Very strong winds developed in parts of the high country in the presence of an amplifed mountain wave. A peak wind gust of 133 mph (116 kts) was recorded 3 miles south-southeast of Rollinsville with 93 mph (81 kts) atop Niwot Ridge.
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The episode as NWS BOU wrote it up.
Very strong winds developed in parts of the high country in the presence of an amplifed mountain wave. A peak wind gust of 133 mph (116 kts) was recorded 3 miles south-southeast of Rollinsville with 93 mph (81 kts) atop Niwot Ridge. In parts of the Northeast Plains, strong winds were also observed. Peak wind reports included: 71 mph at Crook, 70 mph at Fort Morgan, 69 mph, 15 miles west-northwest of Sterling, 67 mph, 3 miles southwest of Fleming and 14 miles northwest of Otis, 65 mph (57 kts) at Merino, 64 mph (56 kts) at Windsor, 62 mph (54 kts) at Akron and Briggsdale, and 59 mph (51 kts) at Fleming.
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 12, 3:00 AM MST, 3 hours 55 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 300 AM MST SAT NOV 12 2005 .SHORT TERM...UPR TROF OVER NORTHEAST COLORADO THIS MORNING IS PROGGED TO MOVE INTO CNTRL NEBRASKA BY MIDDAY. PCPN HAS FILLED IN AS SOME WRAP AROUND MSTR HAS MOVED BACK INTO THE URBAN CORRIDOR. MDLS BOTH SHOW MSTR DCRG AFTER 12Z ALONG THE URBAN CORRIDOR. FOR THIS REASON WILL GO WITH SCT VS LIKELY POPS UNTIL AROUND 15 OR 16Z. STG NWLY WINDS ARE PROGGED TO DEVELOP OVER THE NORTHEAST PLAINS THIS AFTN WITH STG WND ALF AND DECENT SFC PRESSURE GRADIENT IN PLACE. NOT SURE WARNING CRITERIA WILL BE MET BUT WILL MENTION GUSTS IN THE 50-55 MPH RANGE TODAY. DAY SHIFT WILL NEED TO WATCH THIS CLOSELY. AS FOR PCPN...MSTR SHUD START TO WIND DOWN TOWARD 18Z AS SUBSIDENCE DEVELOPS. NAM/GFS SHOW PRETTY GOOD DOWNWARD QG OMEGA BY THIS AFTN. IN THE MTNS...SPATIAL CROSS-SECTIONS INDICATED MSTR WILL CONTINUE IN THE 750-650 MB LAYER TODAY WITH FVBL OROGRPAPHICS IN PLACE WITH WLY WINDS AROUND 30 KTS AT 700 MB. SNOW MODEL GENERATED UP TO 3 INCHES THROUGH 00Z...MOST OF THIS SHUD FALL IN THE MORNING. WITH FAIRLY DECENT WINDS IN PLACE...HAVE OPTED TO EXTEND THE SNOW AND BLOWING SNOW ADVISORY UNTIL NOON TODAY. FOR TNGT...A STG BUT DRIER NWLY FLOW ALOFT WILL BE OVER THE CWFA. A WEAK FRONTAL SURGE IS PROGGED TO MOVE INTO THE NORTHEAST PLAINS OVERNIGHT. SOUNDINGS INDICATE THE LOWER LEVELS WILL RMN DRY BUT MSTR DOES INCREASE AROUND 700 MB. AS A RESULT...SHUD SEE A FAIRLY DECENT MID LVL CLOUD DECK DVLP TNGT. IN THE MTNS...MSTR NEAR MTN TOP IN PROGGED TO DCRS BUT ENUF OF AN OROGRAPHIC COMPONENT FOR THE SLGT CHC TNGT. .LONG TERM...A STRONG NW FLOW PATTERN WILL BE OVER CO FOR SUN-TUE WITH STRONG 130KT JET CORE NOSING INTO CO SUN NITE AND MON AM. SNOW AND WINDS WILL BE INCREASING AGAIN OVER THE MTNS THRU THIS PRD WITH STILL THE POTENTIAL OF SOME HI WINDS SUN NITE AND MONDAY. HOWEVER... WEAK MTN TOP INVERSIONS AND STRONG WIND SHEAR WITH THE JET SHOULD KEEP THE STRONGEST WINDS OVER HIGHER ELEVATIONS. WITH THE SNOW AND WINDS...ADVISORIES MAY BE NEEDED EVENTUALLY FOR THE MOUNTAINS. ACROSS LOWER ELEVATIONS...COLD FRONT WILL MOVE INTO NERN CO MONDAY AFTN/EVENING TIME FRAME WITH MUCH COLDER AIRMASS MOVING IN. THERE ARE SOME MOISTURE DIFFERENCES BETWEEN THE NAM AND GFS...WITH THE GFS SHOWING MORE MSTR AND LIGHT QPF OVER MUCH OF THE PLAINS LATE MON NITE. GIVEN THE STRONG JET OVERHEAD WOULD TEND TO FAVOR THE GFS AT THIS TIME. WILL KEEP CURRENT FCSTS AS IS FOR NOW. GFS SEEMS TO BE HAVING A BETTER TRACK RECORD LATELY WITH MSTR/QPF FORECASTS. DRYING AND WARMING TREND TOWARDS THE MIDDLE OF THE WEEK WITH RISING HEIGHTS AND RIDGE ALOFT BUILDING OVER REGION. LATEST GFS AS CHANGED SOMEWHAT TOWARDS THE END OF THE WEEK WITH THE RIDGE ALOFT DISPLACED FURHTER WEST OFF WEST COAST. THIS IS ALLOWING MORE SURGES OF COOLER AIR TO MOVE IN FROM THE NORTH. WILL COOL THE TEMP GRIDS DOWNWARD A BIT LATER IN THE WEEK. .BOU WATCHES/WARNINGS/ADVISORIES...SNOW AND BLOWING SNOW ADVISORY EXTENDED UNTIL NOON DAY FOR MOUNTAINS...ZONES 31..33..34. && COOPER/ENTREKIN
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 531 AM MST SAT NOV 12 2005 COZ030>051-121800- 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- 531 AM MST SAT NOV 12 2005 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT A STORM SYSTEM OVER NORTHEAST COLORADO THIS MORNING WILL MOVE INTO NEBRASKA BY EARLY THIS AFTERNOON. IN THE MOUNTAINS...A SNOW AND BLOWING SNOW ADVISORY IS IN EFFECT FOR THE NORTH CENTRAL MOUNTAINS OF COLORADO THROUGH NOON TODAY. OROGRAPHIC SNOW SHOWERS WILL CONTINUE THROUGH MUCH OF THE DAY WITH AN ADDITIONAL 1 TO 3 INCHES OF SNOW EXPECTED. STRONG WEST TO NORTHWEST WINDS 20 TO 35 MPH WITH GUSTS TO 60 MPH ABOVE TIMBERLINE WILL CAUSE AREAS OF BLOWING AND DRIFTING SNOW. ACROSS THE NORTHEAST PLAINS...RAIN SHOWERS WILL DIMINISH LATER THIS MORNING BUT THE WIND WILL INCREASE. A STRONG NORTHWESTERLY FLOW ALOFT WILL COMBINE WITH A FAIRLY STRONG SURFACE PRESSURE GRADIENT. NORTHWEST WINDS 20 TO 35 MPH WILL BE COMMON WITH GUSTS RANGING FROM 45 MPH TO 55 MPH. .DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY A STRONG NORTHWEST FLOW PATTERN WILL DEVELOP ACROSS THE STATE ON SUNDAY AND STRENGTHEN SUNDAY NIGHT AND MONDAY. GUSTY WINDS AND SNOW WILL REDEVELOP OVER THE MOUNTAINS LATE SUNDAY WITH GUSTS IN EXCESS OF 60 MPH EXPECTED. A STRONG COLD FRONT WILL MOVE INTO EASTERN COLORADO LATE MONDAY AFTERNOON WITH MUCH COOLER TEMPERATURES EXPECTED ON TUESDAY WITH A CHANCE OF SNOW SHOWERS. DRY AND WARMER TEMPERATURES ARE EXPECTED BY THE MIDDLE OF THE WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. COOPER/ENTREKIN
The national radar mosaic for the moment the first event began.
8 high wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2005Every state in 2005This day in weather historyWarnings in Colorado, November 2005
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: 5485637, 5485639, 5485641, 5485638, 5485640, 5485642, 5485643, 5485644.