Alert archive / Colorado / Snow Advisories in 2007
Snow Advisory 2, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this snow advisory at Jan 12, 2007, 2:10 AM MST for 5 counties in Colorado. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- Jan 12, 2007, 2:10 AM MST (09:10 UTC)
- Expired
- Jan 12, 2007, 3:41 PM MST
- In force
- 14 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Boulder County, CO, Grand County, CO, Jackson County, CO, Larimer County, CO, Summit County, CO
The nearest sounding before it
Denver, CO (KDNR), launched 00:00Z, 9.2 hours before the alert went out and 229 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
- 606 m above ground
- 0-6 km bulk shear
- 74 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 185 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS45 KBOU 120910 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 210 AM MST FRI JAN 12 2007 ...SNOW POSSIBLY HEAVY AT TIMES IN THE NORTHERN MOUNTAINS...WHILE LIGHT SNOW...FREEZING DRIZZLE AND FOG WILL CONTINUE IN AND ALONG THE FRONT RANGE FOOTHILLS... .AN UPPER LEVEL STORM SYSTEM ORGANIZING TO THE WEST OF COLORADO WILL CONTINUE IT MOVE SLOWLY EASTWARD TOWARD COLORADO DURING THE NEXT 36 HOURS. AS IT DOES EXPECT AN INCREASE SNOWFALL TODAY IN THE NORTHERN MOUNTAINS AND HIGH MOUNTAIN VALLEYS OF COLORADO. SNOWFALL MAY BECOME HEAVY AT TIMES ESPECIALLY ALONG AND WEST OF THE CONTINENTAL DIVIDE. GUSTY SOUTHWEST MAY ALSO PRODUCE SOME BLOWING AND DRIFTING SNOW ON THE HIGH MOUNTAIN PASSES. FURTHERMORE ADEQUATE SNOW TIRES OR TIRE CHAINS MAY BECOME NECESSARY ON MANY HIGH COUNTRY ROADS...INCLUDING U.S. HIGHWAY 34 OVER CAMERON PASS AND U.S. HIGHWAY 40 OVER BERTHOUD PASS. IN AND ALONG THE FRONT RANGE FOOTHILLS...A MIXTURE OF LIGHT SNOW...FREEZING DRIZZLE AND FOG WILL CONTINUE THROUGH THE REST OF TONIGHT. THE HEAVIEST SNOW SHOULD OCCUR IN THE HIGHER FOOTHILLS OF BOULDER AND LARIMER COUNTIES. MEANWHILE...A MIXTURE OF FREEZING DRIZZLE AND SNOW WILL PRODUCE HAZARDOUS DRIVING CONDITIONS IN PORTIONS OF THE FRONT RANGE URBAN CORRIDOR. ALLOW PLENTY OF EXTRA TIME TO REACH YOUR AND USE LOW BEAM HEADLINES WHEN EN COUNTING DENSE FOG. COZ031-033-121715- /O.NEW.KBOU.SN.Y.0002.070112T0910Z-070113T1200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- INCLUDING...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 210 AM MST FRI JAN 12 2007 ...SNOW ADVISORY IN EFFECT UNTIL 5 AM MST SATURDAY FOR THE NORTHERN MOUNTAINS... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SNOW ADVISORY...WHICH IS IN EFFECT UNTIL 5 AM MST SATURDAY. LOOK FOR SNOWFALL TO INCREASE IN THE MOUNTAINS OF NORTHERN COLORADO THE REST OF TONIGHT AND THROUGH THE DAY FRIDAY. SNOW MAY BE HEAVY AT TIMES OVER THE HIGH MOUNTAIN PASSES AND WEST FACING MOUNTAIN SLOPES. TOTAL SNOW ACCUMULATIONS BY LATE FRIDAY NIGHT WILL RANGE FROM 6 TO 12 INCHES. SOUTHWEST WINDS OF 20 TO 35 MPH MAY ALSO PRODUCE SOME BLOWING AND DRIFTING SNOW ON THE HIGH MOUNTAIN PASSES. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE SOME TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ COZ030-032-121715- /O.NEW.KBOU.SN.Y.0002.070112T0910Z-070113T1200Z/ JACKSON COUNTY BELOW 9000 FEET- GRAND AND SUMMIT COUNTIES BELOW 9000 FEET- INCLUDING...GOULD...NORTH PARK...RAND...SPICER...WALDEN... DILLON...FRASER...GRANBY...GRAND LAKE...HOT SULPHUR SPRINGS... KREMMLING 210 AM MST FRI JAN 12 2007 ...SNOW ADVISORY IN EFFECT UNTIL 5 AM MST SATURDAY FOR NORTH AND MIDDLE PARKS IN NORTH CENTRAL COLORADO... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SNOW ADVISORY...WHICH IS IN EFFECT UNTIL 5 AM MST SATURDAY. SNOW WILL SPREAD OVER THE HIGH MOUNTAIN VALLEYS THE REST OF TONIGHT...AND CONTINUE FOR MUCH OF FRIDAY AND FRIDAY NIGHT. SNOWFALL RATES WILL GENERALLY REMAIN OF THE LIGHT SIDE...ALTHOUGH AS MUCH AS 4 TO 8 INCHES OF SNOW ACCUMULATION IS ANTICIPATED BY LATE FRIDAY NIGHT. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE SOME TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ COZ038>041-043-121300- /O.CON.KBOU.WW.Y.0001.000000T0000Z-070112T1300Z/ 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- CENTRAL AND SOUTH WELD COUNTY- INCLUDING...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...EATON...FORT LUPTON...GREELEY...ROGGEN 210 AM MST FRI JAN 12 2007 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MST EARLY THIS MORNING FOR THE FRONT RANGE INTERSTATE 25 URBAN CORRIDOR... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MST EARLY THIS MORNING. A MIXTURE OF SNOW...FREEZING DRIZZLE AND FOG ARE EXPECTED ALONG THE COLORADO FRONT RANGE...INCLUDING THE GREATER DENVER METRO AREA FOR THE REST OF TONIGHT. ADDITIONAL SNOW ACCUMULATIONS SHOULD REMAIN ON THE LIGHT SIDE...GENERALLY LESS THAN 2 INCHES. A WINTER WEATHER ADVISORY MEANS THAT SNOW...FREEZING DRIZZLE AND FOG WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR ICY AND SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING ESPECIALLY OVER BRIDGES AND OVERPASSES. $$ COZ035-036-121300- /O.CON.KBOU.WW.Y.0001.000000T0000Z-070112T1300Z/ LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- INCLUDING...ESTES PARK...GLENDEVEY...NEDERLAND... RED FEATHER LAKES...BAILEY...CENTRAL CITY...EVERGREEN... GEORGETOWN...IDAHO SPRINGS...WESTCREEK 210 AM MST FRI JAN 12 2007 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MST EARLY THIS MORNING FOR THE FRONT RANGE FOOTHILLS... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MST EARLY THIS MORNING. SNOW WILL CONTINUE OVERNIGHT IN THE FRONT RANGE FOOTHILLS. THE SNOW WILL BE ACCOMPANIED BY FOG AND MIXED AT TIMES WITH FREEZING DRIZZLE ESPECIALLY AT ELEVATIONS BELOW 8000 FEET. ADDITIONAL SNOW ACCUMULATIONS OF 2 TO 5 INCHES CAN BE EXPECTED BY DAYBREAK...WITH THE HEAVIER AMOUNTS OCCURRING IN THE HIGH FOOTHILLS OF BOULDER AND LARIMER COUNTIES. A WINTER WEATHER ADVISORY MEANS THAT SNOW...FREEZING DRIZZLE...AND FOG WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR ICY AND SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ BAKER
4 follow-up statements
000 WWUS45 KBOU 120932 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 232 AM MST FRI JAN 12 2007 ...SNOW POSSIBLY HEAVY AT TIMES IN THE NORTHERN MOUNTAINS...WHILE LIGHT SNOW...FREEZING DRIZZLE AND FOG WILL CONTINUE FOR REST OF TONIGHT IN AND ALONG THE FRONT RANGE FOOTHILLS... .AN UPPER LEVEL STORM SYSTEM ORGANIZING TO THE WEST OF COLORADO WILL SLOWLY MOVE EASTWARD TOWARD COLORADO DURING THE NEXT 36 HOURS. AS IT DOES EXPECT AN INCREASE IN SNOWFALL TODAY IN THE NORTHERN MOUNTAINS AND HIGH MOUNTAIN VALLEYS OF COLORADO. SNOWFALL MAY BECOME HEAVY AT TIMES ESPECIALLY ALONG AND WEST OF THE CONTINENTAL DIVIDE. GUSTY SOUTHWEST MAY ALSO PRODUCE SOME BLOWING AND DRIFTING SNOW ON THE HIGH MOUNTAIN PASSES. ADEQUATE SNOW TIRES OR TIRE CHAINS MAY BECOME NECESSARY ON MANY HIGH COUNTRY ROADS...INCLUDING U.S. HIGHWAY 34 OVER CAMERON PASS AND U.S. HIGHWAY 40 OVER BERTHOUD PASS. IN AND ALONG THE FRONT RANGE FOOTHILLS...A MIXTURE OF LIGHT SNOW...FREEZING DRIZZLE AND FOG WILL CONTINUE THROUGH THE REST OF TONIGHT. THE HEAVIEST SNOW SHOULD OCCUR IN THE HIGHER FOOTHILLS OF BOULDER AND LARIMER COUNTIES. MEANWHILE...A MIXTURE OF FREEZING DRIZZLE...SNOW AND FOG WILL PRODUCE HAZARDOUS DRIVING CONDITIONS IN PORTIONS OF THE FRONT RANGE URBAN CORRIDOR FOR AT LEAST THE REST OF TONIGHT. ALLOW PLENTY OF EXTRA TIME TO REACH YOUR DESTINATION AND USE LOW BEAM HEADLINES WHEN ENCOUNTERING DENSE FOG. COZ031-033-121745- /O.CON.KBOU.SN.Y.0002.000000T0000Z-070113T1200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- INCLUDING...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 232 AM MST FRI JAN 12 2007 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY FOR THE NORTHERN MOUNTAINS... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SNOW ADVISORY...WHICH IS IN EFFECT UNTIL 5 AM MST SATURDAY. LOOK FOR SNOWFALL TO INCREASE IN THE MOUNTAINS OF NORTHERN COLORADO THE REST OF TONIGHT AND THROUGH THE DAY FRIDAY. SNOW MAY BE HEAVY AT TIMES OVER THE HIGH MOUNTAIN PASSES AND ON WEST FACING MOUNTAIN SLOPES. TOTAL SNOW ACCUMULATIONS BY LATE FRIDAY NIGHT WILL RANGE FROM 6 TO 12 INCHES. SOUTHWEST WINDS OF 20 TO 35 MPH MAY ALSO PRODUCE SOME BLOWING AND DRIFTING SNOW ON THE HIGH MOUNTAIN PASSES. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE SOME TRAVEL DIFFICULTIES. BE PREPARED FOR ICE AND SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ COZ030-032-121745- /O.CON.KBOU.SN.Y.0002.000000T0000Z-070113T1200Z/ JACKSON COUNTY BELOW 9000 FEET- GRAND AND SUMMIT COUNTIES BELOW 9000 FEET- INCLUDING...GOULD...NORTH PARK...RAND...SPICER...WALDEN... DILLON...FRASER...GRANBY...GRAND LAKE...HOT SULPHUR SPRINGS... KREMMLING 232 AM MST FRI JAN 12 2007 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY FOR NORTH AND MIDDLE PARKS IN NORTHERN COLORADO... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SNOW ADVISORY...WHICH IS IN EFFECT UNTIL 5 AM MST SATURDAY. SNOW WILL SPREAD OVER THE HIGH MOUNTAIN VALLEYS OF NORTHERN COLORADO THE REST OF TONIGHT...AND CONTINUE INTERMITTENTLY THROUGH FRIDAY NIGHT. SNOWFALL RATES WILL GENERALLY REMAIN OF THE LIGHT SIDE...ALTHOUGH AS MUCH AS 4 TO 8 INCHES OF SNOW ACCUMULATION IS ANTICIPATED BY LATE FRIDAY NIGHT. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE SOME TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ COZ038>041-043-121300- /O.CON.KBOU.WW.Y.0001.000000T0000Z-070112T1300Z/ 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- CENTRAL AND SOUTH WELD COUNTY- INCLUDING...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...EATON...FORT LUPTON...GREELEY...ROGGEN 232 AM MST FRI JAN 12 2007 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MST EARLY THIS MORNING FOR THE FRONT RANGE INTERSTATE 25 URBAN CORRIDOR... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MST EARLY THIS MORNING. A MIXTURE OF SNOW...FREEZING DRIZZLE AND FOG ARE EXPECTED ALONG THE COLORADO FRONT RANGE...INCLUDING THE GREATER DENVER METRO AREA...FOR THE REST OF TONIGHT. ADDITIONAL SNOW ACCUMULATIONS SHOULD REMAIN ON THE LIGHT SIDE...GENERALLY LESS THAN 2 INCHES. A WINTER WEATHER ADVISORY MEANS THAT SNOW...FREEZING DRIZZLE AND FOG WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR ICY AND SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING ESPECIALLY OVER BRIDGES AND OVER PASSES. $$ COZ035-036-121300- /O.CON.KBOU.WW.Y.0001.000000T0000Z-070112T1300Z/ LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- INCLUDING...ESTES PARK...GLENDEVEY...NEDERLAND... RED FEATHER LAKES...BAILEY...CENTRAL CITY...EVERGREEN... GEORGETOWN...IDAHO SPRINGS...WESTCREEK 232 AM MST FRI JAN 12 2007 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MST EARLY THIS MORNING FOR THE FRONT RANGE FOOTHILLS... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 AM MST EARLY THIS MORNING. SNOW WILL CONTINUE OVERNIGHT IN THE FRONT RANGE FOOTHILLS. THE SNOW WILL BE ACCOMPANIED BY FOG AND MIXED AT TIMES WITH FREEZING DRIZZLE ESPECIALLY AT ELEVATIONS BELOW 8000 FEET. ADDITIONAL SNOW ACCUMULATIONS OF 2 TO 5 INCHES CAN BE EXPECTED BY DAYBREAK...WITH THE HEAVIER AMOUNTS OCCURRING IN THE HIGH FOOTHILLS OF BOULDER AND LARIMER COUNTIES. A WINTER WEATHER ADVISORY MEANS THAT SNOW...FREEZING DRIZZLE...AND FOG WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR ICY AND SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ BAKER
000 WWUS45 KBOU 121240 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 540 AM MST FRI JAN 12 2007 ...SNOW AND BLOWING SNOW IN THE MOUNTAINS...AND LIGHT SNOW... FREEZING DRIZZLE AND FOG ON THE PLAINS WILL CONTINUE TODAY AND TONIGHT... .A WINTER STORM SYSTEM IN THE GREAT BASIN WILL SLOWLY MOVE EASTWARD TOWARD COLORADO DURING THE NEXT 24 HOURS. AS IT DOES EXPECT SNOWFALL TO CONTINUE IN THE MOUNTAINS AND HIGH VALLEYS OF COLORADO. SNOWFALL MAY BECOME HEAVY AT TIMES ALONG AND WEST OF THE CONTINENTAL DIVIDE LATER TODAY...ESPECIALLY NORTH OF THE INTERSTATE 70 CORRIDOR. GUSTY SOUTHWEST WILL ALSO PRODUCE AREAS OF BLOWING AND DRIFTING SNOW ON SOME OF THE HIGH MOUNTAIN PASSES. IN THE FRONT RANGE FOOTHILLS...AND ACROSS THE FRONT RANGE URBAN CORRIDOR...INCLUDING THE DENVER METRO AREA...LIGHT SNOW MIXED AT TIMES WITH FREEZING DRIZZLE AND AREAS OF FOG WILL CONTINUE TO REDUCE VISIBILITIES AND PRODUCE DIFFICULT DRIVING CONDITIONS THROUGH TONIGHT. ALLOW PLENTY OF EXTRA TIME TO REACH YOUR DESTINATION AND USE LOW BEAM HEADLIGHT WHEN ENCOUNTERING DENSE FOG. COZ035-122045- /O.CAN.KBOU.WW.Y.0001.000000T0000Z-070112T1300Z/ /O.EXA.KBOU.SN.Y.0002.000000T0000Z-070113T1200Z/ LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- INCLUDING...ESTES PARK...GLENDEVEY...NEDERLAND... RED FEATHER LAKES 540 AM MST FRI JAN 12 2007 ...WINTER WEATHER ADVISORY IS CANCELLED... ...SNOW ADVISORY IN EFFECT UNTIL 5 AM MST SATURDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SNOW ADVISORY FOR THE NORTHERN FRONT RANGE FOOTHILLS...WHICH IS IN EFFECT UNTIL 5 AM MST SATURDAY. THE WINTER WEATHER ADVISORY HAS BEEN CANCELLED. SNOW WILL CONTINUE TODAY THROUGH TONIGHT IN THE NORTHERN FRONT RANGE FOOTHILLS. THE SNOW MAY BE MIXED WITH FREEZING DRIZZLE AT TIMES AT ELEVATIONS BELOW 8000 FEET. ADDITIONAL SNOW ACCUMULATIONS OF 4 TO 8 INCHES CAN BE EXPECTED BY LATE TONIGHT. FOG MAY ALSO REDUCE VISIBILITIES TO LESS THAN A MILE AT TIMES BELOW 8000 FEET. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW...FOG AND FREEZING DRIZZLE WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR ICE AND SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ COZ045-122045- /O.EXB.KBOU.WW.Y.0001.000000T0000Z-070113T0600Z/ CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- INCLUDING...BENNETT...BYERS...DEER TRAIL...LEADER 540 AM MST FRI JAN 12 2007 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 11 PM MST THIS EVENING... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR THE EASTERN HALF OF ADAMS AND ARAPAHOE COUNTIES EAST OF DENVER...WHICH IS IN EFFECT UNTIL 11 PM MST THIS EVENING. LIGHT SNOW...MIXED AT TIMES WITH FREEZING DRIZZLE AND FOG ARE EXPECTED TODAY AND THIS EVENING. SNOW ACCUMULATION SHOULD REMAIN ON THE LIGHT SIDE...GENERALLY LESS THAN 3 INCHES. A WINTER WEATHER ADVISORY MEANS THAT SNOW...FREEZING DRIZZLE AND FOG WILL CAUSE DIFFICULT TRAVEL CONDITIONS. BE PREPARED FOR ICY AND SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ COZ038>041-043-122045- /O.EXT.KBOU.WW.Y.0001.000000T0000Z-070113T0600Z/ 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- CENTRAL AND SOUTH WELD COUNTY- INCLUDING...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...EATON...FORT LUPTON...GREELEY...ROGGEN 540 AM MST FRI JAN 12 2007 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 11 PM MST THIS EVENING... THE WINTER WEATHER ADVISORY IS NOW IN EFFECT UNTIL 11 PM MST THIS EVENING FOR THE FRONT RANGE URBAN CORRIDOR...INCLUDING THE GREATER DENVER METROPOLITAN AREA. LIGHT SNOW...MIXED AT TIMES WITH FREEZING DRIZZLE AND FOG ARE EXPECTED ALONG THE COLORADO FRONT RANGE TODAY THROUGH THIS EVENING. ADDITIONAL SNOW ACCUMULATIONS BY LATE THIS EVENING WILL RANGE FROM 2 TO 4 INCHES...WITH THE HIGHER AMOUNTS NEAR THE FOOTHILLS. A WINTER WEATHER ADVISORY MEANS THAT SNOW...FREEZING DRIZZLE AND FOG WILL CAUSE DIFFICULT TRAVEL CONDITIONS. BE PREPARED FOR ICY AND SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION ESPECIALLY WHEN DRIVING OVER BRIDGES AND OVER PASSES. $$ COZ036-122045- /O.EXT.KBOU.WW.Y.0001.000000T0000Z-070113T0600Z/ JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- INCLUDING...BAILEY...CENTRAL CITY...EVERGREEN...GEORGETOWN... IDAHO SPRINGS...WESTCREEK 540 AM MST FRI JAN 12 2007 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 11 PM MST THIS EVENING... THE WINTER WEATHER ADVISORY IS NOW IN EFFECT FOR THE SOUTHERN FRONT RANGE FOOTHILLS UNTIL 11 PM MST THIS EVENING. LIGHT SNOW IS LIKELY IN THE SOUTHERN FRONT RANGE FOOTHILLS THROUGH THIS EVENING. SNOW MAY BE MIXED WITH FREEZING DRIZZLE AT TIMES...MAINLY BELOW BELOW 8000 FEET. FOG MAY ALSO REDUCE VISIBILITIES TO LESS THAN A MILE AT TIMES. ADDITIONAL SNOW ACCUMULATIONS OF 1 TO 4 INCHES CAN BE EXPECTED BY LATE THIS EVENING. A WINTER WEATHER ADVISORY MEANS THAT SNOW...FREEZING DRIZZLE... AND FOG WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR ICY AND SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ COZ031-033-122045- /O.CON.KBOU.SN.Y.0002.000000T0000Z-070113T1200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- INCLUDING...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 540 AM MST FRI JAN 12 2007 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... A SNOW ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY. SNOW IN THE MOUNTAINS OF NORTHERN COLORADO TODAY AND TONIGHT MAY BE HEAVY AT TIMES...ESPECIALLY ON THE HIGH MOUNTAIN PASSES AND WEST FACING MOUNTAIN SLOPES NORTH OF THE INTERSTATE 70 CORRIDOR. ADDITIONAL SNOW ACCUMULATIONS OF 6 TO 12 INCHES ARE LIKELY BY LATE FRIDAY NIGHT. SOUTHWEST WINDS OF 20 TO 35 MPH MAY ALSO PRODUCE AREAS OF BLOWING AND DRIFTING SNOW ON THE HIGH MOUNTAIN PASSES. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE DIFFICULT TRAVEL CONDITIONS. BE PREPARED FOR ICE AND SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ COZ030-032-122045- /O.CON.KBOU.SN.Y.0002.000000T0000Z-070113T1200Z/ JACKSON COUNTY BELOW 9000 FEET- GRAND AND SUMMIT COUNTIES BELOW 9000 FEET- INCLUDING...GOULD...NORTH PARK...RAND...SPICER...WALDEN... DILLON...FRASER...GRANBY...GRAND LAKE...HOT SULPHUR SPRINGS... KREMMLING 540 AM MST FRI JAN 12 2007 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... A SNOW ADVISORY REMAINS IN EFFECT FOR NORTH AND MIDDLE PARKS UNTIL 5 AM MST SATURDAY. SNOW IS LIKELY IN THE HIGH MOUNTAIN VALLEYS OF NORTHERN COLORADO THROUGH TONIGHT. SNOW ACCUMULATIONS WILL RANGE FROM 4 TO 8 INCHES...WITH THE HIGHER AMOUNTS NEAR THE BASE OF WEST FACING MOUNTAIN SLOPES. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE SOME TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$ BAKER
000 WWUS45 KBOU 121722 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 1022 AM MST FRI JAN 12 2007 ...SNOW AND BLOWING SNOW IN THE MOUNTAINS TO CONTINUE... .SNOW IS EXPECTED TO CONTINUE OVER THE MOUNTAINS WITH THIS LATEST WINTER STORM. BLOWING SNOW IS EXPECTED ABOVE 10000 FEET. THE COLD ARCTIC AIRMASS OVER THE PLAINS AND FOOTHILLS BELOW 8000 FEET IS EXPECTED TO STAY IN PLACE. VERY LIGHT SNOW AND SOME FOG WILL CONTINUE WITH LITTLE ACCUMULATION EXPECTED. LATER TONIGHT...THE SNOW MAY INCREASE A BIT WITH MODEST ACCUMAULTIONS POSSIBLE...BUT A SIGNIFICANT STORM IS NOT EXPECTED. COZ030-032-035-121830- /O.CAN.KBOU.SN.Y.0002.000000T0000Z-070113T1200Z/ JACKSON COUNTY BELOW 9000 FEET- GRAND AND SUMMIT COUNTIES BELOW 9000 FEET- LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- INCLUDING...GOULD...NORTH PARK...RAND...SPICER...WALDEN... DILLON...FRASER...GRANBY...GRAND LAKE...HOT SULPHUR SPRINGS... KREMMLING...ESTES PARK...GLENDEVEY...NEDERLAND... RED FEATHER LAKES 1022 AM MST FRI JAN 12 2007 ...SNOW ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE SNOW ADVISORY. $$ COZ036-038>041-043-045-121830- /O.CAN.KBOU.WW.Y.0001.000000T0000Z-070113T0600Z/ JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- LARIMER COUNTY BELOW 6000 FEET/NORTHWEST WELD COUNTY- BOULDER AND JEFFERSON COUNTIES BELOW 6000 FEET/WEST BROOMFIELD COUNTY- NORTH DOUGLAS COUNTY BELOW 6000 FEET/DENVER/WEST ADAMS AND ARAPAHOE COUNTIES/EAST BROOMFIELD COUNTY- ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- CENTRAL AND SOUTH WELD COUNTY- CENTRAL AND EAST ADAMS AND ARAPAHOE COUNTIES- INCLUDING...BAILEY...CENTRAL CITY...EVERGREEN...GEORGETOWN... IDAHO SPRINGS...WESTCREEK...FORT COLLINS...HEREFORD...LOVELAND... NUNN...ARVADA...BOULDER...GOLDEN...LAKEWOOD...LONGMONT...AURORA... BRIGHTON...CITY OF DENVER...DENVER INTERNATIONAL AIRPORT... HIGHLANDS RANCH...LITTLETON...PARKER...CASTLE ROCK...ELBERT... FONDIS...KIOWA...LARKSPUR...EATON...FORT LUPTON...GREELEY... ROGGEN...BENNETT...BYERS...DEER TRAIL...LEADER 1022 AM MST FRI JAN 12 2007 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE WINTER WEATHER ADVISORY. $$ COZ031-033-130130- /O.CON.KBOU.SN.Y.0002.000000T0000Z-070113T1200Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- INCLUDING...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 1022 AM MST FRI JAN 12 2007 ...SNOW ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY... A SNOW ADVISORY REMAINS IN EFFECT UNTIL 5 AM MST SATURDAY. SNOW AND BLOWING SNOW ARE EXPECTED IN THE MOUNTAINS OF NORTHERN COLORADO TODAY AND TONIGHT...ESPECIALLY ON THE HIGH MOUNTAIN PASSES AND WEST FACING MOUNTAIN SLOPES NORTH OF THE INTERSTATE 70 CORRIDOR. ADDITIONAL SNOW ACCUMULATIONS OF UP TO 6 INCHES ARE EXPECTED BY BY SATURDAY DAWN. SOUTHWEST WINDS OF 20 TO 35 MPH WILL CAUSE BLOWING AND DRIFTING SNOW ON THE HIGH MOUNTAIN PASSES. A SNOW ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE DIFFICULT TRAVEL CONDITIONS. BE PREPARED FOR ICE AND SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. $$
000 WWUS45 KBOU 122241 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 341 PM MST FRI JAN 12 2007 ...SNOW AND BLOWING SNOW IN THE MOUNTAINS TO CONTINUE... .LIGHT SNOW IS NOW FALLING IN THE NORTH CENTRALCOLORADOOMOUNTAINSS IS EXPECTED IN INCREASE THIS EVENING AND CONTINUE OVERNIGHT. FAIRLY STRONG WINDS ARE EXPECTED ABOVE 1000 FEET WHICH WILL CAUSE WIDESPREAD BLOWING SNOW. DIFFICULT WINTER DRIVING CONDITIONS ARE EXPECTED. COZ031-033-130645- /O.CAN.KBOU.SN.Y.0002.000000T0000Z-070113T1200Z/ /O.NEW.KBOU.SB.Y.0004.070112T2241Z-070113T1500Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- INCLUDING...EAST SLOPES PARK AND NORTHERN GORE RANGES... GORE PASS...RABBIT EARS PASS...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS 341 PM MST FRI JAN 12 2007 ...SNOW ADVISORY IS CANCELLED... ...SNOW AND BLOWING SNOW ADVISORY IN EFFECT UNTIL 8 AM MST SATURDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SNOW AND BLOWING SNOW ADVISORY...WHICH IS IN EFFECT UNTIL 8 AM MST SATURDAY. THE SNOW ADVISORY HAS BEEN CANCELLED. SNOW AND BLOWING SNOW ARE EXPECTED IN THE MOUNTAINS OF NORTH CENTRAL COLORADO TONIGHT. ADDITIONAL SNOW ACCUMULATIONS OF UP TO 6 INCHES ARE EXPECTED BY SATURDAY MORNING. SOUTHWEST WINDS OF 20 TO 40 MPH WILL CAUSE BLOWING AND DRIFTING SNOW IN AREAS ABOVE 10000 FEET. A SNOW AND BLOWING SNOW ADVISORY MEANS THAT VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. USE CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN AREAS. $$ COZ034-130645- /O.NEW.KBOU.SB.Y.0004.070112T2241Z-070113T1500Z/ SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING...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 341 PM MST FRI JAN 12 2007 ...SNOW AND BLOWING SNOW ADVISORY IN EFFECT UNTIL 8 AM MST SATURDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A SNOW AND BLOWING SNOW ADVISORY...WHICH IS IN EFFECT UNTIL 8 AM MST SATURDAY. SNOW AND BLOWING SNOW ARE EXPECTED IN THE MOUNTAINS OF NORTH CENTRAL COLORADO TONIGHT. ADDITIONAL SNOW ACCUMULATIONS OF UP TO 6 INCHES ARE EXPECTED BY SATURDAY MORNING. SOUTHWEST WINDS OF 20 TO 40 MPH WILL CAUSE BLOWING AND DRIFTING SNOW IN AREAS ABOVE 10000 FEET. A SNOW AND BLOWING SNOW ADVISORY MEANS THAT VISIBILITIES WILL BE LIMITED DUE TO A COMBINATION OF FALLING AND BLOWING SNOW. USE CAUTION WHEN TRAVELING...ESPECIALLY IN OPEN AREAS. $$
What forecasters said that day
The local office's own words before this snow advisory 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 snow advisory went out at Jan 11, 2:15 PM MST, 11 hours 55 minutes earlier.
Area forecast discussion, Jan 11, 2:15 PM MST, 11 hours 55 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER CO 215 PM MST THU JAN 11 2007 .SHORT TERM...TDA-TNGT...CDFNT MOVED S OVR PLAINS THIS MRNG. SHALLOW COLD ARCTIC AMS HAS SPRD OVR PLAINS BHND CDFNT AS SFC HI PRES BUILDS ACRS AREA. WILL KEEP CHC OF SNW AND LGT FRZG DRZL OVR PLAINS WITH SUM LGT SNW ACCUMS IN AND NR ERN FTHLLS AND HIR TRRN MNLY ON FRI. STG MOIST SWLY FLO ALF WILL CONT OVR MTNS IN ADV OF CLSD UPR LO OVR GRT BASIN. THIS WILL PRODUCE OROGRAPHIC SNW MTNS WITH THE HIEST AMTS OVR NRN MTNS TNGT. TEMPS WILL BE VRY COLD ON PLAINS WITH NOT MUCH DIURNAL CHNG DUE TO CLDNS...FOG AND LGT PCPN. MTNS AND HIR TRRN WILL BE WRMR. WILL GENLY FVR THE COOLER MOS TEMP GDNC VALUES. .LONG TERM...ON FRIDAY NIGHT...MODELS HAVE STRONG SOUTHWESTERLY FLOW ALOFT OVER THE FORECAST AREA. THIS CONTINUES SATURDAY. BY SATURDAY NIGHT THE SOUTHWESTERLY FLOW ALOFT IS DECREASING AS THE CLOSED CIRCULATION NEARS. THE NAM HAS A MORE PRONOUNCED CIRCULATION MOVE RIGHT ACROSS THE FORECAST AREA SUNDAY. THE GFS SHOWERS A MORE OPEN WAVE AND ITS A BIT SLOWER. THE GFS ALSO HAS ANOTHER CIRCULATION DEVELOP NEAR THE FOUR CORNERS LATE SUNDAY NIGHT/EARLY MONDAY MORNING. THE RUN TO RUN CONSISTENCY IS QUITE LACKING. THE QG VERTICAL VELOCITY FIELDS KEEP THE FORECAST AREA IN UPWARD MOTION FRIDAY NIGHT THROUGH HALF OF SUNDAY. IN THE LOWER LEVELS...BOTH MODELS KEEP UPSLOPE FLOW GOING...FOR THE MOST PART...OVER THE PLAINS AND FOOTHILLS THROUGH SUNDAY. ITS BEST SATURDAY NIGHT INTO SUNDAY MORNING. FORECAST SOUNDINGS POINT TO A FAIRLY SHALLOW COLD AIRMASS ...PROBABLY BELOW 9000 FEET MSL FOR FRIDAY NIGHT INTO SATURDAY NIGHT. ON SATURDAY NIGHT AND SUNDAY...COLDER AIR MOVES AND THE UPSLOPE IS A BIT DEEPER TOO. FOR MOISTURE...BOTH MODELS HAVE FAIRLY SHALLOW AMOUNTS OVER THE PLAINS THROUGH SATURDAY EVENING...THEN IT INCREASES WELL INTO SUNDAY. THE MOUNTAINS ARE MORE MOIST FRIDAY NIGHT THROUGH MUCH OF SUNDAY. FOR POPS AND PRECIPITATION TYPE...THE ONLY TIME LIKELY MEASURABLE SNOW IS EXPECTED FOR THE PLAINS AND FOOTHILLS WOULD BE LATER SATURDAY NIGHT INTO SUNDAY...OTHERWISE THE SHALLOW MOISTURE LAYER WITH LITTLE ABOVE ABOVE IT SHOULD ONLY YIELD FLURRIES. IT SEEMS TO COLD FOR FREEZING DRIZZLE BUT MAY KEEP SOME IN FRIDAY NIGHT FOR GOOD MEASURE. IN THE MOUNTAINS THE BETTER OROGRAPHIC ENHANCEMENT IS ON SUNDAY. PRIOR TO THAT...STRONG SOUTHWESTERLY MOUNTAIN-TOP FLOW WONT HELP IN OUR MOUNTAINS. THE LAPSE RATES ARE FAIRLY STEEP AND THERE IS SYNOPTIC SCALE ENERGY. WILL LEAVE THE LIKELY POPS IN AND EXTEND THEM INTO SUNDAY. ACCUMULATIONS ARE NOT GREAT USING THE SNOW MODEL. NO HIGHLIGHTS RIGHT NOW. FOR TEMPERATURES...THE GFS GUIDANCE IS WAY TO WARM...THE NAM IS TOO WARM AS WELL BUT NOT AS WRONG AS THE GFS. WITH NOTHING IN THE SYNOPTIC SCALE TO FLUSH THE COLD AIRMASS OUT...THE CURRENT UPSTREAM DATA LOOKS LIKE A GOOD FORECAST TOOL AS FAR AS BOTH SATURDAY AND SUNDAY HIGH TEMPERATURES ARE CONCERNED. SAME FOR MONDAY REALLY. CURRENT MIN/MAX TEMPERATURE GRIDS ARE FAIRLY GOOD...ONLY SLIGHT COOLING ADJUSTMENTS TO BE MADE. THE LATER DAYS...MONDAY THROUGH THURSDAY...MANY OF THE MODELS MOVE A TROUGH AXIS ACROSS THE FORECAST ARE SOMETIME MONDAY...THEN PINCH OFF AN UPPER LEVEL CIRCULATION OVER THE DESERT SOUTHWEST TUESDAY INTO WEDNESDAY. THE FLOW ALOFT IS NORTH-NORTHWESTERLY INTO WEDNESDAY BEFORE BECOMING MORE ZONAL. MOISTURE IS LACKING. WILL CHANGE LITTLE AND ADD A DRY...COOLER THAN NORMAL...SEVENTH DAY. && .BOU WATCHES/WARNINGS/ADVISORIES...NONE. && GARD/RJK
Hazardous weather outlook, Jan 11, 11:46 AM MST, 14 hours 24 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER CO 1146 AM MST THU JAN 11 2007 COZ030>051-121300- 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- 1146 AM MST THU JAN 11 2007 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT ON THE PLAINS...TEMPERATURES WILL CONTINUE TO FALL STEADILY THROUGH THE AFTERNOON AND EVENING BEHIND AN ARCTIC COLD FRONT. BESIDES THE INTRUSION OF BITTER COLD AIR...EXPECT AREAS OF FREEZING DRIZZLE AND FOG TO DEVELOP BY EARLY THIS EVENING ALONG WITH SOME LIGHT SNOW OR FLURRIES. BRIDGES...OVERPASSES AND OTHER OUTDOOR OBJECTS MAY BECOME ICE COVERED AND SLIPPERY OVERNIGHT. AREAS OF FOG MAY BECOME LOCALLY DENSE WITH VISIBILITIES AS LOW AS ONE QUARTER MILE AT TIMES BEFORE DAYBREAK FRIDAY MORNING. IN THE HIGH COUNTRY...MOIST SOUTHWESTERLY FLOW ALOFT WILL CONTINUE TO SPREAD SNOW INTO THE MOUNTAINS. THE SNOW WILL INCREASE TONIGHT WITH ACCUMULATIONS UP TO 4 INCHES MAINLY IN THE MOUNTAINS NORTH OF INTERSTATE 70. SOUTHWEST WINDS AT SUSTAINED SPEEDS OF 20 TO 35 MPH MPH WITH GUSTS AS HIGH AS 50 MPH WILL PRODUCE AREAS OF BLOWING SNOW AND DIFFICULT DRIVING CONDITIONS AT TIMES. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THE COLD AIR MASS IS EXPECTED TO CONTINUE OVER THE FORECAST AREA BELOW 9000 FEET INTO EARLY NEXT WEEK. HIGH TEMPERATURES WILL BE FROM 30 TO 40 DEGREES BELOW NORMAL WITH LOWS ABOUT 20 TO 30 DEGREES BELOW NORMAL. THIS COLD AIRMASS IS NOT VERY DEEP AND SHOULD NOT AFFECT THE HIGHER MOUNTAINS. LIGHT SNOW AND FLURRIES ARE EXPECTED WITH THIS COLD AIRMASS THROUGH SUNDAY...BUT ACCUMULATIONS WILL BE LIGHT FOR THE PLAINS AND FOOTHILLS. MORE SIGNIFICANT ACCUMULATIONS ARE EXPECTED IN THE MOUNTAINS OVER THE WEEKEND. THE COLD AIRMASS MAY BEGIN TO MODERATE EARLY TO MID NEXT WEEK. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. GARD/RJK
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 11, 10:12 PM MST | Winter Weather Advisory | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 7 more | 12 hr |
| Jan 12, 3:41 PM MST | Snow and Blowing Snow Advisory | BOU | Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more | 16 hr |
Nearby
Snow Advisories in Colorado, 2007Every snow advisory in 2007
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.