Alert archive / Colorado / Winter Storm Warnings in 2021
Winter Storm Warning 9, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this winter storm warning at May 9, 2021, 2:19 PM MDT for 10 counties in Colorado. It took effect at May 10, 2021, 9:48 AM MDT. It was in force for 32 hr. 34 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- May 9, 2021, 2:19 PM MDT (20:19 UTC)
- In effect from
- May 10, 2021, 9:48 AM MDT
- Expired
- May 11, 2021, 6:00 PM MDT
- In force
- 32 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Boulder County, CO, Clear Creek County, CO, Douglas County, CO, Gilpin County, CO, Grand County, CO, Jackson County, CO, Jefferson County, CO, Larimer County, CO, Park County, CO, Summit County, CO
The radar
The Denver radar (KFTG), 94 km from the middle of the area, began a volume at 20:19 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| May 10, 4:25 PM MDT | SNOW 0.4 | 1 Ese Loveland, CO | |
| May 10, 5:00 PM MDT | SNOW 1.5 | 2 Nw Fort Collins, CO | |
| May 10, 5:30 PM MDT | SNOW 1.5 | 3 Wsw Fort Collins, CO | |
| May 10, 5:43 PM MDT | SNOW 2 | 1 Ssw Crescent Village, CO | |
| May 10, 6:26 PM MDT | SNOW 4.7 | 1 W Aspen Springs, CO | |
| May 10, 6:56 PM MDT | SNOW 1.4 | Berthoud, CO | |
| May 10, 6:58 PM MDT | SNOW 0.5 | 2 N Longmont, CO | |
| May 10, 7:00 PM MDT | SNOW 1.9 | 2 Nnw Fort Collins, CO | SNOWFALL THROUGH 7PM. |
| May 10, 8:00 PM MDT | SNOW 4.5 | 4 Ene Nederland, CO | |
| May 10, 8:00 PM MDT | SNOW 5 | Berthoud Pass, CO | BERTHOUD SUMMIT SNOTEL. SWE 0.6 INCH. |
| May 10, 8:00 PM MDT | SNOW 6 | 3 Se Brainard Lake, CO | NIWOT SNOTEL. SWE 0.7 INCH. |
| May 10, 8:00 PM MDT | SNOW 6 | 3 Sw Meeker Park, CO | COPELAND LAKE SNOTEL. SWE 0.6 INCH. |
| May 10, 8:00 PM MDT | SNOW 10 | 3 Nne Mt Audubon, CO | SAWTOOTH SNOTEL. SWE 0.9 INCH. |
| May 10, 8:00 PM MDT | SNOW 10 | Bear Lake, CO | BEAR LAKE SNOTEL. SWE 0.8 INCH. |
| May 10, 8:04 PM MDT | SNOW 1.2 | 3 S Fort Collins, CO | |
| May 10, 9:00 PM MDT | SNOW 8 | 1 Nnw Cameron Pass, CO | JOE WRIGHT SNOTEL. SWE 0.6 INCH. |
| May 10, 9:00 PM MDT | SNOW 10 | 4 Wsw Trail Ridge, CO | LAKE IRENE SNOTEL. SWE 1.0 INCH. |
| May 10, 9:00 PM MDT | SNOW 11 | 1 E Trail Ridge, CO | WILLOW PARK SNOTEL. SWE 1.1 INCHES. |
| May 10, 9:10 PM MDT | SNOW 0.7 | 2 N Longmont, CO | |
| May 10, 9:11 PM MDT | SNOW 1.5 | Poudre Park, CO | |
| May 10, 9:30 PM MDT | SNOW 8.8 | Estes Park, CO | |
| May 10, 9:45 PM MDT | SNOW 1.7 | 2 Wsw Louisville, CO | |
| May 10, 10:08 PM MDT | SNOW 4.3 | 2 Sse Breckenridge, CO | 2.0 INCHES SINCE 2 PM. |
| May 10, 10:55 PM MDT | SNOW 1 | 1 Nnw Louisville, CO | |
| May 10, 11:52 PM MDT | SNOW 2.2 | 1 Nne Evergreen, CO | |
| May 11, 3:00 AM MDT | SNOW 5 | 1 Wnw Loveland Pass, CO | LOVELAND BASIN SNOTEL. SWE 0.3 INCH. |
| May 11, 3:00 AM MDT | SNOW 5 | 5 Ssw Blue River, CO | HOOSIER PASS SNOTEL. SWE 0.4 INCHES. |
| May 11, 3:00 AM MDT | SNOW 8 | 4 S Long'S Peak, CO | WILD BASIN SNOTEL. SWE 0.7 INCHES. |
| May 11, 3:00 AM MDT | SNOW 13 | 1 E Trail Ridge, CO | WILLOW PARK SNOTEL. SWE 1.2 INCHES. |
| May 11, 5:55 AM MDT | SNOW 1.1 | 1 Nnw Louisville, CO | |
| May 11, 10:35 AM MDT | SNOW 4 | 1 Nne Estes Park, CO | |
| May 11, 2:00 PM MDT | SNOW 1.5 | 4 Ene Nederland, CO | NEW SNOW IN THE PREVIOUS 90 MINUTES. |
| May 11, 2:19 PM MDT | SNOW 4 | 1 Ssw Crescent Village, CO | |
| May 11, 2:44 PM MDT | SNOW 1.6 | 1 Nne Evergreen, CO |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 8.3 hours before the alert went out and 206 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
- 900 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- -73 m²/s²
- 0-3 km storm-relative helicity
- 304 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
837 WWUS45 KBOU 092019 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 219 PM MDT Sun May 9 2021 COZ033>036-100830- /O.UPG.KBOU.WS.A.0006.210510T1800Z-210511T1800Z/ /O.NEW.KBOU.WS.W.0009.210510T2100Z-210511T2100Z/ 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- Including the cities of Winter Park, Westcreek, Rocky Mountain National Park, Central City, Red Feather Lakes, Breckenridge, Bailey, Williams Fork Mountains, Evergreen, Georgetown, Glendevey, Indian Peaks, Nederland, Eisenhower Tunnel, East Slopes Southern Gore Range, Mount Evans, Cameron Pass, East Slopes Mosquito Range, Berthoud Pass, Kenosha Mountains, Estes Park, Willow Creek Pass, Laramie and Medicine Bow Mountains, Idaho Springs, and Rabbit Ears Range 219 PM MDT Sun May 9 2021 ...WINTER STORM WARNING IN EFFECT FROM 3 PM MONDAY TO 3 PM MDT TUESDAY... * WHAT...Heavy snow possible. Total snow accumulations of 8 to 16 inches, with the heaviest snowfall expected above 7500 feet. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, The Mountains of Summit County, the Mosquito Range, and the Indian Peaks, The Northern Front Range Foothills, and The Southern Front Range Foothills. * WHEN...From 3 PM Monday to 3 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday evening and Tuesday morning commutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip. org && $$ For more information from the National Weather Service, visit https://weather.gov/bou Cooper
7 follow-up statements
251 WWUS45 KBOU 100406 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 1006 PM MDT Sun May 9 2021 COZ033>036-101215- /O.CON.KBOU.WS.W.0009.210510T2100Z-210511T2100Z/ 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- Including the cities of Winter Park, Westcreek, Rocky Mountain National Park, Central City, Red Feather Lakes, Breckenridge, Bailey, Williams Fork Mountains, Evergreen, Georgetown, Glendevey, Indian Peaks, Nederland, Eisenhower Tunnel, East Slopes Southern Gore Range, Mount Evans, Cameron Pass, East Slopes Mosquito Range, Berthoud Pass, Kenosha Mountains, Estes Park, Willow Creek Pass, Laramie and Medicine Bow Mountains, Idaho Springs, and Rabbit Ears Range 1006 PM MDT Sun May 9 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 PM MONDAY TO 3 PM MDT TUESDAY... * WHAT...Heavy snow possible. Total snow accumulations of 8 to 16 inches, with the heaviest snowfall expected above 7500 feet. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, The Mountains of Summit County, the Mosquito Range, and the Indian Peaks, The Northern Front Range Foothills, and The Southern Front Range Foothills. * WHEN...From 3 PM Monday to 3 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday evening and Tuesday morning commutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip. org && $$ For more information from the National Weather Service, visit https://weather.gov/bou Entrekin
023 WWUS45 KBOU 101148 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 548 AM MDT Mon May 10 2021 COZ033>036-102100- /O.CON.KBOU.WS.W.0009.210510T2100Z-210511T2100Z/ 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- Including the cities of Winter Park, Westcreek, Rocky Mountain National Park, Central City, Red Feather Lakes, Breckenridge, Bailey, Williams Fork Mountains, Evergreen, Georgetown, Glendevey, Indian Peaks, Nederland, Eisenhower Tunnel, East Slopes Southern Gore Range, Mount Evans, Cameron Pass, East Slopes Mosquito Range, Berthoud Pass, Kenosha Mountains, Estes Park, Willow Creek Pass, Laramie and Medicine Bow Mountains, Idaho Springs, and Rabbit Ears Range 548 AM MDT Mon May 10 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 3 PM THIS AFTERNOON TO 3 PM MDT TUESDAY... * WHAT...Heavy snow possible. Total snow accumulations of 8 to 16 inches, with locally heavier amounts possible and the heaviest snowfall expected above 7500 feet. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, The Mountains of Summit County, the Mosquito Range, and the Indian Peaks, The Northern Front Range Foothills, and The Southern Front Range Foothills. * WHEN...From 3 PM this afternoon to 3 PM MDT Tuesday. * IMPACTS...Travel could be very difficult. The hazardous conditions could impact the Monday evening and Tuesday morning commutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip. org && $$ For more information from the National Weather Service, visit https://weather.gov/bou Direnzo
123 WWUS45 KBOU 101548 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 948 AM MDT Mon May 10 2021 COZ033>036-110400- /O.EXT.KBOU.WS.W.0009.210510T1548Z-210511T2100Z/ 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- Including the cities of Winter Park, Westcreek, Rocky Mountain National Park, Central City, Red Feather Lakes, Breckenridge, Bailey, Williams Fork Mountains, Evergreen, Georgetown, Glendevey, Indian Peaks, Nederland, Eisenhower Tunnel, East Slopes Southern Gore Range, Mount Evans, Cameron Pass, East Slopes Mosquito Range, Berthoud Pass, Kenosha Mountains, Estes Park, Willow Creek Pass, Laramie and Medicine Bow Mountains, Idaho Springs, and Rabbit Ears Range 948 AM MDT Mon May 10 2021 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 3 PM MDT TUESDAY... * WHAT...Heavy snow possible. Total snow accumulations of 8 to 16 inches, with locally heavier amounts possible and the heaviest snowfall expected above 7500 feet. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, The Mountains of Summit County, the Mosquito Range, and the Indian Peaks, The Northern Front Range Foothills, and The Southern Front Range Foothills. * WHEN...Until 3 PM MDT Tuesday. * IMPACTS...Roads will likely become slick and hazardous. Travel could be very difficult. The hazardous conditions could impact the Monday morning and evening commutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip. org && $$ For more information from the National Weather Service, visit https://weather.gov/bou Cooper
278 WWUS45 KBOU 102028 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 228 PM MDT Mon May 10 2021 COZ033>036-110600- /O.CON.KBOU.WS.W.0009.000000T0000Z-210511T2100Z/ 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- Including the cities of Winter Park, Westcreek, Rocky Mountain National Park, Central City, Red Feather Lakes, Breckenridge, Bailey, Williams Fork Mountains, Evergreen, Georgetown, Glendevey, Indian Peaks, Nederland, Eisenhower Tunnel, East Slopes Southern Gore Range, Mount Evans, Cameron Pass, East Slopes Mosquito Range, Berthoud Pass, Kenosha Mountains, Estes Park, Willow Creek Pass, Laramie and Medicine Bow Mountains, Idaho Springs, and Rabbit Ears Range 228 PM MDT Mon May 10 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MDT TUESDAY... * WHAT...Moderate to heavy snow will continue. Additional snow accumulation of 5 to 10 inches by Tuesday afternoon, heaviest in the mountains and foothills of Boulder and Larimer counties above 7500 feet. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, The Mountains of Summit County, the Mosquito Range, and the Indian Peaks, The Northern Front Range Foothills, and The Southern Front Range Foothills. * WHEN...Until 3 PM MDT Tuesday. * IMPACTS...Roads will likely become slick and hazardous. Travel could be very difficult. The hazardous conditions could impact the commutes this evening and Tuesday morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip. org && $$ For more information from the National Weather Service, visit https://weather.gov/bou Cooper
218 WWUS45 KBOU 110338 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 938 PM MDT Mon May 10 2021 COZ033>036-111230- /O.CON.KBOU.WS.W.0009.000000T0000Z-210511T2100Z/ 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- Including the cities of Winter Park, Westcreek, Rocky Mountain National Park, Central City, Red Feather Lakes, Breckenridge, Bailey, Williams Fork Mountains, Evergreen, Georgetown, Glendevey, Indian Peaks, Nederland, Eisenhower Tunnel, East Slopes Southern Gore Range, Mount Evans, Cameron Pass, East Slopes Mosquito Range, Berthoud Pass, Kenosha Mountains, Estes Park, Willow Creek Pass, Laramie and Medicine Bow Mountains, Idaho Springs, and Rabbit Ears Range 938 PM MDT Mon May 10 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 3 PM MDT TUESDAY... * WHAT...Moderate to heavy snow will continue. Additional snow accumulation of 5 to 10 inches expected by Tuesday afternoon, heaviest in the mountains and foothills of Boulder and Larimer counties above 7500 feet. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, The Mountains of Summit County, the Mosquito Range, and the Indian Peaks, The Northern Front Range Foothills, and The Southern Front Range Foothills. * WHEN...Until 3 PM MDT Tuesday. * IMPACTS...Roads will likely become slick and hazardous. Plan on slippery road conditions. The hazardous conditions could impact the Tuesday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip. org && $$ For more information from the National Weather Service, visit https://weather.gov/bou Entrekin
508 WWUS45 KBOU 111003 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 403 AM MDT Tue May 11 2021 COZ033>036-111815- /O.EXT.KBOU.WS.W.0009.000000T0000Z-210512T0000Z/ 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- Including the cities of Winter Park, Westcreek, Rocky Mountain National Park, Central City, Red Feather Lakes, Breckenridge, Bailey, Williams Fork Mountains, Evergreen, Georgetown, Glendevey, Indian Peaks, Nederland, Eisenhower Tunnel, East Slopes Southern Gore Range, Mount Evans, Cameron Pass, East Slopes Mosquito Range, Berthoud Pass, Kenosha Mountains, Estes Park, Willow Creek Pass, Laramie and Medicine Bow Mountains, Idaho Springs, and Rabbit Ears Range 403 AM MDT Tue May 11 2021 ...WINTER STORM WARNING NOW IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...A lull in snowfall will occur this morning. However moderate to heavy snow will redevelop by midday. Additional snow accumulation of 4 to 8 inches expected by 6 pm with the highest amounts above 7500 feet. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, The Mountains of Summit County, the Mosquito Range, and the Indian Peaks, The Northern Front Range Foothills, and The Southern Front Range Foothills. * WHEN...Until 6 PM MDT this evening. * IMPACTS...Roads will likely become slick and hazardous this afternoon. The hazardous conditions could impact this evenings commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip. org && $$ For more information from the National Weather Service, visit https://weather.gov/bou RPK
001 WWUS45 KBOU 111419 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 819 AM MDT Tue May 11 2021 COZ033>036-120000- /O.CON.KBOU.WS.W.0009.000000T0000Z-210512T0000Z/ 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- Including the cities of Winter Park, Westcreek, Rocky Mountain National Park, Central City, Red Feather Lakes, Breckenridge, Bailey, Williams Fork Mountains, Evergreen, Georgetown, Glendevey, Indian Peaks, Nederland, Eisenhower Tunnel, East Slopes Southern Gore Range, Mount Evans, Cameron Pass, East Slopes Mosquito Range, Berthoud Pass, Kenosha Mountains, Estes Park, Willow Creek Pass, Laramie and Medicine Bow Mountains, Idaho Springs, and Rabbit Ears Range 819 AM MDT Tue May 11 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...A lull in snowfall will occur this morning. However moderate to heavy snow will redevelop by midday. Additional snow accumulation of 4 to 8 inches expected by 6 pm with the highest amounts above 7500 feet. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, The Mountains of Summit County, the Mosquito Range, and the Indian Peaks, The Northern Front Range Foothills, and The Southern Front Range Foothills. * WHEN...Until 6 PM MDT this evening. * IMPACTS...Roads will likely become slick and hazardous. Plan on slippery road conditions. The hazardous conditions could impact the commute this evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org && $$ For more information from the National Weather Service, visit https://weather.gov/bou Meier
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 8, 8:22 PM MDT | Special Weather Statement | BOU | Douglas | 38 min |
| May 9, 3:40 AM MDT | Winter Storm Watch | BOU | Boulder, Clear Creek, Douglas, Gilpin, Grand, Jackson and 4 more | 11 hr |
Nearby
Winter Storm Warnings in Colorado, 2021Every winter storm warning in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.