High winds developed in and near the foothills of Boulder and northern Jefferson Counties. Peak wind gusts included 81 mph at the National Wind Technology Center and 6 miles northwest of Boulder.
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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.
High winds developed in and near the foothills of Boulder and northern Jefferson Counties. Peak wind gusts included 81 mph at the National Wind Technology Center and 6 miles northwest of Boulder.
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 Feb 9, 4:00 AM MST, 1 hour 37 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 400 AM MST MON FEB 9 2009 .SHORT TERM...LIGHT PRECIP DEVELOPING IN THE WRAPAROUND REGION ALONG THE NORTHERN BORDER THIS MORNING. THIS WILL EVENTUALLY BE UNDERCUT BY WESTERLY WINDS AT LOW LEVELS...BUT THOSE HAVE NOT DEVELOPED WITH ANY STRENGTH YET. SO WE WILL HANG ON TO LOW POPS FROM DENVER NORTHWARD THIS MORNING. SLOWED DOWN THE DEVELOPMENT OF THE WIND A FEW HOURS...BUT IT WILL COME AND FORECAST SPEEDS LOOK OK. IT ALSO LOOKS LIKE THERE WILL BE MORE SNOW IN THE MOUNTAINS THAN WE HAD FORECAST. MOISTURE IS DECREASING BUT BETWEEN THE WINDS AND THE INSTABILITY WE WILL HAVE DURING THE DAY TODAY I KEPT THE SHOWERS GOING ALL DAY. POTENTIAL FOR SOME MORE SIGNIFICANT ACCUMULATIONS AROUND RABBIT EARS PASS WHERE THE WSW FLOW IS FAVORABLE...OTHERWISE STILL EXPECTING THE SNOW TO BE LIGHT. LOW LEVEL GRADIENT AND WINDS ALOFT BOTH RELAX THIS EVENING SO SURFACE WINDS SHOULD DECREASE AS WELL. MODELS SHOW A LITTLE MOISTURE AS WARM ADVECTION CLOUD COVER TRIES TO DEVELOP AHEAD OF THE NEXT SYSTEM BUT WE WIND UP IN A COL IN THE WIND FIELD SO FORCING SHOULD BE WEAK. WILL LEAVE SOME MOUNTAIN SHOWERS AND SOME CLOUD COVER THAT WE HAVE IN THE FORECAST ALONE. .LONG TERM...OVERALL THE TIMING AND TRACK OF THE NEXT COUPLE OF SYSTEMS REMAIN CONSISTENT. ON TUESDAY...THE NEXT SYSTEM WL BE NEAR THE FOUR CORNERS AREA AT 12Z AND IS THEN PROGGED TO PASS ACROSS CO THROUGH THE DAY. THE STRONGEST QG ASCENT ASSOCIATED WITH THIS TROF IS STILL EXPECTED REMAIN SOUTH OF THE CWFA. SPATIAL CROSS SECTIONS ARE NOT VERY IMPRESSIVE IN THE MOUNTAINS IN TERMS OF MSTR OR OROGRAPHICS...BUT BOTH SHUD BE SUFFICIENT FOR AT LEAST SOME LIGHT SNOW ACCUMULATIONS. AS FOR THE NERN PLAINS...BEST CHC OF PCPN WILL LIKELY BE ALONG THE PALMER DIVIDE. THERE WILL MAY ALSO BE SOME LOW LVL QG ASCENT LATE TUESDAY AFTN/EVNG ASSOCIATED WITH A COLD FRONT THAT WL MOVE INTO THE REGION. IN ANY EVENT...QPF FIELDS SHOW VERY MINIMAL PCPN AMOUNTS AT THIS TIME...SO WL STICK WITH SLGT CHC POPS. LATE TUESDAY NIGHT INTO WEDNESDAY...THIS SYSTEM WILL MOVE EAST WITH A SHORT WAVE RIDGE MOVING OVER THE STATE. THE RIDGE AXIS IS EXPECTED TO MOVE INTO ERN CO BY 00Z THURSDAY. ASIDE FM SOME LINGERING POPS IN THE MTNS...IT SHUD BE DRY ONCE AGAIN. THE NEXT SYSTEM IN THIS PROGRESSIVE PATTERN IS STILL EXPECTED TO MOVE ACROSS CO THURSDAY NIGHT INTO FRIDAY. THE GFS HAS A MORE NORTHERN TRACK IN THE LATEST RUN...WITH MORE FVBL QG ASCENT PROGGED FOR NRN CO ON FRIDAY. TOO EARLY TO TELL MUCH AT THIS POINT BUT ITS AT LEAST MORE PROMISING THAN TUESDAYS STORM SYSTEM. WL CARRY CHC POPS IN THE MTNS THROUGH FRIDAY EVNG AND MAINTAIN SLIGHT CHC POPS OVER THE NERN PLAINS. THERE WILL BE ANOTHER BREAK FRIDAY NIGHT WITH ANOTHER WEAK TROF PROGGED TO MOVE INTO SRN CO BY SATURDAY AFTN/EVNG. WL LEAVE THOSE GRIDS AS IS FOR THE WEEKEND. && .AVIATION...FOG IN THE DENVER AREA WILL DISSIPATE BY SUNRISE AS WEST TO SOUTHWEST WINDS KICK IN. JUST A SLIGHT CHANCE OF SPRINKLES OR FLURRIES EARLY THIS MORNING...THEN WEST WINDS WILL BE THE MAIN ISSUE WITH GUSTS TO AROUND 25 KNOTS DURING THE DAY. WINDS WILL DECREASE AND BECOME MORE SOUTHWESTERLY AROUND SUNSET. && .BOU WATCHES/WARNINGS/ADVISORIES...NONE. GIMMESTAD/COOPER
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1104 AM MST SUN FEB 08 2009 COZ030>051-091300- 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- 1104 AM MST SUN FEB 08 2009 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT AREAS OF LIGHT SNOW WILL DEVELOP ACROSS THE MOUNTAINS THIS AFTERNOON...MAINLY ALONG AND SOUTH OF INTERSTATE WHERE ACCUMULATIONS OF UP TO 2 INCHES ARE POSSIBLE. THE SNOW WILL INCREASE OVER THE HIGH COUNTRY TONIGHT...WITH ADDITIONAL SNOW ACCUMULATIONS OF 2 TO 4 INCHES EXPECTED. ACROSS THE PLAINS...SCATTERED RAIN SHOWERS...MIXED AT TIMES WITH SNOW...WILL DEVELOP THIS AFTERNOON AND CONTINUE INTO THE EVENING HOURS. THE RAIN WILL CHANGE TO SNOW AFTER MIDNIGHT... WITH ACCUMULATIONS UP TO AN INCH NEAR NEAR THE EASTERN BORDER. A LARGE STORM SYSTEM MOVING FROM THE SOUTHWEST INTO THE CENTRAL ROCKIES WILL BRING MOISTURE AND INSTABILITY TO COLORADO PRODUCING THE SHOWER ACTIVITY. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY SCATTERED RAIN AND SNOW SHOWERS WILL DIMINISH OVER THE NORTHEAST PLAINS BY MONDAY AFTERNOON AS STRONG WESTERLY WINDS DEVELOP ACROSS THE FRONT RANGE. SPEEDS OF 20 TO 30 MPH WITH GUSTS TO 60 MPH ARE POSSIBLE ACROSS THE MOUNTAINS AND EAST SLOPES...WHILE WINDS WILL INCREASE TO 20 TO 35 MPH OVER THE PLAINS BY MONDAY AFTERNOON. SNOW SHOWERS WILL DECREASE ACROSS THE MOUNTAINS MONDAY AFTERNOON WITH ADDITIONAL ACCUMULATIONS OF 1 TO 3 INCHES POSSIBLE. THE NEXT STORM SYSTEM WILL QUICKLY MOVE ACROSS THE REGION ON TUESDAY WITH ANOTHER CHANCE OF SNOW ACROSS THE MOUNTAINS...BUT JUST A SLIGHT CHANCE OF SHOWERS ACROSS LOWER ELEVATIONS TUESDAY AFTERNOON. DRIER AND WARMER ON WEDNESDAY BEFORE THE NEXT DISTURBANCE BRINGS ANOTHER CHANCE OF SNOW TO THE MOUNTAINS LATER THURSDAY AND FRIDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. D-L/SWE
The national radar mosaic for the moment the first event began.
2 high wind. Local standard time, as filed.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2009Every state in 2009This day in weather historyWarnings in Colorado, February 2009
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: 153260, 153261.