A frigid Arctic airmass settled into the Front Range Urban Corridor to start out the month. At Denver International Airport overnight low temperatures on the 1st through the 3rd were 13 below zero, 17 below zero and zero respectively.
Every event with a place to put it; 3 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 frigid Arctic airmass settled into the Front Range Urban Corridor to start out the month. At Denver International Airport overnight low temperatures on the 1st through the 3rd were 13 below zero, 17 below zero and zero respectively. The icy temperatures caused pipes to crack and burst following the freeze. In Loveland, firefighters responded to more that a dozen water pipe breaks, most in fire sprinkler systems at businesses, apartments and assisted care facilities. At CU Earth Sciences Library in Boulder on the 3rd, more than 1,000 books and several costumes for an upcoming production were damaged. At the county courts administration building in Jefferson County, a steady stream of water from a crack on the 5th floor, went unnoticed on the February 3rd and flooded all floors of the administration wing overnight. As a result, much of the office equipment, furniture and carpet sustained water damage. A burst sprinkler line caused minimal damage at Platte Valley Medical Center in Brighton. The icy temperatures also forced the closure of several school districts.
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 31, 7:51 PM MST, 4 hours 9 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 751 PM MST MON JAN 31 2011 .UPDATE...SNOW WAS DECREASING RATHER QUICKLY FROM NORTH TO SOUTH ACROSS THE FORECAST AREA. STILL SOME VERY LIGHT SNOW/FLURRIES BEHIND THE MAIN BAND OF SNOW MOVING ACROSS THE PALMER DIVIDE...BUT MOST OF THE ACCUMULATING SNOW IS DONE...AND MOST OF THAT WAS ONLY IN THE 1-2 INCH RANGE. WE HAVE REDUCED THE SNOW THROUGH THE REST OF THE NIGHT AS MAIN BATCH OF Q-G LIFT SHIFTS INTO NORTHERN TEXAS AND OKLAHOMA AS MAJOR WINTER STORM BEGINS TO ORGANIZE THERE. NEXT BATCH OF Q-G LIFT DROPPING IN FROM THE NORTH STAYS MOSTLY WEST OF US AND THIS LIFT IS IN A MOISTURE DEPRIVED AREA. AS A RESULT...LOOKS LIKE MAINLY FLURRIES OR VERY LIGHT SNOW IN THE ARCTIC AIRMASS WILL PREVAIL WITH LITTLE IF ANY ADDITIONAL ACCUMULATION. WE HAVE CANCELLED THE WINTER WEATHER ADVISORY IN THE FOOTHILLS WHERE WINDS/SNOW WILL NOT BE ENOUGH TO WARRANT CONTINUATION OF ANY ADVISORIES. WE HAVE LEFT THE WINTER WEATHER ADVISORY IN THE I-25 CORRIDOR TO BRIDGE THE GAP BETWEEN THE VERY COLD AIR/WIND CHILLS/POOR ROAD CONDITIONS AND THE WIND CHILL WARNING LATER TONIGHT THROUGH TUESDAY AND TUESDAY NIGHT. && .AVIATION...TOUGH CALL THIS EVENING WITH CEILINGS BOUNCING BETWEEN IFR AND VFR. WILL BE TRENDING TOWARD MVFR CEILINGS GIVEN UPSTREAM OBSERVATIONS...BUT STILL A FEW PERIODS OF VFR POSSIBLE MAINLY AT KDEN THROUGH TUESDAY MORNING. THERE IS STILL SOME LOW/MID LEVEL MOISTURE TO CONTEND WITH IN UPSLOPE FLOW...BUT ONLY A FEW PERIODS OF VERY LIGHT SNOW/FLURRIES EXPECTED INTO TUESDAY MORNING WITH LITTLE IF ANY ADDITIONAL ACCUMULATION. && .PREV DISCUSSION... /ISSUED 325 PM MST MON JAN 31 2011/ SHORT TERM...ARCTIC AIRMASS NOW WELL ENTRENCHED EAST OF THE MOUNTAINS...AND IN THE PAST FEW COUPLE HOURS HAS BEGUN FILTERING INTO VALLEY LOCATIONS WEST OF THE CONTINENTAL DIVIDE. LIGHT UPSLOPE SNOWFALL ALONG AND EAST OF THE FRONT RANGE PRETTY MUCH THROUGHOUT THE DAY HAS GENERALLY BEEN LIGHT AND INTERMITTENT...BUT THAT WILL CHANGE. HEAVIER BANDED SNOWFALL FORMING IN ADVANCE OF A JET SPEED MAXIMA ROUNDING THE BOTTOM OF A TROUGH SWINGING DOWN FM S-CNTRL WYOMING WILL MIGRATE SOUTHEASTWARD ACROSS THE FCST AREA IN THE NEXT 2 TO 4 HOURS. BEGINNING TO SEE SW-TO-NE BANDS OF ENHANCED SNOWFALL STREAMING OFF THE FRONT RANGE OVER NERN PORTIONS OF THE DENVER METRO AREA. SHOULD SEE THESE BANDS OF SNOWFALL FILLING IN OVER REMAINING PORTIONS OF THE DENVER METRO AREA BETWEEN NOW AND 5 PM. EXPECT SNOWFALL RATES OF 1/2 TO 3/4 INCH PER HOUR WITH THE HEAVIER SHOWER BANDS. THESE SAME SNOW BANDS HAVE ALSO MOVED OVER THE CENTRAL MTN AREAS UP ALONG THE I-70 CORRIDOR. BY MIDNIGHT TONIGHT COULD SEE ANOTHER 3-6 INCHES IN THE MTNS AND SRN FTHLS...1 TO 3 INCHES OVER SRN PORTIONS OF THE I-25 URBAN CORRIDOR AND MTN VALLEYS...AND GENERALLY LESS THAN 2 INCHES FARTHER OUT ACROSS THE PLAINS. OVERNIGHT...WILL SEE SNOWFALL DIMINISHING WITH THE TROUGH EXITING THE AREA LATER TONIGHT AS DRIER AND EVEN COLDER AIR FILTERS IN FROM WYOMING. WIND GRIDS SHOW WIND SPEEDS ON THE PLAINS PICKING UP OVERNIGHT AND CONTINUING THROUGH THE DAY TUESDAY. SUBZERO TEMPERATURES AND NORTH WINDS OF 10-20KTS WILL COMBINE TO PRODUCE WIND CHILLS DOWN TO 25F BELOW ZERO ON THE PLAINS TONIGHT AND 25 TO 35 BELOW ZERO ON TUESDAY. WITH SNOWFALL WINDING DOWN WILL REPLACE THE WINTER WEATHER ADVISORY ON THE PLAINS WITH A WIND CHILL WARNING BEGINNING THIS EVENING. THIS WARNING WILL CONTINUE THROUGH TUESDAY. LOWS WELL BELOW ZERO TONIGHT...AND REMAINING BELOW ZERO JUST ABOUT EVERYWHERE ON TUESDAY. HIGH TEMP OF 1 BELOW ZERO IN DENVER TOMORROW COLDEST LOW MAX TEMPERATURE IN THE PAST 13 YEARS. LONG TERM...MAIN CONCERN WILL BE THE BITTER COLD TEMPERATURES AND DANGEROUS WIND CHILL TEMPERATURES EXPECTED FOR TUESDAY NIGHT AND WEDNESDAY MORNING. STRONG SURFACE HIGH OF 1050MB BUILDING INTO NORTHERN COLORADO LATE TUESDAY NIGHT WITH CLEARING SKIES AND GOOD RADIATIONAL COOLING EXPECTED. LITTLE CHANGE IN CURRENT LOWS TUESDAY NIGHT WITH CERTAINLY AROUND RECORD COLD TEMPERATURES IN SOME LOCATIONS WITH CONTINUED WIND SPEEDS AROUND 5-10KT. WILL CONTINUE THE WIND CHILL WARNINGS FOR THE EASTERN PLAINS WITH WIND CHILL READINGS AT/BELOW -25F. THERE WILL BE A SLOW MODERATION OF TEMPERATURES FROM WED-FRIDAY...ESPECIALLY ON THURSDAY AND FRIDAY. RIDGING ALOFT BUILDS OVER THE REGION THU-FRI A BIT OF MOISTURE BLEEDS DOWN THE EAST SLOPES THURSDAY NIGHT. WILL KEEP A DRY FORECAST FOR NOW AS THIS MAINLY MID LEVEL MOISTURE WITH THE RIDGE. LONG RANGE MODELS CONTINUE TO SHOW A AN ADDITIONAL DISTURBANCE APPROACHING COLORADO LATE IN THE WEEKEND IN THE NORTHWEST FLOW ALOFT. A COLD FRONT WORKS SOUTH ACROSS NORTHEAST COLORADO ON SATURDAY NIGHT WITH SOME SNOW DEVELOPING BEHIND IT. FOR NOW WILL JUST GO A SLIGHT CHANCE OF SNOW ON THE PLAINS AND A CHANCE IN THE MOUNTAINS. OVERALL...FEW CHANGES TO THE EXTENDED FORECAST. AVIATION...IFR CONDITIONS DUE TO LOW CEILINGS AND SNOWFALL WILL PREVAIL THROUGH THIS EVENING WITH POSSIBLE LIFR CONDITIONS ASSOCIATED WITH THE HEAVIER SNOW BANDS DURING THE REMAINDER OF THIS AFTERNOON THROUGH EARLY THIS EVENING. CONDITIONS SHOULD SLOWLY IMPROVE OVERNIGHT WITH SNOW WINDING DOWN AFTER MIDNIGHT. HOWEVER COULD STILL SEE MVFR CONDITIONS WITH LIGHT SNOW OR SNOW FLURRIES AND FOG AFTER MIDNIGHT. ADDITIONAL SNOWFALL AT DENVER AREA AIRPORTS BY MIDNIGHT TONIGHT WILL RANGE FROM 1 TO 3 INCHES. LITTLE IF ANY ADDITIONAL SNOW ACCUMULATION IS EXPECTED ON TUESDAY. && .BOU WATCHES/WARNINGS/ADVISORIES... WIND CHILL WARNING UNTIL 6 AM MST WEDNESDAY FOR COZ038-042>051. WINTER WEATHER ADVISORY UNTIL MIDNIGHT MST TONIGHT FOR COZ039>041. WIND CHILL WARNING FROM MIDNIGHT TONIGHT TO 6 AM MST WEDNESDAY FOR COZ039>041. && SHORT TERM...BARJENBRUCH/BAKER LONG TERM....ENTREKIN AVIATION...BARJENBRUCH/BAKER
HAZARDOUS WEATHER OUTLOOK...DELAYED NATIONAL WEATHER SERVICE DENVER CO 709 PM MST MON JAN 31 2011 COZ030>051-011300- 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- 709 PM MST MON JAN 31 2011 ...BITTERLY COLD ARCTIC AIR AND DANGEROUS WIND CHILLS MOVING INTO NORTHEAST COLORADO... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT VERY COLD TEMPERATURES WILL MOVE INTO NORTHEAST COLORADO TONIGHT AS AN ARCTIC AIRMASS CONTINUE SWEEPING OVER THE CENTRAL U.S. PLAINS THROUGH THE MIDDLE OF THE WEEK. AREAS OF SNOW ACROSS THE NORTHEAST COLORADO PLAINS WILL BE DIMINISHING OVERNIGHT WITH LITTLE ADDITIONAL ACCUMULATION EXPECTED. TEMPERATURES WILL COOL THROUGH THE NIGHT TO REACH MORNING LOWS AROUND 10 BELOW ZERO. ALONG WITH THE COLD TEMPERATURES...WINDS OF 10 TO 15 MPH WITH GUSTS UP TO 20 MPH EAST OF THE I-25 CORRIDOR WILL CAUSE DANGEROUS WIND CHILL VALUES. A WIND CHILL WARNING WILL BE IN EFFECT FOR THE NORTHEAST COLORADO PLAINS OVERNIGHT. RESIDENTS AND MOTORISTS SHOULD BE AWARE OF THE DANGEROUS CONDITIONS CREATED BY THE WIND AND COLD TEMPERATURES AND SHOULD BE DRESSED PROPERLY IF THEY NEED TO BE OUTSIDE. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THERE WILL BE A CHANCE OF LIGHT SNOW OR FLURRIES ACROSS THE FORECAST AREA ON TUESDAY. SNOW WILL GRADUALLY END TUESDAY NIGHT. A FRIGID AIRMASS WILL CONTINUE OVER THE FORECAST AREA WITH DANGEROUS WIND CHILL READINGS TUESDAY AND TUESDAY NIGHT. SNOWFALL AMOUNTS ON TUESDAY AND TUESDAY EVENING WILL BE VERY LIGHT...LESS THAN AN INCH ON THE PLAINS AND UP TO 2 INCHES IN THE MOUNTAINS. THERE WILL BE A SLIGHT CHANCE OF SNOW AT TIMES IN THE MOUNTAINS WEDNESDAY THROUGH FRIDAY NIGHT...WITH A BETTER CHANCE OVER THE WEEKEND. THE PLAINS LOOK DRY THROUGH SATURDAY BEFORE A SLIGHT CHANCE OF SNOW IS FORECAST. TEMPERATURES WILL GRADUALLY MODERATE FROM WEDNESDAY THROUGH SATURDAY BUT READINGS WILL REMAIN BELOW SEASONAL NORMALS. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. DANKERS
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE DENVER CO
618 PM MST MON JAN 31 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0605 PM SNOW 2 SW GOLDEN 39.72N 105.25W
01/31/2011 M2.4 INCH JEFFERSON CO TRAINED SPOTTER
LOOKOUT MOUNTAIN
0601 PM SNOW N LONGMONT 40.17N 105.11W
01/31/2011 M0.7 INCH BOULDER CO TRAINED SPOTTER
0508 PM SNOW 2 SW BOULDER 40.01N 105.28W
01/31/2011 M1.7 INCH BOULDER CO NWS EMPLOYEE
DAVID SKAGGS RESEARCH CENTER NOAA
0500 PM SNOW DENVER INTL AIRPORT 39.87N 104.67W
01/31/2011 M0.5 INCH DENVER CO TRAINED SPOTTER
1 INCH ON THE GROUND. CURRENTLY LIGHT FLURRIES.
0445 PM SNOW 1 NE LITTLETON 39.60N 105.00W
01/31/2011 M1.5 INCH ARAPAHOE CO TRAINED SPOTTER
0439 PM SNOW 4 S EVERGREEN 39.58N 105.34W
01/31/2011 M0.7 INCH JEFFERSON CO TRAINED SPOTTER
LIGHT SNOW ALL DAY
0426 PM SNOW 3 W GREELEY 40.42N 104.80W
01/31/2011 M1.2 INCH WELD CO NWS EMPLOYEE
ROADS ICY IN SPOTS
0236 PM SNOW 1 SW WESTMINSTER 39.87N 105.06W
01/31/2011 M1.1 INCH JEFFERSON CO TRAINED SPOTTER
0140 PM SNOW 2 SW BOULDER 40.01N 105.28W
01/31/2011 M1.3 INCH BOULDER CO NWS EMPLOYEE
DAVID SKAGGS RESEARCH CENTER NOAA
&&
BENTONPRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
909 PM MST MON JAN 31 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0701 PM SNOW E HIGHLANDS RANCH 39.55N 104.97W
01/31/2011 M2.0 INCH DOUGLAS CO TRAINED SPOTTER
0700 PM SNOW NIWOT 40.10N 105.16W
01/31/2011 M1.4 INCH BOULDER CO TRAINED SPOTTER
0605 PM SNOW 2 SW GOLDEN 39.72N 105.25W
01/31/2011 M2.4 INCH JEFFERSON CO TRAINED SPOTTER
LOOKOUT MOUNTAIN
0601 PM SNOW N LONGMONT 40.17N 105.11W
01/31/2011 M0.7 INCH BOULDER CO TRAINED SPOTTER
0508 PM SNOW 2 SW BOULDER 40.01N 105.28W
01/31/2011 M1.7 INCH BOULDER CO NWS EMPLOYEE
DAVID SKAGGS RESEARCH CENTER NOAA
0500 PM SNOW DENVER INTL AIRPORT 39.87N 104.67W
01/31/2011 M0.5 INCH DENVER CO TRAINED SPOTTER
1 INCH ON THE GROUND. CURRENTLY LIGHT FLURRIES.
0445 PM SNOW 1 NE LITTLETON 39.60N 105.00W
01/31/2011 M1.5 INCH ARAPAHOE CO TRAINED SPOTTER
0439 PM SNOW 4 S EVERGREEN 39.58N 105.34W
01/31/2011 M0.7 INCH JEFFERSON CO TRAINED SPOTTER
LIGHT SNOW ALL DAY
0426 PM SNOW 3 W GREELEY 40.42N 104.80W
01/31/2011 M1.2 INCH WELD CO NWS EMPLOYEE
ROADS ICY IN SPOTS
0236 PM SNOW 1 SW WESTMINSTER 39.87N 105.06W
01/31/2011 M1.1 INCH JEFFERSON CO TRAINED SPOTTER
0140 PM SNOW 2 SW BOULDER 40.01N 105.28W
01/31/2011 M1.3 INCH BOULDER CO NWS EMPLOYEE
DAVID SKAGGS RESEARCH CENTER NOAA
&&
BENTONPRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
922 PM MST MON JAN 31 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0701 PM SNOW E HIGHLANDS RANCH 39.55N 104.97W
01/31/2011 M2.0 INCH DOUGLAS CO TRAINED SPOTTER
0700 PM SNOW NIWOT 40.10N 105.16W
01/31/2011 M1.4 INCH BOULDER CO TRAINED SPOTTER
0605 PM SNOW 2 SW GOLDEN 39.72N 105.25W
01/31/2011 M2.4 INCH JEFFERSON CO TRAINED SPOTTER
LOOKOUT MOUNTAIN
0601 PM SNOW N LONGMONT 40.17N 105.11W
01/31/2011 M0.7 INCH BOULDER CO TRAINED SPOTTER
0508 PM SNOW 2 SW BOULDER 40.01N 105.28W
01/31/2011 M1.7 INCH BOULDER CO NWS EMPLOYEE
DAVID SKAGGS RESEARCH CENTER NOAA
0500 PM SNOW 2 SW BOULDER 40.01N 105.28W
01/31/2011 M2.0 INCH BOULDER CO CO-OP OBSERVER
0500 PM SNOW DENVER INTL AIRPORT 39.87N 104.67W
01/31/2011 M0.5 INCH DENVER CO TRAINED SPOTTER
1 INCH ON THE GROUND. CURRENTLY LIGHT FLURRIES.
0445 PM SNOW 1 NE LITTLETON 39.60N 105.00W
01/31/2011 M1.5 INCH ARAPAHOE CO TRAINED SPOTTER
0439 PM SNOW 4 S EVERGREEN 39.58N 105.34W
01/31/2011 M0.7 INCH JEFFERSON CO TRAINED SPOTTER
LIGHT SNOW ALL DAY
0426 PM SNOW 3 W GREELEY 40.42N 104.80W
01/31/2011 M1.2 INCH WELD CO NWS EMPLOYEE
ROADS ICY IN SPOTS
0236 PM SNOW 1 SW WESTMINSTER 39.87N 105.06W
01/31/2011 M1.1 INCH JEFFERSON CO TRAINED SPOTTER
0140 PM SNOW 2 SW BOULDER 40.01N 105.28W
01/31/2011 M1.3 INCH BOULDER CO NWS EMPLOYEE
DAVID SKAGGS RESEARCH CENTER NOAA
&&
BENTONPRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
1002 PM MST MON JAN 31 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0915 PM SNOW WHEAT RIDGE 39.77N 105.10W
01/31/2011 M2.2 INCH JEFFERSON CO CO-OP OBSERVER
0701 PM SNOW E HIGHLANDS RANCH 39.55N 104.97W
01/31/2011 M2.0 INCH DOUGLAS CO TRAINED SPOTTER
0700 PM SNOW NIWOT 40.10N 105.16W
01/31/2011 M1.4 INCH BOULDER CO TRAINED SPOTTER
0605 PM SNOW 2 SW GOLDEN 39.72N 105.25W
01/31/2011 M2.4 INCH JEFFERSON CO TRAINED SPOTTER
LOOKOUT MOUNTAIN
0601 PM SNOW N LONGMONT 40.17N 105.11W
01/31/2011 M0.7 INCH BOULDER CO TRAINED SPOTTER
0508 PM SNOW 2 SW BOULDER 40.01N 105.28W
01/31/2011 M1.7 INCH BOULDER CO NWS EMPLOYEE
DAVID SKAGGS RESEARCH CENTER NOAA
0500 PM SNOW 2 SW BOULDER 40.01N 105.28W
01/31/2011 M2.0 INCH BOULDER CO CO-OP OBSERVER
0500 PM SNOW DENVER INTL AIRPORT 39.87N 104.67W
01/31/2011 M0.5 INCH DENVER CO TRAINED SPOTTER
1 INCH ON THE GROUND. CURRENTLY LIGHT FLURRIES.
0445 PM SNOW 1 NE LITTLETON 39.60N 105.00W
01/31/2011 M1.5 INCH ARAPAHOE CO TRAINED SPOTTER
0439 PM SNOW 4 S EVERGREEN 39.58N 105.34W
01/31/2011 M0.7 INCH JEFFERSON CO TRAINED SPOTTER
LIGHT SNOW ALL DAY
0426 PM SNOW 3 W GREELEY 40.42N 104.80W
01/31/2011 M1.2 INCH WELD CO NWS EMPLOYEE
ROADS ICY IN SPOTS
0236 PM SNOW 1 SW WESTMINSTER 39.87N 105.06W
01/31/2011 M1.1 INCH JEFFERSON CO TRAINED SPOTTER
0140 PM SNOW 2 SW BOULDER 40.01N 105.28W
01/31/2011 M1.3 INCH BOULDER CO NWS EMPLOYEE
DAVID SKAGGS RESEARCH CENTER NOAA
&&
BENTONPRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE DENVER CO
1036 PM MST MON JAN 31 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1015 PM SNOW NW DENVER 39.73N 104.96W
01/31/2011 M1.9 INCH DENVER CO NWS EMPLOYEE
0915 PM SNOW WHEAT RIDGE 39.77N 105.10W
01/31/2011 M2.2 INCH JEFFERSON CO CO-OP OBSERVER
0701 PM SNOW E HIGHLANDS RANCH 39.55N 104.97W
01/31/2011 M2.0 INCH DOUGLAS CO TRAINED SPOTTER
0700 PM SNOW NIWOT 40.10N 105.16W
01/31/2011 M1.4 INCH BOULDER CO TRAINED SPOTTER
0605 PM SNOW 2 SW GOLDEN 39.72N 105.25W
01/31/2011 M2.4 INCH JEFFERSON CO TRAINED SPOTTER
LOOKOUT MOUNTAIN
0601 PM SNOW N LONGMONT 40.17N 105.11W
01/31/2011 M0.7 INCH BOULDER CO TRAINED SPOTTER
0508 PM SNOW 2 SW BOULDER 40.01N 105.28W
01/31/2011 M1.7 INCH BOULDER CO NWS EMPLOYEE
DAVID SKAGGS RESEARCH CENTER NOAA
0500 PM SNOW 2 SW BOULDER 40.01N 105.28W
01/31/2011 M2.0 INCH BOULDER CO CO-OP OBSERVER
0500 PM SNOW DENVER INTL AIRPORT 39.87N 104.67W
01/31/2011 M0.5 INCH DENVER CO TRAINED SPOTTER
1 INCH ON THE GROUND. CURRENTLY LIGHT FLURRIES.
0445 PM SNOW 1 NE LITTLETON 39.60N 105.00W
01/31/2011 M1.5 INCH ARAPAHOE CO TRAINED SPOTTER
0439 PM SNOW 4 S EVERGREEN 39.58N 105.34W
01/31/2011 M0.7 INCH JEFFERSON CO TRAINED SPOTTER
LIGHT SNOW ALL DAY
0426 PM SNOW 3 W GREELEY 40.42N 104.80W
01/31/2011 M1.2 INCH WELD CO NWS EMPLOYEE
ROADS ICY IN SPOTS
0236 PM SNOW 1 SW WESTMINSTER 39.87N 105.06W
01/31/2011 M1.1 INCH JEFFERSON CO TRAINED SPOTTER
0140 PM SNOW 2 SW BOULDER 40.01N 105.28W
01/31/2011 M1.3 INCH BOULDER CO NWS EMPLOYEE
DAVID SKAGGS RESEARCH CENTER NOAA
&&
BENTONThe national radar mosaic for the moment the first event began.
3 extreme cold/wind chill. 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, February 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: 285597, 285598, 285600.