Alert archive / Colorado / Frost Advisories in 2021
Frost Advisory 2, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this frost advisory at Oct 10, 2021, 2:04 PM MDT for 7 counties in Colorado. It took effect at Oct 11, 2021, 2:00 AM MDT. It was in force for 6 hr.
The area
The counties it named.
The facts
- Issued
- Oct 10, 2021, 2:04 PM MDT (20:04 UTC)
- In effect from
- Oct 11, 2021, 2:00 AM MDT
- Expired
- Oct 11, 2021, 8:00 AM MDT
- In force
- 6 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Arapahoe County, CO, Douglas County, CO, Elbert County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Weld County, CO
The nearest sounding before it
Denver, CO (KDNR), launched 12:00Z, 8.1 hours before the alert went out and 69 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
- 1519 m above ground
- 0-6 km bulk shear
- 25 kt
- 0-1 km storm-relative helicity
- -33 m²/s²
- 0-3 km storm-relative helicity
- -26 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
867 WWUS75 KBOU 102004 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver CO 204 PM MDT Sun Oct 10 2021 COZ041>044-046>048-111200- /O.NEW.KBOU.FR.Y.0002.211011T0800Z-211011T1400Z/ Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- North and Northeast Elbert County Below 6000 Feet/North Lincoln County-Southeast Elbert County Below 6000 Feet/South Lincoln County-Logan County- Including the cities of Wiggins, Fort Morgan, Elbert, Hugo, Roggen, Forder, Larkspur, Fondis, Briggsdale, Sterling, Pawnee Buttes, Crook, Raymer, Fort Lupton, Matheson, Peetz, Kiowa, Grover, Eaton, Agate, Kutch, Castle Rock, Goodrich, Stoneham, Karval, Greeley, Punkin Center, Brush, Limon, and Merino 204 PM MDT Sun Oct 10 2021 ...FROST ADVISORY IN EFFECT FROM 2 AM TO 8 AM MDT MONDAY... * WHAT...Temperatures in the lower to mid 30s will result in frost formation. * WHERE...North and Northeast Elbert County Below 6000 Feet/North Lincoln County, Southeast Elbert County Below 6000 Feet/South Lincoln County, Central and South Weld County, Elbert/Central and East Douglas Counties Above 6000 Feet, Logan County, Morgan County and Northeast Weld County Counties. * WHEN...From 2 AM to 8 AM MDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...The coldest temperatures will occur across the Palmer Divide area, as well as low lying areas across the northeast plains. This includes the South Platte River Valley northeast of Denver. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Bring them indoors or cover them with blankets. && $$ For more information from the National Weather Service, visit https://weather.gov/bou Barjenbruch
2 follow-up statements
504 WWUS75 KBOU 110926 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver/Boulder CO 326 AM MDT Mon Oct 11 2021 COZ041>044-046>048-111400- /O.CON.KBOU.FR.Y.0002.000000T0000Z-211011T1400Z/ Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Logan County- Including Castle Rock, Elbert, Fondis, Kiowa, Larkspur, Briggsdale, Grover, Pawnee Buttes, Raymer, Stoneham, Eaton, Fort Lupton, Greeley, Roggen, Brush, Fort Morgan, Goodrich, Wiggins, Agate, Hugo, Limon, Matheson, Forder, Karval, Kutch, Punkin Center, Crook, Merino, Sterling, and Peetz 326 AM MDT Mon Oct 11 2021 ...FROST ADVISORY REMAINS IN EFFECT UNTIL 8 AM MDT THIS MORNING... * WHAT...Temperatures in the lower to mid 30s will result in frost formation. * WHERE...North and Northeast Elbert County Below 6000 Feet/North Lincoln County, Southeast Elbert County Below 6000 Feet/South Lincoln County, Central and South Weld County, Elbert/Central and East Douglas Counties Above 6000 Feet, Logan County, Morgan County and Northeast Weld County Counties. * WHEN...From 2 AM to 8 AM MDT Monday. * IMPACTS...Frost could harm sensitive outdoor vegetation. Sensitive outdoor plants may be killed if left uncovered. * ADDITIONAL DETAILS...The coldest temperatures will occur across the Palmer Divide area, as well as low lying areas across the northeast plains. This includes the South Platte River Valley northeast of Denver. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take steps now to protect tender plants from the cold. Bring them indoors or cover them with blankets. && $$
104 WWUS75 KBOU 111421 NPWBOU URGENT - WEATHER MESSAGE National Weather Service Denver/Boulder CO 821 AM MDT Mon Oct 11 2021 COZ041>044-046>048-111530- /O.EXP.KBOU.FR.Y.0002.000000T0000Z-211011T1400Z/ Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Logan County- Including Castle Rock, Elbert, Fondis, Kiowa, Larkspur, Briggsdale, Grover, Pawnee Buttes, Raymer, Stoneham, Eaton, Fort Lupton, Greeley, Roggen, Brush, Fort Morgan, Goodrich, Wiggins, Agate, Hugo, Limon, Matheson, Forder, Karval, Kutch, Punkin Center, Crook, Merino, Sterling, and Peetz 821 AM MDT Mon Oct 11 2021 ...FROST ADVISORY HAS EXPIRED... Temperatures have warmed above freezing this morning so the frost advisory has expired. $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 10, 2:43 PM MDT | Fire Weather Watch | BOU | Arapahoe, Douglas, Elbert, Lincoln | 37 hr |
Nearby
Frost Advisories in Colorado, 2021Every frost 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.