Alert archive / Colorado / Red Flag Warnings in 2021
Red Flag Warning 19, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Nov 5, 2021, 2:40 PM MDT for 6 counties in Colorado. It took effect at Nov 6, 2021, 12:00 PM MDT. 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
- Nov 5, 2021, 2:40 PM MDT (20:40 UTC)
- In effect from
- Nov 6, 2021, 12:00 PM MDT
- Expired
- Nov 6, 2021, 6:00 PM MDT
- In force
- 6 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Arapahoe County, CO, Douglas County, CO, Elbert County, CO, Lincoln County, CO, Park County, CO, Washington County, CO
The radar
The Denver radar (KFTG), 49 km from the middle of the area, began a volume at 20:40 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, 8.7 hours before the alert went out and 106 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
- 3328 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 132 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
089 WWUS85 KBOU 052040 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 240 PM MDT Fri Nov 5 2021 COZ246-247-249-060445- /O.NEW.KBOU.FW.W.0019.211106T1800Z-211107T0000Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Washington County- 240 PM MDT Fri Nov 5 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 6 PM MDT SATURDAY 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 to 6 PM MDT Saturday. * Affected Area...Fire Weather Zones 246, 247 and 249. * Timing...Noon to 6pm Saturday. * Winds...South 10 to 20 mph with gusts up to 30 mph. * Relative Humidity...As low as 12 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. && $$
4 follow-up statements
864 WWUS85 KBOU 060212 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 812 PM MDT Fri Nov 5 2021 COZ246-247-249-061300- /O.CON.KBOU.FW.W.0019.211106T1800Z-211107T0000Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Washington County- 812 PM MDT Fri Nov 5 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 6 PM MDT SATURDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR WASHINGTON, LINCOLN, AND EASTERN ELBERT COUNTIES... * Affected Area...Fire Weather Zones 246, 247 and 249. * Timing...Noon to 6pm Saturday. * Winds...South 10 to 20 mph with gusts up to 30 mph. * Relative Humidity...As low as 12 percent. * Impacts...Conditions will be conducive to the rapid spread of new fires. Probability of ignition will increase. Avoid any burning or outdoor activities that may cause sparks, and abide by established fire restrictions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
625 WWUS85 KBOU 060835 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 235 AM MDT Sat Nov 6 2021 COZ246-247-249-070000- /O.CON.KBOU.FW.W.0019.211106T1800Z-211107T0000Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Washington County- 235 AM MDT Sat Nov 6 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN ELBERT BELOW 6000 FEET, LINCOLN AND WASHINGTON COUNTIES... * Affected Area...Fire Weather Zones 246, 247 and 249. * Timing...Noon to 6 pm today. * Winds...South 10 to 20 mph with gusts up to 30 mph. * Relative Humidity...As low as 9 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. && $$
998 WWUS85 KBOU 061642 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1042 AM MDT Sat Nov 6 2021 COZ214-241-070000- /O.EXA.KBOU.FW.W.0019.211106T1800Z-211107T0000Z/ Central and Southeast Park County- Elbert/Central and East Douglas Counties Above 6000 Feet- 1042 AM MDT Sat Nov 6 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY UNTIL 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTH PARK AND PALMER DIVIDE... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect until 6 PM MDT this evening. * Affected Area...Fire Weather Zones 214 and 241. * Timing...Noon to 6 pm today. * Winds...Southwest 10 to 15 mph with gusts up to 30 mph. * Relative Humidity...As low as 8 percent. * Impacts...Conditions will be conducive to the rapid spread of new fires. Probability of ignition will increase. Avoid any burning or outdoor activities that may cause sparks, and abide by established fire restrictions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ246-247-249-070000- /O.CON.KBOU.FW.W.0019.211106T1800Z-211107T0000Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Washington County- 1042 AM MDT Sat Nov 6 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY UNTIL 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN ELBERT BELOW 6000 FEET, LINCOLN AND WASHINGTON COUNTIES... * Affected Area...Fire Weather Zones 246, 247 and 249. * Timing...Noon to 6 pm today. * Winds...South 10 to 15 mph with gusts up to 25 mph. * Relative Humidity...As low as 9 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. && $$
941 WWUS85 KBOU 062352 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 552 PM MDT Sat Nov 6 2021 COZ214-241-246-247-249-070100- /O.EXP.KBOU.FW.W.0019.000000T0000Z-211107T0000Z/ Central and Southeast Park County- Elbert/Central and East Douglas Counties Above 6000 Feet- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Washington County- 552 PM MDT Sat Nov 6 2021 ...RED FLAG WARNING WILL EXPIRE AT 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTH PARK, PALMER DIVIDE, EASTERN ELBERT COUNTY BELOW 6000 FEET, LINCOLN COUNTY AND WASHINGTON COUNTY... Winds have decreased and are less than 20 mph, therefore the Red Flag Warning will be allowed to expire. It will remain very dry through tonight and again Sunday when relative humidities will fall into the single digits. $$
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.