Alert archive / Colorado / Red Flag Warnings in 2021
Red Flag Warning 39, NWS Grand Junction, CO
NWS Grand Junction, CO issued this red flag warning at Jul 9, 2021, 1:44 PM MDT for 4 counties in Colorado; Grand County, San Juan County, Utah. It took effect at Jul 10, 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
- Jul 9, 2021, 1:44 PM MDT (19:44 UTC)
- In effect from
- Jul 10, 2021, 12:00 PM MDT
- Expired
- Jul 10, 2021, 8:00 PM MDT
- In force
- 8 hr
- Issued by
- NWS Grand Junction, CO
Counties Dolores County, CO, La Plata County, CO, Montezuma County, CO, San Miguel County, CO, Grand County, UT, San Juan County, UT
The radar
The Grand Junction radar (KGJX), 146 km from the middle of the area, began a volume at 19:45 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
Grand Junction, CO (KGJT), launched 12:00Z, 7.7 hours before the alert went out and 147 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
- 10 J/kg
- Mixed-layer CIN
- -533 J/kg
- Mixed-layer LCL
- 3326 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 32 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
781 WWUS85 KGJT 091944 RFWGJT URGENT - FIRE WEATHER MESSAGE National Weather Service Grand Junction CO 144 PM MDT Fri Jul 9 2021 COZ207-UTZ491-101200- /O.UPG.KGJT.FW.A.0033.210710T1800Z-210711T0200Z/ /O.NEW.KGJT.FW.W.0039.210710T1800Z-210711T0200Z/ Southwest Colorado Lower Forecast Area-Southeast Utah- 144 PM MDT Fri Jul 9 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 8 PM MDT SATURDAY FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS FOR FIRE WEATHER ZONES 207 AND 491... 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 Saturday. The Fire Weather Watch is no longer in effect. * AFFECTED AREA...In Colorado, Fire Weather Zone 207 Southwest Colorado Lower Forecast Area. In Utah, Fire Weather Zone 491 Southeast Utah. * WINDS...Northwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...5 to 10 percent. * IMPACTS....Conditions may become favorable for easy ignition and rapid spread of fires due to low relative humidity and strong gusty winds in the afternoon through early 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. && $$ COZ200-202-UTZ486-487-100200- /O.CON.KGJT.FW.W.0038.000000T0000Z-210710T0200Z/ Little Snake Forecast Area-White River Forecast Area- Eastern Uinta Basin-Book Cliffs- 144 PM MDT Fri Jul 9 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS FOR FIRE WEATHER ZONES 200, 202, 486, AND 487... * AFFECTED AREA...In Colorado, Fire Weather Zone 200 Little Snake Forecast Area and Fire Weather Zone 202 White River Forecast Area. In Utah, Fire Weather Zone 486 Eastern Uinta Basin and Fire Weather Zone 487 Book Cliffs. * WINDS...West 15 to 25 mph with gusts up to 45 mph. * RELATIVE HUMIDITY...8 to 13 percent. * IMPACTS...Conditions will be favorable for easy ignition and rapid spread of fires due to low relative humidity and strong gusty winds through early evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$
4 follow-up statements
969 WWUS85 KGJT 100154 RFWGJT URGENT - FIRE WEATHER MESSAGE National Weather Service Grand Junction CO 754 PM MDT Fri Jul 9 2021 COZ200-202-UTZ486-487-100300- /O.EXP.KGJT.FW.W.0038.000000T0000Z-210710T0200Z/ Little Snake Forecast Area-White River Forecast Area- Eastern Uinta Basin-Book Cliffs- 754 PM MDT Fri Jul 9 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS FOR FIRE WEATHER ZONES 200, 202, 486, AND 487... Winds have generally decreased over the last hour across the area. Therefore, the Red Flag Warnings will be allowed to expire at 8 PM MDT. However, localized gusty winds will be possible through the evening so please continue to use caution. $$ COZ207-UTZ491-101300- /O.CON.KGJT.FW.W.0039.210710T1800Z-210711T0200Z/ Southwest Colorado Lower Forecast Area-Southeast Utah- 754 PM MDT Fri Jul 9 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 8 PM MDT SATURDAY FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS FOR FIRE WEATHER ZONES 207 AND 491... * AFFECTED AREA...In Colorado, Fire Weather Zone 207 Southwest Colorado Lower Forecast Area. In Utah, Fire Weather Zone 491 Southeast Utah. * WINDS...Northwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...5 to 10 percent. * IMPACTS....Conditions will be favorable for easy ignition and rapid spread of fires due to low relative humidity and strong gusty winds through early evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$
781 WWUS85 KGJT 100856 RFWGJT URGENT - FIRE WEATHER MESSAGE National Weather Service Grand Junction CO 256 AM MDT Sat Jul 10 2021 COZ207-UTZ491-102200- /O.CON.KGJT.FW.W.0039.210710T1800Z-210711T0200Z/ Southwest Colorado Lower Forecast Area-Southeast Utah- 256 AM MDT Sat Jul 10 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 207 AND 491... * AFFECTED AREA...In Colorado, Fire Weather Zone 207 Southwest Colorado Lower Forecast Area. In Utah, Fire Weather Zone 491 Southeast Utah. * WINDS...Northwest 10 to 20 mph with gusts up to 30 mph. * RELATIVE HUMIDITY...5 to 10 percent. * IMPACTS....Conditions will be 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 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. && $$
342 WWUS85 KGJT 101951 RFWGJT URGENT - FIRE WEATHER MESSAGE National Weather Service Grand Junction CO 151 PM MDT Sat Jul 10 2021 COZ207-UTZ491-110200- /O.CON.KGJT.FW.W.0039.000000T0000Z-210711T0200Z/ Southwest Colorado Lower Forecast Area-Southeast Utah- 151 PM MDT Sat Jul 10 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MDT THIS EVENING FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS FOR FIRE WEATHER ZONES 207 AND 491... * AFFECTED AREA...In Colorado, Fire Weather Zone 207 Southwest Colorado Lower Forecast Area. In Utah, Fire Weather Zone 491 Southeast Utah. * WINDS...North 10 to 20 mph with gusts up to 35 mph. * RELATIVE HUMIDITY...5 to 10 percent. * IMPACTS....Conditions will be favorable for easy ignition and rapid spread of fires due to low relative humidity and strong gusty winds through early evening. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. A combination of strong winds, low relative humidity, and warm temperatures can contribute to extreme fire behavior. && $$
154 WWUS85 KGJT 110156 RFWGJT URGENT - FIRE WEATHER MESSAGE National Weather Service Grand Junction CO 756 PM MDT Sat Jul 10 2021 COZ207-UTZ491-110300- /O.EXP.KGJT.FW.W.0039.000000T0000Z-210711T0200Z/ Southwest Colorado Lower Forecast Area-Southeast Utah- 756 PM MDT Sat Jul 10 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM MDT THIS EVENING FOR GUSTY WINDS, LOW RELATIVE HUMIDITY AND DRY FUELS FOR FIRE WEATHER ZONES 207 AND 491... The humidity levels will be very slow to recover...winds have dropped and will continue to do so through sunset. The Red Flag Warning will be allowed to expire on time. $$
The office that day
Everything else NWS Grand Junction, CO issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 9, 2:44 PM MDT | Flash Flood Watch | GJT | Eagle, Garfield, Moffat, Pitkin, Rio Blanco, Routt | 3 hr |
Nearby
Red Flag Warnings in Colorado, 2021Red Flag Warnings in Utah, 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.