Alert archive / Colorado / Winter Storm Watches in 2012
Winter Storm Watch 5, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this winter storm watch at Dec 17, 2012, 3:36 PM MST for 16 counties in Colorado. It took effect at Dec 19, 2012, 5:00 AM MST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Dec 17, 2012, 3:36 PM MST (22:36 UTC)
- In effect from
- Dec 19, 2012, 5:00 AM MST
- Expired
- Dec 18, 2012, 1:56 PM MST
- In force
- Issued by
- NWS Denver/Boulder, CO
Counties Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Jefferson County, CO, Larimer County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 42 km from the middle of the area, began a volume at 22:36 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.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 10.6 hours before the alert went out and 80 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
- 2625 m above ground
- 0-6 km bulk shear
- 71 kt
- 0-1 km storm-relative helicity
- 127 m²/s²
- 0-3 km storm-relative helicity
- 371 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
953 WWUS45 KBOU 172236 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 336 PM MST MON DEC 17 2012 ...SNOW AND BLOWING SNOW TO CONTINUE FOR THE NORTHERN MOUNTAINS OF COLORADO... .A STRONG UPPER LEVEL JET STREAM RACING OFF THE PACIFIC WILL CONTINUE TO BRING STRONG WINDS AND SEVERAL WAVES OF PACIFIC MOISTURE INTO NORTHERN COLORADO. SNOW WILL CONTINUE OVER THE MOUNTAINS THROUGH TONIGHT...WITH THE HEAVIEST SNOW IN THE PARK... GORE... AND SIERRA MADRE RANGES...INCLUDING RABBIT EARS PASS AND THE MOUNT ZIRKEL WILDERNESS AREAS. STRONG WINDS WILL PRODUCE CONSIDERABLE BLOWING AND DRIFTING SNOW AND POOR VISIBILITIES. WINTER DRIVING CONDITIONS WILL OCCUR ACROSS ALL OF THE HIGH MOUNTAIN PASSES ALONG AND NORTH OF THE I-70 CORRIDOR. SNOW IS EXPECTED TO DEVELOP ACROSS THE URBAN CORRIDOR AND NORTHEAST PLAINS LATE TUESDAY NIGHT INTO WEDNESDAY. THE COMBINATION OF SNOW AND BLOWING SNOW WILL PRODUCE THE POTENTIAL FOR WINTER DRIVING CONDITIONS ALONG INTERSTATES 70 AND 76 AS WELL. COZ031-180645- /O.CON.KBOU.WS.W.0009.000000T0000Z-121218T1200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS 336 PM MST MON DEC 17 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST TUESDAY... * TIMING...SNOW AND STRONG WIND WILL CONTINUE THROUGH TONIGHT. THE SNOW WILL BE HEAVY AT TIMES. THE STRONG WINDS WILL CREATE CONSIDERABLE BLOWING AND DRIFTING SNOW. * SNOW ACCUMULATIONS...10 TO 16 INCHES BY EARLY TUESDAY MORNING. ADDITIONAL ACCUMULATING SNOWFALL IS EXPECTED TUESDAY INTO WEDNESDAY. * WIND...WEST WINDS 20 TO 30 MPH WITH GUSTS UP TO 45 MPH OVER EXPOSED RIDGES. * MAIN IMPACT...STRONG WINDS AND PERIODS OF HEAVY SNOW WILL PRODUCE HARSH WINTER CONDITIONS AND DANGEROUS TRAVEL. MANY SECONDARY ROADS WILL BECOME IMPASSABLE DUE TO HEAVY SNOW ACCUMULATION AND SIGNIFICANT DRIFTING SNOW. VISIBILITIES MAY BE REDUCED TO ZERO AT TIMES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ COZ034-180645- /O.EXB.KBOU.WW.Y.0021.121218T0000Z-121218T1200Z/ SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF...BERTHOUD PASS...BRECKENRIDGE... EAST SLOPES MOSQUITO RANGE...EAST SLOPES SOUTHERN GORE RANGE... EISENHOWER TUNNEL...INDIAN PEAKS...KENOSHA MOUNTAINS... MOUNT EVANS...WILLIAMS FORK MOUNTAINS...WINTER PARK 336 PM MST MON DEC 17 2012 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 AM MST TUESDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW WHICH IS IN EFFECT UNTIL 5 AM MST TUESDAY. * TIMING...SNOW WILL CONTINUE THROUGH TONIGHT AND WILL BE HEAVY AT TIMES. * SNOW ACCUMULATIONS...4 TO 8 INCHES BY EARLY TUESDAY MORNING. ADDITIONAL ACCUMULATING SNOWFALL IS EXPECTED TUESDAY INTO WEDNESDAY. * WIND...WEST WINDS 20 TO 30 MPH WITH GUSTS IN EXCESS OF 50 MPH ABOVE TIMBERLINE. * MAIN IMPACT...SNOW AND CONSIDERABLE BLOWING SNOW WILL CREATE HAZARDOUS DRIVING CONDITIONS. WHITEOUT CONDITIONS CAN BE EXPECTED AT TIMES OVER THE HIGHER MOUNTAINS AND PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ COZ033-180645- /O.CON.KBOU.WW.Y.0021.000000T0000Z-121218T1200Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS 336 PM MST MON DEC 17 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST TUESDAY... * TIMING...SNOW WILL CONTINUE THROUGH TONIGHT AND WILL BE HEAVY AT TIMES. * SNOW ACCUMULATIONS...5 TO 10 INCHES BY EARLY TUESDAY MORNING. ADDITIONAL ACCUMULATING SNOWFALL IS EXPECTED TUESDAY INTO WEDNESDAY. * WIND...WEST WINDS 25 TO 35 MPH WITH GUSTS IN EXCESS OF 60 MPH ABOVE TIMBERLINE. * MAIN IMPACT...SNOW AND CONSIDERABLE BLOWING SNOW WILL CREATE HAZARDOUS DRIVING CONDITIONS. WHITEOUT CONDITIONS CAN BE EXPECTED AT TIMES OVER THE HIGHER MOUNTAINS AND PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ COZ038>051-180645- /O.NEW.KBOU.WS.A.0005.121219T1200Z-121220T0000Z/ 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- INCLUDING THE CITIES OF...FORT COLLINS...HEREFORD...LOVELAND... NUNN...ARVADA...BOULDER...GOLDEN...LAKEWOOD...LONGMONT...AURORA... BRIGHTON...CITY OF DENVER...DENVER INTERNATIONAL AIRPORT... HIGHLANDS RANCH...LITTLETON...PARKER...CASTLE ROCK...ELBERT... FONDIS...KIOWA...LARKSPUR...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...FORDER... KARVAL...KUTCH...PUNKIN CENTER...CROOK...MERINO...STERLING... PEETZ...AKRON...COPE...LAST CHANCE...OTIS...JULESBURG...OVID... SEDGWICK...AMHERST...HAXTUN...HOLYOKE 336 PM MST MON DEC 17 2012 ...WINTER STORM WATCH IN EFFECT FROM LATE TUESDAY NIGHT THROUGH WEDNESDAY AFTERNOON... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM WATCH...WHICH IS IN EFFECT FROM LATE TUESDAY NIGHT THROUGH WEDNESDAY AFTERNOON. * TIMING...SNOW WILL DEVELOP LATE TUESDAY NIGHT AND CONTINUE THROUGH WEDNESDAY AFTERNOON. * MAIN IMPACT...TOTAL SNOW ACCUMULATIONS OF 4 TO 8 INCHES POSSIBLE. NORTH TO NORTHEAST WINDS 20 TO 30 MPH WITH GUSTS TO 40 MPH WILL PRODUCE EXTENSIVE BLOWING AND DRIFTING SNOW. * OTHER IMPACTS...ROAD CLOSURES POSSIBLE DUE TO BLOWING AND DRIFTING SNOW...INCLUDING INTERSTATES 70 AND 76. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS. && $$
3 follow-up statements
110 WWUS45 KBOU 180544 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER/BOULDER CO 1044 PM MST MON DEC 17 2012 ...SNOW AND BLOWING SNOW CONTINUES TONIGHT FOR THE NORTHERN MOUNTAINS OF COLORADO... ...WINTER STORM WATCH FOR THE NORTHEAST COLORADO PLAINS FOR LATE TUESDAY NIGHT AND WEDNESDAY... .A PERIOD OF HEAVY SNOW WILL OCCUR OVERNIGHT IN THE NORTH CENTRAL COLORADO MOUNTAINS. THE HEAVIEST SNOW WILL SHIFT FROM RABBIT EARS AND CAMERON PASSES ACROSS THE INTERSTATE 70 CORRIDOR DURING THE EARLY MORNING HOURS...WITH SNOW BECOMING LIGHTER TUESDAY MORNING. GUSTY WINDS WILL PRODUCE BLOWING AND DRIFTING SNOW AND POOR VISIBILITIES ABOVE 10 THOUSAND FEET. SNOW WILL INCREASE AGAIN IN THE MOUNTAINS TUESDAY NIGHT AND WEDNESDAY. SNOW IS EXPECTED TO DEVELOP ACROSS THE URBAN CORRIDOR AND NORTHEAST PLAINS LATE TUESDAY NIGHT INTO WEDNESDAY. THE COMBINATION OF SNOW AND BLOWING SNOW WILL PRODUCE THE POTENTIAL FOR WINTER DRIVING CONDITIONS ALONG INTERSTATES 70 AND 76 AS WELL. COZ031-181200- /O.CON.KBOU.WS.W.0009.000000T0000Z-121218T1200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS 1044 PM MST MON DEC 17 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 AM MST TUESDAY... * TIMING...SNOW AND STRONG WIND WILL CONTINUE THROUGH TONIGHT. THE SNOW WILL BE HEAVY AT TIMES. THE STRONG WINDS WILL CREATE CONSIDERABLE BLOWING AND DRIFTING SNOW. * SNOW ACCUMULATIONS...STORM TOTALS OF 10 TO 16 INCHES BY EARLY TUESDAY MORNING. LIGHTER SNOW IS EXPECTED ON TUESDAY...BUT SNOW WILL INCREASE AGAIN TUESDAY NIGHT INTO WEDNESDAY. * WIND...WEST WINDS 20 TO 30 MPH WITH GUSTS UP TO 40 MPH OVER EXPOSED RIDGES. * MAIN IMPACT...STRONG WINDS AND PERIODS OF HEAVY SNOW WILL PRODUCE HARSH WINTER CONDITIONS AND DANGEROUS TRAVEL WITH LOW VISIBILITIES IN EXPOSED AREAS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ COZ033-181200- /O.CON.KBOU.WW.Y.0021.000000T0000Z-121218T1200Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS 1044 PM MST MON DEC 17 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST TUESDAY... * TIMING...SNOW WILL CONTINUE THROUGH TONIGHT AND WILL BE HEAVY AT TIMES. * SNOW ACCUMULATIONS...5 TO 10 INCHES BY EARLY TUESDAY MORNING. LIGHTER SNOW IS EXPECTED ON TUESDAY...BUT THE SNOW WILL INCREASE AGAIN TUESDAY NIGHT INTO WEDNESDAY. * WIND...WEST WINDS 20 TO 30 MPH WITH GUSTS TO 50 MPH ABOVE TIMBERLINE. * MAIN IMPACT...SNOW AND CONSIDERABLE BLOWING SNOW WILL CREATE HAZARDOUS DRIVING CONDITIONS. WHITEOUT CONDITIONS CAN BE EXPECTED AT TIMES OVER THE HIGHER MOUNTAINS AND PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ COZ034-181200- /O.CON.KBOU.WW.Y.0021.000000T0000Z-121218T1200Z/ SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF...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 1044 PM MST MON DEC 17 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST TUESDAY... * TIMING...SNOW WILL CONTINUE THROUGH TONIGHT AND WILL BE HEAVY AT TIMES. * SNOW ACCUMULATIONS...4 TO 8 INCHES BY EARLY TUESDAY MORNING. LIGHTER SNOW IS EXPECTED ON TUESDAY...BUT SNOW WILL INCREASE AGAIN TUESDAY NIGHT INTO WEDNESDAY. * WIND...WEST WINDS 20 TO 30 MPH WITH GUSTS TO 50 MPH ABOVE TIMBERLINE. * MAIN IMPACT...SNOW AND CONSIDERABLE BLOWING SNOW WILL CREATE HAZARDOUS DRIVING CONDITIONS. WHITEOUT CONDITIONS CAN BE EXPECTED AT TIMES OVER THE HIGHER MOUNTAINS AND PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ COZ038>051-181300- /O.CON.KBOU.WS.A.0005.121219T1200Z-121220T0000Z/ 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- INCLUDING THE CITIES OF...FORT COLLINS...HEREFORD...LOVELAND... NUNN...ARVADA...BOULDER...GOLDEN...LAKEWOOD...LONGMONT...AURORA... BRIGHTON...CITY OF DENVER...DENVER INTERNATIONAL AIRPORT... HIGHLANDS RANCH...LITTLETON...PARKER...CASTLE ROCK...ELBERT... FONDIS...KIOWA...LARKSPUR...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...FORDER... KARVAL...KUTCH...PUNKIN CENTER...CROOK...MERINO...STERLING... PEETZ...AKRON...COPE...LAST CHANCE...OTIS...JULESBURG...OVID... SEDGWICK...AMHERST...HAXTUN...HOLYOKE 1044 PM MST MON DEC 17 2012 ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE TUESDAY NIGHT THROUGH WEDNESDAY AFTERNOON... * TIMING...SNOW WILL DEVELOP LATE TUESDAY NIGHT AND CONTINUE THROUGH WEDNESDAY AFTERNOON. * MAIN IMPACT...TOTAL SNOW ACCUMULATIONS OF 4 TO 8 INCHES POSSIBLE. NORTH TO NORTHEAST WINDS 20 TO 30 MPH WITH GUSTS TO 40 MPH WILL PRODUCE EXTENSIVE BLOWING AND DRIFTING SNOW. * OTHER IMPACTS...ROAD CLOSURES POSSIBLE DUE TO BLOWING AND DRIFTING SNOW...INCLUDING INTERSTATES 70 AND 76. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS. && $$ GIMMESTAD
690 WWUS45 KBOU 181216 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER/BOULDER CO 516 AM MST TUE DEC 18 2012 ...WINTER STORM WATCH FOR THE NORTHEAST COLORADO PLAINS FOR LATE TONIGHT AND WEDNESDAY... .SNOW IS EXPECTED TO DEVELOP ACROSS THE URBAN CORRIDOR AND NORTHEAST PLAINS LATE TONIGHT INTO WEDNESDAY. THE COMBINATION OF SNOW AND BLOWING SNOW WILL PRODUCE THE POTENTIAL FOR WINTER DRIVING CONDITIONS INCLUDING ON INTERSTATES 70 AND 76. COZ031-181330- /O.EXP.KBOU.WS.W.0009.000000T0000Z-121218T1200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS 516 AM MST TUE DEC 18 2012 ...WINTER STORM WARNING HAS EXPIRED... SNOWFALL WILL BEGIN TO DIMINISH TODAY FROM YESTERDAYS STORM. HOWEVER ANOTHER 2 TO 4 INCHES OF SNOW COULD FALL THROUGHOUT THE COURSE OF THE DAY TODAY. $$ COZ033-034-181330- /O.EXP.KBOU.WW.Y.0021.000000T0000Z-121218T1200Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK 516 AM MST TUE DEC 18 2012 ...WINTER WEATHER ADVISORY HAS EXPIRED... SNOWFALL WILL BEGIN TO DIMINISH TODAY FROM YESTERDAYS STORM. HOWEVER ANOTHER 1 TO 4 INCHES OF SNOW COULD FALL THROUGHOUT THE COURSE OF THE DAY TODAY. $$ COZ038>051-182315- /O.CON.KBOU.WS.A.0005.121219T1200Z-121220T0000Z/ 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- INCLUDING THE CITIES OF...FORT COLLINS...HEREFORD...LOVELAND... NUNN...ARVADA...BOULDER...GOLDEN...LAKEWOOD...LONGMONT...AURORA... BRIGHTON...CITY OF DENVER...DENVER INTERNATIONAL AIRPORT... HIGHLANDS RANCH...LITTLETON...PARKER...CASTLE ROCK...ELBERT... FONDIS...KIOWA...LARKSPUR...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...FORDER... KARVAL...KUTCH...PUNKIN CENTER...CROOK...MERINO...STERLING... PEETZ...AKRON...COPE...LAST CHANCE...OTIS...JULESBURG...OVID... SEDGWICK...AMHERST...HAXTUN...HOLYOKE 516 AM MST TUE DEC 18 2012 ...WINTER STORM WATCH REMAINS IN EFFECT FROM LATE TONIGHT THROUGH WEDNESDAY AFTERNOON... * TIMING...SNOW WILL DEVELOP LATE TONIGHT AND CONTINUE THROUGH WEDNESDAY AFTERNOON. THE HEAVIEST SNOWFALL RATES WILL OCCUR IN THE MORNING. * MAIN IMPACT...TOTAL SNOW ACCUMULATIONS OF 3 TO 8 INCHES POSSIBLE. NORTH TO NORTHEAST WINDS 20 TO 30 MPH WITH GUSTS TO 45 MPH WILL PRODUCE EXTENSIVE BLOWING AND DRIFTING SNOW. * OTHER IMPACTS...ROAD CLOSURES POSSIBLE DUE TO BLOWING AND DRIFTING SNOW...INCLUDING INTERSTATES 70 AND 76. TRAVEL MAY BE DIFFICULT AREA-WIDE DURING THE MORNING HOURS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS. && $$
577 WWUS45 KBOU 182056 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 156 PM MST TUE DEC 18 2012 ...WINTER STORM WILL SPREAD ACROSS COLORADO TONIGHT AND WEDNESDAY... .SNOW IS EXPECTED TO CONTINUE IN THE MOUNTAINS THROUGH WEDNESDAY MORNING...WITH HEAVY SNOW POSSIBLE LATE TONIGHT AND WEDNESDAY MORNING. SNOW WILL SPREAD ACROSS THE PLAINS LATE TONIGHT ANDDEVELOP ACROSS THE URBAN CORRIDOR AND NORTHEAST PLAINS LATE TONIGHT...COMBINING WITH WIND ON WEDNESDAY. THE COMBINATION OF SNOW AND BLOWING SNOW WILL PRODUCE THE POTENTIAL FOR WINTER DRIVING CONDITIONS INCLUDING ON INTERSTATES 70 AND 76. COZ041-046>051-190500- /O.UPG.KBOU.WS.A.0005.121219T1200Z-121220T0000Z/ /O.NEW.KBOU.BZ.W.0003.121219T1500Z-121220T0300Z/ ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- 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- INCLUDING THE CITIES OF...CASTLE ROCK...ELBERT...FONDIS...KIOWA... LARKSPUR...AGATE...HUGO...LIMON...MATHESON...FORDER...KARVAL... KUTCH...PUNKIN CENTER...CROOK...MERINO...STERLING...PEETZ... AKRON...COPE...LAST CHANCE...OTIS...JULESBURG...OVID...SEDGWICK... AMHERST...HAXTUN...HOLYOKE 156 PM MST TUE DEC 18 2012 ...BLIZZARD WARNING IN EFFECT FROM 8 AM TO 8 PM MST WEDNESDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A BLIZZARD WARNING...WHICH IS IN EFFECT FROM 8 AM TO 8 PM MST WEDNESDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * TIMING...SNOW WILL DEVELOP LATE TONIGHT AND CONTINUE THROUGH WEDNESDAY AFTERNOON. THE HEAVIEST SNOWFALL RATES WILL OCCUR IN THE MORNING. * WINDS/VISIBILITY...NORTH WINDS OF 25 TO 40 MPH WITH SOME HIGHER GUSTS WILL CREATE EXTENSIVE BLOWING AND DRIFTING CONDITIONS AND WIDESPREAD AREAS OF VISIBILITIES BELOW A QUARTER MILE. * SNOW ACCUMULATIONS...SNOW AMOUNTS OF 3 TO 6 INCHES WILL FALL BY SUNSET WEDNESDAY. * IMPACTS...ROAD CLOSURES POSSIBLE DUE TO BLOWING AND DRIFTING SNOW...INCLUDING INTERSTATES 70 AND 76. TRAVEL MAY BE DIFFICULT AREA-WIDE DURING THE MORNING HOURS. WIND CHILL VALUES WILL HOVER NEAR ZERO WEDNESDAY AFTERNOON. PRECAUTIONARY/PREPAREDNESS ACTIONS... A BLIZZARD WARNING MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. FALLING AND BLOWING SNOW WITH STRONG WINDS AND POOR VISIBILITIES ARE LIKELY. THIS WILL LEAD TO WHITEOUT CONDITIONS...MAKING TRAVEL EXTREMELY DANGEROUS. DO NOT TRAVEL. IF YOU MUST TRAVEL...HAVE A WINTER SURVIVAL KIT WITH YOU. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE. && $$ COZ038>040-042>045-190500- /O.UPG.KBOU.WS.A.0005.121219T1200Z-121220T0000Z/ /O.NEW.KBOU.WW.Y.0022.121219T1000Z-121220T0000Z/ 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-NORTHEAST WELD COUNTY- CENTRAL AND SOUTH WELD COUNTY-MORGAN COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- INCLUDING THE CITIES OF...FORT COLLINS...HEREFORD...LOVELAND... NUNN...ARVADA...BOULDER...GOLDEN...LAKEWOOD...LONGMONT...AURORA... BRIGHTON...CITY OF DENVER...DENVER INTERNATIONAL AIRPORT... HIGHLANDS RANCH...LITTLETON...PARKER...BRIGGSDALE...GROVER... PAWNEE BUTTES...RAYMER...STONEHAM...EATON...FORT LUPTON... GREELEY...ROGGEN...BRUSH...FORT MORGAN...GOODRICH...WIGGINS... BENNETT...BYERS...DEER TRAIL...LEADER 156 PM MST TUE DEC 18 2012 ...WINTER WEATHER ADVISORY IN EFFECT FROM 3 AM TO 5 PM MST WEDNESDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW...WHICH IS IN EFFECT FROM 3 AM TO 5 PM MST WEDNESDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * TIMING...SNOW WILL DEVELOP LATE TONIGHT AND CONTINUE THROUGH WEDNESDAY AFTERNOON. THE HEAVIEST SNOWFALL RATES WILL OCCUR IN THE MORNING. * MAIN IMPACT...TOTAL SNOW ACCUMULATIONS OF 3 TO 8 INCHES POSSIBLE. NORTH TO NORTHEAST WINDS 20 TO 30 MPH WITH GUSTS TO 40 MPH WILL PRODUCE EXTENSIVE BLOWING AND DRIFTING SNOW. * OTHER IMPACTS...ROAD CLOSURES POSSIBLE DUE TO BLOWING AND DRIFTING SNOW...INCLUDING INTERSTATES 70 AND 76. TRAVEL MAY BE DIFFICULT AREA-WIDE DURING THE MORNING HOURS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ COZ031-033-034-190500- /O.NEW.KBOU.WW.Y.0022.121219T0600Z-121220T0000Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK 156 PM MST TUE DEC 18 2012 ...WINTER WEATHER ADVISORY IN EFFECT FROM 11 PM THIS EVENING TO 5 PM MST WEDNESDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 11 PM THIS EVENING TO 5 PM MST WEDNESDAY. * TIMING...SNOW WILL INCREASE ACROSS THE MOUNTAINS THIS EVENING...BECOMING HEAVY LATE TONIGHT. * SNOW AMOUNTS...6 TO 14 INCHES OF NEW SNOW CAN BE EXPECTED. * MAIN IMPACT...TRAVEL WILL BE IMPACTED DUE TO SNOWFALL. INCREASING WINDS LATE TONIGHT WILL CREATE AREAS OF BLOWING AND DRIFTING WHICH WILL RESTRICT VISIBILITIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ COZ035-036-190500- /O.NEW.KBOU.WW.Y.0022.121219T1000Z-121220T0000Z/ 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 156 PM MST TUE DEC 18 2012 ...WINTER WEATHER ADVISORY IN EFFECT FROM 3 AM TO 5 PM MST WEDNESDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 3 AM TO 5 PM MST WEDNESDAY. * TIMING...SNOW WILL SPREAD ACROSS THE FOOTHILLS LATE TONIGHT AND CONTINUE WEDNESDAY. * MAIN IMPACT...SNOW AMOUNTS OF 4 TO 8 INCHES CAN BE EXPECTED. * OTHER IMPACTS...TRAVEL MAY BECOME IMPACTED WITH SNOWPACKED ROADWAYS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
What forecasters said that day
The local office's own words before this winter storm watch 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 watch went out at Dec 17, 3:34 PM MST, 2 minutes earlier.
Area forecast discussion, Dec 17, 3:34 PM MST, 2 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER/BOULDER CO 334 PM MST MON DEC 17 2012 .SHORT TERM...WEB CAMS SHOWING SNOW ACROSS MOUNTAINS CONTINUING...THOUGH A BIT IMPROVEMENT IN THE LAST FEW HOURS. ALSO SOME GUSTS AROUND 50 MPH ALONG THE DIVIDE...WHICH HAS BEEN CREATING AREAS OF BLOWING AND DRIFITING SNOW. LATEST SNOWTELL OBS SUGGESTING ABOUT 6 INCHES OF SNOW HAD FALLEN ACROSS ZONE 31 IN THE LAST 6 HOURS...WITH PERHAPS 2 TO 4 INCHES FOR ZONES 33 AND 34. ACROSS FOOTHILLS AND ALONG URBAN CORRIDOR...WESTERLY WINDS GUSTING IN THE 30-40 MPH RANGE MOST AREAS. STRONG PACIFIC JET STILL EXPECTED TO MOVE ACROSS NORTHERN COLORADO DURING THE EVENING AND OVERNIGHT WITH STRONGER WINDS LOWERING TO NEAR MOUNTAIN TOP. MODEL CROSS SECTIONS INDICATING INCREASING LAPSE RATES ALONG WITH MID LEVEL ASCENT. SHOULD SEE MOUNTAIN SNOW BEGIN TO INCREASE AGAIN DURING THE EVENING AS THE LIFT INCREASES. LOCAL SNOW MODEL STILL YIELDING ROUGHLY 5-10 INCHES ACROSS ZONE 31 TONIGHT...WITH AROUND 4-8 INCHES FOR ZONES 33 AND 34. THIS LOOKS REASONABLE BUT MAY NEED TO ADD A FEW INCHES FOR THE DYNAMICS. FEEL CURRENT WARNING FOR ZONE 31 AND ADVISORY FOR 33 STILL ON TRACK. BUT WILL ALSO INCLUDE ZONE 34 IN THE ADVISORY...THOUGH AMOUNTS MAY NOT MEET CRITERIA THERE WILL BE SUFFICIENT BLOWING SNOW. ACROSS PLAINS SHOULD SEE WINDS BEGIN TO DECOUPLE THOUGH WILL REMAIN A BIT GUSTY NEAR THE FOOTHILLS. LATEST RUC SHOWS SOME LIGHT PRECIP ACROSS ZONE 38 THIS EVENING...STILL LOOKS REASONABLE WITH THE APPROACHING LIFT. ON TUESDAY...FLOW ALOFT WEAKENS A BIT AS THE JET CORE HEADS EAST AND BECOMES MORE SOUTHWEST AS AN UPPER TROUGH APPROACHES THE GREAT BASIN. WILL STILL BE A BIT GUSTY ACROSS THE RIDGES. SOUTHWEST FLOW NOT FAVORABLE FOR DECENT MOUNTAIN SNOWFALL. MID LEVEL QG ACENT ALSO DECREASES. WOULD EXPECT SNOW TO CONTINUE WITH FAIRLY GOOD MOISTURE...BUT SHOULD BE LIGHT. WILL NOT EXTEND HILITES BEYOND 12Z. ACROSS PLAINS...SURFACE WINDS TO BECOME EASTERLY WITH THE DEVELOPMENT OF AN ANTICYCLONE. LATEST GFS AND ECMWF SHOWS SOME LIGHT QPF DURING THE AFTERNOON...MAY BE A BIT OVERDONE AS LOW LEVEL STILL LOOK DRY. .LONG TERM...MODELS CONTINUE TO ADVERTISE A SIGNIFICANT WINTER WEATHER EVENT ACROSS THE FORECAST AREA ON WEDNESDAY. FROM TUESDAY EVENING THROUGH WEDNESDAY EVENING AN UPPER TROUGH WILL BE MOVING OVER THE STATE WHILE A SURFACE LOW OVER SOUTHEAST COLORADO UNDERGOES STRONG CYCLOGENESIS. A STRONG COLD FRONT WILL MOVE OVER NORTHERN COLORADO...INCLUDING THE MOUNTAINS...TUESDAY EVENING. UPSLOPE WINDS WILL THEN CONTINUE THROUGH THE PRE-DAWN HOURS AND STRENGTHEN THROUGH THE DAY WEDNESDAY. THE UPPER TROUGH WILL CONTAIN PLENTY OF DYNAMICS ACCORDING TO THE Q-G DIAGNOSTICS PACKAGE. THE PRESENCE OF THE STRONG UPPER LEVEL JET OVER THE PAST FEW DAYS MAKE THE MODEL SOLUTIONS VERY BELIEVABLE. THE NAM QPF AMOUNTS ARE A FAIR AMOUNT HIGHER THAN THE GFS AND ECMWF SOLUTIONS CONCERNING HOW MUCH SNOW WE GET ON WEDNESDAY. ALL MODELS AGREE QUITE A BIT OF WIND DEVELOPING. WITH THE THREAT OF SIGNIFICANT BLOWING SNOW BECAUSE OF THE WIND...WILL ISSUE A WINTER STORM WATCH ACROSS THE PLAINS. SNOW AMOUNTS OF 3 TO 6 INCHES WILL BE TOO LIGHT IF THE NAM IS RIGHT. WIND GUSTS OF 25 TO 40 MPH MIGHT BE COMMON AT THE HEIGHT OF THE STORM. PERIODS OF SNOW WILL BE ONGOING IN THE MOUNTAINS DUE TO THE DYNAMICS OVER THE STATE. THE UPPER TROUGH WILL BE MOVING EAST OF COLORADO BY WEDNESDAY EVENING WHICH WILL BRING A RAPID END TO THE SNOW EVENT. LINGERING SHOWERS IN THE EVENING WILL COME TO AN END OVERNIGHT. FOR THE PERIOD THURSDAY THROUGH SUNDAY...STRONG UPPER RIDGING WILL BE OVER THE STATE WITH DRY WEATHER FROM THE MOUNTAINS EASTWARD WITH TEMPERATURES TRENDING TOWARD SEASONAL NORMALS. EARLY NEXT WEEK LOOKS LIKE ANOTHER TROUGH MAY BE APPROACHING THE STATE IF THE ECMWF IS CORRECT. FOR THE TIME BEING WILL JUST MENTION AN INCREASING CHANCE OF SNOW IN THE MOUNTAINS AS THE STATE COMES UNDER THE SOUTHWESTERLY FLOW AHEAD OF THE TROUGH. && .AVIATION...WESTERLY WINDS TO CONTINUE ACROSS THE DENVER AREA THROUGH 02Z...WITH SOME GUSTS TO TO 35 KTS. WINDS TO DECREASE AT DEN AND APA AND BECOME SOUTHWESTERLY DURING THE EVENING BUT SHOULD REMAIN WESTERLY AND GUSTY AT BJC. AFTER 15Z TUESDAY... MODELS SHOW THE DEVELOPMENT OF AN ANTICYCLONE IN THE DENVER AREA...WITH WIND BECOMING EASTERLY. VFR TO CONTINUE WITH NO PRECIPITATION EXPECTED. && .BOU WATCHES/WARNINGS/ADVISORIES... WINTER STORM WATCH FROM LATE TUESDAY NIGHT THROUGH WEDNESDAY AFTERNOON FOR COZ038>051. WINTER WEATHER ADVISORY UNTIL 5 AM MST TUESDAY FOR COZ034. WINTER WEATHER ADVISORY UNTIL 5 AM MST TUESDAY FOR COZ033. WINTER STORM WARNING UNTIL 5 AM MST TUESDAY FOR COZ031. && SHORT TERM...D-L LONG TERM....DANKERS AVIATION...D-L
Hazardous weather outlook, Dec 17, 11:10 AM MST, 4 hours 26 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER/BOULDER CO 1110 AM MST MON DEC 17 2012 COZ030>051-181815- 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- 1110 AM MST MON DEC 17 2012 ...SNOW AND STRONG WINDS TO AFFECT THE NORTHERN COLORADO HIGH COUNTRY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT SNOW AND GUSTY WINDS WILL AFFECT THE HIGH COUNTRY THROUGH TONIGHT...ESPECIALLY ALONG AND WEST OF THE CONTINENTAL DIVIDE. HEAVY SNOWFALL IS LIKELY BY NIGHTFALL IN THE GORE AND PARK RANGES ROUGHLY NORTH OF I-70 WHERE 10 TO 16 INCHES OF SNOW COULD ACCUMULATE BY TUESDAY MORNING. MOUNTAIN AREAS FARTHER EAST IN EASTERN JACKSON...EASTERN GRAND AND SUMMIT COUNTIES...COULD SEE UPWARDS OF 5 TO 10 INCHES OF NEW SNOW ACCUMULATION BY MORNING. IN ADDITION TO THE SNOWFALL...WESTERLY WINDS OF 20 TO 35 MPH AND GUSTS AS HIGH AS 65 MPH WILL ALSO PRODUCE CONSIDERABLE BLOWING AND DRIFTING SNOW ABOVE TIMBERLINE AND ON MANY OF THE HIGH MOUNTAIN PASSES. DIVING CONDITIONS COULD DETERIORATE TO A POINT WHERE MANY HIGH COUNTRY ROADS MAY BECOME IMPASSABLE OVERNIGHT. PEOPLE PLANNING TRAVEL IN THE HIGH COUNTRY ARE URGED TO CHECK WITH THE COLORADO DEPARTMENT OF TRANSPORTATION FOR THE LATEST ROAD CONDITIONS BEFORE DEPARTING. ACROSS THE PLAINS...WESTERLY WINDS OF 20 TO 30 MPH WILL PREVAIL THIS AFTERNOON WITH GUSTS AS HIGH AS 50 MPH ALONG THE URBAN CORRIDOR. THE WINDS WILL DECREASE DURING THE EVENING. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY STRONG WESTERLY FLOW ALOFT AND UPPER LEVEL DISTURBANCES WILL CONTINUE MOVING ACROSS NORTHERN COLORADO THROUGH WEDNESDAY. OCCASIONAL SNOW AND GUSTY WINDS WILL CONTINUE OVER THE MOUNTAINS WITH WIND GUSTS UP TO 60 MPH OVER RIDGES AND ALONG EASTERN MOUNTAIN SLOPES. PERIODS OF MODERATE SNOWFALL MAY CAUSE DIFFICULT TRAVEL AT TIMES. ON TUESDAY NIGHT...A STRONG COLD FRONT WILL MOVE INTO NORTHEAST COLORADO AND COMBINE WITH A VIGOROUS UPPER LEVEL TROUGH TO PRODUCE A ROUND OF SNOW AND WIND ACROSS THE PLAINS THAT WILL LAST THROUGH WEDNESDAY. COLDER TEMPERATURES...GUSTY NORTH WINDS AND SNOW ARE EXPECTED TO CONTINUE THROUGH THE DAY. THERE IS THE POTENTIAL FOR 3 TO 6 INCHES OF SNOW ON THE PLAINS BY WEDNESDAY EVENING. AREAS OF BLOWING AND DRIFTING SNOW WILL ALSO CAUSE POOR VISIBILITIES AND MAY MAKE TRAVEL DIFFICULT ACROSS THE PLAINS. SNOW WILL ALSO CONTINUE FALLING IN THE MOUNTAINS. DRIER CONDITIONS AND GRADUALLY WARMING TEMPERATURES WILL RETURN THURSDAY THROUGH SUNDAY ACROSS NORTHERN COLORADO AS AN UPPER RIDGE BUILDS OVER THE STATE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.
Nearby
Winter Storm Watches in Colorado, 2012Every winter storm watch in 2012
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.