Thunderstorm Wind, Laramie
- When
- June 30, 2:39 PM MST
- Where
- Laramie County, (Cys)cheyenne Airport
- Measured
- 50 kt (58 mph) measured gust
- Reported by
- ASOS
- Coordinates
- 41.150, -104.820
The ASOS at the airport measured a wind gust of 57 mph.
Damaging Winds in Wyoming, June 30, 2011
Thunderstorms developed and produced gusty straight line winds across southeast Wyoming.
Where it happened
Every event with a place to put it. Tap one for its entry below.
- Tornadoes
- Tropical storms and surge
- Floods
- Wind
- Hail
- Winter weather
- Heat and drought
- Cold
- Fire, smoke and dust
- Marine and coastal
- Other
The toll
- Deaths
- 0
- Injuries
- 0
- Property damage
- None recorded
- Crop damage
- None recorded
- Events
- 3
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.
What happened
The episode as NWS CYS wrote it up.
Thunderstorms developed and produced gusty straight line winds across southeast Wyoming.
What forecasters said that day
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 30, 1:06 PM MST, 1 hour 33 minutes earlier.
Area forecast discussion, Jun 30, 1:06 PM MST, 1 hour 33 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 206 PM THU JUN 30 2011 .SHORT TERM...TONIGHT THROUGH SATURDAY... THUNDERSTORMS CONTINUE TO DEVELOP EARLY THIS AFTERNOON OVER THE SOUTHEAST PART OF WYOMING AND NORTHERN COLORADO. MANY OF THE STORMS WILL BECOME STRONG OR SEVERE THROUGH THE REST OF THE AFTERNOON AND EARLY TONIGHT AS THE ACTIVITY SPREAD EAST. MAIN THREAT FROM THE STORMS WILL BE STRONG WIND GUSTS...LARGE HAIL AND HEAVY RAINFALL. SO FAR TODAY TO THE WEST OF THE LARAMIE RANGE...SMALL HAIL...WIND GUSTS TO 40 MPH AND A PERIOD OF HEAVY RAIN HAS BEEN NOTED. DEEPER MOISTURE...GREATER INSTABILITY AND LARGER CAPE VALUES ARE OVER THE EAST PART OF THE CWA. THAT IS WHERE THE POTENTIAL FOR LARGER HAIL EXISTS. ALL OF THE ACTIVITY IS AHEAD OF A POTENT SHORTWAVE TROUGH CURRENTLY OVER EXTREME EAST CENTRAL UTAH. THAT FEATURE WILL MOVE ACROSS THE CWA TONIGHT. AHEAD OF THE SHORTWAVE TROUGH IS A 250 MB JET SEGMENT WHICH HAS BEEN AIDING STORM DEVELOPMENT OVER SOUTHEAST WYOMING. MODELS DIFFER WITH THE TIMING OF THE SHORTWAVE TROUGH WITH THE NAM BEING MUCH SLOWER. AT THIS TIME WILL FOLLOW MORE CLOSELY THE 00Z ECMWF TIMING WHICH MOVES THE FEATURE JUST EAST OF THE CWA AT 12Z FRIDAY. SHOWERS AND THUNDERSTORMS WILL CONTINUE AHEAD OF THE SHORTWAVE TROUGH TONIGHT. LOW CLOUDS AND WILL BE POSSIBLE LATER TONIGHT AND THROUGH MID MORNING FRIDAY OVER THE NORTHERN PANHANDLE WHERE THE SURFACE DEW POINTS WILL BE HIGHEST. AN ASSOCIATED SURFACE COLD FRONT WILL MOVE ACROSS THE CWA TONIGHT AND IS PRECEEDED BY A PRE FRONTAL TROUGH. BEHIND THE FRONT FOR FRIDAY WILL BE COOLER AND MORE STABLE AIR AS SURFACE HIGH PRESSURE BUILDS OVER THE REGION. FOR SATURDAY THE FLOW ALOFT IS MORE WESTERLY WITH A WEAK SHORTWAVE TROUGH MOVING ACROSS THE CWA. THE SURFACE HIGH WILL BE OVER THE PLAINS WITH SOUTHEAST RETURN FLOW INCREASING THE LOW LEVEL MOISTURE. PRECIPITABLE WATER VALUES INCREASE TO AN INCH OVER THE PANHANDLE ON SATURDAY. WILL INCREASE POPS FOR SATURDAY OVER MAINLY THE EASTERN PART OF THE CWA AND WARM TEMPERATURES. SPC HAS PLACED THE RISK OVER SEVERE OVER A NARROW PART OF SOUTHEAST WYOMING SATURDAY AFTERNOON AND LOOKS REASONABLE AT THIS TIME. .LONG TERM... LINGERING CONVECTION EXPECTED TO END SATURDAY EVENING WITH MAINLY DRY WEATHER EXPECTED SUNDAY AND MONDAY AS UPPER HIGH BUILDS OVER THE CWA WITH ASSOCIATED HEIGHT RISES. TEMPERATURES QUITE WARM SUNDAY AND INDEPENDENCE DAY WITH MAXS AROUND 100 POSSIBLE OVER THE PANHANDLE...ESPECIALLY MONDAY. INCREASE IN MOISTURE THEN EXPECTED OVER THE REGION BY MIDWEEK WHICH WILL BRING SOME MINOR COOLING AS WELL AS AN INCREASE IN MAINLY LATE DAY CONVECTION...BEGINNING TUESDAY THEN SOMEWHAT MORE SO WEDNESDAY AND THURSDAY. && .AVIATION...00Z TAF ISSUANCE... MAINLY VFR CONDITIONS EXPECTED TONIGHT THROUGH FRIDAY OUTSIDE OF SCTD TSRAS TONIGHT WHERE BRIEF MVFR CIGS/VSBYS POSSIBLE. BRIEF GUSTY SFC WINDS ALSO POSSIBLE VCTY ANY CBS. && .FIRE WEATHER... THUNDERSTORMS WILL AFFECT MOST OF THE CWA THROUGH TONIGHT WITH WETTING RAIN LIKELY. BEHIND THE COLD FRONT FOR FRIDAY WILL BE COOLER TEMPERATURES...A MUCH LOWER CHANCE OF LATE DAY STORMS AND GUSTY NORTHWEST OR NORTH WINDS. TEMPERATURES THEN WARM FOR THE WEEKEND AND MINIMUM RELATIVE HUMIDITY VALUES OVER THE LOWER ELEVATIONS DROP TO BETWEEN 15 AND 30 PERCENT. SOME LATE DAY THUNDERSTORMS WILL AFFECT THE EAST PART OF THE CWA SATURDAY. MID AND UPPER LEVEL MOISTURE RETURNS TO THE CWA MONDAY AND PERSISTS THROUGH THE MID PART OF NEXT WEEK. THE ADDITIONAL MOISUTRE WILL HELP TO PRODUCE LATE DAY SHOWERS AND THUDNERSTORMS. A COLD FRONT WILL MOVE ACROSS THE CWA MONDAY AFTERNOON AND MONDAY EVENING. && .HYDROLOGY... FLOOD WARNINGS REMAIN IN EFFECT FOR SARATOGA...SINCLAIR...HENRY AND MITCHELL ALONG THE NORTH PLATTE RIVER AS WELL AS THE LARAMIE RIVER NEAR LARAMIE AND THE ENCAMPMENT RIVER AT ENCAMPMENT. RIVER LEVELS WILL REMAIN STEADY OR SLOWLY FALL THROUGH EARLY NEXT WEEK ALONG THE LOWER NORTH PLATTE RIVER...WITH DIURNAL RISES AND FALLS MIXED IN WITH A GENERAL DECREASING TREND FURTHER WEST. VERY WARM TEMPERATURES ARE FORECAST OVER THE WEEKEND AND EARLY NEXT WEEK WHICH WILL RESULT IN INCREASED MOUNTAIN SNOW MELT. HOWEVER...WITH MOST OF THE SNOW PACK BELOW 9500 FEET MSL IN THE MOUNTAINS ALREADY MELTED... DO NOT ANTICIPATE ANY SIGNIFICANT RISES THIS WEEK. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...NONE. NE...NONE. && WEILAND/EMANUEL
Hazardous weather outlook, Jun 30, 11:32 AM MST, 3 hours 7 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 1232 PM MDT THU JUN 30 2011 WYZ101>119-011045- 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- 1232 PM MDT THU JUN 30 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL WYOMING... SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT THUNDERSTORMS WILL CONTINUE TO DEVELOP AND MOVE TO THE NORTHEAST AND SPREAD OVER THE REST OF SOUTHEAST WYOMING BY MID AFTERNOON. SOME OF THE THUNDERSTORMS WILL PRODUCE HAIL TO ONE INCH IN DIAMETER...WIND GUSTS TO 60 MPH AND HEAVY RAINFALL. THE THUNDERSTORMS WILL END OVER SOUTHEAST WYOMING BY LATE THIS EVENING. A SEVERE THUNDERSTORM WATCH IS IN EFFECT UNTIL 9 PM. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY ISOLATED STRONG STORMS MAY DEVELOP MAINLY NORTH OF A GLENDO TO TORRINGTON LINE ON FRIDAY. THERE IS ALSO A CHANCE OF THUNDERSTORMS ON SATURDAY AND EARLY NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THIS AFTERNOON AND EVENING. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE NEZ002-003-019>021-054-055-095-096-011045- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX- 1232 PM MDT THU JUN 30 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE. .DAY ONE...THIS AFTERNOON AND TONIGHT SCATTERED THUNDERSTORMS MAY DEVELOP OR MOVE INTO THE NEBRASKA PANHANDLE BY LATE IN THE AFTERNOON. SOME OF THE STORMS MAY BECOME SEVERE WITH THE MAIN THREATS BEING WIND GUSTS TO 70 MPH...HAIL UP TO ONE AND ONE HALF INCHES IN DIAMETER AND HEAVY RAIN. THE STORMS WILL WEAKEN AND MOVE EAST OF THE PANHANDLE SHORTLY AFTER MIDNIGHT. A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR THE WESTERN NEBRASKA PANHANDLE UNTIL 9 PM. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY ISOLATED STRONG STORMS MAY DEVELOP MAINLY NORTH OF A TORRINGTON TO ALLIANCE LINE ON FRIDAY. THERE IS ALSO A CHANCE OF THUNDERSTORMS ON SATURDAY AND EARLY NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON AND TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE WEILAND
In the hours before
Special weather statement, Jun 30, 12:39 PM MST, 2 hours before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 139 PM MDT THU JUN 30 2011 WYZ107-108-302030- EAST PLATTE COUNTY WY-GOSHEN COUNTY WY- 139 PM MDT THU JUN 30 2011 ...SIGNIFICANT WEATHER ADVISORY FOR EXTREME EASTERN PLATTE AND NORTH CENTRAL GOSHEN COUNTIES UNTIL 230 PM MDT... AT 134 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR FORT LARAMIE NATIONAL HISTORIC SITE...OR 19 MILES NORTHEAST OF WHEATLAND...MOVING NORTHEAST AT 25 MPH. HAIL UP TO A HALF INCH IN DIAMETER AND WIND GUSTS UP TO 55 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN AND FREQUENT DANGEROUS LIGHTNING. THIS STORM WILL BE NEAR... FORT LARAMIE NATIONAL HISTORIC SITE AROUND 145 PM MDT. FORT LARAMIE AROUND 150 PM MDT. HWY 85 AT DRY RAWHIDE CREEK AROUND 220 PM MDT. 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. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. JAMSKI
Local storm report, Jun 30, 1:03 PM MST, 1 hour 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
203 PM MDT THU JUN 30 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0200 PM HAIL 2 E LINGLE 42.14N 104.31W
06/30/2011 E0.25 INCH GOSHEN WY TRAINED SPOTTER
LIGHT RAIN/WINDS
&&
BCHAPMANLocal storm report, Jun 30, 1:07 PM MST, 1 hour 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
207 PM MDT THU JUN 30 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0205 PM HAIL 4 S JAY EM 42.41N 104.36W
06/30/2011 M0.25 INCH GOSHEN WY TRAINED SPOTTER
NOT MUCH HAIL. LOTS OF HVY RAIN.
&&
BCHAPMANLocal storm report, Jun 30, 1:22 PM MST, 1 hour 17 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
222 PM MDT THU JUN 30 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0140 PM TSTM WND GST 13 S GLEN 42.42N 103.58W
06/30/2011 M57 MPH SIOUX NE DEPT OF HIGHWAYS
0150 PM TSTM WND GST DOUGLAS 42.76N 105.39W
06/30/2011 M50 MPH CONVERSE WY ASOS
&&
BCHAPMANSpecial weather statement, Jun 30, 2:04 PM MST, 35 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 304 PM MDT THU JUN 30 2011 WYZ116-117-302145- SOUTH LARAMIE RANGE WY-SOUTH LARAMIE RANGE FOOTHILLS WY- 304 PM MDT THU JUN 30 2011 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN LARAMIE AND SOUTHEASTERN ALBANY COUNTIES UNTIL 400 PM MDT... AT 302 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG WINDS ASSOCIATED WITH A THUNDERSTORM NEAR VIRGINIA DALE...OR 29 MILES SOUTHEAST OF LARAMIE...MOVING NORTHEAST AT 30 MPH. WIND GUSTS OUT OF THE SOUTH OF UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... BUFORD... CRYSTAL LAKE RESERVOIR... GRANITE SPRINGS RESERVOIR... FEDERAL... THIS INCLUDES INTERSTATE 80 IN WYOMING BETWEEN MILE MARKERS 330 AND 350. 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. HAHN
Special weather statement, Jun 30, 2:33 PM MST, 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 333 PM MDT THU JUN 30 2011 NEZ002-095-302200- DAWES NE-NORTH SIOUX NE- 333 PM MDT THU JUN 30 2011 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN SIOUX AND NORTHERN DAWES COUNTIES UNTIL 400 PM MDT... AT 329 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 7 MILES NORTHWEST OF CRAWFORD...OR 25 MILES WEST OF CHADRON...MOVING NORTHEAST AT 50 MPH. HAIL UP TO THE SIZE OF NICKELS AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... AGATE DAM RESERVOIR... WHITNEY LAKE... CHADRON AIRPORT... WHITNEY... 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. HAHN
The radar
The Cheyenne radar (KCYS), 1 km away, was scanning. The volume nearest the first event began at 21:38 UTC.
Event by event
3 thunderstorm wind. Local standard time, as filed.
Thunderstorm Wind, Laramie
- When
- June 30, 2:52 PM MST
- Where
- Laramie County, 10 mi N of Cheyenne
- Measured
- 52 kt (60 mph) estimated gust
- Reported by
- NWS Employee
- Coordinates
- 41.275, -104.820
A NWS employee estimated wind gusts of 60 mph.
Thunderstorm Wind, Platte
- When
- June 30, 4:00 PM MST
- Where
- Platte County, 4 mi N of Wheatland
- Measured
- 52 kt (60 mph) estimated gust
- Reported by
- COOP Observer
- Coordinates
- 42.108, -104.970
A COOP observer estimated wind gusts to 60 mph with heavy rain.
What these are
- Thunderstorm Wind
- Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.
After NWS Directive 10-1605, the rules offices file Storm Data by.
The same day elsewhere
- Damaging Winds in Wisconsin, June 30, 2011
- Hail and Damaging Winds in Illinois, June 30, 2011
- Marine Thunderstorm Winds in South Atlantic Coastal Waters, June 30, 2011
- Debris Flow in Colorado, June 30, 2011
- Tornado and Heavy Rain in Texas, June 30, 2011
- Hail and Damaging Winds in Colorado, June 30, 2011
- Hail and Damaging Winds in Texas, June 30, 2011
- Hail and Damaging Winds in Nebraska, June 30, 2011
- Damaging Winds in South Dakota, June 30, 2011
- Hail and Damaging Winds in Florida, June 30, 2011
- Damaging Winds and Lightning Strike in Georgia, June 30, 2011
- Marine Thunderstorm Winds and Waterspout in Lake Michigan, June 30, 2011
More
Every storm in Wyoming in 2011Every state in 2011This day in weather historyWarnings in Wyoming, June 2011
Sources
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: 306112, 306108, 306119.