Thursday, October 31, 2013

Weekly Video Briefing- Cold and and Snow again by Sunday

 Snow will end in Star Valley by Friday morning with Saturday the only fair day prior to the next and even colder system that arrives on Sunday.


Riverton Forecast Office Weekly Video Briefing

Wednesday, October 30, 2013

Final Snow Totals for October 28-29




Riverton Forecast Office has issued a Final Summary on the Storm of Oct 28-29 2013





Wednesday afternoon at Star Valley Ranch



Wednesday Morning in Alta Wy




*




A complex early season winter storm brought a variety of weather to the Cowboy State on Monday, October 28th.  The Wind River Basin and west and southwest Wyoming were most impacted by this storm.  Before sunrise Monday rain broke out across the Wind River Basin, but quickly turned to snow by the morning commute. Moderate to heavy snow occurred through the morning hours.  By early afternoon much of the Wind River Basin had received 3 to 6 inches of snow with isolated higher amounts.  The focus shifted to southwest Wyoming Monday afternoon as a strong line of thunderstorms along a cold front pushed east out of southeast Idaho and northeast Utah.  Some damage even occurred in Kemmerer from strong thunderstorm winds.  Temperatures cooled behind the cold front with rain changing to snow across much of southwest Wyoming during the early evening hours.  Some persistent heavy snow showers set up in a north to south orientation generally from Jackson to Kemmerer from the middle of the evening through shortly after midnight.  Around 8 inches fell in Jackson while around 4 to 5 inches fell around Kemmerer.  Fog and freezing drizzle were also observed in some areas east of the Divide Monday night.  All of this activity resulted in slick road conditions with South Pass even being closed Monday night into Tuesday morning.

Below are a couple of maps showing snowfall across western and central Wyoming (left image) and a more detailed image across Jackson Hole (right image).  Click on them to enlarge them.
 Map of Snowfall Totals for Monday, October 28th.  Click to enlarge. Zoomed image of Snowfall totals across Teton County
Snowfall Totals thru 8AM Wed
CountyStation NameSnowfall
Big Horn1 E Greybull3
Big HornBone Springs Divide Snotel2
Big HornBasin2
Big HornOtto1.5
Big HornShell Creek Snotel1
Big HornBald Mountain Snotel1
CountyStation NameSnowfall
Fremont9.5 SW Lander8.5
FremontHobbs Park Snotel8
FremontRiverton ASOS7.2
FremontLander Airport7
Fremont6 SW Lander6.8
Fremont5 WSW Lander6.3
FremontDeer Park Snotel6
FremontCold Springs Snotel6
FremontBrooks Lake Lodge6
FremontSt. Lawrence Alt Snotel6
FremontSouth Pass Snotel6
Fremont1 W Lander5.5
FremontHudson5.5
Fremont10 NW Riverton4
FremontLander4
FremontLittle Warm Snotel3
FremontRed Canyon3
FremontLander3
FremontRiverton3
FremontDubois2
Fremont4 W Atlantic City1.8
FremontCastle Creek Snotel1
CountyStation NameSnowfall
Hot SpringsOwl Creek Snotel4
Hot Springs9 NE Thermopolis3.7
Hot SpringsLucerne3
Hot SpringsThermopolis2
Hot SpringsThermopolis2
Hot SpringsThermopolis1.7
Hot SpringsThermopolis1
CountyStation NameSnowfall
JohnsonBuffalo5.1
Johnson3 NNE Kaycee3.5
JohnsonCloud Peak Reservoir Snotel3
JohnsonSoldier Park Snotel3
JohnsonHansen Sawmill Snotel3
Johnson4 SSW Buffalo2.5
JohnsonBuffalo2.5
JohnsonLittle Goose Snotel2
JohnsonBear Trap Meadow Snotel2
CountyStation NameSnowfall
LincolnIndian Creek Snotel14
LincolnWillow Creek Snotel11
LincolnCottonwood Creek Snotel11
LincolnSpring Creek Divide Snotel11
LincolnSalt River Summit Snotel10
LincolnKelley Ranger Station Snotel10
LincolnHams Fork Snotel9
LincolnBlind Bull Summit Snotel8
LincolnBlind Bull Summit8
LincolnCommissary Ridge8
Lincoln5 NNE Thayne7
Lincoln5 SSE Smoot6
LincolnFossil Butte6
Lincoln2 SE Thayne5.3
Lincoln1 N Kemmerer5.1
Lincoln10 W Kemmerer5
Lincoln21 NNW Kemmerer5
LincolnTurnerville4.5
LincolnStar Valley Ranch4.5
LincolnKemmerer4.3
LincolnBox Y Ranch4
Lincoln3 SE Bedford4
LincolnAfton3.6
Lincoln1 SW Kemmerer3
LincolnAfton2
LincolnStar Valley Ranch1
LincolnAlpine1
Lincoln12 S Cokeville1
CountyStation NameSnowfall
NatronaCasper Mountain Snotel2
NatronaGrave Spring Snotel1
NatronaReno Hill Snotel1
NatronaPowder River School1
CountyStation NameSnowfall
ParkPahaska3
ParkKirwin Snotel2
ParkMarquette Snotel2
ParkTimber Creek Snotel2
Park3 NE Sunshine1.5
ParkMeeteetse1.2
Park5 ESE Cody1
ParkEvening Star Snotel1
ParkBlackwater Snotel1
Park4 ENE Powell0.8
Park1 WNW Cody0.5
CountyStation NameSnowfall
SubletteTriple Peak Snotel8
SubletteKendall Ranger Station Snotel5
SubletteSnider Basin Snotel5
SubletteElkhart Park G.S. Snotel5
SublettePocket Creek Snotel5
SubletteLoomis Park Snotel5
SubletteBig Sandy Opening Snotel5
SubletteNew Fork Lake Snotel4
Sublette8 N Daniel4
SubletteDaniel Fish Hatchery3
Sublette14 NW Pinedale2.6
SubletteGunsite Pass Snotel2
SubletteBoulder Rearing Station2
SubletteLarsen Creek Snotel2
SubletteBondurant1.6
SublettePinedale1.5
SubletteEast Rim Divide Snotel1
CountyStation NameSnowfall
SweetwaterBuckboard Marina6
SweetwaterGreen River4
SweetwaterGreen River3
SweetwaterFarson2
Sweetwater5 N Farson2
SweetwaterRock Springs1.5
SweetwaterWamsutter0.5
CountyStation NameSnowfall
TetonJackson Hole-Rendezvous Bowl11
TetonPhillips Bench Snotel11
TetonTeton Pass9
TetonJackson8.5
TetonJackson8.5
TetonJackson Hole-Mid8
Teton4 SSW Jackson7.5
Teton3 SSW Wilson7.5
TetonJackson7
Teton5 SE Rafter J Ranch7
TetonGrand Targhee Snotel7
Teton12 NE Jackson5
TetonTogwotee Pass Snotel5
TetonGrassy Lake Snotel4
TetonMoose4
TetonJackson Hole-Base4
TetonBase Camp Snotel3
TetonMoose3
TetonTogwotee Mountain Lodge3
Teton5 NW Jackson3
Teton1 NNW Alta3
Teton5 WNW Moran2.5
TetonSnake River Stn Snotel1
TetonGros Ventre Summit Snotel1
TetonGranite Creek Snotel1
CountyStation NameSnowfall
Washakie16 SSE Ten Sleep1.7
WashakieWinchester1.3
WashakiePowder River Pass Snotel1
WashakieMiddle Powder Snotel1
Washakie5 NNW Ten Sleep0.6
CountyStation NameSnowfall
YellowstoneSnake River Ranger Station5.5
YellowstoneLewis Lake Divide Snotel2
YellowstoneTwo Ocean Plateau Snotel1
YellowstoneParker Peak Snotel1
YellowstoneOld Faithful Ranger Station1
YellowstoneCanyon Snotel1
YellowstoneYellowstone East Entrance0.5

Tuesday, October 29, 2013

Wyoming Snow Summary for Oct 28-29


SNOWFALL REPORTS RECEIVED FROM OCTOBER 28-29 WINTER STORM THROUGH
8 PM TUESDAY EVENING...

LOCATION                             SNOWFALL

LINCOLN COUNTY...
 INDIAN CREEK SNOTEL...              14 INCHES.
 COTTONWOOD CREEK SNOTEL...          11 INCHES.
 WILLOW CREEK SNOTEL...              11 INCHES.
 SPRING CREEK DIVIDE SNOTEL...       11 INCHES.
 KELLEY RANGER STATION SNOTEL...     10 INCHES.
 SALT RIVER SUMMIT SNOTEL...         10 INCHES.
 HAMS FORK SNOTEL...                  9 INCHES.
 BLIND BULL SUMMIT...                 8 INCHES.
 COMMISSARY RIDGE...                  8 INCHES.
 10 W KEMMERER...                     5 INCHES.
 21 NNW KEMMERER...                  5 INCHES.
 TURNERVILLE...                     4.5 INCHES.
 STAR VALLEY RANCH...              4.5 INCHES.
 KEMMERER...                        4.3 INCHES.
 5 SSE SMOOT...                       4 INCHES.
 BOX Y RANCH...                       4 INCHES.
 2 SE THAYNE...                       3 INCHES.
 1 SW KEMMERER...                     3 INCHES.
 STAR VALLEY RANCH...                 3 INCHES.
 AFTON...                           2.4 INCHES.
 3 SE BEDFORD...                      2 INCHES.
 STAR VALLEY RANCH...                 1 INCH.
 ALPINE...                            1 INCH.
      


BIG HORN COUNTY...
 1 E GREYBULL...                      3 INCHES.
 BONE SPRINGS DIVIDE SNOTEL...        2 INCHES.
 BASIN...                             2 INCHES.
 OTTO...                            1.5 INCHES.
 SHELL CREEK SNOTEL...                1 INCH.
 BALD MOUNTAIN SNOTEL...              1 INCH.

FREMONT COUNTY...
 9.5 SW LANDER...                   8.5 INCHES.
 HOBBS PARK SNOTEL...                 8 INCHES.
 RIVERTON WEATHER OFFICE...         7.2 INCHES.
 LANDER AIRPORT...                  7.0 INCHES.
 6 SW LANDER...                     6.6 INCHES.
 5 WSW LANDER...                    6.3 INCHES.
 COLD SPRINGS SNOTEL...               6 INCHES.
 SOUTH PASS SNOTEL...                 6 INCHES.
 DEER PARK SNOTEL...                  6 INCHES.
 BROOKS LAKE LODGE...                 6 INCHES.
 ST. LAWRENCE ALT SNOTEL...           6 INCHES.
 1 W LANDER...                      5.5 INCHES.
 HUDSON...                          5.5 INCHES.
 10 NW RIVERTON...                    4 INCHES.
 RED CANYON...                        3 INCHES.
 LITTLE WARM SNOTEL...                3 INCHES.
 RIVERTON...                          3 INCHES.
 DUBOIS...                            2 INCHES.
 CASTLE CREEK SNOTEL...               1 INCH.

HOT SPRINGS COUNTY...
 OWL CREEK SNOTEL...                  4 INCHES.
 LUCERNE...                           3 INCHES.
 THERMOPOLIS...                       2 INCHES.

JOHNSON COUNTY...
 BUFFALO...                         5.1 INCHES.
 3 NNE KAYCEE...                    3.5 INCHES.
 CLOUD PEAK RESERVOIR SNOTEL...       3 INCHES.
 SOLDIER PARK SNOTEL...               3 INCHES.
 HANSEN SAWMILL SNOTEL...             3 INCHES.
 4 SSW BUFFALO...                   2.5 INCHES.
 LITTLE GOOSE SNOTEL...               2 INCHES.
 BEAR TRAP MEADOW SNOTEL...           2 INCHES.

               1 INCH.

NATRONA COUNTY...
 CASPER MOUNTAIN SNOTEL...            2 INCHES.
 GRAVE SPRING SNOTEL...               1 INCH.
 RENO HILL SNOTEL...                  1 INCH.
 POWDER RIVER SCHOOL...               1 INCH.

PARK COUNTY...
 3 NE SUNSHINE...                     2 INCHES.
 MARQUETTE SNOTEL...                  2 INCHES.
 KIRWIN SNOTEL...                     2 INCHES.
 TIMBER CREEK SNOTEL...               2 INCHES.
 PAHASKA...                           1 INCH.
 EVENING STAR SNOTEL...               1 INCH.
 BLACKWATER SNOTEL...                 1 INCH.

SUBLETTE COUNTY...
 TRIPLE PEAK SNOTEL...                8 INCHES.
 KENDALL RANGER STATION SNOTEL...     5 INCHES.
 LOOMIS PARK SNOTEL...                5 INCHES.
 SNIDER BASIN SNOTEL...               5 INCHES.
 ELKHART PARK G.S. SNOTEL...          5 INCHES.
 BIG SANDY OPENING SNOTEL...          5 INCHES.
 POCKET CREEK SNOTEL...               5 INCHES.
 8 N DANIEL...                        4 INCHES.
 NEW FORK LAKE SNOTEL...              4 INCHES.
 14 NW PINEDALE...                    2 INCHES.
 LARSEN CREEK SNOTEL...               2 INCHES.
 DANIEL FISH HATCHERY...              2 INCHES.
 GUNSITE PASS SNOTEL...               2 INCHES.
 EAST RIM DIVIDE SNOTEL...            1 INCH.

SWEETWATER COUNTY...
 GREEN RIVER...                       4 INCHES.
 FARSON...                            2 INCHES.
 5 N FARSON...                        1 INCH.

TETON COUNTY...
 PHILLIPS BENCH SNOTEL...            11 INCHES.
 JACKSON HOLE-RENDEZVOUS BOWL...     11 INCHES.
 TETON PASS...                        9 INCHES.
 JACKSON...                       7-8.5 INCHES.
 JACKSON HOLE-MID...                  8 INCHES.
 4 SSW JACKSON...                   7.5 INCHES.
 3 SSW WILSON...                    7.5 INCHES.
 GRAND TARGHEE SNOTEL...              7 INCHES.
 5 SE RAFTER J RANCH...               7 INCHES.
 TOGWOTEE PASS SNOTEL...              5 INCHES.
 12 NE JACKSON...                     4 INCHES.
 GRASSY LAKE SNOTEL...                4 INCHES.
 JACKSON HOLE-BASE...                 4 INCHES.
 MOOSE...                             3 INCHES.
 TOGWOTEE MOUNTAIN LODGE...           3 INCHES.
 BASE CAMP SNOTEL...                  3 INCHES.
 5 NW JACKSON...                      3 INCHES.
 GRANITE CREEK SNOTEL...              1 INCH.
 GROS VENTRE SUMMIT SNOTEL...         1 INCH.
 SNAKE RIVER STN SNOTEL...            1 INCH.

WASHAKIE COUNTY...
 16 SSE TEN SLEEP...                  2 INCHES.
 POWDER RIVER PASS SNOTEL...          1 INCH.
 MIDDLE POWDER SNOTEL...              1 INCH.

YELLOWSTONE NATIONAL PARK...
 LEWIS LAKE DIVIDE SNOTEL...          2 INCHES.
 SNAKE RIVER RANGER STATION...      1.5 INCHES.
 PARKER PEAK SNOTEL...                1 INCH.
 CANYON SNOTEL...                     1 INCH.
 TWO OCEAN PLATEAU SNOTEL...          1 INCH.
 OLD FAITHFUL RANGER STATION...       1 INCH.
 YELLOWSTONE EAST ENTRANCE...         1 INCH.

Thursday, October 24, 2013

Riverton Forecast Office Weekly Weather Briefing



Riverton WFO has issued their weekly weather video, discussing the rather wet period Wyoming has experienced the past 30 days and an interesting discussion on the upcoming storm.

Riverton WFO Video Weather Briefing

Wednesday, October 23, 2013

Major Weather Change on the Way for Wyoming

The wonderful fall weather that Star Valley and surrounding areas have been experiencing much of the month of October will be coming to an end by the first of next week.  The large upper high pressure ridge that has dominated much of the western states will be replaced by a cold upper low from Alaska.

The following is the graph of the maximum and minimum temperatures during October through Wednesday at Star Valley Ranch.



Star Valley Ranch  max/min for October 2013


Riverton Forecast Office has provided a heads up on the big changes.




Sunday, October 20, 2013

Star Valley Earthquake Potential

With the occurrence of the two weak earthquakes in the Star Valley area so far this year

http://starvalleywyweather.blogspot.com/2013/10/twin-earthquakes-jolt-star-valley.html

http://starvalleywyweather.blogspot.com/2013/05/earthquake-magnitude-lowered-to-36.html , it is a reminder that we live on, or very close, to an active fault.

While the chances of a major, damaging earthquake are low in any given year, nevertheless, it is just a matter of time before one does occur.

Following is a link to  a paper discussing the location of fault lines in Lincoln County WY and the potential of a major quake.

http://www.wrds.uwyo.edu/wrds/wsgs/hazards/quakes/seischar/Lincoln.pdf


The following was taken from this paper as it describes the fault systems of Star Valley in particular.

The Star Valley fault system is the third active fault system in Lincoln County. This fault system,
which has been subdivided into north and south segments, bounds the eastern edge of the Star
Valley. Investigations of the Star Valley fault system determined that Holocene and late-
Pleistocene offsets exist along the south fault segment (Piety et al., 1986; McCalpin et al., 1990;
McCalpin, 1990). Several maximum magnitude earthquakes have been suggested for the Star
Valley fault system. Piety and others (1986) proposed that the Star Valley fault system is capable
of generating a maxiumum credible earthquake of magnitude 7.5 with a recurrence interval of
5,000 to 7,000 years. Based upon a surface rupture length of 27 miles, McCalpin and others
(1990) determined that the Star Valley fault system could produce a maximum magnitude 7.2
earthquake. When McCalpin (1990) trenched a portion of the Star Valley fault near Afton, he
determined that a magnitude 7.3 earthquake with a recurrence interval of 2550-6000 years is
possible on this system. Approximately 5,500 years (radiocarbon age) has elapsed since the latest
event on the fault system at the Afton locality. Based upon this evidence, the Star Valley fault
system is near the maximum limit for the recurrence interval assigned to the system. Because of
the extensive seismic activity associated with the area surrounding the Star Valley fault, and
because of the close proximity of towns to this fault system, a maximum magnitude of 7.5 will be
used for this analysis. It should also be noted that it has been approximately 5500 years since the
last confirmed event on the Star Valley fault at Afton. This fault system is therefore nearing its
recurrence interval limit. A magnitude 7.5 earthquake could generate peak horizontal
accelerations of greater than 80%g at Afton, approximately 79%g at Alpine, approximately
6.6%g at Cokeville, approximately 3.2%g at Kemmerer and Diamondville, approximately 5.2%g
at La Barge, approximately 2.9%g at Opal, and approximately 47%g at Thayne (Campbell, 1987).
These accelerations are roughly equivalent to intensity IX earthquakes at Afton and Alpine, an
intensity VIII earthquake at Thayne, intensity V earthquakes at Cokeville and La Barge, and
intensity IV earthquakes at Kemmerer, Diamondville, and Opal. Afton and Alpine could sustain
heavy damage. Moderate to heavy damage could occur at Thayne. Light damage could occur at
Cokeville and La Barge, but Kemmerer, Diamondville, and Opal should sustain no damage.

The following map shows where the fault lines in this portion of Wyoming have been located.

Fault Line Locations 

Based on the the known threat for a major earthquake in the Star Valley area, it seems prudent to factor this into any future construction.  Additionally earthquake insurance might be considered.

Here is another link to a discussion of Wyoming Earthquake Hazards  including Star Valley

Wyoming Earthquakes

Saturday, October 19, 2013

Twin Earthquakes Jolt Star Valley

Friday night and early Saturday morning two earthquakes were recorded in the Star Valley area.  




Both were strong enough to be felt but likely caused little if any damage.

The first occurred at 6:05 pm MDT and was located just south of Teton Pass on the Wyoming/Idaho border.




The second hit right in Star Valley just to the south of Freedom, again on the Wyoming/Idaho border at 2:11 am MDT.


Thursday, October 17, 2013

Western Wyoming Weekly Weather Video Briefing

Riverton Forecast Office has issued this weeks video weather briefing.  Looks like an extended period of fine fall weather is in store for Star Valley and the surrounding mountain states.

Weekly Video Weather Briefing


Monday, October 7, 2013

2012-2013 Wyoming Water Year Summary





The official water year begins Oct 1.  Riverton Forecast Office
 has prepared a comprehensive  review of the water Year that
 just ended.   For comparison the CoCoRaHS site at Star Valley
Ranch received  24.18 inches of precipitation which included 
172.5 inches of snow. This amount exceeds any of the stations
reporting with Old Faithful being next  with 22.61 
and coincidently exactly the same amount of snow of 172.5 inches.























2012-13 Water Year Precipitation and Percent of Normal for Selected Stations

Station NameDrought
Conditions
Oct
2012
Nov
2012
Dec
2012
Jan
2013
Feb
2013
Mar
2013
Apr
2013
May
2013
Jun
2013
Jul
2013
Aug
2013
Sep
2013
Total for
Water Year
to Date
 click on locationD0D1
 for graphD2D3D4
Big Piney D2 0.240.150.040.070.090.030.251.26T0.89 0.41 0.83 4.26
1981-2010 Normals  0.53 0.21 0.30 0.31 0.35 0.44 0.53 0.840.79 0.71 0.69 0.786.48
Percent of Normal  4571 1323267 471500 125 59 10666
Buffalo  D1 0.770.750.080.480.130.080.831.610.950.11 0.23  3.349.36
1981-2010 Normals 0.93 0.54 0.40 0.42 0.35 0.92 1.30 2.53 2.28 1.66 0.81 1.3113.45
  Percent of Normal 83  13920 11437 9 64 64 42 28 25570
Casper  D10.560.490.390.270.500.852.541.810.871.66 0.70  1.4712.11
1981-2010 Normals 1.110.76 0.49 0.51 0.57 0.82 1.29 2.02 1.61 1.41 0.85 1.0812.52
  Percent of Normal 50 64 80 53 88104 1979054 118 82 13697
Snowfall 5.27.5 6.0 4.5 9.5 10.5  39.0 3.5 0.0  0.0 0.0 4.890.5
1981-2010 Normals7.4  10.311.0 9.1 9.8 10.9 11.6 2.9 0.1 0.0 0.0 1.8 74.9 
  Percent of Normal 70 73 55 49 97 96  336 121 0 0 0 267121
Evanston  D11.590.520.120.110.360.410.920.21T0.20 0.16  1.486.08
  1981-2010 Normals1.171.040.580.540.610.861.151.771.240.610.961.3111.84
  Percent of Normal 136 502120  59 4880 120 33 17 11351
Greybull  D10.060.210.130.280.140.090.381.010.400.32T 1.114.13
  1981-2010 Normals 0.60 0.30 0.28 0.23 0.18 0.40 0.71 1.65 1.20 0.66 0.42 0.887.51
  Percent of Normal 10 70 46 122 782354 61 33 480 12655
Lander  D00.680.490.400.701.280.423.141.980.050.280.01 3.7813.21
  1981-2010 Normals 1.29 0.86 0.58 0.41 0.58 1.16 1.87 2.20 1.27 0.780.61 1.0512.66
  Percent of Normal 5357 69 171221 36168 904 36 360104
Snowfall 5.64.8 5.312.7 23.8 5.1  43.3 10.50.0  0.0 0.0 4.1115.2 
1981-2010 Normals9.8  13.110.1 7.6 10.3 16.1 16.8 4.8 0.1 0.0 0.0 2.7 91.4 
  Percent of Normal 57 37 52 16723132  258 219 0 0 152126
Riverton  D00.340.320.410.110.540.111.301.380.050.540.03 3.018.14
  1981-2010 Normals 0.89 0.50 0.32 0.24 0.27 0.55 1.30 1.72 1.28 0.89 0.57 0.909.43
  Percent of Normal 3864 1284620020 100 80461 5 33486
Snowfall 1.11.4 4.8 2.7 8.8 1.1  15.9 2.40.0 0.0  0.07.3 45.5 
Rock Springs D20.070.170.200.050.320.190.370.56 0.210.50 1.374.01
 1981-2010 Normals 0.87 0.49 0.50 0.45 0.48 0.68 0.91 1.21 0.79 0.64 0.62 0.928.56
  Percent of Normal 835401167284146033 81 14947
Sheridan  D0 0.95 1.090.50 0.960.790.272.273.032.190.430.05 4.2616.79
  1981-2010 Normals 1.41 0.71 0.56 0.56 0.54 0.98 1.60 2.352.12 1.18 0.72 1.4314.16
  Percent of Normal 67 15489 17114628 142 12910336 7298119
Worland D10.260.600.260.130.260.200.981.120.090.300.13 2.636.96
  1981-2010 Normals0.690.350.23 0.230.190.460.861.421.150.710.430.857.57
  Percent of Normal 38171113  5713743 114 798 42 30 30992
Station NameDrought
Conditions
Oct
2012
Nov
2012
Dec
2012
Jan
2013
Feb
2013
Mar
2013
Apr
2013
May
2013
Jun
2013
Jul
2013
Aug
2013
Sep
2013
Total for
Water Year
to Date
Afton  D11.501.402.130.840.681.302.002.430.101.530.40 2.8117.12
  1981-2010 Normals1.632.041.251.401.091.401.542.261.971.431.251.4618.16
  Percent of Normal 92951706062 93130 1085107 32 19294
Snowfall 7.012.8 31.116.815.3 13.7  7.0 1.00.0 0.0  0.0 0.3105.0 
Bitter Creek 4NE D20.380.340.180.300.590.220.500.630.020.150.281.294.88
  1981-2010 Normals0.660.310.510.280.360.300.651.090.700.600.750.736.94
  Percent of Normal 5811035107 164 7377 58 325 37177 70
Cody D00.340.520.590.300.190.310.953.220.350.760.38 2.5410.45
  1981-2010 Normals0.890.480.330.330.330.561.061.821.681.110.911.0610.56
  Percent of Normal 3810817991585590177 2168 4224099
Snowfall0.03.06.04.03.01.07.20.00.00.0 0.00.024.2
1981-2010 Normals4.36.38.07.86.76.96.30.80.00.00.00.247.3
  Percent of Normal 04875514514 1140 0 0051
Dubois  D01.530.480.310.350.330.460.601.570.051.220.60 3.1710.67
  1981-2010 Normals0.810.570.280.240.380.401.101.641.281.110.861.249.91
  Percent of Normal 18984111 146 871155596 4 110 70256108
Snowfall5.35.05.57.07.36.510.00.50.00.0 0.0 3.550.6
1981-2010 Normals3.05.8 5.13.95.76.08.53.90.60.00.02.645.1
  Percent of Normal 17786108179128108 11813 0 0 0 135112
Fossil Butte
National Monument
  D21.620.811.690.190.660.390.641.33 0.060.490.712.7711.36
1981-2010 Normals1.110.860.740.490.680.820.981.411.030.850.931.1011.00
  Percent of Normal 146 94 22839 9748 65 94658 76 252103
Snowfall10.06.518.66.112.4 6.89.9T0.0 0.0 0.0 T70.3 
Green River  D21.001.050.970.100.550.450.751.410.050.050.552.099.02
  1981-2010 Normals0.810.410.44 0.34 0.430.71 0.851.230.980.55 0.68 0.908.33
  Percent of Normal 12325622029 128 6388 115 5 9 81 232108
Snowfall4.0 5.08.31.35.2 3.5 4.3 T0.00.0 0.0 T31.6 
1981-2010 Normals0.53.86.54.67.35.03.90.60.00.00.00.032.2
Percent of Normal 8001321282871 70 110 00 0 0 098
Jeffrey City  D00.430.310.200.060.990.152.132.640.080.240.21 3.1810.62
  1981-2010 Normals0.910.590.42 0.31 0.410.86 1.271.851.150.89 0.60 0.8010.06
  Percent of Normal 4753 48 19 241 17 168 143727 35398106
Snowfall3.02.03.01.012.02.0 26.0 6.0 0.00.00.0 9.064.0
1981-2010 Normals7.36.65.54.66.79.410.24.90.40.00.01.457.0
  Percent of Normal 4130552217921 255 1220 00 643112
Kaycee  D10.280.750.190.260.070.591.251.13 0.560.600.43 2.328.43
  1981-2010 Normals1.040.570.310.300.340.741.462.371.841.420.801.1812.37
  Percent of Normal 2713261 87 218086483042 5419768
Snowfall0.14.06.03.03.03.015.5 T0.00.0 0.0 4.038.6
1981-2010 Normals1.54.2 6.05.96.38.04.70.60.10.00.00.237.5
  Percent of Normal 795100514838 3300 0 0 2000103
Moose   D12.162.193.701.170.741.231.791.590.221.700.49 2.5919.57
  1981-2010 Normals1.472.642.672.581.821.621.491.881.611.291.291.4421.80
  Percent of Normal 14783 13945 41 76 120 85 14132 38 18090
Snowfall1.810.233.919.719.5 13.1 7.0 2.60.00.0 0.0 T107.8 
1981-2010 Normals4.824.144.736.926.615.97.42.20.00.00.00.2162.8 
  Percent of Normal 3842765373 82 95 1180 0 0 066 
Old Faithful  D02.641.314.291.680.492.012.461.270.980.650.97 3.8622.61
  1981-2010 Normals1.662.293.162.111.992.212.212.802.471.551.461.4625.37
  Percent of Normal  1595713680 25 91 111 454042 6626489
Snowfall14.0 11.5 49.5 38.5 9.0 27.0  21.0 T0.0 0.0  0.0 2.0172.5
1981-2010 Normals7.731.743.837.531.126.819.37.31.20.00.01.4207.8
  Percent of Normal 182 36 113 103 29  101 109 00 0  0 14383 
Powell Field Station   D00.240.090.150.290.070.150.391.990.161.450.262.277.51
  1981-2010 Normals0.560.180.130.210.130.290.511.401.350.870.52 0.656.80
  Percent of Normal 4350115138 54 52 76 142 12 167 50349110
Snowfall0.0 1.0 2.0 2.6  T 1.0 0.00.0 0.0  0.0 0.06.6
1981-2010 Normals 1.21.3 1.2 2.3 0.5 2.5 0.5 0.5 0.0 0.0 0.0 0.1 10.1
  Percent of Normal 77 167 113  0 200 0 0 0 0 065 
Riverton (downtown)  D00.360.520.350.210.450.171.481.540.020.380.053.098.62
  1981-2010 Normals0.850.410.240.280.330.560.981.451.210.780.500.838.42
  Percent of Normal 42  12714675 136 30 151 106 249 10372102
Snowfall3.2 3.56.1 3.8 8.9  4.3 24.7 6.7 0.00.0 0.0 5.766.9
1981-2010 Normals3.74.34.8 4.8 6.0 5.9 6.11.20.00.00.00.337.1
  Percent of Normal 86 81 127 79 148  73 405 558 00 0 1900180
Thermopolis  D10.660.170.38 0.370.590.511.332.720.190.260.093.1610.43
  1981-2010 Normals1.260.800.460.350.450.871.461.861.510.880.581.2311.71
  Percent of Normal  52 2183106 131 59 91 1461330 16 25789
Snowfall1.0 6.0 4.0 5.5 5.0  2.0 11.5 T0.0 0.0  0.0 2.037.0 
1981-2010 Normals2.4 3.7 4.5 5.6  4.62.5 2.8 0.4 0.0 0.0 0.0 0.2 26.7
  Percent of Normal 42 162 89 98 109 80 411 0 0 0 1000139 
 XX.X / M - Data partially or completely missing

Wyoming Climate
Statewide averages and ranks for periods including September 2013 will be available on October 15, 2013
Last Month
Precipitation - Percent of NormalTemperature - Departure from Normal
Wyoming: Last Month Percent of Normal PrecipitationWyoming: Last Month Departure from Normal Temperature
Statewide Average (inches)Statewide Average (°F)
20th Century Average20th Century Average
Rank - Driest to Wettest (119 Years)Rank - Warmest to Coldest (119 Years)
Driest Year on Record: 1944
Warmest Year on Record: 2003
Last 3 Months
Precipitation - Percent of NormalTemperature - Departure from Normal
Wyoming: Last Three Months Percent of Normal PrecipitationWyoming: Last 3 Months Departure from Normal Temperature
Statewide Average (inches)Statewide Average (°F)
20th Century Average20th Century Average
Rank - Driest to Wettest (119 Years)Rank - Warmest to Coldest (119 Years)
Driest Year on Record: 2012Warmest Year on Record: 2012
  
Water Year
Precipitation - Percent of NormalTemperature - Departure from Normal
Wyoming: Water Year Percent of Normal PrecipitationWyoming: Water Year Departure from Normal Temperature
Statewide Average (inches)Statewide Average (°F)
20th Century Average20th Century Average
Rank - Driest to Wettest (119 Years)Rank - Warmest to Coldest (119 Years)
Driest Period on Record: Oct 1918 - Aug 1919Warmest Period on Record: Oct 1933 - Aug 1934
  
Last 12 Months
Precipitation - Percent of NormalTemperature - Departure from Normal
Wyoming: Last 12 Months Percent of Normal PrecipitationWyoming: Last 12 Months Departure from Normal Temperature
Statewide Average (inches)Statewide Average (°F)
20th Century Average20th Century Average
Rank - Driest to Wettest (119 Years)
Rank - Warmest to Coldest (119 Years)
Driest Period on Record: Sep 1987 - Aug 1988Warmest Period on Record: Aug 1933 - Aug 1934