Alert archive / Colorado / Wind Chill Advisories in 2021
Wind Chill Advisory 1, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this wind chill advisory at Feb 11, 2021, 1:17 PM MST for 8 counties in Colorado. It took effect at Feb 13, 2021, 12:00 AM MST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Feb 11, 2021, 1:17 PM MST (20:17 UTC)
- In effect from
- Feb 13, 2021, 12:00 AM MST
- Expired
- Feb 11, 2021, 1:45 PM MST
- In force
- Issued by
- NWS Denver/Boulder, CO
Counties Elbert County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 109 km from the middle of the area, began a volume at 20:17 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.
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 8.3 hours before the alert went out and 34 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
- 1436 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 86 m²/s²
- 0-3 km storm-relative helicity
- 269 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
399 WWUS45 KBOU 112017 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 117 PM MST Thu Feb 11 2021 COZ042-044-046-048>051-120700- /O.NEW.KBOU.WC.Y.0001.210213T0700Z-210213T2300Z/ Northeast Weld County-Morgan County-North and Northeast Elbert County Below 6000 Feet/North Lincoln County-Logan County- Washington County-Sedgwick County-Phillips County- Including the cities of Wiggins, Fort Morgan, Hugo, Otis, Julesburg, Sedgwick, Briggsdale, Sterling, Pawnee Buttes, Cope, Akron, Raymer, Amherst, Ovid, Matheson, Peetz, Grover, Agate, Haxtun, Last Chance, Goodrich, Stoneham, Crook, Holyoke, Brush, Limon, and Merino 117 PM MST Thu Feb 11 2021 ...WIND CHILL ADVISORY IN EFFECT FROM MIDNIGHT FRIDAY NIGHT TO 4 PM MST SATURDAY... * WHAT...Very cold wind chills expected. Wind chills as low as 20 below zero. * WHERE...Portions of east central and northeast Colorado. * WHEN...From Midnight Friday Night to 4 PM MST Saturday. * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. Frostbite and hypothermia are possible if precautions are not taken. PRECAUTIONARY/PREPAREDNESS ACTIONS... The combination of wind and cold temperatures will create dangerously low wind chill values. If you go outside, cover all parts of your body, especially your head, face, and hands. Pets are also susceptible to the extremely cold weather. Keep pets indoors as much as possible. If this is not possible, make sure outdoor pets have a warm, dry shelter, and provide sufficient food and fresh water. && $$ COZ031-120700- /O.CON.KBOU.WW.Y.0010.210212T0000Z-210213T1200Z/ West Jackson and West Grand Counties Above 9000 Feet- Including the cities of Mt Zirkel 117 PM MST Thu Feb 11 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST SATURDAY... * WHAT...Snow expected. Total snow accumulations between 10 to 18 inches. Winds gusting as high as 35 mph. * WHERE...Rabbit Ears Pass. * WHEN...From 5 PM this afternoon to 5 AM MST Saturday. * IMPACTS...Travel could be very difficult to impossible. Roads will become slippery in spots, especially through mountain passes. Use caution when traveling. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org && $$ COZ033-120700- /O.CON.KBOU.WW.Y.0010.210212T0000Z-210213T1200Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet- Including the cities of Laramie and Medicine Bow Mountains, Rabbit Ears Range, Cameron Pass, Rocky Mountain National Park, and Willow Creek Pass 117 PM MST Thu Feb 11 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST SATURDAY... * WHAT...Snow expected. Total snow accumulations between 6 to 12 inches. Winds gusting as high as 40 mph. * WHERE...Rocky Mountain National Park and the Medicine Bow Range. * WHEN...From 5 PM this afternoon to 5 AM MST Saturday. * IMPACTS...Travel could be very difficult. Snow covered roads will make travel hazardous. 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 Slow down and use caution while traveling. Allow extra time to reach your destination. && $$ For more information from the National Weather Service, visit https://weather.gov/bou Cooper
1 follow-up statement
429 WWUS45 KBOU 112045 WSWBOU URGENT - WINTER WEATHER MESSAGE National Weather Service Denver CO 145 PM MST Thu Feb 11 2021 COZ042-044-046-048>051-120600- /O.CAN.KBOU.WC.Y.0001.210213T0700Z-210213T2300Z/ /O.NEW.KBOU.WC.Y.0002.210212T0700Z-210212T2300Z/ Northeast Weld County-Morgan County-North and Northeast Elbert County Below 6000 Feet/North Lincoln County-Logan County- Washington County-Sedgwick County-Phillips County- Including the cities of Wiggins, Fort Morgan, Hugo, Otis, Julesburg, Sedgwick, Briggsdale, Sterling, Pawnee Buttes, Cope, Akron, Raymer, Amherst, Ovid, Matheson, Peetz, Grover, Agate, Haxtun, Last Chance, Goodrich, Stoneham, Crook, Holyoke, Brush, Limon, and Merino 145 PM MST Thu Feb 11 2021 ...WIND CHILL ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 4 PM MST FRIDAY... * WHAT...Very cold wind chills expected. Wind chills as low as 20 below zero. * WHERE...Portions of east central and northeast Colorado. * WHEN...From midnight tonight through 4 pm MST on Friday * IMPACTS...The dangerously cold wind chills could cause frostbite on exposed skin in as little as 30 minutes. Frostbite and hypothermia are possible if precautions are not taken. PRECAUTIONARY/PREPAREDNESS ACTIONS... The combination of wind and cold temperatures will create dangerously low wind chill values. If you go outside, cover all parts of your body, especially your head, face, and hands. Pets are also susceptible to the extremely cold weather. Keep pets indoors as much as possible. If this is not possible, make sure outdoor pets have a warm, dry shelter, and provide sufficient food and fresh water. && $$ COZ031-120600- /O.CON.KBOU.WW.Y.0010.210212T0000Z-210213T1200Z/ West Jackson and West Grand Counties Above 9000 Feet- Including the cities of Mt Zirkel 145 PM MST Thu Feb 11 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST SATURDAY... * WHAT...Snow expected. Total snow accumulations between 10 to 18 inches. Winds gusting as high as 35 mph. * WHERE...Rabbit Ears Pass. * WHEN...From 5 PM this afternoon to 5 AM MST Saturday. * IMPACTS...Travel could be very difficult to impossible. Roads will become slippery in spots, especially through mountain passes. Use caution when traveling. 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 && $$ COZ033-120600- /O.CON.KBOU.WW.Y.0010.210212T0000Z-210213T1200Z/ South and East Jackson/Larimer/North and Northeast Grand/Northwest Boulder Counties Above 9000 Feet- Including the cities of Laramie and Medicine Bow Mountains, Rabbit Ears Range, Cameron Pass, Rocky Mountain National Park, and Willow Creek Pass 145 PM MST Thu Feb 11 2021 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 5 PM THIS AFTERNOON TO 5 AM MST SATURDAY... * WHAT...Snow expected. Total snow accumulations between 6 to 12 inches. Winds gusting as high as 40 mph. * WHERE...Rocky Mountain National Park and the Medicine Bow Range. * WHEN...From 5 PM this afternoon to 5 AM MST Saturday. * IMPACTS...Travel could be very difficult. Snow covered roads will make travel hazardous. PRECAUTIONARY/PREPAREDNESS ACTIONS... Slow down and use caution while traveling. The latest road conditions for Colorado can be obtained by calling 5 1 1 or by going to www.cotrip.org Slow down and use caution while traveling. Allow extra time to reach your destination. && $$ For more information from the National Weather Service, visit https://weather.gov/bou Entrekin
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 11, 4:10 AM MST | Winter Weather Advisory | BOU | Boulder, Grand, Jackson, Larimer | 49 hr |
| Feb 11, 1:45 PM MST | Wind Chill Advisory | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 10 more | 4 days |
Nearby
Wind Chill Advisories in Colorado, 2021Every wind chill advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.