A combination of snowmelt and rain in the mountains brought minor flooding along the Wind River from Crowheart, WY through Riverton, WY. The flooding remained confined to low-lying areas along the river and no damage was reported.
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The episode as NWS RIW wrote it up.
A combination of snowmelt and rain in the mountains brought minor flooding along the Wind River from Crowheart, WY through Riverton, WY. The flooding remained confined to low-lying areas along the river and no damage was reported.
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 Jun 11, 10:50 AM MST, 1 hour 10 minutes earlier.
Area Forecast Discussion National Weather Service Riverton WY 1150 AM MDT Sat Jun 11 2022 .SHORT TERM...(Today through Sunday) Issued at 400 AM MDT Sat Jun 11 2022 This morning lows remain mild with many locations at or above 60 F. This afternoon a subtle shortwave moves over the top of the ridge, which will increase winds and provide thunderstorm chances for extreme northern WY. Some storms may be strong with hail near an inch and heavy rainfall. Most of the CWA will have scattered high clouds today with some lee enhanced clouds, which may limit highs somewhat, but good mixing and very warm 700 mb temps of 15 to 16 C should allow lower elevations to get into the upper 80s F to just above 90 F. A fairly strong pressure gradient with good daytime mixing will set up for the afternoon hours, which will result in a breezy westerly/southwesterly wind across the area. Gusts as high as 45 mph are possible. It's likely a broad outflow boundary will drop down through the Bighorn Basin and Johnson County into Natrona county this afternoon as convection to north moves southeast through southern MT. This will drop temps slightly, but more importantly will increase sfc dew points, which will prime these areas for convection Sunday afternoon. Fire weather concerns will be elevated across southern WY due to RH in the teens and sustained winds of 25 to 30 mph with gusts up to 50 mph. Isolated to scattered showers and possibly a thunderstorm hang around extreme northern WY tonight. As the next trough approaches on Sunday showers and thunderstorms become likely in northwestern portions of the Cowboy State. Chances increase Sunday morning and through the rest of the day. The SPC has a marginal risk area for severe wind and hail from the Jackson area up into Yellowstone and east across the Bighorn Basin into Johnson County. Storms will form in northwestern WY and ride eastward with the steering flow. Shear appears very favorable for stronger storms, but instability is the question mark. As mentioned earlier sfc dew points should be decent, in the low 50s F, for much of northern WY, so instability will exist, but with warm temps aloft it will limit how much. Discrete cells are logical given modest forcing and good shear. Hail will be the biggest threat given steep mid-level lapse rates and good shear supportive of long lasting updrafts. For southern WY, RH and winds support elevated fire weather conditions once again Sunday afternoon/evening. .LONG TERM...(Sunday night through Friday) Issued at 400 AM MDT Sat Jun 11 2022 The best chance of showers and thunderstorms will be in the northwest and north Sunday night. The cold front gets closer and the upper jet support is there. Dry weather elsewhere Sunday night. On Monday, the cold front and trough moves into the region. The west will see showers and a few storms Monday with the activity moving into the central and east zones Monday afternoon and evening. Upper jet support occurs over the area which should aid in convection. A few storms could get strong in the east zones. Windy most places Monday and cooler. High temps will be in the 40s and 50s in the west, upper 60s and 70s in the central and east zones. A few spots may reach 80 in the east zones prior to the frontal passage later in the afternoon. Showers and isolated storms will be decreasing Monday night with lingering showers over the area late Monday night. The coldest day will be Tuesday with the trough over the region. The models keep a chance of showers and isolated storms over the north with lesser activity over the central and south. Breezy over most areas. Highs will be in the 40s and 50s in the west with upper 50s to mid 60s east of the divide. Wednesday through Friday will see dry weather with warmer temperatures. Isolated showers or storms are possible in the west late in the day Friday. Wednesday will see highs in the 60s and 70s. Thursday will have highs in the 70s and 80s. Friday will see mid 80s to mid 90s. && .AVIATION...(For the 18Z TAFS through 18Z Sunday afternoon) Issued at 1143 AM MDT Sat Jun 11 2022 Cloud cover continues to bubble up across NW WY early this afternoon, with light showers drifting to the northeast. Shower activity is expected to be light, with minimal impacts on local airports. Central and southern WY will remain VFR through the day, with minimal cloud cover. Gusty winds will return to the region this afternoon, with frequent gusts near 30kts at most locations. Gustier winds will be noted just off the sfc. Winds will decrease overnight, before returning around 18Z Sunday, again near 30kts at times. Another round of thunderstorms is expected for northern WY Sunday, and may be a little more numerous. && .FIRE WEATHER... Issued AT 400 AM MDT Sat Jun 11 2022 Southern zones continue to experience elevated fire weather conditions through the weekend. Isolated showers and thunderstorms are possible this afternoon/evening in northern portions of zones 140, 275, 276, 281, and 286. Other areas remain dry today into tonight. RH drops into the low teens this afternoon with sustained winds of 25 to 30 mph in zones 279 and 289. Zones 277, 278, 280, and 283 will have RH drop into the middle teens this afternoon/evening with sustained winds of 20 to 25 mph. Very similar conditions will occur on Sunday. A strong cold front with showers and thunderstorms and a major cooldown is on the way for early next week. && .RIW WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM...Rowe LONG TERM...AR AVIATION...Straub FIRE WEATHER...Rowe
Hazardous Weather Outlook National Weather Service Riverton WY 334 AM MDT Sat Jun 11 2022 WYZ001>020-022>030-121100- 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- 334 AM MDT Sat Jun 11 2022 This Hazardous Weather Outlook is for Western and Central Wyoming. .DAY ONE...Today and Tonight. Very warm to hot, with breezy conditions this afternoon into early evening. This will create elevated fire weather conditions. A chance of thunderstorms over the northwest and north this afternoon and evening. Some storms may be strong with small hail and heavy rain. .DAYS TWO THROUGH SEVEN...Sunday through Friday. Sunday...Very warm to hot, with breezy to windy conditions in the afternoon into early evening. This will create elevated fire weather conditions once again. A chance of thunderstorms over the northwest and north Sunday afternoon. Sunday through Monday...Snowmelt will continue Sunday into Monday morning at the higher elevations. Rivers and streams will continue to have high water levels Sunday into Monday. Bankfull conditions are expected at some locations. Exercise caution if recreating near any waterways, as fast flowing currents will be observed. Monday and Tuesday...Breezy to windy with a chance of thunderstorms both days. Much cooler temperatures. .SPOTTER INFORMATION STATEMENT... Weather spotters are encouraged to report significant weather conditions, according to standard operating procedures.
The national radar mosaic for the moment the first event began.
3 flood. Local standard time, as filed.
The river gage at Crowheart, WY along the Wind River peaked near 11 feet. The flooding remained in low-lying areas and caused no known damage.
The Wind River near Kinnear, WY peaked around 9 feet. The flooding was confined to low lying areas around the river and caused no known damage.
The Wind River at Riverton, WY peaked around 10 feet. The flood remained over low-lying areas near the river and caused no known damage.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2022Every state in 2022This day in weather historyWarnings in Wyoming, June 2022
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: 1036778, 1036781, 1036783.