High winds occurred across portions of Fremont and Natrona Counties. The highest winds were at the RAWS site at Camp Creek where a maximum wind gust of 89 mph was recorded.
Every event with a place to put it; 2 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.
High winds occurred across portions of Fremont and Natrona Counties. The highest winds were at the RAWS site at Camp Creek where a maximum wind gust of 89 mph was recorded. Along Outer Drive south of Casper a maximum wind gust of 64 mph was measured.
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 Feb 2, 3:26 AM MST, 1 hour 24 minutes earlier.
Area Forecast Discussion National Weather Service Riverton WY 326 AM MST Fri Feb 2 2018 .SHORT TERM...(Today and tonight) Issued at 217 AM MST Fri Feb 2 2018 A shortwave diving down from the northwest is enhancing the lee enhanced clouds over Montana attm. In response to this approaching shortwave, the echoes on the PIH radar are becoming more enhanced as isentropic lift ahead of this feature gets underway. Light snow is currently falling in Jackson. Snowfall in the far west will increase in intensity today and continue through tonight. Expect advisory amounts across the Teton/Gros Ventre Range as well as the Jackson valley today and tonight. Less accumulating snow is expected in the rest of the western mountains as well as over the Big Horn Mtns during this time frame. Saturday will feature occasional light snow or flurries across the far west. Then on Saturday night, the next shortwave in the northwest flow will result in enhanced snowfall once again in the far west with snow continuing on Sunday for several more inches of snow. This shortwave will drive a cold front south, mainly over Johnson County, when snowfall spills over the divide, mainly over the northern half of Wyoming along and north of the Owl Creek Mtns late Saturday night and Sunday morning. There could even be some subzero readings in Johnson County Sunday morning. The Pacific feed will continue in the far west where snow will continue through Sunday. Then the next shortwave follows quickly behind with more enhanced snowfall in the west with snowfall spilling over to areas east of the divide along with another asct cold front spreading colder air once again to mainly our northeast zones Sunday night and Monday. Except for the aforementioned areas progged to get the brunt of the colder air from the two fropas, expect some of the snow to mix with or change to rain from time to time at the lower elevations through Sunday night. We should see some brisk west southwest winds today from RKS to CPR as winds respond to todays shortwave with the MOS guidance insisting on sustained winds between 30 and 35 knots at RKS. We should also witness a relatively short period of strong winds around Clark today from 4 pm this afternoon to midnight tonight as there is a brief mtn wave signature with a brief, but pronounced mtn top inversion. .LONG TERM...(Monday through Friday) Issued at 217 AM MST Fri Feb 2018 Persistent northwest flow will continue through the extended period as strong Hudson Bay low combines with persistent upper ridge extended from the Desert Southwest nwd to Alaska. A fairly potent shortwave is still forecast to dive se in this flow and across us on Monday. This system is currently just east of the dateline out in the Pacific. A period of heavier snow will likely fall in the west as this system moves through with a decent shot of snow across many areas east of the divide, especially along the track of the vort and where the shortwave interacts with associated cold front moving south (associated with another swd moving nrn high plains disturbance). Some strong and gusty west to northwest winds will likely blow across the high country and southwest with this disturbance. Tuesday and Wednesday we see a brisk nw flow continuing with periods of snow for the nrn mountains mainly. Another northern high plains system will push another front swd on Thursday with an increasing chance of snow spreading swd east of the divide, especially nrn and ern sections (per Euro). Snow will persist at times in the nrn mountains during this timeframe with some lighter snow/flurries lingering into Friday. Forecast mainly based off the Euro this evening with limited other data available until recently. GFS and GEM have another stronger system diving se across us Thursday night into Friday which would bring a much better chance of snow across the entire area. The Euro is showing rising heights on Friday. With the persistent nw flow and little overall big picture change, we'll have to watch this closely as pattern is favorable for continued systems diving se across us from time to time through the extended period and beyond. && .AVIATION...(For the 12Z TAFS through 12Z Saturday morning) Issued at 217 AM MST Fri Feb 2 2018 West of the Continental Divide...KJAC, KBPI, KPNA and KRKS VFR conditions are expected at KBPI and KRKS airports through the period. KRKS will see strong wind speeds today and tonight. KPNA will see periods of snow today and tonight with MVFR conditions at times. KJAC airport will see snow today through tonight. MVFR conditions will become prevailing with IFR conditions at times. Snow will occur in the western mountains with MVFR to IFR conditions and frequent mountain obscuration through the period. East of the Continental Divide...KCPR, KCOD, KRIW, KLND, and KWRL VFR conditions are expected through the period. Gusty wind around KCPR today, decreasing after 00Z. Isolated snow showers will be possible in the lower elevations of the north after 05Z Saturday. Snow will develop in the Bighorn mountains toward 06Z Saturday. && .FIRE WEATHER... Issued AT 217 AM MST Fri Feb 2 2018 Persistent northwest flow aloft will likely be in place over the next week or so. Intermittent embedded disturbances in this flow will allow for several periods of light to moderate snow across the western zones and occasional periods of light snow east. Gusty west to southwest winds to return today across the usual areas in response to the approach of the first of the disturbances. These gusty winds will hang around the region through the weekend, often combining with snow...especially west of the Divide. Today, smoke dispersion will be very good. && .RIW WATCHES/WARNINGS/ADVISORIES... Winter Weather Advisory until 5 AM MST Saturday for WYZ012-013. && SHORT TERM...Lipson LONG TERM...Skrbac AVIATION...Ross FIRE WEATHER...Lipson
Hazardous Weather Outlook National Weather Service Riverton WY 243 AM MST Fri Feb 2 2018 WYZ001>020-022>030-031200- 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- 243 AM MST Fri Feb 2 2018 ...Winter Weather Advisory for Far Western Wyoming for today and tonight... This Hazardous Weather Outlook is for Western and Central Wyoming. .DAY ONE...Today and Tonight Significant snowfall expected at times across the west and northwest. Winds of 35 to 45 mph with gusts of 55 to 60 mph are expected late this afternoon and evening in the Cody foothills, primarily around Clark. .DAYS TWO THROUGH SEVEN...Saturday through Thursday Saturday through Sunday...Significant snowfall expected at times across the west and northwest. A cold front will push south, east of the Divide Saturday evening through Sunday morning bringing much colder air and a chance of snowfall, with the coldest air expected in Johnson County. West southwest winds of 20 and 30 mph with gusts 35 to 45 mph are today across Sweetwater, Southeast Fremont, and Natrona counties along with some isolated gusts from 50 to 55 mph. Monday...Another weather system will spread the potential of snow across much of the area. Significant snowfall may fall in the northwest mountains. Tuesday through Wednesday...Periods of snow in the northern mountains. Thursday...Snow in the northern mountains and a chance of snow across the lower elevations east of the divide. .SPOTTER INFORMATION STATEMENT... Spotters are encouraged to report any new snow amounts as well as any wind gusts of 45 mph or greater. Thank you. TEAM RIVERTON
Special Weather Statement National Weather Service Riverton WY 105 AM MST Fri Feb 2 2018 WYZ008-009-022200- Bighorn Mountains West-Bighorn Mountains Southeast- 105 AM MST Fri Feb 2 2018 The first of several periods of accumulating snowfall will begin early this morning. 2 to 6 inches of snowfall are possible across the Northern Big Horn Mountains and 1 to 3 inches across the Southern Big Horn Mountains through tonight. Expect slick and snow covered roads over Powder River and Granite Pass during this period of time. WYZ001-002-014>016-024-022200- Yellowstone National Park-Absaroka Mountains- Wind River Mountains West-Wind River Mountains East- Upper Wind River Basin-Salt River and Wyoming Ranges- Including the cities of Lake, Mammoth, Old Faithful, and Dubois 105 AM MST Fri Feb 2 2018 The first of several periods of accumulating snowfall will begin early this morning. Anywhere from 2 to 6 inches of snowfall is possible across the Mountains of the region through tonight. Higher amounts are expected across the the Tetons where a Winter Weather Advisory is currently in place. Expect slick and snow covered roads over area highways including Togwotee, Teton, and Salt River Pass during this period of time. WYZ023-022200- Star Valley- Including the cities of Afton, Alpine, Star Valley Ranch, and Thayne 105 AM MST Fri Feb 2 2018 The first of several periods of accumulating snowfall will begin early this morning. The Star Valley could see 1 to 3 inches through tonight with the heaviest amounts in the northern part of the valley. Expect slick and snow covered road conditions during this period of time. WYZ019-020-022-028>030-022200- Green Mountains and Rattlesnake Range- Natrona County Lower Elevations-Casper Mountain- Rock Springs and Green River-Flaming Gorge-East Sweetwater County- Including the cities of Jeffrey City, Casper, Rock Springs, Green River, and Wamsutter 105 AM MST Fri Feb 2 2018 A southwest wind between 20 and 30 mph with gusts 35 to 45 mph are expected today across Sweetwater, southeast Fremont, and Natrona counties. A few gusts from 50 to 55 mph could occur in typical windier locations such as along Outer Drive on the south side of Casper. Lightweight and high profile vehicles should be especially cautious if traveling along areas highways today. Occasionally gusty southwest winds will remain around these same locations through the weekend. TEAM RIVERTON
Special Weather Statement National Weather Service Riverton WY 247 AM MST Fri Feb 2 2018 WYZ008-009-022300- Bighorn Mountains West-Bighorn Mountains Southeast- 247 AM MST Fri Feb 2 2018 The first of several periods of accumulating snowfall will begin early this morning. 2 to 6 inches of snowfall are possible across the Northern Big Horn Mountains and 1 to 3 inches across the Southern Big Horn Mountains through tonight. Expect slick and snow covered roads over Powder River and Granite Pass during this period of time. WYZ001-002-014>016-024-022300- Yellowstone National Park-Absaroka Mountains- Wind River Mountains West-Wind River Mountains East- Upper Wind River Basin-Salt River and Wyoming Ranges- Including the cities of Lake, Mammoth, Old Faithful, and Dubois 247 AM MST Fri Feb 2 2018 The first of several periods of accumulating snowfall will begin early this morning. Anywhere from 2 to 6 inches of snowfall is possible across the Mountains of the region through tonight. Higher amounts are expected across the the Tetons where a Winter Weather Advisory is currently in place. Expect slick and snow covered roads over area highways including Togwotee, Teton, and Salt River Pass during this period of time. WYZ023-022300- Star Valley- Including the cities of Afton, Alpine, Star Valley Ranch, and Thayne 247 AM MST Fri Feb 2 2018 The first of several periods of accumulating snowfall will begin early this morning. The Star Valley could see 1 to 3 inches through tonight with the heaviest amounts in the northern part of the valley. Expect slick and snow covered road conditions during this period of time.| WYZ019-020-022-028>030-022300- Green Mountains and Rattlesnake Range- Natrona County Lower Elevations-Casper Mountain- Rock Springs and Green River-Flaming Gorge-East Sweetwater County- Including the cities of Jeffrey City, Casper, Rock Springs, Green River, and Wamsutter 247 AM MST Fri Feb 2 2018 A southwest wind between 20 and 30 mph with gusts 35 to 45 mph are expected today across Sweetwater, southeast Fremont, and Natrona counties. A few gusts from 50 to 55 mph could occur in typical windier locations such as along Outer Drive on the south side of Casper. Lightweight and high profile vehicles should be especially cautious if traveling along areas highways today. Occasionally gusty southwest winds will remain around these same locations through the weekend. WYZ003-022300- Cody Foothills- Including the cities of Cody and Meeteetse 247 AM MST Fri Feb 2 2018 West winds of 35 to 45 mph along with gusts of 55 to 60 mph are expected across the Cody Foothills, especially in the vicinity of Clark, from 4 pm this afternoon until 12 midnight tonight. Lightweight and high profile vehicles should be especially cautious if traveling along areas highways, including Highway 120, late this afternoon and evening.
The national radar mosaic for the moment the first event began.
2 high wind. Local standard time, as filed.
High winds were recorded across the higher elevations. Some maximum wind gusts included 89 mph at Camp Creek and 64 mph at Fales Rock.
The weather station along Wyoming Boulevard on the south side of Casper recorded a maximum wind gust of 64 mph.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2018Every state in 2018This day in weather historyWarnings in Wyoming, February 2018
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: 738578, 738580.