Heavy rainfall from late day thunderstorms generated flash flooding in portions of Scotts Bluff 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.
Heavy rainfall from late day thunderstorms generated flash flooding in portions of Scotts Bluff 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 6, 2:52 PM MST, 1 hour 38 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 352 PM MDT WED JUN 6 2012 .SHORT TERM...THIS AFTERNOON THROUGH THURSDAY NIGHT...CURRENT VISIBLE SATELLITE LOOP AND SURFACE OBS SHOW CU DEVELOPING ACROSS THE CHEYENNE RIDGE AS THE FRONTAL BOUNDARY...WHICH PUSHED ACROSS THE AREA AS A COOL FRONT LAST NIGHT...MOVING NORTHWESTWARD AS A SURFACE LOW IS CURRENTLY DEVELOPING ACROSS CENTRAL COLORADO PLAINS. THIS FRONT AND ASSOCIATED LOW PRESSURE WILL CONTINUE MOVING NORTHWARD ACROSS THE AREA INTO THIS EVENING. MOISTURE ADVECTION IS CURRENTLY UNDERWAY WITH DEWPOINTS AT CHEYENNE AND KIMBALL INCREASING TO ALMOST 50F DEGREES AT 2 PM. STILL EXPECTING NUMEROUS RAIN SHOWERS AND THUNDERSTORMS LATE THIS AFTERNOON AND TONIGHT AS THE ENVIRONMENT DESTABILIZES AND BECOMES MORE FAVORABLE. THE UPPER LEVEL SHORT WAVE IS JUST STARTING TO PUSH ACROSS THE CENTRAL ROCKIES...WHICH WILL THEN MOVE INTO SOUTHEAST WYOMING AND WESTERN NEBRASKA THIS EVENING. THIS WILL ENHANCE LIFT AND RAINFALL WITH A GOOD CHANCE OF SEVERE THUNDERSTORMS FROM THE LARAMIE RANGE EASTWARD INTO WESTERN NEBRASKA. ANY STORMS/SEVERE STORMS WILL DEVELOP FURTHER SOUTH NEAR THE I80 CORRIDOR FIRST AND THEN GRADUALLY MOVE NORTHWARD THIS EVENING. MAIN CONCERN WILL BE LARGE HAIL AND DAMAGING WINDS THROUGH LATE THIS EVENING...GRADUALLY TRANSITIONING TOO A HEAVY RAIN THREAT ACROSS THE PANHANDLE OF NEBRASKA AND EXTREME SOUTHEAST WYOMING. THERE IS A CHANCE FOR SOME ISOLATED TORNADOES DUE TO INCREASING LLVL SHEAR INTO THIS EVENING...ESPECIALLY NEAR LLVL OUTFLOW/CONVERGENCE BOUNDARIES. HOWEVER...LLVL SHEAR AND HELICITY VALUES ARE NOT ALL THAT IMPRESSIVE...SO ANY TORNADOES SHOULD BE RELATIVELY WEAK. RAINFALL WILL BECOME MORE WIDESPREAD TONIGHT AND LIFT NORTHWARD AS THE SEVERE WEATHER THREAT SLOWLY DIMINISHES. LOCALIZED FLASH FLOODING WILL BECOME THE MAIN THREAT STARTING THIS EVENING. AFTER MIDNIGHT...PATCHY FOG IS EXPECTED TO DEVELOP ALONG AND SOUTH OF THE PLATTE RIVER VALLEY. ON THURSDAY...THE COOL FRONT WILL PUSH BACK EASTWARD BEHIND THE SURFACE LOW. WITH LLVL MOISTURE AND INSTABILITY...ALONG WITH LLVL CONVERGENCE AND ANOTHER SHORT WAVE TROUGH PUSHING EASTWARD ACROSS THE REGION...THERE IS ANOTHER GOOD CHANCE FOR STRONG AND SEVERE TSTORMS EAST OF THE LARAMIE RANGE. THE AREA UNDER THE GREATEST RISK IS PRETTY SIMILAR TO TODAY. VERY LOW LI/S NEAR -7C TO -9C AND PW/S OVER ONE INCH SHOW A GOOD POTENTIAL FOR AT LEAST STRONG STORMS. .LONG TERM...FRIDAY-WEDNESDAY FRIDAY: THE MAIN CONCERN WITH THIS TIME FRAME IS HOW MUCH LOW LEVEL MOISTURE WE WILL BE ABLE TO RETAIN EAST OF THE LARAMIE RANGE AFTER THE SHORTWAVE EXITS THE AREA ON THURSDAY. MEANWHILE...THE MORE AMPLIFIED UPPER LEVEL TROF ACROSS THE PACIFIC NORTHWEST WILL CONTINUE TO CHURN. AS THIS TROF CONTINUES TO DIG AND AMPLIFY...THIS MAY ALLOW FOR THE LOW LEVEL FLOW TO BACK MORE TO THE SOUTH WHICH MAY KEEP THE LOW LEVEL MOISTURE IN PLACE DURING THE NEXT COUPLE OF DAYS. AS A RESULT...WE WENT AHEAD AND ADDED POPS TO AREAS EAST OF THE LARAMIE RANGE ON FRIDAY. IF THE MOISTURE DOES STAY IN PLACE EAST OF THE LARAMIE RANGE...INSTABILITY MAY BE ENOUGH TO PRODUCE SOME STRONG STORMS. ALTHOUGH...0-6KM SHEAR VALUES WILL BE QUITE MARGINAL OF 30-40KTS. GUSTY SOUTHWEST WINDS OF 25 TO 35 KTS WILL ALSO BE POSSIBLE ACROSS AREAS WEST OF THE LARAMIE RANGE. DEWPOINTS ARE ALSO PROGGED TO BE IN THE TEENS AND 20S WHICH MAY CAUSE SOME RED FLAG CONDITIONS TO DEVELOP. WE WILL HAVE TO WATCH OUR FUEL STATUS IN THAT AREA DURING THE NEXT COUPLE OF DAYS. SATURDAY WILL BE QUITE TRICKY ON THE PLACEMENT OF THE LOW LEVEL MOISTURE. LATEST MODEL TRENDS ARE SHOWING THE LOW LEVEL MOISTURE TRYING TO RETREAT TO THE WEST AHEAD OF THE DIGGING UPPER LEVEL TROF. WE HAVE NOT ADDED ANY POPS DURING THAT PERIOD YET...BUT IT WILL CERTAINLY NEED TO BE WATCHED AS THE PACIFIC FRONT MOVES THROUGH THE REGION. MORE WIDESPREAD RED FLAG CONDITIONS WILL BE POSSIBLE ON THIS DAY AS WELL AS GOOD MIXING DEVELOPS AHEAD OF THE TROF. TEMPERATURES ON FRIDAY AND SATURDAY WILL BE VERY WARM AS WELL WITH HIGHS IN THE 90S EAST OF THE LARAMIE RANGE WITH 80S WEST. SUNDAY-WEDNESDAY: MORE SEASONABLE TEMPERATURES CAN BE EXPECTED AS THE UPPER LEVEL TROF SHIFTS SHIFTS EAST OF THE REGION AND ALLOWS FOR MORE ZONAL FLOW TO PREVAIL. MOST OF THE MOISTURE WILL SHIFT EAST OF THE AREA WHICH WILL ALLOW FOR MOSTLY DRY CONDITIONS TO PREVAIL THROUGH MONDAY. THE ECMWF/GFS ARE SHOWING ANOTHER WEAK UPPER LEVEL SHORTWAVE PUSHING THROUGH THE REGION ON TUESDAY WHICH MAY ALLOW FOR SOME LOW LEVEL MOISTURE TO RETURN. SHEAR PROFILES ARE AROUND 30-40KTS WHICH COULD BRING ANOTHER DECENT CHANCE OF STRONG THUNDERSTORMS EAST OF THE LARAMIE RANGE. WE WILL HAVE TO SEE THINGS EVOLVE WITH REGARDS TO THE MOISTURE RETURN NEXT WEEK. && .AVIATION...18Z TAF ISSUANCE LATEST VISIBLE IMAGERY WAS SHOWING THE CUMULUS FIELD STARTING TO DEVELOP OVER THE SOUTHERN NEBRASKA PANHANDLE. LATEST RADAR LOOP WAS SHOWING A DEWPOINT BOUNDARY STARTING TO LIFT NORTHWEST TOWARDS CHEYENNE. THIS BOUNDARY COMBINED WITH OTHER BOUNDARIES ALONG THE LARAMIE RANGE WILL AID IN SETTING THE STAGE FOR SOME CLUSTERS OF THUNDERSTORMS THIS AFTERNOON. THE MAIN QUESTION AT THIS POINT...IS THE TIMING OF WHEN THESE STORMS WILL DEVELOP. BASED ON THE CUMULUS FIELD DEVELOPMENT/AND LOCAL STORM SCALE MODELS...IT IS POSSIBLE THAT SOME OF THE STORMS MAY ERUPT A LITTLE EARLIER ACROSS THE SOUTHERN NEBRASKA PANHANDLE...ESPECIALLY NEAR SNY AND POSSIBLY BFF AROUND 20Z-22Z. THEN MORE STORMS MAY DEVELOP TOWARDS CYS CLOSER TO 00Z. NOT SURE IF THE STORMS WILL FIRE NEAR LAR YET...BUT WE HAVE LEFT VCTS IN THE TAFS FOR NOW. SOME OF THE STORMS COULD BECOME SEVERE ESPECIALLY NEAR BFF...CYS...AND SNY. WE ARE NOT ADVERTISING THE SEVERE POTENTIAL YET IN THE TAFS...BUT WE WILL WAIT AND SEE WHERE STORMS GET GOING BEFORE MAKING THAT CALL. THE STORMS MAY PERSIST THROUGH THE 03Z BEFORE DIMINISHING. AFTER 03Z...LOW LEVEL MOISTURE WILL CONTINUE TO ADVECT INTO THE REGION AND WITH GOOD UPSLOPE FLOW ACROSS CYS WE MAY SEE SOME LIFR CONDITIONS DEVELOP TOWARDS 08Z. SNY AND BFF MAY ALSO EXPERIENCE IFR CONDITIONS TOWARDS DAYBREAK DUE TO GOOD UPSLOPE CONDITIONS. THE REMAINDER OF THE TAF SITES SHOULD BE MOSTLY VFR. && .FIRE WEATHER...A PACIFIC FRONT WHICH STALLED ACROSS THE NEBRASKA PANHANDLE THIS MORNING HAS STARTED TO MOVE BACK NORTHWESTWARD THIS AFTERNOON DUE TO A LOW PRESSURE SYSTEM DEVELOPING ACROSS THE AREA. EXPECT WIDESPREAD RAINFALL ACROSS THE HIGH PLAINS PLAINS AND LARAMIE RANGE MOUNTAINS THIS AFTERNOON WITH THIS SYSTEM...ALONG WITH THE POTENTIAL FOR SEVERE THUNDERSTORMS SOUTH OF A LINE FROM LARAMIE TO CHADRON. MOSTLY DRY AND BREEZY CONDITIONS WILL OCCUR WEST OF THE FRONT IN CARBON COUNTY. SCATTERED TO NUMEROUS SHOWERS WILL RETURN TO THE EASTERN PLAINS THURSDAY AFTERNOON AS THE FRONT THEN BEGINS TO MOVE EAST ACROSS THE DISTRICT. WESTERN PART OF THE DISTRICT WILL ONCE AGAIN BE DRY WITH HUMIDITIES DROPPING TO THE LOW TEENS. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...NONE. NE...NONE. && SHORT TERM/FIRE WEATHER...TJT LONG TERM/AVIATION...REC
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 326 PM MDT WED JUN 6 2012 WYZ101>119-071100- 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-SOUTH LARAMIE RANGE-SOUTH LARAMIE RANGE FOOTHILLS- CENTRAL LARAMIE COUNTY-EAST LARAMIE COUNTY- 326 PM MDT WED JUN 6 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT SHOWERS AND THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS SOUTHEAST WYOMING THIS AFTERNOON AND THIS EVENING AND BE MOST NUMEROUS ACROSS PLATTE...GOSHEN AND LARAMIE COUNTIES. THESE THUNDERSTORMS WILL HAVE THE POTENTIAL TO BECOME SEVERE CONTAINING WINDS IN EXCESS OF 60 MPH...LARGE HAIL AND POSSIBLY EVEN A WEAK TORNADO. A TORNADO WATCH IS IN EFFECT FOR THOSE COUNTIES UNTIL 9 PM. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SCATTERED THUNDERSTORMS WILL BE POSSIBLE ON THURSDAY...WITH A FEW THUNDERSTORMS BECOME STRONG OR SEVERE. THUNDERSTORMS WILL RETURN TO THE AREA AGAIN ON MONDAY AND TUESDAY AFTER A DRYING TREND THIS WEEKEND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS EXPECTED THIS AFTERNOON AND THIS EVENING. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE NEZ002-003-019>021-054-055-095-096-071100- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX- 326 PM MDT WED JUN 6 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE. .DAY ONE...THIS AFTERNOON AND TONIGHT SHOWERS AND THUNDERSTORMS WILL BECOME NUMEROUS ACROSS THE WESTERN NEBRASKA PANHANDLE THIS AFTERNOON AND THIS EVENING. THESE THUNDERSTORMS WILL HAVE THE POTENTIAL TO BECOME SEVERE CONTAINING WINDS IN EXCESS OF 60 MPH...LARGE HAIL AND EVEN A FEW TORNADOES. A TORNADO WATCH IS IN EFFECT FOR THE WESTERN NEBRASKA PANHANDLE UNTIL 9 PM. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SCATTERED THUNDERSTORMS WILL BE POSSIBLE ON THURSDAY...WITH A FEW THUNDERSTORMS BECOMING STRONG OR SEVERE IN THE AFTERNOON. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS EXPECTED THIS AFTERNOON AND THIS EVENING. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
438 PM MDT WED JUN 06 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0435 PM HAIL BURNS 41.19N 104.36W
06/06/2012 M0.88 INCH LARAMIE WY TRAINED SPOTTER
UP TO NICKEL SIZED DIAMETER HAIL.
&&
MWEILANDPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
445 PM MDT WED JUN 06 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0439 PM HAIL 2 S BURNS 41.16N 104.36W
06/06/2012 M1.00 INCH LARAMIE WY STORM CHASER
OBSERVED ALONG INTERSTATE 80 JUST SOUTH OF BURNS
&&
TTRUDELSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 508 PM MDT WED JUN 6 2012 WYZ106-115-116-062345- CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY WY-LARAMIE VALLEY WY-SOUTH LARAMIE RANGE WY- 508 PM MDT WED JUN 6 2012 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL ALBANY COUNTY UNTIL 545 PM MDT... AT 503 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 6 MILES SOUTHWEST OF BALDY PEAK...OR 11 MILES NORTH OF LARAMIE...MOVING NORTH 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... BALDY PEAK... 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 4183 10564 4179 10531 4140 10544 4142 10568 TIME...MOT...LOC 2307Z 189DEG 17KT 4148 10555 FINCH
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
511 PM MDT WED JUN 06 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0508 PM HAIL 20 E CHEYENNE 41.14N 104.41W
06/06/2012 M1.00 INCH LARAMIE WY TRAINED SPOTTER
ONE INCH HAIL REPORTED IN HILLSDALE IN LARAMIE COUNTY.
&&
TTRUDELPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
529 PM MDT WED JUN 06 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0508 PM FLASH FLOOD STEGALL 41.87N 103.95W
06/06/2012 SCOTTS BLUFF NE STORM CHASER
REPORT OF WATER OVER COUNTY ROAD 92 AROUND STEGALL
&&
TTRUDELPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE CHEYENNE WY
530 PM MDT WED JUN 06 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0435 PM HAIL BURNS 41.19N 104.36W
06/06/2012 M0.88 INCH LARAMIE WY TRAINED SPOTTER
UP TO NICKEL SIZED DIAMETER HAIL.
0439 PM HAIL 2 S BURNS 41.16N 104.36W
06/06/2012 M1.00 INCH LARAMIE WY STORM CHASER
OBSERVED ALONG INTERSTATE 80 JUST SOUTH OF BURNS
0508 PM HAIL 20 E CHEYENNE 41.14N 104.41W
06/06/2012 M1.00 INCH LARAMIE WY TRAINED SPOTTER
ONE INCH HAIL REPORTED IN HILLSDALE IN LARAMIE COUNTY.
0530 PM FLASH FLOOD STEGALL 41.87N 103.95W
06/06/2012 SCOTTS BLUFF NE STORM CHASER
REPORT OF WATER OVER COUNTY ROAD 92 AROUND STEGALL
&&
TTRUDELThe Cheyenne radar (KCYS), 108 km away, was scanning. The volume nearest the first event began at 23:30 UTC.
2 flash flood, 2 heavy rain. Local standard time, as filed.
High water over County Road 92 around Stegall was reported by a storm chaser.
Nearly two inches of rain fell in a 45-minute period just south of Stegall.
Two inches of rain fell in a 45-minute period at Stegall.
NEDOR officials reported one to two feet of standing water in and around the intersection of County Road M and Stegall Road south of Stegall.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nebraska in 2012Every state in 2012This day in weather historyWarnings in Nebraska, June 2012
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: 377315, 377316, 377317, 377320.