|The heaviest snow fell in Teton County. The top of the Jackson Hole Ski Resort received 22 inches of new snow.
Every event with a place to put it; 3 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.
Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS RIW wrote it up.
Pacific moisture combined with a jet streak to bring a band of snow to northwestern Wyoming that brought heavy snow to Yellowstone Park and Teton County.|The heaviest snow fell in Teton County. The top of the Jackson Hole Ski Resort received 22 inches of new snow. Amounts in the Jackson Valley generally ranged from 6 to 12 inches. Up to 14 inches of new snow fell in Yellowstone Park.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Riverton, WY wrote its last area forecast discussion before the first event at Mar 4, 10:01 PM MST, 1 hour 59 minutes earlier. Its key messages:
Area Forecast Discussion National Weather Service Riverton WY 1001 PM MST Mon Mar 4 2024 .KEY MESSAGES... - A weather disturbance moving through the region Monday afternoon and evening provides a quick shot of light snow across the northwest-quarter of the state. - Snow rapidly increases across western Wyoming Tuesday morning as another rich plume of moisture moves in from the Pacific Ocean. The heaviest snow falls from 2 PM Tuesday until 2 AM Wednesday. Areas of central Wyoming will see westerly wind gusting 35 to 50 mph Tuesday. - Temperatures remain around or below normal through Friday before warming up for the weekend and early next week. && .DISCUSSION... Issued at 129 PM MST Mon Mar 4 2024 A compact shortwave is making its way through eastern Idaho and western Wyoming early Monday afternoon. Light to moderate snow will continue across the far west mountains and valleys until the back edge of this wave reaches the region between 3 and 5 PM. A jet streak driving this wave east may provide enough dynamic support in combination with 7.5-8C/km lapse rates to generate scattered snow showers east of the Continental Divide late this afternoon. Amounts with these showers would be minimal at best and confidence in formation of these showers is not high. Otherwise, conditions turn drier by mid-evening in the wake of the shortwave. Southwest wind 15 to 30 mph persists overnight across central Wyoming. Attention quickly turns to the next winter storm set to begin impacting the forecast area Tuesday morning as Pacific moisture reaches the western mountains and valleys. The moisture steadily increases through the day with a narrow plume of integrated water vapor transport (IVT) taking aim on western Wyoming by 00Z/Wednesday. The jet lifts north across the forecast area by afternoon placing northwest Wyoming in the favorable right entrance region to aid snowfall production into the evening hours. Snowfall intensity and coverage increases across western Wyoming during the late morning and especially Tuesday afternoon given the favorable dynamics, moisture, and 40kt 700mb west-southwest wind to aid orographics. The IVT plume peaks over the region between about 00Z and 09Z/Wednesday. Low-level specific humidities approach 4g/kg during this time and 700-600mb layer temperatures favor dendritic growth. Overall, these ingredients lead to a better than 80 percent chance of winter storm snowfall totals over the mountains and valleys of Teton County and southwest Yellowstone National Park. Snowfall rates could certainly reach 1 inch per hour between 2 PM Tuesday and 2 AM Wednesday. Winter weather advisories have been added for Star Valley, the nearby Salt River and Wyoming Ranges, west slope Wind River Mountains, and the Absaroka Range. Winds in the mountains will frequently gust 25 to 40 mph. Areas east of the Continental Divide will be dry and seasonal Tuesday ahead of the winter storm where west-southwest flow aloft favors gusty wind in Central Wyoming. Gusts of 35 to around 50 mph occur over much of Natrona County and southeast Fremont County Tuesday and Tuesday evening. A weak surface boundary makes its way into northern portions of the Bighorn Basin and Johnson County Tuesday evening. Northerly surface flow increases behind this feature as moisture streams overhead from the west- southwest. This combination leads to overrunning light snow and accumulations in these areas, especially along the Cody Foothills. There is a better than 70 percent chance that snowfall does not exceed two inches, and will more likely be confined to around one inch or less. This boundary may make its way into the Wind River Basin late, but snow accumulations are not anticipated. Natrona County has a better than 80 percent chance that west-southwest wind keeps this feature from slipping south to Casper. Therefore, warm and breezy conditions are in store for Casper Tuesday night. The western and northern snow decreases in coverage and intensity Wednesday morning as the deepest moisture moves east, the plume shifts slightly south from the highlighted areas, and the jet-level support subsides. Nonetheless, mid-level moisture will continue to generate orographic light snow in westerly flow across the western mountains. Much of the heavier snow associated with the advisories and warnings may end by 12Z if not 15Z/Wednesday, but saw no real reason to cut-back highlights given continuing light snow. Longwave trough from the Northern Plains to the Desert Southwest keeps Wyoming in cooler, cyclonic flow Thursday and Friday. Orographic light snow persists over the northwest Thursday before conditions dry Friday. Warmer temperatures arrive Saturday and Sunday as a transient ridge crosses the state. Moisture does return to the western mountains Sunday on the backside of this ridge. This trend continues for areas along and west of the Continental Divide for Monday, while eastern areas remain dry and breezy with above normal temperatures. && .AVIATION /06Z TAFS THROUGH 06Z WEDNESDAY/... Issued at 1000 PM MST Mon Mar 4 2024 VFR conditions prevail through 12Z Tuesday at all terminals. Breezy winds will persist at KCOD, KCPR, and KRIW with gusts around 20 to occasionally 25 kts possible through much of the night, before diminishing late in the night at KCOD and KRIW, while KCPR will see gusty winds persist through the period. Winds increase at most terminals Tuesday afternoon. The next winter storm pushes into western WY Tuesday morning. Greatest impacts will occur at KJAC, where steady snow is expected. KJAC will see IFR conditions by 14Z to 16Z Tuesday. IFR to LIFR conditions will persist through the rest of the period. There is a 40% chance that conditions will be at or below airport minimums during much of that time, as snow will be moderate to heavy at times Tuesday and into Tuesday night. Snow showers are also possible at KPNA (60% chance) and KBPI (30% chance) Tuesday morning through the early afternoon. KCOD then has increasing chances (up to 60%) of snow showers late in the period as the wave starts to track eastward. Please see the Aviation Weather Center and/or CWSU ZDV and ZLC for the latest information on icing and turbulence forecasts. && .RIW WATCHES/WARNINGS/ADVISORIES... Winter Storm Warning from 5 AM Tuesday to 11 AM MST Wednesday for WYZ001-012-013. Winter Weather Advisory from 5 AM Tuesday to 11 AM MST Wednesday for WYZ002-014-023-024. && DISCUSSION...CNJ AVIATION...Hensley
Hazardous Weather Outlook National Weather Service Riverton WY 204 PM MST Mon Mar 4 2024 WYZ001>020-022>030-051400- Yellowstone National Park-Absaroka Mountains-Cody Foothills- North Bighorn Basin-Southwest Bighorn Basin- Southeast Bighorn Basin-Owl Creek and Bridger Mountains- Bighorn Mountains West-Bighorn Mountains Southeast- Northeast Johnson County-Southeast Johnson County- Teton and Gros Ventre Mountains-Jackson Hole- Wind River Mountains West-Wind River Mountains East- Upper Wind River Basin-Wind River Basin-Lander Foothills- Green Mountains and Rattlesnake Range- Natrona County Lower Elevations-Casper Mountain-Star Valley- Salt River and Wyoming Ranges-Upper Green River Basin Foothills- Upper Green River Basin-South Lincoln County- Rock Springs and Green River-Flaming Gorge-East Sweetwater County- 204 PM MST Mon Mar 4 2024 ...Winter Storm Warnings and Advisories Posted for Much of Northwest Wyoming Tuesday through Wednesday Morning... This Hazardous Weather Outlook is for Western and Central Wyoming. .DAY ONE...This Afternoon and Tonight. Periods of light snow continue across western Wyoming through the afternoon before winding down. Southwest winds gusting 25 to 40 mph across central Wyoming. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Tuesday and Tuesday Night...Moderate to heavy snow falls in the western mountains and valleys, especially during the afternoon through early morning hours. West-southwest wind 25 to 35 mph with gusts around 50 mph for central Wyoming. Wednesday...Snow gradually decreasing in coverage and intensity during the morning hours. West-southwest wind slowly decreasing in central Wyoming through the day. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report snowfall totals to the National Weather Service in Riverton each morning.
The national radar mosaic for the moment the first event began.
3 winter storm. Local standard time, as filed.
Up to 14 inches of new snow fell in Yellowstone Park.
Heavy snow fell in portions of the Tetons. The highest amount was 22 inches at the top of the Jackson Hole Ski Resort.
Amounts of new snow in the Jackson Valley generally ranged from 6 to 12 inches.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2024Every state in 2024This day in weather historyWarnings in Wyoming, March 2024
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 1168066, 1168067, 1168068.