Alert archive / Colorado / Winter Storm Warnings in 2012
Winter Storm Warning 5, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this winter storm warning at Feb 29, 2012, 3:12 PM MST for Grand County, Jackson County, Colorado. It took effect at Mar 1, 2012, 12:00 AM MST. It was in force for 29 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Feb 29, 2012, 3:12 PM MST (22:12 UTC)
- In effect from
- Mar 1, 2012, 12:00 AM MST
- Expired
- Mar 2, 2012, 4:55 AM MST
- In force
- 29 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Grand County, CO, Jackson County, CO
The radar
The Cheyenne radar (KCYS), 147 km from the middle of the area, began a volume at 22:15 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
Grand Junction, CO (KGJT), launched 12:00Z, 10.2 hours before the alert went out and 239 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
- 1354 m above ground
- 0-6 km bulk shear
- 69 kt
- 0-1 km storm-relative helicity
- 147 m²/s²
- 0-3 km storm-relative helicity
- 247 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
763 WWUS45 KBOU 292212 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 312 PM MST WED FEB 29 2012 COZ031-010700- /O.UPG.KBOU.WW.Y.0011.120301T0700Z-120301T2300Z/ /O.NEW.KBOU.WS.W.0005.120301T0700Z-120302T1800Z/ 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 312 PM MST WED FEB 29 2012 ...WINTER STORM WARNING IN EFFECT FROM MIDNIGHT TONIGHT TO 11 AM MST FRIDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM WARNING FOR SNOW AND BLOWING SNOW...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 11 AM MST FRIDAY. THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. * TIMING...SNOW WILL DEVELOP THIS EVENING AND BECOME HEAVIER BY MIDNIGHT. THE HEAVIEST SNOW IS EXPECTED TO FALL LATE TONIGHT THROUGH THURSDAY...WHEN SNOWFALL RATES MAY APPROACH 1 INCH PER HOUR. SNOW WILL DECREASE LATE THURSDAY NIGHT INTO FRIDAY MORNING. * SNOW ACCUMULATIONS...STORM TOTALS OF 12 TO 18 INCHES. * WINDS/VISIBILITY...SOUTHWEST 10 TO 20 MPH WITH GUSTS TO 30 MPH. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING AND BLOWING SNOW ESPECIALLY OVER THE HIGHER PASSES. * IMPACTS...TRAVEL WILL BE HAZARDOUS DUE TO SNOWPACKED AND ICY ROADS...AND POOR VISIBILITIES LATE TONIGHT THROUGH THURSDAY NIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... TRAVEL WILL BE DANGEROUS AND IS DISCOURAGED DUE TO SNOW AND BLOWING SNOW CAUSING REDUCED VISIBILITIES. CONSIDER DELAYING TRAVEL UNTIL CONDITIONS IMPROVE. IF YOU MUST TRAVEL...KEEP EXTRA FOOD...WATER...A FLASHLIGHT...AND DRY CLOTHING IN YOUR VEHICLE. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE AND WAIT FOR HELP TO ARRIVE. && $$ COZ033-034-010700- /O.NEW.KBOU.WW.Y.0012.120301T0700Z-120302T1800Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK 312 PM MST WED FEB 29 2012 ...WINTER WEATHER ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 11 AM MST FRIDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW AND BLOWING SNOW...WHICH IS IN EFFECT FROM MIDNIGHT TONIGHT TO 11 AM MST FRIDAY. * TIMING...SNOW WILL DEVELOP AND SPREAD SOUTHWARD ACROSS THE FRONT RANGE MOUNTAINS TONIGHT. SNOW WILL THEN CONTINUE THROUGH THURSDAY NIGHT BEFORE DECREASING BY FRIDAY MORNING. * SNOW ACCUMULATIONS...STORM TOTALS OF 8 TO 15 INCHES. * WINDS/VISIBILITY...SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO 45 MPH ABOVE TIMBERLINE...TURNING TO THE NORTHWEST THURSDAY NIGHT. * IMPACTS...TRAVEL WILL BE HAZARDOUS DUE TO SNOWPACKED AND ICY ROADS...AND POOR VISIBILITIES LATE TONIGHT THROUGH FRIDAY MORNING. CHAIN LAWS WILL LIKELY BE IN EFFECT ALONG I-70 BETWEEN GEORGETOWN AND VAIL PASS. PRECAUTIONARY/PREPAREDNESS ACTIONS... ROADS WILL BECOME ICY AND SNOWPACKED WITH HAZARDOUS TRAVEL CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO THE SNOW AND BLOWING SNOW...ESPECIALLY OVER THE HIGHER MOUNTAIN PASSES. IF TRAVELING ALLOW EXTRA TIME TO REACH YOUR DESTINATION. && $$
6 follow-up statements
003 WWUS45 KBOU 010425 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 925 PM MST WED FEB 29 2012 ...MORE SNOW MOVING INTO THE NORTHERN MOUNTAINS OF COLORADO... .A POTENT WINTER STORM DEVELOPING OVER THE PACIFIC NORTHWEST WILL BE MOVING OVER COLORADO OVER THE NEXT FEW DAYS. MODERATE SNOWFALL IS EXPECTED TO SPREAD ACROSS THE NORTH CENTRAL COLORADO MOUNTAINS LATER TONIGHT AND CONTINUE THROUGH THURSDAY AND THURSDAY NIGHT. TRAVEL CONDITIONS COULD BE IMPACTED BY THE ACCUMULATING SNOWFALL OVER THE NEXT FEW DAYS. COZ031-011230- /O.CON.KBOU.WS.W.0005.120301T0700Z-120302T1800Z/ 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 925 PM MST WED FEB 29 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST FRIDAY... * TIMING...SNOW IS EXPECTED TO DEVELOP OVERNIGHT AND BECOME HEAVIER BY SUNRISE. THE HEAVIEST SNOW IS EXPECTED TO FALL LATE THURSDAY...WHEN SNOWFALL RATES MAY APPROACH 1 INCH PER HOUR. SNOW WILL DECREASE LATE THURSDAY NIGHT INTO FRIDAY MORNING. * SNOW ACCUMULATIONS...STORM TOTALS OF 12 TO 18 INCHES. * WINDS/VISIBILITY...SOUTHWEST 10 TO 20 MPH WITH GUSTS TO 30 MPH. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING AND BLOWING SNOW...ESPECIALLY OVER THE HIGHER PASSES. * IMPACTS...TRAVEL WILL BE HAZARDOUS DUE TO SNOWPACKED AND ICY ROADS...AND POOR VISIBILITIES LATE TONIGHT THROUGH THURSDAY NIGHT. PRECAUTIONARY/PREPAREDNESS ACTIONS... TRAVEL MAY BECOME DANGEROUS AND IS DISCOURAGED DUE TO SNOW AND BLOWING SNOW CAUSING REDUCED VISIBILITIES. IF YOU MUST TRAVEL...KEEP EXTRA FOOD...WATER...A FLASHLIGHT...AND DRY CLOTHING IN YOUR VEHICLE. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE AND WAIT FOR HELP TO ARRIVE. && $$ COZ033-034-011230- /O.CON.KBOU.WW.Y.0012.120301T0700Z-120302T1800Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK 925 PM MST WED FEB 29 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST FRIDAY... * TIMING...SNOW WILL DEVELOP AND SPREAD SOUTHWARD ACROSS THE FRONT RANGE MOUNTAINS OVERNIGHT. SNOW WILL THEN CONTINUE THROUGH THURSDAY NIGHT BEFORE DECREASING FRIDAY MORNING. * SNOW ACCUMULATIONS...STORM TOTALS OF 8 TO 14 INCHES. * WINDS/VISIBILITY...SOUTHWEST WINDS 15 TO 25 MPH WITH GUSTS TO 45 MPH ABOVE TIMBERLINE...TURNING TO THE NORTHWEST THURSDAY NIGHT. * IMPACTS...TRAVEL WILL BE HAZARDOUS DUE TO SNOWPACKED AND ICY ROADS...AND POOR VISIBILITIES LATE TONIGHT THROUGH FRIDAY MORNING. CHAIN LAWS WILL LIKELY BE IN EFFECT ALONG I-70 BETWEEN GEORGETOWN AND VAIL PASS. PRECAUTIONARY/PREPAREDNESS ACTIONS... ROADS WILL BECOME ICY AND SNOWPACKED WITH HAZARDOUS TRAVEL CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO THE SNOW AND BLOWING SNOW...ESPECIALLY OVER THE HIGHER MOUNTAIN PASSES. IF TRAVELING ALLOW EXTRA TIME TO REACH YOUR DESTINATION. && $$
552 WWUS45 KBOU 011220 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER/BOULDER CO 520 AM MST THU MAR 1 2012 ...MORE SNOW FOR THE NORTHERN MOUNTAINS OF COLORADO... .A WINTER STORM WILL MOVE ACROSS COLORADO TODAY INTO FRIDAY. A PROLONGED PERIOD OF MODERATE SNOWFALL IS EXPECTED...WITH OCCASIONAL HEAVY SNOW POSSIBLE. WINTER TRAVEL CONDITIONS CAN BE EXPECTED OVER THE HIGHER MOUNTAINS. COZ031-012200- /O.CON.KBOU.WS.W.0005.000000T0000Z-120302T1800Z/ 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 520 AM MST THU MAR 1 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST FRIDAY... * TIMING...SNOW WILL CONTINUE INTO FRIDAY. THE HEAVIEST SNOW IS EXPECTED TO FALL LATE THURSDAY...WHEN SNOWFALL RATES MAY APPROACH 1 INCH PER HOUR. * SNOW ACCUMULATIONS...STORM TOTALS OF 12 TO 18 INCHES. * WINDS/VISIBILITY...WEST 10 TO 20 MPH WITH GUSTS TO 30 MPH. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING AND BLOWING SNOW...ESPECIALLY OVER THE HIGHER PASSES. * IMPACTS...TRAVEL WILL BE HAZARDOUS DUE TO SNOWPACKED AND ICY ROADS...AND POOR VISIBILITIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... TRAVEL MAY BECOME DANGEROUS AND IS DISCOURAGED DUE TO SNOW AND BLOWING SNOW CAUSING REDUCED VISIBILITIES. IF YOU MUST TRAVEL... KEEP EXTRA FOOD...WATER...A FLASHLIGHT...AND DRY CLOTHING IN YOUR VEHICLE. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE AND WAIT FOR HELP TO ARRIVE. && $$ COZ033-034-012200- /O.CON.KBOU.WW.Y.0012.000000T0000Z-120302T1800Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK 520 AM MST THU MAR 1 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST FRIDAY... * TIMING...SNOW WILL CONTINUE THROUGH FRIDAY MORNING. THE SNOW MAY BE HEAVY AT TIMES MAINLY THIS EVENING. * SNOW ACCUMULATIONS...STORM TOTALS OF 8 TO 14 INCHES. * WINDS/VISIBILITY...WEST WINDS 15 TO 25 MPH WITH GUSTS TO 35 MPH BECOMING NORTHWEST. GUSTS AS HIGH AS 50 MPH ABOVE TIMBERLINE THIS MORNING. * IMPACTS...TRAVEL WILL BE HAZARDOUS DUE TO SNOWPACKED AND ICY ROADS...AND POOR VISIBILITIES. TRAVEL RESTRICTIONS ARE LIKELY OVER THE HIGHER PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... ROADS WILL BECOME ICY AND SNOWPACKED WITH HAZARDOUS TRAVEL CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO THE SNOW AND BLOWING SNOW...ESPECIALLY OVER THE HIGHER MOUNTAIN PASSES. IF TRAVELING ALLOW EXTRA TIME TO REACH YOUR DESTINATION. && $$ GIMMESTAD
455 WWUS45 KBOU 011723 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 1023 AM MST THU MAR 1 2012 ...SNOW FOR THE NORTHERN MOUNTAINS OF COLORADO AND FOR THE DENVER METRO AREA... .A WINTER STORM WILL MOVE ACROSS COLORADO TODAY AND INTO FRIDAY. A PROLONGED PERIOD OF MODERATE SNOWFALL IS EXPECTED...WITH OCCASIONAL HEAVY SNOW POSSIBLE OVER THE MOUNTAINS . WINTER TRAVEL CONDITIONS CAN BE EXPECTED OVER THE HIGHER MOUNTAINS. SNOW WILL MOVE OFF THE HIGHER TERRAIN AND ACROSS THE DENVER METRO AREA THIS AFTERNOON. AN UPSLOPE NORTHEASTERLY FLOW...INSTABILITY AND LIFT FROM AN UPPER LEVEL SYSTEM WILL HELP PRODUCE SNOW. A JET OVER COLORADO WILL COMBINE WITH THE INSTABILITY TO PRODUCE SOME HEAVY SNOW BANDS WHERE SNOWFALL RATES MAY APPROACH 2 INCHES PER HOUR. ROADS ARE EXPECTED TO BECOME SLIPPERY AND ICY LATE THIS AFTERNOON AND THIS EVENING...MAKING FOR A SLOW EVENING COMMUTE. COZ031-020300- /O.EXT.KBOU.WS.W.0005.000000T0000Z-120303T0000Z/ 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 1023 AM MST THU MAR 1 2012 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 5 PM MST FRIDAY... * TIMING...PERIODS OF SNOW WILL CONTINUE INTO FRIDAY. THE HEAVIEST SNOW IS EXPECTED TO FALL TODAY...WHEN SNOWFALL RATES MAY APPROACH 1 INCH PER HOUR. ANOTHER ROUND OF MODERATE SNOW WILL BE POSSIBLE FRIDAY. * SNOW ACCUMULATIONS...STORM TOTALS OF 12 TO 18 INCHES. * WINDS/VISIBILITY...WEST 10 TO 20 MPH WITH GUSTS TO 30 MPH. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING AND BLOWING SNOW...ESPECIALLY OVER THE HIGHER PASSES. * IMPACTS...TRAVEL WILL BE HAZARDOUS DUE TO SNOWPACKED AND ICY ROADS...AND POOR VISIBILITIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... TRAVEL MAY BECOME DANGEROUS AND IS DISCOURAGED DUE TO SNOW AND BLOWING SNOW CAUSING REDUCED VISIBILITIES. IF YOU MUST TRAVEL... KEEP EXTRA FOOD...WATER...A FLASHLIGHT...AND DRY CLOTHING IN YOUR VEHICLE. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE AND WAIT FOR HELP TO ARRIVE. && $$ COZ036-041-020300- /O.EXB.KBOU.WW.Y.0012.120301T2000Z-120303T0000Z/ JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- INCLUDING THE CITIES OF...BAILEY...CENTRAL CITY...EVERGREEN... GEORGETOWN...IDAHO SPRINGS...WESTCREEK...CASTLE ROCK...ELBERT... KIOWA...LARKSPUR...SIMLA 1023 AM MST THU MAR 1 2012 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST FRIDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL 5 PM MST FRIDAY. * TIMING...SNOW WILL DEVELOP ACROSS THE FOOTHILLS AND DENVER METRO AREA THIS AFTERNOON AND CONTINUE INTO THIS EVENING. SNOW WILL TAPER OFF LATE TONIGHT BUT REDEVELOP OVER THE SOUTHERN FOOTHILLS AND PALMER DIVIDE FRIDAY. * SNOW ACCUMULATIONS...1 TO 4 INCHES OF SNOW ARE EXPECTED THROUGH THIS EVENING. ANOTHER 2 TO 5 INCHES ARE EXPECTED FRIDAY FOR A STORM TOTALS OF 3 TO 9 INCHES. HEAVIER SNOW BANDS WILL DEVELOP AND WILL LOCALLY PRODUCE SNOWFALL RATES OF 2 INCHES PER HOUR. * IMPACTS...COMMUTERS SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION LATE THIS AFTERNOON AND THIS EVENING. ROADS WILL BECOME SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. PRECAUTIONARY/PREPAREDNESS ACTIONS... ROADS WILL BECOME ICY AND SNOWPACKED WITH HAZARDOUS TRAVEL CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO THE SNOW. IF TRAVELING ALLOW EXTRA TIME TO REACH YOUR DESTINATION. && $$ COZ039-040-020300- /O.EXB.KBOU.WW.Y.0012.120301T2000Z-120302T0700Z/ 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- INCLUDING THE CITIES OF...ARVADA...BOULDER...GOLDEN...LAKEWOOD... LONGMONT...AURORA...BRIGHTON...CITY OF DENVER... DENVER INTERNATIONAL AIRPORT...HIGHLANDS RANCH...LITTLETON... PARKER 1023 AM MST THU MAR 1 2012 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL MIDNIGHT MST TONIGHT... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL MIDNIGHT MST TONIGHT. * TIMING...SNOW WILL DEVELOP ACROSS THE DENVER METRO AREA THIS AFTERNOON AND CONTINUE INTO THIS EVENING. * SNOW ACCUMULATIONS...STORM TOTALS OF 1 TO 4 INCHES ARE EXPECTED WITH UP TO 6 INCHES POSSIBLE UNDER HEAVIER SNOW BANDS * IMPACTS...COMMUTERS SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION LATE THIS AFTERNOON AND THIS EVENING. ROADS WILL BECOME SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. PRECAUTIONARY/PREPAREDNESS ACTIONS... ROADS WILL BECOME ICY AND SNOWPACKED WITH HAZARDOUS TRAVEL CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO THE SNOW. IF TRAVELING ALLOW EXTRA TIME TO REACH YOUR DESTINATION. && $$ COZ033-034-020300- /O.EXT.KBOU.WW.Y.0012.000000T0000Z-120303T0000Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK 1023 AM MST THU MAR 1 2012 ...WINTER WEATHER ADVISORY NOW IN EFFECT UNTIL 5 PM MST FRIDAY... * TIMING...PERIOD OF SNOW WILL CONTINUE THROUGH FRIDAY. THE SNOW MAY BE HEAVY AT TIMES THROUGH THIS EVENING. * SNOW ACCUMULATIONS...STORM TOTALS OF 8 TO 14 INCHES. * WINDS/VISIBILITY...WEST WINDS 15 TO 25 MPH WITH GUSTS TO 35 MPH BECOMING NORTHWEST. GUSTS AS HIGH AS 50 MPH ABOVE TIMBERLINE THIS MORNING. * IMPACTS...TRAVEL WILL BE HAZARDOUS DUE TO SNOWPACKED AND ICY ROADS...AND POOR VISIBILITIES. TRAVEL RESTRICTIONS ARE LIKELY OVER THE HIGHER PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... ROADS WILL BECOME ICY AND SNOWPACKED WITH HAZARDOUS TRAVEL CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO THE SNOW AND BLOWING SNOW...ESPECIALLY OVER THE HIGHER MOUNTAIN PASSES. IF TRAVELING ALLOW EXTRA TIME TO REACH YOUR DESTINATION. && $$
910 WWUS45 KBOU 012350 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 450 PM MST THU MAR 1 2012 ...AREA OF SNOW WILL CONTINUE THROUGH FRIDAY MORNING... .AN UPPER LEVEL STORM SYSTEM WILL MOVE ACROSS COLORADO TONIGHT AND FRIDAY. THE FIRST WAVE OF MOISTURE AND INSTABILITY HAS WEAKENED...WITH GENERALLY LIGHT SNOW SHOWERS ACROSS THE FRONT RANGE URBAN AREAS THIS EVENING. ANOTHER ROUND OF STEADIER SNOWFALL MAY DEVELOP IN THE PRE-DAWN HOURS FRIDAY BEHIND ANOTHER COLD FRONT. THIS SNOW SHOULD GRADUALLY DECREASE FRIDAY AFTERNOON. IN THE MOUNTAINS...THE HEAVIEST SNOWFALL OCCURRED LATE LAST NIGHT INTO THIS MORNING. WHILE THE SNOW HAS DECREASED...ADDITIONAL SNOW SHOWERS WILL CONTINUE IN THE HIGH COUNTRY TONIGHT AND FRIDAY. COZ039-040-020100- /O.CAN.KBOU.WW.Y.0012.000000T0000Z-120302T0700Z/ 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- INCLUDING THE CITIES OF...ARVADA...BOULDER...GOLDEN...LAKEWOOD... LONGMONT...AURORA...BRIGHTON...CITY OF DENVER... DENVER INTERNATIONAL AIRPORT...HIGHLANDS RANCH...LITTLETON... PARKER 450 PM MST THU MAR 1 2012 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE WINTER WEATHER ADVISORY. GENERALLY LIGHT SNOW SHOWERS WILL OCCUR THIS EVENING WITH NO SIGNIFICANT TRAVEL IMPACTS EXPECTED. $$ COZ031-020800- /O.CON.KBOU.WS.W.0005.000000T0000Z-120303T0000Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS 450 PM MST THU MAR 1 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST FRIDAY... * TIMING...PERIODS OF SNOW WILL CONTINUE INTO FRIDAY...GRADUALLY DECREASING IN THE AFTERNOON. * SNOW ACCUMULATIONS...STORM TOTALS OF 12 TO 18 INCHES. * WINDS/VISIBILITY...WEST 10 TO 20 MPH WITH GUSTS TO 30 MPH. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING AND BLOWING SNOW...ESPECIALLY OVER THE HIGHER PASSES. * IMPACTS...TRAVEL WILL BE HAZARDOUS DUE TO SNOWPACKED AND ICY ROADS...AND POOR VISIBILITIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... TRAVEL MAY BECOME DANGEROUS AND IS DISCOURAGED DUE TO SNOW AND BLOWING SNOW CAUSING REDUCED VISIBILITIES. IF YOU MUST TRAVEL... KEEP EXTRA FOOD...WATER...A FLASHLIGHT...AND DRY CLOTHING IN YOUR VEHICLE. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE AND WAIT FOR HELP TO ARRIVE. $$ COZ033-034-020800- /O.CON.KBOU.WW.Y.0012.000000T0000Z-120303T0000Z/ 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 450 PM MST THU MAR 1 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST FRIDAY... * TIMING...PERIOD OF SNOW WILL CONTINUE THROUGH FRIDAY...GRADUALLY DECREASING IN THE AFTERNOON. * SNOW ACCUMULATIONS...STORM TOTALS OF 8 TO 14 INCHES. * WINDS/VISIBILITY...WEST WINDS 15 TO 25 MPH WITH GUSTS TO 35 MPH BECOMING NORTHWEST. * IMPACTS...TRAVEL WILL BE HAZARDOUS DUE TO SNOWPACKED AND ICY ROADS...AND POOR VISIBILITIES. TRAVEL RESTRICTIONS ARE LIKELY OVER THE HIGHER PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... ROADS WILL BECOME ICY AND SNOWPACKED WITH HAZARDOUS TRAVEL CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO THE SNOW AND BLOWING SNOW...ESPECIALLY OVER THE HIGHER MOUNTAIN PASSES. IF TRAVELING ALLOW EXTRA TIME TO REACH YOUR DESTINATION. && $$ COZ036-041-020800- /O.CON.KBOU.WW.Y.0012.000000T0000Z-120303T0000Z/ JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- INCLUDING THE CITIES OF...BAILEY...CENTRAL CITY...EVERGREEN... GEORGETOWN...IDAHO SPRINGS...WESTCREEK...CASTLE ROCK...ELBERT... KIOWA...LARKSPUR...SIMLA 450 PM MST THU MAR 1 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST FRIDAY... * TIMING...SNOW SHOWERS WILL OCCUR THIS EVENING. AFTER DECREASING LATE THIS EVENING INTO THE EARLY MORNING HOURS...ANOTHER ROUND OF SNOW IS EXPECTED TO DEVELOP BY DAYBREAK FRIDAY AND CONTINUE INTO FRIDAY AFTERNOON. * SNOW ACCUMULATIONS...1 TO 3 INCHES OF SNOW ARE EXPECTED THROUGH THIS EVENING. ANOTHER 2 TO 5 INCHES ARE EXPECTED FRIDAY FOR A STORM TOTALS OF 3 TO 8 INCHES. SNOW MAY BE BRIEFLY HEAVY WITH SNOWFALL RATES AROUND 1 INCH PER HOUR. * IMPACTS...COMMUTERS SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION. ROADS WILL BECOME SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. PRECAUTIONARY/PREPAREDNESS ACTIONS... ROADS WILL BECOME ICY AND SNOWPACKED WITH HAZARDOUS TRAVEL CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO THE SNOW. IF TRAVELING ALLOW EXTRA TIME TO REACH YOUR DESTINATION. && $$
479 WWUS45 KBOU 020354 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 854 PM MST THU MAR 1 2012 ...AREAS OF SNOW WILL CONTINUE THROUGH FRIDAY MORNING... .AN UPPER LEVEL STORM SYSTEM WILL MOVE ACROSS COLORADO TONIGHT AND FRIDAY. THE FIRST WAVE OF MOISTURE AND INSTABILITY HAS WEAKENED...WITH GENERALLY LIGHT SNOW SHOWERS ACROSS THE FRONT RANGE URBAN AREAS THIS EVENING. ANOTHER ROUND OF STEADIER SNOWFALL MAY DEVELOP IN THE PRE-DAWN HOURS FRIDAY BEHIND ANOTHER COLD FRONT. THIS SNOW SHOULD GRADUALLY DECREASE LATE FRIDAY AFTERNOON. IN THE MOUNTAINS...THE HEAVIEST SNOWFALL OCCURRED LATE LAST NIGHT INTO THIS MORNING. WHILE THE SNOW HAS DECREASED...ADDITIONAL SNOW SHOWERS WILL CONTINUE IN THE HIGH COUNTRY TONIGHT AND FRIDAY. ACCUMULATIONS IN THE HIGH COUNTRY HAVE SO FAR RANGED BETWEEN 2 AND 6 INCHES. COZ031-021300- /O.CON.KBOU.WS.W.0005.000000T0000Z-120303T0000Z/ 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 854 PM MST THU MAR 1 2012 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST FRIDAY... * TIMING...PERIODS OF SNOW WILL CONTINUE INTO FRIDAY...GRADUALLY DECREASING IN THE AFTERNOON. * SNOW ACCUMULATIONS...STORM TOTALS OF 10 TO 16 INCHES. * WINDS/VISIBILITY...WEST 10 TO 20 MPH WITH GUSTS TO 30 MPH. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO FALLING AND BLOWING SNOW...ESPECIALLY OVER THE HIGHER PASSES. * IMPACTS...TRAVEL WILL BE HAZARDOUS DUE TO SNOWPACKED AND ICY ROADS...AND POOR VISIBILITIES. PRECAUTIONARY/PREPAREDNESS ACTIONS... TRAVEL MAY BECOME DANGEROUS AND IS DISCOURAGED DUE TO SNOW AND BLOWING SNOW CAUSING REDUCED VISIBILITIES. IF YOU MUST TRAVEL... KEEP EXTRA FOOD...WATER...A FLASHLIGHT...AND DRY CLOTHING IN YOUR VEHICLE. IF YOU GET STRANDED...STAY WITH YOUR VEHICLE AND WAIT FOR HELP TO ARRIVE. $$ COZ033-034-021300- /O.CON.KBOU.WW.Y.0012.000000T0000Z-120303T0000Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK 854 PM MST THU MAR 1 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST FRIDAY... * TIMING...PERIOD OF SNOW WILL CONTINUE THROUGH FRIDAY... GRADUALLY DECREASING IN THE AFTERNOON. * SNOW ACCUMULATIONS...STORM TOTALS OF 6 TO 12 INCHES. * WINDS/VISIBILITY...WEST WINDS 15 TO 25 MPH WITH GUSTS TO 35 MPH BECOMING NORTHWEST. * IMPACTS...TRAVEL WILL BE HAZARDOUS DUE TO SNOWPACKED AND ICY ROADS...AND POOR VISIBILITIES. TRAVEL RESTRICTIONS ARE LIKELY OVER THE HIGHER PASSES. PRECAUTIONARY/PREPAREDNESS ACTIONS... ROADS WILL BECOME ICY AND SNOWPACKED WITH HAZARDOUS TRAVEL CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO THE SNOW AND BLOWING SNOW...ESPECIALLY OVER THE HIGHER MOUNTAIN PASSES. IF TRAVELING ALLOW EXTRA TIME TO REACH YOUR DESTINATION. && $$ COZ036-041-021300- /O.CON.KBOU.WW.Y.0012.000000T0000Z-120303T0000Z/ JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 FEET- INCLUDING THE CITIES OF...BAILEY...CENTRAL CITY...EVERGREEN... GEORGETOWN...IDAHO SPRINGS...WESTCREEK...CASTLE ROCK...ELBERT... KIOWA...LARKSPUR...SIMLA 854 PM MST THU MAR 1 2012 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST FRIDAY... * TIMING...SNOW SHOWERS WILL GRADUALLY DECREASE DURING THE OVERNIGHT HOURS. HOWEVER...ANOTHER ROUND OF SNOW IS EXPECTED TO DEVELOP BY EARLY FRIDAY MORNING AND CONTINUE INTO FRIDAY AFTERNOON. * SNOW ACCUMULATIONS...1 TO 2 INCHES OF SNOW WILL BE POSSIBLE OVERNIGHT. ANOTHER 2 TO 5 INCHES IS EXPECTED FRIDAY BRINGING STORM TOTALS INTO THE 4 TO 9 INCH RANGE. SNOW MAY BE BRIEFLY HEAVY ON FRIDAY WITH SNOWFALL RATES AROUND 1 INCH PER HOUR. * IMPACTS...COMMUTERS SHOULD ALLOW EXTRA TIME TO REACH YOUR DESTINATION. ROADS WILL BECOME SNOW COVERED AND SLIPPERY. WHEN DRIVING SLOW DOWN AND LEAVE ENOUGH ROOM BETWEEN YOU AND THE VEHICLE IN FRONT OF YOU. PRECAUTIONARY/PREPAREDNESS ACTIONS... ROADS WILL BECOME ICY AND SNOWPACKED WITH HAZARDOUS TRAVEL CONDITIONS. VISIBILITIES WILL BE REDUCED AT TIMES DUE TO THE SNOW. IF TRAVELING ALLOW EXTRA TIME TO REACH YOUR DESTINATION. && $$ BARJENBRUCH
294 WWUS45 KBOU 021155 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER CO 455 AM MST FRI MAR 2 2012 COZ031-021300- /O.CAN.KBOU.WS.W.0005.000000T0000Z-120303T0000Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS 455 AM MST FRI MAR 2 2012 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE WINTER STORM WARNING. SNOW SHOWERS WILL CONTINUE TODAY...BUT ACCUMULATIONS ARE EXPECTED TO BE LIGHT...IN THE 2 TO 4 INCH RANGE. $$ COZ033-034-036-041-021300- /O.CAN.KBOU.WW.Y.0012.000000T0000Z-120303T0000Z/ 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- JEFFERSON AND WEST DOUGLAS COUNTIES ABOVE 6000 FEET/GILPIN/CLEAR CREEK/NORTHEAST PARK COUNTIES BELOW 9000 FEET- ELBERT/CENTRAL AND EAST DOUGLAS COUNTIES ABOVE 6000 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...BAILEY...CENTRAL CITY... EVERGREEN...GEORGETOWN...IDAHO SPRINGS...WESTCREEK... CASTLE ROCK...ELBERT...KIOWA...LARKSPUR...SIMLA 455 AM MST FRI MAR 2 2012 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE WINTER WEATHER ADVISORY. OCCASIONAL SNOW SHOWERS ARE EXPECTED TODAY...BUT ACCUMULATIONS WILL GENERALLY BE LIGHT...IN THE 1 TO 4 INCH RANGE OVER THE MOUNTAINS AND ONLY AN INCH OR TWO IN THE LOWER ELEVATIONS OF DOUGLAS AND WESTERN ELBERT COUNTIES. $$ GIMMESTAD
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 Feb 29, 8:10 AM MST, 7 hours 2 minutes earlier.
Area forecast discussion, Feb 29, 8:10 AM MST, 7 hours 2 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER/BOULDER CO 810 AM MST WED FEB 29 2012 .AVIATION...HAVING A HARD TIME SEEING THE LONGMONT ANTICYCLONE DEVELOP TODAY TO BRING THE EASTERLY COMPONENT TO KDEN. BELIEVE WLY TO SWLY WINDS WILL DOMINATE TODAY. HAVE UPDATED THE TAF TO REFLECT THIS. VFR CONDITIONS EXPECTED THROUGH THURSDAY MORNING WITH A FRONTAL PASSAGE POSSIBLE BEFORE 18Z THURSDAY. && .PREV DISCUSSION... /ISSUED 349 AM MST WED FEB 29 2012/ SHORT TERM...STG UPPER LEVEL LOW WILL MOVE INTO THE GREAT LAKES REGION BY LATE AFTN AS ANOTHER UPPER LEVEL TROUGH BEGINS TO APPROACH FM THE WEST. THRU THE MORNING HOURS THERE COULD STILL BE SOME LOCALLY HIGH WINDS OVER THE HIGHER TERRAIN MAINLY THRU 15Z WHEN BEST WAVE ENHANCEMENT OCCURS HOWEVER SO FAR WIND GUSTS HAVE ONLY BEEN IN THE 50-60 MPH RANGE IN THE MTNS AND FOOTHILLS. ANOTHER POSSIBLE AREA FOR LOCALLY HIGH WINDS WOULD BE OVER THE FAR NERN CORNER IN LOGAN...PHILLIPS AND SEDGWICK COUNTIES FM 15Z-18Z WHERE BNDRY LAYER SPEEDS REACH 50 KTS FOR A FEW HOURS SO COULD SEE A FEW GUSTS IN THE 55-60 MPH RANGE FOR AN HOUR OR TWO. AS FAR AS PCPN MOISTURE WILL GRADUALLY DECREASE IN THE MTNS THIS MORNING SO WILL ONLY MENTION A SLIGHT CHANCE OF -SHSN WITH AREAS OF BLOWING SNOW. BY THIS AFTN THE FLOW ALOFT WILL BECOME MORE SWLY WITH SOME MID AN HIGH LEVEL CLOUDS SPREADING OVER THE AREA WITH A SLIGHT CHC OF -SHSN MAINLY OVER ZN 31. HIGHS THIS AFTN BASED ON CURRENT 850-700 MB TEMPS LOOK TO BE MAINLY IN THE UPPER 40S TO MID 50S OVER NERN CO. BY TONIGHT DEEPER MOISTURE WILL MOVE INTO THE MTNS AS LAPSE RATES INCREASE TO AROUND 7 C/KM AFTER MIDNIGHT. THE 700 MB FLOW WILL REMAIN SWLY SO BEST CHC OF SNOW WILL BE OVER ZNS 31 AND 33 ESPECIALLY AFTER MIDNIGHT. GUSTY WSW WINDS WILL ALSO DEVELOP OVER THE HIGHER TERRAIN AS WELL BUT SPEEDS SHOULD STAY BLO HI WND CRITERIA. LONG TERM...MODELS HAVE WEST-SOUTHWESTERLY FLOW DECREASING A BIT ON THURSDAY AS AN UPPER TROUGH MOVES IN. ZONAL FLOW ALOFT IN THE 50 TO 70 KNOT RANGE IS PROGGED FOR THURSDAY NIGHT. THE UPPER TROUGH AXIS MOVES ACROSS THE CWA ON FRIDAY. NORTH-NORTHWESTERLY FLOW ALOFT INCREASES FRIDAY NIGHT. A JET MAXIMUM GETS INTO THE WESTERN CWA BY 12Z SATURDAY MORNING. THERE IS UPWARD QG VERTICAL VELOCITY PROGGED OVER THE CWA THURSDAY...THURSDAY NIGHT....INTO FRIDAY MORNING. IT IS MODERATELY STRONG THURSDAY AFTERNOON AND EVENING. NOW THE BEST UPWARD MOTION WITH THIS UPPER TROUGH IS PROGGED SOUTH OF THE CWA. DOWNWARD MOTION IS PROGGED FRIDAY AFTERNOON AND FRIDAY NIGHT. THE LOW LEVEL PRESSURE AND WIND FIELDS SHOW A SURFACE CYCLONE DEVELOP OVER THE SOUTHEASTERN CORNER OF COLORADO BY THURSDAY AFTERNOON. THE UPSLOPE OVER THE PLAINS IS FAIR ON THURSDAY AND THURSDAY EVENING AS A RESULT. A SURGE OF COOLER AIR IS PROGGED TO MOVE INTO THE CWA FROM THURSDAY AFTERNOON INTO FRIDAY MORNING. AFTER MIDNIGHT THURSDAY NIGHT...THE BOUNDARY LAYER FLOW IS PROGGED TO BE NORTHWESTERLY. THIS CONTINUES ALL DAY FRIDAY. FRIDAY NIGHT...THE LOW LEVEL WINDS ARE WEST-NORTHWESTERLY. THEY ARE STRONGEST OUT OVER THE NORTHEAST CORNER. FOR MOISTURE...IT IS PRETTY DEEP OVER THE MOUNTAINS THURSDAY AND THURSDAY EVENING. FOR THE PLAINS...MODELS SHOW A PRETTY DRY THURSDAY. MOISTURE LOOKS PRETTY GOOD OVER THE EASTERN 2/3RDS OF THE PLAINS THURSDAY EVENING ON THE NAM...WITH LESS IT THOSE SAME LOCATIONS ON THE GFS. AFTER MIDNIGHT THURSDAY NIGHT ..THE MOUNTAINS AND PLAINS HAVE VERY LIMITED MOISTURE PROGGED. THERE IS LIMITED MOISTURE OVER THE MOUNTAINS ON FRIDAY IN THE NORTHWESTERLY FLOW. THERE IS SOME IN THE MID AND UPPER LEVELS OF THE PLAINS FRIDAY. A BIT OF MOISTURE LINGERS OVER THE MOUNTAINS FRIDAY NIGHT...THE PLAINS ARE DRY. THE QPF FIELDS HAVE FAIRLY DECENT AMOUNTS OF MEASURABLE SNOWFALL FOR THE MOUNTAINS ON THURSDAY ..LESS THURSDAY NIGHT. AGAIN...ONLY A TAD ON FRIDAY AND FRIDAY NIGHT. THE PLAINS ARE MAINLY DRY THURSDAY...JUST OF A TAD OF MEASURABLE PRECIPITATION PROGGED OVER THE WESTERN HALF THURSDAY AFTERNOON. THERE IS A TAD OVER THE PLAINS THURSDAY NIGHT...MAYBE OVER ABOUT 60% OF THE AREA. THERE IS A TAD OVER THE PALMER RIDGE ON FRIDAY. THE PLAINS ARE DRY FRIDAY NIGHT. SO FOR POPS IN THE MOUNTAINS...70-90%S LOOK GOOD FROM 12Z THURSDAY TO 06Z FRIDAY. AT FIRST OROGRAPHICS ARE NOT GREAT...BUT GET BETTER THURSDAY AFTERNOON. A BIT OF COLD AIR ADVECTION MOVES IN BY AFTERNOON AS WELL...WITH FAIRLY STEEP LAPSE RATES PROGGED. THE SNOW MODEL YIELDS AMOUNTS UP TO 7 INCHES FROM 18Z THURSDAY TO 06Z FRIDAY IN ZONES 31...33...AND 34. WILL SLOWLY DECREASE POPS FROM MIDNIGHT THURSDAY NIGHT THROUGH FRIDAY. PROGGED MOISTURE IS PRETTY MEAGER. FOR THE PLAINS...WILL GO WITH 20-30%S THURSDAY AFTERNOON AND NIGHT. THAT COULD BE A STRETCH WITH HOW POOR THE MOISTURE AND UPSLOPE NOW LOOK. THERE IS NOT A DECENT COLD FRONT AND A JET MAXIMUM IS LOCATED WELL TO OUR SOUTH. THE ONLY HOPE IS THE SYNOPTIC SCALE ENERGY. OVERALL THIS SET OF 00Z MODEL RUNS CONFUSED THINGS SOMEWHAT. THE SYNOPTIC SCALE ENERGY HAS DECREASED AND IS SOMEWHAT CONVOLUTED. THE MOISTURE ON THE MODELS IS ALSO CONFUSING AS THERE IS LESS NOW...ESPECIALLY FROM MIDNIGHT THURSDAY NIGHT ONWARD. NO HIGHLIGHTS FOR THE MOUNTAINS ..MAYBE ADVISORY AMOUNTS WILL FALL...BUT NOT EVEN SURE OF THAT NOW. FOR TEMPERATURES...THURSDAY HIGHS LOOK TO BE 2-5 C COLDER THAN TODAY'S HIGHS. FRIDAY'S HIGHS ARE ANOTHER 2-5 C COLDER THAN THURSDAY'S. FOR THE LATER DAYS...SATURDAY THROUGH TUESDAY...STRONG NORTH-NORTHWESTERLY FLOW ALOFT IS PROGGED SATURDAY. THEN UPPER RIDGING IS PROGGED SUNDAY AND MONDAY. ON TUESDAY...ZONAL FLOW ALOFT INCREASES AS WEAK UPPER TROUGHING DEVELOPS TO THE WEST. THE GFS AND ECMWF DIFFER ON THE TIMING OF THIS NEXT UPPER TROUGH. THE ECMWF IS SOMEWHAT FASTER. MODELS HAVE SOME MOISTURE FOR THE MOUNTAINS IN NORTHWESTERLY FLOW ON SATURDAY. SUNDAY THROUGH TUESDAY ARE MOISTURE POOR. SATURDAY'S TEMPERATURES ARE STILL COOL...BUT SUNDAY THROUGH TUESDAY WARM UP. AVIATION...WINDS OVERNIGHT HAVE BEEN GUSTY FM THE WEST HOWEVER THEY SHOULD GRADUALLY BECOME MORE NWLY THRU 12Z AND THEN GRADUALLY DECREASE. WITH NWLY WINDS COMING OFF THE CHEYENNE RIDGE LOOKS LIKE A LONGMONT ANTICYCLONE MAY DVLP BY MID TO LATE MORNING WITH WINDS BECOMING LIGHT ESE THRU MIDDAY AND REMAIN SO THRU THE AFTN. BY EARLY EVENING WINDS SHOULD GRADUALLY BECOME MORE SLY AND STAY THAT WAY OVERNIGHT. && .BOU WATCHES/WARNINGS/ADVISORIES... NONE. && SHORT TERM...RPK LONG TERM....RJK AVIATION...KRIEDERMAN
Hazardous weather outlook, Feb 29, 10:56 AM MST, 4 hours 16 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER/BOULDER CO 1056 AM MST WED FEB 29 2012 COZ030>051-011800- 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- 1056 AM MST WED FEB 29 2012 ...WINTER WEATHER ADVISORY FOR THE MOUNTAINS OF WESTERN JACKSON AND WESTERN GRAND COUNTIES FROM MIDNIGHT TONIGHT THROUGH 4 PM MST THURSDAY... THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT WESTERLY WINDS OVER THE MOUNTAINS AND FOOTHILLS ARE DECREASING...HOWEVER GUSTS TO 50 MPH WILL STILL BE POSSIBLE THROUGH THE EARLY AFTERNOON. OVER THE NORTHEAST PLAINS WINDS MAY GUST UP TO 50 MPH AT TIMES NEAR THE COLORADO...NEBRASKA BORDER BEFORE DECREASING BY MIDDAY. TONIGHT SNOW WILL INCREASE IN THE MOUNTAINS MAINLY AFTER MIDNIGHT WITH ACCUMULATIONS OF 2 TO 4 INCHES MAINLY NORTH OF I-70 BY THURSDAY MORNING. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY SNOWFALL IS EXPECTED TO INCREASE IN THE MOUNTAINS OF NORTHERN COLORADO ON THURSDAY AND POSSIBLY SPREAD TO THE NORTHEAST PLAINS OF COLORADO THURSDAY AFTERNOON FOLLOWING THE PASSAGE OF A COLD FRONT. OVERNIGHT THURSDAY...LOWER ELEVATIONS COULD SEE ACCUMULATING SNOWFALL WITH MOIST UPSLOPE FLOW AND THE PASSAGE OF THE UPPER LEVEL LOW PRESSURE TROUGH. ACCUMULATIONS IN THE MOUNTAINS BY DAWN FRIDAY COULD RANGE FROM 6 TO 12 INCHES WITH HIGHER AMOUNTS POSSIBLE ON NORTH AND WEST FACING SLOPES. SNOW AMOUNTS ON THE PLAINS ARE LESS CERTAIN...BUT IT IS NOT OUT OF THE QUESTION THAT SOME AREAS COULD SEE 1 TO 3 INCHES OF SNOW BY FRIDAY MORNING. SNOW CHANCES WILL CONTINUE IN THE MOUNTAINS FRIDAY AND FRIDAY NIGHT...AND POSSIBLY INTO SATURDAY. SUNDAY THROUGH TUESDAY LOOKS DRY AND WARMER FOR THE ENTIRE OUTLOOK AREA. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT.
In the hours before
Local storm report, Feb 29, 11:26 AM MST, 3 hours 46 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE DENVER CO
1126 AM MST WED FEB 29 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0510 AM NON-TSTM WND GST 3 SW ROCKY FLATS 39.86N 105.24W
02/29/2012 M75.00 MPH JEFFERSON CO MESONET
0429 AM NON-TSTM WND GST 3 SE PINECLIFFE 39.90N 105.40W
02/29/2012 M70.00 MPH GILPIN CO MESONET
0425 AM NON-TSTM WND GST 2 WNW ROCKY FLATS 39.90N 105.24W
02/29/2012 M74.00 MPH JEFFERSON CO MESONET
0425 AM NON-TSTM WND GST 3 SW ROCKY FLATS 39.86N 105.24W
02/29/2012 M71.00 MPH JEFFERSON CO MESONET
0406 AM NON-TSTM WND GST 3 SE JAMESTOWN 40.09N 105.35W
02/29/2012 M74.00 MPH BOULDER CO MESONET
0345 AM NON-TSTM WND GST 3 S MARSHALL 39.91N 105.23W
02/29/2012 M84.00 MPH JEFFERSON CO MESONET
NWTC
0345 AM NON-TSTM WND GST 3 SSW BOULDER 39.99N 105.27W
02/29/2012 M77.00 MPH BOULDER CO MESONET
NCAR
0328 AM NON-TSTM WND GST 2 SSW CRESCENT VILLAGE 39.90N 105.34W
02/29/2012 M70.00 MPH JEFFERSON CO MESONET
&&
KBOWENThe office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 29, 4:01 AM MST | Winter Weather Advisory | BOU | Grand, Jackson | 11 hr |
| Feb 29, 3:12 PM MST | Winter Weather Advisory | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 9 more | 38 hr |
Nearby
Winter Storm Warnings in Colorado, 2012Every winter storm warning 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.