Alert archive / Colorado / Red Flag Warnings in 2018
Red Flag Warning 9, NWS Denver/Boulder, CO
NWS Denver/Boulder, CO issued this red flag warning at Mar 8, 2018, 3:06 PM MST for Larimer County, Logan County, Weld County, Colorado. It took effect at Mar 9, 2018, 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
- Mar 8, 2018, 3:06 PM MST (22:06 UTC)
- In effect from
- Mar 9, 2018, 12:00 PM MST
- Expired
- Mar 9, 2018, 6:00 PM MST
- In force
- 6 hr
- Issued by
- NWS Denver/Boulder, CO
Counties Larimer County, CO, Logan County, CO, Weld County, CO
The radar
The Cheyenne radar (KCYS), 69 km from the middle of the area, began a volume at 22:08 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 (KDEN), launched 12:00Z, 10.1 hours before the alert went out and 127 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
- 3425 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 64 m²/s²
- 0-3 km storm-relative helicity
- 106 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
975 WWUS85 KBOU 082206 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 306 PM MST Thu Mar 8 2018 ...RED FLAG WARNING FOR THE NORTHERN PLAINS FRIDAY AFTERNOON... .Warm temperatures will bring relative humidities in the low teens Friday, while west winds will increase along the northern Colorado border with gusts up to 40 mph possible. COZ238-242-248-091200- /O.UPG.KBOU.FW.A.0006.180309T1900Z-180310T0100Z/ /O.NEW.KBOU.FW.W.0009.180309T1900Z-180310T0100Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County-Logan County- 306 PM MST Thu Mar 8 2018 ...RED FLAG WARNING IN EFFECT FROM NOON TO 6 PM MST FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR A PORTION OF THE NORTHEAST COLORADO PLAINS...FIRE WEATHER ZONES 238...242...AND 248... 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 MST Friday. The Fire Weather Watch is no longer in effect. * Affected Area...Fire Weather Zones 238...242 and 248. * Timing...Early afternoon through early evening. * Winds...Northwest 15 to 25 mph with gusts up to 40 mph. * Relative Humidity...As low as 14 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. 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. && $$ Gimmestad
4 follow-up statements
110 WWUS85 KBOU 090421 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 921 PM MST Thu Mar 8 2018 ...RED FLAG WARNING FOR THE NORTHERN PLAINS FRIDAY AFTERNOON... .Warm temperatures will bring relative humidities in the low teens Friday, while west winds will increase along the northern Colorado border with gusts up to 40 mph possible. COZ238-242-248-091230- /O.CON.KBOU.FW.W.0009.180309T1900Z-180310T0100Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County-Logan County- 921 PM MST Thu Mar 8 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 6 PM MST FRIDAY FOR WIND AND LOW RELATIVE HUMIDITY FOR A PORTION OF THE NORTHEAST COLORADO PLAINS...FIRE WEATHER ZONES 238...242...AND 248... * Affected Area...Fire Weather Zones 238...242 and 248. * Timing...Early afternoon through early evening. * Winds...Northwest 15 to 25 mph with gusts up to 40 mph. * Relative Humidity...As low as 14 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
972 WWUS85 KBOU 091029 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 329 AM MST Fri Mar 9 2018 ...RED FLAG WARNING FOR THE NORTHERN PLAINS THIS AFTERNOON... .Warm temperatures will bring relative humidities in the low teens today, while west winds will increase along the northern Colorado border with gusts up to 40 mph possible. COZ238-242-248-092200- /O.CON.KBOU.FW.W.0009.180309T1900Z-180310T0100Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County-Logan County- 329 AM MST Fri Mar 9 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 6 PM MST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR A PORTION OF THE NORTHEAST COLORADO PLAINS...FIRE WEATHER ZONES 238...242... AND 248... * Affected Area...Fire Weather Zones 238...242 and 248. * Timing...Early afternoon through early evening. * Winds...Northwest 15 to 25 mph with gusts up to 40 mph. * Relative Humidity...As low as 13 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. 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. && $$
873 WWUS85 KBOU 092157 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 257 PM MST Fri Mar 9 2018 ...RED FLAG WARNING FOR THE NORTHERN PLAINS THIS AFTERNOON... .Warm temperatures will bring relative humidities in the low teens today, while west winds will increase along the northern Colorado border with gusts up to 40 mph possible. COZ238-242-248-100100- /O.CON.KBOU.FW.W.0009.000000T0000Z-180310T0100Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County-Logan County- 257 PM MST Fri Mar 9 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 6 PM MST THIS EVENING FOR WIND AND LOW RELATIVE HUMIDITY FOR A PORTION OF THE NORTHEAST COLORADO PLAINS...FIRE WEATHER ZONES 238...242...AND 248... * Affected Area...Fire Weather Zones 238...242 and 248. * Timing...Early afternoon through 6 pm. * Winds...Northwest 15 to 25 mph with gusts up to 40 mph. * Relative Humidity...As low as 13 percent. * Impacts...Conditions will be favorable for new fire starts and rapid growth of fires. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now....or will shortly. A combination of strong winds...low relative humidity...and warm temperatures can contribute to extreme fire behavior. && $$
855 WWUS85 KBOU 100106 RFWBOU URGENT - FIRE WEATHER MESSAGE National Weather Service Denver/Boulder CO 606 PM MST Fri Mar 9 2018 COZ238-242-248-100215- /O.EXP.KBOU.FW.W.0009.000000T0000Z-180310T0100Z/ Larimer County Below 6000 Feet/Northwest Weld County- Northeast Weld County-Logan County- 606 PM MST Fri Mar 9 2018 ...RED FLAG WARNING HAS EXPIRED FOR WIND AND LOW RELATIVE HUMIDITY FOR A PORTION OF THE NORTHEAST PLAINS...FIRE WEATHER ZONES 238...242 AND 248... CONDITIONS ARE EXPECTED TO GRADUALLY IMPROVE THROUGH THE EVENING THEREFORE THE RED FLAG WARNING HAS BEEN ALLOWED TO EXPIRE. $$
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.