Severe thunderstorms and heavy rain are expected across portions of the mid-Mississippi Valley into the Ohio Valley and portions of Arizona. Dangerous heat persists in the South and Southeast while building into the Southwest. Overnight lows will be so warm that, when combined with oppressive dew points, little-to-no relief from the scorching daytime highs will be available. Read More >
Summary | Forecast & Snow, Wind Reports | Travel Center | Monitoring & Reporting | Safety
SYNOPSIS: A winter storm will spread moderate to heavy amounts of snow, along with windy conditions, into Western Wyoming tonight through early Monday morning. The heaviest snowfall is expected to occur Sunday night as the main system and associated cold front move across the area. Light snowfall is expected to spread east of the Divide late Sunday night and into the day Monday, as the strong cold front plows southeast across Wyoming. Much colder air is expected in the wake of this cold front Sunday night and Monday. High temperatures on Tuesday will be about 20 degrees below average, with highs generally in the teens.
IMPACTS:
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High Wind Statement |
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Winter Storm Warnings/Advisories thru 12pm Monday |
Forecast Additional Snowfall from Click Image To Enlarge |
Preliminary Snowfall and Wind Reports |
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047
NOUS45 KRIW 160051
PNSRIW
WYZ001>020-022>030-161245-
PUBLIC INFORMATION STATEMENT
NATIONAL WEATHER SERVICE RIVERTON WY
645 PM MDT SAT AUG 15 2026
...SUMMARY...
THE WEATHER PATTERN ALLOWED FOR MONSOONAL MOISTURE TO PUSH INTO
WYOMING EARLIER THIS WEEK. AS A RESULT OF THIS INCREASED MOISTURE
NUMEROUS RAIN SHOWERS AND THUNDERSTORMS DEVELOPED BEGINNING
WEDNESDAY AFTERNOON. CASPER ENDED UP WITH SOME IMPRESSIVE RAIN
TOTALS, MAINLY FROM MULTIPLE ROUNDS OF STORMS THURSDAY. OVERALL,
THIS ENDED UP BEING DECENT RAIN FOR MOST OF WESTERN AND CENTRAL
WYOMING.
...PRECIPITATION REPORTS...
LOCATION AMOUNT TIME/DATE ELEVATION (FT.)
...WYOMING...
...BIG HORN COUNTY...
COWLEY 0.3 NNE (COCO) 0.24 IN 0700 AM 08/15 4016
LOVELL 0.4 NNW (COCO) 0.19 IN 0700 AM 08/15 3626
DEAVER (COOP) 0.18 IN 0800 AM 08/15 4105
LOVELL 0.14 IN 0700 AM 08/15 3848
LOVELL 0.5 ESE (COCO) 0.13 IN 1005 AM 08/15 3829
BYRON 2.9 WSW (COCO) 0.12 IN 0700 AM 08/15 4040
GREYBULL AIRPORT (ASOS) 0.09 IN 0553 PM 08/15 3934
...FREMONT COUNTY...
PAVILLION 4 E (COCO) 0.64 IN 0700 AM 08/15 5353
LANDER 2 NNW (COCO) 0.38 IN 0700 AM 08/15 5352
LANDER AIRPORT (ASOS) 0.34 IN 0553 PM 08/15 5587
LANDER 4 WSW (COCO) 0.30 IN 0800 AM 08/15 5768
LANDER 7 WNW (COCO) 0.25 IN 0700 AM 08/15 6042
RIVERTON 2.2 WSW (COCO) 0.21 IN 0700 AM 08/15 5033
LANDER 5.9 SSE (COCO) 0.20 IN 0700 AM 08/15 5556
LANDER 9 SSE (COCO) 0.20 IN 0700 AM 08/15 5818
RIVERTON 1.9 W (COCO) 0.20 IN 0800 AM 08/15 5123
LANDER 5.1 SW (COCO) 0.18 IN 0700 AM 08/15 5980
LANDER 6 SW (COCO) 0.18 IN 0700 AM 08/15 6088
RIVERTON AIRPORT (ASOS) 0.17 IN 0553 PM 08/15 5443
PAVILLION 5.8 E (COCO) 0.07 IN 0700 AM 08/15 5322
RIVERTON (COOP) 0.06 IN 0700 AM 08/15 4955
...HOT SPRINGS COUNTY...
THERMOPOLIS 15.8 WNW (COCO) 0.78 IN 0800 AM 08/15 5164
THERMOPOLIS 18.6 E (COCO) 0.55 IN 0800 AM 08/15 4879
LUCERNE (COOP) 0.42 IN 0700 AM 08/15 4282
HOT SPRINGS AIRPORT (AWOS) 0.40 IN 0555 PM 08/15 4903
THERMOPOLIS 33.2 W (COCO) 0.39 IN 0700 AM 08/15 6612
THERMOPOLIS 2.8 SSW (COCO) 0.32 IN 0800 AM 08/15 4617
THERMOPOLIS 6 NNE (COCO) 0.19 IN 0700 AM 08/15 4434
THERMOPOLIS 10.7 N (COCO) 0.07 IN 0800 AM 08/15 4352
...JOHNSON COUNTY...
BUFFALO 13 SSE (COCO) 0.35 IN 0700 AM 08/15 4819
KAYCEE 14.6 W (COCO) 0.32 IN 0700 AM 08/15 5247
KAYCEE 10.9 WNW (COCO) 0.26 IN 0700 AM 08/15 5481
KAYCEE 17 NNW (COCO) 0.24 IN 0700 AM 08/15 5056
KAYCEE 5.2 NNW (COCO) 0.14 IN 0700 AM 08/15 4917
BUFFALO 0.6 E (COCO) 0.13 IN 0700 AM 08/15 4696
CLEARMONT 16 SE (COCO) 0.10 IN 0700 AM 08/15 3761
BUFFALO AIRPORT (ASOS) 0.02 IN 0553 PM 08/15 4925
...LINCOLN COUNTY...
SMOOT 5 SSE (COCO) 1.00 IN 0700 AM 08/15 7005
THAYNE 2 SE (COCO) 0.90 IN 0700 AM 08/15 6086
BEDFORD 1.8 S (COCO) 0.82 IN 0700 AM 08/15 6302
FOSSIL BUTTE (COOP) 0.80 IN 0400 PM 08/15 6785
STAR V RANCH 0.3 WNW (COCO) 0.73 IN 0800 AM 08/15 6253
STAR V RANCH 1 S (COCO) 0.70 IN 0730 AM 08/15 6204
ETNA 3.3 N (COCO) 0.44 IN 0800 AM 08/15 5989
ALPINE 5.9 S (COCO) 0.39 IN 0700 AM 08/15 5932
...NATRONA COUNTY...
CASPER AIRPORT (ASOS) 1.73 IN 0553 PM 08/15 5348
CASPER 1.7 W (COCO) 1.50 IN 0700 AM 08/15 5146
CASPER 1.2 E (COCO) 1.35 IN 0800 AM 08/15 5285
CASPER 0.7 WSW (COCO) 1.29 IN 0700 AM 08/15 5224
POWDER RIVER 0.1 NNE (COCO) 1.17 IN 0700 AM 08/15 5714
CASPER 1.5 SW (COCO) 1.05 IN 0700 AM 08/15 5406
CASPER 5 SSW (COCO) 1.03 IN 0700 AM 08/15 6262
MILLS 12.8 SSE (COCO) 0.84 IN 0700 AM 08/15 7940
CASPER 17.2 SW (COCO) 0.80 IN 0700 AM 08/15 5364
CASPER 6.6 S T IN 0800 AM 08/15 7978
...PARK COUNTY...
TOWER FALLS YNP (COOP) 0.94 IN 0800 AM 08/15 6275
PAHASKA (COOP) 0.74 IN 1134 AM 08/15 6692
MEETEETSE 4 NNE (COCO) 0.74 IN 0800 AM 08/15 5522
RALSTON 6 SW (COCO) 0.49 IN 0700 AM 08/15 4763
MEETEETSE 2 SE (COCO) 0.39 IN 0700 AM 08/15 6071
MEETEETSE 0.2 NE (COCO) 0.38 IN 0700 AM 08/15 5807
CODY (COOP) 0.32 IN 0857 AM 08/15 5280
CODY 7.3 SW (COCO) 0.32 IN 0700 AM 08/15 5419
CODY 2 WSW (COCO) 0.31 IN 0700 AM 08/15 5161
POWELL 4 WSW (COCO) 0.29 IN 0700 AM 08/15 4509
CLARK (COOP) 0.26 IN 0800 AM 08/15 4117
CODY 1 SE (COCO) 0.26 IN 0700 AM 08/15 5102
CODY 0.4 SE (COCO) 0.25 IN 0700 AM 08/15 5090
CODY 2.9 ESE (COCO) 0.23 IN 0700 AM 08/15 5093
CODY 4.3 NNE (COCO) 0.21 IN 0915 AM 08/15 5074
POWELL 0.5 WNW (COCO) 0.20 IN 0700 AM 08/15 4412
CODY AIRPORT (AWOS) 0.17 IN 0556 PM 08/15 5089
POWELL 3.9 ENE (COCO) 0.17 IN 0700 AM 08/15 4288
CODY 5.3 E (COCO) 0.14 IN 0700 AM 08/15 5081
CODY 21.9 W (COCO) 0.02 IN 1124 AM 08/15 5887
...SUBLETTE COUNTY...
DANIEL (COOP) 0.81 IN 0800 AM 08/15 7341
CORA 14.2 N (COCO) 0.64 IN 0700 AM 08/15 7740
PINEDALE 2 WSW (COCO) 0.48 IN 0800 AM 08/15 7302
BIG PINEY AIRPORT (ASOS) 0.44 IN 0553 PM 08/15 6946
PINEDALE 6.3 SE (COCO) 0.43 IN 0653 AM 08/15 7314
PINEDALE 1 NNW (COCO) 0.42 IN 0800 AM 08/15 7213
PINEDALE 0.3 SSW (COCO) 0.39 IN 0800 AM 08/15 7177
BOULDER (COOP) 0.37 IN 0800 AM 08/15 6940
...SWEETWATER COUNTY...
GREEN RIVER 0.8 SSW (COCO) 1.02 IN 0900 AM 08/15 6314
GREEN RIVER (COOP) 0.90 IN 0700 AM 08/15 6160
GREEN RIVER 0.5 NNW (COCO) 0.84 IN 0700 AM 08/15 6185
ROCK SPRINGS 4 NNW (COCO) 0.81 IN 0700 AM 08/15 6498
GREEN RIVER 1 SSE (COCO) 0.76 IN 0800 AM 08/15 6241
GREEN RIVER 1 SE (COCO) 0.67 IN 0700 AM 08/15 6176
LONETREE 9.4 E (COCO) 0.65 IN 0700 AM 08/15 7172
ROCK SPRINGS 6.7 WSW (COCO) 0.61 IN 0700 AM 08/15 6252
GREEN RIVER 2 SSE (COCO) 0.60 IN 0700 AM 08/15 6209
ROCK SPRINGS 1 SSE (COCO) 0.39 IN 0800 AM 08/15 6330
ROCK SPRINGS AIRPORT (ASOS) 0.28 IN 0554 PM 08/15 6759
ROCK SPRINGS 7.2 SSE 0.21 IN 0800 AM 08/15 6760
...TETON COUNTY...
YELLOWSTONE LAKE (ASOS) 1.56 IN 0556 PM 08/15 7835
BECHLER RANGER STATION 1.19 IN 0800 AM 08/15 6432
JACKSON (COOP) 0.94 IN 0900 AM 08/15 6210
JACKSON 0.3 ENE (COCO) 0.86 IN 0700 AM 08/15 6264
WILSON 1 SE (COCO) 0.80 IN 0700 AM 08/15 6155
TETON VILLAGE 2 NE (COCO) 0.64 IN 0700 AM 08/15 6339
JACKSON AIRPORT (AWOS) 0.59 IN 0556 PM 08/15 6450
MOOSE (COOP) 0.59 IN 0900 AM 08/15 6444
JACKSON 5 NW (COCO) 0.50 IN 0700 AM 08/15 6217
LAKE YELLOWSTONE (COOP) 0.40 IN 0715 AM 08/15 7892
JACKSON 12 NE (COCO) 0.36 IN 0952 AM 08/15 6663
...WASHAKIE COUNTY...
TEN SLEEP 2.3 ENE (COCO) 0.25 IN 0700 AM 08/15 4577
WORLAND 9.6 N (COCO) 0.23 IN 0700 AM 08/15 4043
WORLAND 2.3 NE (COCO) 0.20 IN 0700 AM 08/15 4107
TEN SLEEP 0.3 SSW (COCO) 0.20 IN 0700 AM 08/15 4426
WORLAND AIRPORT (ASOS) 0.19 IN 0553 PM 08/15 4226
WORLAND (COOP) 0.09 IN 0700 AM 08/15 4058
WORLAND 8 SW (COCO) 0.08 IN 0700 AM 08/15 4136
TEN SLEEP 5 NNW (COCO) 0.05 IN 0700 AM 08/15 4531
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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Day 3 High Temperature |
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