern County
Quay CountyQuay County
Blaine CountyBlaine County
Duchesne CountyDuchesne County
Park CountyPark County
Taos CountyTaos County
Saguache CountySaguache County
Routt CountyRoutt County
Cassia CountyCassia County
Larimer CountyLarimer County
Fresno CountyFresno County
Beaver CountyBeaver County
Rio Blanco CountyRio Blanco CountyUtah CountyUtah County
Laramie CountyLaramie County
Wayne CountyWayne County
Pueblo CountyPueblo County
Uinta CountyUinta County
Plat te CountyPlat te County
Lyon CountyLyon County
Mora CountyMora County
Goshen CountyGoshen County
Yuma CountyYuma County
El Paso CountyEl Paso County
Harding CountyHarding County
Elber t CountyElber t County
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Teton CountyTeton CountyButte CountyButte County
Sev ier CountySev ier County
Washington CountyWashington County
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Niobrara CountyNiobrara County
Bent CountyBent County
Bingham CountyBingham County
Eagle CountyEagle County
San Bernardino CountySan Bernardino County
Summit CountySummit County
Santa Fe CountySanta Fe County
Caribou CountyCaribou County
Twin Falls CountyTwin Falls County
Montezuma CountyMontezuma County La Plata CountyLa Plata County
Bonnevil le CountyBonnevil le County
Jackson CountyJackson County
Power CountyPower County
Sanpete CountySanpete County
Guadalupe CountyGuadalupe County
Otero CountyOtero County
Huerfano CountyHuerfano County
Ada CountyAda County
Delta CountyDelta County
Adams CountyAdams County
Rich CountyRich County
Kit Carson CountyKit Carson County
Morgan CountyMorgan County
Kiowa CountyKiowa County
Cache CountyCache County
Cost i l la CountyCost i l la County
Conejos CountyConejos County
Oneida CountyOneida County
Archuleta CountyArchuleta County
Cibola CountyCibola County
Wasatch CountyWasatch County
Camas CountyCamas County
Pitk in CountyPitk in County
Bannock CountyBannock County
Dolores CountyDolores County
Boise CountyBoise County
Hinsdale CountyHinsdale County
Chaffee CountyChaffee County
Cheyenne CountyCheyenne County
Custer CountyCuster County
Baca CountyBaca County
Piute CountyPiute County
Bear Lake CountyBear Lake County
Douglas CountyDouglas County
Crowley CountyCrowley County
Boulder CountyBoulder County
Rio Grande CountyRio Grande County
Hot Spr ings CountyHot Spr ings County
Davis CountyDavis County
Jefferson CountyJefferson County
Arapahoe CountyArapahoe County
Daggett CountyDaggett County
Salt Lake CountySalt Lake County
Weber CountyWeber County
Gooding CountyGooding County
Alamosa CountyAlamosa County
Phil l ips CountyPhil l ips County
Teller CountyTeller County
Bernali l lo CountyBernali l lo County
Franklin CountyFranklin County
Ouray CountyOuray County
Canyon CountyCanyon County
Jerome CountyJerome County
Madera CountyMadera County
Sedgwick CountySedgwick County
Madison CountyMadison County
Torrance CountyTorrance County
Gem CountyGem CountyWashakie CountyWashakie County
Washoe CountyWashoe County
Lake CountyLake County
Minidoka CountyMinidoka County
Clear Creek CountyClear Creek County
Tuolumne CountyTuolumne County
Prowers CountyProwers County
Curry CountyCurry County
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Gilp in CountyGilp in County
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Denver CountyDenver County
Grant CountyGrant County
Los A lamos CountyLos A lamos County
Mar iposa CountyMar iposa County
Debaca CountyDebaca County
Upper Colorado
River Basin
Cloud SeedingGenerator Locations
andTarget Areas
Legend#* Seeding Generator Locations
Rivers & StreamsMajor RiversSecondary RiversTertiary RiversWeather Modification Target AreasWater BodiesUpper Colorado River BasinLower Colorado River BasinState BoundariesCounty Boundaries
Data was digitized and interpolated from the following:Colorado River Basin Weather Modification / State of WyomingActivity Exhibit - 2018/19 Season -Wyoming Water DevelopmentOffice (WWDO) Utah Cloud Seeding Proposal 2018-2019 Utah Dept. Natural ResourcesColorado Cloud Seeding Proposal Water Year 2019 - ColoradoWater Conservation Board - Dept. Natural Resources.
30795_R2129_Weather_Mod_Sites RH 6/19/2018
G u lfo f
C a l i f ornia
Upper Colorado
River Basin
Lower Colorado
River Basin
UTNV
AZ
ID WY
NM
CO
TXMX
MT
CA
PA C I FIC O C E AN
OR
80 20 40 60 80 10010
Miles
Main Map Area of Detail
0 50 100 150 200Miles
³
CCoo
ll oo
rr aa dd ooRR ii vv ee rr
The data, symbology and representations depicted in this map are presented for reference only. No assumed quality of accuracy are determined and or implied. Map is subjected to revision and updateas is needed
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