A lone thunderstorm produced some hail in and around Cheyenne, WY.
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 lone thunderstorm produced some hail in and around Cheyenne, WY.
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 4, 12:59 PM MST, 4 hours 28 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 159 PM MDT THU JUN 4 2009 .SHORT TERM...TONIGHT THROUGH SATURDAY... STORMS FIRING NOW PRIMARILY OVER THE COLORADO MTNS WITH MORE ISOLATED ACTIVITY OVER THE SE WY MTNS. LATEST ANALYSIS SHOWS SOME MODEST INSTABILITY OVER THE AREA WITH LIS AND CAPES SIMILAR TO YESTERDAY. UPPER WINDS STRONGER BUT MORE UNIDIRECTIONAL AND WITH WEAK LOW LEVEL WINDS SEVERE THREAT SOMEWHAT INCREASED BUT NOT TOO IMPRESSIVE. ALSO MUCH OF THE PANHANDLE IS FAIRLY WELL CAPPED NOW AND MAY NOT BREAK IT WITH LACK OF ANY BOUNDARIES THUS CONVECTION MAY HAVE A HARD TIME MAKING IT THERE. STORMS THAT DO FORM WILL MOVE ESE THUS SOUTHERN PORTION OF CWA HAS BEST CHANCE FOR STORMS INTO EARLY THIS EVENING WITH ACTIVITY EXPECTED TO DIMINISH DURING THE EVENING WITH LOSS OF HEATING. FRIDAY LOOKS TO BE A BETTER DAY FOR STRONG STORMS PARTICULARLY OVER THE SOUTHERN CWA AS SURFACE COLD FRONT MOVES SOUTH ACROSS THE CWA FRIDAY MORNING AND INCREASES LOW LEVEL EASTERLY WINDS/UPSLOPE RESULTING IN BETTER SHEAR VALUES. BEST CHANCES WILL BE CLOSE TO THE COLORADO BORDER. NOT MUCH COOLING EXPECTED WITH THE FRONT. MEANWHILE UPPER RIDGE AXIS WILL SHIFT ACROSS THE REGION FRIDAY WITH UPPER FLOW BACKING TO SW FRIDAY NIGHT AND SATURDAY. THIS ALONG WITH DEPARTING SURFACE HIGH SHOULD ALLOW FOR SURFACE BOUNDARY TO PULL BACK EAST SATURDAY AND LIKELY SERVE AS A FOCUSING MECHANISM FOR CONVECTION SATURDAY AFTERNOON. TEMPERATURES WARMER SATURDAY IN RETURN FLOW. .LONG TERM...SATURDAY NIGHT THROUGH THURSDAY... GENERALLY UNSETTLED CONDITIONS WITH COOLER THAN NORMAL TEMPERATURES THROUGH THE LONG TERM PERIOD. THE BEST CHANCES FOR PRECIPITATION APPEAR TO BE DURING THE SUNDAY AND SUNDAY NIGHT PERIOD AS AN UPPER LEVEL LOW EJECTS OUT OF THE SOUTHWEST UNITED STATES. ACCOMPANYING THE UPPER LEVEL SYSTEM WILL BE A COLD FRONT MOVING SOUTH ACROSS THE AREA SUNDAY. THIS WILL RESULT IN SURFACE HIGH PRESSURE...DRY AND COOLER CONDITIONS FOR EARLY NEXT WEEK. MONDAY WILL BE 10 TO 15 DEGREES COOLER THAN NORMAL...WITH A WARMING TREND BACK TO JUST A FEW DEGREES BELOW NORMAL BY MIDWEEK. UPPER LEVEL WINDS ARE EXPECTED TO BACK TO A SOUTHWEST DIRECTION BY THE MIDDLE OF NEXT WEEK CREATING INCREASED CHANCES FOR AFTERNOON AND EVENING THUNDERSTORMS. && .AVIATION... BRIEF LOCAL MVFR CONDITIONS POSSIBLE MAINLY CLOSE TO THE WY MTNS INTO THIS EVENING IN WDLY SCTD SHOWERS/TSTRMS OTHERWISE VFR EXPECTED THROUGH FRIDAY MORNING. MORE WIDESPREAD TSTRMS POSSIBLE FRIDAY AFTERNOON MAINLY CLOSE TO THE COLORADO BORDER. && .FIRE WEATHER... NO FIRE WEATHER CONCERNS AT THIS TIME. && .HYDROLOGY... THE NORTH PLATTE RIVER AT SARATOGA AND AT SINCLAIR...THE ENCAMPMENT RIVER AT RIVERSIDE...AND THE LARAMIE RIVER AT LARAMIE ARE CONTINUING TO FLOW NEAR BANK FULL LEVELS DUE TO THE RECENT PRECIPITATION ACROSS THE AREA. FLOWS ON THESE RIVERS ARE EXPECTED TO GRADUALLY DECREASE THROUGH THE END OF THE WEEK...ASSUMING NO SIGNIFICANT PRECIPITATION IS ADDED TO THESE BASINS LATE THIS WEEK. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...NONE. NE...NONE. && SHORT TERM/AVIATION/FIRE...RE LONG TERM/HYDROLOGY...CARPENTER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 214 PM MDT THU JUN 4 2009 NEZ054-WYZ059-064-066>070-051045- KIMBALL-CONVERSE-NORTH LARAMIE RANGE-LARAMIE RANGE-PLATTE-GOSHEN- CHEYENNE FOOTHILLS-PINE BLUFFS- 214 PM MDT THU JUN 4 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE AND SOUTHEAST WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS OVER AND NEAR THE LARAMIE AND SNOWY RANGES EARLY THIS AFTERNOON WILL MOVE GENERALLY SOUTHEAST OVER THE ADJACENT PLAINS INTO EARLY THIS EVENING. SOMEWHAT BETTER ATMOSPHERIC WIND PATTERNS COULD ALLOW A FEW OF THE STORMS TO BECOME STRONG WITH HAIL AND GUSTY WINDS THE MAIN THREAT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY SCATTERED AFTERNOON AND EVENING THUNDERSTORMS WILL BE POSSIBLE OVER SOUTHEAST WYOMING AND THE WESTERN NEBRASKA PANHANDLE AGAIN ON FRIDAY AND SATURDAY. STRONG STORMS ARE POSSIBLE FRIDAY AFTERNOON ESPECIALLY CLOSE TO THE COLORADO BORDER. THERE WILL BE MUCH LESS THUNDERSTORM ACTIVITY ON MONDAY AND TUESDAY AND ANY STORMS THAT FORM WILL NOT BE AS STRONG. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED AT THIS TIME. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE NEZ001>003-019>021-055-WYZ060>063-065-051045- SIOUX-DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-CHEYENNE- NIOBRARA-SOUTHWEST CARBON-NORTH CARBON-SNOWY RANGE-LARAMIE VALLEY- 214 PM MDT THU JUN 4 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE AND SOUTHEAST WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT ISOLATED THUNDERSTORMS ARE POSSIBLE LATE THIS AFTERNOON INTO THIS EVENING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY WIDELY SCATTERED AFTERNOON AND EVENING THUNDERSTORMS ARE EXPECTED MAINLY FRIDAY THROUGH SUNDAY AND THEN AGAIN ON WEDNESDAY. A FEW STRONG STORMS ARE POSSIBLE OVER THE SOUTHERN PANHANDLE FRIDAY AFTERNOON AND EVENING. .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
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
430 PM MDT THU JUN 04 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0429 PM HAIL 14 NW ALBIN 41.56N 104.29W
06/04/2009 M0.25 INCH LARAMIE WY TRAINED SPOTTER
SOME LARGER HAIL. 50 FT VISIBILITY, STRONG WINDS BLOWING
LEAVES OFF OF TREES.
&&
BCHAPMANPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
445 PM MDT THU JUN 04 2009
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0443 PM HAIL 14 NW ALBIN 41.56N 104.29W
06/04/2009 M0.25 INCH LARAMIE WY TRAINED SPOTTER
SOME HAIL WAS A BIT LARGER. VERY HEAVY RAIN WITH SOME IN
THE HOUSE.
&&
BCHAPMANSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 452 PM MDT THU JUN 4 2009 WYZ067-042330- PLATTE- 452 PM MDT THU JUN 4 2009 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN PLATTE COUNTY UNTIL 530 PM MDT... AT 450 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR SIBLEY PEAK...OR 26 MILES NORTH OF WHEATLAND...MOVING SOUTHEAST AT 25 MPH. SMALL HAIL...AND WINDS AROUND 50 MPH ARE EXPECTED WITH THIS STORM. THIS INCLUDES INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 98 AND 109. RJM
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 501 PM MDT THU JUN 4 2009 NEZ020-054-WYZ070-050000- BANNER-KIMBALL-PINE BLUFFS- 501 PM MDT THU JUN 4 2009 ...SIGNIFICANT WEATHER ADVISORY FOR EASTERN LARAMIE...SOUTHWESTERN BANNER AND WESTERN KIMBALL COUNTIES UNTIL 600 PM MDT... AT 500 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR GUN BARREL...OR 34 MILES NORTHEAST OF CHEYENNE...MOVING SOUTHEAST AT 27 MPH. PENNY SIZE HAIL...AND WINDS AROUND 50 MPH ARE EXPECTED WITH THIS STORM. THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 2 AND 20. KMD
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 534 PM MDT THU JUN 4 2009 WYZ070-050000- PINE BLUFFS- 534 PM MDT THU JUN 4 2009 ...SIGNIFICANT WEATHER ADVISORY FOR EASTERN LARAMIE COUNTY UNTIL 600 PM MDT... AT 531 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 9 MILES NORTHWEST OF PINE BLUFFS...OR 27 MILES WEST OF KIMBALL...MOVING SOUTHEAST AT 28 MPH. TRAINED SPOTTERS REPORTED A BRIEF LAND SPOUT WITH THIS STORM 8 MILES NORTHEAST OF BURNS AT AROUND 530 PM. WINDS AROUND 50 MPH ARE EXPECTED WITH THIS STORM. THIS INCLUDES INTERSTATE 80 IN WYOMING BETWEEN MILE MARKERS 394 AND 401. KMD
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 555 PM MDT THU JUN 4 2009 WYZ066-069-070-050045- CHEYENNE FOOTHILLS-LARAMIE RANGE-PINE BLUFFS- 555 PM MDT THU JUN 4 2009 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL LARAMIE COUNTY UNTIL 645 PM MDT... AT 553 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 7 MILES WEST OF WHITAKER...OR 23 MILES NORTHWEST OF CHEYENNE...MOVING SOUTHEAST AT 27 MPH. SMALL HAIL...AND WINDS AROUND 50 MPH ARE EXPECTED WITH THIS STORM. THIS INCLUDES INTERSTATE 80 IN WYOMING BETWEEN MILE MARKERS 364 AND 374. THIS INCLUDES INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 13 AND 37. KMD
The Cheyenne radar (KCYS), 6 km away, was scanning. The volume nearest the first event began at 00:28 UTC.
1 hail. Local standard time, as filed.
Hail from 3/4 to 1 inch in diameter reported over the area.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2009Every state in 2009This day in weather historyWarnings in Wyoming, June 2009
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: 166955.