Alert archive / Colorado / Red Flag Warnings in 2021
Red Flag Warning 18, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Oct 26, 2021, 3:12 AM MDT for Elbert County, Lincoln County, Washington County, Colorado. It took effect at Oct 26, 2021, 12:00 PM MDT. It was in force for 6 hr. 2 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 26, 2021, 3:12 AM MDT (09:12 UTC)
- In effect from
- Oct 26, 2021, 12:00 PM MDT
- Expired
- Oct 26, 2021, 6:00 PM MDT
- In force
- 6 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Elbert County, CO, Lincoln County, CO, Washington County, CO
The radar
The Denver radar (KFTG), 90 km from the middle of the area, began a volume at 09:13 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 |
|---|---|---|---|
| Oct 26, 1:59 PM MDT | NON-TSTM WND GST 61 | 1 Ese Akron, CO | MESONET STATION EW7755 AKRON. |
| Oct 26, 3:11 PM MDT | NON-TSTM WND GST 70 | Akron, CO | ASOS STATION KAKO AKRON. |
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, 9.2 hours before the alert went out and 60 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
- 3168 m above ground
- 0-6 km bulk shear
- 55 kt
- 0-1 km storm-relative helicity
- 293 m²/s²
- 0-3 km storm-relative helicity
- 362 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
019 WWUS85 KBOU 260912 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 312 AM MDT Tue Oct 26 2021 COZ246-247-249-261715- /O.NEW.KBOU.FW.W.0018.211026T1800Z-211027T0000Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Washington County- 312 AM MDT Tue Oct 26 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR WASHINGTON, LINCOLN, AND EASTERN ELBERT COUNTIES... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from noon today to 6 PM MDT this evening. * Affected Area...Fire Weather Zones 246, 247 and 249. * Timing...Noon to 6pm today. * Winds...Southwest 25 to 30 mph with gusts up to 40 mph. * Relative Humidity...As low as 15 percent. * Impacts...Conditions will be conducive to the rapid spread of new fires. Probability of ignition will increase. Avoid any burning or outdoor activities that may cause sparks, and abide by established fire restrictions. 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. && $$
2 follow-up statements
905 WWUS85 KBOU 261539 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 939 AM MDT Tue Oct 26 2021 COZ246-247-249-270000- /O.CON.KBOU.FW.W.0018.211026T1800Z-211027T0000Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Washington County- 939 AM MDT Tue Oct 26 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR WASHINGTON, LINCOLN, AND EASTERN ELBERT COUNTIES... * Affected Area...Fire Weather Zones 246, 247 and 249. * Timing...Noon to 6pm today. * Winds...Southwest 25 to 30 mph with gusts up to 50 mph. * Relative Humidity...As low as 15 percent. * Impacts...Conditions will be conducive to the rapid spread of new fires. Probability of ignition will increase. Avoid any burning or outdoor activities that may cause sparks, and abide by established fire restrictions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
121 WWUS85 KBOU 270002 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 602 PM MDT Tue Oct 26 2021 ...RED FLAG WARNING WILL EXPIRE FOR WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES...246...247 AND 249... COZ246-247-249-270115- /O.EXP.KBOU.FW.W.0018.000000T0000Z-211027T0000Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Washington County- 602 PM MDT Tue Oct 26 2021 ...RED FLAG WARNING WILL EXPIRE AT 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR WASHINGTON, LINCOLN, AND EASTERN ELBERT COUNTIES... Current observations show relative humidity percentages ranging from 70-80 across fire weather zones 246, 247, and 249. Additionally, light rain showers continue to impact the area. Although gusty winds will continue, the Red Flag Warning will be allowed to expire due to recovering humidity levels above warning criteria. $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 26, 3:06 AM MDT | High Wind Watch | BOU | Elbert, Lincoln, Logan, Phillips, Sedgwick, Washington and 1 more | 7 hr |
| Oct 26, 9:51 AM MDT | High Wind Warning | BOU | Elbert, Lincoln, Logan, Morgan, Phillips, Sedgwick and 2 more | 14 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.