Alert archive / Colorado / Winter Storm Warnings in 2021
Winter Storm Warning 7, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this winter storm warning at Apr 27, 2021, 3:16 AM MDT for 9 counties in Colorado. It took effect at Apr 27, 2021, 12:00 PM MDT. It was in force for 22 hr. 48 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
- Apr 27, 2021, 3:16 AM MDT (09:16 UTC)
- In effect from
- Apr 27, 2021, 12:00 PM MDT
- Expired
- Apr 28, 2021, 9:44 AM MDT
- In force
- 22 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Boulder County, CO, Clear Creek 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), 102 km from the middle of the area, began a volume at 09:17 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 |
|---|---|---|---|
| Apr 28, 5:14 AM MDT | SNOW 4.4 | 1 W Aspen Springs, CO | |
| Apr 28, 5:20 AM MDT | SNOW 3 | 1 Nnw Genesee, CO | |
| Apr 28, 5:30 AM MDT | SNOW 1.5 | Wah Keeney Park, CO | COCORAHS STATION CO-JF-484 EVERGREEN 1.8 N. |
| Apr 28, 6:00 AM MDT | SNOW 2.5 | 3 Sse Silver Plume, CO | CO-OP OBSERVER STATION GCRC2 GEORGETOWN 4 S. |
| Apr 28, 6:01 AM MDT | SNOW 10.3 | 4 Ene Nederland, CO | |
| Apr 28, 6:25 AM MDT | SNOW 9 | 3 Sse Pinecliffe, CO | SNOW STILL FALLING AT THE TIME OF THE REPORT. |
| Apr 28, 6:30 AM MDT | SNOW 3.2 | 2 Sw Golden, CO | COCORAHS STATION CO-JF-497 GOLDEN 1.6 SW. |
| Apr 28, 6:32 AM MDT | SNOW 13 | 2 W Jamestown, CO | |
| Apr 28, 7:00 AM MDT | SNOW 2.5 | 1 Sw Tiny Town, CO | COCORAHS STATION CO-JF-537 MORRISON 5.4 SSW. |
| Apr 28, 7:00 AM MDT | SNOW 7.6 | 2 S Estes Park, CO | COCORAHS STATION CO-LR-767 ESTES PARK 1.8 S. |
| Apr 28, 8:05 AM MDT | SNOW 1 | 1 Nne Rabbit Ears Pass, CO | COLUMBINE SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 1 | 4 Se Mount Zirkel, CO | ZIRKEL SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 1 | 5 Ssw Glendevey, CO | RAWAH SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 1 | 5 Wsw Guanella Pass, CO | JACKWHACKER GULCH SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 1 | 9 Se Weston Pass, CO | ROUGH AND TUMBLE SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 2 | 10 Nne Silverthorne, CO | MIDDLE FORK CAMP SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 2 | 1 Wnw Loveland Pass, CO | LOVELAND BASIN SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 2 | 7 E Blue River, CO | MICHIGAN CREEK SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 2 | 8 Sse Cameron Pass, CO | PHANTOM VALLEY SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 2 | 9 Sse Gould, CO | NEVER SUMMER SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 3 | 11 S Rabbit Ears Pass, CO | BUFFALO PARK SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 3 | 1 Nw Climax, CO | FREMONT PASS SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 3 | 1 W Copper Mountain, CO | COPPER MOUNTAIN SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 4 | 1 Nnw Berthoud Pass, CO | BERTHOUD SUMMIT SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 4 | 3 Wnw Alma, CO | BUCKSKIN JOE SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 5 | 1 Ne Echo Lake, CO | ECHO LAKE SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 5 | 6 W Arapahoe Peak, CO | HIGH LONESOME SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 5 | 7 Sse Cameron Pass, CO | LAKE IRENE SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | SNOW 5 | 8 Sse Rand, CO | WILLOW CREEK PASS SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 6 | 1 Sw Eldora, CO | LAKE ELDORA SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 6 | 5 Ssw Blue River, CO | HOOSIER PASS SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 6 | 6 Nw Silverthorne, CO | SUMMIT RANCH SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 7 | 5 W Berthoud Falls, CO | JONES PASS SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 7 | 9 Sse Spicer, CO | ARAPAHO RIDGE SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 8 | 1 Sse Loveland Pass, CO | GRIZZLY PEAK SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 8 | 3 S Brainard Lake, CO | UNIVERSITY CAMP SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 8 | 5 W Green Mountain Rese, CO | ELLIOT RIDGE SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 9 | 3 Sw Ward, CO | NIWOT SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 11 | 1 Nnw Cameron Pass, CO | JOE WRIGHT SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 11 | 4 S Longs Peak, CO | WILD BASIN SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 11 | 8 Nw Glendevey, CO | ROACH SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 12 | 3 Sw Meeker Park, CO | COPELAND LAKE SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 12 | 7 Nw Red Feather Lakes, CO | BLACK MOUNTAIN SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 14 | 3 Nne Mount Audubon, CO | SAWTOOTH SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 14 | 9 Se Cameron Pass, CO | WILLOW PARK SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 16 | 3 Wnw Pingree Park, CO | HOURGLASS LAKE SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 16 | 4 Nnw Longs Peak, CO | BEAR LAKE SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
| Apr 28, 8:05 AM MDT | HEAVY SNOW 16 | 9 E Glendevey, CO | DEADMAN HILL SNOTEL SNOWFALL BETWEEN 12 PM 04/27/2021 AND 6 AM 04/28/2021 ESTIMATED USING A 10 TO 1 SNOW-TO-LIQUID RATIO |
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 00:00Z, 9.3 hours before the alert went out and 213 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
- 4461 m above ground
- 0-6 km bulk shear
- 64 kt
- 0-1 km storm-relative helicity
- 15 m²/s²
- 0-3 km storm-relative helicity
- 109 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
134 WWUS45 KBOU 270916 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 316 AM MDT Tue Apr 27 2021 COZ033-034-272130- /O.UPG.KBOU.WS.A.0004.210427T1800Z-210428T1800Z/ /O.NEW.KBOU.WS.W.0007.210427T1800Z-210428T1800Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of East Slopes Mosquito Range, Indian Peaks, Eisenhower Tunnel, Rocky Mountain National Park, East Slopes Southern Gore Range, Mount Evans, Laramie and Medicine Bow Mountains, Cameron Pass, Breckenridge, Kenosha Mountains, Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit Ears Range, and Berthoud Pass 316 AM MDT Tue Apr 27 2021 ...WINTER STORM WARNING IN EFFECT FROM NOON TODAY TO NOON MDT WEDNESDAY FRONT RANGE MOUNTAINS ABOVE 9000 FEET... * WHAT...Heavy snow possible. Total snow accumulations of 7 to 14 inches possible. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...From Noon today to Noon MDT Wednesday. * IMPACTS...Roads will likely become slick and hazardous. Travel could be very difficult. The hazardous conditions could impact the Tuesday evening and Wednesday morning commutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... Roads will be slick resulting in slow and hazardous travel. Allow extra time to reach your destination. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip. org && $$ COZ035-272130- /O.UPG.KBOU.WS.A.0004.210428T0000Z-210428T1800Z/ /O.NEW.KBOU.WS.W.0007.210428T0000Z-210428T1800Z/ Larimer and Boulder Counties Between 6000 and 9000 Feet- Including the cities of Red Feather Lakes, Glendevey, Nederland, and Estes Park 316 AM MDT Tue Apr 27 2021 ...WINTER STORM WARNING IN EFFECT FROM 6 PM THIS EVENING TO NOON MDT WEDNESDAY... * WHAT...Heavy snow possible. Total snow accumulations of 6 to 12 inches possible mainly above 7500 feet. * WHERE...The Northern Front Range Foothills. * WHEN...From 6 PM this evening to Noon MDT Wednesday. * IMPACTS...Roads will likely become slick and hazardous. Travel could be very difficult. PRECAUTIONARY/PREPAREDNESS ACTIONS... Roads will be slick resulting in slow and hazardous travel. Allow extra time to reach your destination. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip. org && $$ For more information from the National Weather Service, visit https://weather.gov/bou Meier
4 follow-up statements
903 WWUS45 KBOU 272008 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 208 PM MDT Tue Apr 27 2021 COZ033-034-280415- /O.CON.KBOU.WS.W.0007.000000T0000Z-210428T1800Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of East Slopes Mosquito Range, Indian Peaks, Eisenhower Tunnel, Rocky Mountain National Park, East Slopes Southern Gore Range, Mount Evans, Laramie and Medicine Bow Mountains, Cameron Pass, Breckenridge, Kenosha Mountains, Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit Ears Range, and Berthoud Pass 208 PM MDT Tue Apr 27 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT WEDNESDAY FRONT RANGE MOUNTAINS ABOVE 9000 FEET... * WHAT...Heavy snow expected. Total snow accumulations of 7 to 14 inches possible. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...Until Noon MDT Wednesday. * IMPACTS...Roads will likely become slick and hazardous. The hazardous conditions could impact the Tuesday evening and Wednesday morning commutes. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you 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 Roads will be slick resulting in slow and hazardous travel. Allow extra time to reach your destination. && $$ COZ035-280415- /O.CON.KBOU.WS.W.0007.210428T0000Z-210428T1800Z/ Larimer and Boulder Counties Between 6000 and 9000 Feet- Including the cities of Red Feather Lakes, Glendevey, Nederland, and Estes Park 208 PM MDT Tue Apr 27 2021 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 6 PM THIS EVENING TO NOON MDT WEDNESDAY... * WHAT...Heavy snow expected. Total snow accumulations of 6 to 12 inches possible, mainly above 7500 feet. * WHERE...The Northern Front Range Foothills. * WHEN...From 6 PM this evening to Noon MDT Wednesday. * IMPACTS...Roads will likely become slick and hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip. org Roads will be slick resulting in slow and hazardous travel. Allow extra time to reach your destination. && $$ COZ036-280415- /O.NEW.KBOU.WW.Y.0027.210428T0300Z-210428T1800Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Including the cities of Evergreen, Georgetown, Westcreek, Central City, Idaho Springs, and Bailey 208 PM MDT Tue Apr 27 2021 ...WINTER WEATHER ADVISORY IN EFFECT FROM 9 PM THIS EVENING TO NOON MDT WEDNESDAY... * WHAT...Snow expected. Total snow accumulations 2 to 10 inches, heaviest above 7500 feet. * WHERE...The Southern Front Range Foothills. * WHEN...From 9 PM this evening to Noon MDT Wednesday. * IMPACTS...Travel could be slick and hazardous. This could include the Wednesday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org && $$ For more information from the National Weather Service, visit https://weather.gov/bou Barjenbruch
258 WWUS45 KBOU 280331 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 931 PM MDT Tue Apr 27 2021 COZ033-034-281145- /O.CON.KBOU.WS.W.0007.000000T0000Z-210428T1800Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of East Slopes Mosquito Range, Indian Peaks, Eisenhower Tunnel, Rocky Mountain National Park, East Slopes Southern Gore Range, Mount Evans, Laramie and Medicine Bow Mountains, Cameron Pass, Breckenridge, Kenosha Mountains, Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit Ears Range, and Berthoud Pass 931 PM MDT Tue Apr 27 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT WEDNESDAY FRONT RANGE MOUNTAINS ABOVE 9000 FEET... * WHAT...Heavy snow expected. Total snow accumulations of 7 to 14 inches possible. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...Until Noon MDT Wednesday. * IMPACTS...Roads will likely become slick and hazardous. Travel could be very difficult. The hazardous conditions could impact the Wednesday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you must travel, keep an extra flashlight, food, and water in your vehicle in case of an emergency. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip. org Roads will be slick resulting in slow and hazardous travel. Allow extra time to reach your destination. && $$ COZ035-281145- /O.CON.KBOU.WS.W.0007.000000T0000Z-210428T1800Z/ Larimer and Boulder Counties Between 6000 and 9000 Feet- Including the cities of Red Feather Lakes, Glendevey, Nederland, and Estes Park 931 PM MDT Tue Apr 27 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT WEDNESDAY... * WHAT...Heavy snow expected. Total snow accumulations of 6 to 12 inches possible, mainly above 7500 feet. * WHERE...The Northern Front Range Foothills. * WHEN...Until Noon MDT Wednesday. * IMPACTS...Roads will likely become slick and hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... If you 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 Roads will be slick resulting in slow and hazardous travel. Allow extra time to reach your destination. && $$ COZ036-281145- /O.CON.KBOU.WW.Y.0027.000000T0000Z-210428T1800Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Including the cities of Evergreen, Georgetown, Westcreek, Central City, Idaho Springs, and Bailey 931 PM MDT Tue Apr 27 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT WEDNESDAY... * WHAT...Snow expected. Total snow accumulations 2 to 10 inches, heaviest above 7500 feet. * WHERE...The Southern Front Range Foothills. * WHEN...Until Noon MDT Wednesday. * IMPACTS...Travel could be slick and hazardous. This could include the Wednesday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org && $$ For more information from the National Weather Service, visit https://weather.gov/bou Kriederman
697 WWUS45 KBOU 280913 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 313 AM MDT Wed Apr 28 2021 COZ033-034-281800- /O.CON.KBOU.WS.W.0007.000000T0000Z-210428T1800Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet- Including the cities of East Slopes Mosquito Range, Indian Peaks, Eisenhower Tunnel, Rocky Mountain National Park, East Slopes Southern Gore Range, Mount Evans, Laramie and Medicine Bow Mountains, Cameron Pass, Breckenridge, Kenosha Mountains, Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit Ears Range, and Berthoud Pass 313 AM MDT Wed Apr 28 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TODAY FRONT RANGE MOUNTAINS ABOVE 9000 FEET... * WHAT...Heavy snow expected. Total snow accumulations of 7 to 14 inches possible. * WHERE...Rocky Mountain National Park and the Medicine Bow Range, and The Mountains of Summit County, the Mosquito Range, and the Indian Peaks. * WHEN...Until Noon MDT today. * IMPACTS...Roads are slick and hazardous in places. Plan on slippery road conditions this morning. The hazardous conditions will impact the Wednesday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Roads will be slick resulting in slow and hazardous travel. Allow extra time to reach your destination. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip. org && $$ COZ035-281800- /O.CON.KBOU.WS.W.0007.000000T0000Z-210428T1800Z/ Larimer and Boulder Counties Between 6000 and 9000 Feet- Including the cities of Red Feather Lakes, Glendevey, Nederland, and Estes Park 313 AM MDT Wed Apr 28 2021 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL NOON MDT TODAY... * WHAT...Heavy snow expected. Total snow accumulations of 6 to 12 inches possible, mainly above 7500 feet. * WHERE...The Northern Front Range Foothills. * WHEN...Until Noon MDT today. * IMPACTS...Roads are slick and hazardous in places. Plan on slippery road conditions this morning. PRECAUTIONARY/PREPAREDNESS ACTIONS... Roads will be slick resulting in slow and hazardous travel. Allow extra time to reach your destination. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip. org && $$ COZ036-281800- /O.CON.KBOU.WW.Y.0027.000000T0000Z-210428T1800Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Including the cities of Evergreen, Georgetown, Westcreek, Central City, Idaho Springs, and Bailey 313 AM MDT Wed Apr 28 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL NOON MDT TODAY... * WHAT...Snow expected. Total snow accumulations 2 to 10 inches, heaviest above 7500 feet. * WHERE...The Southern Front Range Foothills. * WHEN...Until Noon MDT today. * IMPACTS...Roads are slick and hazardous in places. Plan on slippery road conditions this morning. The hazardous conditions will impact the Wednesday morning commute. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org && $$ For more information from the National Weather Service, visit https://weather.gov/bou Meier
266 WWUS45 KBOU 281544 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 944 AM MDT Wed Apr 28 2021 COZ033>035-281645- /O.CAN.KBOU.WS.W.0007.000000T0000Z-210428T1800Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet-South and Southeast Grand/West Central and Southwest Boulder/Gilpin/Clear Creek/Summit/North and West Park Counties Above 9000 Feet-Larimer and Boulder Counties Between 6000 and 9000 Feet- Including the cities of Glendevey, East Slopes Mosquito Range, Estes Park, Indian Peaks, Nederland, Eisenhower Tunnel, Rocky Mountain National Park, East Slopes Southern Gore Range, Mount Evans, Laramie and Medicine Bow Mountains, Red Feather Lakes, Cameron Pass, Breckenridge, Kenosha Mountains, Winter Park, Williams Fork Mountains, Willow Creek Pass, Rabbit Ears Range, and Berthoud Pass 944 AM MDT Wed Apr 28 2021 ...WINTER STORM WARNING IS CANCELLED... Heavy snow has ended. Only scattered light showers can be expected through the rest of today. $$ COZ036-281645- /O.CAN.KBOU.WW.Y.0027.000000T0000Z-210428T1800Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Including the cities of Evergreen, Georgetown, Westcreek, Central City, Idaho Springs, and Bailey 944 AM MDT Wed Apr 28 2021 ...WINTER WEATHER ADVISORY IS CANCELLED... Snow will continue to diminish. Only scattered light showers can be expected through the rest of today. $$ For more information from the National Weather Service, visit https://weather.gov/bou Barjenbruch
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 27, 1:52 AM MDT | Severe Thunderstorm Warning | BOU | Washington | 23 min |
| Apr 27, 11:35 AM MDT | Special Weather Statement | BOU | Douglas | 25 min |
| Apr 27, 11:55 AM MDT | Special Weather Statement | BOU | Elbert | 50 min |
| Apr 27, 11:59 AM MDT | Special Weather Statement | BOU | Denver | 31 min |
| Apr 27, 12:49 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Weld | 26 min |
| Apr 27, 1:15 PM MDT | Special Weather Statement | BOU | Adams | 45 min |
| Apr 27, 1:51 PM MDT | Special Weather Statement | BOU | Lincoln | 39 min |
| Apr 27, 1:53 PM MDT | Special Weather Statement | BOU | Weld | 37 min |
| Apr 27, 1:59 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 31 min |
| Apr 27, 2:02 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 28 min |
| Apr 27, 2:08 PM MDT | Winter Weather Advisory | BOU | Clear Creek, Douglas, Gilpin, Jefferson, Park | 20 hr |
| Apr 27, 2:23 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 52 min |
| Apr 27, 2:43 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Morgan | 32 min |
| Apr 27, 2:49 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 41 min |
| Apr 27, 3:00 PM MDT | Special Weather Statement | BOU | Lincoln | 45 min |
| Apr 27, 3:10 PM MDT | Special Weather Statement | BOU | Morgan | 20 min |
| Apr 27, 3:13 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Morgan, Washington | 32 min |
| Apr 27, 3:28 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 47 min |
| Apr 27, 3:32 PM MDT | Special Weather Statement | BOU | Morgan | 28 min |
| Apr 27, 3:41 PM MDT | Tornado Warning | BOU | Lincoln | 34 min |
| Apr 27, 4:12 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 33 min |
| Apr 27, 4:16 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Morgan, Washington | 17 min |
| Apr 27, 4:36 PM MDT | Tornado Warning | BOU | Lincoln | 24 min |
| Apr 27, 5:19 PM MDT | Severe Thunderstorm Warning | BOU | Washington | 26 min |
| Apr 27, 5:51 PM MDT | Special Weather Statement | BOU | Phillips | 24 min |
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.