Alert archive / Colorado / Freeze Warnings in 2021
Freeze Warning 1, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this freeze warning at Oct 12, 2021, 9:53 PM MDT for 14 counties in Colorado. It was in force for 10 hr. 6 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
- Oct 12, 2021, 9:53 PM MDT (03:53 UTC)
- Expired
- Oct 13, 2021, 8:00 AM MDT
- In force
- 10 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Jefferson County, CO, Larimer County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Washington County, CO, Weld County, CO
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Oct 13, 6:00 AM MDT | SNOW 0.5 | 2 N Lyons, CO | COCORAHS STATION CO-BO-137 LYONS 1.8 N. |
| Oct 13, 7:00 AM MDT | SNOW 0.5 | 2 S Estes Park, CO | COCORAHS STATION CO-LR-767 ESTES PARK 1.8 S. |
| Oct 13, 7:00 AM MDT | SNOW 1 | 4 Nne Floyd Hill, CO | COCORAHS STATION CO-JF-267 GOLDEN 9.4 WNW. |
| Oct 13, 7:00 AM MDT | SNOW 1.8 | Nederland, CO | COCORAHS STATION CO-BO-92 NEDERLAND .47 ESE. |
| Oct 13, 7:00 AM MDT | SNOW 2 | 1 Ssw Carr, CO | COCORAHS STATION CO-WE-127 CARR 0.6 S. |
| Oct 13, 7:00 AM MDT | SNOW 2.1 | 4 S Cherokee Park, CO | COCORAHS STATION CO-LR-329 RED FEATHER 5.9 NE. |
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, 3.9 hours before the alert went out and 101 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
- 11 J/kg
- Mixed-layer CIN
- -100 J/kg
- Mixed-layer LCL
- 1032 m above ground
- 0-6 km bulk shear
- 84 kt
- 0-1 km storm-relative helicity
- 46 m²/s²
- 0-3 km storm-relative helicity
- -28 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
673 WWUS75 KBOU 130353 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 953 PM MDT Tue Oct 12 2021 COZ042-048-131200- /O.NEW.KBOU.FZ.W.0001.211013T0353Z-211013T1400Z/ /O.CON.KBOU.HW.W.0006.211013T1200Z-211014T0000Z/ Northeast Weld County-Logan County- Including the cities of Sterling, Pawnee Buttes, Stoneham, Crook, Grover, Briggsdale, Merino, Peetz, and Raymer 953 PM MDT Tue Oct 12 2021 ...FREEZE WARNING IN EFFECT UNTIL 8 AM MDT WEDNESDAY... ...HIGH WIND WARNING REMAINS IN EFFECT FROM 6 AM TO 6 PM MDT WEDNESDAY... * WHAT...For the Freeze Warning, sub-freezing temperatures as low as 30 ongoing. For the High Wind Warning, northwest winds 25 to 35 mph with gusts up to 55 mph expected. * WHERE...Logan County and Northeast Weld County Counties. * WHEN...For the Freeze Warning, until 8 AM MDT Wednesday. For the High Wind Warning, from 6 AM to 6 PM MDT Wednesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ COZ038>041-043>046-049-131200- /O.NEW.KBOU.FZ.W.0001.211013T0353Z-211013T1400Z/ Larimer County Below 6000 Feet/Northwest Weld County-Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County-North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County-Elbert/Central and East Douglas Counties Above 6000 Feet-Central and South Weld County-Morgan County-Central and East Adams and Arapahoe Counties-North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Washington County- Including the cities of Wiggins, Fort Morgan, Elbert, Hugo, Roggen, Arvada, Byers, Larkspur, Agate, Leader, Boulder, City of Denver, Cope, Aurora, Littleton, Akron, Last Chance, Brighton, Highlands Ranch, Fort Lupton, Matheson, Loveland, Kiowa, Eaton, Deer Trail, Longmont, Fondis, Denver International Airport, Goodrich, Golden, Parker, Castle Rock, Lakewood, Otis, Fort Collins, Greeley, Bennett, Nunn, Brush, Limon, and Hereford 953 PM MDT Tue Oct 12 2021 ...FREEZE WARNING IN EFFECT UNTIL 8 AM MDT WEDNESDAY... * WHAT...Sub-freezing temperatures as low as 29 ongoing. * WHERE...North and Northeast Elbert County Below 6000 Feet/North Lincoln County, Larimer County Below 6000 Feet/Northwest Weld County, Boulder and Jefferson Counties Below 6000 Feet/West Broomfield County, Central and East Adams and Arapahoe Counties, Central and South Weld County, Elbert/Central and East Douglas Counties Above 6000 Feet, Morgan County, North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County and Washington County Counties. * WHEN...Until 8 AM MDT Wednesday. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ COZ035-131200- /O.CON.KBOU.HW.W.0006.211013T0600Z-211013T1800Z/ Larimer and Boulder Counties Between 6000 and 9000 Feet- Including the cities of Red Feather Lakes, Glendevey, Nederland, and Estes Park 953 PM MDT Tue Oct 12 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL NOON MDT WEDNESDAY... * WHAT...West winds 25 to 35 mph with gusts up to 75 mph expected. * WHERE...Larimer and Boulder Counties Between 6000 and 9000 Feet County. * WHEN...Until Noon MDT Wednesday. $$ COZ050-051-131200- /O.CON.KBOU.HW.W.0006.211013T1200Z-211014T0000Z/ Sedgwick County-Phillips County- Including the cities of Ovid, Holyoke, Julesburg, Amherst, Sedgwick, and Haxtun 953 PM MDT Tue Oct 12 2021 ...HIGH WIND WARNING REMAINS IN EFFECT FROM 6 AM TO 6 PM MDT WEDNESDAY... * WHAT...Northwest winds 25 to 35 mph with gusts up to 55 mph expected. * WHERE...Phillips County and Sedgwick County Counties. * WHEN...From 6 AM to 6 PM MDT Wednesday. $$ For more information from the National Weather Service, visit https://weather.gov/bou Entrekin
2 follow-up statements
509 WWUS75 KBOU 131114 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 514 AM MDT Wed Oct 13 2021 COZ042-048-132000- /O.CON.KBOU.FZ.W.0001.000000T0000Z-211013T1400Z/ /O.CON.KBOU.HW.W.0006.211013T1200Z-211014T0000Z/ Northeast Weld County-Logan County- Including the cities of Sterling, Pawnee Buttes, Stoneham, Crook, Grover, Briggsdale, Merino, Peetz, and Raymer 514 AM MDT Wed Oct 13 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM MDT THIS MORNING... ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...For the Freeze Warning, sub-freezing temperatures as low as 31 ongoing. For the High Wind Warning, northwest winds 30 to 40 mph with gusts up to 60 mph expected. * WHERE...Logan County and Northeast Weld County Counties. * WHEN...For the Freeze Warning, until 8 AM MDT this morning. For the High Wind Warning, until 6 PM MDT this evening. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ COZ038>041-043>046-049-131400- /O.CON.KBOU.FZ.W.0001.000000T0000Z-211013T1400Z/ Larimer County Below 6000 Feet/Northwest Weld County-Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County-North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County-Elbert/Central and East Douglas Counties Above 6000 Feet-Central and South Weld County-Morgan County-Central and East Adams and Arapahoe Counties-North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Washington County- Including the cities of Wiggins, Fort Morgan, Elbert, Hugo, Roggen, Arvada, Byers, Larkspur, Agate, Leader, Boulder, City of Denver, Cope, Aurora, Littleton, Akron, Last Chance, Brighton, Highlands Ranch, Fort Lupton, Matheson, Loveland, Kiowa, Eaton, Deer Trail, Longmont, Fondis, Denver International Airport, Goodrich, Golden, Parker, Castle Rock, Lakewood, Otis, Fort Collins, Greeley, Bennett, Nunn, Brush, Limon, and Hereford 514 AM MDT Wed Oct 13 2021 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM MDT THIS MORNING... * WHAT...Sub-freezing temperatures as low as 29 ongoing. * WHERE...North and Northeast Elbert County Below 6000 Feet/North Lincoln County, Larimer County Below 6000 Feet/Northwest Weld County, Boulder and Jefferson Counties Below 6000 Feet/West Broomfield County, Central and East Adams and Arapahoe Counties, Central and South Weld County, Elbert/Central and East Douglas Counties Above 6000 Feet, Morgan County, North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County and Washington County Counties. * WHEN...Until 8 AM MDT this morning. * IMPACTS...Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. && $$ COZ035-131800- /O.CON.KBOU.HW.W.0006.000000T0000Z-211013T1800Z/ Larimer and Boulder Counties Between 6000 and 9000 Feet- Including the cities of Red Feather Lakes, Glendevey, Nederland, and Estes Park 514 AM MDT Wed Oct 13 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL NOON MDT TODAY... * WHAT...West winds 35 to 45 mph with gusts up to 75 mph ongoing. * WHERE...Larimer and Boulder Counties Between 6000 and 9000 Feet County. * WHEN...Until Noon MDT today. * IMPACTS...Strong winds will blow unsecured objects around. Tree limbs could be blow down and a few power outages my result. Travel will be difficult for high profile vehicles. $$ COZ050-051-132000- /O.CON.KBOU.HW.W.0006.211013T1200Z-211014T0000Z/ Sedgwick County-Phillips County- Including the cities of Ovid, Holyoke, Julesburg, Amherst, Sedgwick, and Haxtun 514 AM MDT Wed Oct 13 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...Northwest winds 30 to 40 mph with gusts up to 60 mph expected. * WHERE...Phillips County and Sedgwick County Counties. * WHEN...Until 6 PM MDT this evening. * IMPACTS...strong winds will blow unsecured objects around. Tree limbs could be blown down and a few power outages may result. Travel will be difficult for high profile vehicles. $$ For more information from the National Weather Service, visit https://weather.gov/bou Entrekin
585 WWUS75 KBOU 131429 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver/Boulder CO 829 AM MDT Wed Oct 13 2021 COZ042-048-140000- /O.EXP.KBOU.FZ.W.0001.000000T0000Z-211013T1400Z/ /O.CON.KBOU.HW.W.0006.000000T0000Z-211014T0000Z/ Northeast Weld County-Logan County- Including Briggsdale, Grover, Pawnee Buttes, Raymer, Stoneham, Crook, Merino, Sterling, and Peetz 829 AM MDT Wed Oct 13 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... ...FREEZE WARNING HAS EXPIRED... * WHAT...Northwest winds 30 to 40 mph with gusts up to 60 mph. * WHERE...Northeast Weld County and Logan County. * WHEN...Until 6 PM MDT this evening. * IMPACTS...Strong winds will blow unsecured objects around. Tree limbs could be blown down and a few power outages may result. Travel will be difficult for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Strong winds may lead to property damage. Hazardous driving conditions due to powerful cross winds will pose a serious risk for drivers, especially for light weight and high profile vehicles. Loose outdoor items should be brought inside or secured properly. && $$ COZ038>041-043>046-049-131530- /O.EXP.KBOU.FZ.W.0001.000000T0000Z-211013T1400Z/ Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County-Washington County- Including Fort Collins, Hereford, Loveland, Nunn, Arvada, Boulder, Golden, Lakewood, Longmont, Aurora, Brighton, City of Denver, Denver International Airport, Highlands Ranch, Littleton, Parker, Castle Rock, Elbert, Fondis, Kiowa, Larkspur, Eaton, Fort Lupton, Greeley, Roggen, Brush, Fort Morgan, Goodrich, Wiggins, Bennett, Byers, Deer Trail, Leader, Agate, Hugo, Limon, Matheson, Akron, Cope, Last Chance, and Otis 829 AM MDT Wed Oct 13 2021 ...FREEZE WARNING HAS EXPIRED... Temperatures are warming above freezing this morning so the Freeze Warning was allowed to expire. $$ COZ050-051-140000- /O.CON.KBOU.HW.W.0006.000000T0000Z-211014T0000Z/ Sedgwick County-Phillips County- Including Julesburg, Ovid, Sedgwick, Amherst, Haxtun, and Holyoke 829 AM MDT Wed Oct 13 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING... * WHAT...Northwest winds 30 to 40 mph with gusts up to 55 mph. * WHERE...Phillips County and Sedgwick County. * WHEN...Until 6 PM MDT this evening. * IMPACTS...Strong winds will blow unsecured objects around. Tree limbs could be blown down and a few power outages may result. Travel will be difficult for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Strong winds may lead to property damage. Hazardous driving conditions due to powerful cross winds will pose a serious risk for drivers, especially for light weight and high profile vehicles. Loose outdoor items should be brought inside or secured properly. && $$ COZ035-131800- /O.CON.KBOU.HW.W.0006.000000T0000Z-211013T1800Z/ Larimer and Boulder Counties Between 6000 and 9000 Feet- Including Estes Park, Glendevey, Nederland, and Red Feather Lakes 829 AM MDT Wed Oct 13 2021 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL NOON MDT TODAY... * WHAT...West winds 35 to 45 mph with gusts up to 75 mph. * WHERE...The Northern Front Range Foothills. * WHEN...Until noon MDT today. * IMPACTS...Strong winds will blow unsecured objects around. Tree limbs could be blown down and a few power outages may result. Travel will be difficult for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Strong winds may lead to property damage. Hazardous driving conditions due to powerful cross winds will pose a serious risk for drivers, especially for light weight and high profile vehicles. Loose outdoor items should be brought inside or secured properly. && $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 13, 2:50 PM MDT | Freeze Warning | BOU | Arapahoe, Douglas, Elbert | 17 hr |
| Oct 13, 4:40 PM MDT | Frost Advisory | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 8 more | 15 hr |
Nearby
Freeze Warnings in Colorado, 2021Every freeze 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.