Afternoon and early evening thunderstorms produced strong winds, funnel cloud, weak tornado, and numerous reports of large hail across portions of east central and southeast Wyoming.
Every event with a place to put it. 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 CYS wrote it up.
Afternoon and early evening thunderstorms produced strong winds, funnel cloud, weak tornado, and numerous reports of large hail across portions of east central and southeast Wyoming.
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 Jun 16, 12:01 PM MST, 2 hours 2 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 101 PM MDT TUE JUN 16 2015 .SHORT TERM...(TODAY THROUGH THURSDAY) ISSUED AT 330 AM MDT TUE JUN 16 2015 TODAY...WEBCAMS SHOW AREAS OF FOG...LIKELY DENSE...HAVE FORMED OVER THE SUMMIT OF INTERSTATE 80 BETWEEN LARAMIE AND CHEYENNE. DECENT SOUTH WINDS AND MIXING HAVE LIMITED FOG DEVELOPMENT EAST OF INTERSTATE 25 THUS FAR. HOWEVER...WITH TEMPERATURE AND DEWPOINT SPREADS NARROWING AND CLEARING SKIES NOTED ON SATELLITE IMAGERY...WILL PAINT AREAS OF FOG EAST OF INTERSTATE 25 THROUGH THE MID MORNING HOURS. BRISK WEST NORTHWEST FLOW ALOFT CONTINUES THIS AFTERNOON WITH A NICE LOW LEVEL CONVERGENCE BOUNDARY SETTING UP THIS AFTERNOON FROM RAWLINS TO SCOTTSBLUFF ALONG WITH IMPRESSIVE LOW AND MID LEVEL THETA- E RIDGE AXIS. PER THE STORM PREDICTION CENTER DAY ONE OUTLOOK...DECENT SHEAR AND INSTABILITY PROGGED FOR A SLIGHT RISK OF SEVERE STORMS...THUS HAVE PAINTED ISOLATED SEVERE STORMS THIS AFTERNOON AND EVENING WITH LARGE HAIL AND DAMAGING WINDS. TONIGHT...AREAL COVERAGE OF STORMS WILL DECREASE WITH LOSS OF DAYTIME HEATING AND WITH THE PASSING OF THE SHORTWAVE TROUGH ALOFT. BOUNDARY LAYER PROGS SUGGEST AREAS OF FOG DEVELOPING AGAIN LATE TONIGHT EAST OF INTERSTATE 25. WEDNESDAY...CONVECTIVE INITIATION DEVELOPS AGAIN IN THE AFTERNOON ALONG AND EAST OF INTERSTATE 25 WHERE A DECENT LOW AND MID LEVEL THETA-E RIDGE AXIS DEVELOPS...AND WHERE ANOTHER LOW LEVEL CONVERGENCE AXIS DEVELOPS AS ANOTHER WEAK SHORTWAVE TROUGH ALOFT PASSAGE OCCURS NEAR PEAK HEATING. A FEW OF THESE STORMS AGAIN MAY BE STRONG TO SEVERE BASED ON INSTABILITY AND SHEAR PROFILES. WEDNESDAY NIGHT...CORRESPONDING DECREASE IN AREAL SHOWER AND THUNDERSTORM COVERAGE WITH LOSS OF DAYTIME HEATING. THURSDAY...DESPITE WEAK RIDGING ALOFT DEVELOPING...LOW LEVEL UPSLOPE WINDS WILL ADVECT LOW LEVEL MOISTURE WESTWARD AND WILL LIKELY SPAWN ISOLATED TO WIDELY SCATTERED AFTERNOON THUNDERSTORMS ALONG AND EAST OF INTERSTATE 25 WHERE CONVECTIVE INHIBITION WILL BE MINIMIZED. MOST LIKELY AREAS FOR CONVECTIVE INITIATION WILL BE NORTH OF A RAWLINS TO SCOTTSBLUFF LINE WHERE CONVECTIVE INHIBITION WILL BE MOST LIMITED. .LONG TERM...(THURSDAY NIGHT THROUGH MONDAY) ISSUED AT 330 AM MDT TUE JUN 16 2015 UPPER LEVEL RIDGING BUILDS INTO THE AREA THURSDAY NIGHT FOR A BRIEF DRY SPELL THURSDAY NIGHT INTO FRIDAY. WARM 700MB TEMPERATURES OF +16C SHOULD TRANSLATE TO LOW TO MID 90S IN THE PANHANDLE AND MID TO UPPER 80S IN SOUTHEAST WYOMING. RIDGE GETS FLATTENED SOME FRIDAY NIGHT INTO SATURDAY AS YET ANOTHER SHORTWAVE MOVES THROUGH NORTHERN WYOMING. ASSOCIATED SURFACE FRONT CLIPS OUR NORTHEASTERN ZONES FOR AT LEAST A SMALL CHANCE FOR SHOWERS AND THUNDERSTORMS EAST OF THE LARAMIE RANGE SATURDAY AFTERNOON AND EVENING. DRY WEATHER RETURNS FROM SUNDAY ON INTO NEXT WEEK AS UPPER RIDGE BUILDS BACK INTO THE AREA. && .AVIATION...(FOR THE 18Z TAFS THROUGH 18Z WEDNESDAY AFTERNOON) ISSUED AT 1230 PM MDT TUE JUN 16 2015 MAIN CONCERN FOR THIS TAF CYCLE WILL BE ANTICIPATED AFTERNOON AND EARLY EVENING THUNDERSTORMS THAT ARE EXPECTED TO IMPACT MOST OF THE TERMINALS ACROSS SOUTHEAST WYOMING AND THE WESTERN NEBRASKA PANHANDLE. THUNDERSTORMS HAVE YET TO DEVELOP ACROSS THE AREA...BUT EXPECT THEM TO DO SO BY AROUND 20Z. HAVE MAINTAINED INHERITED THUNDERSTORM TEMPO GROUPS AT MOST SITES WITH THE EXCEPTION OF KRWL AS CONFIDENCE IS HIGH ENOUGH IN THE COVERAGE TO WARRANT IT. SOME OF THIS ACTIVITY HAS THE POTENTIAL TO PRODUCE HAIL AND DAMAGING WINDS. THUNDERSTORMS WILL DISSIPATE BY AROUND SUNSET...WITH IFR/MVFR CIGS/VSBYS IN FOG/STRATUS AGAIN WEDNESDAY MORNING FOR ALL SE WYOMING/W NEBRASKA TERMINALS WITH THE EXCEPTION OF KRWL. && .FIRE WEATHER... ISSUED AT 140 AM MDT TUE JUN 16 2015 MINIMAL CONCERNS DUE TO RECENT RAINS AND GREEN UP...THOUGH HUMIDITIES WILL CONTINUE TO SLOWLY FALL EACH DAY...ESPECIALLY WEST OF INTERSTATE 25 AND AS WE APPROACH THE WEEKEND. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...NONE. NE...NONE. && SHORT TERM...RUBIN LONG TERM...GCC AVIATION...CAH FIRE WEATHER...RUBIN
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 1202 PM MDT TUE JUN 16 2015 NEZ002-003-019>021-054-055-095-096-WYZ101-102-107-108-118-119- 171815- 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- 1202 PM MDT TUE JUN 16 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WESTERN NEBRASKA...EAST CENTRAL WYOMING AND SOUTHEAST WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED THUNDERSTORMS WILL DEVELOP OVER PARTS OF SOUTH CENTRAL AND SOUTHEAST WYOMING EARLY THIS AFTERNOON...AND MOVE EAST INTO THE WESTERN NEBRASKA PANHANDLE THIS EVENING. A FEW THUNDERSTORMS WILL BE SEVERE...WITH LARGE HAIL AND DAMAGING WINDS THE PRIMARY THREATS. A FEW TORNADOES ARE ALSO POSSIBLE...ESPECIALLY IN THE WESTERN NEBRASKA PANHANDLE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY DAILY CHANCES FOR SHOWERS AND THUNDERSTORMS WILL EXIST THROUGH SATURDAY. A FEW MAY BE STRONG TO SEVERE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED ALONG AND EAST OF THE LARAMIE RANGE THIS AFTERNOON AND EVENING. WYZ103>106-109>117-171815- 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- 1202 PM MDT TUE JUN 16 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF EAST CENTRAL WYOMING...SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED THUNDERSTORMS WILL DEVELOP AND MOVE EAST ACROSS SOUTH CENTRAL WYOMING THIS AFTERNOON. A FEW STORMS COULD BE STRONG TO SEVERE...WITH HAIL AND GUSTY WINDS THE PRIMARY HAZARDS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY DAILY CHANCES FOR SHOWERS AND THUNDERSTORMS WILL CONTINUE THROUGH SATURDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON. HAMMER
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 128 PM MDT TUE JUN 16 2015 WYZ101-107-162015- EAST PLATTE COUNTY WY-CONVERSE COUNTY LOWER ELEVATIONS WY- 128 PM MDT TUE JUN 16 2015 ...SIGNIFICANT WEATHER ADVISORY FOR EAST CENTRAL CONVERSE AND NORTHWESTERN PLATTE COUNTIES UNTIL 215 PM MDT... AT 128 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 10 MILES NORTHWEST OF GLENDO...OR 15 MILES SOUTHEAST OF DOUGLAS...MOVING EAST AT 25 MPH. NICKEL SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... GLENDO...TWO MOON CAMPGROUND AND GLENDO RESERVOIR. THIS INCLUDES INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 109 AND 127. THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. LAT...LON 4255 10526 4267 10521 4259 10480 4240 10491 TIME...MOT...LOC 1928Z 283DEG 22KT 4260 10518 HAMMER
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
215 PM MDT TUE JUN 16 2015
WYZ114>116-162045-
SOUTH LARAMIE RANGE WY-SNOWY RANGE WY-LARAMIE VALLEY WY-
215 PM MDT TUE JUN 16 2015
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN ALBANY COUNTY UNTIL
245 PM MDT...
AT 214 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR
HUTTON LAKE...OR 14 MILES SOUTHWEST OF LARAMIE...MOVING EAST AT 20
MPH.
NICKEL SIZE HAIL WILL BE POSSIBLE WITH THIS STORM.
LOCATIONS IMPACTED INCLUDE...
THE BUTTES...LAKE HATTIE RESERVOIR...TIE SIDING...HUTTON LAKE AND
WOODS LANDING-JELM.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
OFFICE IN CHEYENNE.
&&
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MDT FOR
SOUTHEASTERN WYOMING.
LAT...LON 4106 10597 4126 10597 4126 10546 4100 10552
4099 10555
TIME...MOT...LOC 2014Z 274DEG 18KT 4119 10580
HAMMERSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
230 PM MDT TUE JUN 16 2015
WYZ108-162100-
GOSHEN COUNTY WY-
230 PM MDT TUE JUN 16 2015
...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN GOSHEN COUNTY UNTIL
300 PM MDT...
AT 230 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 11
MILES NORTHEAST OF GUERNSEY CAMPGROUND...OR 25 MILES SOUTH OF LUSK...
MOVING SOUTHEAST AT 20 MPH.
DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH
THIS STORM.
THIS STORM WILL REMAIN OVER MAINLY RURAL AREAS OF NORTHWESTERN GOSHEN
COUNTY.
THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND
TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL
INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE.
A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MDT FOR
SOUTHEASTERN WYOMING.
LAT...LON 4236 10421 4221 10454 4233 10465 4245 10465
4252 10458
TIME...MOT...LOC 2030Z 311DEG 18KT 4241 10459
HAMMERSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 235 PM MDT TUE JUN 16 2015 WYZ103-106-107-162100- CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY WY- EAST PLATTE COUNTY WY-NORTH LARAMIE RANGE WY- 235 PM MDT TUE JUN 16 2015 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN ALBANY AND NORTHWESTERN PLATTE COUNTIES UNTIL 300 PM MDT... AT 234 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 7 MILES EAST OF HARRIS PARK...OR 21 MILES NORTHWEST OF WHEATLAND... MOVING EAST AT 20 MPH. DIME SIZE HAIL AND WINDS IN EXCESS OF 40 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... LAKEVIEW NORTH. THIS INCLUDES INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 85 AND 103. THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MDT FOR SOUTHEASTERN WYOMING. LAT...LON 4225 10531 4242 10522 4235 10482 4210 10495 TIME...MOT...LOC 2034Z 290DEG 16KT 4232 10518 HAMMER
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 243 PM MDT TUE JUN 16 2015 WYZ101-103-162130- CONVERSE COUNTY LOWER ELEVATIONS WY-NORTH LARAMIE RANGE WY- 243 PM MDT TUE JUN 16 2015 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN CONVERSE COUNTY UNTIL 330 PM MDT... AT 243 PM MDT...DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 8 MILES SOUTHWEST OF GLENROCK...OR 19 MILES EAST OF CASPER...MOVING EAST AT 20 MPH. NICKEL SIZE HAIL AND WIND GUSTS UP TO 50 MPH WILL BE POSSIBLE WITH THIS STORM. LOCATIONS IMPACTED INCLUDE... DOUGLAS...GLENROCK...LAPRELE RESERVOIR AND DEER CREEK. THIS INCLUDES INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 141 AND 173. THIS STORM MAY INTENSIFY...SO BE CERTAIN TO MONITOR LOCAL RADIO AND TV STATIONS...AS WELL AS LOCAL CABLE TV OUTLETS...FOR ADDITIONAL INFORMATION AND POSSIBLE WARNINGS FROM THE NATIONAL WEATHER SERVICE. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 900 PM MDT FOR EAST CENTRAL WYOMING. LAT...LON 4268 10605 4286 10603 4286 10541 4251 10545 TIME...MOT...LOC 2043Z 281DEG 17KT 4277 10596 HAMMER
The Cheyenne radar (KCYS), 196 km away, was scanning. The volume nearest the first event began at 21:02 UTC.
11 hail, 1 tornado, 1 funnel cloud, 1 thunderstorm wind. Local standard time, as filed.
An EF0 tornado touched down in open country just east of Box Elder Creek and was on the ground for two minutes before it lifted. No damage was reported.
Golf ball size hail was observed 17 miles west of Douglas.
A funnel cloud was observed eight miles south-southwest of Fort Laramie.
Quarter size hail was observed 10 miles south of Fort Laramie.
Golf ball size hail was observed at Glendo.
Half dollar size hail was observed three miles north of Veteran.
Quarter size hail was observed three miles northeast of Cheyenne.
Golf ball size hail was observed five miles north of Guernsey.
Half dollar size hail was observed 12 miles south-southwest of Glendo.
The wind sensor at the Torrington Airport measured a peak gust of 63 mph.
Golf ball size hail was observed at Torrington.
Quarter size hail was observed five miles west of Guernsey.
Golf ball size hail was observed three miles west of Hawk Springs.
Ping pong ball size hail was observed three miles south of Hawk Springs.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2015Every state in 2015This day in weather historyThe tornado archive for Wyoming, 2015Warnings in Wyoming, June 2015
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: 584114, 584110, 584121, 584117, 584145, 584146, 584147, 584148, 584149, 584150, 584151, 584152, 584158, 584160.