Alert archive / Colorado / Winter Storm Warnings in 2011
Winter Storm Warning 17, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this winter storm warning at Dec 21, 2011, 4:33 AM MST for 12 counties in Colorado. It took effect at Dec 21, 2011, 5:00 PM MST. It was in force for 18 hr. 60 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Dec 21, 2011, 4:33 AM MST (11:33 UTC)
- In effect from
- Dec 21, 2011, 5:00 PM MST
- Expired
- Dec 22, 2011, 11:00 AM MST
- In force
- 18 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Clear Creek County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Gilpin County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO
The radar
The Denver radar (KFTG), 44 km from the middle of the area, began a volume at 11:29 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Dec 21, 6:13 PM MST | SNOW 0.5 | Golden, CO | |
| Dec 21, 6:30 PM MST | SNOW 1 | 2 Nnw Longmont, CO | SNOWFALL RATE ONE AND ONE HALF TO TWO INCHES PER HOUR |
| Dec 21, 6:45 PM MST | SNOW 1 | 1 S Evergreen, CO | |
| Dec 21, 7:00 PM MST | SNOW 1 | 2 S Denver, CO | |
| Dec 21, 7:00 PM MST | SNOW 1.5 | 1 Nw Erie, CO | |
| Dec 21, 7:00 PM MST | SNOW 1.9 | 3 W Jamestown, CO | |
| Dec 21, 7:05 PM MST | SNOW 1.5 | 4 Ene Nederland, CO | |
| Dec 21, 7:15 PM MST | SNOW 1.4 | 2 Ssw Boulder, CO | NWS OFFICE AT DAVID SKAGGS RESEARCH CENTER |
| Dec 21, 7:23 PM MST | SNOW 1.3 | Thornton, CO | |
| Dec 21, 7:30 PM MST | SNOW 2 | 5 W Loveland, CO | |
| Dec 21, 7:38 PM MST | SNOW 2 | 2 Wsw Broomfield, CO | |
| Dec 21, 7:43 PM MST | SNOW 2 | 2 Ssw Longmont, CO | |
| Dec 21, 8:00 PM MST | SNOW 2.2 | 3 Nw Castle Rock, CO | |
| Dec 21, 8:00 PM MST | SNOW 2.3 | 1 Sw Westminster, CO | |
| Dec 21, 8:00 PM MST | SNOW 2.5 | 3 Nw Golden, CO | ONE INCH OF SNOW PAST HOUR |
| Dec 21, 8:00 PM MST | SNOW 3 | 3 N Black Hawk, CO | SNOWFALL RATE ONE INCH PER HOUR |
| Dec 21, 8:10 PM MST | SNOW 3 | 2 Ssw Boulder, CO | NWS OFFICE AT DAVID SKAGGS RESEARCH CENTER...ONE INCH SNOW PAST HOUR |
| Dec 21, 8:20 PM MST | SNOW 2 | 3 S Estes Park, CO | |
| Dec 21, 8:23 PM MST | SNOW 2.1 | Ese Castle Pines, CO | |
| Dec 21, 8:25 PM MST | SNOW 3.3 | 1 Ssw Lafayette, CO | |
| Dec 21, 8:30 PM MST | SNOW 2.8 | Genesee, CO | |
| Dec 21, 8:30 PM MST | SNOW 3.5 | 4 Ene Nederland, CO | |
| Dec 21, 8:46 PM MST | SNOW 3 | 1 Nw Erie, CO | |
| Dec 21, 9:00 PM MST | SNOW 3 | 2 S Boulder, CO | |
| Dec 21, 9:00 PM MST | SNOW 5.6 | 7 Sw Boulder, CO | COAL CREEK CANYON |
| Dec 21, 9:01 PM MST | SNOW 3.2 | 3 Nw Castle Rock, CO | 1 INCH IN LAST HOUR. |
| Dec 21, 9:01 PM MST | SNOW 4 | Evergreen, CO | |
| Dec 21, 9:01 PM MST | SNOW 4.8 | 12 Nw Golden, CO | 2.4 INCHES IN LAST HOUR |
| Dec 21, 9:03 PM MST | SNOW 2.7 | 3 Se Denver, CO | |
| Dec 21, 9:03 PM MST | SNOW 4 | Genesee, CO | |
| Dec 21, 9:11 PM MST | SNOW 4 | 2 Wsw Highlands Ranch, CO | |
| Dec 21, 9:13 PM MST | SNOW 3.8 | 4 S Evergreen, CO | |
| Dec 21, 9:17 PM MST | HEAVY SNOW 6 | 7 Sw Boulder, CO | |
| Dec 21, 9:30 PM MST | SNOW 4.5 | 4 N Black Hawk, CO | |
| Dec 21, 9:34 PM MST | SNOW 5.5 | 4 Ene Conifer, CO | |
| Dec 21, 9:35 PM MST | SNOW 4.6 | Genesee, CO | 1.8 INCHES PAST HOUR. |
| Dec 21, 9:38 PM MST | SNOW 4 | 2 Ene Bergen Park, CO | |
| Dec 21, 9:57 PM MST | SNOW 3 | 1 W Northglenn, CO | |
| Dec 21, 10:01 PM MST | SNOW 5.8 | 4 Sse Pinecliffe, CO | 1.1 INCHES PAST HOUR |
| Dec 21, 10:40 PM MST | SNOW 4.7 | 3 Ssw Castle Pines, CO | |
| Dec 21, 10:44 PM MST | SNOW 5.3 | 4 Ene Nederland, CO | |
| Dec 21, 10:49 PM MST | SNOW 4.4 | 2 Sw Golden, CO | |
| Dec 21, 10:50 PM MST | SNOW 4 | 5 Sw Denver, CO | |
| Dec 21, 10:55 PM MST | SNOW 3.6 | Broomfield, CO | |
| Dec 21, 11:00 PM MST | SNOW 3 | 3 Ene Cameron Pass, CO | JOE WRIGHT SNOTEL |
| Dec 21, 11:00 PM MST | SNOW 4 | 5 Nnw Longs Peak, CO | BEAR LAKE SNOTEL |
| Dec 21, 11:00 PM MST | HEAVY SNOW 6 | Berthoud Pass, CO | BERTHOUD SUMMIT SNOTEL |
| Dec 21, 11:00 PM MST | HEAVY SNOW 6 | Echo Lake, CO | ECHO LAKE SNOTEL |
| Dec 21, 11:00 PM MST | HEAVY SNOW 6 | Eldora, CO | LAKE ELDORA SNOTEL |
| Dec 21, 11:01 PM MST | HEAVY SNOW 7 | 4 Sse Pinecliffe, CO | 1.3 INCHES PAST HOUR |
| Dec 21, 11:38 PM MST | SNOW 1 | 3 Ene Fort Collins, CO | |
| Dec 21, 11:45 PM MST | SNOW 5 | 1 Nw Erie, CO | |
| Dec 21, 11:54 PM MST | SNOW 2.7 | 2 N Loveland, CO | |
| Dec 21, 11:59 PM MST | HEAVY SNOW 6.1 | 3 N Conifer, CO | |
| Dec 22, 12:01 AM MST | SNOW 1.5 | 4 S Fort Collins, CO | |
| Dec 22, 12:01 AM MST | SNOW 3.2 | Denver Intl Airport, CO | |
| Dec 22, 12:01 AM MST | SNOW 4.6 | 1 Ese Wheat Ridge, CO | |
| Dec 22, 12:01 AM MST | HEAVY SNOW 11 | 3 W Jamestown, CO | |
| Dec 22, 12:07 AM MST | SNOW 4.5 | 5 Sw Denver, CO | |
| Dec 22, 12:07 AM MST | HEAVY SNOW 6.7 | 1 Ssw Lafayette, CO |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 11.6 hours before the alert went out and 156 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2176 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 40 m²/s²
- 0-3 km storm-relative helicity
- 164 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
651 WWUS45 KBOU 211133 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 433 AM MST WED DEC 21 2011 ...SNOW AND COLD TO HIT COLORADO TONIGHT AND THURSDAY... .AN UPPER LEVEL LOW WILL DROP SOUTH FROM THE NORTHERN ROCKIES ACROSS THE CENTRAL ROCKIES TONIGHT AND THURSDAY. AT THE SURFACE...A STRONG COLD FRONT WILL PUSH THROUGH COLORADO THIS EVENING. LARGE SCALE LIFT FROM THE UPPER LEVEL LOW COMBINED WITH A MOIST UPSLOPE FLOW AT THE SURFACE WILL PRODUCE WIDESPREAD SNOW TONIGHT AND THURSDAY MORNING. NORTH TO NORTHEAST WINDS WILL INCREASE TO 10 TO 20 MPH BEHIND THE FRONT WITH GUSTS TO 30 MPH EAST OF INTERSTATE 25. ROADWAYS WILL BECOME SNOW COVERED AND SLIPPERY WITH POOR VISIBILITIES DUE TO BLOWING SNOW. COZ035-036-211945- /O.UPG.KBOU.WS.A.0014.111222T0000Z-111222T1800Z/ /O.NEW.KBOU.WS.W.0017.111222T0000Z-111222T1800Z/ 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- INCLUDING THE CITIES OF...ESTES PARK...GLENDEVEY...NEDERLAND... RED FEATHER LAKES...BAILEY...CENTRAL CITY...EVERGREEN... GEORGETOWN...IDAHO SPRINGS...WESTCREEK 433 AM MST WED DEC 21 2011 ...WINTER STORM WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM WARNING FOR HEAVY SNOW...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * TIMING...SNOW WILL DEVELOP BY EARLY EVENING IN THE NORTHERN FOOTHILLS AND SPREAD SOUTH DURING THE EVENING WITH HEAVY SNOW AT TIMES OVERNIGHT THROUGH THURSDAY MORNING. THE SNOW WILL TAPER OFF FROM NORTH TO SOUTH BY THURSDAY AFTERNOON. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 8 TO 16 INCHES. * IMPACTS...PEOPLE PLANNING TRAVEL IN THE FOOTHILLS OF NORTHERN COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... COMMUTERS SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION THURSDAY MORNING. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && && $$ COZ039>041-211945- /O.UPG.KBOU.WS.A.0014.111222T0000Z-111222T1800Z/ /O.NEW.KBOU.WS.W.0017.111222T0000Z-111222T1800Z/ BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY- ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- INCLUDING THE CITIES OF...ARVADA...BOULDER...GOLDEN...LAKEWOOD... LONGMONT...AURORA...BRIGHTON...CITY OF DENVER... DENVER INTERNATIONAL AIRPORT...HIGHLANDS RANCH...LITTLETON... PARKER...CASTLE ROCK...ELBERT...KIOWA...LARKSPUR...SIMLA 433 AM MST WED DEC 21 2011 ...WINTER STORM WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM WARNING FOR SNOW AND BLOWING SNOW...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * TIMING...SNOW WILL DEVELOP ACROSS THE FRONT RANGE URBAN CORRIDOR EARLY THIS EVENING AND BECOME HEAVY AT TIMES OVERNIGHT INTO THURSDAY MORNING. THE SNOW WILL TAPER OFF BY MIDDAY ON THURSDAY. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 6 TO 8 INCHES... WITH UP TO 10 INCHES POSSIBLE OVER THE SOUTHERN AND WESTERN SUBURBS OF DENVER AND OVER THE PALMER DIVIDE. NORTH TO NORTHEAST WINDS OF 10 TO 20 MPH WILL OCCUR WITH GUSTS TO 30 MPH ALONG AND EAST OF INTERSTATE 25. * IMPACTS...PEOPLE PLANNING TRAVEL ACROSS THE FRONT RANGE URBAN CORRIDOR SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING AND BLOWING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... COMMUTERS SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION THURSDAY MORNING. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ $$ COZ038-043-045-046-211945- /O.UPG.KBOU.WS.A.0014.111222T0000Z-111222T1800Z/ /O.NEW.KBOU.WW.Y.0050.111222T0000Z-111222T1800Z/ LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- CENTRAL AND SOUTH WELD COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY- INCLUDING THE CITIES OF...FORT COLLINS...HEREFORD...LOVELAND... NUNN...EATON...FORT LUPTON...GREELEY...ROGGEN...BENNETT...BYERS... DEER TRAIL...LEADER...AGATE...HUGO...LIMON...MATHESON 433 AM MST WED DEC 21 2011 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * TIMING...SNOW WILL ENTER NORTHERN COLORADO LATE THIS AFTERNOON AND SPREAD SOUTHWARD DURING THIS EVENING. THE SNOW WILL TAPER OFF BY THURSDAY MORNING. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 3 TO 6 INCHES...NORTH TO NORTHEAST WINDS OF 10 TO 20 MPH WILL OCCUR WITH GUSTS TO 30 MPH. * IMPACTS...PEOPLE PLANNING TRAVEL ACROSS NORTHEAST COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING AND BLOWING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... COMMUTERS SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION THURSDAY MORNING. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ031-033-034-037-211945- /O.NEW.KBOU.WW.Y.0050.111222T0000Z-111222T1800Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 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-CENTRAL AND SOUTHEAST PARK COUNTY- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK...FAIRPLAY...HARTSEL... LAKE GEORGE...SOUTH PARK 433 AM MST WED DEC 21 2011 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY. * TIMING...SNOW WILL DEVELOP BY LATE AFTERNOON IN THE MOUNTAINS AND CONTINUE OVERNIGHT THROUGH THURSDAY MORNING. THE SNOW SHOULD BEGIN TO TAPER OFF BY THURSDAY AFTERNOON. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 6 TO 12 INCHES WITH THE HIGHEST AMOUNTS ON EAST FACING SLOPES. * IMPACTS...PEOPLE PLANNING TRAVEL IN THE MOUNTAINS OF NORTHERN COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING IN THE MOUNTAINS TONIGHT AND THURSDAY SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ042-044-211945- /O.NEW.KBOU.WW.Y.0050.111222T0000Z-111222T1800Z/ NORTHEAST WELD COUNTY-MORGAN COUNTY- INCLUDING THE CITIES OF...BRIGGSDALE...GROVER...PAWNEE BUTTES... RAYMER...STONEHAM...BRUSH...FORT MORGAN...GOODRICH...WIGGINS 433 AM MST WED DEC 21 2011 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY. * TIMING...SNOW WILL ENTER NORTHERN COLORADO LATE THIS AFTERNOON AND SPREAD SOUTHWARD DURING THIS EVENING. THE SNOW WILL TAPER OFF BY THURSDAY MORNING. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 2 TO 4 INCHES...NORTH TO NORTHEAST WINDS OF 10 TO 20 MPH WILL OCCUR WITH GUSTS TO 30 MPH. * IMPACTS...PEOPLE PLANNING TRAVEL ACROSS NORTHEAST COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING AND BLOWING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING OVER THE PLAINS OF NORTHEAST COLORADO TONIGHT AND THURSDAY MORNING SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$
6 follow-up statements
853 WWUS45 KBOU 211627 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 927 AM MST WED DEC 21 2011 ...SNOW AND COLD TO HIT COLORADO TONIGHT AND THURSDAY... .AN UPPER LEVEL LOW WILL DROP SOUTH FROM THE NORTHERN ROCKIES ACROSS THE CENTRAL ROCKIES TONIGHT AND THURSDAY. AT THE SURFACE... A STRONG COLD FRONT WILL PUSH THROUGH COLORADO THIS EVENING. LARGE SCALE LIFT FROM THE UPPER LEVEL LOW COMBINED WITH A MOIST UPSLOPE FLOW AT THE SURFACE WILL PRODUCE WIDESPREAD SNOW TONIGHT AND THURSDAY MORNING. NORTH TO NORTHEAST WINDS WILL INCREASE TO 10 TO 20 MPH BEHIND THE FRONT WITH GUSTS TO 30 MPH EAST OF INTERSTATE 25. ROADWAYS WILL BECOME SNOW COVERED AND SLIPPERY WITH POOR VISIBILITIES DUE TO SNOW AND BLOWING SNOW. COZ035-036-220200- /O.CON.KBOU.WS.W.0017.111222T0000Z-111222T1800Z/ 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- INCLUDING THE CITIES OF...ESTES PARK...GLENDEVEY...NEDERLAND... RED FEATHER LAKES...BAILEY...CENTRAL CITY...EVERGREEN... GEORGETOWN...IDAHO SPRINGS...WESTCREEK 927 AM MST WED DEC 21 2011 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY. * TIMING...SNOW WILL DEVELOP BY EARLY EVENING IN THE NORTHERN FOOTHILLS AND SPREAD SOUTH DURING THE EVENING WITH HEAVY SNOW AT TIMES OVERNIGHT THROUGH THURSDAY MORNING. THE SNOW WILL TAPER OFF FROM NORTH TO SOUTH BY THURSDAY AFTERNOON. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 8 TO 16 INCHES. * IMPACTS...PEOPLE PLANNING TRAVEL IN THE FOOTHILLS OF NORTHERN COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... COMMUTERS SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION THURSDAY MORNING. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && && $$ COZ039>041-220200- /O.CON.KBOU.WS.W.0017.111222T0000Z-111222T1800Z/ BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY- ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- INCLUDING THE CITIES OF...ARVADA...BOULDER...GOLDEN...LAKEWOOD... LONGMONT...AURORA...BRIGHTON...CITY OF DENVER... DENVER INTERNATIONAL AIRPORT...HIGHLANDS RANCH...LITTLETON... PARKER...CASTLE ROCK...ELBERT...KIOWA...LARKSPUR...SIMLA 927 AM MST WED DEC 21 2011 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY. * TIMING...SNOW WILL DEVELOP ACROSS THE FRONT RANGE URBAN CORRIDOR EARLY THIS EVENING AND BECOME HEAVY AT TIMES OVERNIGHT INTO THURSDAY MORNING. THE SNOW WILL TAPER OFF BY MIDDAY ON THURSDAY. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 6 TO 10 INCHES... WITH UP TO 12 INCHES POSSIBLE OVER THE SOUTHERN AND WESTERN SUBURBS OF DENVER AND OVER THE PALMER DIVIDE. NORTH TO NORTHEAST WINDS OF 10 TO 20 MPH WILL OCCUR WITH GUSTS TO 30 MPH ALONG AND EAST OF INTERSTATE 25. * IMPACTS...PEOPLE PLANNING TRAVEL ACROSS THE FRONT RANGE URBAN CORRIDOR SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING AND BLOWING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... COMMUTERS SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION THURSDAY MORNING. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ030-032-220200- /O.EXA.KBOU.WW.Y.0050.111222T0000Z-111222T1800Z/ JACKSON COUNTY BELOW 9000 FEET- GRAND AND SUMMIT COUNTIES BELOW 9000 FEET- INCLUDING THE CITIES OF...GOULD...NORTH PARK...RAND...SPICER... WALDEN...DILLON...FRASER...GRANBY...GRAND LAKE... HOT SULPHUR SPRINGS...KREMMLING 927 AM MST WED DEC 21 2011 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY. * TIMING...SNOW WILL DEVELOP BY LATE AFTERNOON IN THE MOUNTAINS AND CONTINUE OVERNIGHT THROUGH THURSDAY MORNING. THE SNOW SHOULD BEGIN TO TAPER OFF BY THURSDAY AFTERNOON. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 3 TO 7 INCHES. * IMPACTS...PEOPLE PLANNING TRAVEL IN THE MOUNTAINS OF NORTHERN COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING IN THE MOUNTAINS TONIGHT AND THURSDAY SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ031-033-034-037-220200- /O.CON.KBOU.WW.Y.0050.111222T0000Z-111222T1800Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-CENTRAL AND SOUTHEAST PARK COUNTY- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK...FAIRPLAY...HARTSEL... LAKE GEORGE...SOUTH PARK 927 AM MST WED DEC 21 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY. * TIMING...SNOW WILL INCREASE LATE THIS AFTERNOON IN THE MOUNTAINS AND CONTINUE OVERNIGHT THROUGH THURSDAY MORNING. THE SNOW SHOULD BEGIN TO TAPER OFF BY THURSDAY AFTERNOON. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 6 TO 12 INCHES WITH THE HIGHEST AMOUNTS ON EAST FACING SLOPES. * IMPACTS...PEOPLE PLANNING TRAVEL IN THE MOUNTAINS OF NORTHERN COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING IN THE MOUNTAINS TONIGHT AND THURSDAY SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ038-042>046-220200- /O.CON.KBOU.WW.Y.0050.111222T0000Z-111222T1800Z/ LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- 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- INCLUDING THE CITIES OF...FORT COLLINS...HEREFORD...LOVELAND... NUNN...BRIGGSDALE...GROVER...PAWNEE BUTTES...RAYMER...STONEHAM... EATON...FORT LUPTON...GREELEY...ROGGEN...BRUSH...FORT MORGAN... GOODRICH...WIGGINS...BENNETT...BYERS...DEER TRAIL...LEADER... AGATE...HUGO...LIMON...MATHESON 927 AM MST WED DEC 21 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY. * TIMING...SNOW WILL ENTER NORTHERN COLORADO LATE THIS AFTERNOON AND SPREAD SOUTHWARD DURING THIS EVENING. THE SNOW WILL TAPER OFF BY THURSDAY MORNING. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 3 TO 6 INCHES...NORTH TO NORTHEAST WINDS OF 10 TO 20 MPH WILL OCCUR WITH GUSTS TO 30 MPH. * IMPACTS...PEOPLE PLANNING TRAVEL ACROSS NORTHEAST COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING AND BLOWING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING OVER THE PLAINS OF NORTHEAST COLORADO TONIGHT AND THURSDAY MORNING SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$
384 WWUS45 KBOU 212244 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 344 PM MST WED DEC 21 2011 ...SNOW AND COLD STILL ON TRACK TO HIT COLORADO TONIGHT AND THURSDAY... .AN UPPER LEVEL LOW OVER NORTHEAST UTAH WILL DROP SLOWLY SOUTHWARD ACROSS EASTERN UTAH TONIGHT AND THEN INTO NORTHEAST ARIZONA ON THURSDAY. AT THE SURFACE...A COLD FRONT WILL PUSH ACROSS NORTHEAST COLORADO THIS EVENING. LARGE SCALE LIFT FROM THE UPPER LEVEL LOW COMBINED WITH A DEEPENING AND STRENGTHENING UPSLOPE FLOW BEHIND THE COLD FRONT WILL PRODUCE WIDESPREAD SNOW. THE SNOW WILL GRADUALLY DEVELOP AND SPREAD SOUTHWARD ACROSS THE AREA THIS EVENING...AND THEN BECOME HEAVIER BY OR SHORTLY BEFORE MIDNIGHT. TONIGHT AND THURSDAY MORNING. TRAVEL WILL BE HAZARDOUS WITH SNOW COVERED AND ICY ROADS. TRAVEL ON SECONDARY ROADS MAY BECOME DIFFICULT OR IMPOSSIBLE IN LOCATIONS IN AND NEAR THE FOOTHILLS WHERE A FOOT OR MORE OF SNOW MAY FALL. COZ035-036-220645- /O.CON.KBOU.WS.W.0017.111222T0000Z-111222T1800Z/ 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- INCLUDING THE CITIES OF...ESTES PARK...GLENDEVEY...NEDERLAND... RED FEATHER LAKES...BAILEY...CENTRAL CITY...EVERGREEN... GEORGETOWN...IDAHO SPRINGS...WESTCREEK 344 PM MST WED DEC 21 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY. * TIMING...SNOW WILL DEVELOP EARLY THIS EVENING AND THEN BECOME HEAVY AT TIMES BY MIDNIGHT. SNOWFALL RATES OF 1 TO 2 INCHES PER CAN BE EXPECTED FROM MIDNIGHT THROUGH EARLY THURSDAY MORNING. THE SNOW WILL TAPER OFF FROM NORTH TO SOUTH BY THURSDAY AFTERNOON. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 8 TO 16 INCHES. LOCAL AMOUNTS UP TO 20 INCHES ARE POSSIBLE IN THE FAVORED FOOTHILL LOCATIONS FROM WEST OF BOULDER THROUGH THE GENESEE AREA. * IMPACTS...PEOPLE PLANNING TRAVEL IN THE FOOTHILLS OF NORTHERN COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. SECONDARY ROADS MAY BECOME IMPASSABLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... COMMUTERS SHOULD ALLOW CONSIDERABLE TIME TO REACH YOUR DESTINATION THURSDAY MORNING. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ039>041-220645- /O.CON.KBOU.WS.W.0017.111222T0000Z-111222T1800Z/ 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- INCLUDING THE CITIES OF...ARVADA...BOULDER...GOLDEN...LAKEWOOD... LONGMONT...AURORA...BRIGHTON...CITY OF DENVER... DENVER INTERNATIONAL AIRPORT...HIGHLANDS RANCH...LITTLETON... PARKER...CASTLE ROCK...ELBERT...KIOWA...LARKSPUR...SIMLA 344 PM MST WED DEC 21 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY. * TIMING...SNOW WILL DEVELOP EARLY THIS EVENING AND THEN BECOME HEAVY AT TIMES BY MIDNIGHT. SNOWFALL RATES AROUND 1 INCH PER CAN BE EXPECTED FROM MIDNIGHT THROUGH EARLY THURSDAY MORNING. THE SNOW WILL TAPER OFF BY LATE THURSDAY MORNING. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 6 TO 12 INCHES...WITH THE HEAVIEST AMOUNTS OVER THE SOUTHERN AND WESTERN SUBURBS OF DENVER AND OVER THE PALMER DIVIDE. NORTH TO NORTHEAST WINDS OF 10 TO 20 MPH WILL OCCUR WITH GUSTS TO 30 MPH ALONG AND EAST OF INTERSTATE 25. * IMPACTS...PEOPLE PLANNING TRAVEL ACROSS THE FRONT RANGE URBAN CORRIDOR SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED DUE TO FALLING AND BLOWING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. SOME SECONDARY ROADS MAY BECOME IMPASSABLE ESPECIALLY IN AREAS THAT RECEIVE THE HEAVIEST SNOWFALL. PRECAUTIONARY/PREPAREDNESS ACTIONS... COMMUTERS SHOULD ALLOW CONSIDERABLE TIME TO REACH YOUR DESTINATION THURSDAY MORNING. WHEN DRIVING...SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ049-220645- /O.EXA.KBOU.WW.Y.0050.111222T0000Z-111222T1800Z/ WASHINGTON COUNTY- INCLUDING THE CITIES OF...AKRON...COPE...LAST CHANCE...OTIS 344 PM MST WED DEC 21 2011 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 11 AM MST THURSDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW...WHICH IS IN EFFECT UNTIL 11 AM MST THURSDAY. A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY. * TIMING...SNOW WILL SPREAD ACROSS THE NORTHEAST PLAINS OF COLORADO THIS EVENING AND THEN BECOME HEAVIER OVERNIGHT. THE SNOW WILL TAPER OFF EARLY THURSDAY MORNING. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 3 TO 6 INCHES...NORTH TO NORTHEAST WINDS OF 10 TO 20 MPH WILL OCCUR WITH GUSTS TO 30 MPH. * IMPACTS...PEOPLE PLANNING TRAVEL ACROSS NORTHEAST COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING AND BLOWING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING OVER THE PLAINS OF NORTHEAST COLORADO TONIGHT AND THURSDAY MORNING SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ031-033-034-037-220645- /O.CON.KBOU.WW.Y.0050.111222T0000Z-111222T1800Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 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-CENTRAL AND SOUTHEAST PARK COUNTY- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK...FAIRPLAY...HARTSEL... LAKE GEORGE...SOUTH PARK 344 PM MST WED DEC 21 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY. * TIMING...SNOW WILL INCREASE IN THE MOUNTAINS THIS EVENING AND CONTINUE OVERNIGHT THROUGH EARLY THURSDAY MORNING. THE SNOW WILL TAPER OFF BY LATE THURSDAY MORNING. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 8 TO 12 INCHES ON THE EASTERN SLOPE OF THE FRONT RANGE MOUNTAINS...WITH 4 TO 8 INCHES FOR SOUTH PARK...VALLEY LOCATIONS IN SUMMIT COUNTY...AND THE MOUNTAINS OF WESTERN GRAND AND JACKSON COUNTIES. * IMPACTS...PEOPLE PLANNING TRAVEL IN THE MOUNTAINS OF NORTHERN COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING IN THE MOUNTAINS TONIGHT AND THURSDAY SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION SAFELY. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ038-042>046-220645- /O.CON.KBOU.WW.Y.0050.111222T0000Z-111222T1800Z/ LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY- INCLUDING THE CITIES OF...FORT COLLINS...HEREFORD...LOVELAND... NUNN...BRIGGSDALE...GROVER...PAWNEE BUTTES...RAYMER...STONEHAM... EATON...FORT LUPTON...GREELEY...ROGGEN...BRUSH...FORT MORGAN... GOODRICH...WIGGINS...BENNETT...BYERS...DEER TRAIL...LEADER... AGATE...HUGO...LIMON...MATHESON 344 PM MST WED DEC 21 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY. * TIMING...SNOW WILL SPREAD ACROSS THE NORTHEAST PLAINS OF COLORADO THIS EVENING AND THEN BECOME HEAVIER OVERNIGHT. THE SNOW WILL TAPER OFF EARLY THURSDAY MORNING. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 3 TO 6 INCHES. NORTH TO NORTHEAST WINDS OF 10 TO 20 MPH WILL OCCUR WITH GUSTS TO 30 MPH. * IMPACTS...PEOPLE PLANNING TRAVEL ACROSS NORTHEAST COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING AND BLOWING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING OVER THE PLAINS OF NORTHEAST COLORADO TONIGHT AND THURSDAY MORNING SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ030-032-220645- /O.CON.KBOU.WW.Y.0050.111222T0000Z-111222T1800Z/ JACKSON COUNTY BELOW 9000 FEET- GRAND AND SUMMIT COUNTIES BELOW 9000 FEET- INCLUDING THE CITIES OF...GOULD...NORTH PARK...RAND...SPICER... WALDEN...DILLON...FRASER...GRANBY...GRAND LAKE... HOT SULPHUR SPRINGS...KREMMLING 344 PM MST WED DEC 21 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY. * TIMING...SNOW WILL INCREASE ACROSS THE HIGH MOUNTAIN VALLEYS THIS EVENING AND CONTINUE OVERNIGHT THROUGH EARLY THURSDAY MORNING. THE SNOW SHOULD BEGIN TO TAPER OFF BY LATE THURSDAY MORNING. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 3 TO 7 INCHES. * IMPACTS...PEOPLE PLANNING TRAVEL IN THE MOUNTAINS OF NORTHERN COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING IN THE MOUNTAINS TONIGHT AND THURSDAY SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ BARJENBRUCH
952 WWUS45 KBOU 212355 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 455 PM MST WED DEC 21 2011 ...SNOW AND COLD STILL ON TRACK TO HIT COLORADO TONIGHT AND THURSDAY... .AN UPPER LEVEL LOW OVER NORTHEAST UTAH WILL DROP SLOWLY SOUTHWARD ACROSS EASTERN UTAH TONIGHT AND THEN INTO NORTHEAST ARIZONA ON THURSDAY. AT THE SURFACE...A COLD FRONT WILL PUSH ACROSS NORTHEAST COLORADO THIS EVENING. LARGE SCALE LIFT FROM THE UPPER LEVEL LOW COMBINED WITH A DEEPENING AND STRENGTHENING UPSLOPE FLOW BEHIND THE COLD FRONT WILL PRODUCE WIDESPREAD SNOW. THE SNOW WILL GRADUALLY DEVELOP AND SPREAD SOUTHWARD ACROSS THE AREA THIS EVENING...AND THEN BECOME HEAVIER BY OR SHORTLY BEFORE MIDNIGHT. THE HEAVIER SNOW WILL CONTINUE INTO EARLY THURSDAY MORNING...BEFORE DECREASING FROM NORTH TO SOUTH ACROSS THE AREA LATE THURSDAY MORNING INTO EARLY AFTERNOON. TRAVEL WILL BE HAZARDOUS WITH SNOW COVERED AND ICY ROADS. TRAVEL ON SECONDARY ROADS MAY BECOME DIFFICULT OR IMPOSSIBLE IN AND NEAR THE FOOTHILLS WHERE A FOOT OR MORE OF SNOW MAY FALL. COZ035-036-220800- /O.CON.KBOU.WS.W.0017.111222T0000Z-111222T1800Z/ 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- INCLUDING THE CITIES OF...ESTES PARK...GLENDEVEY...NEDERLAND... RED FEATHER LAKES...BAILEY...CENTRAL CITY...EVERGREEN... GEORGETOWN...IDAHO SPRINGS...WESTCREEK 455 PM MST WED DEC 21 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY. * TIMING...SNOW WILL SPREAD ACROSS THE FOOTHILLS EARLY THIS EVENING AND THEN BECOME HEAVY AT TIMES BY MIDNIGHT. SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR CAN BE EXPECTED FROM MIDNIGHT THROUGH EARLY THURSDAY MORNING. THE SNOW WILL TAPER OFF FROM NORTH TO SOUTH BY THURSDAY AFTERNOON. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 8 TO 16 INCHES. LOCAL AMOUNTS UP TO 20 INCHES ARE POSSIBLE IN THE FAVORED FOOTHILL LOCATIONS FROM WEST OF BOULDER THROUGH THE GENESEE AREA. * IMPACTS...PEOPLE PLANNING TRAVEL IN THE FOOTHILLS OF NORTHERN COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. SECONDARY ROADS MAY BECOME IMPASSABLE. PRECAUTIONARY/PREPAREDNESS ACTIONS... COMMUTERS SHOULD ALLOW CONSIDERABLE TIME TO REACH YOUR DESTINATION THURSDAY MORNING. WHEN DRIVING...SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ039>041-220800- /O.CON.KBOU.WS.W.0017.111222T0000Z-111222T1800Z/ 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- INCLUDING THE CITIES OF...ARVADA...BOULDER...GOLDEN...LAKEWOOD... LONGMONT...AURORA...BRIGHTON...CITY OF DENVER... DENVER INTERNATIONAL AIRPORT...HIGHLANDS RANCH...LITTLETON... PARKER...CASTLE ROCK...ELBERT...KIOWA...LARKSPUR...SIMLA 455 PM MST WED DEC 21 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY. * TIMING...SNOW WILL DEVELOP EARLY THIS EVENING AND THEN BECOME HEAVY AT TIMES BY MIDNIGHT. SNOWFALL RATES AROUND 1 INCH PER HOUR CAN BE EXPECTED FROM MIDNIGHT THROUGH EARLY THURSDAY MORNING. THE SNOW WILL TAPER OFF BY LATE THURSDAY MORNING. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 6 TO 12 INCHES...WITH THE HEAVIEST AMOUNTS OVER THE SOUTHERN AND WESTERN SUBURBS OF DENVER AND OVER THE PALMER DIVIDE. NORTH TO NORTHEAST WINDS OF 10 TO 20 MPH WILL OCCUR WITH GUSTS TO 30 MPH ALONG AND EAST OF INTERSTATE 25. * IMPACTS...PEOPLE PLANNING TRAVEL ACROSS THE FRONT RANGE URBAN CORRIDOR SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED DUE TO FALLING AND BLOWING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. SOME SECONDARY ROADS MAY BECOME IMPASSABLE ESPECIALLY IN AREAS THAT RECEIVE THE HEAVIEST SNOWFALL. PRECAUTIONARY/PREPAREDNESS ACTIONS... COMMUTERS SHOULD ALLOW CONSIDERABLE TIME TO REACH YOUR DESTINATION THURSDAY MORNING. WHEN DRIVING...SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ031-033-034-037-220800- /O.CON.KBOU.WW.Y.0050.111222T0000Z-111222T1800Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 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-CENTRAL AND SOUTHEAST PARK COUNTY- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK...FAIRPLAY...HARTSEL... LAKE GEORGE...SOUTH PARK 455 PM MST WED DEC 21 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY. * TIMING...SNOW WILL INCREASE IN THE MOUNTAINS THIS EVENING AND CONTINUE OVERNIGHT THROUGH EARLY THURSDAY MORNING. THE SNOW WILL TAPER OFF BY LATE THURSDAY MORNING. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 8 TO 12 INCHES ON THE EASTERN SLOPE OF THE FRONT RANGE MOUNTAINS... WITH 4 TO 8 INCHES FOR SOUTH PARK...VALLEY LOCATIONS IN SUMMIT COUNTY...AND THE MOUNTAINS OF WESTERN GRAND AND JACKSON COUNTIES. * IMPACTS...PEOPLE PLANNING TRAVEL IN THE MOUNTAINS OF NORTHERN COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING IN THE MOUNTAINS TONIGHT AND THURSDAY SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION SAFELY. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ038-042>046-049-220800- /O.CON.KBOU.WW.Y.0050.111222T0000Z-111222T1800Z/ LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- 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-WASHINGTON COUNTY- INCLUDING THE CITIES OF...FORT COLLINS...HEREFORD...LOVELAND... NUNN...BRIGGSDALE...GROVER...PAWNEE BUTTES...RAYMER...STONEHAM... EATON...FORT LUPTON...GREELEY...ROGGEN...BRUSH...FORT MORGAN... GOODRICH...WIGGINS...BENNETT...BYERS...DEER TRAIL...LEADER... AGATE...HUGO...LIMON...MATHESON...AKRON...COPE...LAST CHANCE... OTIS 455 PM MST WED DEC 21 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY. * TIMING...SNOW WILL SPREAD ACROSS THE NORTHEAST PLAINS OF COLORADO THIS EVENING AND THEN BECOME HEAVIER OVERNIGHT. THE SNOW WILL TAPER OFF EARLY THURSDAY MORNING. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 3 TO 6 INCHES. NORTH TO NORTHEAST WINDS OF 10 TO 20 MPH WILL OCCUR WITH GUSTS TO 30 MPH. * IMPACTS...PEOPLE PLANNING TRAVEL ACROSS NORTHEAST COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING AND BLOWING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING OVER THE PLAINS OF NORTHEAST COLORADO TONIGHT AND THURSDAY MORNING SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ030-032-220800- /O.CON.KBOU.WW.Y.0050.111222T0000Z-111222T1800Z/ JACKSON COUNTY BELOW 9000 FEET- GRAND AND SUMMIT COUNTIES BELOW 9000 FEET- INCLUDING THE CITIES OF...GOULD...NORTH PARK...RAND...SPICER... WALDEN...DILLON...FRASER...GRANBY...GRAND LAKE... HOT SULPHUR SPRINGS...KREMMLING 455 PM MST WED DEC 21 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY. * TIMING...SNOW WILL INCREASE ACROSS THE HIGH MOUNTAIN VALLEYS THIS EVENING AND THEN CONTINUE THROUGH EARLY THURSDAY MORNING. THE SNOW SHOULD BEGIN TO TAPER OFF BY LATE THURSDAY MORNING. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 3 TO 7 INCHES. * IMPACTS...PEOPLE PLANNING TRAVEL IN THE MOUNTAINS OF NORTHERN COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING IN THE MOUNTAINS TONIGHT AND THURSDAY SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$
767 WWUS45 KBOU 220249 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 749 PM MST WED DEC 21 2011 ...WINTER STORM HITTING NORTHEAST AND NORTH CENTRAL COLORADO... .AN UPPER LEVEL LOW OVER NORTHEAST UTAH WILL DROP SLOWLY SOUTHWARD ACROSS EASTERN UTAH TONIGHT AND THEN INTO NORTHEAST ARIZONA ON THURSDAY. AT THE SURFACE...A COLD FRONT WILL PUSH ACROSS NORTHEAST COLORADO LATE THIS EVENING. LARGE SCALE LIFT FROM THE UPPER LEVEL LOW COMBINED WITH DEEPENING AND STRENGTHENING UPSLOPE FLOW BEHIND THE COLD FRONT WILL PRODUCE WIDESPREAD SNOW...WITH HEAVY SNOW IN AND NEAR THE FRONT RANGE FOOTHILLS AND URBAN CORRIDOR. THE HEAVIEST SNOWFALL IS EXPECTED TO OCCUR FROM MIDNIGHT TONIGHT INTO EARLY THURSDAY MORNING...BEFORE DECREASING FROM NORTH TO SOUTH ACROSS THE AREA LATE THURSDAY MORNING. TRAVEL WILL BE HAZARDOUS WITH SNOW COVERED AND ICY ROADS. TRAVEL ON SECONDARY ROADS MAY BECOME DIFFICULT OR IMPOSSIBLE IN AND NEAR THE FOOTHILLS WHERE A FOOT OR MORE OF SNOW MAY FALL. COZ035-036-221100- /O.CON.KBOU.WS.W.0017.000000T0000Z-111222T1800Z/ 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- INCLUDING THE CITIES OF...ESTES PARK...GLENDEVEY...NEDERLAND... RED FEATHER LAKES...BAILEY...CENTRAL CITY...EVERGREEN... GEORGETOWN...IDAHO SPRINGS...WESTCREEK 749 PM MST WED DEC 21 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY. * TIMING...SNOW...HEAVY AT TIMES...WILL CONTINUE THROUGH THURSDAY MORNING. SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR CAN BE EXPECTED FROM THIS EVENING THROUGH THROUGH EARLY THURSDAY MORNING. THE SNOW WILL TAPER OFF FROM NORTH TO SOUTH BY LATE THURSDAY MORNING INTO EARLY AFTERNOON. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 8 TO 16 INCHES. LOCAL AMOUNTS UP TO 20 INCHES ARE POSSIBLE IN THE FAVORED FOOTHILL LOCATIONS FROM WEST OF BOULDER THROUGH THE GENESEE AREA. * IMPACTS...PEOPLE PLANNING TRAVEL IN THE FOOTHILLS OF NORTHERN COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. SECONDARY ROADS MAY BECOME IMPASSABLE. VISIBILITIES WILL BE REDUCED TO JUST LESS THAN ONE QUARTER MILE DUE TO HEAVY FALLING SNOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... COMMUTERS SHOULD ALLOW CONSIDERABLE TIME TO REACH YOUR DESTINATION THURSDAY MORNING. WHEN DRIVING...SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ039>041-221100- /O.CON.KBOU.WS.W.0017.000000T0000Z-111222T1800Z/ BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY- ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- INCLUDING THE CITIES OF...ARVADA...BOULDER...GOLDEN...LAKEWOOD... LONGMONT...AURORA...BRIGHTON...CITY OF DENVER... DENVER INTERNATIONAL AIRPORT...HIGHLANDS RANCH...LITTLETON... PARKER...CASTLE ROCK...ELBERT...KIOWA...LARKSPUR...SIMLA 749 PM MST WED DEC 21 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY. * TIMING...SNOW...HEAVY AT TIMES...WILL CONTINUE THROUGH TONIGHT INTO EARLY THURSDAY MORNING WITH SNOWFALL RATES AROUND 1 INCH PER HOUR. THE SNOW WILL TAPER OFF BY LATE THURSDAY MORNING. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 7 TO 12 INCHES...WITH THE HEAVIEST AMOUNTS FROM BOULDER SOUTHWARD THROUGH THE WESTERN AND SOUTHERN SUBURBS OF DENVER AND OVER THE PALMER DIVIDE. NORTH TO NORTHEAST WINDS OF 10 TO 20 MPH WILL OCCUR WITH GUSTS TO 30 MPH ALONG AND EAST OF INTERSTATE 25. * IMPACTS...PEOPLE PLANNING TRAVEL ACROSS THE FRONT RANGE URBAN CORRIDOR SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS WITH SNOW COVERED AND ICY ROADS. SOME SECONDARY ROADS MAY BECOME IMPASSABLE ESPECIALLY IN AREAS THAT RECEIVE THE HEAVIEST SNOWFALL. THE THURSDAY MORNING COMMUTE WILL BE EXTREMELY SLOW. VISIBILITIES WILL BE REDUCED DUE TO FALLING AND BLOWING SNOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... COMMUTERS SHOULD ALLOW CONSIDERABLE TIME TO REACH YOUR DESTINATION SAFELY. WHEN DRIVING...SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ031-033-034-037-221100- /O.CON.KBOU.WW.Y.0050.000000T0000Z-111222T1800Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 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-CENTRAL AND SOUTHEAST PARK COUNTY- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK...FAIRPLAY...HARTSEL... LAKE GEORGE...SOUTH PARK 749 PM MST WED DEC 21 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY. * TIMING...SNOW WILL INCREASE IN THE MOUNTAINS THIS EVENING AND CONTINUE OVERNIGHT THROUGH EARLY THURSDAY MORNING. THE SNOW WILL TAPER OFF BY LATE THURSDAY MORNING. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 8 TO 12 INCHES ON THE EASTERN SLOPE OF THE FRONT RANGE MOUNTAINS...WITH 3 TO 8 INCHES FOR SOUTH PARK...VALLEY LOCATIONS IN SUMMIT COUNTY...AND THE MOUNTAINS OF WESTERN GRAND AND JACKSON COUNTIES. * IMPACTS...PEOPLE PLANNING TRAVEL IN THE MOUNTAINS OF NORTHERN COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING IN THE MOUNTAINS TONIGHT AND THURSDAY SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION SAFELY. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ038-042>046-049-221100- /O.CON.KBOU.WW.Y.0050.000000T0000Z-111222T1800Z/ LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY-WASHINGTON COUNTY- INCLUDING THE CITIES OF...FORT COLLINS...HEREFORD...LOVELAND... NUNN...BRIGGSDALE...GROVER...PAWNEE BUTTES...RAYMER...STONEHAM... EATON...FORT LUPTON...GREELEY...ROGGEN...BRUSH...FORT MORGAN... GOODRICH...WIGGINS...BENNETT...BYERS...DEER TRAIL...LEADER... AGATE...HUGO...LIMON...MATHESON...AKRON...COPE...LAST CHANCE... OTIS 749 PM MST WED DEC 21 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY. * TIMING...SNOW WILL SPREAD ACROSS THE NORTHEAST PLAINS OF COLORADO LATE THIS EVENING AND THEN BECOME HEAVIER OVERNIGHT. THE SNOW WILL TAPER OFF EARLY THURSDAY MORNING. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 3 TO 6 INCHES. UP TO 8 INCHES OF SNOWFALL WILL BE POSSIBLE FROM THE WESTERN SECTIONS OF FORT COLLINS INTO THE SOUTHWESTERN CORNER OF WELD COUNTY. NORTH TO NORTHEAST WINDS OF 10 TO 20 MPH WILL OCCUR WITH GUSTS TO 30 MPH. * IMPACTS...PEOPLE PLANNING TRAVEL ACROSS NORTHEAST COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING AND BLOWING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING OVER THE PLAINS OF NORTHEAST COLORADO TONIGHT AND THURSDAY MORNING SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ030-032-221100- /O.CON.KBOU.WW.Y.0050.000000T0000Z-111222T1800Z/ JACKSON COUNTY BELOW 9000 FEET- GRAND AND SUMMIT COUNTIES BELOW 9000 FEET- INCLUDING THE CITIES OF...GOULD...NORTH PARK...RAND...SPICER... WALDEN...DILLON...FRASER...GRANBY...GRAND LAKE... HOT SULPHUR SPRINGS...KREMMLING 749 PM MST WED DEC 21 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY. * TIMING...SNOW WILL INCREASE ACROSS THE HIGH MOUNTAIN VALLEYS THROUGH THE NIGHT AND THEN CONTINUE THROUGH EARLY THURSDAY MORNING. THE SNOW SHOULD BEGIN TO TAPER OFF BY LATE THURSDAY MORNING. * ACCUMULATION/WIND...SNOWFALL AMOUNTS WILL RANGE FROM 3 TO 7 INCHES. * IMPACTS...PEOPLE PLANNING TRAVEL IN THE MOUNTAINS OF NORTHERN COLORADO SHOULD BE PREPARED FOR HAZARDOUS DRIVING CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING SNOW. ROADWAYS WILL BECOME SNOW COVERED AND ICY CAUSING HAZARDOUS DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING IN THE MOUNTAINS TONIGHT AND THURSDAY SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ BARJENBRUCH
735 WWUS45 KBOU 221012 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 312 AM MST THU DEC 22 2011 ...WINTER STORM CONTINUES OVER NORTHEAST AND NORTH CENTRAL COLORADO... .A STORM SYSTEM CENTERED OVER NORTHEAST UTAH WILL DROP SLOWLY SOUTHWARD TODAY...CAUSING AN AREA OF SNOW TO MOVE SOUTHWARD ACROSS COLORADO. THE SNOW WILL DIMINISH ACROSS NORTHERN COLORADO THIS MORNING WHILE IT WILL CONTINUE OVER SOUTHERN COLORADO THROUGH THE DAY. TRAVEL WILL BE HAZARDOUS WITH SNOW COVERED AND ICY ROADS. TRAVEL ON SECONDARY ROADS MAY BECOME DIFFICULT OR IMPOSSIBLE IN AND NEAR THE FOOTHILLS WHERE A FOOT OF SNOW WILL FALL. TRAVELERS SHOULD CONSIDER WAITING UNTIL LATER TODAY FOR TRAVEL IN NORTHERN COLORADO...AND ADDITIONAL DELAYS OR ALTERNATE ROUTES MAY BE ADVISABLE FOR TRAVEL TO SOUTHERN COLORADO OR NEW MEXICO. SNOWFALL TOTALS AROUND THE DENVER AREA DURING THE LATE NIGHT HOURS WERE IN THE 5 TO 10 INCH RANGE...WITH UP TO 17 INCHES IN THE FOOTHILLS WEST OF BOULDER. COZ035-036-221800- /O.CON.KBOU.WS.W.0017.000000T0000Z-111222T1800Z/ 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- INCLUDING THE CITIES OF...ESTES PARK...GLENDEVEY...NEDERLAND... RED FEATHER LAKES...BAILEY...CENTRAL CITY...EVERGREEN... GEORGETOWN...IDAHO SPRINGS...WESTCREEK 312 AM MST THU DEC 22 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING. * TIMING...SNOW...HEAVY AT TIMES...WILL CONTINUE EARLY THIS MORNING...DIMINISHING BY MIDDAY. * ACCUMULATION/WIND...ADDITIONAL SNOWFALL OF 2 TO 6 INCHES IS EXPECTED TODAY. STORM TOTAL AMOUNTS WILL RANGE FROM 8 TO 16 INCHES. LOCAL AMOUNTS UP TO 20 INCHES ARE POSSIBLE IN THE FAVORED FOOTHILL LOCATIONS IN BOULDER AND NORTHERN JEFFERSON COUNTIES. * IMPACTS...ROADS WILL BE ICY AND SNOWPACKED. SECONDARY ROADS MAY BECOME IMPASSABLE AND VISIBILITY MAY BE LIMITED IN HEAVY SNOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... DRIVERS SHOULD ALLOW CONSIDERABLE EXTRA TIME THIS MORNING. CONSIDER DELAYING TRAVEL UNTIL CONDITIONS IMPROVE LATER TODAY. WHEN DRIVING...SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ039>041-221800- /O.CON.KBOU.WS.W.0017.000000T0000Z-111222T1800Z/ 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- INCLUDING THE CITIES OF...ARVADA...BOULDER...GOLDEN...LAKEWOOD... LONGMONT...AURORA...BRIGHTON...CITY OF DENVER... DENVER INTERNATIONAL AIRPORT...HIGHLANDS RANCH...LITTLETON... PARKER...CASTLE ROCK...ELBERT...KIOWA...LARKSPUR...SIMLA 312 AM MST THU DEC 22 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING. * TIMING...SNOW WILL GRADUALLY DIMINISH THIS MORNING. * ACCUMULATION/WIND...ADDITIONAL SNOWFALL OF 1 TO 3 INCHES IS EXPECTED TODAY. STORM TOTAL AMOUNTS WILL RANGE FROM 8 TO 14 INCHES...WITH THE HEAVIEST AMOUNTS FROM BOULDER ACROSS THE WESTERN AND SOUTHERN SUBURBS OF DENVER AND OVER THE PALMER DIVIDE. NORTH TO NORTHEAST WINDS OF 10 TO 20 MPH WILL OCCUR WITH GUSTS TO 30 MPH ALONG AND EAST OF INTERSTATE 25. * IMPACTS...ROADS WILL BE ICY OR SNOWPACKED. SOME SECONDARY ROADS MAY BECOME IMPASSABLE IN AREAS THAT RECEIVE THE HEAVIEST SNOWFALL. THE MORNING COMMUTE WILL BE EXTREMELY SLOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... DRIVERS SHOULD ALLOW CONSIDERABLE EXTRA TIME THIS MORNING. CONSIDER DELAYING TRAVEL UNTIL CONDITIONS IMPROVE LATER TODAY. WHEN DRIVING...SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ031-033-034-037-221800- /O.CON.KBOU.WW.Y.0050.000000T0000Z-111222T1800Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-CENTRAL AND SOUTHEAST PARK COUNTY- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK...FAIRPLAY...HARTSEL... LAKE GEORGE...SOUTH PARK 312 AM MST THU DEC 22 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING. * TIMING...SNOW WILL DIMINISH FROM NORTH TO SOUTH TODAY. * ACCUMULATION/WIND...ADDITIONAL SNOWFALL TODAY WILL RANGE FROM 1 TO 4 INCHES...WITH THE HEAVIEST AMOUNTS FROM BOULDER COUNTY SOUTH TO PARK COUNTY. THIS WILL GIVE STORM TOTALS OF 6 TO 12 INCHES IN THOSE AREAS...WITH 3 TO 8 INCHES FOR AREAS WEST OF THE FRONT RANGE. * IMPACTS...ROADS WILL BE ICY AND SNOWPACKED. TRAVEL MAY BE DIFFICULT IN THE AREAS RECEIVING THE HEAVIEST SNOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING IN THE MOUNTAINS SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION SAFELY. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ038-042>046-049-221800- /O.CON.KBOU.WW.Y.0050.000000T0000Z-111222T1800Z/ LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- 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-WASHINGTON COUNTY- INCLUDING THE CITIES OF...FORT COLLINS...HEREFORD...LOVELAND... NUNN...BRIGGSDALE...GROVER...PAWNEE BUTTES...RAYMER...STONEHAM... EATON...FORT LUPTON...GREELEY...ROGGEN...BRUSH...FORT MORGAN... GOODRICH...WIGGINS...BENNETT...BYERS...DEER TRAIL...LEADER... AGATE...HUGO...LIMON...MATHESON...AKRON...COPE...LAST CHANCE... OTIS 312 AM MST THU DEC 22 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING. * TIMING...SNOW WILL GRADUALLY DIMINISH THIS MORNING. * ACCUMULATION/WIND...ADDITIONAL SNOWFALL OF 1 TO 3 INCHES IS EXPECTED TODAY WITH THE HEAVIEST AMOUNTS ALONG AND SOUTH OF INTERSTATE 70. THIS WILL GIVE STORM TOTALS OF 3 TO 6 INCHES WITH UP TO 8 INCHES IN SOUTHEASTERN LARIMER AND SOUTHWESTERN WELD COUNTIES. NORTH TO NORTHEAST WINDS OF 10 TO 20 MPH WILL OCCUR WITH GUSTS TO 30 MPH. * IMPACTS...ROADS WILL BE ICY OR SNOWPACKED AND TRAVEL WILL BE SLOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING OVER THE PLAINS OF NORTHEAST COLORADO SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ COZ030-032-221800- /O.CON.KBOU.WW.Y.0050.000000T0000Z-111222T1800Z/ JACKSON COUNTY BELOW 9000 FEET- GRAND AND SUMMIT COUNTIES BELOW 9000 FEET- INCLUDING THE CITIES OF...GOULD...NORTH PARK...RAND...SPICER... WALDEN...DILLON...FRASER...GRANBY...GRAND LAKE... HOT SULPHUR SPRINGS...KREMMLING 312 AM MST THU DEC 22 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING. * TIMING...SNOW WILL GRADUALLY DIMINISH THIS MORNING. * ACCUMULATION/WIND...ADDITIONAL SNOWFALL OF 1 TO 3 INCHES IS EXPECTED THIS MORNING...GIVING STORM TOTALS OF 3 TO 7 INCHES. * IMPACTS...ROADS WILL BE ICY OR SNOWPACKED AND TRAVEL WILL BE SLOW. PRECAUTIONARY/PREPAREDNESS ACTIONS... PERSONS DRIVING IN THE MOUNTAINS SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION. ROADS WILL BE SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. && $$ GIMMESTAD
631 WWUS45 KBOU 221804 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 1104 AM MST THU DEC 22 2011 COZ035-036-039>041-221915- /O.EXP.KBOU.WS.W.0017.000000T0000Z-111222T1800Z/ 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- 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- INCLUDING THE CITIES OF...ESTES PARK...GLENDEVEY...NEDERLAND... RED FEATHER LAKES...BAILEY...CENTRAL CITY...EVERGREEN... GEORGETOWN...IDAHO SPRINGS...WESTCREEK...ARVADA...BOULDER... GOLDEN...LAKEWOOD...LONGMONT...AURORA...BRIGHTON... CITY OF DENVER...DENVER INTERNATIONAL AIRPORT...HIGHLANDS RANCH... LITTLETON...PARKER...CASTLE ROCK...ELBERT...KIOWA...LARKSPUR... SIMLA 1104 AM MST THU DEC 22 2011 ...WINTER STORM WARNING HAS EXPIRED... THE WINTER STORM WARNING IS NO LONGER IN EFFECT. THE SNOW WILL CONTINUE TO DECREASE ACROSS THE AREA THROUGH THE AFTERNOON...WITH ADDITIONAL ACCUMULATIONS LESS THAN 2 INCHES. ROADS WILL REMAIN SNOW PACKED. $$ COZ030>034-037-038-042>046-049-221915- /O.EXP.KBOU.WW.Y.0050.000000T0000Z-111222T1800Z/ JACKSON COUNTY BELOW 9000 FEET- WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- GRAND AND SUMMIT COUNTIES BELOW 9000 FEET- SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-CENTRAL AND SOUTHEAST PARK COUNTY- LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- NORTHEAST WELD COUNTY-CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- NORTH AND NORTHEAST ELBERT COUNTY BELOW 6000 FEET/NORTH LINCOLN COUNTY-WASHINGTON COUNTY- INCLUDING THE CITIES OF...GOULD...NORTH PARK...RAND...SPICER... WALDEN...EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS...DILLON...FRASER...GRANBY...GRAND LAKE... HOT SULPHUR SPRINGS...KREMMLING...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK...FAIRPLAY...HARTSEL... LAKE GEORGE...SOUTH PARK...FORT COLLINS...HEREFORD...LOVELAND... NUNN...BRIGGSDALE...GROVER...PAWNEE BUTTES...RAYMER...STONEHAM... EATON...FORT LUPTON...GREELEY...ROGGEN...BRUSH...FORT MORGAN... GOODRICH...WIGGINS...BENNETT...BYERS...DEER TRAIL...LEADER... AGATE...HUGO...LIMON...MATHESON...AKRON...COPE...LAST CHANCE... OTIS 1104 AM MST THU DEC 22 2011 ...WINTER WEATHER ADVISORY HAS EXPIRED... THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. HE SNOW WILL CONTINUE TO DECREASE ACROSS THE AREA THROUGH THE AFTERNOON...WITH ADDITIONAL ACCUMULATIONS LESS THAN 2 INCHES. ROADS WILL REMAIN SNOW PACKED. $$
What forecasters said that day
The local office's own words before this winter storm warning went out, 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 this winter storm warning went out at Dec 21, 4:27 AM MST, 6 minutes earlier.
Area forecast discussion, Dec 21, 4:27 AM MST, 6 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 427 AM MST WED DEC 21 2011 .SHORT TERM...FORECAST IN PRETTY GOOD SHAPE AND MODELS IN GOOD AGREEMENT WITH THE UPCOMING STORM. VERY WEAK QG ASCENT IS ALREADY UNDERWAY OVER THE CWA PER LATEST RUC ANALYSES AND IT WILL BE ON THE INCREASE THROUGHOUT THE SHORT TERM. THE HEART OF IT IS OVER CENTRAL COLORADO BY 12Z THURSDAY WITH AT LEAST MODEST VALUES THROUGHOUT THE ENTIRE CWA BY THEN. AT THE SURFACE UPSLOPE WILL ALSO BE INCREASING THROUGH THE PERIOD WITH SOME MINOR AND PROBABLY NOT TERRIBLY SIGNIFICANT TIMING DIFFERENCES AMONGST THE MODELS. CONTRARY TO SOME OF THE EARLIER STORMS THIS YEAR A DECENT QG ANALLOBARIC CENTER IS FORECAST TO DEVELOP OVER THE AREA BY 12Z WHICH MAY ENHANCE THE UPSLOPE INTO THE FRONT RANGE AND AID IN SNOWFALL IN AND NEAR THE FOOTHILLS. ALL IN ALL THIS LOOKS TO BE A FAIRLY TYPICAL EARLY WINTER STORM FOR NORTHEAST AND NORTH CENTRAL COLORADO. .LONG TERM...AN UPPER LEVEL LOW WILL BE OVER SWRN CO THU MORNING AND WILL MOVE SLOWLY SSE INTO NWRN NEW MEXICO BY THU NIGHT. CROSS-SECTIONS SHOW FAVORABLE UPSLOPE FLOW AND DECENT QG ASCENT THRU 18Z WITH A GRADUAL WEAKENING IN BOTH UPSLOPE FLOW AND QG ASCENT DURING THE AFTN HOURS. THUS SHOULD SEE PERIODS OF MDT TO HEAVY SNOW IN THE FOOTHILLS AND ERN FACING SLOPES OF THE MTNS. AT LOWER ELEVATIONS APPEARS BEST CHC OF HEAVY SNOWS WILL BE FM BOULDER TO DENVER SOUTHWARD ACROSS THE PALMER DIVIDE SO WILL CONTINUE WITH A WARNING IN THESE AREAS THRU 18Z. FURTHER NORTH CLOSER TO TO THE CO-WY BORDER APPEARS SNOW AMOUNTS WILL NOT BE QUITE AS HEAVY SO WILL HAVE AN ADVISORY IN THOSE AREAS THRU 18Z. OVER THE PLAINS WILL HAVE ADVISORIES FM EAST OF DENVER TO LIMON THRU MIDDAY. WINDS WILL BE GUSTY IN THE MORNING AS WELL ESPECIALLY ALONG AND EAST OF I-25 SO WILL SEE SOME BLOWING SNOW AND POOR VISIBILITIES AS WELL. BY AFTN SHOULD SEE SNOWFALL GRADUALLY DECREASE FM NORTH TO SOUTH ALTHOUGH ACROSS THE SRN FOOTHILLS AND PALMER DIVIDE ITS POSSIBLE MDT SNOWFALL MAY LINGER THRU THE LATE AFTN HOURS. AS FOR TOTAL AMOUNTS WILL HAVE 6 TO 12 INCHES IN THE MTNS...8 TO 16 INCHES IN THE FOOTHILLS...5 TO 10 INCHES FM DENVER SOUTH TO THE PALMER DIVIDE WITH 3 TO 6 INCHES NEAR THE CO-WY BORDER. OVER THE PLAINS AMOUNTS WILL RANGE FROM 2 TO 4 INCHES OVER THE FAR NERN CORNER WITH 3 TO 6 INCHES ELSEWHERE. HIGHS ON THU WILL STRUGGLE TO GET ABVE 20 DEGREES OVER MUCH OF NERN CO AS COLD SFC HIGH PRESSURE BUILDS SOUTHWARD INTO THE AREA. FOR THU NIGHT INTO FRI THE STORM SYSTEM WILL CONTINUE TO MOVE SE AWAY FM THE AREA WITH SNOW ENDING IN ALL AREAS BY EARLY THU EVENING. CLEARING SKIES THU NIGHT COMBINED WITH FRESH SNOW COVER MAY ALLOW FOR LOWS TO DROP BLO ZERO ACROSS MUCH OF NERN CO BY FRI MORNING. ON FRI DRY NNE MID LEVEL FLOW WILL BE OVER THE AREA WITH MO PCPN EXPECTED. HIGHS ON FRI WILL LIKELY BE AFFECTED BY SNOW COVER OVER NERN CO AS INVERSIONS WILL HAVE A HARD TIME BREAKING SO WILL KEEP HIGHS IN THE 25 TO 30 DEGREE RANGE. FOR SAT LOOKS LIKE A WEAK WEATHER DISTURBANCE MAY TRACK ACROSS NRN CO HOWEVER CROSS-SECTIONS SHOW VERY LITTLE MOISTURE WITH THIS FEATURE SO WILL ONLY MENTION A SLIGHT CHC OF SNOW IN THE MTNS NORTH OF -70. AS FOR HIGHS LATEST GFS IS REALLY STARTING TO WRM TEMPS HOWEVER BELIEVE LINGERNG SNOW PACK COMBINED WITH LACK OF DOWNSLOPE COMPONENT WILL PROBABLY KEEP HIGHS IN THE 30S ACROSS NERN CO INSTEAD OF THE 40S AS SHOWN BY THE GFS. BY CHRISTMAS AN UPPER LEVEL RIDGE WILL BE OVER THE AREA WITH CROSS-SECTIONS SHOWING A DRY AIRMASS IN PLACE SO WILL KEEP FCST DRY. ONCE AGAIN LATEST GFS IS SHOWING QUITE A BIT OF WARMING ON SUN WITH HIGHS IN THE 50S ACROSS NERN CO AS LOW LEVEL WINDS ARE FCST TO BECOME WEAK SWLY. FOR NOW WILL KEEP READINGS IN THE UPPER 30S TO MID 40S DUE TO LINGERING SNOW COVER. FOR MON THE FLOW ALOFT WILL INCREASE AND BECOME MORE WLY WHICH SHOULD ALLOW FOR BETTER DOWNSLOPE WARMING AND ALLOW HIGHS TO RISE WELLS INTO 40S. WITH THE INCREASING FLOW ALOFT WINDS WILL BECOME GUSTY IN THE MTNS AND FOOTHILLS. BY TUE THE ECMWF AND GFS DIVERGE SOMEWHAT AS THE GFS HAS MAINLY DRY WNW FLOW ALOFT WHILE THE ECMWF SHOWS AN UPPER LEVEL ROUGH MOVING QUICKLY ACROSS THE AREA WITH A CHC OF SNOW IN THE MTNS. && .AVIATION...VFR CONDITIONS ARE EXPECTED THROUGH AT LEAST EARLY AFTERNOON WITH A THREAT OF SCT-BKN060 BY MID AFTERNOON. CEILINGS AND VISIBILITIES SHOULD TANK FAIRLY RAPIDLY DURING THE 00Z TO 03Z TIME FRAME WITH SNOW AND REMAIN DOWN THROUGH THE NIGHT. WINDS WILL TRANSITION TO LIGHT NORTH/NORTHEAST DURING THE DAY WITH A GRADUAL INCREASE INTO THE EVENING HOURS. SUSTAINED SPEEDS IN THE 10 TO 15 KNOT RANGE SHOULD BE COMMON AFTER ABOUT 00Z...CONTINUING THROUGH 12Z WITH GUSTS TO THE LOWER 20S...STRONGEST AT KDEN. THE WIND WILL CAUSE SOME BLOWING SNOW AS WELL. && .BOU WATCHES/WARNINGS/ADVISORIES... WINTER WEATHER ADVISORY FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY FOR COZ031-033-034-037-038-042>046. WINTER STORM WARNING FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY FOR COZ035-036-039>041. && SHORT TERM...ET LONG TERM....RPK AVIATION...ET
Hazardous weather outlook, Dec 20, 11:01 AM MST, 17 hours 32 minutes before
HAZARDOUS WEATHER OUTLOOK...CORRECTED NATIONAL WEATHER SERVICE DENVER CO 1101 AM MST TUE DEC 20 2011 COZ030>051-211300- 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- 1101 AM MST TUE DEC 20 2011 ...ANOTHER ROUND OF SNOW AND COLD ON THE WAY FOR WEDNESDAY NIGHT AND THURSDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY AFTER A DRY AND RELATIVELY MILD DAY WEDNESDAY...CONDITIONS ARE EXPECTED TO QUICKLY TURN COLDER WITH SNOWFALL DEVELOPING IN THE NORTHERN MOUNTAINS LATE WEDNESDAY AFTERNOON AND ACROSS THE PLAINS AND REMAIN MOUNTAIN AREAS WEDNESDAY EVENING FOLLOWING THE PASSAGE OF STRONG COLD FRONT. BRISK UPSLOPE FLOW EAST OF THE MOUNTAINS THROUGH THE NIGHT INTO THURSDAY MORNING COULD PRODUCE PERIODS OF MODERATE SNOWFALL IN THE FRONT RANGE FOOTHILLS AND ALONG THE INTERSTATE 25 URBAN CORRIDOR...WITH LIGHTER SNOWFALL AMOUNTS IN THE MOUNTAINS AND FARTHER OUT ACROSS THE NORTHEAST PLAINS. IT NOW APPEARS THE HEAVIEST SNOWFALL WILL OCCUR WEDNESDAY NIGHT WHEN UPSLOPE FLOW WILL BE AT ITS STRONGEST. SNOW ACCUMULATIONS BY LATE THURSDAY MORNING COULD RANGE FROM 3 TO 7 INCHES ALONG THE INTERSTATE 25 URBAN CORRIDOR...THE HIGHER AMOUNTS POSSIBLE SOUTH AND WEST OF DENVER...TO UPWARDS OF A FOOT IN THE FOOTHILLS SOUTH OF INTERSTATE 70 AND PORTIONS OF THE PALMER DIVIDE. THE PLAINS WILL LIKELY SEE LIGHTER ACCUMULATION... GENERALLY LESS THAN 3 INCHES. IN ADDITION...NORTH TO NORTHEAST WINDS OF 10 TO 20 MPH AND HIGHER GUSTS EAST OF INTERSTATE 25 COULD ALSO PRODUCE AREAS OF BLOWING SNOW RESULTING IN POOR VISIBILITIES AND DIFFICULT DRIVING CONDITIONS. WEATHER CONDITIONS SHOULD BEGIN TO IMPROVE LATE ON THURSDAY BUT REMAIN QUITE COLD. BY FRIDAY DRY CONDITIONS WILL PREVAIL ACROSS THE OUTLOOK AREA WITH HIGH PRESSURE BUILDING IN FROM THE WEST...ALTHOUGH TEMPERATURES WILL REMAIN ON THE COLD SIDE. IT SHOULD REMAIN DRY ON CHRISTMAS EVE AND CHRISTMAS DAY WITH TEMPERATURES SLOWLY WARMING THROUGH THE PERIOD. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. MEIER/BAKER
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 21, 4:33 AM MST | Winter Weather Advisory | BOU | Adams, Arapahoe, Boulder, Clear Creek, Elbert, Gilpin and 10 more | 30 hr |
Nearby
Winter Storm Warnings in Colorado, 2011Every winter storm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.