Alert archive / Colorado / Red Flag Warnings in 2017
Red Flag Warning 5, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Feb 21, 2017, 8:27 PM MST for 4 counties in Colorado. It took effect at Feb 22, 2017, 11:00 AM MST. It was in force for 7 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
- Feb 21, 2017, 8:27 PM MST (03:27 UTC)
- In effect from
- Feb 22, 2017, 11:00 AM MST
- Expired
- Feb 22, 2017, 6:00 PM MST
- In force
- 7 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Arapahoe County, CO, Douglas County, CO, Elbert County, CO, Lincoln County, CO
The radar
The Denver radar (KFTG), 59 km from the middle of the area, began a volume at 03:32 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 (KDEN), launched 00:00Z, 3.5 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
- 16 J/kg
- Mixed-layer CIN
- -45 J/kg
- Mixed-layer LCL
- 3681 m above ground
- 0-6 km bulk shear
- 80 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 75 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
061 WWUS85 KBOU 220327 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 827 PM MST Tue Feb 21 2017 Fire weather danger continues to impact the state with increased winds from the SW over dry grasses and fuels with low relative humidity. Wind gusts are expected to be from 25 to 35 mph over Elbert and Lincoln counties with RH values dipping into the lower teens by tomorrow afternoon. These conditions are expected to last until late Wednesday. COZ241-246-247-221130- /O.UPG.KBOU.FW.A.0003.170222T1800Z-170223T0100Z/ /O.NEW.KBOU.FW.W.0005.170222T1800Z-170223T0100Z/ 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- 827 PM MST Tue Feb 21 2017 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 6 PM MST WEDNESDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR PORTIONS OF LINCOLN AND 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 11 AM to 6 PM MST Wednesday. The Fire Weather Watch is no longer in effect. * Affected Area...Fire Weather Zones 241...246 and 247. * Timing...Gusty winds and warm temperatures will produce another round of high fire danger for the area by late Wednesday morning through Wednesday afternoon. * Winds...Southwest 15 TO 20 mph with gusts up to 35 mph. * Relative Humidity...as low as 10 percent. * Impacts...If a fire starts, it will be capable of spreading rapidly through grasses and brush due to the strong winds. 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. && $$
3 follow-up statements
670 WWUS85 KBOU 221110 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 410 AM MST Wed Feb 22 2017 ...EXTREME FIRE DANGER SOUTH OF DENVER TODAY... Warm temperatures and gusty winds will produce elevated fire danger across the plains of Colorado again today. Conditions will be worst in areas south of Interstate 70 this afternoon. COZ241-246-247-222000- /O.CON.KBOU.FW.W.0005.170222T1800Z-170223T0100Z/ Elbert/Central and East Douglas Counties Above 6000 Feet- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 410 AM MST Wed Feb 22 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 6 PM MST FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 241...246...AND 247... * Affected Area...Fire Weather Zones 241...246 and 247...eastern Douglas...Elbert...and Lincoln counties. * Timing...Fire danger will increase this morning and be extreme this afternoon. * Winds...West 10 to 20 mph with gusts up to 35 mph. * Relative Humidity...as low as 12 percent. * Impacts...Fires will ignite easily and spread rapidly due to dry fuels and strong winds. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ Gimmestad
344 WWUS85 KBOU 222027 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 127 PM MST Wed Feb 22 2017 ...EXTREME FIRE DANGER SOUTH OF DENVER TODAY... Warm temperatures and gusty winds will produce elevated fire danger across the plains of Colorado again today. Conditions will be worst in areas south of Interstate 70 this afternoon. COZ241-246-247-230100- /O.CON.KBOU.FW.W.0005.000000T0000Z-170223T0100Z/ 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- 127 PM MST Wed Feb 22 2017 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM MST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 241... 246...AND 247... * Affected Area...Fire Weather Zones 241...246 and 247. * Timing...Fire danger will stay elevated and continue to be extreme through the afternoon. * Winds...West 10 to 20 mph with gusts up to 35 mph..especially over eastern Douglas and western Elbert counties. * Relative Humidity...as low as 12 percent. * Impacts...Fires will ignite easily and spread rapidly due to dry fuels and strong winds. 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. && $$
994 WWUS85 KBOU 230117 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 617 PM MST Wed Feb 22 2017 COZ241-246-247-230230- /O.EXP.KBOU.FW.W.0005.000000T0000Z-170223T0100Z/ Elbert/Central and East Douglas Counties Above 6000 Feet- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 617 PM MST Wed Feb 22 2017 ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE AREA... WINDS WILL DECREASE WITH HUMIDITIES INCREASING THROUGH THE NIGHT. $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 22, 2:20 PM MST | Winter Weather Advisory | BOU | Boulder, Grand, Jackson, Larimer, Logan, Phillips and 2 more | 39 hr |
Nearby
Red Flag Warnings in Colorado, 2017Every red flag warning in 2017
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.