Another winter storm brought heavy snow to portions of the Urban Corridor and Northeast Plains. Storm totals generally ranged from 3 to 7 inches, with locally heavier bands producing up to 11 inches of snowfall.
Every event with a place to put it; 10 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.
Another winter storm brought heavy snow to portions of the Urban Corridor and Northeast Plains. Storm totals generally ranged from 3 to 7 inches, with locally heavier bands producing up to 11 inches of snowfall.
Along the Urban Corridor storm totals included: 11 inches, 7 miles southeast of Loveland; 10 inches at 3 miles west of Berthoud, 10 miles south-southeast of Buckley AFB and Castle Pines; 9.5 inches 4 miles south-southeast of Aurora and Kassler; 8.5 inches near Bellvue and Ft. Collins; 7.5 inches, 2 miles southeast of Highlands Ranch; 7 inches in Aurora and Sedalia; 6.5 inches in Arvada, 4 miles east of Denver and Lafayette; 6 inches at Castle Rock and Thornton.
Across the Northeast Plains storm totals included: 9 inches in Greeley; 8 inches at Hugo and 3 miles northeast of Wiggins; 7.5 inches, 4 miles west-southwest of Eaton; 7 inches at Ft. Morgan, Karval, and Windsor; 6.5 inches at Agate; 6 inches at Arriba and 6 miles south of New Raymer.
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 Dec 27, 4:30 AM MST, 0 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 430 AM MST THU DEC 27 2007 .SHORT TERM...MANY DELIBERATIONS THIS MORNING...BUT OVERALL CHANGES WERE MINOR. STORM IS STILL ON TRACK TO MOVE ACROSS NORTHERN NEW MEXICO WITH THE BEST LIFT ALOFT SOUTH OF OUR CWA...BUT QG SURFACE SURFACE VERTICAL VELOCITY IS MAXIMIZED OVER THE PALMER DIVIDE 12Z TO 00Z. IT HAS BEEN SNOWING OVER THE MOUNTAINS OVERNIGHT AND HAS BEEN SPREADING ACROSS THE URBAN CORRIDOR AND PLAINS SINCE 3AM. THERE WERE SOME CONFLICTING SIGNALS THIS MORNING. THERE IS NO STRONG PUSH OF HIGH PRESSURE FROM THE NORTH...AS A RESULT UPSLOPE WILL BE WEAK. SURFACE LOW IS A LITTLE FAR SOUTH...AND A LACK OF PRESSURE GRADIENT WILL KEEP WIND SPEEDS MOSTLY LESS THAN 20 MPH TODAY. MOISTURE UPSTREAM HAS BEEN MARGINAL...BUT AMPLE LIFT WILL ALLOW SOUNDINGS TO BECOME SATURATED TODAY. NET RESULT...WINTER STORM WARNING REMAINS IN EFFECT FOR PALMER DIVIDE...SOUTHERN FRONT RANGE FOOTHILLS...DENVER METRO AREA EASTWARD TO WASHINGTON AND LINCOLN COUNTIES. SNOW AMOUNTS WILL RANGE FROM AROUND 5 INCHES AT DIA TO 10 INCHES IN THE FOOTHILLS. THE SNOW AND BLOWING SNOW ADVISORY HAS BEEN CHANGED TO A SNOW ADVISORY...AND THE NORTHERN FRONT RANGE HAS BEEN ADDED...AS RADAR SHOWS THIS AREA TO BE VERY ACTIVE THIS MORNING. SNOWFALL AMOUNTS WILL BE 3 TO 6 INCHES...WITH 4 TO 8 INCHES IN THE NORTHERN FRONT RANGE FOOTHILLS. THIS EVENING THE STORM WILL LESSEN ITS GRIP ON OUR AREA...AND SNOW WILL BEGIN TO LESSEN FROM WEST TO EAST. SOUNDINGS WILL REMAIN QUITE COLD AND QUITE MOIST...SO CLOUDS WILL LINGER FOR A WHILE...BUT SOME CLEARING LATE WILL ALLOW TEMPERATURES TO DROP TO NEAR ZERO ON THE PLAINS. FOG IS NOT IN THE FORECAST FOR TONIGHT...BUT MAY BE ADDED IF SKIES BEGIN TO CLEAR FASTER THAN CURRENTLY ANTICIPATED. .LONG TERM...FOR FRIDAY...THE UPPER LOW WILL LIFT OUT ACROSS THE CENTRAL PLAINS WHILE A STRONG ZONAL NW FLOW PATTERN BEGINS TO SET UP ACROSS CO. CLEARING SKIES FOR THE EASTERN PLAINS FRI AM BUT CLOUDS AND SHSN WILL BE INCREASING AGAIN OVER THE MTNS. CROSS SECTIONS SHOW MSTR MORE ON THE SHALLOW SIDE BUT INCREASING OROGRAPHIC FLOW AND MODEST LAPSE RATES WILL RESULT IN SOME LIGHT SNOW ACCUMLATIONS IN THE HIGHER MOUNTAINS. TEMPERATURES ON FRIDAY WILL STILL BE QUITE COLD WITH READINGS REMAINING IN THE 20S OVER THE PLAINS WITH STRONG LOW LVL INVERSIONS REMAINING IN PLACE. STRONG 140+ KT JET NOSES INTO WRN CO FOR THE WEEKEND AND EXPECT SOME ACCUMLATING SNOWS IN THE MTNS WITH GOOD OROGRAPHIC FLOW AND INCREASING 700MB WINDS. EXPECT SOME SORT OF SNOW/WIND HILITES WILL BE NEEDED THIS WEEKEND. MAY ALSO BE A POTENTIAL HI WIND EVENT ACROSS THE FRONT RANGE EAST SLOPES/FOOTHILLS SAT NITE AND INTO SUNDAY AS 50-70KT CROSS MTN FLOW AND HIGH STABILITY AT MTN TOP. THERE MAY BE A TOO MUCH SPEED SHEAR IN THE VERTICAL BUT WILL WAIT AND SEE. DEFINITELY WINDY AS SFC PRESS GRADIENT ACROSS THE MTNS TIGHTENS TO NEAR 13 MB BETWEEN DEN-GJT. THE FLOW ALOFT WILL GRADUALLY WEAKEN TOWARDS THE MIDDLE OF NEXT WEEK AS RIDGING ALOFT BUILDS ACROSS THE WEST. OVERALL...PERIODIC SNOWS AND WINDY PERIODS IN THE MTNS AND GENERALLY DRY AND BREEZY ACROSS THE PLAINS. && .AVIATION...LIGHT SNOW HAS BEGUN...AND WILL CONTINUE THROUGH THE DAY. A WEAK UPSLOPE GRADIENT WILL BE IN PLACE THROUGH THE DAY. THE HEAVIEST SNOW WILL OCCUR TODAY UNTIL MID AFTERNOON...AND IFR CEILINGS AND VISIBILITIES WILL PREVAIL FOR THIS PERIOD. && .BOU WATCHES/WARNINGS/ADVISORIES...WINTER STORM WARNING IN EFFECT FROM 5 AM TO 11 PM MST THURSDAY FOR ZONES 036...039...040...041...044...045...046...047...AND 049... ...SNOW AND BLOWING SNOW ADVISORY IN EFFECT FROM 5 AM TO 11 PM MST THURSDAY FOR ZONES 035...038...042...043...048...050...AND 051... && RTG/SWE
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1058 AM MST WED DEC 26 2007 COZ030>051-271300- 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- 1058 AM MST WED DEC 26 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT SCATTERED SNOW SHOWERS WILL DEVELOP IN THE MOUNTAINS THIS AFTERNOON...BECOMING MORE WIDESPREAD TONIGHT WITH ACCUMULATIONS OF 1 TO 4 INCHES. ACROSS THE LOWER ELEVATIONS...LIGHT SNOW WILL DEVELOP LATER TONIGHT WITH ACCUMULATIONS OF UP TO AN INCH BY DAWN. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SNOW IS EXPECTED OVER THE PLAINS...FOOTHILLS...AND MOUNTAINS EAST OF THE DIVIDE ON THURSDAY...DECREASING THURSDAY EVENING. ACCUMULATIONS OF 3 TO 8 INCHES ARE POSSIBLE. NORTH WINDS UP TO 25 MPH WILL CAUSE SOME BLOWING AND DRIFTING SNOW OUT ON THE PLAINS. A CHANCE OF SNOW WILL CONTINUE OVER THE MOUNTAINS THROUGH THE WEEKEND INTO MONDAY WITH DRY CONDITIONS EXPECTED ON THE PLAINS THROUGH NEXT WEDNESDAY. TEMPERATURES LOOK TO BE BELOW NORMAL THROUGH MONDAY...THEN MODERATE SOMEWHAT INTO MID WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. DL/RJK
The national radar mosaic for the moment the first event began.
10 winter storm. Local standard time, as filed.
Storm totals ranged from 5 to 11 inches.
Storm totals ranged from 3 to 6 inches.
Storm totals ranged from 4 to 9 inches.
Storm totals ranged from 4 to 10 inches.
Storm totals ranged from 4 to 10 inches.
Storm totals ranged from 5 to 8 inches.
Storm totals ranged from 3 to 7 inches.
Storm totals ranged from 3 to 8 inches.
Storm totals ranged from 3 to 7 inches.
Storm totals ranged from 3 to 6 inches.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Colorado in 2007Every state in 2007This day in weather historyWarnings in Colorado, December 2007
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: 65727, 65728, 65729, 65730, 65731, 65732, 65734, 65735, 65736, 65737.