Alert archive / Colorado / Red Flag Warnings in 2021
Red Flag Warning 20, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Nov 7, 2021, 1:09 AM MST for Park County, Colorado. It took effect at Nov 7, 2021, 12:00 PM 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
- Nov 7, 2021, 1:09 AM MST (08:09 UTC)
- In effect from
- Nov 7, 2021, 12:00 PM MST
- Expired
- Nov 7, 2021, 6:00 PM MST
- In force
- 6 hr
- Issued by
- NWS Denver/Boulder, CO
County Park County, CO
The radar
The Denver radar (KFTG), 125 km from the middle of the area, began a volume at 08:08 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 00:00Z, 8.2 hours before the alert went out and 229 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
- 4520 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 228 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
761 WWUS85 KBOU 070809 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 109 AM MST Sun Nov 7 2021 COZ214-080100- /O.NEW.KBOU.FW.W.0020.211107T1900Z-211108T0100Z/ Central and Southeast Park County- 109 AM MST Sun Nov 7 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 6 PM MST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTH PARK... 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 MST this evening. * Affected Area...Fire Weather Zone 214. * Timing...Noon to 6 pm mst this evening. * Winds...Southwest 10 to 20 mph with gusts up to 35 mph. * Relative Humidity...As low as 11 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. && $$
2 follow-up statements
922 WWUS85 KBOU 072129 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 229 PM MST Sun Nov 7 2021 COZ214-080100- /O.CON.KBOU.FW.W.0020.000000T0000Z-211108T0100Z/ Central and Southeast Park County- 229 PM MST Sun Nov 7 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM MST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTH PARK... * Affected Area...Fire Weather Zone 214. * Timing...In effect until 6 PM MST this evening. * Winds...Southwest 10 to 20 mph with gusts up to 35 mph. * Relative Humidity...As low as 11 percent. * Impacts...Conditions will be conducive to the rapid spread of new fires. Probability of ignition will increase. Avoid any burning or outdoor activities that may cause sparks, and abide by established fire restrictions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
207 WWUS85 KBOU 080059 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 559 PM MST Sun Nov 7 2021 COZ214-080200- /O.EXP.KBOU.FW.W.0020.000000T0000Z-211108T0100Z/ Central and Southeast Park County- 559 PM MST Sun Nov 7 2021 ...RED FLAG WARNING WILL EXPIRE AT 6 PM MST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR SOUTH PARK... Winds have dropped below 20 mph and relative humidities have improved, therefore the Red Flag Warning will be allowed to expire. $$
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.