Alert archive / Colorado / Red Flag Warnings in 2017
Red Flag Warning 18, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Mar 22, 2017, 10:47 AM MDT for 19 counties in Colorado. It took effect at Mar 23, 2017, 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
- Mar 22, 2017, 10:47 AM MDT (16:47 UTC)
- In effect from
- Mar 23, 2017, 12:00 PM MDT
- Expired
- Mar 23, 2017, 6:00 PM MDT
- In force
- 6 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Adams County, CO, Arapahoe County, CO, Boulder County, CO, Broomfield County, CO, Clear Creek County, CO, Denver County, CO, Douglas County, CO, Elbert County, CO, Gilpin County, CO, Jefferson County, CO, Larimer County, CO, Lincoln County, CO, Logan County, CO, Morgan County, CO, Park County, CO, Phillips County, CO, Sedgwick County, CO, Washington County, CO, Weld County, CO
The radar
The Denver radar (KFTG), 22 km from the middle of the area, began a volume at 16:45 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, 4.8 hours before the alert went out and 99 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
- 1772 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 96 m²/s²
- 0-3 km storm-relative helicity
- 136 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
561 WWUS85 KBOU 221647 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1047 AM MDT Wed Mar 22 2017 ...Red Flag Warning for the Southern Foothills, Palmer Divide and Adjacent Plains, including Denver and areas east and southeast Thursday afternoon... Conditions will be very warm and dry through most of the afternoon Thursday, with gusty southerly winds expected. Colder temperatures coupled with rain and snow will sweep across across much of the region Thursday night and Friday. COZ240-241-245>247-249-230100- /O.UPG.KBOU.FW.A.0015.170323T1800Z-170324T0000Z/ /O.NEW.KBOU.FW.W.0018.170323T1800Z-170324T0000Z/ North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 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- 1047 AM MDT Wed Mar 22 2017 ...RED FLAG WARNING IN EFFECT FROM NOON TO 6 PM MDT THURSDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE AND ADJACENT PLAINS INCLUDING DENVER AND AREAS EAST AND SOUTHEAST... 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 Thursday. The Fire Weather Watch is no longer in effect. * Affected Area...Fire Weather Zones 240...241...245...246... 247 and 249. * Timing...Gusty southerly winds will develop by midday Thursday the afternoon with the relative humidities dropping to around 10 percent by early afternoon. * Winds...South 10 to 20 mph with gusts up to 35 mph. * Relative Humidity...as low as 10 percent. * Impacts...Conditions will be favorable for rapid ignition of dry vegetation, fire growth and spread. Any outdoor burning is strongly discouraged, and in some areas, illegal. Check with local law enforcement. 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. && $$ COZ216-239-230100- /O.NEW.KBOU.FW.W.0018.170323T1800Z-170324T0000Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- 1047 AM MDT Wed Mar 22 2017 ...RED FLAG WARNING IN EFFECT FROM NOON TO 6 PM MDT THURSDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE FOOTHILLS AND LOWER ELEVATIONS OF JEFFERSON...BOULDER AND JEFFERSON COUNTIES... The National Weather Service in Denver has issued a Red Flag Warning FOR WIND AND LOW RELATIVE HUMIDITY...which is in effect from noon to 6 PM MDT Thursday. * Affected Area...Fire Weather Zones 216 and 239...with Jefferson and Douglas counties seeing the strongest winds and critical fire weather conditions. * Timing...Gusty southerly winds will develop by midday Thursday the afternoon with the relative humidities dropping to around 10 percent by early afternoon. * Winds...Southwest 10 to 15 mph with gusts up to 25 mph, strongest in the foothills of Jefferson and Douglas counties. * Relative Humidity...as low as 12 percent. * Impacts...Conditions will be favorable for rapid ignition of dry vegetation, fire growth and spread. Any outdoor burning is strongly discouraged, and in some areas, illegal. Check with local law enforcement. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
6 follow-up statements
697 WWUS85 KBOU 222223 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 423 PM MDT Wed Mar 22 2017 ...Red Flag Warning for the Southern Foothills, Palmer Divide and Adjacent Plains, including Denver and areas east and southeast Thursday afternoon... Conditions will be very warm and dry through most of the afternoon Thursday, with gusty southerly winds expected. Colder temperatures coupled with rain and snow will sweep across across much of the region Thursday night and Friday. COZ216-239>241-245>247-249-230630- /O.CON.KBOU.FW.W.0018.170323T1800Z-170324T0000Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 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- 423 PM MDT Wed Mar 22 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 6 PM MDT THURSDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE AND ADJACENT PLAINS INCLUDING DENVER AND AREAS EAST AND SOUTHEAST... * Affected Area...Fire Weather Zones 216...239...240...241... 245...246...247 and 249. * Timing...Gusty southerly winds will develop by midday Thursday the afternoon with the relative humidities dropping to around 10 percent by early afternoon. * Winds...Southwest 15 to 20 mph with gusts up to 40 mph. * Relative Humidity...as low as 10 percent. * Impacts...Conditions will be favorable for rapid ignition of dry vegetation, fire growth and spread. Any outdoor burning is strongly discouraged, and in some areas, illegal. Check with local law enforcement. 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. && $$
107 WWUS85 KBOU 230606 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 1206 AM MDT Thu Mar 23 2017 ...Red Flag Warning for the Southern Foothills, Palmer Divide and Adjacent Plains, including Denver and areas east and southeast Thursday afternoon... Conditions will be very warm and dry through most of the this afternoon, with gusty southerly winds expected. Colder temperatures coupled with rain and snow will sweep across across much of the region tonight and Friday. COZ216-239>241-245>247-249-231815- /O.CON.KBOU.FW.W.0018.170323T1800Z-170324T0000Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 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- 1206 AM MDT Thu Mar 23 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE AND ADJACENT PLAINS INCLUDING DENVER AND AREAS EAST AND SOUTHEAST... * Affected Area...Fire Weather Zones 216...239...240...241... 245...246...247 and 249. * Timing...Gusty southerly winds will develop by midday Thursday the afternoon with the relative humidities dropping to around 10 percent by early afternoon. * Winds...Southwest 15 to 20 mph with gusts up to 35 mph. * Relative Humidity...as low as 10 percent. * Impacts...Conditions will be favorable for rapid ignition of dry vegetation, fire growth and spread. Any outdoor burning is strongly discouraged, and in some areas, illegal. Check with local law enforcement. 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. && $$
348 WWUS85 KBOU 231038 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 438 AM MDT Thu Mar 23 2017 ...Red Flag Warning for the Southern Foothills, Palmer Divide and northeast Plains, including Denver this afternoon... Conditions will be very warm and dry through most of the this afternoon, with gusty southerly winds expected. Colder temperatures coupled with rain and snow will sweep across across much of the region tonight and Friday. COZ242-244-248-250-251-231845- /O.EXA.KBOU.FW.W.0018.170323T1800Z-170324T0000Z/ Northeast Weld County-Morgan County-Logan County-Sedgwick County- Phillips County- 438 AM MDT Thu Mar 23 2017 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR northeast Weld, Morgan, Logan, Sedgwick and Phillips 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 242...244...248...250 and 251. * Timing...Gusty southerly winds will develop by midday and continue through this afternoon with the relative humidities dropping to around 10 percent. * Winds...Southwest 15 to 20 mph with gusts up to 30 mph. * Relative Humidity...as low as 9 percent. * Impacts...Conditions will be favorable for rapid ignition of dry vegetation, fire growth and spread. Any outdoor burning is strongly discouraged, and in some areas, illegal. Check with local law enforcement. 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. && $$ COZ216-239>241-245>247-249-231845- /O.CON.KBOU.FW.W.0018.170323T1800Z-170324T0000Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Washington County- 438 AM MDT Thu Mar 23 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR THE PALMER DIVIDE AND ADJACENT PLAINS INCLUDING DENVER AND AREAS EAST AND SOUTHEAST... * Affected Area...Fire Weather Zones 216...239...240...241... 245...246...247 and 249. * Timing...Gusty southerly winds will develop by midday and continue through this afternoon with the relative humidities dropping to around 10 percent. * Winds...Southwest 15 to 20 mph with gusts up to 35 mph. * Relative Humidity...as low as 8 percent. * Impacts...Conditions will be favorable for rapid ignition of dry vegetation, fire growth and spread. Any outdoor burning is strongly discouraged, and in some areas, illegal. Check with local law enforcement. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
311 WWUS85 KBOU 231243 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 643 AM MDT Thu Mar 23 2017 ...Red Flag Warning for the Southern Foothills, Palmer Divide and northeast Plains, including Denver this afternoon... Conditions will be very warm and dry through this afternoon, with gusty southerly winds expected. Colder temperatures coupled with rain and snow will sweep across across much of the region tonight and Friday. COZ216-239>242-244>251-232045- /O.CON.KBOU.FW.W.0018.170323T1800Z-170324T0000Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Morgan County- 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- Logan County-Washington County-Sedgwick County-Phillips County- 643 AM MDT Thu Mar 23 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR Southern Foothills, Palmer Divide and Northeast Plains, including Denver... * Affected Area...Fire Weather Zones 216...239...240...241... 242...244...245...246...247...248...249...250 and 251. * Timing...Gusty southerly winds will develop by midday and continue through this afternoon with the relative humidities dropping to around 10 percent. * Winds...Southwest 10 to 20 mph with gusts up to 35 mph. * Relative Humidity...as low as 9 percent. * Impacts...Conditions will be favorable for rapid ignition of dry vegetation, fire growth and spread. Any outdoor burning is strongly discouraged, and in some areas, illegal. Check with local law enforcement. 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. && $$
148 WWUS85 KBOU 231458 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 858 AM MDT Thu Mar 23 2017 ...Red Flag Warning for the Southern Foothills, Palmer Divide and northeast Plains, including Denver this afternoon... Conditions will be very warm and dry through this afternoon, with gusty southerly winds expected. Colder temperatures coupled with rain and snow will sweep across across much of the region tonight and Friday. Weld and Larimer counties have been added to the warning. With higher moisture levels over Phillips and Sedgwick counties that humidity levels may not get low enough but will keep the Red Flag Warning going for now. COZ238-243-232300- /O.EXA.KBOU.FW.W.0018.170323T1800Z-170324T0000Z/ Larimer County Below 6000 Feet/Northwest Weld County- Central and South Weld County- 858 AM MDT Thu Mar 23 2017 ...RED FLAG WARNING IN EFFECT FROM NOON TODAY TO 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR LARIMER AND WELD 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 238 and 243. The strongest winds will be across Eastern portions of Weld and Larimer Counties. * Timing...Gusty southerly winds will develop by midday and continue through this afternoon with the relative humidities dropping to around 10 percent. * Winds...Southwest 15 to 25 mph with gusts up to 35 mph. * Relative Humidity...as low as 11 percent. * Impacts...Conditions will be favorable for rapid ignition of dry vegetation, fire growth and spread. Any outdoor burning is strongly discouraged, and in some areas, illegal. Check with local law enforcement. 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. && $$ COZ216-239>242-244>251-232300- /O.CON.KBOU.FW.W.0018.170323T1800Z-170324T0000Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Morgan County- 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- Logan County-Washington County-Sedgwick County-Phillips County- 858 AM MDT Thu Mar 23 2017 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 6 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR MUCH OF NORTHEAST COLORADO... * Affected Area...Fire Weather Zones 216...239...240...241... 242...244...245...246...247...248...249...250 and 251. * Timing...Gusty southerly winds will develop by midday and continue through this afternoon with the relative humidities dropping to around 10 percent. * Winds...Southwest 15 to 25 mph with gusts up to 35 mph. * Relative Humidity...as low as 9 percent. * Impacts...Conditions will be favorable for rapid ignition of dry vegetation, fire growth and spread. Any outdoor burning is strongly discouraged, and in some areas, illegal. Check with local law enforcement. 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. && $$
775 WWUS85 KBOU 240016 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 616 PM MDT Thu Mar 23 2017 COZ216-238>251-240130- /O.EXP.KBOU.FW.W.0018.000000T0000Z-170324T0000Z/ Jefferson and West Douglas Counties Above 6000 Feet/Gilpin/Clear Creek/Northeast Park Counties Below 9000 Feet- Larimer County Below 6000 Feet/Northwest Weld County- Boulder And Jefferson Counties Below 6000 Feet/West Broomfield County- North Douglas County Below 6000 Feet/Denver/West Adams and Arapahoe Counties/East Broomfield County- Elbert/Central and East Douglas Counties Above 6000 Feet- Northeast Weld County-Central and South Weld County-Morgan County- Central and East Adams and Arapahoe Counties- North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- Logan County-Washington County-Sedgwick County-Phillips County- 616 PM MDT Thu Mar 23 2017 ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY FOR THE NORTHEASTERN PLAINS... Conditions that warranted the Red Flag Warning have subsided. Winds will continue to gust up to 35 mph from the North but will introduce increasing relative humidity values. $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 22, 3:57 AM MDT | Fire Weather Watch | BOU | Adams, Arapahoe, Broomfield, Denver, Douglas, Elbert and 2 more | 7 hr |
| Mar 22, 3:58 PM MDT | Winter Storm Watch | BOU | Arapahoe, Boulder, Clear Creek, Douglas, Elbert, Gilpin and 6 more | 24 hr |
| Mar 22, 4:18 PM MDT | High Wind Watch | BOU | Arapahoe, Douglas, Elbert, Lincoln | 23 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.