A low pressure system moved across Colorado and produced heavy snowfall over portions of southeast Wyoming. Storm total accumulations ranged from 6 to 20 inches, highest over the southern Laramie Range.
Every event with a place to put it; 6 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 low pressure system moved across Colorado and produced heavy snowfall over portions of southeast Wyoming. Storm total accumulations ranged from 6 to 20 inches, highest over the southern Laramie Range.
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 30, 10:43 PM MST, 1 hour 17 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHEYENNE WY
1143 PM MDT TUE APR 30 2013
UPDATE ISSUED AT 818 PM MDT TUE APR 30 2013
SNOW WAS FALLING HEAVILY OVER LARAMIE COUNTY AND NEARBY AREAS AS
OF 02Z. SNOWFALL RATES WERE AS HIGH AS 1 INCH PER HOUR WITH SOME
LOCATIONS WEST OF KCYS ALREADY WITH 4 TO 6 INCHES. LATEST
SATELLITE AND RADAR TRENDS SUGGEST THAT THE AREA OF HEAVIER
PRECIPITATION WILL SHIFT SLOWLY EAST TONIGHT AND INTO WEDNESDAY
MORNING. THE BACK EDGE MAY BE NEAR KLAR WHERE THE SNOWFALL AT
THE AIRPORT HAS BEEN LIGHTER IN RECENT HOURS. IN A RECENT UPDATE
HAVE ADJUSTED SNOWFALL AMOUNTS UP IN AREAS OVER AND EAST OF THE
LARAMIE RANGE AND DOWN IN AREAS LIKE KDGW AND KRWL. THE RAIN
OVER MUCH OF THE PANHANDLE AT 02Z WILL SLOWLY CHANGE OVER TO
SNOW BY LATE EVENING.
UPDATE ISSUED AT 622 PM MDT TUE APR 30 2013
RAIN CHANGING OVER TO SNOW EARLY THIS EVENING OVER MUCH OF
SOUTHEAST WYOMING. THE SNOW WAS HEAVY IN PLACES WITH SNOWFALL
RATES OF UP TO AN INCH PER HOUR OVER THE SOUTHERN LARAMIE RANGE...
WESTERN LARAMIE AND WESTERN PLATTE COUNTIES. THE KCYS RADAR
DEPICTS HEAVIER SNOW BANDS OVER SOUTHEAST WYOMING DUE TO THE MID
LEVEL CONVERGENCE AND THE CURRENT RIGHT ENTRANCE REGION OF THE
300 MB JET OVER THE AREA. CLOUD TOPS HAVE COOLED SINCE 23Z OVER
THE CWA. THE PANHANDLE STILL REMAINS IN LIGHT RAIN CURRENTLY AND
WILL CHANGE OVER TO SNOW THROUGH LATE EVENING AS TEMPERATURES
COOL.
STILL LOOKS LIKE THE HEAVIER SNOWFALL WILL BE FOR A 6 TO 10 HOUR
PERIOD AND WILL GRADUALLY SHIFT EAST TONIGHT AND WEDNESDAY
MORNING.
MADE ADJUSTMENTS TO THE TIMING OF THE CHANGEOVER TO SNOW IN A
RECENT UPDATE AND MINOR ADJUSTMENTS TO THE SNOW AMOUNTS FOR
TONIGHT. WILL MONITOR TRENDS BEFORE MAKING ADDITIONAL CHANGES TO
THE SNOW AMOUNTS. PREVIOUSLY ISSUED HIGHLIGHTS LOOK OK FOR NOW
AND MAY NEED TO EXPAND THE WINTER STORM WARNING AREA NORTH SOME
INTO PLATTE COUNTY.
&&
.SHORT TERM...(THIS EVENING THROUGH THURSDAY)
ISSUED AT 218 PM MDT TUE APR 30 2013
PCPN GRADUALLY INCREASING IN COVERAGE OVER MOST OF THE CWA THIS
AFTERNOON THOUGH LIGHT IN NATURE. EXPECT THIS TREND TO CONTINUE
THROUGH THIS EVENING AS AIR MASS MOISTENS AND LIFT INCREASES IN
RESPONSE TO MID AND UPPER FORCING WITH APPROACH OF NEXT UPPER
SYSTEM NOW DIGGING OVER THE PACIFIC NW/NORTHERN ROCKYS. LITTLE
CHANGE TO ONGOING FORECAST REASONING WITH PCPN CHANGING TO SNOW
OVER THE HIGH PLAINS THIS EVENING...LATER OVER THE NEB PANHANDLE.
BEST DYNAMICAL FORCING LOOKS LIKE IT WILL BE MAINLY THIS EVENING
UNTIL A LITTLE AFTER MIDNIGHT BEFORE SHIFTING SOUTH LATER TONIGHT.
MODELS HAVE TRENDED A LITTLE FASTER WITH THE PROGRESSION OF THE
PCPN TONIGHT WHICH WOULD ACT TO LOWER EXPECTED AMOUNTS A LITTLE.
HEAVIEST SNOW STILL APPEARS THAT IT WILL BE OVER THE SOUTH LARAMIE
RANGE EAST INTO THE EXTREME SW CORNER OF THE PANHANDLE. CURRENT
HILITES STILL LOOK GOOD OVERALL THOUGH SOME CONCERN ABOUT THE
LARAMIE VALLEY AS SNOW THERE MAY BE HINDERED FURTHER BY
UNFAVORABLE WIND DIRECTION.
SNOW...MAINLY LIGHT...SHOULD PERSIST OVER MUCH OF THE CWA WEDS
MORNING THEN TAPER OFF DURING THE DAY AS BETTER DYNAMICS AND LIFT
MOVE SOUTH OVER COLORADO. COOL CONDITIONS WEDS ESPECIALLY OVER
THE SOUTHERN PORTION OF THE CWA WHERE CLOUDS AND PCPN WILL HANG ON
THE LONGEST. CLEARING AND QUITE COOL WEDS NIGHT THEN DRY AND A
LITTLE WARMER THURSDAY IN NORTHERLY FLOW BEHIND DEPARTING UPPER
TROF.
.LONG TERM...(THURSDAY NIGHT THROUGH TUESDAY)
ISSUED AT 218 PM MDT TUE APR 30 2013
NO BIG CHANGES TO THE EXTENDED FORECAST. WILL START OFF THURSDAY
NIGHT WITH DRY CONDITIONS UNDER THE INFLUENCE OF SURFACE HIGH
PRESSURE. THE BIG QUESTION FRIDAY THROUGH SUNDAY IS THE PLACEMENT OF
A CUT OFF UPPER LEVEL LOW. MODELS STILL STRUGGLING TO FIND ANY
CONSISTENCY WITH THE TRACK OF THE UPPER LOW...HOWEVER THE OVERALL
TREND IS FOR THE LOW TO GRADUALLY SLIP NORTH AND EAST FROM THE
SOUTHERN PLAINS THURSDAY INTO THE UPPER MISSISSIPPI VALLEY SUNDAY.
THEREFORE NOT EXPECTING MUCH OF AN IMPACT ON THE FORECAST AREA.
MAINLY LOOKING AT DRY CONDITIONS THROUGH THE FORECAST PERIOD BUT
COULD SEE SOME SHOWER ACTIVITY AROUND SATURDAY AND SUNDAY WITH A
SHORTWAVE WHICH WILL DROP SOUTH OUT OF CANADA.
&&
.AVIATION...(FOR THE 06Z TAFS THROUGH 06Z WEDNESDAY EVENING)
ISSUED AT 1135 PM MDT TUE APR 30 2013
SNOW WILL CONTINUE TO FALL ACROSS EXTREME SOUTHEAST WY AND THE
SOUTHERN NEB PANHANDLE OVERNIGHT. CIGS AND VSBYS WILL BE REDUCED
TO LIFR IN THE HEAVIER SNOWFALL FROM EAST OF LAR THRU CYS AND SNY
UNTIL 15Z. MVFR TO OCCASIONAL IFR CAN BE EXPECTED FOR THE REMAINDER
OF THE FORECAST AREA. AFTER 15Z...CONDITIONS WILL GRADUALLY IMPROVE
WITH MVFR CIGS AND VSBYS IN LIGHT SNOW. SURFACE WINDS WILL BE
NORTHEASTERLY 10 TO 20 KT WITH GUSTS TO 25 KT.
&&
.FIRE WEATHER...
ISSUED AT 218 PM MDT TUE APR 30 2013
NO CONCERNS ANTICIPATED FOR THE REST OF THE WEEK WITH NON-CRITICAL
CONDITIONS EXPECTED AND GREEN-UP CONTINUING. MUCH COOLER ACROSS THE
AREA WEDNESDAY THEN WARMING SOME THURSDAY AND FRIDAY. RAIN AND
SNOW LIKELY TONIGHT INTO WEDS...ESPECIALLY FROM FAR SOUTHEAST
WYOMING INTO MUCH OF THE NEBRASKA PANHANDLE.
&&
.CYS WATCHES/WARNINGS/ADVISORIES...
WY...WINTER WEATHER ADVISORY UNTIL 6 PM MDT WEDNESDAY FOR WYZ106>108-
114.
WINTER STORM WARNING UNTIL 6 PM MDT WEDNESDAY FOR WYZ115>119.
NE...WINTER WEATHER ADVISORY UNTIL 6 PM MDT WEDNESDAY FOR NEZ019>021-
054-055.
&&
UPDATE...WEILAND
SHORT TERM...RE
LONG TERM...LIEBL
AVIATION...JAMSKI
FIRE WEATHER...REHAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHEYENNE WY 808 PM MDT TUE APR 30 2013 WYZ101>119-011030- 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- 808 PM MDT TUE APR 30 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL WYOMING... SOUTH CENTRAL WYOMING AND SOUTHEAST WYOMING. .DAY ONE...TONIGHT SNOW...HEAVY AT TIMES CAN BE EXPECTED FOR THE REST OF TONIGHT. THE HEAVIEST SNOW WILL BE OVER AND EAST OF THE LARAMIE RANGE. A WINTER STORM WARNING IS IN EFFECT FROM LARAMIE TO PINE BLUFFS...WITH A WINTER WEATHER ADVISORY IN NEARBY AREAS. SNOWFALL TONIGHT IN THE WARNING AREA WILL BE BETWEEN 3 AND 6 INCHES...WITH LARGER AMOUNTS OVER THE SOUTHERN LARAMIE RANGE. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY ADDITIONAL MAINLY LIGHT SNOW ACCUMULATIONS ARE EXPECTED THROUGH WEDNESDAY AFTERNOON BEFORE TAPERING OFF WEDNESDAY EVENING. THE WINTER STORM WARNING AND ADVISORY REMAIN IN EFFECT THROUGH 6 PM. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT. REPORTS OF SNOWFALL TONIGHT 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>021-054-055-095-096-011030- DAWES-BOX BUTTE-SCOTTS BLUFF-BANNER-MORRILL-KIMBALL-CHEYENNE- NORTH SIOUX-SOUTH SIOUX- 808 PM MDT TUE APR 30 2013 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE WESTERN NEBRASKA PANHANDLE. .DAY ONE...TONIGHT RAIN WILL GRADUALLY CHANGE OVER TO SNOW OVER THE PANHANDLE THROUGH THE LATE EVENING. LIGHT TO MODERATE SNOW ACCUMULATIONS WILL BE POSSIBLE FOR THE SOUTHERN PANHANDLE INCLUDING SCOTTSBLUFF...KIMBALL AND SIDNEY WHERE A WINTER WEATHER ADVISORY IS IN EFFECT. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY LIGHT SNOW WILL CONTINUE THROUGH WEDNESDAY AFTERNOON BEFORE TAPERING OFF WEDNESDAY EVENING. THE WINTER WEATHER ADVISORY REMAINS IN EFFECT THROUGH 6 PM. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TONIGHT. REPORTS OF SNOWFALL TONIGHT WILL BE APPRECIATED. && THIS PRODUCT...ALONG WITH OTHER WEATHER...HYDROLOGIC...AND CLIMATE INFORMATION IS AVAILABLE ON THE WEB AT... HTTP://WEATHER.GOV/CHEYENNE WEILAND
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
1016 PM MDT TUE APR 30 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1015 PM SNOW HILLSDALE 41.21N 104.48W
04/30/2013 M2.3 INCH LARAMIE WY TRAINED SPOTTER
&&
MAZURPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
1035 PM MDT TUE APR 30 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
900 PM SNOW 19 WSW ENCAMPMENT 41.10N 107.13W
2/1/2013 E9.0 INCHES CARBON WY PARK/FOREST SRVC
THIS IS FROM THE DIVIDE PEAK SNOTEL SITE IN THE SIERRA
MADRE RANGE AT AN ELEVATION OF 8880 FEET. THE SNOW
WATER EQUIVALENT WAS 0.6 INCHES AND THE SNOW TO LIQUID RATIO
WAS 15 TO 1. THIS IS THE ESTIMATED SNOWFALL SINCE 5 AM
JANUARY 31 2013.
0900 PM SNOW 11 SSE ENCAMPMENT 41.06N 106.71W
4/30/2013 E2.0 INCHES CARBON WY PARK/FOREST SRVC
THIS IS FROM THE BLACKHALL MOUNTAIN SNOTEL SITE IN THE
SIERRA MADRE RANGE AT AN ELEVATION OF 9820 FEET. THE SNOW
WATER EQUIVALENT WAS 0.2 INCHES AND THE SNOW TO LIQUID
RATIO WAS 10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 17 ENE RIVERSIDE 41.31N 106.48W
4/30/2013 E2.0 INCHES CARBON WY PARK/FOREST SRVC
THIS IS FROM THE SOUTH BRUSH CREEK SNOTEL SITE IN THE
SNOWY RANGE AT AN ELEVATION OF 8440 FEET. THE SNOW WATER
EQUIVALENT WAS 0.2 INCHES AND THE SNOW TO LIQUID RATIO WAS
10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 12 WNW CENTENNIAL 41.37N 106.32W
4/30/2013 E3.0 INCHES ALBANY WY PARK/FOREST SRVC
THIS IS FROM THE NORTH FRENCH CREEK SNOTEL SITE IN THE
SNOWY RANGE AT AN ELEVATION OF 10130 FEET. THE SNOW WATER
EQUIVALENT WAS 0.3 INCHES AND THE SNOW TO LIQUID RATIO WAS
10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 30 WNW LARAMIE 41.48N 106.12W
4/30/2013 E13.5 INCHES CARBON WY PARK/FOREST SRVC
THIS IS FROM THE SAND LAKE SNOTEL SITE IN THE SNOWY RANGE
AT AN ELEVATION OF 10050 FEET. THE SNOW WATER EQUIVALENT
WAS 0.3 INCHES AND THE SNOW TO LIQUID RATIO WAS 10 TO 1.
THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 7 NW CENTENNIAL 41.37N 106.21W
4/30/2013 E1.0 INCH ALBANY WY PARK/FOREST SRVC
THIS IS FROM THE BROOKLYN SNOTEL SITE IN THE SNOWY RANGE
AT AN ELEVATION OF 10240 FEET. THE SNOW WATER EQUIVALENT
WAS 0.1 INCHES AND THE SNOW TO LIQUID RATIO WAS 10 TO 1.
THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 6 SW CENTENNIAL 41.24N 106.19W
4/30/2013 E10.0 INCHES ALBANY WY PARK/FOREST SRVC
THIS IS FROM THE CINNABAR PARK SNOTEL SITE IN THE SNOWY
RANGE AT AN ELEVATION OF 9574 FEET. THE SNOW WATER
EQUIVALENT WAS 0.2 INCHES AND THE SNOW TO LIQUID RATIO WAS
10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 10 SE LARAMIE 41.23N 105.38W
4/30/2013 E5.0 INCHES ALBANY WY PARK/FOREST SRVC
THIS IS FROM THE CROW CREEK SNOTEL SITE IN THE LARAMIE
RANGE AT AN ELEVATION OF 8330 FEET. THE SNOW WATER
EQUIVALENT WAS 0.5 INCHES AND THE SNOW TO LIQUID RATIO WAS
10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 12 SW ESTERBROOK 42.28N 105.58W
4/30/2013 E5.0 INCHES ALBANY WY PARK/FOREST SRVC
THIS IS FROM THE WINDY PEAK SNOTEL SITE IN THE LARAMIE
RANGE AT AN ELEVATION OF 7900 FEET. THE SNOW WATER
EQUIVALENT WAS 0.5 INCHES AND THE SNOW TO LIQUID RATIO WAS
10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
&&
MWEILANDPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE CHEYENNE WY
1039 PM MDT TUE APR 30 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
900 PM SNOW 19 WSW ENCAMPMENT 41.10N 107.13W
4/30/2013 E9.0 INCHES CARBON WY PARK/FOREST SRVC
THIS IS FROM THE DIVIDE PEAK SNOTEL SITE IN THE SIERRA
MADRE RANGE AT AN ELEVATION OF 8880 FEET. THE SNOW
WATER EQUIVALENT WAS 0.6 INCHES AND THE SNOW TO LIQUID RATIO
WAS 15 TO 1. THIS IS THE ESTIMATED SNOWFALL SINCE 2 PM.
0900 PM SNOW 11 SSE ENCAMPMENT 41.06N 106.71W
4/30/2013 E2.0 INCHES CARBON WY PARK/FOREST SRVC
THIS IS FROM THE BLACKHALL MOUNTAIN SNOTEL SITE IN THE
SIERRA MADRE RANGE AT AN ELEVATION OF 9820 FEET. THE SNOW
WATER EQUIVALENT WAS 0.2 INCHES AND THE SNOW TO LIQUID
RATIO WAS 10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 17 ENE RIVERSIDE 41.31N 106.48W
4/30/2013 E2.0 INCHES CARBON WY PARK/FOREST SRVC
THIS IS FROM THE SOUTH BRUSH CREEK SNOTEL SITE IN THE
SNOWY RANGE AT AN ELEVATION OF 8440 FEET. THE SNOW WATER
EQUIVALENT WAS 0.2 INCHES AND THE SNOW TO LIQUID RATIO WAS
10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 12 WNW CENTENNIAL 41.37N 106.32W
4/30/2013 E3.0 INCHES ALBANY WY PARK/FOREST SRVC
THIS IS FROM THE NORTH FRENCH CREEK SNOTEL SITE IN THE
SNOWY RANGE AT AN ELEVATION OF 10130 FEET. THE SNOW WATER
EQUIVALENT WAS 0.3 INCHES AND THE SNOW TO LIQUID RATIO WAS
10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 30 WNW LARAMIE 41.48N 106.12W
4/30/2013 E13.5 INCHES CARBON WY PARK/FOREST SRVC
THIS IS FROM THE SAND LAKE SNOTEL SITE IN THE SNOWY RANGE
AT AN ELEVATION OF 10050 FEET. THE SNOW WATER EQUIVALENT
WAS 0.3 INCHES AND THE SNOW TO LIQUID RATIO WAS 10 TO 1.
THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 7 NW CENTENNIAL 41.37N 106.21W
4/30/2013 E1.0 INCH ALBANY WY PARK/FOREST SRVC
THIS IS FROM THE BROOKLYN SNOTEL SITE IN THE SNOWY RANGE
AT AN ELEVATION OF 10240 FEET. THE SNOW WATER EQUIVALENT
WAS 0.1 INCHES AND THE SNOW TO LIQUID RATIO WAS 10 TO 1.
THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 6 SW CENTENNIAL 41.24N 106.19W
4/30/2013 E10.0 INCHES ALBANY WY PARK/FOREST SRVC
THIS IS FROM THE CINNABAR PARK SNOTEL SITE IN THE SNOWY
RANGE AT AN ELEVATION OF 9574 FEET. THE SNOW WATER
EQUIVALENT WAS 0.2 INCHES AND THE SNOW TO LIQUID RATIO WAS
10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 10 SE LARAMIE 41.23N 105.38W
4/30/2013 E5.0 INCHES ALBANY WY PARK/FOREST SRVC
THIS IS FROM THE CROW CREEK SNOTEL SITE IN THE LARAMIE
RANGE AT AN ELEVATION OF 8330 FEET. THE SNOW WATER
EQUIVALENT WAS 0.5 INCHES AND THE SNOW TO LIQUID RATIO WAS
10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 12 SW ESTERBROOK 42.28N 105.58W
4/30/2013 E5.0 INCHES ALBANY WY PARK/FOREST SRVC
THIS IS FROM THE WINDY PEAK SNOTEL SITE IN THE LARAMIE
RANGE AT AN ELEVATION OF 7900 FEET. THE SNOW WATER
EQUIVALENT WAS 0.5 INCHES AND THE SNOW TO LIQUID RATIO WAS
10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
&&
MWEILANDPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE CHEYENNE WY
1039 PM MDT TUE APR 30 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
900 PM SNOW 19 WSW ENCAMPMENT 41.10N 107.13W
4/30/2013 E6.0 INCHES CARBON WY PARK/FOREST SRVC
THIS IS FROM THE DIVIDE PEAK SNOTEL SITE IN THE SIERRA
MADRE RANGE AT AN ELEVATION OF 8880 FEET. THE SNOW
WATER EQUIVALENT WAS 0.6 INCHES AND THE SNOW TO LIQUID RATIO
WAS 10 TO 1. THIS IS THE ESTIMATED SNOWFALL SINCE 2 PM.
0900 PM SNOW 11 SSE ENCAMPMENT 41.06N 106.71W
4/30/2013 E2.0 INCHES CARBON WY PARK/FOREST SRVC
THIS IS FROM THE BLACKHALL MOUNTAIN SNOTEL SITE IN THE
SIERRA MADRE RANGE AT AN ELEVATION OF 9820 FEET. THE SNOW
WATER EQUIVALENT WAS 0.2 INCHES AND THE SNOW TO LIQUID
RATIO WAS 10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 17 ENE RIVERSIDE 41.31N 106.48W
4/30/2013 E2.0 INCHES CARBON WY PARK/FOREST SRVC
THIS IS FROM THE SOUTH BRUSH CREEK SNOTEL SITE IN THE
SNOWY RANGE AT AN ELEVATION OF 8440 FEET. THE SNOW WATER
EQUIVALENT WAS 0.2 INCHES AND THE SNOW TO LIQUID RATIO WAS
10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 12 WNW CENTENNIAL 41.37N 106.32W
4/30/2013 E3.0 INCHES ALBANY WY PARK/FOREST SRVC
THIS IS FROM THE NORTH FRENCH CREEK SNOTEL SITE IN THE
SNOWY RANGE AT AN ELEVATION OF 10130 FEET. THE SNOW WATER
EQUIVALENT WAS 0.3 INCHES AND THE SNOW TO LIQUID RATIO WAS
10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 30 WNW LARAMIE 41.48N 106.12W
4/30/2013 E3.0 INCHES CARBON WY PARK/FOREST SRVC
THIS IS FROM THE SAND LAKE SNOTEL SITE IN THE SNOWY RANGE
AT AN ELEVATION OF 10050 FEET. THE SNOW WATER EQUIVALENT
WAS 0.3 INCHES AND THE SNOW TO LIQUID RATIO WAS 10 TO 1.
THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 7 NW CENTENNIAL 41.37N 106.21W
4/30/2013 E1.0 INCH ALBANY WY PARK/FOREST SRVC
THIS IS FROM THE BROOKLYN SNOTEL SITE IN THE SNOWY RANGE
AT AN ELEVATION OF 10240 FEET. THE SNOW WATER EQUIVALENT
WAS 0.1 INCHES AND THE SNOW TO LIQUID RATIO WAS 10 TO 1.
THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 6 SW CENTENNIAL 41.24N 106.19W
4/30/2013 E2.0 INCHES ALBANY WY PARK/FOREST SRVC
THIS IS FROM THE CINNABAR PARK SNOTEL SITE IN THE SNOWY
RANGE AT AN ELEVATION OF 9574 FEET. THE SNOW WATER
EQUIVALENT WAS 0.2 INCHES AND THE SNOW TO LIQUID RATIO WAS
10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 10 SE LARAMIE 41.23N 105.38W
4/30/2013 E5.0 INCHES ALBANY WY PARK/FOREST SRVC
THIS IS FROM THE CROW CREEK SNOTEL SITE IN THE LARAMIE
RANGE AT AN ELEVATION OF 8330 FEET. THE SNOW WATER
EQUIVALENT WAS 0.5 INCHES AND THE SNOW TO LIQUID RATIO WAS
10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
0900 PM SNOW 12 SW ESTERBROOK 42.28N 105.58W
4/30/2013 E5.0 INCHES ALBANY WY PARK/FOREST SRVC
THIS IS FROM THE WINDY PEAK SNOTEL SITE IN THE LARAMIE
RANGE AT AN ELEVATION OF 7900 FEET. THE SNOW WATER
EQUIVALENT WAS 0.5 INCHES AND THE SNOW TO LIQUID RATIO WAS
10 TO 1. THE SNOWFALL WAS SINCE 2 PM.
&&
MWEILANDPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
1118 PM MDT TUE APR 30 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1050 PM SNOW 2 E CHEYENNE 41.15N 104.75W
04/30/2013 M5.0 INCH LARAMIE WY BROADCAST MEDIA
2.5 INCHES FELL IN PAST 90 MINUTES.
&&
MJAMSKIPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHEYENNE WY
1202 AM MDT WED MAY 01 2013
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1200 AM HEAVY SNOW CHEYENNE 41.15N 104.79W
05/01/2013 M6.0 INCH LARAMIE WY OFFICIAL NWS OBS
SIX HOURLY MEASUREMENT.
&&
MJAMSKIThe national radar mosaic for the moment the first event began.
6 winter storm. Local standard time, as filed.
An additional 4.3 inches was measured at the NWSFO in Cheyenne since midnight for a storm total of 11.6 inches.
An observer 3.5 miles east-southeast of Laramie measured an additional two inches of snow since midnight for a storm total of eight inches.
An observer six miles west of Buford measured an additional 13 inches of snow since midnight for a storm total of 20 inches.
An observer 15 miles west of Cheyenne measured an additional eight inches of snow for a storm total of 15 inches.
An observer 20 miles southwest of Wheatland measured an additional four inches of snow for a storm total of nine inches.
An observer four miles north-northeast of Carpenter measured an additional six inches of snow for a storm total of ten inches.
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, May 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: 439333, 439334, 439335, 439337, 439339, 439341.