Late afternoon thunderstorms produced large hail across Laramie County.
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.
Late afternoon thunderstorms produced large hail across Laramie 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 Jun 15, 2:03 PM MST, 1 hour 42 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 303 PM MDT SAT JUN 15 2013 .SHORT TERM...(THIS EVENING THROUGH SUNDAY NIGHT) ISSUED AT 303 PM MDT SAT JUN 15 2013 A BIT OF CONVECTION FIRING OVER THE SOUTHERN LARAMIE RANGE AT THIS TIME BUT NOT HOLDING TOGETHER MUCH AS IT LEAVES THE MTNS. THIS LIKELY A RESULT OF SOME CAPPING CONTINUING OVER THE PLAINS. STILL MAY SEE SOME ISOLATED CONVECTION THIS EVENING OVER THE PLAINS THOUGH LACK OF SIG FORCING WILL HINDER IT. ANY THAT DO ORGANIZE COULD GET QUITE STRONG OR SEVERE OVER THE FAR SOUTHERN PARTS OF THE AREA. ACTIVITY SHOULD END/MOVE OUT BY MID EVENING WITH MAINLY CLEARS SKIES FOR THE REST OF THE NIGHT. ANOTHER ROUND OF SHOWERS AND STORMS LOOKING A BIT BETTER FOR SUNDAY AND MONDAY AS UPPER IMPULSES TRAVERSE THE REGION PROVIDING A BIT MORE LIFT. ACTIVITY SHOULD ALSO BE AIDED BY A SECONDARY PUSH OF COOLER AIR DOWN THE HIGH PLAINS WHICH WILL INCREASE SHEAR. DECENT INSTABILITY SHOULD ALSO EXIST MAINLY OVER THE PANHANDLE. LITTLE CHANGE IN THE WEATHER OTHERWISE AS UPPER RIDGE TO THE WEST MOVES LITTLE THROUGH MONDAY. .LONG TERM...(MONDAY THROUGH SATURDAY) ISSUED AT 303 PM MDT SAT JUN 15 2013 LONG TERM LOOKS TO BE A COMMON PATTERN SEEN DURING PAST SEVERAL WEEKS WITH MOISTURE AND INSTABILITY AXIS IN PANHANDLE. SFC FLOW WILL SHIFT LITTLE MORE SOUTH ON TUE AND INCREASE WITH SW FLOW ALOFT. STILL CHC FOR CONVECTION FROM LARAMIE RANGE EAST INTO PANHANDLE WITH BETTER CHANCE OF RAIN WITH DEEPER THETA-E RIDGE PROFILE. BY WED LARGE UPPER LOW OVER PACIFIC NW WILL SHIFT FARTHER INLAND AND INCREASE SW FLOW ALOFT. THIS WILL INCREASE DRYING ACROSS WESTERN CWA AND SHIFT DEEPER MOISTURE/INSTABILITY BACK INTO NE PANHANDLE. WITH MORE WEST TO SOUTHWEST FLOW INFLUENCE INTO SATURDAY...WILL KEEP BEST CHC OF CONVECTION INTO PANHANDLE. TEMPS WILL WARM WED THROUGH SATURDAY 5-10 DEG ABOVE NORMAL AS +15C TO +19C 700MB TEMPS SHIFT OVER THE CWA. SLA && .AVIATION...(FOR THE 18Z TAFS THROUGH 18Z SUNDAY MORNING) ISSUED AT 303 PM MDT SAT JUN 15 2013 SMALL AREA OF MVFR CIGS WILL AFFECT THE KSNY AREA INTO EARLY THIS AFTERNOON BEFORE RISING TO LOW SIDE OF VFR WHILE BREAKING UP. VFR ELSEWHERE TODAY. A FEW SHOWERS AND TSTMS SHOULD DEVELOP OVER THE LARAMIE RANGE THIS AFTERNOON AND MOVE E OR ESE INTO THIS EVENING AFFECTING MOSTLY THAT AREA FROM KCYS TO KSNY WITH ASSOCIATED BRIEF MVFR CIGS AND GUSTY WINDS. MAINLY VFR ALL TERMINALS LATER THIS EVENING THROUGH TONIGHT THOUGH PATCHY MVFR CIGS COULD RETURN TO THE SRN PANHANDLE LATER TONIGHT. && .FIRE WEATHER... ISSUED AT 303 PM MDT SAT JUN 15 2013 NO BIG CONCERNS ANTICIPATED OVER THE NEXT FEW DAYS WITH FUELS REMAINING NON-CRITICAL FOR THE TIME BEING. AFTERNOON RELATIVE HUMIDITIES WILL CONTINUE TO BE LOW OVER WESTERN DISTRICTS ALONG WITH SOME BREEZINESS AT TIMES. WIDELY SCATTERED MAINLY LATE DAY SHOWERS AND THUNDERSTORMS ARE EXPECTED FROM MAINLY THE LARAMIE RANGES EASTWARD ACROSS THE PLAINS BUT DRY LIGHTNING NOT EXPECTED TO BE MUCH OF A PROBLEM AS DECENT RAINFALL SHOULD FALL FROM MOST OF THE ACTIVITY. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...NONE. NE...NONE. && SHORT TERM...RE LONG TERM...SLA AVIATION...RE FIRE WEATHER...RE
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 1037 AM MDT SAT JUN 15 2013 NEZ002-003-019>021-054-055-095-096-WYZ101>103-106>108-116>119- 161215- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX-CONVERSE COUNTY LOWER ELEVATIONS- NIOBRARA COUNTY-NORTH LARAMIE RANGE- CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY- EAST PLATTE COUNTY-GOSHEN COUNTY-SOUTH LARAMIE RANGE- SOUTH LARAMIE RANGE FOOTHILLS-CENTRAL LARAMIE COUNTY- EAST LARAMIE COUNTY- 1037 AM MDT SAT JUN 15 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE...SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT ISOLATED SHOWERS AND THUNDERSTORMS SHOULD INITIATE OVER THE LARAMIE RANGE THIS AFTERNOON AND THEN MOVE EAST-SOUTHEAST ACROSS THE EASTERN PLAINS OF SOUTHEAST WYOMING INTO THE WESTERN NEBRASKA PANHANDLE LATE THIS AFTERNOON AND EVENING. A FEW STORMS COULD BECOME STRONG WITH HAIL AND STRONG DOWNBURST WINDS POSSIBLE MAINLY NEAR AND SOUTH OF THE INTERSTATE 80 CORRIDOR. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY STRONG STORMS WILL ALSO BE POSSIBLE ON SUNDAY AFTERNOON AND EVENING. AN ACTIVE WEATHER PATTERN WILL PERSIST THROUGH THE MIDDLE OF THE WEEK WITH DAILY CHANCES FOR SHOWERS AND STORMS OVER THE HIGH PLAINS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT EXPECTED THIS AFTERNOON AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE WYZ104-105-109>115-161215- 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- 1037 AM MDT SAT JUN 15 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY ISOLATED THUNDERSTORMS ARE EXPECTED ON SUNDAY AFTERNOON AND EVENING. WIND GUSTS TO 50 MPH ARE POSSIBLE WITH THESE STORMS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 322 PM MDT SAT JUN 15 2013 WYZ117-118-152215- CENTRAL LARAMIE COUNTY WY-SOUTH LARAMIE RANGE FOOTHILLS WY- 322 PM MDT SAT JUN 15 2013 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL LARAMIE COUNTY UNTIL 415 PM MDT... AT 317 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 5 MILES EAST OF FEDERAL...OR 14 MILES NORTHWEST OF CHEYENNE...MOVING EAST AT 30 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... WHITAKER... THIS INCLUDES INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 16 AND 32. THIS STORM MAY INTENSIFY...AND A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THIS AREA. 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 4156 10461 4124 10442 4120 10506 4135 10511 TIME...MOT...LOC 2122Z 255DEG 26KT 4129 10496 CLAYCOMB
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
424 PM MDT SAT JUN 15 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0310 PM HAIL 11 NNW CHEYENNE 41.29N 104.87W
06/15/2013 E0.50 INCH LARAMIE WY COCORAHS
AVERAGE WAS 1/4 INCH. NO DAMAGE. DURATION WAS 4 MINUTES.
&&
DDEALSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 424 PM MDT SAT JUN 15 2013 WYZ118-119-152330- CENTRAL LARAMIE COUNTY-EAST LARAMIE COUNTY- INCLUDING THE CITIES OF...CHEYENNE...BURNS...CARPENTER...ALBIN... PINE BLUFFS 424 PM MDT SAT JUN 15 2013 ...GUSTY OUTFLOW WINDS FROM THUNDERSTORMS NORTH OF CHEYENNE... THROUGH 530 PM...EXPECT NORTHEAST WINDS FROM AN OUTFLOW BOUNDARY TO MOVE INTO THE CHEYENNE...CARPENTER AND EVENTUALLY THE PINE BLUFFS AREA. THESE WINDS ARE FROM THE THUNDERSTORMS JUST NORTHEAST OF CHEYENNE THAT ARE MOVING EAST AT 25 MPH. NORTHEAST WINDS GUSTING UP TO 40 MPH ARE POSSIBLE THROUGH 530 PM.
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
431 PM MDT SAT JUN 15 2013
WYZ118-119-152315-
CENTRAL LARAMIE COUNTY WY-EAST LARAMIE COUNTY WY-
431 PM MDT SAT JUN 15 2013
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN LARAMIE COUNTY UNTIL
515 PM MDT...
AT 429 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM NEAR HILLSDALE...OR 14 MILES EAST OF CHEYENNE...
MOVING EAST AT 25 MPH.
HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM.
LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
HILLSDALE...
BURNS...
CARPENTER...
THIS INCLUDES INTERSTATE 80 IN WYOMING BETWEEN MILE MARKERS 372 AND
399.
THIS STORM MAY INTENSIFY...AND A SEVERE THUNDERSTORM WATCH IS IN
EFFECT FOR THIS AREA. 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 4114 10464 4129 10466 4123 10406 4099 10421
4099 10434
TIME...MOT...LOC 2231Z 290DEG 23KT 4119 10452
CLAYCOMBThe Cheyenne radar (KCYS), 17 km away, was scanning. The volume nearest the first event began at 22:43 UTC.
4 hail. Local standard time, as filed.
Half dollar to golf ball size hail was observed north of Cheyenne. There was minor leaf damage to trees.
Dime to quarter size hail was reported near Hillsdale.
Nickel to quarter size hail covered the ground north of Cheyenne.
Quarter size hail was reported northeast of Cheyenne.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2013Every state in 2013This day in weather historyWarnings in Wyoming, June 2013
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: 448404, 448406, 448407, 448410.