Western and Central Wyoming

Weather Forecast Office

Wet Spring Storm ending early on Mother's Day

SYNOPSIS: A strong spring storm is currently impacting the state with widespread rain and higher elevation snow. The storm will continue through Saturday before tapering off early Sunday morning. The mountains of western Wyoming should see snowfall accumulations from a few inches to over a foot, including a couple of inches in Yellowstone National Park. Many lower elevation locations have already received between 0.50" and 1.5" of rainfall, with more expected. The heaviest rain occurred in the Lander/Sinks Canyon area, with 1.75" to 2.4". The precipitation will continue to fall through 6AM Sunday, with the heaviest precipitation ending earlier Saturday morning.

IMPACTS: Mountain passes, such as Togwotee and South Pass, have received several inches of snow and may be slippery to travelers at times. Early season hikers and campers in the Wind Rivers, Absarokas, and Bighorns will encounter wet and cold conditions and should be prepared. Heavy precipitation combined with ongoing snow melt from the mountains will elevate stream and river flows, as well as potentially cause lowland flooding.

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Snow Totals and Wind Reports will be posted and updated here once the storm occurs (Please double check date and time of product)
323 NOUS45 KRIW 221339 PNSRIW WYZ001>020-022>030-230132- Public Information Statement National Weather Service Riverton WY 732 AM MDT Fri May 22 2026 ...PRECIPITATION REPORTS... A strong spring low pressure system made it through Wyoming May 21st, bringing widespread, and much needed, rain and snow. Snow levels were around 6000 feet, bringing snow to some lower elevations like in Natrona County. Listed below are rain/liquid equivalent totals of 0.1 inches and greater. Location Amount Elevation (ft.) ...Wyoming... ...Big Horn County... Byron 2.9 WSW (COCO) 0.61 in 4040 Byron (CWOP) 0.43 in 4022 Lovell (CWOP) 0.34 in 3964 Willow Creek 0.31 in 4310 Hyatt High 0.21 in 5670 Greybull 12.9 ENE (COCO) 0.16 in 4169 Greybull Airport (ASOS) 0.12 in 3934 ...Fremont County... Lander 7 WNW (COCO) 0.57 in 6042 Lander 5.9 SSE (COCO) 0.53 in 5556 Riverton 2 W (COCO) 0.46 in 5073 Lander Airport (ASOS) 0.42 in 5587 Riverton CWC (AWS) 0.42 in 5372 Lander 2 NNW (COCO) 0.40 in 5352 Rasberry 0.40 in 8833 Fort Washakie 3.7 SE (COCO) 0.35 in 5548 Lander 9.3 S (COCO) 0.34 in 5995 Lander 2 (CWOP) 0.33 in 5278 Riverton 1 (AWS) 0.33 in 4989 Riverton 1 (CWOP) 0.32 in 4920 Lander 1 (CWOP) 0.32 in 5797 Sharpnose 0.29 in 5555 Riverton Airport (ASOS) 0.29 in 5443 Wind River 0.27 in 9235 RED CANYON RANCH NC LANDER 1 0.22 in 5777 Anderson Ridge 0.20 in 8120 Kinnear 1 (CWOP) 0.20 in 5488 Camp Creek 0.18 in 7380 Jeffrey City (CWOP) 0.18 in 6442 Riverton 2 (CWOP) 0.16 in 4966 Crowheart (CWOP) 0.16 in 6137 Riverton 3 (CWOP) 0.15 in 5390 Elkhorn 0.11 in 8085 Pavillion 5.8 E (COCO) 0.10 in 5322 Riverton 2 (AWS) 0.10 in 4990 ...Hot Springs County... Grass Creek 0.28 in 7127 Lucerne (COOP) 0.23 in 4282 Anchor Dam (HADS) 0.13 in 6250 Kirby (CWOP) 0.11 in 4350 Thermopolis 33.2 W (COCO) 0.10 in 6612 ...Johnson County... Kaycee 14.6 W (COCO) 0.64 in 5247 Kaycee 10.9 WNW (COCO) 0.39 in 5481 Poker Creek 0.25 in 6439 Buffalo 2 (CWOP) 0.17 in 4370 Buffalo 15 W (HADS) 0.17 in 8398 Buffalo 1 (CWOP) 0.14 in 4675 School House 0.13 in 8604 Kaycee 5.2 NNW (COCO) 0.13 in 4917 Buffalo Airport (ASOS) 0.12 in 4925 Story 4 SE (HADS) 0.10 in 4662 ...Lincoln County... Smoot 5 SSE (COCO) 0.52 in 7005 Afton 2 (CWOP) 0.26 in 6267 Afton 1 (CWOP) 0.21 in 6257 Snake River (DOTAV) 0.16 in 5698 Alpine 5.9 S (COCO) 0.15 in 5932 Geneva 11 E (HADS) 0.14 in 6649 Etna 1 (CWOP) 0.13 in 5692 Star V Ranch 1 S (COCO) 0.12 in 6204 ...Natrona County... Powder River 0.1 NNE (COCO) 0.67 in 5714 Casper 1.5 SW (COCO) 0.66 in 5406 Casper 7.5 W (COCO) 0.63 in 5361 Casper 1.5 SW (COCO) 0.58 in 5350 Casper 0.7 WSW (COCO) 0.54 in 5224 Casper 2 ENE (COCO) 0.52 in 5252 Casper Airport (ASOS) 0.51 in 5348 Casper 7.1 SW (COCO) 0.50 in 5415 Evansville 5.4 ESE (COCO) 0.42 in 5174 Casper 17.2 SW (COCO) 0.26 in 5364 Mills 12.8 SSE (COCO) 0.26 in 7940 Fales Rock 0.25 in 6379 Casper (CWOP) 0.24 in 5341 Bar Nunn (CWOP) 0.11 in 5275 ...Park County... Wrbb Port No. 1 0.50 in 4750 Crandall 0.45 in 6640 Powell 3.9 ENE (COCO) 0.44 in 4288 Rattlesnake Mtn 0.43 in 8401 Grebe 0.43 in 7899 Eagle 0.40 in 7500 Cabin Creek 0.30 in 8650 Meeteetse 2 SE (COCO) 0.25 in 6071 Meeteetse (CWOP) 0.25 in 5749 Powell 2 (CWOP) 0.25 in 4381 Dry Creek 0.21 in 5520 Cody 7.3 SW (COCO) 0.20 in 5419 Cody 2 WSW (COCO) 0.11 in 5161 Cody Airport (AWOS) 0.11 in 5089 Pahaska (HADS) 0.10 in 6798 Wapiti (CWOP) 0.10 in 5993 ...Sublette County... Boulder (CWOP) 0.48 in 7338 Boulder (HADS) 0.45 in 7350 Daniel (HADS) 0.27 in 7470 Half Moon 0.26 in 8529 Pinedale 14 NW (COCO) 0.17 in 7464 Pinedale 6.3 SE (COCO) 0.16 in 7314 Hoback 0.12 in 6726 ...Sweetwater County... Rock Springs (CWOP) 0.24 in 6432 Rock Springs Airport (ASOS) 0.20 in 6759 Green River (COOP) 0.20 in 6160 ...Teton County... Moran 2 (CWOP) 0.55 in 6748 Burro Hill 0.44 in 7250 Alta (CWOP) 0.41 in 6460 Jackson 1 (CWOP) 0.33 in 6236 Coyote Meadows 0.28 in 6830 Jackson 2 (CWOP) 0.24 in 6158 Rendezvous Bowl (JHMR) 0.19 in 9634 B-T Portable No. 1 0.18 in 6631 Alta (HADS) 0.16 in 6430 Hoback (CWOP) 0.16 in 5928 Mid Mtn (JHMR) 0.15 in 8225 Jackson (HADS) 0.14 in 6240 YNP S Entrance 5 SSW (HADS) 0.14 in 7020 Teton Pass MP12 (DOTAV) 0.14 in 8007 Raymer (JHMR) 0.13 in 9657 YNP S Entrance (HADS) 0.12 in 6898 Grand Teton 0.12 in 6729 Jackson Airport (AWOS) 0.11 in 6450 Old Faithful (HADS) 0.11 in 7319 Moran 1 (CWOP) 0.10 in 6867 ...Washakie County... Ten Sleep 0.3 SSW (COCO) 0.31 in 4426 Worland 9.6 N (COCO) 0.28 in 4043 Worland 2.3 NE (COCO) 0.22 in 4107 Worland (AWS) 0.22 in 4400 Worland Airport (ASOS) 0.21 in 4226 Leigh Creek 0.19 in 8202 Worland (CWOP) 0.19 in 4064 Pistol Draw 0.19 in 4520 Split Rock Creek 0.16 in 6554 Worland 8 SW (COCO) 0.13 in 4136 Observations are collected from a variety of sources with varying equipment and exposures. We thank all volunteer weather observers for their dedication. Not all data listed are considered official. $$

Snow Totals and Wind Reports will be posted and updated here once the storm occurs
(Please double check date and time of product)

                        
323
NOUS45 KRIW 221339
PNSRIW
WYZ001>020-022>030-230132-

Public Information Statement
National Weather Service Riverton WY
732 AM MDT Fri May 22 2026

...PRECIPITATION REPORTS...

A strong spring low pressure system made it through Wyoming May
21st, bringing widespread, and much needed, rain and snow. Snow
levels were around 6000 feet, bringing snow to some lower elevations
like in Natrona County. Listed below are rain/liquid equivalent
totals of 0.1 inches and greater.

Location                     Amount     Elevation (ft.)

...Wyoming...

...Big Horn County...
Byron 2.9 WSW (COCO)         0.61 in    4040
Byron (CWOP)                 0.43 in    4022
Lovell (CWOP)                0.34 in    3964
Willow Creek                 0.31 in    4310
Hyatt High                   0.21 in    5670
Greybull 12.9 ENE (COCO)     0.16 in    4169
Greybull Airport (ASOS)      0.12 in    3934

...Fremont County...
Lander 7 WNW (COCO)          0.57 in    6042
Lander 5.9 SSE (COCO)        0.53 in    5556
Riverton 2 W (COCO)          0.46 in    5073
Lander Airport (ASOS)        0.42 in    5587
Riverton CWC (AWS)           0.42 in    5372
Lander 2 NNW (COCO)          0.40 in    5352
Rasberry                     0.40 in    8833
Fort Washakie 3.7 SE (COCO)  0.35 in    5548
Lander 9.3 S (COCO)          0.34 in    5995
Lander 2 (CWOP)              0.33 in    5278
Riverton 1 (AWS)             0.33 in    4989
Riverton 1 (CWOP)            0.32 in    4920
Lander 1 (CWOP)              0.32 in    5797
Sharpnose                    0.29 in    5555
Riverton Airport (ASOS)      0.29 in    5443
Wind River                   0.27 in    9235
RED CANYON RANCH NC LANDER 1 0.22 in    5777
Anderson Ridge               0.20 in    8120
Kinnear 1 (CWOP)             0.20 in    5488
Camp Creek                   0.18 in    7380
Jeffrey City (CWOP)          0.18 in    6442
Riverton 2 (CWOP)            0.16 in    4966
Crowheart (CWOP)             0.16 in    6137
Riverton 3 (CWOP)            0.15 in    5390
Elkhorn                      0.11 in    8085
Pavillion 5.8 E (COCO)       0.10 in    5322
Riverton 2 (AWS)             0.10 in    4990

...Hot Springs County...
Grass Creek                  0.28 in    7127
Lucerne (COOP)               0.23 in    4282
Anchor Dam (HADS)            0.13 in    6250
Kirby (CWOP)                 0.11 in    4350
Thermopolis 33.2 W (COCO)    0.10 in    6612

...Johnson County...
Kaycee 14.6 W (COCO)         0.64 in    5247
Kaycee 10.9 WNW (COCO)       0.39 in    5481
Poker Creek                  0.25 in    6439
Buffalo 2 (CWOP)             0.17 in    4370
Buffalo 15 W (HADS)          0.17 in    8398
Buffalo 1 (CWOP)             0.14 in    4675
School House                 0.13 in    8604
Kaycee 5.2 NNW (COCO)        0.13 in    4917
Buffalo Airport (ASOS)       0.12 in    4925
Story 4 SE (HADS)            0.10 in    4662

...Lincoln County...
Smoot 5 SSE (COCO)           0.52 in    7005
Afton 2 (CWOP)               0.26 in    6267
Afton 1 (CWOP)               0.21 in    6257
Snake River (DOTAV)          0.16 in    5698
Alpine 5.9 S (COCO)          0.15 in    5932
Geneva 11 E (HADS)           0.14 in    6649
Etna 1 (CWOP)                0.13 in    5692
Star V Ranch 1 S (COCO)      0.12 in    6204

...Natrona County...
Powder River 0.1 NNE (COCO)  0.67 in    5714
Casper 1.5 SW (COCO)         0.66 in    5406
Casper 7.5 W (COCO)          0.63 in    5361
Casper 1.5 SW (COCO)         0.58 in    5350
Casper 0.7 WSW (COCO)        0.54 in    5224
Casper 2 ENE (COCO)          0.52 in    5252
Casper Airport (ASOS)        0.51 in    5348
Casper 7.1 SW (COCO)         0.50 in    5415
Evansville 5.4 ESE (COCO)    0.42 in    5174
Casper 17.2 SW (COCO)        0.26 in    5364
Mills 12.8 SSE (COCO)        0.26 in    7940
Fales Rock                   0.25 in    6379
Casper (CWOP)                0.24 in    5341
Bar Nunn (CWOP)              0.11 in    5275

...Park County...
Wrbb Port No. 1              0.50 in    4750
Crandall                     0.45 in    6640
Powell 3.9 ENE (COCO)        0.44 in    4288
Rattlesnake Mtn              0.43 in    8401
Grebe                        0.43 in    7899
Eagle                        0.40 in    7500
Cabin Creek                  0.30 in    8650
Meeteetse 2 SE (COCO)        0.25 in    6071
Meeteetse (CWOP)             0.25 in    5749
Powell 2 (CWOP)              0.25 in    4381
Dry Creek                    0.21 in    5520
Cody 7.3 SW (COCO)           0.20 in    5419
Cody 2 WSW (COCO)            0.11 in    5161
Cody Airport (AWOS)          0.11 in    5089
Pahaska (HADS)               0.10 in    6798
Wapiti (CWOP)                0.10 in    5993

...Sublette County...
Boulder (CWOP)               0.48 in    7338
Boulder (HADS)               0.45 in    7350
Daniel (HADS)                0.27 in    7470
Half Moon                    0.26 in    8529
Pinedale 14 NW (COCO)        0.17 in    7464
Pinedale 6.3 SE (COCO)       0.16 in    7314
Hoback                       0.12 in    6726

...Sweetwater County...
Rock Springs (CWOP)          0.24 in    6432
Rock Springs Airport (ASOS)  0.20 in    6759
Green River (COOP)           0.20 in    6160

...Teton County...
Moran 2 (CWOP)               0.55 in    6748
Burro Hill                   0.44 in    7250
Alta (CWOP)                  0.41 in    6460
Jackson 1 (CWOP)             0.33 in    6236
Coyote Meadows               0.28 in    6830
Jackson 2 (CWOP)             0.24 in    6158
Rendezvous Bowl (JHMR)       0.19 in    9634
B-T Portable No. 1           0.18 in    6631
Alta (HADS)                  0.16 in    6430
Hoback (CWOP)                0.16 in    5928
Mid Mtn (JHMR)               0.15 in    8225
Jackson (HADS)               0.14 in    6240
YNP S Entrance 5 SSW (HADS)  0.14 in    7020
Teton Pass MP12 (DOTAV)      0.14 in    8007
Raymer (JHMR)                0.13 in    9657
YNP S Entrance (HADS)        0.12 in    6898
Grand Teton                  0.12 in    6729
Jackson Airport (AWOS)       0.11 in    6450
Old Faithful (HADS)          0.11 in    7319
Moran 1 (CWOP)               0.10 in    6867

...Washakie County...
Ten Sleep 0.3 SSW (COCO)     0.31 in    4426
Worland 9.6 N (COCO)         0.28 in    4043
Worland 2.3 NE (COCO)        0.22 in    4107
Worland (AWS)                0.22 in    4400
Worland Airport (ASOS)       0.21 in    4226
Leigh Creek                  0.19 in    8202
Worland (CWOP)               0.19 in    4064
Pistol Draw                  0.19 in    4520
Split Rock Creek             0.16 in    6554
Worland 8 SW (COCO)          0.13 in    4136

Observations are collected from a variety of sources with varying
equipment and exposures. We thank all volunteer weather observers
for their dedication. Not all data listed are considered official.

$$

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