Alert archive / Colorado / Red Flag Warnings in 2021
Red Flag Warning 28, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Dec 25, 2021, 3:34 PM MST for Elbert County, Lincoln County, Colorado. It took effect at Dec 26, 2021, 11:00 AM MST. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Dec 25, 2021, 3:34 PM MST (22:34 UTC)
- In effect from
- Dec 26, 2021, 11:00 AM MST
- Expired
- Dec 26, 2021, 5:00 PM MST
- In force
- 6 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Elbert County, CO, Lincoln County, CO
The radar
The Pueblo radar (KPUX), 81 km from the middle of the area, began a volume at 22:38 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, 10.6 hours before the alert went out and 96 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
- 2171 m above ground
- 0-6 km bulk shear
- 109 kt
- 0-1 km storm-relative helicity
- 190 m²/s²
- 0-3 km storm-relative helicity
- 307 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
407 WWUS85 KBOU 252234 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 334 PM MST Sat Dec 25 2021 COZ241-249-252345- /O.CAN.KBOU.FW.A.0019.211226T1800Z-211227T0000Z/ Elbert/Central and East Douglas Counties Above 6000 Feet- Washington County- 334 PM MST Sat Dec 25 2021 ...FIRE WEATHER WATCH IS CANCELLED FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN DOUGLAS...WESTERN ELBERT...AND WASHINGTON COUNTIES...FIRE WEATHER ZONES 241 AND 249... The National Weather Service in Denver has cancelled the Fire Weather Watch. Strong winds are expected on Sunday with low humidities, but cool temperatures are expected to keep the humidities above Red Flag criteria, around 20 percent. $$ COZ246-247-261200- /O.UPG.KBOU.FW.A.0019.211226T1800Z-211227T0000Z/ /O.NEW.KBOU.FW.W.0028.211226T1800Z-211227T0000Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 334 PM MST Sat Dec 25 2021 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 5 PM MST SUNDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN ELBERT AND LINCOLN COUNTIES...FIRE WEATHER ZONES 246 AND 247... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 11 AM to 5 PM MST Sunday. The Fire Weather Watch is no longer in effect. * Affected Area...Fire Weather Zones 246 and 247. * Timing...Sunday, 11 AM to 5 PM MST. * Winds...Southwest 25 to 30 mph with gusts up to 50 mph. * Relative Humidity...As low as 15 percent. * Impacts...Any fires that develop are likely to spread rapidly. Outdoor burning should be avoided, as well as any activities that may cause sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ GIMMESTAD
4 follow-up statements
370 WWUS85 KBOU 261052 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 352 AM MST Sun Dec 26 2021 COZ246-247-261900- /O.CON.KBOU.FW.W.0028.211226T1800Z-211227T0000Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 352 AM MST Sun Dec 26 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN ELBERT AND LINCOLN COUNTIES...FIRE WEATHER ZONES 246 AND 2745... * Affected Area...Fire Weather Zones 246 and 247. * Timing...Sunday, 11 AM to 5 PM MST. * Winds...Southwest 25 to 35 mph with gusts up to 60 mph. * Relative Humidity...As low as 15 percent. * Impacts...Any fires that develop are likely to spread rapidly. Outdoor burning should be avoided, as well as any activities that may cause sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
227 WWUS85 KBOU 261053 CCA RFWBOU URGENT - FIRE WEATHER MESSAGE...CORRECTED National Weather Service Denver/Boulder CO 353 AM MST Sun Dec 26 2021 COZ246-247-261900- /O.COR.KBOU.FW.W.0028.211226T1800Z-211227T0000Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 353 AM MST Sun Dec 26 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN ELBERT AND LINCOLN COUNTIES...FIRE WEATHER ZONES 246 AND 247... * Affected Area...Fire Weather Zones 246 and 247. * Timing...Sunday, 11 AM to 5 PM MST. * Winds...Southwest 25 to 35 mph with gusts up to 60 mph. * Relative Humidity...As low as 15 percent. * Impacts...Any fires that develop are likely to spread rapidly. Outdoor burning should be avoided, as well as any activities that may cause sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
502 WWUS85 KBOU 261826 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1126 AM MST Sun Dec 26 2021 COZ246-247-270000- /O.CON.KBOU.FW.W.0028.000000T0000Z-211227T0000Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 1126 AM MST Sun Dec 26 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN ELBERT AND LINCOLN COUNTIES...FIRE WEATHER ZONES 246 AND 247... * Affected Area...Fire Weather Zones 246 and 247. * Timing...Winds will increase through early afternoon with already low humidities. There will be some decrease in the winds along with higher humidities by late afternoon. * Winds...Southwest 25 to 35 mph with gusts up to 60 mph. * Relative Humidity...As low as 16 percent. * Impacts...Any fires that develop are likely to spread rapidly. Outdoor burning should be avoided, as well as any activities that may cause sparks. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Gimmestad
300 WWUS85 KBOU 262359 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 459 PM MST Sun Dec 26 2021 COZ246-247-270100- /O.EXP.KBOU.FW.W.0028.000000T0000Z-211227T0000Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 459 PM MST Sun Dec 26 2021 ...RED FLAG WARNING WILL EXPIRE AT 5 PM MST THIS AFTERNOON FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN ELBERT AND LINCOLN COUNTIES...FIRE WEATHER ZONES 246 AND 247... The strong and gusty winds will gradually decrease through the evening hours while humidity levels slowly improve. $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 25, 3:25 AM MST | Fire Weather Watch | BOU | Arapahoe, Douglas, Elbert, Lincoln, Washington | 12 hr |
| Dec 25, 3:46 AM MST | Winter Storm Watch | BOU | Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more | 10 hr |
| Dec 25, 1:48 PM MST | Winter Storm Warning | BOU | Grand, Jackson | 66 hr |
| Dec 25, 1:48 PM MST | Winter Weather Advisory | BOU | Boulder, Clear Creek, Gilpin, Grand, Jackson, Jefferson and 3 more | 66 hr |
Nearby
Red Flag Warnings in Colorado, 2021Every red flag 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.