Alert archive / Colorado / Winter Storm Warnings in 2015
Winter Storm Warning 16, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this winter storm warning at Dec 11, 2015, 3:28 AM MST for Grand County, Jackson County, Colorado. It took effect at Dec 11, 2015, 6:34 AM MST. It was in force for 28 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
- Dec 11, 2015, 3:28 AM MST (10:28 UTC)
- In effect from
- Dec 11, 2015, 6:34 AM MST
- Expired
- Dec 12, 2015, 10:49 AM MST
- In force
- 28 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 10:32 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 00:00Z, 10.5 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
- 1791 m above ground
- 0-6 km bulk shear
- 89 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 483 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
786 WWUS45 KBOU 111028 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER/BOULDER CO 328 AM MST FRI DEC 11 2015 ...WINTER STORM SYSTEM HEADING TOWARDS COLORADO... A STORM SYSTEM WILL MOVE INTO WESTERN COLORADO TODAY...THEN MAKE ITS WAY ACROSS THE REST OF THIS STATE TONIGHT AND SATURDAY. SNOW WILL DEVELOP IN THE MOUNTAINS TODAY...HEAVIEST IN THE PARK RANGE IN WESTERN JACKSON COUNTY. THE SNOW WILL INCREASE IN COVERAGE AND INTENSITY ALONG THE FRONT RANGE MOUNTAINS AND FOOTHILLS TONIGHT AND SATURDAY...WITH THE HEAVIEST AMOUNTS POSSIBLE NORTH OF INTERSTATE 70. COZ031-111830- /O.UPG.KBOU.WS.A.0012.151212T0100Z-151213T0100Z/ /O.NEW.KBOU.WS.W.0016.151211T1900Z-151213T0000Z/ 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 328 AM MST FRI DEC 11 2015 ...WINTER STORM WARNING IN EFFECT FROM NOON TODAY TO 5 PM MST SATURDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER STORM WARNING FOR SNOW AND BLOWING SNOW...WHICH IS IN EFFECT FROM NOON TODAY TO 5 PM MST SATURDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * TIMING...SNOW...HEAVY AT TIMES...WILL BECOME WIDESPREAD THIS AFTERNOON AND CONTINUE THROUGH THE DAY SATURDAY. * SNOW ACCUMULATIONS...8 TO 18 INCHES. * WIND/VISIBILITY...SOUTHWEST WINDS OF 15 TO 25 MPH WITH GUSTS TO 35 MPH THROUGH TONIGHT...THEN SHIFTING TO THE WEST AND NORTHWEST ON SATURDAY. VISIBILITIES WILL BE REDUCED TO LESS THAN A QUARTER MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED FRIDAY NIGHT AND SATURDAY. WINTER DRIVING CONDITIONS ARE EXPECTED DURING THE SNOWFALL. 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. && $$ COZ033>035-111830- /O.EXT.KBOU.WS.A.0012.151212T0100Z-151213T0000Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- INCLUDING THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK...ESTES PARK...GLENDEVEY... NEDERLAND...RED FEATHER LAKES 328 AM MST FRI DEC 11 2015 ...WINTER STORM WATCH IN EFFECT FROM THIS EVENING THROUGH SATURDAY AFTERNOON... * TIMING...SNOW WILL BECOME WIDESPREAD THIS EVENING AND CONTINUE THROUGH SATURDAY. SNOW COULD BE HEAVY AT TIMES ESPECIALLY NORTH OF THE INTERSTATE 70 CORRIDOR. * SNOW ACCUMULATIONS...6 TO 13 INCHES POSSIBLE WITH THE HIGHEST AMOUNTS NORTH OF THE INTERSTATE 70 CORRIDOR. EXPECT LOWER AMOUNTS OF 4 TO 8 INCHES OVER MOUNTAIN VALLEYS AND SUMMIT COUNTY. * WIND/VISIBILITY...SOUTHWEST WINDS OF 15 TO 25 MPH WITH GUSTS TO 40 MPH THROUGH TONIGHT...SHIFTING TO THE WEST AND NORTHWEST ON SATURDAY. VISIBILITIES WILL BE REDUCED TO LESS THAN A QUARTER MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED TONIGHT AND SATURDAY. WINTER DRIVING CONDITIONS ARE EXPECTED DURING THE SNOWFALL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS. && $$
6 follow-up statements
728 WWUS45 KBOU 111334 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER/BOULDER CO 634 AM MST FRI DEC 11 2015 ...WINTER STORM SYSTEM HEADING TOWARDS COLORADO... A STORM SYSTEM PUSHING INTO WESTERN COLORADO TODAY WILL MAKE ITS WAY ACROSS THE REST OF THIS STATE TONIGHT AND SATURDAY. SNOW WILL DEVELOP IN THE MOUNTAINS THIS MORNING...HEAVIEST IN THE PARK RANGE IN WESTERN JACKSON COUNTY. THE SNOW WILL INCREASE IN COVERAGE AND INTENSITY ALONG THE FRONT RANGE MOUNTAINS AND FOOTHILLS TONIGHT AND SATURDAY...WITH THE HEAVIEST AMOUNTS POSSIBLE NORTH OF INTERSTATE 70. COZ031-112300- /O.EXT.KBOU.WS.W.0016.151211T1334Z-151213T0000Z/ 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 634 AM MST FRI DEC 11 2015 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 5 PM MST SATURDAY... * TIMING...SNOW...HEAVY AT TIMES...WILL DECREASE SLIGHTLY THIS AFTERNOON...THEN INCREASE AGAIN THIS EVENING AND CONTINUE THROUGH THE DAY SATURDAY. * SNOW ACCUMULATIONS...8 TO 18 INCHES. * WIND/VISIBILITY...SOUTHWEST WINDS OF 15 TO 25 MPH WITH GUSTS TO 35 MPH THROUGH TONIGHT...THEN SHIFTING TO THE WEST AND NORTHWEST ON SATURDAY. VISIBILITIES WILL BE REDUCED TO LESS THAN A QUARTER MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED FRIDAY NIGHT AND SATURDAY. WINTER DRIVING CONDITIONS ARE EXPECTED DURING THE SNOWFALL. 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. && $$ COZ033>035-112300- /O.CON.KBOU.WS.A.0012.151212T0100Z-151213T0000Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- INCLUDING THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS... BERTHOUD PASS...BRECKENRIDGE...EAST SLOPES MOSQUITO RANGE... EAST SLOPES SOUTHERN GORE RANGE...EISENHOWER TUNNEL... INDIAN PEAKS...KENOSHA MOUNTAINS...MOUNT EVANS... WILLIAMS FORK MOUNTAINS...WINTER PARK...ESTES PARK...GLENDEVEY... NEDERLAND...RED FEATHER LAKES 634 AM MST FRI DEC 11 2015 ...WINTER STORM WATCH REMAINS IN EFFECT FROM 6 PM MST THIS EVENING THROUGH SATURDAY AFTERNOON... * TIMING...SNOW WILL BECOME WIDESPREAD THIS EVENING AND CONTINUE THROUGH SATURDAY. SNOW COULD BE HEAVY AT TIMES ESPECIALLY NORTH OF THE INTERSTATE 70 CORRIDOR. * SNOW ACCUMULATIONS...6 TO 13 INCHES POSSIBLE WITH THE HIGHEST AMOUNTS NORTH OF THE INTERSTATE 70 CORRIDOR. EXPECT LOWER AMOUNTS OF 4 TO 8 INCHES OVER MOUNTAIN VALLEYS AND SUMMIT COUNTY. * WIND/VISIBILITY...SOUTHWEST WINDS OF 15 TO 25 MPH WITH GUSTS TO 40 MPH THROUGH TONIGHT...SHIFTING TO THE WEST AND NORTHWEST ON SATURDAY. VISIBILITIES WILL BE REDUCED TO LESS THAN A QUARTER MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED TONIGHT AND SATURDAY. WINTER DRIVING CONDITIONS ARE EXPECTED DURING THE SNOWFALL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WATCH MEANS THERE IS A POTENTIAL FOR SIGNIFICANT SNOW THAT MAY IMPACT TRAVEL. CONTINUE TO MONITOR THE LATEST FORECASTS. && $$
763 WWUS45 KBOU 111514 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER/BOULDER CO 814 AM MST FRI DEC 11 2015 ...WINTER STORM SYSTEM HEADING TOWARDS COLORADO... A STORM SYSTEM PUSHING INTO WESTERN COLORADO TODAY WILL MAKE ITS WAY ACROSS THE REST OF THIS STATE LATER TONIGHT AND SATURDAY. SNOW WILL DEVELOP IN THE MOUNTAINS THIS MORNING...HEAVIEST IN THE PARK RANGE IN WESTERN JACKSON COUNTY. THERE WILL BE A LULL IN THE SNOWFALL LATER THIS AFTERNOON AND EVENING BEFORE INCREASING AGAIN ON SATURDAY. COZ031-112315- /O.CON.KBOU.WS.W.0016.000000T0000Z-151213T0000Z/ 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 814 AM MST FRI DEC 11 2015 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY... * TIMING...SNOW...HEAVY AT TIMES...WILL DECREASE SLIGHTLY THIS AFTERNOON...THEN INCREASE AGAIN THIS EVENING AND CONTINUE THROUGH THE DAY SATURDAY. * SNOW ACCUMULATIONS...8 TO 18 INCHES. * WIND/VISIBILITY...SOUTHWEST WINDS OF 15 TO 25 MPH WITH GUSTS TO 35 MPH THROUGH TONIGHT...THEN SHIFTING TO THE WEST AND NORTHWEST ON SATURDAY. VISIBILITIES WILL BE REDUCED TO LESS THAN A QUARTER MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED FRIDAY NIGHT AND SATURDAY. WINTER DRIVING CONDITIONS ARE EXPECTED DURING THE SNOWFALL. 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. && $$ COZ033-112315- /O.UPG.KBOU.WS.A.0012.151212T0100Z-151213T0000Z/ /O.NEW.KBOU.WW.Y.0029.151211T1514Z-151213T0000Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS 814 AM MST FRI DEC 11 2015 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST SATURDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL 5 PM MST SATURDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * TIMING...SNOW WILL CONTINUE TODAY...BUT DECREASING LATER THIS AFTERNOON AND EARLY EVENING. THE SNOW WILL INCREASE AGAIN LATER TONIGHT AND SATURDAY. SNOW COULD BE HEAVY AT TIMES THIS MORNING AND AGAIN ON SATURDAY. * SNOW ACCUMULATIONS...6 TO 12 INCHES BY LATE SATURDAY. * WIND/VISIBILITY...SOUTHWEST WINDS OF 15 TO 25 MPH WITH GUSTS TO 35 MPH THROUGH TONIGHT...SHIFTING TO THE WEST AND NORTHWEST ON SATURDAY. VISIBILITIES WILL BE REDUCED TO LESS THAN A QUARTER MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED TONIGHT AND SATURDAY. WINTER DRIVING CONDITIONS ARE EXPECTED DURING THE SNOWFALL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ COZ034-035-112315- /O.UPG.KBOU.WS.A.0012.151212T0100Z-151213T0000Z/ /O.NEW.KBOU.WW.Y.0029.151212T1200Z-151213T0000Z/ 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- 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... ESTES PARK...GLENDEVEY...NEDERLAND...RED FEATHER LAKES 814 AM MST FRI DEC 11 2015 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 AM TO 5 PM MST SATURDAY... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT FROM 5 AM TO 5 PM MST SATURDAY. THE WINTER STORM WATCH IS NO LONGER IN EFFECT. * TIMING...SNOW WILL BECOME WIDESPREAD ON SATURDAY BEFORE DECREASING SATURDAY EVENING... * SNOW ACCUMULATIONS...5 TO 11 INCHES BY SATURDAY EVENING. * WIND/VISIBILITY...SOUTHWEST WINDS OF 15 TO 25 MPH WITH GUSTS TO 40 MPH THROUGH TONIGHT...SHIFTING TO THE WEST AND NORTHWEST ON SATURDAY. VISIBILITIES WILL BE REDUCED TO LESS THAN A QUARTER MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED TONIGHT AND SATURDAY. WINTER DRIVING CONDITIONS ARE EXPECTED DURING THE SNOWFALL. 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. && $$
361 WWUS45 KBOU 112239 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER/BOULDER CO 339 PM MST FRI DEC 11 2015 ...WINTER STORM SYSTEM HEADING TOWARDS COLORADO... A STORM SYSTEM DEVELOPING ACROSS THE SOUTHERN GREAT BASIN WILL SHIFT EAST INTO NEW MEXICO ON SATURDAY. SNOW WILL REDEVELOP IN THE MOUNTAINS TONIGHT AND BECOMING MORE WIDESPREAD OVER ALL THE MOUNTAINS ON SATURDAY. THE HEAVIEST SNOW WILL BE IN THE PARK RANGE IN WESTERN JACKSON COUNTY TONIGHT AND THEN SHIFTING FURTHER SOUTH ACROSS THE INTERSTATE 70 CORRIDOR ON SATURDAY. COZ031-120645- /O.CON.KBOU.WS.W.0016.000000T0000Z-151213T0000Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS 339 PM MST FRI DEC 11 2015 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY... * TIMING...SNOW...HEAVY AT TIMES...WILL CONTINUE THROUGH MUCH OF SATURDAY...BUT GRADUALLY DECREASING LATER SATURDAY IN THE AFTERNOON. * SNOW ACCUMULATIONS...8 TO 18 INCHES. * WIND/VISIBILITY...SOUTHWEST WINDS OF 15 TO 30 MPH THROUGH TONIGHT...THEN SHIFTING TO THE WEST AND NORTHWEST ON SATURDAY. VISIBILITIES WILL BE REDUCED TO LESS THAN A QUARTER MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED FRIDAY NIGHT AND SATURDAY. WINTER DRIVING CONDITIONS ARE EXPECTED DURING THE SNOWFALL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ COZ033-120645- /O.CON.KBOU.WW.Y.0029.000000T0000Z-151213T0000Z/ 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 339 PM MST FRI DEC 11 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY... * TIMING...SNOW WILL BECOME MORE WIDESPREAD AGAIN THIS EVENING AND CONTINUE THROUGH MUCH OF SATURDAY. * SNOW ACCUMULATIONS...7 TO 14 INCHES BY SATURDAY EVENING. * WIND/VISIBILITY...SOUTHWEST WINDS OF 15 TO 25 MPH WITH GUSTS TO 35 MPH THROUGH TONIGHT...SHIFTING TO THE WEST AND NORTHWEST ON SATURDAY. VISIBILITIES WILL BE REDUCED TO LESS THAN A QUARTER MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED TONIGHT AND SATURDAY. WINTER DRIVING CONDITIONS ARE EXPECTED DURING THE SNOWFALL. 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. && $$ COZ034-035-120645- /O.CON.KBOU.WW.Y.0029.151212T1200Z-151213T0000Z/ SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- INCLUDING THE CITIES OF...BERTHOUD PASS...BRECKENRIDGE... EAST SLOPES MOSQUITO RANGE...EAST SLOPES SOUTHERN GORE RANGE... EISENHOWER TUNNEL...INDIAN PEAKS...KENOSHA MOUNTAINS... MOUNT EVANS...WILLIAMS FORK MOUNTAINS...WINTER PARK... ESTES PARK...GLENDEVEY...NEDERLAND...RED FEATHER LAKES 339 PM MST FRI DEC 11 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 AM TO 5 PM MST SATURDAY... * TIMING...SNOW WILL BECOME WIDESPREAD LATE TONIGHT AND SATURDAY MORNING BEFORE DECREASING SATURDAY EVENING... * SNOW ACCUMULATIONS...5 TO 11 INCHES BY SATURDAY EVENING. * WIND/VISIBILITY...SOUTHWEST WINDS OF 15 TO 25 MPH WITH GUSTS TO 40 MPH THROUGH TONIGHT...SHIFTING TO THE WEST AND NORTHWEST ON SATURDAY. VISIBILITIES WILL BE REDUCED TO LESS THAN A QUARTER MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED TONIGHT AND SATURDAY. WINTER DRIVING CONDITIONS ARE EXPECTED DURING THE SNOWFALL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
346 WWUS45 KBOU 120447 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER/BOULDER CO 947 PM MST FRI DEC 11 2015 ...WINTER STORM SYSTEM HEADING TOWARDS COLORADO... A WINTER STORM MOVING OVER THE SOUTHWESTERN U.S. TONIGHT AND SATURDAY WILL BRING AREAS OF MODERATE TO HEAVY SNOWFALL ACROSS COLORADO THROUGH SATURDAY EVENING. LIGHT AND MODERATE SNOWFALL HAS BEEN FALLING OVER WESTERN COLORADO THIS EVENING WHICH WILL BE SPREADING EASTWARD LATER TONIGHT. PARTS OF THE NORTH CENTRAL COLORADO MOUNTAINS HAVE ALSO BEEN GETTING SNOW THIS EVENING. AS THE SNOW CONTINUES FALLING IN THE NORTHERN COLORADO MOUNTAINS TONIGHT AND SATURDAY...TRAVEL WILL BECOME DIFFICULT DUE TO SNOW COVERED ROADWAYS. COZ031-121300- /O.CON.KBOU.WS.W.0016.000000T0000Z-151213T0000Z/ 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 947 PM MST FRI DEC 11 2015 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY... * TIMING...SNOW...HEAVY AT TIMES...WILL CONTINUE THROUGH MUCH OF SATURDAY...BUT GRADUALLY DECREASE LATER SATURDAY AFTERNOON AND EVENING. * SNOW ACCUMULATIONS...8 TO 18 INCHES. * WIND/VISIBILITY...SOUTHWEST WINDS OF 15 TO 30 MPH THROUGH TONIGHT WILL SHIFT TO THE WEST AND NORTHWEST BY SATURDAY AFTERNOON. VISIBILITIES WILL BE REDUCED TO LESS THAN A QUARTER MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED TONIGHT AND SATURDAY. WINTER DRIVING CONDITIONS ARE EXPECTED DURING THE SNOWFALL. 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. && $$ COZ033-121300- /O.CON.KBOU.WW.Y.0029.000000T0000Z-151213T0000Z/ SOUTH AND EAST JACKSON/LARIMER/NORTH AND NORTHEAST GRAND/ NORTHWEST BOULDER COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF...CAMERON PASS... LARAMIE AND MEDICINE BOW MOUNTAINS...RABBIT EARS RANGE... ROCKY MOUNTAIN NATIONAL PARK...WILLOW CREEK PASS 947 PM MST FRI DEC 11 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST SATURDAY... * TIMING...SNOW WILL BECOME MORE WIDESPREAD OVERNIGHT AND CONTINUE THROUGH MUCH OF SATURDAY. * SNOW ACCUMULATIONS...7 TO 14 INCHES BY SATURDAY EVENING. * WIND/VISIBILITY...SOUTHWEST WINDS OF 15 TO 25 MPH WITH GUSTS TO 35 MPH THROUGH TONIGHT...SHIFTING TO THE WEST AND NORTHWEST ON SATURDAY. VISIBILITIES WILL BE REDUCED TO LESS THAN A QUARTER MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED TONIGHT AND SATURDAY. WINTER DRIVING CONDITIONS ARE EXPECTED DURING THE SNOWFALL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ COZ034-035-121300- /O.CON.KBOU.WW.Y.0029.151212T1200Z-151213T0000Z/ 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- 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... ESTES PARK...GLENDEVEY...NEDERLAND...RED FEATHER LAKES 947 PM MST FRI DEC 11 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 AM TO 5 PM MST SATURDAY... * TIMING...SNOW WILL BECOME WIDESPREAD LATE TONIGHT AND SATURDAY MORNING AND THEN CONTINUE INTO SATURDAY EVENING... * SNOW ACCUMULATIONS...5 TO 11 INCHES BY SATURDAY EVENING. * WIND/VISIBILITY...SOUTHWEST WINDS OF 15 TO 25 MPH WITH GUSTS TO 40 MPH THROUGH TONIGHT...SHIFTING TO THE WEST AND NORTHWEST SATURDAY AFTERNOON. VISIBILITIES WILL BE REDUCED TO LESS THAN A QUARTER MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED TONIGHT AND SATURDAY. WINTER DRIVING CONDITIONS ARE EXPECTED DURING THE SNOWFALL. 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. && $$
657 WWUS45 KBOU 121046 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER/BOULDER CO 346 AM MST SAT DEC 12 2015 ...WINTER STORM SYSTEM HEADING TOWARDS COLORADO... A WINTER STORM MOVING OVER THE SOUTHWESTERN U.S. TODAY THROUGH TONIGHT SATURDAY WILL BRING MORE SNOW TO THE MOUNTAINS OF NORTHERN COLORADO. AS THE SNOW CONTINUES FALLING THROUGH THE DAY...TRAVEL WILL BECOME DIFFICULT DUE TO ICY AND SNOW COVERED ROADWAYS. COZ031-121845- /O.CON.KBOU.WS.W.0016.000000T0000Z-151213T0000Z/ WEST JACKSON AND WEST GRAND COUNTIES ABOVE 9000 FEET- INCLUDING THE CITIES OF... EAST SLOPES PARK AND NORTHERN GORE RANGES...GORE PASS... RABBIT EARS PASS 346 AM MST SAT DEC 12 2015 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * TIMING...SNOW WILL CONTINUE THROUGH THIS AFTERNOON THEN DECREASE THIS EVENING. * SNOW ACCUMULATIONS...ADDITIONAL SNOWFALL OF 3 TO 6 INCHES. * WIND/VISIBILITY...VISIBILITIES WILL BE REDUCED TO LESS THAN A HALF MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED TODAY. WINTER DRIVING CONDITIONS ARE EXPECTED DURING THE SNOWFALL. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING FOR HEAVY SNOW MEANS SEVERE WINTER WEATHER CONDITIONS ARE EXPECTED OR OCCURRING. SIGNIFICANT AMOUNTS OF SNOW ARE FORECAST THAT WILL MAKE TRAVEL DANGEROUS. ONLY TRAVEL IN AN EMERGENCY. IF YOU MUST TRAVEL...KEEP AN EXTRA FLASHLIGHT... FOOD...AND WATER IN YOUR VEHICLE IN CASE OF AN EMERGENCY. && $$ COZ033-121845- /O.CON.KBOU.WW.Y.0029.000000T0000Z-151213T0000Z/ 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 346 AM MST SAT DEC 12 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * TIMING...SNOW WILL CONTINUE THROUGH THIS AFTERNOON THEN DECREASE THIS EVENING. * SNOW ACCUMULATIONS...ADDITIONAL SNOWFALL OF 4 TO 6 INCHES. * WIND/VISIBILITY...VISIBILITIES WILL BE REDUCED TO LESS THAN A HALF MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED TODAY...BE PREPARED FOR WINTER DRIVING CONDITIONS. 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. && $$ COZ034-035-121845- /O.CON.KBOU.WW.Y.0029.151212T1200Z-151213T0000Z/ SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- INCLUDING THE CITIES OF...BERTHOUD PASS...BRECKENRIDGE... EAST SLOPES MOSQUITO RANGE...EAST SLOPES SOUTHERN GORE RANGE... EISENHOWER TUNNEL...INDIAN PEAKS...KENOSHA MOUNTAINS... MOUNT EVANS...WILLIAMS FORK MOUNTAINS...WINTER PARK... ESTES PARK...GLENDEVEY...NEDERLAND...RED FEATHER LAKES 346 AM MST SAT DEC 12 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * TIMING...SNOW WILL CONTINUE THROUGH THE DAY...THEN GRADUALLY DECREASE THIS EVENING. * SNOW ACCUMULATIONS...ADDITIONAL SNOWFALL 4 TO 8 INCHES. * WIND/VISIBILITY...VISIBILITIES WILL BE REDUCED TO LESS THAN A HALF MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED...BE PREPARED FOR WINTER DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
718 WWUS45 KBOU 121749 WSWBOU URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE DENVER/BOULDER CO 1049 AM MST SAT DEC 12 2015 ...FINALLY SNOWING ACROSS MUCH OF NORTHERN AND NORTHEAST COLORADO... A WINTER STORM WHICH HAS BEEN VERY SLOW TO EVOLVE ACROSS THE REGION IS FINALLY SPREADING SNOW OVER MUCH OF NORTHERN COLORADO. SNOW WILL CONTINUE TO BECOME MORE WIDESPREAD THIS AFTERNOON. AS THE SNOW CONTINUES FALLING THROUGH THE DAY...TRAVEL WILL BECOME DIFFICULT DUE TO ICY AND SNOW COVERED ROADWAYS OVER MOUNTAIN ROADS AND PASSES. THE WINTER STORM WARNING HAS BEEN CANCELLED ACROSS THE MOUNTAINS OF WESTERN JACKSON COUNTY AS SNOWFALL FOCUS HAS SHIFTED FURTHER EAST AND SOUTH. DESPITE LOCALLIZED HEAVY BANDS OF SNOW ACROSS LARIMER AND NORTHERN WELD COUNTIES THIS MORNING...ROADS HAVE BEEN MAINLY WET. A WINTER WEATHER ADVISORY HAS BEEN ADDED TO PARK COUNTY FOR THIS AFTERNOON. COZ031-121900- /O.CAN.KBOU.WS.W.0016.000000T0000Z-151213T0000Z/ 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 1049 AM MST SAT DEC 12 2015 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN DENVER HAS CANCELLED THE WINTER STORM WARNING. ONLY LIGHT SNOWFALL IS EXPECTED THROUGH THIS EVENING WITH AN ADDITIONAL 1 TO 3 INCHES. $$ COZ037-130000- /O.EXA.KBOU.WW.Y.0029.000000T0000Z-151213T0000Z/ CENTRAL AND SOUTHEAST PARK COUNTY- INCLUDING THE CITIES OF...FAIRPLAY...HARTSEL...LAKE GEORGE... SOUTH PARK 1049 AM MST SAT DEC 12 2015 ...WINTER WEATHER ADVISORY IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... THE NATIONAL WEATHER SERVICE IN DENVER HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW...WHICH IS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON. * TIMING...SNOW WILL CONTINUE THROUGH THE DAY...THEN GRADUALLY DECREASE THIS EVENING. * SNOW ACCUMULATIONS...4 TO 8 INCHES. * WIND/VISIBILITY...VISIBILITIES WILL BE REDUCED TO LESS THAN A HALF MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED...BE PREPARED FOR WINTER DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ COZ033-130000- /O.CON.KBOU.WW.Y.0029.000000T0000Z-151213T0000Z/ 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 1049 AM MST SAT DEC 12 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * TIMING...SNOW WILL CONTINUE THROUGH THIS AFTERNOON THEN DECREASE THIS EVENING. * SNOW ACCUMULATIONS...ADDITIONAL SNOWFALL OF 3 TO 6 INCHES. * WIND/VISIBILITY...VISIBILITIES WILL BE REDUCED TO LESS THAN A HALF MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED TODAY...BE PREPARED FOR WINTER DRIVING CONDITIONS. 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. && $$ COZ034-035-130000- /O.CON.KBOU.WW.Y.0029.000000T0000Z-151213T0000Z/ SOUTH AND SOUTHEAST GRAND/WEST CENTRAL AND SOUTHWEST BOULDER/ GILPIN/CLEAR CREEK/SUMMIT/NORTH AND WEST PARK COUNTIES ABOVE 9000 FEET-LARIMER AND BOULDER COUNTIES BETWEEN 6000 AND 9000 FEET- INCLUDING THE CITIES OF...BERTHOUD PASS...BRECKENRIDGE... EAST SLOPES MOSQUITO RANGE...EAST SLOPES SOUTHERN GORE RANGE... EISENHOWER TUNNEL...INDIAN PEAKS...KENOSHA MOUNTAINS... MOUNT EVANS...WILLIAMS FORK MOUNTAINS...WINTER PARK... ESTES PARK...GLENDEVEY...NEDERLAND...RED FEATHER LAKES 1049 AM MST SAT DEC 12 2015 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON... * TIMING...SNOW WILL CONTINUE THROUGH THE DAY...THEN GRADUALLY DECREASE THIS EVENING. * SNOW ACCUMULATIONS...ADDITIONAL SNOWFALL 4 TO 8 INCHES. * WIND/VISIBILITY...VISIBILITIES WILL BE REDUCED TO LESS THAN A HALF MILE AT TIMES IN HEAVIER SNOWFALL. * IMPACTS...MOUNTAIN PASSES WILL BECOME ICY AND SNOWPACKED...BE PREPARED FOR WINTER DRIVING CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
What forecasters said that day
The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Denver/Boulder, CO wrote its last area forecast discussion before this winter storm warning went out at Dec 11, 3:28 AM MST, 0 minutes earlier.
Area forecast discussion, Dec 11, 3:28 AM MST, 0 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE DENVER/BOULDER CO 328 AM MST FRI DEC 11 2015 .SHORT TERM...(TODAY AND TONIGHT) ISSUED AT 244 AM MST FRI DEC 11 2015 A STRONG SOUTHWESTERLY FLOW ALOFT WILL BE OVER COLORADO TODAY. SNOW ALREADY DEVELOPING IN THE MOUNTAINS THIS MORNING AND HAVE UPGRADED THE WINTER STORM WATCH TO A WARNING IN ZONE 31. THIS AREA MOST FAVORED OROGRAPHICALLY AND WITH A 140 KT JET OVERHEAD TODAY AND THIS EVENING...IT SHOULD GET STARTED SOONER. STILL ON THE FENCE WITH A WARNING VS A WINTER WEATHER ADVISORY FOR ZONES 33>35 SO WILL HANG ONTO THE WATCH FOR NOW. BEST TIME FOR SNOW IN THESE ZONE WILL BE OVERNIGHT INTO SATURDAY. ACROSS THE URBAN CORRIDOR...WITH RADAR ALREADY SHOWING PCPN OVER LARIMER COUNTY...SOME RAIN SHOWERS WILL GET STARTED THERE FIRST. WARMEST TEMPERATURES AT FT COLLINS WL BE THIS MORNING WITH READINGS STILL IN THE UPPER 40S. WESTERLY WINDS WILL SO NORTH/NORTHEASTERLY LATER TODAY AS THE SFC LOW SLIDES TO THE SOUTH. SHOULD BE MAINLY RAIN SHOWERS DEVELOPING TODAY...WITH MIX OF RAIN AND SNOW THIS EVENING. INCREASING DYNAMICS WITH THE UPPER LEVEL JET SHIFTING EASTWARD TONIGHT AND ENHANCED UPSLOPE. WL GO WITH SNOW AFTER 06Z THIS EVENING. HIGHEST SNOW AMOUNTS OVERNIGHT STILL APPEAR TO BE EASTERN LARIMER AND NORTHERN WELD COUNTY. MAY NEED SOME SORT OF ADVISORY FOR THE PLAINS AS THE MDLS DO SHOW BANDED TYPE OF PATTERN WITH THE QPF...WHICH WOULD INFER SOME CSI SNOWFALL ONCE WE GET ON THE COLD SIDE OF THE UPPER JET. HARD TO SAY HOWEVER WHERE THESE BANDS WILL FORM. .LONG TERM...(SATURDAY THROUGH THURSDAY) ISSUED AT 244 AM MST FRI DEC 11 2015 MODELS HAVE STRONG SOUTHWESTERLY FLOW ALOFT FOR THE CWA SATURDAY MORNING. AN UPPER TROUGH AXIS IS PROGGED OVER THE WESTERN COLORADO BORDER AT 18Z SATURDAY NOONTIME. THE TROUGH AXIS IS OVER THE EASTERN COLORADO BORDER AT 12Z SUNDAY MORNING. THERE IS NORTHWESTERLY FLOW ALOFT ALL DAY SUNDAY...BECOMING DUE WESTERLY SUNDAY EVENING...THE SOUTHWESTERLY BY MONDAY MORNING. THERE IS WEAK TO MODERATE UPWARD QG VERTICAL VELOCITY ON SATURDAY INTO EARLY EVENING. DOWNWARD ENERGY IS OVER THE CWA BY SUNDAY AND SUNDAY EVENING...THEN WEAK UPWARD MOTION MOVES IN BY MONDAY MORNING. THE BOUNDARY LAYER FLOW IS EASTWARD UPSLOPE FOR THE PLAINS AND FOOTHILLS ON SATURDAY BECOMING MORE NORTHEASTERLY SATURDAY EVENING...THEN NORTHERLY SATURDAY NIGHT LATE. SUNDAY SHOWS ALL NORTHWESTERLIES. THERE ARE NORMAL DRAINAGE WINDS EXPECTED SUNDAY NIGHT. MOISTURE-WISE...IT IS FAIRLY DEEP ON ALL THE MODELS FOR ALL THE CWA SATURDAY AND SATURDAY EVENING. IT STAYS PRETTY DEEP OVER THE EASTERN HALF OF THE CWA INTO SUNDAY MORNING MORE SO ON THE SLIGHTLY SLOWER ECMWF. THE NAM AND GFS SHOW THE CWA PRETTY DRY ALREADY BY 12Z SUNDAY MORNING. THE EASTERN CWA STAYS PRETTY DRY THROUGH 12Z MONDAY MORNING. THERE IS SOME MOISTURE OVER THE MOUNTAINS SUNDAY AND SUNDAY NIGHT...BUT NOTHING SIGNIFICANT. THE QPF FIELDS HAVE DECENT SNOWFALL OVER THE MOUNTAINS SATURDAY AND SATURDAY EVENING...THEN A TAD THROUGH 12Z SUNDAY MORNING. FOR THE PLAINS...THERE IS SOME SNOWFALL PROGGED ON SATURDAY...THEN JUST MINOR AMOUNTS SATURDAY EVENING. THERE IS NO MEASURABLE SNOWFALL SUNDAY OR SUNDAY NIGHT. CONCERNING POPS...WILL STAY THE COURSE AND HAVE 60-90%S ALL DAY SATURDAY FOR ALL THE CWA. THERE WILL BE OROGRAPHIC ENHANCEMENT IN THE HIGH MOUNTAINS BY LATE MORNING ONWARD. HOWEVER THE MOISTURE DOES SIGNIFICANTLY DECREASE AFTER 00Z SATURDAY LATE DAY FROM WEST TO EAST. CONCERNING THE HIGHLIGHTS... AGREE WITH SHORT TERM FORCASTER'S THINKING. THE PLAINS MIGHT SEE BETTER SNOWFALL AMOUNTS...BUT THE UPSLOPE IS ONLY FAIR AND NOT VERY DEEP. ALSO THE SYNOPTIC SCALE ENERGY IS JUST FAIR. FOR TEMPERATURES...SATURDAY'S HIGHS ARE 6-12 C COLDER THAN TODAY'S. SUNDAY'S HIGHS COME UP 2-5 C FROM SATURDAY'S AND THERE WILL BE SOME SUN IN MOST AREAS. FOR THE LATER DAYS...MONDAY THROUGH THURSDAY...THERE IS PRETTY STRONG SOUTHWESTERLY FLOW ALOFT ON MONDAY AHEAD OF ANOTHER INCOMING UPPER TROUGH. THIS ONE IS BROADER AND SOME OF THE MODELS DEVELOP A CIRCULATION WITH IT BUT ITS OVER EASTERN COLORADO MONDAY NIGHT. THE UPPER TROUGH IS SLOW IN MOVING EAST AND THE TROUGH AXIS DOESN'T MOVE OVER THE CWA UNTIL WEDNESDAY NIGHT INTO MID DAY THURSDAY. THERE IS A PROLONGED PERIOD OF DEEP MOISTURE...BUT THE SYNOPTIC SCALE ENERGY IS UPWARD ONLY UNTIL TUESDAY SOMETIME. IT IS ALL DOWNWARD TUESDAY NIGHT THROUGH THURSDAY. THERE IS NEVER ANY REAL UPSLOPE PROGGED FOR THE PLAINS AND FOOTHILLS EITHER. IT SHOULD BE SOMEWHAT UNSETTLED BUT IT DOES NOT LOOK LIKE A SIGNIFICANT SNOWSTORM. TEMPERATURES STAY BELOW SEASONAL NORMALS. && .AVIATION...(FOR THE 12Z TAFS THROUGH 12Z SATURDAY MORNING) ISSUED AT 244 AM MST FRI DEC 11 2015 THE SFC LOW EAST OF DENVER THIS MORNING IS EXPECTED TO SHIFT TO THE SOUTH LATER THIS MORNING...WITH THE WINDS BECOMING NNELY LATER THIS MORNING WITH A COLD FRONT PUSHING IN FROM THE NORTH BY EARLY AFTN. VFR CONDITIONS THROUGH 22Z WITH JUST ISOLD RAIN SHOWERS IN THE VICINITY...COULD SEE BKN ILS CIGS OF 6K FT AGL DEVELOPING BY THAT TIME. CIGS WILL CONTINUE TO LOWER THIS EVENING WITH MIX OF RAIN AND SNOW...MVFR RESTRICTIONS DEVELOPING 04Z-06Z...THEN IFR CIG/VSBY RESTRICTIONS AS PCPN TURNS OVER TO SNOW...ESPECIALLY AFTER 09Z. SURFACE WINDS SHOULD REMAIN NELY THIS EVENING INTO SATURDAY MORNING. && .BOU WATCHES/WARNINGS/ADVISORIES... WINTER STORM WATCH FROM THIS EVENING THROUGH SATURDAY AFTERNOON FOR COZ033>035. WINTER STORM WARNING FROM NOON TODAY TO 5 PM MST SATURDAY FOR COZ031. && SHORT TERM...COOP LONG TERM...KOOP AVIATION...COOP
Hazardous weather outlook, Dec 10, 11:24 AM MST, 16 hours 4 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE DENVER/BOULDER CO 1124 AM MST THU DEC 10 2015 COZ030>051-111830- 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- 1124 AM MST THU DEC 10 2015 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTHEAST AND NORTH CENTRAL COLORADO. .DAY ONE...TODAY AND TONIGHT MOUNTAIN RIDGES AND FRONT RANGE FOOTHILL AREAS WILL CONTINUE TO BE WINDY TODAY ALTHOUGH SPEEDS WILL BE LESS TODAY WITH THE HIGHEST GUSTS IN THE 40 TO 50 MPH RANGE. TEMPERATURES WILL REMAIN WELL ABOVE AVERAGE...BUT SEVERAL DEGREES COOLER THAN YESTERDAY IN MANY AREAS. OVERNIGHT..THERE IS A CHANCE OF LIGHT SNOW OVER THE NORTHERN MOUNTAIN RANGES AFTER MIDNIGHT AHEAD OF A POTENT PACIFIC STORM SYSTEM MOVING ACROSS THE GREAT BASIN. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY A STRONG SOUTHWESTERLY FLOW ALOFT WILL BE OVER COLORADO ON FRIDAY AHEAD OF THE NEXT APPROACHING PACIFIC STORM SYSTEM. SNOW WILL DEVELOP IN THE MOUNTAINS LATE TONIGHT AND FRIDAY MORNING...SPREADING INTO THE FRONT RANGE FOOTHILLS AND NORTHEAST PLAINS FRIDAY NIGHT AND SATURDAY. PERIODS OF ACCUMULATING SNOWFALL WILL BE LIKELY IN THE HIGH COUNTRY FRIDAY AND FRIDAY NIGHT...THEN ACROSS THE LOWER ELEVATIONS FRIDAY NIGHT AND SATURDAY. AT THIS TIME...THE HEAVIEST SNOWFALL IS EXPECTED TO OCCUR NORTH AND NORTHWEST OF DENVER...ESPECIALLY ACROSS LARIMER...JACKSON AND NORTHERN WELD COUNTIES. STORM TOTALS OF 6 TO 12 INCHES WILL BE POSSIBLE IN THE MOUNTAINS AND FOOTHILLS...WITH ANYWHERE FROM 2 TO 6 INCHES ACROSS THE URBAN CORRIDOR AND NORTHEAST PLAINS. THE MOUNTAINS AND HIGH VALLEYS COULD SEE ANOTHER SHOT OF GUSTY WINDS AND SNOW SUNDAY NIGHT AND MONDAY. THEN ANOTHER SYSTEM IS EXPECTED TO BRING ANOTHER CHANCE OF SNOW TO COLORADO MONDAY NIGHT AND TUESDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. BAKER/ENTREKIN
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 11, 8:14 AM MST | Winter Weather Advisory | BOU | Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more | 31 hr |
Nearby
Winter Storm Warnings in Colorado, 2015Every winter storm warning in 2015
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.