Localized high winds developed above timberline. Peak wind gusts included 86 mph near Berthoud Pass, and 78 mph atop Niwot Ridge.
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.
Localized high winds developed above timberline. Peak wind gusts included 86 mph near Berthoud Pass, and 78 mph atop Niwot Ridge. In addition, strong post frontal winds blew the roof of a mobile home in Thornton.
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 Nov 9, 9:33 PM MST, 2 hours 56 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER/BOULDER CO 933 PM MST SUN NOV 9 2014 .UPDATE... ISSUED AT 933 PM MST SUN NOV 9 2014 ONLY SUBTLE CHANGES NEEDED TO THE FORECAST AT THIS TIME. MODELS NOW INDICATE THAT THE FRONT WILL MOVE ACROSS NORTHEAST COLORADO FROM LATE IN THE MORNING THROUGH MID-AFTERNOON. FRONTAL PASSAGE SHOULD ROLL THROUGH DENVER AROUND 2 PM. GUSTY WINDS WILL BE THE MAIN FEATURE AS THE FRONT MOVES THROUGH AS THE FRONT WILL BE PUSHED THROUGH BY STRONG PRESSURE RISES. HAVE REMOVED THE MENTION OF FREEZING DRIZZLE FROM THE FORECAST...SINCE THE GUSTY WINDS WILL KEEP THE LOW LEVELS WELL MIXED AS THE UPSLOPE CLOUDINESS DEVELOPS. ALSO EXPECT THE SNOWFALL TO BE LIGHT WHEN IT DEVELOPS. MOISTURE WILL BE LACKING BEHIND THE FRONT DUE TO HOW COLD THE AIRMASS WILL BE GETTING. && .SHORT TERM...(THIS EVENING THROUGH MONDAY) ISSUED AT 350 PM MST SUN NOV 9 2014 STRONG POLAR JET TO OUR NORTH IS FORECAST TO SAG SOUTHWARD OVER NORTHERN COLORADO BY MONDAY MORNING. THE WELL ADVERTISED ARCTIC FRONT SITS NEARLY STATIONARY ACROSS SERN MONTANA...EXTREME NORTHEAST WYOMING AND WRN SOUTH DAKOTA AT THIS HOUR. LACK OF PRESSURE RISES BEHIND THE FRONT AND A JET NEARLY PARALLEL TO THE FRONT WOULD EXPLAIN THE LACK OF FORWARD PROGRESS IN THIS FRONT. ABOUT A 40DEG F TEMP GRADIENT THROUGH THE FRONTAL ZONE...WITH AREAS OF LIGHT SNOW NORTH OF THE FRONT. CLOSER TO HOME...THE CROSS MTN PRESSURE GRADIENT HAS EASED SOME...BUT WITH THE MTN WAVE MOVING AWAY FROM THE FRONT RANGE HAVE NOTICED A STEADY INCREASE IN WEST-SOUTHWESTERLY WINDS MTNS...FOOTHILLS AND NEARBY PLAINS. OVERNIGHT...SHOULD SEE CROSS MTN WINDS STRENGTHENING AS THE SUBSIDENT SIDE OF THE POLAR JET PASSES OVER THE FRONT RANGE AND THE MTN WAVE REFORMS LATE TONIGHT AND EARLY MONDAY MORNING. X-SECTION WIND COMPONENT NEAR MTN TOP LEVEL MAXING OUT AROUND 65 KTS AROUND 12Z/MONDAY. APPEARS MOST OF THIS MOMENTUM WILL REMAIN CONCENTRATED AT MTN TOP LEVEL AND UPPER EAST SLOPES OF THE FRONT RANGE. HOWEVER WITH THE ARCTIC FRONT NEARING...MODELS SHOW WIND SPEEDS ALSO INCREASING ALONG THE FOOTHILLS WITH GUSTS APPROACHING 30KTS ON THE PLAINS. TEMPERATURES OVERNIGHT SHOULD REMAIN QUITE MILD...ESPLY IN THE WINDIER AREAS ALONG THE BASE OF THE FOOTHILLS. BY MORNING MORNING...NAM...WRF...RAP AND HRRR ALL SHOW THE ARCTIC FRONT STILL NORTH OF THE CWA AND GUSTY NWLY WINDS SPREADING OVER THE PLAINS. IN THE HIGH COUNTRY...SHOULD SEE PRECIP STEADILY INCREASING THE MID TO LATE MORNING HOURS AS LIFT AND MOISTURE INCREASE WITH THE POLAR JET PASSING OVERHEAD. COULD SEE HIGH WINDWARD SLOPES RECEIVING 1 INCH/HOUR SNOWFALL RATES BY AFTERNOON. BACK TO THE PLAINS...MODELS SHOW THE LEADING EDGE OF ARCTIC AIR REACHING THE WYOMING/COLORADO STATE LINE BY AROUND 18Z...THEN RACING SOUTH ACROSS THE PLAINS WITH 30-40KT NLY WINDS. COLD AIR WILL BE SHALLOW TO START OUT...SO NOT MUCH IN THE WAY OF PRECIP ON THE PLAINS...AT LEAST NOT UNTIL THE COLD AIR RUNS UP AGAINST THE FOOTHILLS AND PALMER DIVIDE DURING THE MID TO LATE AFTERNOON HOURS. COMBINATION OF OROGRAPHICS AND LIFT PROVIDED BY THE PASSING JET COULD PRODUCE 0.5 TO 1.5 INCHES OF SNOW UP AGAINST THE FOOTHILLS...ACRS PARTS OF THE DENVER METRO AREA AND THE PALMER DIVIDE BY 6 PM MST...WITH SLIGHTLY HIGHER AMOUNTS IN THE FOOTHILLS. MODELS SOUNDINGS ALSO SUGGEST A BRIEF PERIOD OF FREEZING DRIZZLE WITH THE LIGHT RAIN/SNOW BEFORE CHANGING TO ALL SNOW BY DARK. AGAIN THIS WEATHER SYSTEM WAS NEVER EXPECTED TO PRODUCE MUCH SNOW...JUST VERY COLD TEMPERATURES. .LONG TERM...(MONDAY NIGHT THROUGH SUNDAY) ISSUED AT 350 PM MST SUN NOV 9 2014 OVERALL FORECAST IS ON TRACK FOR ARCTIC OUTBREAK LEADING TO MUCH COLDER TEMPERATURES AND PERIODS OF LIGHT SNOW THIS WEEK. FOR MONDAY EVENING...THE MAIN BAND OF SNOW WILL BE SHIFTING OVER SOUTHERN PORTIONS OF CWA WITH JUST LINGERING FLURRIES LATE MONDAY NIGHT AND TUESDAY AS MOISTURE DEPTH BECOMES MORE SHALLOW. MUCH COLDER AIRMASS IN PLACE FOR TUESDAY WITH TEMP READINGS STRUGGLE TO REACH 20 DEGREES. THE NEXT UPPER LEVEL WAVE AND REINFORCING SHOT OF COLD AIR WILL MOVE INTO NORTHEAST COLORADO LATE TUESDAY WITH BEST SHOT OF SNOW LATE TUESDAY NIGHT AND WEDNESDAY. THIS PERIOD LOOKS LIKE THE BEST OF THE WEEK FOR ACCUMULATION SNOWFALL WITH A COUPLE OF INCHES POSSIBLE WITH JET STREAK ACROSS SOUTHEAST WY AND NEBRASKA PANHANDLE. WEDNESDAY WILL ALSO BE THE COLDEST DAY OF THE WEEK WITH READINGS ONLY IN THE TEENS AND WOULDN'T BE SURPRISED IF WE BARELY MAKE 10 DEGREES. BY THURSDAY AND FRIDAY THERE WILL BE SOME SLIGHT MODIFICATION TO THE COLD AIRMASS WHILE THE MOISTURE AND SNOWFALL WILL THEN SHIFT MORE INTO THE MOUNTAINS AND LOCATIONS WEST OF THE DIVIDE. PACIFIC ORIGIN MOISTURE WILL MOVE INTO NORTHERN COLORADO MOUNTAINS ON THURSDAY AND CONTINUE ON FRIDAY WITH DECENT OROGRAPHIC FLOW. EXPECT SOME MODEST ACCUMULATIONS FOR THE MOUNTAINS DURING THIS PERIOD. FORECAST FOR THIS WEEKEND A BIT MORE IFFY AS MODEL SOLUTIONS BEGIN TO DIVERGE WITH EUROPEAN SOLUTION SHOWING A DEEPER TROF DEVELOPING OVER GREAT BASIN. THE GFS ON THE OTHER HAND SHOWING A WEAK AND MORE OPEN TROF IN NORTHWEST ZONAL FLOW PATTERN. WILL MAINTAIN BELOW NORMAL TEMPERATURES AND A SLIGHT CHANCE OF SNOW THROUGH THE WEEKEND PERIOD FOR NOW. && .AVIATION...(FOR THE TAFS THROUGH 06Z MONDAY EVENING) ISSUED AT 933 PM MST SUN NOV 9 2014 VFR CEILINGS AND VISIBILITIES OVERNIGHT ALONG WITH WESTERLY WINDS WHICH WILL KEEP TEMPERATURES MILD. COLD FRONT AND NORTHERLY WINDS SHOULD ARRIVE AROUND 21Z/2 PM MST. SOME BLOWING DUST MAY ACCOMPANY THE FRONT AND THEN CEILINGS SHOULD DROP TO IFR/LOW MVFR BY EVENING AS SNOW SPREADS ACROSS THE DENVER AREA. SNOW ACCUMULATIONS COULD BE AROUND 1 TO 2 INCHES THROUGH THE LATE AFTERNOON AND EVENING. && .BOU WATCHES/WARNINGS/ADVISORIES... NONE. && UPDATE...DANKERS SHORT TERM...BAKER LONG TERM...SWE AVIATION...DANKERS
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER/BOULDER CO 1028 AM MST SUN NOV 9 2014 COZ030>051-101730- 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- 1028 AM MST SUN NOV 9 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT STRONG AND GUSTY WEST WINDS WILL CONTINUE ON THE MOUNTAIN RIDGES AND EAST FACING SLOPES OF THE FRONT RANGE...INCLUDING FOOTHILL AREAS OF LARIMER...BOULDER...JEFFERSON AND DOUGLAS COUNTIES THROUGH LATE TONIGHT. GUSTS IN THE 40 TO 60 MPH RANGE CAN BE EXPECTED OVER THIS HIGHER TERRAIN...WITH GUSTS APPROACHING 75 MPH POSSIBLE ON THE MOUNTAIN PEAKS AND RIDGES OVERNIGHT. AREAS NEAR THE BASE OF THE FOOTHILLS AND HIGHER AREAS UP NEAR THE WYOMING BORDER COULD ALSO SEE CHINOOK WINDS GUSTING TO AROUND 45 MPH AT TIMES LATER TODAY AND TONIGHT. OTHERWISE IT WILL BE AN UNSEASONABLY WARM DAY WITH NEAR RECORD HIGH TEMPERATURES POSSIBLE AT LOWER ELEVATIONS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY GUSTY WEST WINDS WILL DECREASE BY LATE MONDAY MORNING WITH SPEEDS UP TO 60 MPH OVER THE HIGH MOUNTAIN PASSES AND EAST SLOPES. A MAJOR CHANGE IN THE WEATHER PATTERN WILL BRING MUCH COLDER TEMPERATURES AND A CHANCE OF SNOW TO NORTHERN COLORADO THIS WEEK. ON MONDAY...TEMPERATURES WILL PLUMMET INTO THE 20S IN THE AFTERNOON FOLLOWING THE PASSAGE OF AN ARCTIC COLD FRONT. LIGHT SNOW WILL DEVELOP MONDAY AFTERNOON WITH AN INCH OR TWO OF ACCUMULATION POSSIBLE LATE MONDAY AFTERNOON AND EVENING. HIGH TEMPERATURES WILL STRUGGLE TO MAKE IT INTO THE TEENS TUESDAY THROUGH THURSDAY...WITH SOME SLIGHT MODIFICATION ON FRIDAY. TEMPERATURES WILL DROP INTO THE SINGLE DIGITS AT NIGHT ACROSS LOWER ELEVATIONS. ADDITIONAL LIGHT SNOWFALL IS EXPECTED LATE TUESDAY NIGHT AND WEDNESDAY WITH SOME LIGHT SNOW ACCUMULATIONS POSSIBLE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. BAKER/ENTREKIN
The national radar mosaic for the moment the first event began.
2 high wind, 1 strong wind. Local standard time, as filed.
Strong winds following the passage of an Arctic cold front blew the roof off a mobile home in Thornton.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2014Every state in 2014This day in weather historyWarnings in Colorado, November 2014
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: 550031, 550032, 550035.