A vigorous Pacific low pressure system brought widespread heavy snowfall and northerly winds up to 50 mph as it moved across the central Rockies. Storm total snow accumulations up to two feet were observed across southeast Wyoming.
Every event with a place to put it; 58 filed by county or forecast zone are drawn at its center, in a lighter ring. 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 vigorous Pacific low pressure system brought widespread heavy snowfall and northerly winds up to 50 mph as it moved across the central Rockies. Storm total snow accumulations up to two feet were observed across southeast Wyoming. The combination of falling snow and strong winds produced considerable drifting snow, which resulted in very low visibilities and snow packed roads. Numerous highways, including Interstate 80 from Rawlins to the Nebraska border were closed.
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 Apr 8, 2:50 PM MST, 10 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
350 PM MDT MON APR 8 2013
.SHORT TERM...(THIS EVENING THROUGH TUESDAY)
ISSUED AT 348 PM MDT MON APR 8 2013
SIGNIFICANT EARLY SPRING SNOWSTORM CONTINUES TO TAKE AIM ON THE
REGION FOR TONIGHT AND TUESDAY. EARLY AFTERNOON SATELLITE PIX
PLACE UPPER LOW CENTER OVER THE SW CORNER OF UTAH. SFC REFLECTION
HAS THE 989MB SFC LOW FURTHER EAST ALONG THE UTAH/ARIZONA
STATELINE. SFC FRONT EXTENDS NORTH FROM THIS SFC LOW THRU UTAH
BEFORE TURNING EAST NR THE I80 CORRIDOR ACROSS SOUTHERN WYOMING
AND THE SOUTHERN NEBRASKA PANHANDLE. CONVECTION CONTINUES TO
STRENGTHEN IN THE WARM SECTOR SOUTH OF THIS BOUNDARY WITHIN AN
AREA OF 500 J/KG OF SBCAPE BASED ON SPC MESOANALYSIS. CONVECTION
WILL CONTINUE TO EXPAND ACROSS LARAMIE COUNTY AND SOUTHERN
NEBRASKA PANHANDLE THROUGH THE EARLY EVENING HOURS. SUFFICIENT
DIRECTIONAL AND SPEED SHEAR COUPLED WITH MODEST INSTABILITY WOULD
SUGGEST THAT A FEW OF THESE THUNDERSTORMS MAY CONTAIN SMALL HAIL
AND GUSTY WINDS FOR THESE AREAS.
12Z MODELS CONTINUE TO SHOW AN IMPRESSIVE AREA OF SATURATED
ISENTROPIC ASCENT LIFTING NORTH ACROSS MOST OF THE CWA BEGINNING
TONIGHT AND CONTINUING INTO TUESDAY. H3 JET STRUCTURE WILL PLACE THE
CWFA BENEATH THE FAVORABLE LFQ AS THE JET STREAKS ROUNDS THE BASE OF
THE TROUGH LATER TONIGHT AS WELL. ALL THIS AS LLVL COLD AIR MASS
DEEPENS AND TURNS WINDS NORTHEASTERLY AS THE SFC LOW MOVES ACROSS
COLORADO TONIGHT AND DURING THE DAY ON TUESDAY. BUFKIT SOUNDINGS
SHOW STRONG OMEGA COLLOCATED WITH A COMPLETELY SATURATED AREA
WITHIN THE DENDRITIC GROWTH ZONE. SNOWFALL RATES WILL INCREASE
THROUGH THE EVENING HOURS AS SNOW LEVELS DESCEND THROUGH 5 KFT.
AFTER MIDNIGHT...SNOWFALL RATES MAY REACH 1 TO 2 INCHES PER HOURS
ACROSS THE AREA AS THE LOW PRESSURE LIFTS NORTHEAST THROUGH THE
CENTRAL ROCKIES. THE OTHER CONCERN IS THE POTENTIAL FOR A
FREEZING RAIN/SLEET MIX ACROSS PORTIONS OF THE SOUTHERN NEBRASKA
PANHANDLE. FORECAST RAOBS AT KSNY SHOW A 2C WARM NOSE BETWEEN
700-800MB OFF BOTH THE NAM AND GFS CENTERED AROUND 06Z. FOR THIS
REASON...EXPECT THAT AREAS OF THE SOUTHERN NEBRASKA PANHANDLE
SHOULD SEE SLIGHTLY TEMPERED SNOWFALL AMOUNTS. OF COURSE...THE
COMBINATION OF THIS WINTRY MIX ALONG WITH THE ANTICIPATION OF
COMPLETE TURN OVER TO SNOW ON TUESDAY AND MODERATE ACCUMULATIONS...
STILL THINK THAT A WINTER STORM WARNING WILL WORK OUT THERE. THESE
CONDITIONS WILL CONTINUE DURING THE DAY ON TUESDAY AS WELL WITH
WIDESPREAD SNOW CONTINUING. THE OTHER MAJOR FACTOR WILL BE THE
VERY STRONG SURFACE WINDS THAT WILL ACCOMPANY THE FALLING SNOW.
NORTHEAST WIND GUSTS IN EXCESS OF 40 MPH DEFINITELY A GOOD BET
TONIGHT AND DURING THE DAY ON TUESDAY. THIS WILL CONTRIBUTE TO
CONSIDERABLE BLOWING AND DRIFTING SNOW ALONG WITH NEAR WHITE-OUT
CONDITIONS LATE TONIGHT AND DURING THE DAY ON TUESDAY. WILL NEED
TO WATCH THIS AS BLIZZARD CONDITIONS WILL CERTAINLY BE A
POSSIBILITY.
AS FOR SNOW AMOUNTS...DID DECREASE THEM SLIGHTLY WITH GENERALLY 8
TO 14 INCHES ACROSS A LARGE PORTION OF THE FORECAST AREA WITH
LOCALLY HIGHER AMOUNTS POSSIBLE IN THE HIGHER TERRAIN AND NEAR THE
PINE RIDGE. AS MENTIONED EARLIER...AREAS OF THE SOUTHERN NEBRASKA
PANHANDLE MAY SEE SLIGHTLY LESSER AMOUNTS ESPECIALLY IF THE
FREEZING RAIN/SLEET MIX MATERIALIZES LATER TONIGHT. AS SUCH...
WOULD EXPECT GENERALLY 5 TO 10 INCHES ACROSS THAT AREA. A SOLID 6
TO 12 INCHES IS EXPECTED WEST OF THE LARAMIE RANGE WITH UP TO 2
FEET POSSIBLE IN THE SNOWY RANGE. AREAS AROUND SARATOGA WILL
LIKELY BE SHADOWED BY THE THE SNOWY RANGE GIVEN THE STRONG
NORTHEASTERLY FLOW AT THE SURFACE. WIDESPREAD PRECIPITATION WILL
KEEP HIGH TEMPERATURES SIGNIFICANTLY COLDER ON TUESDAY...WHERE
MOST PLACES WILL STRUGGLE TO CLIMB ABOVE THE TEENS.
.LONG TERM...(TUESDAY NIGHT THROUGH MONDAY)
ISSUED AT 348 PM MDT MON APR 8 2013
MODELS CONTINUE TO SHOW THE UPPER TROUGH TO SLOWLY MOVE EAST TUESDAY
NIGHT THROUGH WEDNESDAY. SFC HIGH PRESSURE BUILDING SOUTH ACROSS THE
REGION WILL BRING CONTINUED COLD TEMPS TUESDAY NIGHT AND
WEDNESDAY...WITH PERIODS OF LIGHT TO MODERATE SNOW CONTINUING
THROUGH WEDNESDAY MORNING. THE MAIN FOCUS WILL REMAIN OVER THE
EASTERN PLAINS WHERE WRAPAROUND LOW AND MIDLEVEL MOISTURE WILL
LINGER. COULD SEE AN ADDITIONAL 1 TO 4 INCHES OF SNOW ACCUMULATION
THROUGH AROUND NOON ON WEDNESDAY ALONG AND EAST OF THE LARAMIE
RANGE. BLOWING SNOW WILL CONTINUE TO BE A CONCERN WITH GUSTY
NORTHWEST WINDS OF 20 TO 30 MPH AS WELL. THE STORM WILL SLOWLY SHIFT
EAST WEDNESDAY NIGHT WITH SNOW AND WIND ENDING. TEMPERATURES WILL
MODERATE SOME ON THURSDAY...BUT WILL LIKELY NOT WARM TOO MUCH DUE TO
THE FRESH SNOWPACK. ANOTHER CLIPPER SYSTEM WILL MOVE ACROSS THE
FORECAST AREA ON THURSDAY WITH INCREASING CHANCES MAINLY FOR
MOUNTAIN SNOW AND LOWER ELEVATION RAIN SHOWERS THROUGH THURSDAY
EVENING. NORTHWEST FLOW WILL REMAIN ALOFT AND WILL KEEP THE PATTERN
FAIRLY ACTIVE THROUGH THE WEEKEND WITH TEMPERATURES REBOUNDING BACK
NEAR NORMAL VALUES. IN PARTICULAR...SATURDAY NIGHT THROUGH SUNDAY
COULD SEE MORE WIDESPREAD RAIN AND HIGH ELEVATION SNOW SHOWERS
THROUGH THIS TIME AS A STRONGER JET AND COLD FRONT MOVE ACROSS THE
REGION.
&&
.AVIATION...(FOR THE 18Z TAFS THROUGH 18Z TUESDAY MORNING)
ISSUED AT 1236 PM MDT MON APR 8 2013
THE COLD FRONT MAKING ITS WAY SOUTH ACROSS THE FORECAST AREA THIS
MORNING LOOKS TO SLOWLY CROSS THE COLORADO BORDER BETWEEN 18 AND
20Z. WINDS WILL TURN TO THE EAST AND NORTHEAST BEHIND THE
FRONT...AND WILL STEADILY INCREASE. GUSTS OF 30 TO 40KTS ARE
LIKELY THIS EVENING AND CONTINUING THROUGH TUESDAY MORNING. CIGS
WILL STEADILY DROP AS WELL...WITH PRECIPITATION BECOMING
WIDESPREAD THROUGH THIS AFTERNOON. LOOKS TO START AS RAIN ACROSS
MOST AREAS...AND WILL CHANGE TO SNOW QUICKLY WEST OF THE LARAMIE
RANGE...AND THEN GRADUALLY FROM NORTHWEST TO SOUTHEAST ACROSS THE
PLAINS THROUGH THE LATE AFTERNOON AND EVENING. ISOLATED
THUNDERSTORMS ARE POSSIBLE NEAR THE COLORADO BORDER AND SOUTHERN
PANHANDLE LATE THIS AFTERNOON AND EVENING AS WELL. THERE IS
CONCERN FOR FREEZING RAIN IN THE SOUTHERN PANHANDLE INCLUDING KSNY
BETWEEN 03 AND 10Z...BUT SHOULD BECOME ALL SNOW THEREAFTER. SNOW
WILL THEN CONTINUE THROUGH TUESDAY ACROSS ALL SITES...IN ADDITION
TO THE GUSTY WINDS. LOOKING AT IFR TO LIFR CONDITIONS TO CONTINUE
THROUGH TUESDAY IN SNOW AND BLOWING SNOW. THE MOUNTAINS WILL BE
OBSCURED TODAY THROUGH TUESDAY.
&&
.FIRE WEATHER...
ISSUED AT 348 PM MDT MON APR 8 2013
NO FIRE WEATHER CONCERNS AS A SPRING SNOWSTORM PRODUCES ACCUMULATING
SNOW ACROSS THE DISTRICT TONIGHT THROUGH TUESDAY NIGHT. SNOWFALL
ACCUMULATIONS OF 8 TO 15 INCHES WILL BE COMMON ACROSS MUCH OF THE
REGION...WITH LOCALLY UP TO 2 FEET IN THE HIGHER ELEVATIONS. THE
COMBINATION OF VERY STRONG NORTHEASTERLY WINDS AND FALLING SNOW WILL
PRODUCE NEAR WHITE-OUT CONDITIONS AT TIMES. SNOW WILL WIND DOWN
TUESDAY NIGHT...GIVING WAY TO WARMING CONDITIONS THROUGH THE REST OF
THE WEEK.
&&
.CYS WATCHES/WARNINGS/ADVISORIES...
WY...WINTER STORM WARNING UNTIL MIDNIGHT MDT TUESDAY NIGHT FOR
WYZ101>108-110-112-114>119.
WINTER STORM WARNING UNTIL 6 PM MDT TUESDAY FOR WYZ109-111.
WINTER WEATHER ADVISORY UNTIL 6 PM MDT TUESDAY FOR WYZ113.
NE...WINTER STORM WARNING UNTIL MIDNIGHT MDT TUESDAY NIGHT FOR NEZ002-
003-019-095-096.
WINTER STORM WARNING FROM 9 PM THIS EVENING TO MIDNIGHT MDT
TUESDAY NIGHT FOR NEZ020-021-054-055.
&&
SHORT TERM...HAHN
LONG TERM...RJM
AVIATION...RJM
FIRE WEATHER...HAHNHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 1226 PM MDT MON APR 8 2013 WYZ101>119-091830- 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- 1226 PM MDT MON APR 8 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL WYOMING... SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING. .DAY ONE...THIS AFTERNOON AND TONIGHT A PACIFIC UPPER LEVEL STORM WILL INTENSIFY OVER THE GREAT BASIN TODAY BEFORE MOVING TO THE FOUR CORNERS REGION TONIGHT. A STRONG COLD FRONT WILL SURGE SOUTHWARD ACROSS THE AREA TODAY...WITH LOW PRESSURE DEVELOPING OVER SOUTHEAST COLORADO TONIGHT. RAIN AND SNOW SHOWERS WILL DEVELOP AND BECOME NUMEROUS ALONG AND WEST OF THE LARAMIE RANGE BY MIDDAY. ISOLATED THUNDERSTORMS WILL BE POSSIBLE IN AREAS NEAREST THE COLORADO STATELINE. THE SHOWERS WILL CHANGE TO SNOW THIS EVENING WITH THE ARRIVAL OF MUCH COLDER AIR. THE SNOW WILL BE HEAVY AT TIMES WITH SEVERAL INCHES POSSIBLE. GUSTY NORTHEAST WINDS OF 35 TO 45 MPH WILL CREATE CONSIDERABLE BLOWING AND DRIFTING SNOW WITH VERY LOW VISIBILITIES AND ICY SNOW-PACKED ROADS. REFER TO THE LATEST WINTER STORM WARNING AND WINTER WEATHER ADVISORY FOR DETAILS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THE SPRING SNOWSTORM WILL SLOWLY MOVE NORTHEAST FROM COLORADO INTO SOUTH DAKOTA AND NEBRASKA TUESDAY THROUGH WEDNESDAY. MODERATE TO HEAVY SNOWFALL AND GUSTY NORTH TO NORTHEAST WINDS WILL CONTINUE TUESDAY...GRADUALLY TAPERING OFF TUESDAY NIGHT AND WEDNESDAY. THE COMBINATION OF COLD TEMPERATURES AND GUSTY WINDS WILL RESULT IN WIND CHILLS OF 0 TO 10 BELOW. AN UNSETTLED WEATHER PATTERN WILL CONTINUE FOR THE END OF THE WEEK AND WEEKEND AS A SERIES OF UPPER LEVEL DISTURBANCES MOVE ACROSS THE AREA BRINGING CHANCES FOR SHOWERS. TEMPERATURES WILL SLOWLY MODERATE TO NORMAL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT...HOWEVER REPORTS OF SNOWFALL WILL BE APPRECIATED. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE NEZ002-003-019>021-054-055-095-096-091830- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX- 1226 PM MDT MON APR 8 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE. .DAY ONE...THIS AFTERNOON AND TONIGHT A PACIFIC UPPER LEVEL STORM WILL INTENSIFY OVER THE GREAT BASIN TODAY BEFORE MOVING TO THE FOUR CORNERS REGION TONIGHT. A STRONG COLD FRONT WILL SURGE SOUTHWARD ACROSS THE AREA TODAY...WITH LOW PRESSURE DEVELOPING OVER SOUTHEAST COLORADO TONIGHT. SHOWERS AND WIDELY SCATTERED THUNDERSTORMS WILL DEVELOP AHEAD OF THE FRONT THIS AFTERNOON IN AREAS NEAREST THE COLORADO STATELINE. A FEW STRONG STORMS WITH GUSTY WINDS AND SMALL HAIL WILL BE POSSIBLE OVER THE SOUTHERN NEBRASKA PANHANDLE. THE SHOWERS WILL CHANGE TO SNOW THIS EVENING WITH THE ARRIVAL OF MUCH COLDER AIR. THE SNOW WILL BE HEAVY AT TIMES WITH SEVERAL INCHES POSSIBLE. GUSTY NORTHEAST WINDS OF 35 TO 50 MPH WILL CREATE CONSIDERABLE BLOWING AND DRIFTING SNOW WITH VERY LOW VISIBILITIES AND ICY SNOW-PACKED ROADS. REFER TO THE LATEST WINTER STORM WATCH FOR DETAILS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THE SPRING SNOWSTORM WILL SLOWLY MOVE NORTHEAST FROM COLORADO INTO SOUTH DAKOTA AND NEBRASKA TUESDAY THROUGH WEDNESDAY. MODERATE TO HEAVY SNOWFALL AND GUSTY NORTH TO NORTHEAST WINDS WILL CONTINUE TUESDAY...GRADUALLY TAPERING OFF TUESDAY NIGHT AND WEDNESDAY. THE COMBINATION OF COLD TEMPERATURES AND GUSTY WINDS WILL RESULT IN WIND CHILLS OF 0 TO 10 BELOW. AN UNSETTLED WEATHER PATTERN WILL CONTINUE FOR THE END OF THE WEEK AND WEEKEND AS A SERIES OF UPPER LEVEL DISTURBANCES MOVE ACROSS THE AREA BRINGING CHANCES FOR SHOWERS. TEMPERATURES WILL SLOWLY MODERATE TO NORMAL. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY AND TONIGHT...HOWEVER REPORTS OF SNOWFALL WILL BE APPRECIATED. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
235 PM MDT MON APR 8 2013
NEZ054-055-WYZ119-082130-
CHEYENNE NE-EAST LARAMIE COUNTY WY-KIMBALL NE-
235 PM MDT MON APR 8 2013
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN LARAMIE...KIMBALL
AND WESTERN CHEYENNE COUNTIES UNTIL 330 PM MDT...
AT 230 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 6 MILES SOUTHWEST OF
PANORAMA POINT TO PEETZ...AND MOVING NORTHEAST AT 30 MPH.
BRIEF WIND GUSTS UP TO 50 MPH AND PEA SIZED HAIL ARE EXPECTED WITH
THESE STORMS.
LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE...
SIDNEY...
KIMBALL...
LORENZO...
SIDNEY AIRPORT...
PINE BLUFFS...
BROWNSON...
KIMBALL AIRPORT...
POTTER...
OLIVER RESERVOIR...
OLIVER CAMPGROUND...
DIX...
GURLEY...
BUSHNELL...
THIS INCLUDES INTERSTATE 80 IN WYOMING BETWEEN MILE MARKERS 398 AND
402.
THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 1 AND
62.
IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.
&&
LAT...LON 4102 10413 4136 10413 4138 10281 4099 10294
4099 10349
TIME...MOT...LOC 2034Z 226DEG 15KT 4097 10411 4100 10313
MSWSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 304 PM MDT MON APR 8 2013 NEZ020-WYZ117>119-082200- BANNER NE-CENTRAL LARAMIE COUNTY WY-EAST LARAMIE COUNTY WY-SOUTH LARAMIE RANGE FOOTHILLS WY- 304 PM MDT MON APR 8 2013 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN LARAMIE AND EXTREME SOUTHWESTERN BANNER COUNTIES UNTIL 400 PM MDT... AT 259 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 10 MILES NORTHWEST OF CHEYENNE TO 6 MILES SOUTHWEST OF PINE BLUFFS...AND MOVING NORTHEAST AT 30 MPH. BRIEF WIND GUSTS UP TO 50 MPH AND PEA SIZED HAIL ARE EXPECTED WITH THESE STORMS. LOCATIONS NEAR THE PATH OF THESE STORMS INCLUDE... BURNS... WHITAKER... GUN BARREL... ALBIN... THIS INCLUDES INTERSTATE 80 IN WYOMING BETWEEN MILE MARKERS 359 AND 399. THIS INCLUDES INTERSTATE 25 IN WYOMING BETWEEN MILE MARKERS 5 AND 9. IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. && LAT...LON 4146 10487 4144 10405 4101 10414 4102 10488 TIME...MOT...LOC 2102Z 238DEG 20KT 4128 10479 4112 10411 MSW
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
316 PM MDT MON APR 08 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0313 PM HAIL SIDNEY 41.13N 102.97W
04/08/2013 E0.25 INCH CHEYENNE NE TRAINED SPOTTER
&&
MWEILANDSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHEYENNE WY
318 PM MDT MON APR 8 2013
NEZ020-021-054-055-082200-
BANNER NE-CHEYENNE NE-KIMBALL NE-MORRILL NE-
318 PM MDT MON APR 8 2013
...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN MORRILL...EASTERN
KIMBALL...WESTERN CHEYENNE AND SOUTHEASTERN BANNER COUNTIES UNTIL 400
PM MDT...
AT 316 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 11 MILES WEST OF PEETZ...OR 19 MILES SOUTHWEST OF
SIDNEY...MOVING NORTH AT 30 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...
POTTER...
THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 31 AND
45.
IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A
STURDY BUILDING.
&&
LAT...LON 4149 10353 4151 10320 4100 10318 4099 10319
4100 10342 4100 10343
TIME...MOT...LOC 2119Z 175DEG 27KT 4104 10331
MSWPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
319 PM MDT MON APR 08 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0310 PM HAIL BURNS 41.19N 104.36W
04/08/2013 E0.50 INCH LARAMIE WY PUBLIC
&&
HAMMERSPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE CHEYENNE WY 339 PM MDT MON APR 8 2013 NEZ021-055-082215- CHEYENNE NE-MORRILL NE- 339 PM MDT MON APR 8 2013 ...SIGNIFICANT WEATHER ADVISORY FOR SOUTHERN MORRILL AND CENTRAL CHEYENNE COUNTIES UNTIL 415 PM MDT... AT 334 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM NEAR COLTON...MOVING NORTH AT 30 MPH. HAIL UP TO ONE-HALF INCH IN DIAMETER AND WIND GUSTS UP TO 50 MPH ARE EXPECTED WITH THIS STORM...ALONG WITH HEAVY RAIN. LOCATIONS NEAR THE PATH OF THIS STORM INCLUDE... BROWNSON... GURLEY... DALTON... THIS INCLUDES INTERSTATE 80 IN NEBRASKA BETWEEN MILE MARKERS 47 AND 68. IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. HEAVY RAIN IS ALSO LIKELY. DO NOT DRIVE YOUR VEHICLE ON A FLOODED ROADWAY. && LAT...LON 4156 10322 4158 10280 4108 10278 4106 10316 TIME...MOT...LOC 2136Z 166DEG 26KT 4116 10291 MSW
The national radar mosaic for the moment the first event began.
58 winter storm. Local standard time, as filed.
An observer four miles west-southwest of Douglas measured 7.2 inches of snow.
An observer 11 miles northwest of Lost Springs measured 6.5 inches of snow.
Twelve inches of snow was reported in Douglas.
An observer in Bill measured ten inches of snow with three foot drifts.
An observer in Glenrock measured eight inches of snow.
An observer one mile southeast of Douglas measured seven inches of snow.
Twenty inches of snow with four to six foot drifts were reported in Lusk.
An observer in Redbird measured 14 inches of snow.
An observer in Lance Creek measured 16 inches of snow.
An observer 25 miles northwest of Lusk measured 15 inches of snow.
The Windy Peak SNOTEL site (elevation 7900 ft) estimated 13.5 inches of snow.
An observer in Muddy Gap measured eight inches of snow.
An observer in Medicine Bow measured a foot of snow.
An observer 20 miles southwest of Wheatland measured a foot of snow.
An observer five miles south of Guernsey measured a foot of snow.
An observer two miles south of Glendo measured 8.5 inches of snow.
An observer in Wheatland measured eight inches of snow.
An observer six miles northeast of Glendo measured eight inches of snow.
An observer in Chugwater measured nine inches of snow.
An observer in Torrington measured 20 inches of snow with four to six foot drifts.
An observer in Fort Laramie measured a foot of snow.
An observer in Yoder measured 14 inches of snow.
An observer 6.5 miles south-southeast of Yoder measured 19.5 inches of snow.
An observer 9.6 miles south-southeast of Torrington measured 13.5 inches of snow.
Eight inches of snow with two to four foot drifts were reported in Sinclair.
An observer in Rawlins measured eight inches of snow.
Ten inches of snow was reported at Arlington.
Eleven inches of snow was reported at Elk Mountain.
An observer in Baggs measured six inches of snow.
The Divide Peak SNOTEL site (elevation 8880 ft) estimated 20 inches of snow.
The Battle Mountain SNOTEL site (elevation 7440 ft) estimated 14 inches of snow.
The Sandstone Ranger Station SNOTEL site (elevation 8150 ft) estimated 12 inches of snow.
The Webber Springs SNOTEL site (elevation 9250 ft) estimated 12 inches of snow.
An observer in Saratoga measured seven inches of snow.
An observer 14 miles southeast of Saratoga measured eight inches of snow.
The North French Creek SNOTEL site (elevation 10130 ft) estimated 12 inches of snow.
The Medicine Bow SNOTEL site (elevation 10510 ft) estimated 12 inches of snow.
An observer 17 miles west-northwest of Laramie measured six inches of snow.
An observer in Bosler measured 9.5 inches of snow.
An observer four miles southeast of Laramie measured six inches of snow.
An observer in Rock River measured eight inches of snow.
An observer in Laramie measured six inches of snow.
An observer in Buford measured seven inches of snow.
An observer 11 miles northwest of Cheyenne measured 10 inches of snow.
An observer six miles west-northwest of Cheyenne measured 10 inches of snow.
An observer 20 miles west-southwest of FE Warren AFB measured six inches of snow.
An observer two miles east-northeast of Cheyenne measured 10 inches of snow.
Nine inches of snow was measured at the NWSFO in Cheyenne.
An observer 10.7 miles north of Cheyenne measured 12.5 inches of snow.
An observer one mile north-northwest of Cheyenne measured 10 inches of snow.
An observer four miles north-northwest of Cheyenne measured 10 inches of snow.
An observer three miles north-northwest of Cheyenne measured 14.5 inches of snow.
An observer 9.6 miles east of Cheyenne measured 13 inches of snow.
An observer two miles south of Cheyenne measured 12 inches of snow.
An observer 6.5 miles west-northwest of Burns measured 10 inches of snow.
An observer four miles northwest of Carpenter measured six inches of snow.
An observer four miles north-northeast of Carpenter measured eight inches of snow.
An observer in Pine Bluffs measured 15 inches of snow.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Wyoming in 2013Every state in 2013This day in weather historyWarnings in Wyoming, April 2013
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: 438890, 438892, 438893, 438894, 438895, 438896, 438898, 438899, 438900, 438901, 438902, 438903, 438905, 438906, 438907, 438908, 438909, 438910, 438911, 438912, 438913, 438915, 438918, 438922, 438925, 438926, 438927, 438928, 438929, 438930, 438931, 438932, 438933, 438934, 438935, 438936, 438937, 438938, 438939, 438940, and more.