A snowboarder was killed when he triggered an avalanche in an area known as High Trail Cliffs northeast of Berthoud Pass. A pair of snowboarders and one dog left Berthoud Pass and headed northeast.
Every event with a place to put it; 1 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 BOU wrote it up.
A snowboarder was killed when he triggered an avalanche in an area known as High Trail Cliffs northeast of Berthoud Pass. A pair of snowboarders and one dog left Berthoud Pass and headed northeast. They took a high traverse below the High Trail Cliffs. They were near the northeast edge of the Cliffs when they triggered the avalanche.
The first snowboarder was about 50 feet ahead of his friend and the dog when the slide started. He as able to outrun the avalanche, and stopped at the trees. The victim was buried face down and buried under about 18 inches of avalanche debris. His dog was buried next to him.
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 Denver/Boulder, CO wrote its last area forecast discussion before the first event at Jan 20, 4:15 AM MST, 5 hours 45 minutes earlier.
AREA FORECAST DISCUSSION...CORRECTION NATIONAL WEATHER SERVICE DENVER/BOULDER CO 415 AM MST THU JAN 20 2011 ADDED MISSING AVIATION SECTION .SHORT TERM...BESIDES A FEW AREAS OF FLURRIES OVER THE PALMER DIVIDE AND LIGHT SNOW OVER THE HIGHEST MOUNTAINS...SNOW FROM YESTERDAYS SYSTEM HAS DISSIPATED AS THE UPPER SYSTEM HAS MOVED SOUTHEAST OF THE STATE. MOSTLY CLEAR SKIES TODAY WILL ACCOMPANY A DRIER AND COLD AIRMASS WITH HIGHS ONLY REACHING INTO THE 30S OVER THE PLAINS AND INTO THE UPPER TEENS TO LOWER 20S OVER THE MOUNTAINS. STRONG NNWLY WINDS ALOFT BEHIND YESTERDAYS TROUGH WILL DIMINISH SLIGHTLY BEFORE ANOTHER PIECE OF ENERGY IN THE JET INCREASES SPEEDS AGAIN. WITH A STABLE MOUNTAIN TOP LAYER...COULD SEE SOME WAVE CLOUDS GENERATED LATER THIS AFTERNOON INTO THE EVENING. AN INCREASE IN PACIFIC MOISTURE WITH THIS SPEED MAX WILL BRING AREAS OF SNOW TO THE HIGHER MOUNTAINS THIS EVENING...BECOMING WIDESPREAD AFTER MIDNIGHT WHEN OROGRAPHICS BECOME MOST FAVORABLE WITH GOOD MOISTURE. EXPECT UP TO A COUPLE INCHES OF SNOW BY MORNING LIGHT...FAVORING WESTERN FACING SLOPES. WITH INCREASING WINDS ALOFT AND A STABLE MOUNTAIN TOP LAYER...WILL SEE WESTERLY WINDS OVER THE MOUNTAINS AND FOOTHILLS INCREASING THIS EVENING WITH SPEEDS REACHING A MAXIMUM BETWEEN MIDNIGHT AND SUNRISE. SPEEDS OF 25 TO 35 MPH WITH GUSTS UP TO 55 MPH WILL BE COMMON...HOWEVER WILL MOST LIKELY SEE SPEEDS NEARING 40 TO 50 MPH WITH GUSTS UP TO 70 MPH ABOVE TREELINE AND THROUGH THE NORMALLY WINDY AREAS. DO NOT BELIEVE WARNING CRITERIA OF 75 MPH WILL BE MET...HOWEVER WILL GET CLOSE IN A FEW SPOTS. THE CURRENT FALLING SNOW AND THE RECENTLY FALLEN SNOW WILL COMBINE WITH THESE STRONG WINDS TO CREATE AREAS OF BLOWING SNOW THAT WILL RESTRICT VISIBILITY IN MANY AREAS OVER THE MOUNTAINS AND FOOTHILLS. DRIVING OVER PASSES COULD BECOME DIFFICULT IN BLOWING SNOW AND HIGH WINDS. .LONG TERM...NORTHWEST FLOW ALOFT AND SEVERAL EMBEDDED SHORTWAVES WILL KEEP NORTH CENTRAL AND NORTHEAST COLORADO IN A FAIRLY ACTIVE PATTERN THE NEXT FEW DAYS. BY FRIDAY MORNING...THE CROSS MOUNTAIN COMPONENT ALONG WITH STRONGEST WINDS WILL BE WEAKENING AS FLOW TURNS MORE NORTHWESTERLY AND GRADUALLY RELAXES. HOWEVER...THE GUSTY WINDS ARE EXPECTED TO SPREAD ACROSS THE PLAINS DURING THE DAY AS SUBSIDENCE AND DAYTIME HEATING AID MOMENTUM TRANSFER OF STRONGER WINDS DOWN TOWARD THE SURFACE. IN THE HIGH COUNTRY...RATHER STRONG OROGRAPHICS AND MODEST AMOUNTS OF MOISTURE WILL KEEP SNOW SHOWERS GOING DURING THE MORNING...ALTHOUGH SNOWFALL AMOUNTS WILL BE LIGHT WITH POOR LAPSE RATES ONLY NEAR 4 C/KM. SNOW MODEL SUGGESTS ONLY A COUPLE INCHES OF ADDITIONAL SNOWFALL AND THIS SEEMS REASONABLE WITH THE STABLE AIRMASS. ENOUGH DRYING AND SUBSIDENCE BUILD IN BY AFTERNOON FOR A DECREASE OF SHOWER COVERAGE IN THE MOUNTAINS AND MOSTLY SUNNY SKIES ON THE PLAINS. THE WINDS AND SUNSHINE WILL AID WARMING...SO WE WILL KEEP THE MID AND UPPER 40S IN THE FORECAST AS THE LATEST SNOW COVER WILL BE MELTING. THE NEXT AND POTENTIALLY STRONGER STORM SYSTEM WILL BE REACHING THE FORECAST AREA SATURDAY. THIS SYSTEM IS ADVERTISED TO BRING STRONGER Q-G LIFT TO THE FORECAST AREA...AS WELL AS DEEPER MOISTURE...HIGHER LAPSE RATES NEAR 7 C/KM...AND POTENTIAL FOR ANOTHER SHOT OF SNOWFALL ACROSS THE PLAINS BEHIND A SURFACE COLD FRONT. WITH THESE FACTORS IN PLACE...WE HAVE INCREASED THE CHANCE OF SNOW IN THE HIGH COUNTRY AND NEAR THE FOOTHILLS/PALMER DIVIDE. AT THIS TIME...THE THREAT OF SNOW IS NOT AS HIGH AS YESTERDAY SINCE THE MAIN SURFACE HIGH PRESSURE IS BUILDING IN FROM THE NORTHWEST...AND NOT FROM THE NORTH LIKE WEDNESDAY. THEREFORE...ANY UPSLOPE IS EXPECTED TO BE QUITE SHALLOW AND ANY SNOW ACCUMULATION SHOULD BE LIGHT. HOWEVER...WE WILL HAVE TO WATCH OUT FOR LONGMONT ANTICYCLONE DEVELOPMENT WITH THE NORTHWEST FLOW ACROSS THE CHEYENNE RIDGE. THIS CAN ALWAYS AID UPSLOPE COMPONENT IN THE DENVER METRO AREA. THERE IS YET ANOTHER SHORT WAVE LURKING FOR LATE SUNDAY NIGHT/MONDAY WHICH WILL BRING ANOTHER CHANCE OF SNOW TO THE MOUNTAINS AND HAVE INTRODUCED LOW POPS ON THE PLAINS WITH POTENTIAL FOR AT LEAST SHALLOW UPSLOPE BEHIND THAT COLD FRONT. AFTER THAT...CONSIDERABLE MODEL SPREAD OCCURS BETWEEN THE ECMWF AND GFS. THE ECWMF SHOWS ONE MORE SHORT WAVE DROPPING ACROSS THE AREA LATE TUESDAY INTO WEDNESDAY...WHILE THE GFS AND ALMOST ALL OF ITS ENSEMBLE MEMBERS BUILD A BIGGER RIDGE OVER THE NORTHERN CENTRAL ROCKIES. THIS WOULD SUPPORT A MAINLY DRY FORECAST FOR TUESDAY AND WEDNESDAY AS THE ECMWF IS AN OUTLIER AT THIS TIME. && .AVIATION...CEILINGS OF 5-6KFT THIS MORNING SHOULD IMPROVE BY 14Z OR SO AS MOISTURE IS BEING PUSHED SOUTH. OTHERWISE...LIGHT SOUTHERLY WINDS THROUGH THE DAY WITH VFR CONDITIONS. WEST WINDS WILL BE INCREASING THIS EVENING THROUGH EARLY FRIDAY MORNING...HIGHEST SPEEDS EXPECTED AT KBJC. .BOU WATCHES/WARNINGS/ADVISORIES...NONE. && SHORT TERM...KRIEDERMAN LONG TERM....BARJENBRUCH
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 547 AM MST THU JAN 20 2011 COZ030>051-201800- JACKSON COUNTY BELOW 9000 FEET-WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET-GRAND AND SUMMIT COUNTIES BELOW 9000 FEET-SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET-SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/GILPIN/CLEAR CREEK/ SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET-JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET-CENTRAL AND SOUTHEAST PARK COUNTY-LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY-BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY-NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/ EAST BROOMFIELD COUNTY-ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET-NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY-CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY-SOUTHEAST ELBERT COUNTY BELOW 6000 FEET/SOUTH LINCOLN COUNTY-LOGAN COUNTY-WASHINGTON COUNTY-SEDGWICK COUNTY-PHILLIPS COUNTY- 547 AM MST THU JAN 20 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT A DRY NORTHWEST FLOW ALOFT TODAY WILL SEE INCREASING MOISTURE AND WIND SPEEDS TONIGHT AS AN UPPER LEVEL JET STRENGTHENS. SNOW WILL BEGIN INCREASING OVER THE MOUNTAINS THIS EVENING BECOMING WIDESPREAD OVER THE WESTERN SLOPES AFTER MIDNIGHT. EXPECT 1 TO 2 INCHES OF ACCUMULATION BY SUNRISE. A LEE SURFACE TROUGH WILL DEEPEN ACROSS THE PLAINS TONIGHT TO HELP WESTERLY WINDS INCREASE OVER THE MOUNTAINS AND FOOTHILLS. SPEEDS OF 25 TO 40 MPH WITH GUSTS TO 60 MPH WILL OCCUR PAST MIDNIGHT. THE NORMALLY WINDY AREAS COULD SEE GUSTS REACHING NEAR 70 MPH AT TIMES. THESE STRONG WINDS WILL MIX WITH THE CURRENT AND PAST FALLEN SNOW TO PRODUCE AREAS OF BLOWING SNOW...REDUCING VISIBILITY. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY A SERIES OF UPPER LEVEL DISTURBANCES IN NORTHWEST FLOW ALOFT WILL KEEP PERIODS OF SNOW IN THE FORECAST FOR THE MOUNTAINS THROUGH EARLY NEXT WEEK. THE FIRST DISTURBANCE WILL BE PASSING OVERHEAD BY EARLY FRIDAY MORNING WITH LIGHT SNOWFALL IN THE MOUNTAINS. UP TO 2 INCHES OF NEW SNOW WILL BE POSSIBLE BEFORE THE SNOW DECREASES BY AFTERNOON. GUSTY WINDS WILL CONTINUE TO PRODUCE AREAS OF BLOWING AND DRIFTING SNOW IN THE HIGH COUNTRY...WITH GUSTY WINDS ALSO SPREADING FROM THE FOOTHILLS ACROSS THE PLAINS DURING THE DAY. A STRONGER UPPER LEVEL DISTURBANCE IS EXPECTED TO MOVE ACROSS COLORADO SATURDAY AND SATURDAY NIGHT. THIS SYSTEM WILL HAVE POTENTIAL TO PRODUCE SEVERAL INCHES OF SNOW IN THE MOUNTAINS ALONG WITH MORE BLOWING SNOW AND HAZARDOUS TRAVEL CONDITIONS. THERE WILL ALSO BE A CHANCE OF SNOW SHOWERS ON THE PLAINS BUT AT THIS TIME ANY ACCUMULATION IN THE LOWER ELEVATIONS IS EXPECTED TO BE LIGHT. ONE MORE DISTURBANCE MAY MOVE ACROSS THE STATE MONDAY WITH MORE SNOW SHOWERS POSSIBLE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. KRIEDERMAN/BARJENBRUCH
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
436 AM MST THU JAN 20 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0430 AM SNOW LOUISVILLE 39.97N 105.14W
01/20/2011 M4.2 INCH BOULDER CO TRAINED SPOTTER
1010 PM SNOW 3 SW GOLDEN 39.71N 105.25W
01/19/2011 M3.0 INCH JEFFERSON CO TRAINED SPOTTER
1010 PM SNOW 7 SW BOULDER 39.96N 105.34W
01/19/2011 M3.0 INCH BOULDER CO TRAINED SPOTTER
0945 PM SNOW 4 ENE NEDERLAND 39.99N 105.45W
01/19/2011 M3.0 INCH BOULDER CO TRAINED SPOTTER
0900 PM SNOW 2 NE THORNTON 39.92N 104.93W
01/19/2011 M1.6 INCH ADAMS CO TRAINED SPOTTER
0900 PM SNOW GENESEE 39.69N 105.27W
01/19/2011 M3.3 INCH JEFFERSON CO TRAINED SPOTTER
0900 PM SNOW 3 N BLACK HAWK 39.84N 105.49W
01/19/2011 M2.8 INCH GILPIN CO TRAINED SPOTTER
0830 PM SNOW BROOMFIELD 39.94N 105.06W
01/19/2011 M2.5 INCH BROOMFIELD CO TRAINED SPOTTER
0823 PM SNOW KEN CARYL 39.58N 105.11W
01/19/2011 M2.5 INCH JEFFERSON CO TRAINED SPOTTER
0800 PM SNOW 5 W EVERGREEN 39.63N 105.44W
01/19/2011 M3.1 INCH CLEAR CREEK CO TRAINED SPOTTER
0800 PM HEAVY SNOW 2 SSE BRECKENRIDGE 39.47N 106.03W
01/19/2011 M6.7 INCH SUMMIT CO TRAINED SPOTTER
0725 PM SNOW 4 S EVERGREEN 39.58N 105.34W
01/19/2011 M2.4 INCH JEFFERSON CO TRAINED SPOTTER
0700 PM SNOW 5 SSW ARAPAHOE PARK 39.57N 104.71W
01/19/2011 M2.8 INCH ARAPAHOE CO TRAINED SPOTTER
0700 PM SNOW 2 SW BOULDER 40.01N 105.28W
01/19/2011 M3.2 INCH BOULDER CO NWS EMPLOYEE
0540 PM SNOW 1 SW WESTMINSTER 39.87N 105.07W
01/19/2011 M2.4 INCH JEFFERSON CO TRAINED SPOTTER
0500 PM SNOW 2 WSW BOULDER 40.02N 105.29W
01/19/2011 M4.9 INCH BOULDER CO CO-OP OBSERVER
3.5 INCHES FELL FROM 300 PM TO 430 PM
0430 PM SNOW 3 S BOULDER 39.98N 105.25W
01/19/2011 M3.5 INCH BOULDER CO TRAINED SPOTTER
PAST 90 MINUTES
0400 PM SNOW 1 WNW FRASER 39.94N 105.82W
01/19/2011 M5.0 INCH GRAND CO TRAINED SPOTTER
0400 PM SNOW 1 NNW GRAND LAKE 40.27N 105.83W
01/19/2011 M3.8 INCH GRAND CO TRAINED SPOTTER
&&
DBPRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE DENVER CO
636 AM MST THU JAN 20 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0430 AM SNOW 1 NNW LOUISVILLE 39.97N 105.14W
01/20/2011 M4.2 INCH BOULDER CO TRAINED SPOTTER
1010 PM SNOW 7 SW BOULDER 39.96N 105.34W
01/19/2011 M3.0 INCH BOULDER CO TRAINED SPOTTER
1010 PM SNOW 3 SW GOLDEN 39.71N 105.25W
01/19/2011 M3.0 INCH JEFFERSON CO TRAINED SPOTTER
0945 PM SNOW 4 ENE NEDERLAND 39.99N 105.45W
01/19/2011 M3.0 INCH BOULDER CO TRAINED SPOTTER
0900 PM SNOW 2 NE THORNTON 39.92N 104.93W
01/19/2011 M1.6 INCH ADAMS CO TRAINED SPOTTER
0900 PM SNOW 3 N BLACK HAWK 39.84N 105.49W
01/19/2011 M2.8 INCH GILPIN CO TRAINED SPOTTER
0900 PM SNOW GENESEE 39.69N 105.27W
01/19/2011 M3.3 INCH JEFFERSON CO TRAINED SPOTTER
0830 PM SNOW BROOMFIELD 39.94N 105.06W
01/19/2011 M2.5 INCH BROOMFIELD CO TRAINED SPOTTER
0823 PM SNOW KEN CARYL 39.58N 105.11W
01/19/2011 M2.5 INCH JEFFERSON CO TRAINED SPOTTER
0800 PM SNOW 5 W EVERGREEN 39.63N 105.44W
01/19/2011 M3.1 INCH CLEAR CREEK CO TRAINED SPOTTER
0800 PM HEAVY SNOW 2 SSE BRECKENRIDGE 39.47N 106.03W
01/19/2011 M6.7 INCH SUMMIT CO TRAINED SPOTTER
0725 PM SNOW 4 S EVERGREEN 39.58N 105.34W
01/19/2011 M2.4 INCH JEFFERSON CO TRAINED SPOTTER
0700 PM SNOW 2 SW BOULDER 40.01N 105.28W
01/19/2011 M3.2 INCH BOULDER CO NWS EMPLOYEE
0700 PM SNOW 5 SSW ARAPAHOE PARK 39.57N 104.71W
01/19/2011 M2.8 INCH ARAPAHOE CO TRAINED SPOTTER
0540 PM SNOW 1 SW WESTMINSTER 39.87N 105.07W
01/19/2011 M2.4 INCH JEFFERSON CO TRAINED SPOTTER
0500 PM SNOW 2 WSW BOULDER 40.02N 105.29W
01/19/2011 M4.9 INCH BOULDER CO CO-OP OBSERVER
3.5 INCHES FELL FROM 300 PM TO 430 PM
0430 PM SNOW 3 S BOULDER 39.98N 105.25W
01/19/2011 M3.5 INCH BOULDER CO TRAINED SPOTTER
PAST 90 MINUTES
0400 PM SNOW 1 WNW FRASER 39.94N 105.82W
01/19/2011 M5.0 INCH GRAND CO TRAINED SPOTTER
0400 PM SNOW 1 NNW GRAND LAKE 40.27N 105.83W
01/19/2011 M3.8 INCH GRAND CO TRAINED SPOTTER
&&
BENTONPRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
638 AM MST THU JAN 20 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0625 AM SNOW 1 NW NIWOT 40.10N 105.17W
01/20/2011 M0.7 INCH BOULDER CO TRAINED SPOTTER
0430 AM SNOW 1 NNW LOUISVILLE 39.97N 105.14W
01/20/2011 M4.2 INCH BOULDER CO TRAINED SPOTTER
1010 PM SNOW 3 SW GOLDEN 39.71N 105.25W
01/19/2011 M3.0 INCH JEFFERSON CO TRAINED SPOTTER
1010 PM SNOW 7 SW BOULDER 39.96N 105.34W
01/19/2011 M3.0 INCH BOULDER CO TRAINED SPOTTER
0945 PM SNOW 4 ENE NEDERLAND 39.99N 105.45W
01/19/2011 M3.0 INCH BOULDER CO TRAINED SPOTTER
0900 PM SNOW 3 N BLACK HAWK 39.84N 105.49W
01/19/2011 M2.8 INCH GILPIN CO TRAINED SPOTTER
0900 PM SNOW GENESEE 39.69N 105.27W
01/19/2011 M3.3 INCH JEFFERSON CO TRAINED SPOTTER
0900 PM SNOW 2 NE THORNTON 39.92N 104.93W
01/19/2011 M1.6 INCH ADAMS CO TRAINED SPOTTER
0830 PM SNOW BROOMFIELD 39.94N 105.06W
01/19/2011 M2.5 INCH BROOMFIELD CO TRAINED SPOTTER
0823 PM SNOW KEN CARYL 39.58N 105.11W
01/19/2011 M2.5 INCH JEFFERSON CO TRAINED SPOTTER
0800 PM SNOW 5 W EVERGREEN 39.63N 105.44W
01/19/2011 M3.1 INCH CLEAR CREEK CO TRAINED SPOTTER
0800 PM HEAVY SNOW 2 SSE BRECKENRIDGE 39.47N 106.03W
01/19/2011 M6.7 INCH SUMMIT CO TRAINED SPOTTER
0725 PM SNOW 4 S EVERGREEN 39.58N 105.34W
01/19/2011 M2.4 INCH JEFFERSON CO TRAINED SPOTTER
0700 PM SNOW 2 SW BOULDER 40.01N 105.28W
01/19/2011 M3.2 INCH BOULDER CO NWS EMPLOYEE
0700 PM SNOW 5 SSW ARAPAHOE PARK 39.57N 104.71W
01/19/2011 M2.8 INCH ARAPAHOE CO TRAINED SPOTTER
0540 PM SNOW 1 SW WESTMINSTER 39.87N 105.07W
01/19/2011 M2.4 INCH JEFFERSON CO TRAINED SPOTTER
0500 PM SNOW 2 WSW BOULDER 40.02N 105.29W
01/19/2011 M4.9 INCH BOULDER CO CO-OP OBSERVER
3.5 INCHES FELL FROM 300 PM TO 430 PM
0430 PM SNOW 3 S BOULDER 39.98N 105.25W
01/19/2011 M3.5 INCH BOULDER CO TRAINED SPOTTER
PAST 90 MINUTES
0400 PM SNOW 1 NNW GRAND LAKE 40.27N 105.83W
01/19/2011 M3.8 INCH GRAND CO TRAINED SPOTTER
0400 PM SNOW 1 WNW FRASER 39.94N 105.82W
01/19/2011 M5.0 INCH GRAND CO TRAINED SPOTTER
&&
BENTONThe national radar mosaic for the moment the first event began.
1 avalanche. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2011Every state in 2011This day in weather historyWarnings in Colorado, January 2011
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: 280342.