Alert archive / Colorado / Red Flag Warnings in 2021
Red Flag Warning 41, NWS Grand Junction, CO
NWS Grand Junction, CO issued this red flag warning at Aug 23, 2021, 2:21 PM MDT for Moffat County, Rio Blanco County, Colorado. It took effect at Aug 24, 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
- Aug 23, 2021, 2:21 PM MDT (20:21 UTC)
- In effect from
- Aug 24, 2021, 12:00 PM MDT
- Expired
- Aug 24, 2021, 7:47 PM MDT
- In force
- 8 hr
- Issued by
- NWS Grand Junction, CO
Counties Moffat County, CO, Rio Blanco County, CO
The radar
The Grand Junction radar (KGJX), 138 km from the middle of the area, began a volume at 20:25 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
Grand Junction, CO (KGJT), launched 12:00Z, 8.4 hours before the alert went out and 132 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
- 14 J/kg
- Mixed-layer CIN
- -372 J/kg
- Mixed-layer LCL
- 2678 m above ground
- 0-6 km bulk shear
- 37 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 104 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
615 WWUS85 KGJT 232021 RFWGJT URGENT - FIRE WEATHER MESSAGE National Weather Service Grand Junction CO 221 PM MDT Mon Aug 23 2021 COZ200-202-241200- /O.UPG.KGJT.FW.A.0035.210824T1800Z-210825T0200Z/ /O.NEW.KGJT.FW.W.0041.210824T1800Z-210825T0200Z/ /O.NEW.KGJT.FW.A.0036.210825T1800Z-210826T0200Z/ Little Snake Forecast Area-White River Forecast Area- 221 PM MDT Mon Aug 23 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM MDT TUESDAY FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS FOR FIRE WEATHER ZONES 200 AND 202... ...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH WEDNESDAY EVENING FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS FOR FIRE WEATHER ZONES 200 AND 202... The National Weather Service in Grand Junction has issued a Red Flag Warning for gusty winds, low relative humidity and dry fuels, which is in effect from noon to 8 PM MDT Tuesday. A Fire Weather Watch has also been issued. This Fire Weather Watch for gusty winds, low relative humidity and dry fuels is in effect from Wednesday afternoon through Wednesday evening. * AFFECTED AREA...In Colorado, Fire Weather Zone 200 Little Snake Forecast Area and Fire Weather Zone 202 White River Forecast Area. * WINDS...South 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...10 to 15 percent. * IMPACTS...Conditions will become favorable for easy ignition and rapid spread of fires due to low relative humidity and strong gusty winds through early evening Tuesday. Similar conditions may redevelop Wednesday afternoon and evening. 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. && $$
3 follow-up statements
400 WWUS85 KGJT 240826 RFWGJT URGENT - FIRE WEATHER MESSAGE National Weather Service Grand Junction CO 226 AM MDT Tue Aug 24 2021 COZ200-202-242300- /O.CON.KGJT.FW.W.0041.210824T1800Z-210825T0200Z/ /O.CON.KGJT.FW.A.0036.210825T1800Z-210826T0200Z/ Little Snake Forecast Area-White River Forecast Area- 226 AM MDT Tue Aug 24 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 8 PM MDT THIS EVENING FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS FOR FIRE WEATHER ZONES 200 AND 202... ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH WEDNESDAY EVENING FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS FOR FIRE WEATHER ZONES 200 AND 202... * AFFECTED AREA...In Colorado, Fire Weather Zone 200 Little Snake Forecast Area and Fire Weather Zone 202 White River Forecast Area. * WINDS...Southwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...10 to 15 percent. * IMPACTS...Conditions will become favorable for easy ignition and rapid spread of fires due to low relative humidity and strong gusty winds through early evening. Similar conditions may redevelop Wednesday afternoon and evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$
420 WWUS85 KGJT 241927 RFWGJT URGENT - FIRE WEATHER MESSAGE National Weather Service Grand Junction CO 127 PM MDT Tue Aug 24 2021 COZ200-202-251200- /O.CON.KGJT.FW.W.0041.000000T0000Z-210825T0200Z/ /O.CON.KGJT.FW.A.0036.210825T1800Z-210826T0200Z/ Little Snake Forecast Area-White River Forecast Area- 127 PM MDT Tue Aug 24 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS FOR FIRE WEATHER ZONES 200 AND 202... ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH WEDNESDAY EVENING FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS FOR FIRE WEATHER ZONES 200 AND 202... * AFFECTED AREA...In Colorado, Fire Weather Zone 200 Little Snake Forecast Area and Fire Weather Zone 202 White River Forecast Area. * WINDS...Southwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...10 to 15 percent. * IMPACTS...Conditions will become favorable for easy ignition and rapid spread of fires due to low relative humidity and strong gusty winds through early evening. Similar conditions may redevelop Wednesday afternoon and evening. 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. && $$
461 WWUS85 KGJT 250147 RFWGJT URGENT - FIRE WEATHER MESSAGE National Weather Service Grand Junction CO 747 PM MDT Tue Aug 24 2021 COZ200-202-251000- /O.CAN.KGJT.FW.W.0041.000000T0000Z-210825T0200Z/ /O.CON.KGJT.FW.A.0036.210825T1800Z-210826T0200Z/ Little Snake Forecast Area-White River Forecast Area- 747 PM MDT Tue Aug 24 2021 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH WEDNESDAY EVENING FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS FOR FIRE WEATHER ZONES 200 AND 202... * AFFECTED AREA...In Colorado, Fire Weather Zone 200 Little Snake Forecast Area and Fire Weather Zone 202 White River Forecast Area. * WINDS...South 10 to 20 mph with gusts up to 30 mph possible. * RELATIVE HUMIDITY...8 to 13 percent. * IMPACTS...Conditions may become favorable for easy ignition and rapid spread of fires due to low relative humidity and strong gusty winds through early evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Fire Weather Watch means that critical fire weather conditions are forecast to occur. Listen for later forecasts and possible Red Flag Warnings. && $$
The office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 2:21 PM MDT | Fire Weather Watch | GJT | Moffat, Rio Blanco | 35 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.