Alert archive / Colorado / Red Flag Warnings in 2018
Red Flag Warning 21, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Apr 29, 2018, 2:53 PM MDT for 10 counties in Colorado. It took effect at Apr 30, 2018, 10:00 AM MDT. It was in force for 9 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
- Apr 29, 2018, 2:53 PM MDT (20:53 UTC)
- In effect from
- Apr 30, 2018, 10:00 AM MDT
- Expired
- Apr 30, 2018, 7:00 PM MDT
- In force
- 9 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Adams County, CO, Arapahoe County, CO, Clear Creek County, CO, Douglas County, CO, Elbert County, CO, Gilpin County, CO, Jefferson County, CO, Lincoln County, CO, Park County, CO, Washington County, CO
The radar
The Denver radar (KFTG), 30 km from the middle of the area, began a volume at 20:53 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 12:00Z, 8.9 hours before the alert went out and 128 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
- 2665 m above ground
- 0-6 km bulk shear
- 27 kt
- 0-1 km storm-relative helicity
- -15 m²/s²
- 0-3 km storm-relative helicity
- -18 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
926 WWUS85 KBOU 292053 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 253 PM MDT Sun Apr 29 2018 ...HIGH FIRE DANGER REMAINS IN PLACE ACROSS PORTIONS OF EASTERN COLORADO THROUGH MONDAY... .Unseasonably warm temperatures, very low relative humidity and gusty southwest winds will create high fire danger across east central Colorado. Fire danger will decrease this evening as winds subside, but then increase again Monday as winds become gusty late in the morning through the afternoon. COZ246-247-300500- /O.UPG.KBOU.FW.A.0010.180430T1600Z-180501T0100Z/ /O.NEW.KBOU.FW.W.0021.180430T1600Z-180501T0100Z/ /O.CON.KBOU.FW.W.0020.000000T0000Z-180430T0100Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 253 PM MDT Sun Apr 29 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN ELBERT AND LINCOLN COUNTIES...FIRE WEATHER ZONES 246 AND 247... ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 7 PM MDT MONDAY 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 10 AM to 7 PM MDT Monday. The Fire Weather Watch is no longer in effect. * Affected Area...Fire Weather Zones 246 and 247. * Timing...Until early evening today, and then again late Monday morning through early Monday evening. * Winds...Southwest 15 to 25 mph with gusts around 35 mph. * Relative Humidity...As low as 9 percent. * Impacts...Grassland fires may start and spread rapidly with the very warm, dry and gusty weather conditions. 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 very warm temperatures can contribute to extreme fire behavior. && $$ COZ216-245-249-300500- /O.NEW.KBOU.FW.W.0021.180430T1600Z-180501T0100Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Central and East Adams and Arapahoe Counties-Washington County- 253 PM MDT Sun Apr 29 2018 ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 7 PM MDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SOUTHERN FRONT RANGE FOOTHILLS...AND PLAINS THROUGH EASTERN ADAMS...ARAPAHOE...AND WASHINGTON COUNTIES...FIRE WEATHER ZONES 216...245...AND 246... The National Weather Service in Denver has issued a Red Flag Warning FOR WIND AND LOW RELATIVE HUMIDITY, which is in effect from 10 AM to 7 PM MDT Monday. * Affected Area...Fire Weather Zones 216...245 and 249. * Timing...Late Monday morning through early Monday evening. * Winds...Southwest 15 to 25 mph with gusts up to 35 mph. * Relative Humidity...As low as 11 percent. * Impacts...Fires may start and spread rapidly with the very warm, dry and gusty weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
4 follow-up statements
044 WWUS85 KBOU 300055 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 655 PM MDT Sun Apr 29 2018 ...HIGH FIRE DANGER REMAINS IN PLACE ACROSS PORTIONS OF EASTERN COLORADO THROUGH MONDAY... .Unseasonably warm temperatures, very low relative humidity and gusty southwest winds will create high fire danger across east central Colorado. Fire danger will continue to decrease this evening as winds subside, but then increase again Monday as winds become gusty late in the morning through the afternoon. COZ246-247-301200- /O.EXP.KBOU.FW.W.0020.000000T0000Z-180430T0100Z/ /O.CON.KBOU.FW.W.0021.180430T1600Z-180501T0100Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 655 PM MDT Sun Apr 29 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 7 PM MDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR EASTERN ELBERT AND LINCOLN COUNTIES...FIRE WEATHER ZONES 246 AND 247... ...RED FLAG WARNING WILL EXPIRE AT 7 PM MDT THIS EVENING 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...The wind will pick up again late Monday morning through early Monday evening. * Winds...South 15 to 25 mph with gusts up to 35 mph. * Relative Humidity...As low as 9 percent. * Impacts...Grassland fires may start and spread rapidly with the very warm, dry and gusty weather conditions. 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 very warm temperatures can contribute to extreme fire behavior. 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. && $$ COZ216-245-249-301200- /O.CON.KBOU.FW.W.0021.180430T1600Z-180501T0100Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Central and East Adams and Arapahoe Counties-Washington County- 655 PM MDT Sun Apr 29 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM TO 7 PM MDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SOUTHERN FRONT RANGE FOOTHILLS...AND PLAINS THROUGH EASTERN ADAMS...ARAPAHOE... AND WASHINGTON COUNTIES...FIRE WEATHER ZONES 216...245...AND 246... * Affected Area...Fire Weather Zones 216...245 and 249. * Timing...Late Monday morning through early Monday evening. * Winds...Southwest 15 to 20 mph with gusts up to 35 mph. * Relative Humidity...As low as 11 percent. * Impacts...Fires may start and spread rapidly with the very warm, dry and gusty weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
267 WWUS85 KBOU 301157 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 557 AM MDT Mon Apr 30 2018 ...HIGH FIRE DANGER TODAY FOR PORTIONS OF EAST CENTRAL COLORADO AND THE SOUTHERN FRONT RANGE FOOTHILLS... .Unseasonably warm temperatures, very low relative humidity and gusty southwest winds will create high fire danger across east central plains and southern Front range foothills from late this morning through early this evening. The fire danger will decrease this evening as winds subside and with an increase in relative humidity. COZ216-245>247-249-302000- /O.CON.KBOU.FW.W.0021.180430T1600Z-180501T0100Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Washington County- 557 AM MDT Mon Apr 30 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SOUTHERN FRONT RANGE FOOTHILLS...AND PLAINS THROUGH EASTERN ADAMS...ARAPAHOE...AND WASHINGTON COUNTIES...FIRE WEATHER ZONES 216...245...AND 246... * Affected Area...Fire Weather Zones 216...245...246...247 and 249. * Timing...Late this morning through early this evening. * Winds...Southwest 20 to 30 mph with gusts up to 40 mph. * Relative Humidity...As low as 7 percent. * Impacts...Fires may start and spread rapidly with the very warm, dry and gusty weather conditions. 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. && $$ Baker
765 WWUS85 KBOU 302222 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 422 PM MDT Mon Apr 30 2018 COZ216-245>247-249-010100- /O.CON.KBOU.FW.W.0021.000000T0000Z-180501T0100Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Washington County- 422 PM MDT Mon Apr 30 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SOUTHERN FRONT RANGE FOOTHILLS...AND PLAINS THROUGH EASTERN ADAMS...ARAPAHOE...AND WASHINGTON COUNTIES...FIRE WEATHER ZONES 216...245...AND 246... * Affected Area...Fire Weather Zones 216...245...246...247 and 249. * Timing...in effect through early this evening. * Winds...Southwest 15 to 25 mph with gusts up to 35 mph. * Relative Humidity...As low as 10 percent. * Impacts...Fires may start and spread rapidly with the very warm, dry and gusty weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
245 WWUS85 KBOU 010056 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 656 PM MDT Mon Apr 30 2018 COZ216-245>247-249-010200- /O.EXP.KBOU.FW.W.0021.000000T0000Z-180501T0100Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Washington County- 656 PM MDT Mon Apr 30 2018 ...RED FLAG WARNING WILL EXPIRE AT 7 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE SOUTHERN FRONT RANGE FOOTHILLS...AND PLAINS THROUGH EASTERN ADAMS...ARAPAHOE...AND WASHINGTON COUNTIES...FIRE WEATHER ZONES 216...245...AND 246... The Red Flag Warning will be allowed to expire at 7 pm mdt this evening. Gusty winds will decrease with a gradual increase in relative humidities through the evening. $$
Nearby
Red Flag Warnings in Colorado, 2018Every red flag warning in 2018
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.