Another fast moving trough mixed strong mid level winds to the surface and brought another bout of high wind to the Cody Foothills. The strongest winds gust recorded was 83 mph at a weather sensor 5 miles west-northwest of Clark.
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The episode as NWS RIW wrote it up.
Another fast moving trough mixed strong mid level winds to the surface and brought another bout of high wind to the Cody Foothills. The strongest winds gust recorded was 83 mph at a weather sensor 5 miles west-northwest of Clark.
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 2, 10:15 PM MST, 1 hour 30 minutes earlier.
Area Forecast Discussion National Weather Service Riverton WY 1015 PM MST Thu Mar 2 2017 .SHORT TERM...Tonight through Sunday Synopsis...Northwest flow aloft will continue tonight, before a flat ridge transitions over the area. The flow will turn more southwesterly by Saturday, as the ridge shifts eastward and a longwave trough digs southward toward the Pacific Northwest. A strong PFJ will move over the state Saturday afternoon and continue into Sunday. Strong winds will continue along the leeside of the mountains tonight into Friday, especially the Absarokas and Wind River Mountains. Have upgraded the High Wind Watch to a Warning for tonight into late Friday morning. Windy conditions will also continue across the Wind Corridor through the forecast period. Forecasted winds for Sunday may not be high enough for this wind prone area, given the strength and location of the jet. 700mb winds/temps also seem to be on the light/cold side east of the Divide. Scenario could be shaping up like early February, with rapid snow melt in the Wind River Basin. However, this would include Natrona County this time. Although snow depth over the county is lower than in Fremont, mainly due to the blowing and drifting that has occurred over the last week. Conditions will be mainly dry tonight through Saturday morning, with very isolated snow possible over the northwest. By Saturday morning, snow will quickly develop over northwest portions. This will continue through the overnight hours into Sunday, as snow spreads southward. This precipitation is expected to stay confined west of the Divide through the day Sunday. Snowfall amounts are expected to remain light, with 3 to 6 inches in the mountains and 1 to 3 inches possible in the western valleys. .LONG TERM...Sunday night through Thursday Synopsis...The strong Pacific cold front is progged by the models to move east into western Wyoming by late Sunday afternoon/early Sunday evening and across central Wyoming Sunday evening. Windy and mild conditions will precede the cold front across central and southern areas Sunday while the west will see snow increasing in coverage and intensity along the cold front Sunday afternoon and evening. We can still expect some Isolated to scattered snow showers spreading eastward of the Continental Divide Sunday night. Cold advection will spread southeast into the region on Monday with cooler conditions expected with mainly mountain snow showers. By mid week, a westerly flow will bring milder weather across the area from Wednesday into Thursday. There will be the possibility again of snow showers across the western mountains and far west valleys, with windy areas expected from the Interstate 80 corridor through Casper. Discussion...The ECMWF and Canadian models remain quicker and less amplified than GFS moving the trough across the Rockies Sunday night and Monday, though surface features are similar with low over SW North Dakota 06z Monday with cold front near the eastern Wyoming border. Will continue to stress that the main concern for Sunday will be the high wind threat across southern and central Wyoming with deep southwest flow, H7 winds 50-60 knots ahead of the front Sunday afternoon. Cold front will bring a quick but possibly significant shot of snow, blowing and drifting snow, to areas mainly west of the divide Sunday afternoon through Sunday night, with snow expected to taper off Monday morning. Forecast reflects the faster ECMWF and Canadian on Monday, which are quicker to dry things out the central and south, with PoPs confined to the west. Further into the extended forecast by the middle of next week, the models are in favor of moving the upper high further southward over the western Aleutians. This will result in a more zonal flow and a flatter ridge southeast across the western U.S. Am leaning more toward the ECMWF/Canadian with drier and milder westerly flow prevailing across most of the area Wednesday and Thursday except for some orographic light snow in the west sections. && .AVIATION.../06Z ISSUANCE/ The main aviation concern will be windy west to southwest wind and/or marginal low-level wind shear on lee side of mountain ranges, adjacent foothills and across the central wind corridor from South Pass to Casper. Otherwise, VFR conditions with variable mid-high level cloudiness. && .FIRE WEATHER... A slow warming trend will continue across the area as a weak area of high pressure moves into the area. Any snow showers over northwest portions are expected to be light, with little or no accumulation. Gusty winds will continue over the east slopes of the mountains, as well as across the Wind Corridor, tonight and last through the weekend. Mixing and smoke dispersal will be generally fair to poor in the valleys and basins. Through this period, areas east of the divide will remain dry and mild. Chances for snow will increase across the northwest by Saturday, spreading southward across the rest of the area west of the Divide by Sunday. && .RIW WATCHES/WARNINGS/ADVISORIES... High Wind Warning from midnight tonight to noon MST Friday for WYZ002-003. && SHORT TERM...LaVoie LONG TERM...Troutman AVIATION...WM FIRE WEATHER...LaVoie
Hazardous Weather Outlook National Weather Service Riverton WY 244 PM MST Thu Mar 2 2017 WYZ001>020-022>030-032145- Yellowstone National Park-Absaroka Mountains-Cody Foothills- North Big Horn Basin-Southwest Big Horn Basin- Southeast Big Horn 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- 244 PM MST Thu Mar 2 2017 ...High Wind Warning for the Absarokas and Cody Foothills late tonight and tomorrow morning... This Hazardous Weather Outlook is for Western and Central Wyoming. .DAY ONE...Today and Tonight High winds are possible in the Absaroka Range and Cody Foothills late tonight. Please see High Wind Warning for more information. .DAYS TWO THROUGH SEVEN...Friday through Wednesday Saturday...Strong winds are possible from southeast Fremont County through the Casper area. Sunday and Monday...A strong cold front will move across the area Sunday night. High winds are possible ahead of and with the frontal passage across much of central and southern Wyoming Sunday into Monday. Snow, blowing and drifting snow, will likely accompany the cold front across the west Sunday and Monday with the most significant impacts expected Sunday afternoon and Sunday night. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be needed today and tonight.
The national radar mosaic for the moment the first event began.
1 high wind. Local standard time, as filed.
The three wind sensors around Clark all recorded wind gusts past 58 mph. The strongest gust was 83 mph at the sensor 5 miles west-northwest of Clark.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2017Every state in 2017This day in weather historyWarnings in Wyoming, March 2017
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: 680039.