Alert archive / Wyoming / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 12, NWS Cheyenne, WY
NWS Cheyenne, WY issued this severe thunderstorm warning at Jun 8, 2011, 9:37 PM MDT for Converse County, Niobrara County, Wyoming. It was in force for 38 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 8, 2011, 9:37 PM MDT (03:37 UTC)
- Expired
- Jun 8, 2011, 10:15 PM MDT
- In force
- 38 min
- Issued by
- NWS Cheyenne, WY
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Converse County, WY, Niobrara County, WY
The radar
The Rapid City radar (KUDX), 193 km from the middle of the area, began a volume at 03:40 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Rapid City, SD (KUNR), launched 00:00Z, 3.6 hours before the alert went out and 187 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 956 m above ground
- 0-6 km bulk shear
- 62 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 82 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
487
WUUS55 KCYS 090337
SVRCYS
WYC009-027-090415-
/O.NEW.KCYS.SV.W.0012.110609T0337Z-110609T0415Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHEYENNE WY
937 PM MDT WED JUN 8 2011
THE NATIONAL WEATHER SERVICE IN CHEYENNE HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHEASTERN CONVERSE COUNTY IN EAST CENTRAL WYOMING...
EXTREME NORTHWESTERN NIOBRARA COUNTY IN EAST CENTRAL WYOMING...
* UNTIL 1015 PM MDT
* AT 932 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS
STORM WAS LOCATED 9 MILES NORTH OF BILL...OR 40 MILES NORTH OF
DOUGLAS...AND MOVING EAST AT 35 MPH.
* LOCATIONS IMPACTED INCLUDE...
MIDDLE CREEK RESERVOIR...DULL CENTER AND DULL RESERVOIR.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 4334 10465 4317 10534 4344 10545 4351 10518
4351 10474
TIME...MOT...LOC 0337Z 250DEG 30KT 4335 10526
WIND...HAIL <50MPH 1.00IN
$$
RE2 follow-up statements
706
WWUS55 KCYS 090355
SVSCYS
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
955 PM MDT WED JUN 8 2011
WYC009-027-090415-
/O.CON.KCYS.SV.W.0012.000000T0000Z-110609T0415Z/
NIOBRARA WY-CONVERSE WY-
955 PM MDT WED JUN 8 2011
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHEASTERN
CONVERSE AND EXTREME NORTHWESTERN NIOBRARA COUNTIES UNTIL 1015 PM
MDT...
AT 950 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS
STORM WAS LOCATED 6 MILES WEST OF DULL CENTER...OR 49 MILES NORTH OF
DOUGLAS...MOVING EAST NORTHEAST AT 35 MPH.
LOCATIONS IMPACTED INCLUDE...
DULL CENTER AND DULL RESERVOIR.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 4339 10469 4329 10513 4350 10523 4351 10518
4351 10474
TIME...MOT...LOC 0354Z 250DEG 30KT 4344 10504
WIND...HAIL <50MPH 1.00IN
$$
RE862
WWUS55 KCYS 090412
SVSCYS
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
1012 PM MDT WED JUN 8 2011
WYC009-027-090421-
/O.EXP.KCYS.SV.W.0012.000000T0000Z-110609T0415Z/
NIOBRARA WY-CONVERSE WY-
1012 PM MDT WED JUN 8 2011
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN CONVERSE AND
NORTHWESTERN NIOBRARA COUNTIES WILL EXPIRE AT 1015 PM MDT...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA LATE THIS EVENING.
LAT...LON 4339 10469 4329 10513 4350 10523 4351 10518
4351 10474
TIME...MOT...LOC 0411Z 250DEG 30KT 4349 10486
$$What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, 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 this severe thunderstorm warning went out at Jun 8, 2:40 PM MDT, 6 hours 57 minutes earlier.
Area forecast discussion, Jun 8, 2:40 PM MDT, 6 hours 57 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHEYENNE WY 240 PM MDT WED JUN 8 2011 .SHORT TERM...TONIGHT THROUGH FRIDAY... MANY PLACES ALONG AND WEST OF THE LARAMIE RANGE HAVE JUST REACHED THEIR CONVECTIVE TEMPERATURES EARLY THIS AFTERNOON. SHOWERS AND STORMS AS OF 20Z WERE STARTING TO FORM OVER ALBANY COUNTY...WITH ONLY VERY WEAK RETURNS AT THAT TIME ON THE KCYS 88D. MARGINAL INSTABILITY AND CAPE VALUES ARE PRESENT EARLY THIS AFTERNOON ALONG AND WEST OF THE LARAMIE RANGED...WHILE THE AATMOSPHERE FURTHER EAST REMAINS CAPPED. ONLY WEAK DYNAMICS WILL BE OVER THE REGION THROUGH TONIGHT. HOWEVER...BUT EXPECTED INSTABILITY...SHEAR AND MOISTURE WOULD SUPPORT SOME OF THE STRONGER STORMS PRODUCING SMALL HAIL... MODERATE RAINFALL AND WIND GUSTS TO 45 MPH THROUGH THE EVENING MAINLY IN SOUTHEAST WYOMING...ESPECIALLY EAST OF THE LARAMIE RANGE. THE ACTIVITY WILL SPREAD TO THE NORTHEAST AND INTO THE PANHANDLE TONIGHT. THE UPPEE LOW OVER THE PACIFIC NORTHWEST EARLY THIS AFTERNOON WILL MOVE SLOWLY EAST THROUGH THURSDAY NIGHT. BY 00Z FRIDAY...THE UPPER LOW WILL BE OVER WESTERN MONTANA OR NORTHWEST WYOMING. THE FEATURE WILL THEN CONTINUE TO SLOWLY MOVE EAST THROUGH FRIDAY. A SHORTWAVE TROUGH WILL MOVE ACROSS THE CWA ON THURSDAY AS THE UPPER LOW NEARS. SURFACE UPSLOPE WIND FLOW HAS INCREASED SO FAR TODAY AND WILL CONTINUE THROUGH THURSDAY EVENING. THAT UPSLOPE WIND FLOW WILL HELP TO ENABLE LOW CLOUDS AND AREAS OF FOG TO FORM OVER AND EAST OF THE LARAMIE RANGE AFTER 06Z TONIGHT AND PERSIST THROUGH MIDDAY THURSDAY. THE UPSLOPE WIND FLOW WILL ALSO RESULT IN A CONTINUED INCREASE IN LOW LEVEL MOISTURE...A GOOD CHANCE OF SHOWERS AND MAINLY LATE DAY THUNDERSTORMS AND BELOW NORMAL TEMPERATURES. SEVERE WEATHER PARAMETERS AGAIN LOOK MARGINAL FOR THURSDAY AFTERNOON AND EVENING DUE TO THE COOL TEMPERATURES. DRIER AIR WILL SPREAD BACK OVER THE CWA THURSDAY NIGHT AND CONTINUE ON FRIDAY AS WINDS AT THE SURFACE AND ALOFT BECOME WESTERLY. FRIDAY WILL HAVE TEMPERATURES AROUND NORMAL WITH LOW POPS. .LONG TERM...FRIDAY NIGHT THROUGH WEDNESDAY... NAM...GFS AND ECMWF SYNOPTIC PATTERNS ARE SIMILAR...LEADING TO HIGH CONFIDENCE IN THEIR SOLUTIONS. FRIDAY NIGHT...ZONAL FLOW ALOFT. WITH LIMITED LOW AND MID LEVEL MOISTURE...IT LOOKS DRY. SATURDAY...FLOW ALOFT TURNS SOUTHWEST SETTING UP A SURFACE TROUGH FROM LARAMIE TO CHADRON AND AIDING ISOLATED TO SCATTERED AFTERNOON AND EVENING THUNDERSTORMS. SUNDAY...SLIGHT DECREASE IN AFTERNOON AND EVENING THUNDERSTORM COVERAGE WITH LESS LOW AND MID LEVEL MOISTURE. MONDAY...NEXT SHORTWAVE TROUGH ALOFT MOVES ACROSS WYOMING...PRODUCING ANOTHER ROUND OF ISOLATED TO SCATTERED AFTERNOON AND EVENING THUNDERSTORMS. TUESDAY/WEDNESDAY...FLOW ALOFT TURNS NORTHWEST...THOUGH STILL ENOUGH LOW AND MID LEVEL MOISTURE TO PRODUCE ISOLATED TO SCATTERED AFTERNOON AND EVENING THUNDERSTORMS. && .AVIATION...00Z TAF ISSUANCE... ISOLATED TO SCATTERED THUNDERSTORMS DEVELOPING...MAINLY WEST OF A DOUGLAS TO SIDNEY LINE...AND CONTINUING THROUGH THIS EVENING. THUNDERSTORMS PRODUCING MVFR AND MOUNTAIN OBSCURATION. AFTER 06Z...WIDESPREAD LOW CLOUDS AND FOG DEVELOPING...PRODUCING LIFR AND IFR. CEILINGS AND VISIBILITIES IMPROVING TO VFR BETWEEN 12Z AND 18Z...EXCEPT FOR LOCALIZED MVFR. SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS THURSDAY AFTERNOON PRODUCING LOCALIZED MVFR AND TURBULENCE. && .FIRE WEATHER...A STORM SYSTEM MOVING ACROSS THE NORTHERN ROCKIES THROUGH THURSDAY NIGHT WILL HELP TO PRODUCE COOL TEMPERATURES AND A GOOD CHANCE OF SHOWERS AND LATE DAY THUNDERSTORMS THROUGH THAT TIME. WARMER...DRIER AND BREEZY WEATHER WILL RETURN TO THE CWA FRIDAY AND CONTINUE THROUGH EARLY NEXT WEEK. MINIMUM RELATIVE HUMIDITY VALUES OVER THE LOWER ELEVATIONS WILL GENERALLY BE BETWEEN 15 AND 30 PERCENT ON THOSE DAYS AND TEMPERATURES WILL BE JUST ABOVE NORMAL. && .HYDROLOGY...FLOOD WARNINGS REMAIN IN EFFECT FOR MOST RIVERS FLOWING OFF THE SIERRA MADRE AND SNOWY RANGES THROUGH THE WEEKEND. FLOOD WARNINGS ALSO REMAIN IN EFFECT FOR THE LOWER NORTH PLATTE RIVER BETWEEN HENRY AND MITCHELL. TEMPERATURES WILL BE COOLER OVER THE FORECAST AREA THROUGH THURSDAY ALONG WITH A GOOD CHANCE FOR SHOWERS AND LATE DAY THUNDERSTORMS. UP TO ONE HALF INCH OF RAIN IS POSSIBLE EAST OF THE LARAMIE RANGE THROUGH LATE THIS WEEK WITH SMALLER AMOUNTS WEST OF THE LARAMIE RANGE. WARMER AND DRIER CONDITIONS ARE EXPECTED OVER THE REGION FROM FRIDAY THROUGH THE MID PART OF NEXT WEEK AND WILL ONCE AGAIN INCREASE THE SNOW MELT RATES ABOVE 9000 FEET MSL. THERE WILL ALSO BE A SLIGHT CHANCE OF LATE DAY SHOWERS AND THUNDERSTORMS OVER THE CWA DURING THAT TIME. && .CYS WATCHES/WARNINGS/ADVISORIES... WY...NONE. NE...NONE. && WEILAND/RUBIN
Hazardous weather outlook, Jun 8, 9:17 PM MDT, 20 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 917 PM MDT WED JUN 8 2011 NEZ002-003-019>021-054-055-095-096-WYZ101>103-105>108-115>119- 091200- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX-CONVERSE COUNTY LOWER ELEVATIONS- NIOBRARA COUNTY-NORTH LARAMIE RANGE-SHIRLEY BASIN- CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY- EAST PLATTE COUNTY-GOSHEN COUNTY-LARAMIE VALLEY- SOUTH LARAMIE RANGE-SOUTH LARAMIE RANGE FOOTHILLS- CENTRAL LARAMIE COUNTY-EAST LARAMIE COUNTY- 917 PM MDT WED JUN 8 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE...EAST CENTRAL WYOMING...SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING. .DAY ONE...TONIGHT SCATTERED SHOWERS AND THUNDERSTORMS WILL CONTINUE THIS EVENING THEN DIMINISH OVERNIGHT. SOME OF THE THUNDERSTORMS MAY STILL PRODUCE SMALL HAIL...GUSTY WINDS...BRIEF HEAVY RAIN AND FREQUENT LIGHTNING UNTIL AROUND MIDNIGHT. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SHOWERS AND THUNDERSTORMS WILL CONTINUE THURSDAY WITH A FEW STRONG STORMS POSSIBLE DURING THE AFTERNOON AND EARLY EVENING. OTHERWISE... HIGH WATER LEVELS WILL PERSIST ALONG RIVERS ACROSS SOUTHEAST WYOMING AND WESTERN NEBRASKA PANHANDLE MAINLY DUE TO SNOW MELT IN THE MOUNTAINS AND RELEASES FROM UPSTREAM RESERVOIRS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE WYZ104-109>114-091200- FERRIS/SEMINOE/SHIRLEY MOUNTAINS-CENTRAL CARBON COUNTY- NORTH SNOWY RANGE FOOTHILLS-SOUTHWEST CARBON COUNTY- SIERRA MADRE RANGE-UPPER NORTH PLATTE RIVER BASIN-SNOWY RANGE- 917 PM MDT WED JUN 8 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTH CENTRAL WYOMING. .DAY ONE...TONIGHT ISOLATED SHOWERS AND THUNDERSTORMS WILL CONTINUE. NO SEVERE WEATHER IS EXPECTED. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SHOWERS AND THUNDERSTORMS WILL CONTINUE THURSDAY WITH A FEW STRONG STORMS POSSIBLE. HIGH WATER LEVELS WILL PERSIST ACROSS THE UPPER NORTH PLATTE RIVER AND LITTLE SNAKE RIVER DUE TO MOUNTAIN SNOW MELT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE JAMSKI
In the hours before
Special weather statement, Jun 8, 7:12 PM MDT, 2 hours 25 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 712 PM MDT WED JUN 8 2011 WYZ103-106-107-090200- CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY WY-EAST PLATTE COUNTY WY-NORTH LARAMIE RANGE WY- 712 PM MDT WED JUN 8 2011 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN PLATTE COUNTY UNTIL 800 PM MDT... AT 709 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 15 MILES NORTHWEST OF WHEATLAND...MOVING EAST AT 30 MPH. HAIL UP TO THE SIZE OF PENNIES IS EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... I-25 EXIT 84... I-25 EXIT 92... I-25 EXIT 100... THIS INCLUDES INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 84 AND 100. 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 POSSIBLE. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. RE
Special weather statement, Jun 8, 7:19 PM MDT, 2 hours 18 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 719 PM MDT WED JUN 8 2011 WYZ117-118-090230- SOUTH LARAMIE RANGE FOOTHILLS-CENTRAL LARAMIE COUNTY- INCLUDING THE CITIES OF...HORSE CREEK...HARRIMAN...WHITAKER... CHEYENNE 719 PM MDT WED JUN 8 2011 ...SHOWERS AND A FEW THUNDERSTORMS MOVING INTO LARAMIE COUNTY... AN AREA OF SHOWERS AND A FEW THUNDERSTORMS WAS LOCATED OVER THE SOUTHWEST PART OF LARAMIE COUNTY. THEY ARE EXPECTED TO MOVE NORTHEAST AT 30 MPH AND SHOULD PASS OVER OR AROUND THE CITY OF CHEYENNE BY 8 PM. BRIEF HEAVY RAIN...LIGHTNING AND SMALL HAIL ARE POSSIBLE WITH THESE STORMS. RE
Special weather statement, Jun 8, 7:53 PM MDT, 1 hour 44 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 753 PM MDT WED JUN 8 2011 WYZ106-107-090230- CENTRAL LARAMIE RANGE AND SOUTHWEST PLATTE COUNTY WY-EAST PLATTE COUNTY WY- 753 PM MDT WED JUN 8 2011 ...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL PLATTE COUNTY UNTIL 830 PM MDT... AT 750 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR BORDEAUX...OR 12 MILES SOUTH OF WHEATLAND... MOVING NORTHEAST AT 35 MPH. HAIL UP TO THE SIZE OF PENNIES IS EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... BORDEAUX... GRAYROCKS RESERVOIR... I-25 EXIT 65... I-25 EXIT 70... THIS INCLUDES INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 65 AND 73. TORRENTIAL RAIN...WHICH MAY FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES...IS POSSIBLE. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. RE
Special weather statement, Jun 8, 8:18 PM MDT, 1 hour 19 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 818 PM MDT WED JUN 8 2011 WYZ101-090300- CONVERSE COUNTY LOWER ELEVATIONS WY- 818 PM MDT WED JUN 8 2011 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN CONVERSE COUNTY UNTIL 900 PM MDT... AT 813 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 7 MILES NORTH OF BLUE HILL RESERVOIR...OR 24 MILES NORTHEAST OF EVANSVILLE...MOVING NORTHEAST AT 35 MPH. HAIL UP TO THE SIZE OF NICKELS IS EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... MAINLY RURAL AREAS OF NORTHERN CONVERSE COUNTY. 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. RE
Special weather statement, Jun 8, 8:28 PM MDT, 1 hour 9 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 828 PM MDT WED JUN 8 2011 WYZ118-119-090315- CENTRAL LARAMIE COUNTY WY-EAST LARAMIE COUNTY WY- 828 PM MDT WED JUN 8 2011 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN LARAMIE COUNTY UNTIL 915 PM MDT... AT 826 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 11 MILES NORTH NORTHEAST OF CHEYENNE...MOVING NORTHEAST AT 25 MPH. HAIL UP TO THE SIZE OF PENNIES IS EXPECTED WITH THIS STORM. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... HWY 85 AT COUNTY ROAD 222... HWY 85 MM 32... HWY 85 AT HIGHWAY 216... RE
Special weather statement, Jun 8, 8:59 PM MDT, 38 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 859 PM MDT WED JUN 8 2011 WYZ101-090345- CONVERSE COUNTY LOWER ELEVATIONS WY- 859 PM MDT WED JUN 8 2011 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN CONVERSE COUNTY UNTIL 945 PM MDT... AT 854 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 14 MILES NORTHEAST OF SAND CREEK RESERVOIR...OR 33 MILES NORTHWEST OF DOUGLAS...MOVING NORTHEAST AT 30 MPH. HAIL UP TO THE SIZE OF PENNIES IS EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... MAINLY RURAL AREAS OF NORTHERN CONVERSE COUNTY. 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. RE
The office that day
Everything else NWS Cheyenne, WY issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 8, 6:30 PM MDT | Severe Thunderstorm Warning | CYS | Goshen | 17 min |
| Jun 9, 1:43 PM MDT | Severe Thunderstorm Warning | CYS | Niobrara | 23 min |
Nearby
Severe Thunderstorm Warnings in Wyoming, 2011Every severe thunderstorm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.