Alert archive / Colorado / Red Flag Warnings in 2021
Red Flag Warning 7, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Apr 24, 2021, 3:17 PM MDT for Elbert County, Lincoln County, Colorado. It took effect at Apr 25, 2021, 12:00 PM MDT. It was in force for 8 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 24, 2021, 3:17 PM MDT (21:17 UTC)
- In effect from
- Apr 25, 2021, 12:00 PM MDT
- Expired
- Apr 25, 2021, 8:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Elbert County, CO, Lincoln County, CO
The radar
The Pueblo radar (KPUX), 81 km from the middle of the area, began a volume at 21:19 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, 9.3 hours before the alert went out and 96 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
- 1251 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 217 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
581 WWUS85 KBOU 242117 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 317 PM MDT Sat Apr 24 2021 ...INCREASING FIRE WEATHER CONCERNS SUNDAY AND MONDAY... .Elevated fire weather danger in the afternoon Sunday and Monday due to low relative humidity and strong wind gusts on the eastern plains, where there are plenty of dead winter fuels as green-up hasn't occurred yet. Conditions Monday are expected to be drier and windier than conditions Sunday. COZ246-247-250530- /O.UPG.KBOU.FW.A.0004.210425T1800Z-210426T0200Z/ /O.NEW.KBOU.FW.W.0007.210425T1800Z-210426T0200Z/ /O.NEW.KBOU.FW.A.0005.210426T1500Z-210427T0200Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 317 PM MDT Sat Apr 24 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM MDT SUNDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 246 AND 247, LINCOLN COUNTY AND EASTERN ELBERT COUNTY... ...FIRE WEATHER WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 246 AND 247, LINCOLN COUNTY AND EASTERN ELBERT COUNTY... 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 8 PM MDT Sunday. A Fire Weather Watch has also been issued. This Fire Weather Watch for wind and low relative humidity is in effect from Monday morning through Monday evening. * Affected Area...Fire Weather Zones 246 and 247. * Timing...Sunday noon to 8 PM, then Monday late morning through early evening. * Winds...Southwest 15 to 25 mph with gusts up to 40 mph. * Relative Humidity...As low as 10 to 15 percent Sunday, and possibly lower on Monday. * Impacts...Strong winds combined with low relative humidity may cause new fire starts to rapidly spread and grow. 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. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ COZ249-251-250530- /O.NEW.KBOU.FW.A.0005.210426T1500Z-210427T0200Z/ Washington County-Phillips County- 317 PM MDT Sat Apr 24 2021 ...FIRE WEATHER WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 249 AND 251, WASHINGTON AND PHILLIPS COUNTIES OF THE EASTERN PLAINS... The National Weather Service in Denver has issued a Fire Weather Watch for wind and low relative humidity, which is in effect from Monday morning through Monday evening. * Affected Area...Fire Weather Zones 249 and 251. * Timing...Late Monday morning through early Monday evening. * Winds...Southwest 15 to 20 mph with gusts up to 35 mph. * Relative Humidity...As low as 9 percent. * Impacts... PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$
4 follow-up statements
541 WWUS85 KBOU 250236 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 836 PM MDT Sat Apr 24 2021 ...INCREASING FIRE WEATHER CONCERNS SUNDAY AND MONDAY... .Elevated fire weather danger in the afternoon Sunday and Monday due to low relative humidity and strong wind gusts on the eastern plains, where there are plenty of dead winter fuels as green-up hasn't occurred yet. Conditions Monday are expected to be drier and windier than conditions Sunday. COZ246-247-251030- /O.CON.KBOU.FW.W.0007.210425T1800Z-210426T0200Z/ /O.CON.KBOU.FW.A.0005.210426T1500Z-210427T0200Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 836 PM MDT Sat Apr 24 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 8 PM MDT SUNDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 246 AND 247, LINCOLN COUNTY AND EASTERN ELBERT COUNTY... ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 246 AND 247, LINCOLN COUNTY AND EASTERN ELBERT COUNTY... * Affected Area...Fire Weather Zones 246 and 247. * Timing...Sunday noon to 8 PM, then Monday late morning through early evening. * Winds...Southwest 15 to 25 mph with gusts up to 40 mph. * Relative Humidity...As low as 8 percent. * Impacts...Strong winds combined with low relative humidity may cause new fire starts to rapidly spread and grow. 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. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ COZ249-251-251030- /O.CON.KBOU.FW.A.0005.210426T1500Z-210427T0200Z/ Washington County-Phillips County- 836 PM MDT Sat Apr 24 2021 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 249 AND 251, WASHINGTON AND PHILLIPS COUNTIES OF THE EASTERN PLAINS... * Affected Area...Fire Weather Zones 249 and 251. * Timing...Late Monday morning through early Monday evening. * Winds...Southwest 15 to 20 mph with gusts up to 35 mph. * Relative Humidity...As low as 9 percent. * Impacts... PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$
881 WWUS85 KBOU 250909 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 309 AM MDT Sun Apr 25 2021 ...INCREASING FIRE WEATHER CONCERNS TODAY AND MONDAY... .Elevated fire weather danger this afternoon and again Monday due to low relative humidity and strong wind gusts on the eastern plains, where there are plenty of dead winter fuels as green-up hasn't occurred yet. Conditions Monday are expected to be drier and windier than conditions Sunday. COZ246-247-252200- /O.CON.KBOU.FW.W.0007.210425T1800Z-210426T0200Z/ /O.CON.KBOU.FW.A.0005.210426T1500Z-210427T0200Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 309 AM MDT Sun Apr 25 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 246 AND 247, LINCOLN COUNTY AND EASTERN ELBERT COUNTY... ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 246 AND 247, LINCOLN COUNTY AND EASTERN ELBERT COUNTY... * Affected Area...Fire Weather Zones 246 and 247. * Timing...Sunday noon to 8 PM, then Monday late morning through early evening. * Winds...Southwest 15 to 25 mph with gusts up to 40 mph. * Relative Humidity...As low as 12 today. Even Monday with relative humidity as low as 6 percent. * Impacts...Strong winds combined with low relative humidity may cause new fire starts to rapidly spread and grow. 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. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ COZ248-250-252200- /O.EXA.KBOU.FW.A.0005.210426T1500Z-210427T0200Z/ Logan County-Sedgwick County- 309 AM MDT Sun Apr 25 2021 ...FIRE WEATHER WATCH IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 248 AND 250, LOGAN AND SEDGWICK COUNTIES... The National Weather Service in Denver has issued a Fire Weather Watch for wind and low relative humidity, which is in effect from Monday morning through Monday evening. * Affected Area...Fire Weather Zones 248 and 250. * Timing...Sunday noon to 8 PM, then Monday late morning through early evening. * Winds...Southwest 10 to 20 mph with gusts up to 30 mph. * Relative Humidity...As low as 8 percent. * Impacts...Strong winds combined with low relative humidity may cause new fire starts to rapidly spread and grow. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ COZ249-251-252200- /O.CON.KBOU.FW.A.0005.210426T1500Z-210427T0200Z/ Washington County-Phillips County- 309 AM MDT Sun Apr 25 2021 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 249 AND 251, WASHINGTON AND PHILLIPS COUNTIES... * Affected Area...Fire Weather Zones 249 and 251. * 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 8 percent. * Impacts...Strong winds combined with low relative humidity may cause new fire starts to rapidly spread and grow. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$
778 WWUS85 KBOU 251953 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 153 PM MDT Sun Apr 25 2021 ...ELEVATED FIRE DANGER THIS AFTERNOON AND MONDAY ON THE EASTERN PLAINS... .Warm, dry, and windy conditions will increase the fire danger over the eastern Colorado plains. The strongest winds will be southeast and east of Denver both afternoons. On Monday the winds will pick up earlier, with Red Flag conditions likely before noon. Over the northeast corner of Colorado, the strength of the winds are less certain so the Fire Weather Watch will remain in effect for those areas for Monday. Over the western portion of the plains closer to Denver the weather conditions will be similar, but the fuels are beginning to green up in response to the rain and snow that has fallen recently. COZ246-247-261100- /O.UPG.KBOU.FW.A.0005.210426T1500Z-210427T0200Z/ /O.NEW.KBOU.FW.W.0008.210426T1500Z-210427T0200Z/ /O.CON.KBOU.FW.W.0007.000000T0000Z-210426T0200Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 153 PM MDT Sun Apr 25 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY... ...RED FLAG WARNING IN EFFECT FROM 9 AM TO 8 PM MDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY... The National Weather Service in Denver has issued a Red Flag Warning for wind and low relative humidity, which is in effect from 9 AM to 8 PM MDT Monday. A Red Flag Warning also remains in effect through 8 PM today. * Affected Area...Fire Weather Zones 246 and 247. * Timing...Sunday noon to 8 PM, then Monday late morning through early evening. * Winds...Southwest 15 to 25 mph with gusts up to 40 mph. * Relative Humidity...As low as 6 percent. * Impacts...Strong winds combined with low relative humidity may cause new fire starts to rapidly spread and grow. 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. && $$ COZ248>251-261100- /O.CON.KBOU.FW.A.0005.210426T1500Z-210427T0200Z/ Logan County-Washington County-Sedgwick County-Phillips County- 153 PM MDT Sun Apr 25 2021 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY... * Affected Area...Fire Weather Zones 248, 249, 250 and 251. * Timing...Monday late morning through early evening. * Winds...Southwest 10 to 20 mph with gusts up to 30 mph. * Relative Humidity...As low as 7 percent. * Impacts...Strong winds combined with low relative humidity may cause new fire starts to rapidly spread and grow. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$ Gimmestad
801 WWUS85 KBOU 260206 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 806 PM MDT Sun Apr 25 2021 ...ELEVATED FIRE DANGER MONDAY ON THE EASTERN PLAINS... .On Monday the winds will pick up in the morning, with Red Flag conditions likely before noon. Over the northeast corner of Colorado, the strength of the winds are less certain so the Fire Weather Watch will remain in effect for those areas for Monday. Over the western portion of the plains closer to Denver the weather conditions will be similar, but the fuels are beginning to green up in response to the rain and snow that has fallen recently. COZ246-247-261015- /O.EXP.KBOU.FW.W.0007.000000T0000Z-210426T0200Z/ /O.CON.KBOU.FW.W.0008.210426T1500Z-210427T0200Z/ North and Northeast Elbert County Below 6000 Feet/North Lincoln County- Southeast Elbert County Below 6000 Feet/South Lincoln County- 806 PM MDT Sun Apr 25 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 9 AM TO 8 PM MDT MONDAY FOR WIND AND LOW RELATIVE HUMIDITY... ...RED FLAG WARNING HAS EXPIRED TODAY AND THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY... * Affected Area...Fire Weather Zones 246 and 247. * Timing...Sunday noon to 8 PM, then Monday late morning through early evening. * Winds...Southwest 15 to 25 mph with gusts up to 40 mph. * Relative Humidity...As low as 6 percent. * Impacts...Strong winds combined with low relative humidity may cause new fire starts to rapidly spread and grow. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$ COZ248>251-261015- /O.CON.KBOU.FW.A.0005.210426T1500Z-210427T0200Z/ Logan County-Washington County-Sedgwick County-Phillips County- 806 PM MDT Sun Apr 25 2021 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM MONDAY MORNING THROUGH MONDAY EVENING FOR WIND AND LOW RELATIVE HUMIDITY... * Affected Area...Fire Weather Zones 248, 249, 250 and 251. * Timing...Monday late morning through early evening. * Winds...Southwest 10 to 20 mph with gusts up to 35 mph. * Relative Humidity...As low as 7 percent. * Impacts...Strong winds combined with low relative humidity may cause new fire starts to rapidly spread and grow. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$
The office that day
Everything else NWS Denver/Boulder, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 24, 3:17 PM MDT | Fire Weather Watch | BOU | Elbert, Lincoln, Logan, Phillips, Sedgwick, Washington | 36 hr |
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.