A shortwave moved across Wyoming and brought high wind to portions of central Wyoming, The strongest wind occurred at Red Canyon where wind gusts to 76 mph were reported. In the lower elevations, wind gusts over 58 mph were reported in and around Casper, as well as in southern Johnson Counties.
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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.
A shortwave moved across Wyoming and brought high wind to portions of central Wyoming, The strongest wind occurred at Red Canyon where wind gusts to 76 mph were reported. In the lower elevations, wind gusts over 58 mph were reported in and around Casper, as well as in southern Johnson Counties.
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 Nov 4, 11:29 PM MST, 31 minutes earlier.
Area Forecast Discussion National Weather Service Riverton WY 1229 AM MDT Sun Nov 5 2023 .DISCUSSION...(Today through Saturday) Issued at 1213 AM MDT Sun Nov 5 2023 IR depicts the next upper level disturbance across the Pacific Northwest with cooling cloud tops as it deepens with its movement eastward. The induced ridging for today is pushing to the east of the CWA as increasing clouds spill in from the west. Lower valley rain and mountain snow will begin to creep in from Idaho early this Sunday morning. Light in nature, little rain accumulations with an inch or two expected above the 8-9kft range. Probabilistic models continue to show this to be the best range of accumulations moving forward with each shortwave from the aforementioned longwave trough. Thus, any winter headlines are not expected at this time with the accumulations happening over the course of the next couple of days into mid week Wednesday morning with this overall longwave pattern. With ample PFJ support, expect clouds to continue through this time period but with little to no chances for precipiation on the leeward side east of the Divide. For Sunday, expect a weak cold front to slowly drop southward throughout the afternoon. As a result, the gradient will tighten to about 7-9 mb across the CWA giving way to 25-35mph gusts east of the Divide from the west to southwest. Higher speeds expected for higher elevations. With the downslope nature of the winds and suppresional heating ahead of the aforementioned weak cold front, expect Sunday afternoon to be the warmest day looking ahead throughout the long term period with widespread 50s to even low to mid 60s east of the Divide. Cooler, of course, to the west, where the precipiation cooled air will keep temperatures back to near average. Heading into Monday through Wednesday, expect slightly cooler but still above average temperatures behind the cold front. Winds will be weaker as it moves south to southeastward with a more relaxed gradient overnight SUnday into Monday morning. Continued shortwaves each afternoon and evening for points west of the Divide with another inch or two of snow Monday and Tuesday respectively with possible localized higher amounts higher in elevation above treeline. The main trough will exit eastward as it fills with increasing convergence behind it building a ridge in from the California coastline. Late Tuesday will see the main cold front push through as well that will drop temperatures back to near average for this time of year for the remainder of the week and into the weekend. During this mid to end of work week timeframe, a deepening low over the GOA looks to split with another low pushing towards the Pacific Northwest. The EC solution in the long term has it nearing from the west to the CWA by late Friday and into early Saturday morning that looks to bring the next best chance for even more widespread precipiation to include points east of the Divide. Stay tuned for updated forecasts in the coming days, but this shows a stronger signal for higher impacts to the CWA in terms of winter weather and continued cooler temperatures. && .AVIATION...(For the 06Z TAFS through 06Z Sunday night) Issued at 1058 PM MDT Sat Nov 4 2023 West of the Divide...KBPI/KJAC/KPNA/KRKS Terminals. A couple of shortwaves moving into Wyoming will keep conditions unsettled through the TAF period. Impacts are most likely at KJAC, which will see persistent rain and snow chances through Sunday. MVFR to IFR conditions are possible there, especially in the 12-17Z timeframe. Less confidence exists for prevailing precipitation impacts at KBPI and KPNA, so will keep VCSH there for now. Otherwise, winds will increase late Sunday morning, remaining gusty through around 00Z Monday. East of the Divide...KCOD/KCPR/KLND/KRIW/KWRL Terminals. VFR conditions should prevail at terminals east of the Divide. KCOD could see showers in the vicinity, but otherwise the main impact from the shortwaves arriving will be mid/high cloud decks as well as gusty winds. Winds will first increase at KCOD and KCPR around/after 12Z, then elsewhere through late Sunday morning. Widespread wind gusts of 25 to 30 knots are likely through sunset. 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... NONE. && DISCUSSION...Lowe AVIATION...Myers
Hazardous Weather Outlook National Weather Service Riverton WY 1234 AM MDT Sun Nov 5 2023 WYZ001>020-022>030-061045- 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- 1234 AM MDT Sun Nov 5 2023 This Hazardous Weather Outlook is for Western and Central Wyoming. .DAY ONE...Today and Tonight. Valley rain and mountain snow expected west of the Divide starting Sunday morning and throughout the day. 1 to 3 inches are possible above the 8-9kft range. Expect gusty west to southwest winds for points to the east pushing as high as 25-35 mph. Higher wind speeds for localized areas higher in elevation as well before diminishing into the overnight hours into Monday morning. .DAYS TWO THROUGH SEVEN...Monday through Saturday. Additional chances for valley rain and mountain snow Monday and Tuesday afternoons and evenings with 1 to 3 inches possible of snow above the 8-9kft elevation range. Cooler temperatures beyond Wednesday with the next chance for even more widespread winter weather coming next weekend, to possibly include points east of the Divide. .SPOTTER INFORMATION STATEMENT... Spotter activation will likely be needed.
The national radar mosaic for the moment the first event began.
4 high wind. Local standard time, as filed.
Wind gusted as high as 68 mph along Scenic Drive on the south side of Casper.
The wind sensor along Highway 28 through South Pass reported a maximum wind gust of 76 mph.
Wind gusts as high as 61 mph were recorded along Interstate 25 to the north of Kaycee.
Wind gusts to 59 mph were reported along Highway 220 near the Pathfinder Reservoir.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2023Every state in 2023This day in weather historyWarnings in Wyoming, November 2023
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: 1143126, 1143120, 1143122, 1143127.