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Flooding Possible in the Southwest U.S.; Coastal Storm to Impact the East

Heavy to excessive rainfall is expected today into Wednesday over New Mexico into far west Texas. Flash flooding and debris flows in wildfire burn areas will be possible. A strong coastal storm will develop off the Mid-Atlantic coast Wednesday, intensifying toward southern New England this weekend. Significant coastal flooding, strong rip currents, and beach erosion from high surf expected. Read More >

Summary | Forecast | Observed Snow and Wind | Travel Center | Monitoring & Reporting | Safety


SYNOPSIS:

Significant snow and/or blowing snow will continue this morning for areas east of the Continental Divide as well as Sweetwater County. Improving conditions are expected by late this morning into the afternoon, as the snow becomes lighter and winds weaken.

 

IMPACTS:

  • Severely reduced visibility to near zero early Monday morning from snow and blowing snow.
  • As of 3 AM roads were closed in many locations. Please visit wyoroad.info for the latest road conditions.
  • Bitter cold with frostbite and hypothermia possible.

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are in effect through this morning.

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Forecast Snowfall 5 AM
to 5 PM Monday


 

 

High and Low Temperature Forecasts

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Today's High Temperature
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Tonight's Low Temperature
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Tomorrow's High Temperature
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Tomorrow Night's Low Temperature
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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)

                        
325
NOUS45 KRIW 201825
PNSRIW
WYZ001>020-022>030-210600-

Public Information Statement
National Weather Service Riverton WY
1225 PM MDT Sun Sep 20 2026

...24-HOUR RAINFALL TOTALS ENDING 12 PM SUNDAY...

Location                     Amount     Elev.
                                        (ft.)
...Big Horn County...
Willow Creek                 0.49 in    4310
Bone Springs (SNO)           0.40 in    9350
Mill Creek                   0.23 in    8947
Lovell (CWOP)                0.14 in    3964
Greybull Airport (ASOS)      0.11 in    3934
Byron (CWOP)                 0.10 in    4022
Hyatt High                   0.09 in    5670
Byron 2.9 WSW (COCO)         0.08 in    4040

...Fremont County...
Lander 0.4 WNW (COCO)        2.57 in    5367
Lander 2 (CWOP)              2.27 in    5278
Lander Airport (ASOS)        2.14 in    5587
Sharpnose                    2.04 in    5555
Riverton 1.3 ESE (COCO)      1.98 in    4998
Riverton 2.2 WSW (COCO)      1.83 in    5033
Riverton 4.1 SW (COCO)       1.65 in    5034
Shoshoni 13 NW (HADS)        1.64 in    4760
Kinnear 1 (CWOP)             1.39 in    5488
NWS Riverton Office          1.36 in    5575
Riverton Airport (ASOS)      1.34 in    5443
Pavillion 5.8 E (COCO)       1.33 in    5322
Riverton 8.4 N               1.27 in    5232
Riverton (COOP)              1.26 in    4955
Riverton CWC (AWS)           1.26 in    5372
Riverton 3 (CWOP)            1.18 in    5390
Shoshoni                     1.17 in    4820
Lander 4 WSW (COCO)          1.06 in    5768
Riverton 17.8 NW             1.02 in    5393
Pavillion 4 E (COCO)         1.00 in    5353
RED CANYON RANCH NC LANDER 1 0.97 in    5777
Riverton 1 (AWS)             0.95 in    4989
Lander 6 SW (COCO)           0.90 in    6088
Lander 7 WNW (COCO)          0.89 in    6042
Lander 9 SSE (COCO)          0.89 in    5818
RED CANYON RANCH NC LANDER 1 0.89 in    5777
Fort Washakie 3.7 SE (COCO)  0.88 in    5548
Riverton 1 (CWOP)            0.84 in    4920
Lander 5.9 SSE (COCO)        0.80 in    5556
Lander 1 (CWOP)              0.75 in    5797
Lander 9.3 S (COCO)          0.65 in    5995
Wind River                   0.63 in    9235
Crowheart (CWOP)             0.41 in    6137
Castle Creek (SNO)           0.40 in    8399
Burroughs Creek (SNO)        0.30 in    8750
Jeffrey City (CWOP)          0.24 in    6442
Anderson Ridge               0.16 in    8120
Dubois (COOP)                0.06 in    6955
Camp Creek                   0.05 in    7380
Riverton 2 (AWS)             0.05 in    4990
Rasberry                     0.04 in    8833
Elkhorn                      0.01 in    8085

...Hot Springs County...
Thermopolis 15.8 WNW (COCO)  0.83 in    5164
Lucerne (COOP)               0.77 in    4282
Thermopolis 18.6 E (COCO)    0.73 in    4879
Thermopolis 0.3 NE (COCO)    0.70 in    4341
Anchor Dam (HADS)            0.66 in    6250
Thermopolis (CWOP)           0.61 in    4425
Thermopolis 33.2 W (COCO)    0.59 in    6612
Thermopolis 2.8 SSW (COCO)   0.52 in    4617
Thermopolis 10.7 N (COCO)    0.48 in    4352
Kirby (CWOP)                 0.47 in    4350
Thermopolis 6 NNE (COCO)     0.37 in    4434
Grass Creek                  0.35 in    7127
Hot Springs Airport (AWOS)   0.26 in    4903

...Johnson County...
Poker Creek                  0.77 in    6439
Buffalo 4 SSW (COCO)         0.73 in    5262
Buffalo 2 (CWOP)             0.61 in    4370
Cloud Peak Reservoir (SNO)   0.60 in    9859
Buffalo 1 (CWOP)             0.56 in    4675
Kaycee 5.2 NNW (COCO)        0.50 in    4917
Buffalo 0.8 ENE (COCO)       0.46 in    4657
Buffalo Airport (ASOS)       0.45 in    4925
Barnum (HADS)                0.38 in    5075
School House                 0.32 in    8604
Bear Trap Meadow (SNO)       0.30 in    8200
Story 8 S (HADS)             0.29 in    5278
Kaycee 14.6 W (COCO)         0.24 in    5247
Kaycee 17 NNW (COCO)         0.24 in    5056
Kaycee 10.9 WNW (COCO)       0.20 in    5481
Buffalo 15 W (HADS)          0.17 in    8398
Kaycee 2 (CWOP)              0.16 in    5403
Buffalo 13 SSE (COCO)        0.11 in    4819
Story 4 SE (HADS)            0.11 in    4662

...Lincoln County...
Blind Bull Summit (SNO)      0.70 in    8649
Cottonwood Creek (SNO)       0.50 in    7669
Afton 1 (CWOP)               0.42 in    6257
Afton 2 (CWOP)               0.31 in    6267
Afton 0.6 NW (AG)            0.26 in    6210
Geneva 11 E (HADS)           0.18 in    6649
Kelly                        0.17 in    8470
Thayne 2 SE (COCO)           0.07 in    6086
Star Valley Ranch (CWOP)     0.06 in    6370
Star V Ranch 0.3 WNW (COCO)  0.05 in    6253
Bedford 1.8 S (COCO)         0.04 in    6302
Alpine 5.9 S (COCO)          0.04 in    5932
Bedford (CWOP)               0.03 in    6279
Snake River (DOTAV)          0.01 in    5698
Etna 1 (CWOP)                0.01 in    5692

...Natrona County...
Powder River 0.1 NNE (COCO)  1.59 in    5714
Casper (CWOP)                0.25 in    5341
Reno Hill (SNO)              0.20 in    8399
Casper Mtn                   0.19 in    7740
Fales Rock                   0.18 in    6379
Bar Nunn (CWOP)              0.14 in    5275
Casper 0.7 WSW (COCO)        0.12 in    5224
Casper Airport (ASOS)        0.12 in    5348
Casper 1 NW (COCO)           0.11 in    5142
Mills 2 SW (COCO)            0.10 in    5211
Casper 6.6 S                 0.08 in    7978
Casper 1.5 SW (COCO)         0.05 in    5406
Casper 1.7 W (COCO)          0.05 in    5146
Casper 1.5 SW (COCO)         0.04 in    5350
Casper 7.5 W (COCO)          0.03 in    5361
Casper 3 E (COCO)            0.03 in    5378
Casper 1.2 E (COCO)          0.02 in    5285
Casper 17.2 SW (COCO)        0.01 in    5364
Mills 12.8 SSE (COCO)         Trace     7940

...Park County...
Wapiti (CWOP)                0.44 in    5993
Tower Falls YNP (COOP)       0.34 in    6275
Cody 20.9 W (COCO)           0.30 in    5815
Wapiti (HADS)                0.24 in    5398
Cody 21.9 W (COCO)           0.23 in    5887
Rattlesnake Mtn              0.23 in    8401
Cody 2 WSW (COCO)            0.21 in    5161
Cody (COOP)                  0.21 in    5280
Eagle                        0.19 in    7500
Cody 1 SE (COCO)             0.11 in    5102
Powell 0.5 WNW (COCO)        0.08 in    4412
Powell 0.2 ESE (COCO)        0.08 in    4392
Fort Collins (CWOP)          0.08 in    5102
Dry Creek                    0.08 in    5520
Cody 0.4 SE (COCO)           0.07 in    5090
Meeteetse 4 NNE (COCO)       0.07 in    5522
Powell 24.2 WNW (COCO)       0.07 in    4412
Grebe                        0.07 in    7899
Powell 4 WSW (COCO)          0.06 in    4509
Powell 2 (CWOP)              0.06 in    4381
Meeteetse 2 SE (COCO)        0.05 in    6071
Powell 5 E (COCO)            0.05 in    4276
Crandall                     0.04 in    6640
Meeteetse (CWOP)             0.04 in    5749
Pahaska (COOP)               0.03 in    6692
Cabin Creek                  0.03 in    8650
Quadrant                     0.03 in    7900
Cody Airport (AWOS)          0.03 in    5089
Cody 7.3 SW (COCO)           0.02 in    5419
Cody 6.5 SW                  0.02 in    5400
Cody 7.2 NNE (COCO)          0.01 in    4859
Wrbb Port No. 1              0.01 in    4750
Clark (CWOP)                 0.01 in    4270

...Sublette County...
Elkhart Park (SNO)           1.10 in    9399
Marbleton (CWOP)             0.51 in    6850
Daniel (COOP)                0.34 in    7341
Marbleton (AWS)              0.23 in    6838
Half Moon                    0.14 in    8529
Big Piney Airport (ASOS)     0.13 in    6946
Pinedale 5 SE (COCO)         0.10 in    7144
Kendall RS (SNO)             0.10 in    7740
Pinedale 1 NNW (COCO)        0.06 in    7213
Boulder (COOP)               0.06 in    6940
Hoback                       0.06 in    6726
Pinedale 13 SE               0.05 in    7050
Boulder (CWOP)               0.04 in    7338
Pinedale 14 NW (COCO)        0.02 in    7464
Cora 14.2 N (COCO)           0.02 in    7740
Snider Basin                 0.02 in    8200

...Sweetwater County...
Rock Springs 7.2 SSE         0.19 in    6760
Snows Springs                0.16 in    7549
Rock Springs Airport (ASOS)  0.10 in    6759
Lonetree 9.4 E (COCO)        0.05 in    7172
Green River (COOP)           0.05 in    6160
Manila 2 NE (USGS)           0.05 in    6060
Green River 2 SSE (COCO)     0.03 in    6209
Green River 1 SE (COCO)      0.02 in    6176
Green River 0.8 SSW (COCO)   0.02 in    6314
Rock Springs (CWOP)          0.02 in    6432
Green River 0.5 NNW (COCO)   0.01 in    6185
Rock Springs 1.6 W (COCO)    0.01 in    6397
Mckinnon (CWOP)              0.01 in    7086

...Teton County...
Base Camp (SNO)              0.50 in    7029
Thumb Divide (SNO)           0.30 in    7979
Moran 2 (CWOP)               0.24 in    6748
Gros Ventre Summit (SNO)     0.20 in    8750
Burro Hill                   0.18 in    7250
Togwotee Mtn Lodge (BTAC)    0.15 in    9190
Grand Teton                  0.15 in    6729
Teton Village 2 NE (COCO)    0.12 in    6339
Jackson Dam (HADS)           0.11 in    6776
YNP S Entrance 5 SSW (HADS)  0.11 in    7020
Wilson 3 SSW (COCO)          0.10 in    7010
Base (JHMR)                  0.10 in    6611
YNP S Entrance (HADS)        0.09 in    6898
Rendezvous Bowl (JHMR)       0.07 in    9634
Moran 1 (CWOP)               0.07 in    6867
Bechler Ranger Station       0.06 in    6432
YNP S Entrance 3 W (HADS)    0.05 in    7040
Bechler                      0.05 in    6399
Yellowstone Lake (ASOS)      0.05 in    7835
Old Faithful (HADS)          0.04 in    7319
Raymer (JHMR)                0.04 in    9657
Jackson (COOP)               0.03 in    6210
Mid Mtn (JHMR)               0.02 in    8225
B-T Portable No. 1           0.02 in    6631
Alta (CWOP)                  0.02 in    6460
Jackson 12 NE (COCO)         0.01 in    6663
Jackson Airport (AWOS)       0.01 in    6450
Coyote Meadows               0.01 in    6830

...Washakie County...
Worland Airport (ASOS)       0.73 in    4226
Worland 8 SW (COCO)          0.65 in    4136
Worland 14.4 SW (COCO)       0.60 in    4216
Split Rock Creek             0.60 in    6554
Pistol Draw                  0.55 in    4520
Worland (AWS)                0.49 in    4400
Ten Sleep 27 S (COCO)        0.29 in    5002
Worland 2.3 NE (COCO)        0.23 in    4107
Worland (CWOP)               0.23 in    4064
Leigh Creek                  0.18 in    8202
Ten Sleep 5 NNW (COCO)       0.17 in    4531
Ten Sleep 2 SE (HADS)        0.09 in    4418
Worland 9.6 N (COCO)         0.05 in    4043
Ten Sleep 0.3 SSW (COCO)     0.02 in    4426
Worland (COOP)               0.02 in    4058

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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