A thunderstorm in extreme northeast Niobrara County produced large hail.
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.
A thunderstorm in extreme northeast Niobrara County produced large hail.
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 17, 6:02 PM MST, 43 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 702 PM MDT TUE JUN 17 2014 .SHORT TERM...(THIS EVENING THROUGH THURSDAY NIGHT) ISSUED AT 215 PM MDT TUE JUN 17 2014 TONIGHT...EXPECTING ISOLATED STRONG TO SEVERE THUNDERSTORMS THROUGH THIS EVENING FROM CONVERSE COUNTY THROUGH NIOBRARA COUNTY AND OVER NORTHERN SIOUX AND DAWES COUNTIES OF NEBRASKA...WITH BEST FOCUS FOR ISOLATED SEVERE THUNDERSTORMS THROUGH THIS EVENING NORTH OF A DULL CENTER WYOMING TO CHADRON NEBRASKA LINE...WHERE SHEAR AND INSTABILITY WILL BE MAXIMIZED...THOUGH ISOLATED STRONG THUNDERSTORMS WILL OCCUR NORTH OF A DOUGLAS TO ALLIANCE LINE...ALONG AND NORTH OF A LOW LEVEL CONVERGENCE BOUNDARY. AS A POTENT COLD FRONT MOVES ACROSS SOUTHEAST WYOMING THIS EVENING AND ACROSS WESTERN NEBRASKA AFTER MIDNIGHT...EXPECT A FEW STRONG TO SEVERE THUNDERSTORMS THIS EVENING OVER THE NORTHERN NEBRASKA PANHANDLE WHERE INSTABILITY AND SHEAR WILL BE COINCIDENT...WHILE A FEW STRONG TO SEVERE THUNDERSTORMS WILL OCCUR OVER CONVERSE AND NIOBRARA COUNTIES THROUGH EARLY EVENING BEFORE THE COLD FRONT PLOWS THROUGH. WEDNESDAY...AUTUMNAL...BREEZY AND MUCH COOLER DAY IN THE WAKE OF THE RELATIVELY STRONG MID JUNE COLD FRONT. DECENT UPWARD VERTICAL MOTION IN THE AFTERNOON AND ENOUGH LOW AND MID LEVEL MOISTURE WILL PRODUCE SCATTERED TO NUMEROUS AFTERNOON SHOWERS AND ISOLATED THUNDERSTORMS EAST OF INTERSTATE 25. WEDNESDAY NIGHT...CLEARING AND COOL IN THE WAKE OF THE SHORTWAVE TROUGH PASSAGE. THURSDAY...CONTINUED DRY AND RELATIVELY COOL FOR MID JUNE WITH ZONAL FLOW ALOFT AND 700 MB TEMPERATURES NEAR 6 CELSIUS AND 1000-500 MB THICKNESSES NEAR 5730 METERS. THURSDAY NIGHT...SEASONABLY COOL AND UNEVENTFUL OVERNIGHT WITH ZONAL FLOW ALOFT. .LONG TERM...(FRIDAY THROUGH TUESDAY) ISSUED AT 245 PM MDT TUE JUN 17 2014 SOME DIFFERENCES WITH THE 12Z MEDIUM TO LONG RANGE MODEL GUIDANCE. NORTHERN PLAINS UPPER LOW LIFTS NORTHEAST INTO CANADA FRIDAY WITH RIDGE BUILDING OVER THE HIGH PLAINS THIS WEEKEND. LEE SIDE SURFACE LOW DEVELOPS OVER THE CENTRAL HIGH PLAINS WITH BROAD SURFACE RIDGE PATTERN OVER THE INTERMOUNTAIN WEST. THIS PATTERN WILL PROMOTE A SOUTH TO SOUTHEAST LOW LEVEL WIND PATTERN DRAWING GULF MOISTURE INTO SOUTHEAST WY AND WESTERN NE. PRECIP WATER VALUES REACH 1-1.5 INCHES SUNDAY OVER THE HIGH PLAINS WITH DAYTIME DEW POINTS IN THE 50S ALONG AND EAST OF THE LARAMIE RANGE. WEAK DISTURBANCES ALOFT MIGRATING THROUGH THE MEAN RIDGE AND OSCILLATING SURFACE DRYLINE/TROUGH OVER THE HIGH PLAINS COMBINED WITH LOW/MID LEVEL INSTABILITY WILL TRIGGER ISOLATED CONVECTION SATURDAY...WITH MORE SCATTERED COVERAGE SUNDAY AND MONDAY. FAVORED TIMING FOR SHOWER/TSTORM ACTIVITY WILL BE AFTERNOON/EVENING WITH MORE ISOLATED COVERAGE DURING THE LATE NIGHT AND MORNING. WITH RIDGE OVERHEAD...LIGHTER STEERING WINDS ALOFT WILL FAVOR LOCALLY HEAVY RAINFALL AND MITIGATE SEVERE TSTORM RISK. CONVECTIVE COVERAGE DECREASES A BIT TUESDAY WITH SLIGHT WARMING ALOFT. TEMPERATURES WILL BE ABOVE AVERAGE THIS WEEKEND... WARMEST SATURDAY WITH 70S AND 80S FOR LOWER ELEVATIONS. TEMPERATURES MODERATE BACK TO SEASONAL NORMALS EARLY NEXT WEEK. && .AVIATION...(FOR THE 00Z TAFS THROUGH 00Z WEDNESDAY AFTERNOON) ISSUED AT 701 PM MDT TUE JUN 17 2014 WIDELY SCATTERED SHOWERS AND TSTORMS WILL CONTINUE THIS EVENING AHEAD OF A COLD FRONT THAT WILL MOVE SOUTHEAST ACROSS THE FORECAST AREA TONIGHT. GUSTY SOUTHERLY WINDS AHEAD OF THE FRONT WILL VEER TO THE WEST-NORTHWEST FOLLOWING FROPA...WITH GUSTS UP TO 30 KTS POSSIBLE. THERE IS THE POTENTIAL FOR LOW END MVFR CIGS AT CHADRON AND ALLIANCE AFTER 10Z...OTHERWISE VFR. WINDS WILL REMAIN GUSTY THROUGH MUCH OF TOMORROW...WITH ANOTHER CHANCE FOR AFTERNOON SHOWERS AND THUNDERSTORMS FOR AREAS ALONG AND EAST OF THE LARAMIE RANGE. && .FIRE WEATHER... ISSUED AT 215 PM MDT TUE JUN 17 2014 NO CONCERNS THROUGH THURSDAY WITH EXPECTED WINDS AND HUMIDITIES. WILL NEED TO WATCH FRIDAY AND SATURDAY AS HUMIDITIES BEGIN TO FALL AGAIN INTO THE 10 TO 20 PERCENT RANGE IN THE AFTERNOONS WEST OF INTERSTATE 25. && .HYDROLOGY... ISSUED AT 230 PM MDT TUE JUN 17 2014 RIVER LEVELS WILL CONTINUE TO SLOWLY RECEDE THE NEXT FEW DAYS WITH THE UPPER NORTH PLATTE RIVER AT SARATOGA AND THE LARAMIE RIVER AT LARAMIE JUST BELOW ACTION STAGE. WARM TEMPERATURES TODAY WILL COOL WEDNESDAY AND THURSDAY. THERE REMAINS A DECENT SNOW PACK ABOVE 10000 FEET IN THE SNOWY AND SIERRA MADRE RANGES...SO ADDITIONAL SNOW MELT MAY RESULT IN RIVER RISES THIS WEEKEND AS TEMPERATURES RISE ONCE AGAIN. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...NONE. NE...NONE. && SHORT TERM...RUBIN LONG TERM...JAMSKI AVIATION...RJM FIRE WEATHER...RUBIN HYDROLOGY...JAMSKI
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 1031 AM MDT TUE JUN 17 2014 NEZ003-019>021-054-055-096-WYZ103>119-181645- BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- SOUTH SIOUX-NORTH LARAMIE RANGE-FERRIS/SEMINOE/SHIRLEY MOUNTAINS- SHIRLEY BASIN-CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY- EAST PLATTE COUNTY-GOSHEN 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- CENTRAL LARAMIE COUNTY-EAST LARAMIE COUNTY- 1031 AM MDT TUE JUN 17 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE...EAST CENTRAL WYOMING...SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY SCATTERED THUNDERSTORMS WILL MOVE ACROSS THE AREA WEDNESDAY AFTERNOON AND EVENING. SEVERE STORMS ARE NOT EXPECTED. .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 NEZ002-095-WYZ101-102-181645- DAWES-NORTH SIOUX-CONVERSE COUNTY LOWER ELEVATIONS- NIOBRARA COUNTY- 1031 AM MDT TUE JUN 17 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE AND EAST CENTRAL WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS THIS AFTERNOON AND EVENING...ROUGHLY ALONG AND NORTH OF A LINE FROM DULL CENTER TO CHADRON...INCLUDING EXTREME NORTHEAST CONVERSE COUNTY...NORTHERN NIOBRARA COUNTY...FAR NORTHEAST SIOUX COUNTY AND NORTHERN DAWES COUNTY INCLUDING CHADRON. ELSEWHERE...A FEW STRONG THUNDERSTORMS WILL OCCUR THIS AFTERNOON AND EVENING. SURFACE LOW PRESSURE WILL DEVELOP OVER EASTERN WYOMING THIS AFTERNOON...WITH STRONG LOW LEVEL CONVERGENCE NOTED ALONG AND NORTH OF THE LOW ACROSS NORTHERN CONVERSE...NORTHERN NIOBRARA... NORTHERN SIOUX AND NORTHERN DAWES COUNTIES. A POTENT COLD FRONT WILL MOVE WEST TO EAST ACROSS THE WYOMING COUNTIES THIS EVENING... AND ACROSS WESTERN NEBRASKA AROUND MIDNIGHT TONIGHT. ISOLATED THUNDERSTORMS WILL DEVELOP AS THE AFTERNOON PROGRESSES... AND INCREASE IN STRENGTH DURING THE LATE AFTERNOON AND EARLY EVENING HOURS. STORMS WILL MOVE NORTH NORTHEAST AT 25 MPH. A FEW OF THE STORMS WILL BECOME STRONG...OR POSSIBLY SEVERE...AND THE PRIMARY THREAT AREA FOR A SEVERE THUNDERSTORM OR TWO WILL BE ACROSS NORTHERN NIOBRARA COUNTY INCLUDING MULE CREEK JUNCTION AND REDBIRD...OVER NORTHERN SIOUX COUNTY INCLUDING HARRISON AND MONTROSE...AND OVER NORTHERN DAWES COUNTY INCLUDING CHADRON AND WHITNEY. THREATS FROM THE ISOLATED STRONG TO SEVERE THUNDERSTORMS WILL INCLUDE WIND GUSTS OF 50 TO 65 MPH...ALONG WITH HAIL UP TO ONE INCH IN DIAMETER...THOUGH ANY STORMS THAT DO DEVELOP WILL BE ISOLATED. THE THREAT FOR ISOLATED STRONG TO SEVERE THUNDERSTORMS WILL SHIFT ACROSS NORTHERN SIOUX AND NORTHERN DAWES COUNTIES OF NEBRASKA DURING THE EVENING...AND STORMS WILL DECREASE IN STRENGTH AND COVERAGE SHORTLY AFTER MIDNIGHT AS A STRONG COLD FRONT MOVES ACROSS THE COUNTIES. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY SCATTERED THUNDERSTORMS WILL MOVE ACROSS THE AREA WEDNESDAY AFTERNOON AND EVENING. SEVERE STORMS ARE NOT EXPECTED. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT. WE APPRECIATE ANY REPORTS FROM THUNDERSTORMS...ESPECIALLY REPORTS OF STRONG WINDS...HAIL AND HEAVY RAIN. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE RUBIN
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 538 PM MDT TUE JUN 17 2014 WYZ101>115-180100- CONVERSE COUNTY LOWER ELEVATIONS-NIOBRARA COUNTY- NORTH LARAMIE RANGE-FERRIS/SEMINOE/SHIRLEY MOUNTAINS- SHIRLEY BASIN-CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY- EAST PLATTE COUNTY-GOSHEN COUNTY-CENTRAL CARBON COUNTY- NORTH SNOWY RANGE FOOTHILLS-SOUTHWEST CARBON COUNTY- SIERRA MADRE RANGE-UPPER NORTH PLATTE RIVER BASIN-SNOWY RANGE- LARAMIE VALLEY- INCLUDING THE CITIES OF...DOUGLAS...GLENROCK...LUSK...MUDDY GAP... MEDICINE BOW...BORDEAUX...GLENDO...WHEATLAND...CHUGWATER... GUERNSEY...TORRINGTON...RAWLINS...SINCLAIR...HANNA...ARLINGTON... ELK MOUNTAIN...BAGGS...DIXON...SARATOGA...ENCAMPMENT... RIVERSIDE...CENTENNIAL...ALBANY...WOODS LANDING...LARAMIE 538 PM MDT TUE JUN 17 2014 LIGHT SHOWERS AND A VERY ISOLATED THUNDERSTORMS WILL BE FOUND OVER MUCH OF SOUTHEAST WYOMING THROUGH EARLY THIS EVENING. LITTLE IN THE WAY OF PRECIPITATION IS EXPECTED WITH MOST OF THIS ACTIVITY... HOWEVER...WIND GUSTS OF 45 TO 55 MPH WILL BE POSSIBLE WITH SOME SHOWERS AND THUNDERSTORMS. MOTORIST SHOULD PREPARE FOR SUDDEN WIND GUSTS WHEN TRAVELING NEAR THESE SHOWERS AND THUNDERSTORMS. SML
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
635 PM MDT TUE JUN 17 2014
WYZ102-180100-
NIOBRARA COUNTY WY-
635 PM MDT TUE JUN 17 2014
...SIGNIFICANT WEATHER ADVISORY FOR EASTERN NIOBRARA COUNTY UNTIL 700
PM MDT...
AT 634 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 16 MILES NORTHEAST OF LUSK...MOVING NORTHEAST AT
20 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...
MAINLY RURAL AREAS OF EASTERN NIOBRARA COUNTY.
IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.
&&
LAT...LON 4312 10404 4307 10404 4285 10424 4293 10446
4319 10430
TIME...MOT...LOC 0036Z 206DEG 18KT 4297 10429
LIEBLSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
718 PM MDT TUE JUN 17 2014
NEZ095-WYZ102-180145-
NIOBRARA COUNTY WY-NORTH SIOUX NE-
718 PM MDT TUE JUN 17 2014
...SIGNIFICANT WEATHER ADVISORY FOR EXTREME NORTHWESTERN SIOUX AND
EASTERN NIOBRARA COUNTIES UNTIL 745 PM MDT...
AT 712 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 16 MILES SOUTH OF REDBIRD...OR 24 MILES NORTHEAST
OF LUSK...MOVING NORTHEAST AT 20 MPH.
HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 50 MPH ARE
EXPECTED WITH THIS STORM.
LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE...
MAINLY RURAL AREAS OF EXTREME EASTERN NIOBRARA COUNTY.
&&
LAT...LON 4327 10404 4301 10404 4300 10403 4293 10410
4302 10435 4329 10420
TIME...MOT...LOC 0118Z 211DEG 18KT 4306 10414
MAZURThe Rapid City radar (KUDX), 136 km away, was scanning. The volume nearest the first event began at 01:46 UTC.
1 hail. Local standard time, as filed.
Penny to quarter size hail was reported 10 miles east of Redbird on Highway 18.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2014Every state in 2014This day in weather historyWarnings in Wyoming, June 2014
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: 526438.