Trained spotter reported their riding lawn mower was knocked over and damaged as a result from the thunderstorm wind gusts.
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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 CYS wrote it up.
Trained spotter reported their riding lawn mower was knocked over and damaged as a result from the thunderstorm wind gusts.
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 Cheyenne, WY wrote its last area forecast discussion before the first event at Aug 5, 4:50 PM MST, 2 hours 5 minutes earlier.
Area Forecast Discussion National Weather Service Cheyenne WY 550 PM MDT Mon Aug 5 2019 .SHORT TERM...(This evening through Wednesday) Issued at 210 PM MDT Mon Aug 5 2019 Forecast concerns in the short term deal with severe weather chances. Currently...Four Corners High still in place over said area this afternoon. 12Z Grand Junction sounding showing PWATS slightly dropping a bit this morning...but still right around an inch. At the surface...cold front that was over northern Wyoming this morning...is now being analyzed from just north of Alliance...to south of Casper to near Cokeville in extreme western Wyoming. Modest low level moisture increases observed behind the front with dewpoints in the upper 50s. South of the front...dewpoints in the mid 40s are common. Latest SPC Mesoanalysis showing surface based CAPES in the mid 2000 J/KG across the Panhandle with 1000/1500 J?KG over southeast Wyoming. Radar starting to show initiating across southern Albany County and extreme southern Laramie Range at 144PM this afternoon. Storm motions have been to the southeast. For this afternoon and tonight...Appears the HRRR simulated radar is handling current storms the best and generally followed its guidance through the period. Storms really begin developing after 22Z and take on a more easterly movement off the Laramie Range. HRRR showing possibility of discrete supercells developing and has one near Cheyenne...with another near Wheatland. NAM MU CAPEs near 2000 J/KG after 21Z on both the NAM and RAP. Better shear today...on the order of 35-45kts should help in severe thunderstorm development. HRRR has been very consistent on developing a possible squall line this evening up near Converse County with line bowing out over Niobrara County and the northern Panhandle late this evening. Would anticipate the evening shift issuing warning through late evening and possibly beyond as the line shifts to the southeast into the central and possibly the southern Panhandle after 08Z. A slightly drier day with less convection expected Tuesday as moisture shifts east into Nebraska. Still may see a couple severe thunderstorms in the Panhandle Tuesday afternoon. SPC's Marginal Risk area looks good for the Panhandle. .LONG TERM...(Wednesday night through Monday) Issued at 210 PM MDT Mon Aug 5 2019 Thursday...Looks like a decent setup for scattered to numerous showers and scattered thunderstorms in the afternoon and evening with adequate low and mid level moisture, upslope low level southeast winds and a shortwave trough aloft passing overhead around peak heating. Temperatures will be cooler than Wednesday with increased cloud cover and a greater coverage of showers and thunderstorms. Friday...With some decrease in low and mid level moisture, will see a general decrease in shower and thunderstorm coverage. Saturday...Ridging develops aloft, though with enough low and mid level moisture, will again see isolated to scattered afternoon and evening shower and thunderstorm coverage. Sunday...Warmer temperatures aloft will help inhibit thunderstorm development, thus the coverage of showers and thunderstorms will be more isolated. Monday...Somewhat drier air moves in at the low and mid levels, making for a mostly dry day with perhaps an isolated thunderstorm or two over and near the southern Laramie Range. && .AVIATION...(For the 18Z TAFS through 18Z Tuesday afternoon) Issued at 542 PM MDT Mon Aug 5 2019 Wyoming TAFS...Thunderstorms in the vicinity to occasional thunderstorms at KCYS from 00Z to 03Z producing wind gusts to 25 knots and MVFR visibilities. KLAR and KRWL will see VFR conditions this evening and overnight with wind gusts to 10 knots until 12Z. Nebraska TAFS...Thunderstorms in the vicinity from 03Z to 05Z in the Panhandle for airport sites. This trend will continue to quiet down in the early night hours. KCDR and KAIA have the chance for winds to die down and fog to develop between 07Z-09Z. Ceilings will lower down accordingly. Expect skies to clear out by daybreak. && .FIRE WEATHER... Issued at 210 PM MDT Mon Aug 5 2019 Minor fire weather concerns for Tuesday as monsoonal moisture shifts east out of Carbon County. Could see afternoon humidity falling to a little below 15 percent across Carbon County Tuesday. Fortunately...winds are expected to be light...so fire weather should be minimal Tuesday. Increasing moisture again Wednesday into the end of the week as chances for wetting rains begin to increase. Widespread showers and thunderstorms likely Thursday. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...None. NE...None. && SHORT TERM...GCC LONG TERM...RUBIN AVIATION...BMW FIRE WEATHER...GCC
Hazardous Weather Outlook National Weather Service Cheyenne WY 400 AM MDT Mon Aug 5 2019 WYZ103>106-109>117-061000- North Laramie Range-Ferris/Seminoe/Shirley Mountains- Shirley Basin-Central Laramie Range and Southwest Platte County- Central Carbon County-North Snowy Range Foothills- Southwest Carbon County-Sierra Madre Range- Upper North Platte River Basin-Snowy Range-Laramie Valley- South Laramie Range-South Laramie Range Foothills- 400 AM MDT Mon Aug 5 2019 This hazardous weather outlook is for portions of south central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT No hazardous weather is expected at this time. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY The probability for widespread hazardous weather is low. .Spotter information statement... Spotter activation will not be needed. NEZ002-003-019>021-054-055-095-096-WYZ101-102-107-108-118-119- 061000- Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne- North Sioux-South Sioux-Converse County Lower Elevations- Niobrara County-East Platte County-Goshen County- Central Laramie County-East Laramie County- 400 AM MDT Mon Aug 5 2019 This hazardous weather outlook is for portions of western Nebraska...east central Wyoming and southeast Wyoming. .DAY ONE...TODAY AND TONIGHT Strong and severe thunderstorms will be possible this afternoon across the High Plains of Wyoming and into the Nebraska Panhandle late afternoon and into the mid to late evening hours. Hail of half inch to half dollar size, localized 50-70 mph winds, frequent lightning, and brief heavy rain will be possible with the more robust storms. Storm activity should end from west to east through the mid to late evening hours tonight. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY General thunderstorm to marginal risk of severe weather possible over the next couple days with localized small hail, 30-50 mph winds, and heavy rainfall the main hazards. .Spotter information statement... Spotter activation may be needed today. Allen
Special Weather Statement
National Weather Service Cheyenne WY
623 PM MDT Mon Aug 5 2019
WYZ114>116-060115-
South Laramie Range WY-Laramie Valley WY-Snowy Range WY-
623 PM MDT Mon Aug 5 2019
...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL ALBANY COUNTY UNTIL
715 PM MDT...
At 623 PM MDT, Doppler radar was tracking a strong thunderstorm near
Lake Hattie Reservoir, or 23 miles west of Laramie, moving southeast
at 25 mph.
Penny size hail and winds in excess of 40 mph will be possible with
this storm.
Locations impacted include...
Albany, Woods Landing-Jelm, Lake Owen Campground, Lake Hattie
Reservoir, Woods Landing, Lake Owen, Hutton Lake and Centennial.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
Persons in campgrounds should consider seeking sturdy shelter until
this storm passes.
&&
LAT...LON 4119 10617 4133 10602 4114 10558 4099 10575
4100 10592
TIME...MOT...LOC 0023Z 307DEG 20KT 4122 10602
TrudelSpecial Weather Statement National Weather Service Cheyenne WY 640 PM MDT Mon Aug 5 2019 WYZ103-106-060130- Central Laramie Range and Southwest Platte County WY- North Laramie Range WY- 640 PM MDT Mon Aug 5 2019 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN ALBANY AND WEST CENTRAL PLATTE COUNTIES UNTIL 730 PM MDT... At 640 PM MDT, Doppler radar was tracking a strong thunderstorm near Garrett, or 29 miles west of Wheatland, moving southeast at 25 mph. Penny size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Garrett. PRECAUTIONARY/PREPAREDNESS ACTIONS... Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. Persons in campgrounds should consider seeking sturdy shelter until this storm passes. && LAT...LON 4205 10568 4219 10553 4203 10507 4176 10535 TIME...MOT...LOC 0040Z 307DEG 20KT 4208 10553 Trudel
Special Weather Statement National Weather Service Cheyenne WY 655 PM MDT Mon Aug 5 2019 WYZ118-060130- Central Laramie County WY- 655 PM MDT Mon Aug 5 2019 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL LARAMIE COUNTY UNTIL 730 PM MDT... At 654 PM MDT, Doppler radar was tracking a strong thunderstorm over Ranchettes, or near Cheyenne, moving southeast at 25 mph. Half inch hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Cheyenne, Hillsdale, Ranchettes, Frontier Park, North Cheyenne, Warren AFB and Fox Farm-College. This includes the following highways... Interstate 25 in Wyoming between mile markers 12 and 15. Interstate 80 in Wyoming between mile markers 364 and 381. PRECAUTIONARY/PREPAREDNESS ACTIONS... Torrential rainfall is also occurring with this storm, and may lead to localized flooding. Do not drive your vehicle through flooded roadways. && LAT...LON 4117 10487 4128 10477 4120 10440 4100 10456 TIME...MOT...LOC 0054Z 294DEG 22KT 4119 10476 Trudel
Special Weather Statement
National Weather Service Cheyenne WY
705 PM MDT Mon Aug 5 2019
WYZ101-060145-
Converse County Lower Elevations WY-
705 PM MDT Mon Aug 5 2019
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN CONVERSE COUNTY
UNTIL 745 PM MDT...
At 704 PM MDT, Doppler radar was tracking a strong thunderstorm 19
miles southeast of Pine Tree Junction, or 23 miles south of Wright,
moving southeast at 25 mph.
Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.
Locations impacted include...
Bill.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 4337 10502 4308 10533 4338 10570 4350 10556
4350 10547
TIME...MOT...LOC 0104Z 309DEG 20KT 4341 10554
TrudelSpecial Weather Statement National Weather Service Cheyenne WY 721 PM MDT Mon Aug 5 2019 WYZ101-103-107-060200- East Platte County WY-Converse County Lower Elevations WY- North Laramie Range WY- 721 PM MDT Mon Aug 5 2019 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN ALBANY... NORTHWESTERN PLATTE AND SOUTHWESTERN CONVERSE COUNTIES UNTIL 800 PM MDT... At 721 PM MDT, Doppler radar was tracking a strong thunderstorm 8 miles south of Laprele Reservoir, or 15 miles southwest of Douglas, moving southeast at 25 mph. Nickel size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Esterbrook Campground, Laprele Reservoir, Esterbrook, Curtis Gulch Campground, Laramie Peak and Harris Park. PRECAUTIONARY/PREPAREDNESS ACTIONS... This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. Persons in campgrounds should consider seeking sturdy shelter until this storm passes. && LAT...LON 4256 10584 4273 10564 4250 10507 4220 10537 TIME...MOT...LOC 0121Z 309DEG 20KT 4259 10559 Trudel
Special Weather Statement National Weather Service Cheyenne WY 742 PM MDT Mon Aug 5 2019 WYZ106>108-117-118-060230- East Platte County WY- Central Laramie Range and Southwest Platte County WY- Goshen County WY-Central Laramie County WY- South Laramie Range Foothills WY- 742 PM MDT Mon Aug 5 2019 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL ALBANY... SOUTHWESTERN GOSHEN...NORTHWESTERN LARAMIE AND SOUTHERN PLATTE COUNTIES UNTIL 830 PM MDT... At 741 PM MDT, Doppler radar was tracking a strong thunderstorm 13 miles north of Iron Mountain, or 24 miles southwest of Wheatland, moving southeast at 40 mph. Penny size hail and wind gusts up to 50 mph will be possible with this storm. This storm will remain over mainly rural areas of east central Albany, southwestern Goshen, northwestern Laramie and southern Platte Counties. This includes Interstate 25 in Wyoming between mile markers 29 and 57. PRECAUTIONARY/PREPAREDNESS ACTIONS... Frequent cloud to ground lightning is occurring with this storm. Lightning can strike 10 miles away from a thunderstorm. Seek a safe shelter inside a building or vehicle. This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. && LAT...LON 4136 10490 4173 10529 4188 10518 4172 10456 TIME...MOT...LOC 0141Z 308DEG 33KT 4174 10516 Trudel
The Cheyenne radar (KCYS), 144 km away, was scanning. The volume nearest the first event began at 01:56 UTC.
1 thunderstorm wind. Local standard time, as filed.
Resident's riding lawn mower was knocked over and damaged as a result from the thunderstorm wind gusts.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2019Every state in 2019This day in weather historyWarnings in Wyoming, August 2019
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: 838957.