Alert archive / Colorado / Winter Storm Warnings in 2019
Winter Storm Warning 3, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this winter storm warning at Feb 13, 2019, 4:26 AM MST for 4 counties in Colorado. It took effect at Feb 13, 2019, 5:00 PM MST. It was in force for 18 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 13, 2019, 4:26 AM MST (11:26 UTC)
- In effect from
- Feb 13, 2019, 5:00 PM MST
- Expired
- Feb 14, 2019, 11:00 AM MST
- In force
- 18 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Boulder County, CO, Grand County, CO, Jackson County, CO, Larimer County, CO
The radar
The Cheyenne radar (KCYS), 121 km from the middle of the area, began a volume at 11:28 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Denver, CO (KDEN), launched 00:00Z, 11.4 hours before the alert went out and 227 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
- 3138 m above ground
- 0-6 km bulk shear
- 75 kt
- 0-1 km storm-relative helicity
- 39 m²/s²
- 0-3 km storm-relative helicity
- 354 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
063 WWUS45 KBOU 131126 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 426 AM MST Wed Feb 13 2019 ...HEAVY SNOW MOVING INTO THE MOUNTAINS TONIGHT... .Increasing moisture moving into Colorado later today and tonight will combine with the strong winds aloft to produce moderate to heavy snowfall in the mountains tonight and Thursday morning. Windy conditions are expected through today, and the addition of snowfall tonight will make for hazardous travel conditions through the Colorado high country tonight. The gusty winds will produce areas of blowing and drifting snow with very low visibilities at times. The heaviest snow amounts are expected to be in the mountains of Grand and Jackson counties, with lesser amounts in North Park and Middle Park. Snow amounts will also be lower in Summit County, but blowing and drifting snow will still make travel difficult overnight. COZ031-033-131930- /O.NEW.KBOU.WS.W.0003.190214T0000Z-190214T1800Z/ Rabbit Ears Pass- Rocky Mountain National Park and the Medicine Bow Range- Including the cities of East Slopes Park and Northern Gore Ranges, Gore Pass, Rabbit Ears Pass, Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, and Willow Creek Pass 426 AM MST Wed Feb 13 2019 ...WINTER STORM WARNING IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY... * WHAT...Heavy snow expected. Total snow accumulations of 6 to 12 inches expected. Winds gusting as high as 70 mph. * WHERE...Rabbit Ears Pass and Rocky Mountain National Park and the Medicine Bow Range. * WHEN...From 5 PM this afternoon to 11 AM MST Thursday. * ADDITIONAL DETAILS...Travel could be very difficult. Areas of blowing snow could significantly reduce visibility. The hazardous conditions will have the greatest impact on the Thursday morning travel time. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions will make travel very hazardous or impossible. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ COZ034-131930- /O.NEW.KBOU.WW.Y.0011.190214T0000Z-190214T1800Z/ The Mountains of Summit County, the Mosquito Range, and the Indian Peaks- Including the cities of Berthoud Pass, Breckenridge, East Slopes Mosquito Range, East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Evans, Williams Fork Mountains, and Winter Park 426 AM MST Wed Feb 13 2019 ...WINTER WEATHER ADVISORY IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY... * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches expected. Winds gusting as high as 65 mph. * WHERE...The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...From 5 PM this afternoon to 11 AM MST Thursday. * ADDITIONAL DETAILS...Plan on slippery road conditions. Areas of blowing snow could significantly reduce visibility. The hazardous conditions will impact the Thursday morning travel time. Very strong winds could cause extensive tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Expect snow covered roads and limited visibilities, and use caution while driving. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
5 follow-up statements
576 WWUS45 KBOU 131828 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 1128 AM MST Wed Feb 13 2019 ...HEAVY SNOW MOVING INTO THE MOUNTAINS TONIGHT... .Increasing moisture moving into Colorado later today and tonight will combine with the strong winds aloft to produce moderate to heavy snowfall in the mountains tonight and Thursday morning. Windy conditions are expected through today, and the addition of snowfall tonight will make for hazardous travel conditions through the Colorado high country later tonight into Thursday morning. The gusty winds will produce areas of blowing and drifting snow with very low visibilities at times. The heaviest snow amounts are expected to be in the mountains of Grand and Jackson counties, with lesser amounts in North Park and Middle Park. Snow amounts will be lower in Summit County, but blowing and drifting snow will still make travel difficult overnight. COZ031-033-140100- /O.CON.KBOU.WS.W.0003.190214T0000Z-190214T1800Z/ Rabbit Ears Pass- Rocky Mountain National Park and the Medicine Bow Range- Including the cities of East Slopes Park and Northern Gore Ranges, Gore Pass, Rabbit Ears Pass, Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, and Willow Creek Pass 1128 AM MST Wed Feb 13 2019 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY... * WHAT...Heavy snow expected. Total snow accumulations of 6 to 12 inches expected. Winds gusting as high as 70 mph. * WHERE...Rabbit Ears Pass and Rocky Mountain National Park and the Medicine Bow Range. * WHEN...From 5 PM this afternoon to 11 AM MST Thursday. * ADDITIONAL DETAILS...Travel could be very difficult. Areas of blowing snow could significantly reduce visibility. The hazardous conditions will have the greatest impact on the Thursday morning travel time. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions will make travel very hazardous or impossible. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ COZ034-140100- /O.CON.KBOU.WW.Y.0011.190214T0000Z-190214T1800Z/ The Mountains of Summit County, the Mosquito Range, and the Indian Peaks- Including the cities of Berthoud Pass, Breckenridge, East Slopes Mosquito Range, East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Evans, Williams Fork Mountains, and Winter Park 1128 AM MST Wed Feb 13 2019 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 11 AM MST THURSDAY... * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches expected. Winds gusting as high as 70 mph. * WHERE...The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...From 5 PM this afternoon to 11 AM MST Thursday. * ADDITIONAL DETAILS...Plan on slippery road conditions. Areas of blowing snow could significantly reduce visibility. The hazardous conditions will impact the Thursday morning travel time. Very strong winds could cause extensive tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Expect snow covered roads and limited visibilities, and use caution while driving. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
528 WWUS45 KBOU 132157 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 257 PM MST Wed Feb 13 2019 ...HEAVY SNOW MOVING INTO THE MOUNTAINS TONIGHT... .Increasing moisture moving into Colorado this afternoon and tonight will combine with the strong winds aloft to produce moderate to heavy snowfall. The winds and snowfall will make for hazardous travel conditions through the Colorado high country. The gusty winds will produce areas of blowing and drifting snow with very low visibilities at times. The heaviest snow amounts are expected to be in the mountains of Grand and Jackson counties, with lesser amounts in North Park and Middle Park. Snow amounts will be lower in Summit County, but blowing and drifting snow will still make travel difficult overnight. Another storm system will bring more snow to the mountains Thursday evening through Friday morning with additional snowfall of 4 to 8 inches. COZ031-033-140600- /O.NEW.KBOU.WW.Y.0012.190215T0300Z-190215T1600Z/ /O.CON.KBOU.WS.W.0003.190214T0000Z-190214T1800Z/ Rabbit Ears Pass- Rocky Mountain National Park and the Medicine Bow Range- Including the cities of East Slopes Park and Northern Gore Ranges, Gore Pass, Rabbit Ears Pass, Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, and Willow Creek Pass 257 PM MST Wed Feb 13 2019 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... ...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THURSDAY TO 9 AM MST FRIDAY... * WHAT...Heavy snow. Total snow accumulations of 8 to 14 inches expected through Thursday morning. Winds gusting as high as 70 mph tonight. * WHERE...Rabbit Ears Pass and Rocky Mountain National Park and the Medicine Bow Range. * WHEN...For the Winter Storm Warning, until 11 AM MST Thursday. For the Winter Weather Advisory, from 8 PM Thursday to 9 AM MST Friday. * ADDITIONAL DETAILS...Travel could be very difficult to impossible. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the morning or evening commute. Very strong winds could cause extensive tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions will make travel very hazardous or impossible. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Expect snow covered roads and limited visibilities, and use caution while driving. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ COZ034-140600- /O.NEW.KBOU.WW.Y.0012.190215T0300Z-190215T1600Z/ /O.CON.KBOU.WW.Y.0011.190214T0000Z-190214T1800Z/ The Mountains of Summit County, the Mosquito Range, and the Indian Peaks- Including the cities of Berthoud Pass, Breckenridge, East Slopes Mosquito Range, East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Evans, Williams Fork Mountains, and Winter Park 257 PM MST Wed Feb 13 2019 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... ...WINTER WEATHER ADVISORY IN EFFECT FROM 8 PM THURSDAY TO 9 AM MST FRIDAY... * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches expected through Thursday morning. Winds gusting as high as 65 mph tonight. * WHERE...The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...For the Winter Weather Advisory, until 11 AM MST Thursday. For the Winter Weather Advisory, from 8 PM Thursday to 9 AM MST Friday. * ADDITIONAL DETAILS...Travel could be very difficult. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the morning or evening commute. Very strong winds could cause extensive tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Expect snow covered roads and limited visibilities, and use caution while driving. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
054 WWUS45 KBOU 140345 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 845 PM MST Wed Feb 13 2019 ...SNOW CONTINUING IN THE MOUNTAINS TONIGHT... .There has been a lull in the snowfall this evening but is expected to increase again towards midnight and continue through Thursday morning. The winds and snowfall will make for hazardous travel conditions through the Colorado high country. The gusty winds will produce areas of blowing and drifting snow with very low visibilities at times. The heaviest snow amounts are expected to be in the mountains of Grand and Jackson counties, with lesser amounts in North Park and Middle Park. Snow amounts will be lower in Summit County, but blowing and drifting snow will still make travel difficult overnight. Another storm system will bring more snow to the mountains Thursday evening through Friday morning with additional snowfall of 4 to 8 inches. COZ031-033-141145- /O.CON.KBOU.WS.W.0003.000000T0000Z-190214T1800Z/ /O.CON.KBOU.WW.Y.0012.190215T0300Z-190215T1600Z/ Rabbit Ears Pass- Rocky Mountain National Park and the Medicine Bow Range- Including the cities of East Slopes Park and Northern Gore Ranges, Gore Pass, Rabbit Ears Pass, Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, and Willow Creek Pass 845 PM MST Wed Feb 13 2019 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THURSDAY TO 9 AM MST FRIDAY... * WHAT...Heavy snow at times. Total snow accumulations of 8 to 14 inches expected through Thursday morning. Winds gusting as high as 70 mph tonight. * WHERE...Rabbit Ears Pass and Rocky Mountain National Park and the Medicine Bow Range. Increasing moisture moving into Colorado this afternoon and tonight will combine with the strong winds aloft to produce moderate to heavy snowfall. * WHEN...For the Winter Storm Warning, until 11 AM MST Thursday. For the Winter Weather Advisory, from 8 PM Thursday to 9 AM MST Friday. * ADDITIONAL DETAILS...Travel could be very difficult to impossible. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the morning or evening commute. Very strong winds could cause extensive tree damage. Increasing moisture moving into Colorado this afternoon and tonight will combine with the strong winds aloft to produce moderate to heavy snowfall. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions will make travel very hazardous or impossible. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. Increasing moisture moving into Colorado this afternoon and tonight will combine with the strong winds aloft to produce moderate to heavy snowfall. A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Expect snow covered roads and limited visibilities, and use caution while driving. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ COZ034-141145- /O.CON.KBOU.WW.Y.0011.000000T0000Z-190214T1800Z/ /O.CON.KBOU.WW.Y.0012.190215T0300Z-190215T1600Z/ The Mountains of Summit County, the Mosquito Range, and the Indian Peaks- Including the cities of Berthoud Pass, Breckenridge, East Slopes Mosquito Range, East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Evans, Williams Fork Mountains, and Winter Park 845 PM MST Wed Feb 13 2019 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THURSDAY... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THURSDAY TO 9 AM MST FRIDAY... * WHAT...occasional snow expected. Total snow accumulations of 4 to 8 inches expected through Thursday morning. Winds gusting as high as 65 mph tonight. * WHERE...The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...For the Winter Weather Advisory, until 11 AM MST Thursday. For the Winter Weather Advisory, from 8 PM Thursday to 9 AM MST Friday. * ADDITIONAL DETAILS...Travel could be very difficult. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the morning or evening commute. Very strong winds could cause extensive tree damage. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Expect snow covered roads and limited visibilities, and use caution while driving. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
030 WWUS45 KBOU 141159 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 459 AM MST Thu Feb 14 2019 ...SNOW CONTINUING IN THE MOUNTAINS THIS MORNING... ...MORE SNOW EXPECTED TONIGHT AFTER AN AFTERNOON LULL... .Abundant moisture moving into Colorado has combined with a very strong upper level jet stream to produce moderate to heavy snowfall in the mountains overnight. The snowmaking process is expected to remain in place through this morning, producing several more inches of fresh snowfall in the mountains. Along with the heavy snow, gusty winds will create areas of blowing and drifting snow, with poor visibilities. Later today, the upper level jet stream will move northward over Wyoming and snowfall rates over the Colorado mountains will decrease somewhat. Later this evening though, an additional surge of moisture moving in from the southwestern United States is expected to increase snowfall rates again. Wintery driving conditions will prevail across the north central Colorado mountains for the next couple days. Motorists in the high country should be prepared and equipped to handle the slippery road conditions they will face. COZ031-033-142000- /O.CON.KBOU.WS.W.0003.000000T0000Z-190214T1800Z/ /O.CON.KBOU.WW.Y.0012.190215T0300Z-190215T1600Z/ Rabbit Ears Pass- Rocky Mountain National Park and the Medicine Bow Range- Including the cities of East Slopes Park and Northern Gore Ranges, Gore Pass, Rabbit Ears Pass, Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, and Willow Creek Pass 459 AM MST Thu Feb 14 2019 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 9 AM MST FRIDAY... * WHAT...Heavy snow at times. Total snow accumulations of 10 to 16 inches expected through late this morning. Winds gusting 40 to 50 MPH will cause poor visibilities due to blowing and drifting snow. An additional 4 to 8 inches of snow is expected later tonight as another storm system moves into the state. * WHERE...Rabbit Ears Pass, Rocky Mountain National Park and the Medicine Bow Range. * WHEN...Winter Storm Warning until 11 AM MST Thursday. Winter Weather Advisory from 8 PM tonight to 9 AM MST Friday. * ADDITIONAL DETAILS...Travel could be very difficult to impossible. Areas blowing snow could significantly reduce visibility. The hazardous conditions will impact the morning drive time. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Storm Warning for snow means severe winter weather conditions will make travel very hazardous or impossible. If you must travel, keep an extra flashlight, food and water in your vehicle in case of an emergency. A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Expect snow covered roads and limited visibilities, and use caution while driving. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ COZ034-142000- /O.CON.KBOU.WW.Y.0011.000000T0000Z-190214T1800Z/ /O.CON.KBOU.WW.Y.0012.190215T0300Z-190215T1600Z/ The Mountains of Summit County, the Mosquito Range, and the Indian Peaks- Including the cities of Berthoud Pass, Breckenridge, East Slopes Mosquito Range, East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Evans, Williams Fork Mountains, and Winter Park 459 AM MST Thu Feb 14 2019 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 11 AM MST THIS MORNING... ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 9 AM MST FRIDAY... * WHAT...Occasional snow expected. Total snow accumulations of 5 to 10 inches expected through late this morning. Winds gusting 40 to 50 MPH this morning. After a period of light snow this afternoon, an increase in snowfall is expected through the evening. Additional snow amounts of 4 to 8 inches are expected. * WHERE...The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...Initial Winter Weather Advisory until 11 AM MST today. A second Winter Weather Advisory will be in effect from 8 PM tonight through 9 AM MST Friday. * ADDITIONAL DETAILS...Travel could be very difficult. Patchy blowing snow could significantly reduce visibility. The hazardous conditions could impact the morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Expect snow covered roads and limited visibilities, and use caution while driving. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
572 WWUS45 KBOU 141749 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 1049 AM MST Thu Feb 14 2019 ...MORE SNOW EXPECTED TONIGHT... .Snow will increase again this evening as a strong Pacific jet stream brings another round of abundant moisture to Colorado. Wintery driving conditions will prevail across the north central Colorado mountains into Friday. Motorists in the high country should be prepared and equipped to handle the slippery road conditions they will face. Snow will decrease and come to an end Friday morning. This will be short-lived though as the next Pacific storm system is expected to bring more snow to the mountains late Friday night and Saturday. COZ031-033-150200- /O.EXP.KBOU.WS.W.0003.000000T0000Z-190214T1800Z/ /O.CON.KBOU.WW.Y.0012.190215T0300Z-190215T1600Z/ Rabbit Ears Pass- Rocky Mountain National Park and the Medicine Bow Range- Including the cities of East Slopes Park and Northern Gore Ranges, Gore Pass, Rabbit Ears Pass, Cameron Pass, Laramie and Medicine Bow Mountains, Rabbit Ears Range, Rocky Mountain National Park, and Willow Creek Pass 1049 AM MST Thu Feb 14 2019 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 9 AM MST FRIDAY... ...WINTER STORM WARNING WILL EXPIRE AT 11 AM MST THIS MORNING... * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches expected. Winds gusting as high as 40 mph. * WHERE...Rocky Mountain National Park and the Medicine Bow Range and Rabbit Ears Pass. * WHEN...From 8 PM this evening to 9 AM MST Friday. * ADDITIONAL DETAILS...Travel could be very difficult. Patchy blowing snow could significantly reduce visibility. The hazardous conditions will impact the morning drive time. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Expect snow covered roads and limited visibilities, and use caution while driving. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$ COZ034-150200- /O.EXP.KBOU.WW.Y.0011.000000T0000Z-190214T1800Z/ /O.CON.KBOU.WW.Y.0012.190215T0300Z-190215T1600Z/ The Mountains of Summit County, the Mosquito Range, and the Indian Peaks- Including the cities of Berthoud Pass, Breckenridge, East Slopes Mosquito Range, East Slopes Southern Gore Range, Eisenhower Tunnel, Indian Peaks, Kenosha Mountains, Mount Evans, Williams Fork Mountains, and Winter Park 1049 AM MST Thu Feb 14 2019 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 9 AM MST FRIDAY... ...WINTER WEATHER ADVISORY WILL EXPIRE AT 11 AM MST THIS MORNING... * WHAT...Snow expected. Total snow accumulations of 4 to 8 inches expected. Winds gusting as high as 40 mph. * WHERE...The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...From 8 PM this evening to 9 AM MST Friday. * ADDITIONAL DETAILS...Plan on slippery road conditions. Areas of blowing snow could significantly reduce visibility. The hazardous conditions will impact the morning drive time. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Winter Weather Advisory for snow means periods of snow will cause primarily travel difficulties. Expect snow covered roads and limited visibilities, and use caution while driving. The latest road conditions for the state you are calling from can be obtained by calling 5 1 1. && $$
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 13, 4:24 AM MST, 2 minutes earlier.
Area forecast discussion, Feb 13, 4:24 AM MST, 2 minutes before
Area Forecast Discussion National Weather Service Denver/Boulder CO 424 AM MST Wed Feb 13 2019 .SHORT TERM...(Today and tonight) Issued at 424 AM MST Wed Feb 13 2019 Flow aloft over Colorado is on the increase with satellite imagery also showing a lot of clouds and moisture heading our way. A 100+ knot jet stream overnight is going to be replaced by a 180+ knot jet stream later tonight along with a surge of Pacific moisture that has been producing heavy snows in the Sierra Nevada for the past couple days. These two ingredients will make for a very active next 24 hours in the Colorado mountains. Winds have been blowing over ridges and passes overnight and will be continuing through today. The High Wind Warning will remain in place through midnight. When the Pacific moisture arrives this evening, moderate to heavy snow is expected, especially to the north of the Interstate 70 corridor. Short and medium range model runs from overnight have been showing an increasing trend in the mountain QPF amounts. It looks like zones 31 and 33 could see snow falling at rates of 1 to 2 inches per hour overnight with accumulations up to a foot by midday Thursday, when a lull in snowfall is expected. Zone 34 will see lesser amounts. Will issue a Winter Storm Warning for zones 31 and 33 and and Winter Weather Advisory for zone 34. Moderate to heavy snow along with the continuing winds should make for poor travelling conditions overnight and Thursday morning. On the plains it will be dry and mild, albeit a little breezy due to the strong winds aloft. No precipitation is expected due to the strong downsloping in the lee of the mountains. Typically windy locations west of Interstate 25 could see gusty winds at times this afternoon, but below High Wind Criteria. A Red flag Warning will be in effect for southern Lincoln County this afternoon, since they will have the warmest temperatures and lowest humidities. .LONG TERM...(Thursday through Tuesday) Issued at 424 AM MST Wed Feb 13 2019 Orographic snow will continue in the mtns on Thu with westerly flow aloft. The heaviest snow will be in the morning hours with lighter snow expected by midday. Across the plains it will be dry, however, a cold front will move across the far nern plains by midday and then move westward into the front range by late aftn. Thus highs will range from the upper 30s over the far northeast corner with 55 to 60 near Denver. For Thu night a disturbance will move across nrn CO with a decent amount of QG ascent. The flow aloft will become more southwest which would favor zns 31 and 33 for the best snowfall with lighter amounts in zn 34. Across the plains the low level flow will be mainly easterly Thu night and as the disturbance and associated QG ascent move across. Thus could lead to a good chc of precip generally north of a Denver to Akron line mainly in the 06z-12z time period. Depending on how things evolve some places could see a few inches of snow. By Fri drier air will spread across the area with westerly flow aloft. Thus expect snow chances will decrease in the mtns. Across the plains there still could be a good chc of snow early Fri morning over the far nern corner with dry conditons expected the rest of the day. As far as highs, readings will range from the 30's over the far nern corner with 50's along the front range. On Sat another disturbance embedded in nearly zonal flow aloft may affect the area bringing more snow to the mtns. QG fields show favorable QG ascent along with rather steep lapse rates as well. Across nern CO there is some disagreement between the ECMWF and GFS. The GFS has a bora type front moving across the plains while the ECMWF has more a northerly component behind the front. In addition the GFS has a drier airmass while the ECMWF has more moisture available to produce some light precip across the far ern plains. As for highs readings will drop back into 40s over nern CO with 30s near the WY-NE border area. By Sun a stg upper level trough will develop over the wrn US and eventually move into the Great Basin by Sun night. Cross-sections show limited moisture over the area so will only mention a chc of snow in the mtns. Across nern CO a cold front will move across the area bringing colder temperatures as readings drop into the upper 20s to mid 30s. For Sun night and Mon the upper level trough over the Great Basin will begin to move eastward as another shot of colder air moves into nern CO. Best QG ascent with this trough is fcst to stay south of the area, however, as another shot of colder air moves into nern CO this may allow for some light upslope driven snow. Highs on Mon will only be in the 20s over the plains. By Tue the upper level trough continues to linger over the area. The ECMWF shows a drier airmass with very little pcpn over the area while the GFS continues to produce some light snow. As for highs readings will continue well below normal. && .AVIATION...(For the 12Z TAFS through 12Z Thursday morning) Issued at 424 AM MST Wed Feb 13 2019 VFR conditions with varying amounts of middle and high level moisture and mountain wave conditions through the period. Light south to southeast winds this morning will shift shift to westerly by mid to late morning as the boundary layer deepens and the momentum from the strong flow aloft mixes to the surface. Main impact will be an amplifying mountain wave that leads to strong and gusty westerly winds through this afternoon, especially at KBJC with potential gusts up to 40 knots. Expect lighter winds at KDEN, but still up to 30 knots possible. && .BOU WATCHES/WARNINGS/ADVISORIES... Red Flag Warning from noon today to 6 PM MST this evening for COZ247. High Wind Warning until midnight MST tonight for COZ033>036. Winter Weather Advisory from 5 PM this afternoon to 11 AM MST Thursday for COZ034. Winter Storm Warning from 5 PM this afternoon to 11 AM MST Thursday for COZ031-033. && SHORT TERM...Dankers LONG TERM...RPK AVIATION...Dankers
Hazardous weather outlook, Feb 12, 6:29 PM MST, 9 hours 57 minutes before
Hazardous Weather Outlook National Weather Service Denver/Boulder CO 629 PM MST Tue Feb 12 2019 COZ030>051-131300- 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- 629 PM MST Tue Feb 12 2019 ...HIGH WIND WARNING FOR THE HIGH MOUNTAINS AND FOOTHILLS LATE TONIGHT AND THROUGH WEDNESDAY... ...CRITICAL FIRE WEATHER CONDITIONS EXPECTED OVER SOUTHERN LINCOLN COUNTY WEDNESDAY... This hazardous weather outlook is for northeast and north central Colorado. .DAY ONE...Tonight Strong winds will continue to strengthen over the mountains and higher foothills tonight. Peak gusts in these areas will likely reach into the 60 to 80 mph range, with stronger gusts in higher wind prone areas later tonight. For the lower elevations, there may be periods of winds gusting to 40 mph near the foothills late tonight. .DAYS TWO THROUGH SEVEN...Wednesday through Monday Critical fire weather conditions are expected Wednesday over southern Lincoln County as the strong winds will combine with warm and very dry weather as well with dry cured fuels. Outdoor burning of any kind is strongly discouraged. High winds are also expected in the mountains and higher foothills Wednesday into the evening which could make travel difficult for drivers of high profile vehicles. Mountain areas will also see snow increasing Wednesday night as a plume of moisture from the Pacific arrives. Winds will remain strong enough over the higher elevations to produce areas of blowing snow. Additional Pacific moisture is expected to arrive Friday with more snow in the mountains through Saturday. Cool and unsettled weather will continue Sunday and Monday. Light to moderate amounts of snow will come with each surge of moisture that moves over the state. On the plains, temperatures will be mild through Friday, but the weekend will be colder, especially Sunday and Monday. There will also be a chance of snow from Saturday through Monday, after the passage of a cold front. .SPOTTER INFORMATION STATEMENT... Reports of strong winds will be appreciated.
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 12, 6:17 PM MST | Red Flag Warning | BOU | Elbert, Lincoln | 24 hr |
| Feb 13, 4:26 AM MST | Winter Weather Advisory | BOU | Boulder, Clear Creek, Gilpin, Grand, Jefferson, Park and 1 more | 31 hr |
| Feb 13, 2:57 PM MST | Winter Weather Advisory | BOU | Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more | 42 hr |
Nearby
Winter Storm Warnings in Colorado, 2019Every winter storm warning in 2019
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.