Severe thunderstorms moved over the southern Laramie Range producing wind gusts in excess of 50 knots while another storm produced nickel size hail in Platte County.
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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.
Severe thunderstorms moved over the southern Laramie Range producing wind gusts in excess of 50 knots while another storm produced nickel size hail in Platte County.
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 16, 2:29 PM MST, 31 minutes earlier.
Area Forecast Discussion
National Weather Service Cheyenne WY
329 PM MDT Fri Aug 16 2019
.UPDATE...
Issued at 324 PM MDT Fri Aug 16 2019
...SEVERE THUNDERSTORM WATCH IN EFFECT TILL 10 PM MDT...
A severe thunderstorm watch has been issued for Goshen, Laramie,
and Platte Counties in Wyoming and for Banner, Box Butte,
Cheyenne, Kimball, Morrill, Scotts Bluff, and Sioux Counties in
Nebraska.
&&
.SHORT TERM...(This evening through Sunday)
Issued at 226 PM MDT Fri Aug 16 2019
Looks like one more round of storms late this afternoon into this
evening with some strong to severe storms expected as well. Most
likely areas for severe storms appears to be from extreme se Wy
across the southern Neb Panhandle where better instability should
exist. Does appear storms will exit the CWA by late this evening
leaving quiet conditions for the rest of the night.
A drying pattern should begin over the CWA on Saturday as more
westerly flow sets up over the area. Could be a few storms once
again over the plains but instability should be less so severe
threat more marginal. Quiet again Saturday night then even drier
air spreads in Sunday boding for a dry and very warm day.
.LONG TERM...(Sunday night through Friday)
Issued at 226 PM MDT Fri Aug 16 2019
An upper high will build a bit over the Co/NM border area early
next week keeping very warm and dry conditions in place Monday.
Chances for convection begin a return Tuesday as moisture begins
to increase from the south. Could see a backdoor cool front move
into the area later Tuesday through Weds which may increase
convection before a drier regime return for late in the week.
&&
.AVIATION...(For the 18Z TAFS through 18Z Saturday afternoon)
Issued at 1142 AM MDT Fri Aug 16 2019
Another round of afternoon and evening thunderstorms expected
today. Storms may be a little further south today...impacting the
I-80 corridor from KSNY to KLAR. Latest HRRR showing IFR/LIFR
conditions returning to the southern Panhandle over to KCYS
tonight. Some questions on this happening as LAMP winds showing a
west/downsloping component. But for now...will go with persistence
and keep the lower conditions in the TAFS for KSNY/KBFF and KCYS.
&&
.FIRE WEATHER...
Issued at 226 PM MDT Fri Aug 16 2019
Near critical to critical conditions will continue to occur over
far western areas in the afternoons and early evenings through
Sunday with dry air and gusty winds expected. Lighter winds are
expected east of the mountains. There will be isolated showers and
storms into this evening and possibly again Saturday afternoon
then mainly dry and very warm conditions are expected Sunday into
early next week.
&&
.CYS WATCHES/WARNINGS/ADVISORIES...
WY...Red Flag Warning until 8 PM MDT this evening for WYZ304.
Fire Weather Watch from Saturday afternoon through Saturday
evening for WYZ304.
Fire Weather Watch from Sunday afternoon through Sunday evening
for WYZ304.
NE...None.
&&
UPDATE...WM
SHORT TERM...RE
LONG TERM...RE
AVIATION...GCC
FIRE WEATHER...REHazardous Weather Outlook National Weather Service Cheyenne WY 319 PM MDT Fri Aug 16 2019 NEZ002-003-019>021-054-055-095-096-WYZ106>108-117>119-172130- Dawes-Box Butte-Scotts Bluff-Banner-Morrill-Kimball-Cheyenne- North Sioux-South Sioux- Central Laramie Range and Southwest Platte County- East Platte County-Goshen County-South Laramie Range Foothills- Central Laramie County-East Laramie County- 319 PM MDT Fri Aug 16 2019 This hazardous weather outlook is for portions of western Nebraska and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT A Severe Thunderstorm Watch is in effect until 10 PM, except for Dawes County. Expect isolated to scattered thunderstorms through this evening, with some severe thunderstorms possible. The main threats will be large hail and strong winds. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY Afternoon and evening thunderstorms continue into Saturday, with the best possibility of severe thunderstorms generally across the Nebraska Panhandle. Dry and breezy conditions set in Sunday. .Spotter information statement... Spotter activation may be needed. WYZ101>105-109>116-172130- Converse County Lower Elevations-Niobrara County- North Laramie Range-Ferris/Seminoe/Shirley Mountains- Shirley Basin-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- 319 PM MDT Fri Aug 16 2019 This hazardous weather outlook is for portions of east central Wyoming...south central Wyoming and southeast Wyoming. .DAY ONE...THIS AFTERNOON AND TONIGHT Isolated thunderstorms are possible this afternoon and evening. Dry and windy conditions are expected across Carbon County with a Red Flag Warning in place for the far southwestern portion of Carbon County until 8 PM. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY Dry and windy conditions persist into the weekend and for the beginning part of the week. Fire Weather Watches are in place for far southwest Carbon County both Saturday and Sunday. .Spotter information statement... Spotter activation will not be needed. Rubin
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
1139 AM MDT FRI AUG 16 2019
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0154 AM TSTM WND GST ALLIANCE 42.10N 102.87W
08/16/2019 E70 MPH BOX BUTTE NE TRAINED SPOTTER
PEA SIZED HAIL.
&&
RCOXSpecial Weather Statement National Weather Service Cheyenne WY 256 PM MDT Fri Aug 16 2019 NEZ020-054-WYZ119-162145- Kimball NE-Banner NE-East Laramie County WY- 256 PM MDT Fri Aug 16 2019 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN KIMBALL... SOUTHWESTERN BANNER AND EAST CENTRAL LARAMIE COUNTIES UNTIL 345 PM MDT... At 256 PM MDT, Doppler radar was tracking a strong thunderstorm near Albin, or 23 miles northwest of Kimball, moving east at 35 mph. Nickel size hail and winds in excess of 30 mph will be possible with this storm. Locations impacted include... Albin. 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. && A Severe Thunderstorm Watch remains in effect until 1000 PM MDT for the Panhandle of Nebraska...and southeastern Wyoming. LAT...LON 4131 10418 4142 10419 4152 10361 4129 10358 TIME...MOT...LOC 2056Z 265DEG 29KT 4136 10407 Worley
Special Weather Statement National Weather Service Cheyenne WY 344 PM MDT Fri Aug 16 2019 NEZ054-162230- Kimball NE- 344 PM MDT Fri Aug 16 2019 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN KIMBALL COUNTY UNTIL 430 PM MDT... At 344 PM MDT, Doppler radar was tracking a strong thunderstorm near Oliver Campground, or 9 miles northwest of Kimball, moving east at 30 mph. Nickel size hail and winds in excess of 40 mph will be possible with this storm. Locations impacted include... Kimball, Dix, Oliver Campground, Oliver Reservoir, Kimball Airport and Bushnell. This includes Interstate 80 in Nebraska between mile markers 16 and 32. 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. && A Severe Thunderstorm Watch remains in effect until 1000 PM MDT for the Panhandle of Nebraska. LAT...LON 4121 10395 4133 10393 4138 10340 4117 10344 TIME...MOT...LOC 2144Z 274DEG 25KT 4129 10383 Worley
The Cheyenne radar (KCYS), 45 km away, was scanning. The volume nearest the first event began at 22:00 UTC.
4 thunderstorm wind, 1 hail. Local standard time, as filed.
Winds measured at the Lone Tree Wyoming Department of Transportation mesonet.
Winds were measured using a vantage 2 pro Davis weather sensor with sighting 30 feet above ground.
Winds measured at station WY37 located one mile east-southeast of Buford.
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: 839049, 839052, 839053, 839054, 839055.