Alert archive / Oregon / Red Flag Warnings in 2021
Red Flag Warning 45, NWS Medford, OR
NWS Medford, OR issued this red flag warning at Aug 29, 2021, 3:44 AM PDT for Harney County, Klamath County, Lake County, Oregon; Modoc County, California. It took effect at Aug 30, 2021, 2:00 PM PDT. 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
- Aug 29, 2021, 3:44 AM PDT (10:44 UTC)
- In effect from
- Aug 30, 2021, 2:00 PM PDT
- Expired
- Aug 30, 2021, 8:00 PM PDT
- In force
- 6 hr
- Issued by
- NWS Medford, OR
Counties Modoc County, CA, Harney County, OR, Klamath County, OR, Lake County, OR
The radar
The Medford radar (KMAX), 194 km from the middle of the area, began a volume at 10:51 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
Medford/Jackson, OR (KMFR), launched 00:00Z, 10.7 hours before the alert went out and 195 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
- 3689 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- 10 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
648 WWUS86 KMFR 291044 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 344 AM PDT Sun Aug 29 2021 ...Gusty Winds With Low Relative Humidity Sunday and Monday Afternoons and Evenings... .Dry and unstable conditions are expected to develop this afternoon and evening east of the Cascades as a thermal trough moves across the area. This will bring breezy conditions along with very low relative humidities to portions of the area east of the Cascades. This will be followed by a dry cold front tonight into Monday that will bring stronger, gusty winds and low RHs to a larger area east of the Cascades Monday afternoon and evening. CAZ285-ORZ624-292245- /O.UPG.KMFR.FW.A.0032.210830T2100Z-210831T0300Z/ /O.NEW.KMFR.FW.W.0045.210830T2100Z-210831T0300Z/ /O.CON.KMFR.FW.W.0044.210829T2100Z-210830T0300Z/ Modoc County Except for the Surprise Valley- Klamath Basin and the Fremont-Winema National Forest- 344 AM PDT Sun Aug 29 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM PDT THIS EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 285 AND 624... ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 8 PM PDT MONDAY FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 285 AND 624... The National Weather Service in Medford has issued a Red Flag Warning...which is in effect from 2 PM to 8 PM PDT Monday. The Fire Weather Watch is no longer in effect. * Impacts: Strong, gusty wind with low relative humidity and critically dry vegetation will greatly increase the spread potential of any new and existing fires. * Affected area: In Northern CA...Most of FWZ 285. In South Central OR...Much of Fire Zone 624. For Sunday, the Red Flag Warning is for areas east of Highway 97. For Monday, the Red Flag Warning includes areas east of Keno and areas east of Highway 97 from about Modoc Point northward. * Wind: Today, southwest through northwest winds 10 to 20 mph with gusts 20 to 30 mph. On Monday, southwest through northwest winds 15 to 25 mph with gusts 25 to 35 mph. * Minimum Relative Humidity: 8 to 14 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD * Humidity: As low as 9 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD Precautionary/preparedness actions... Avoid tossing burning cigarettes on the ground, parking hot vehicles on dry vegetation, and using equipment that can cause sparks. Follow all fire restrictions. Find links to restrictions at weather.gov/medford/wildfire. One less spark, one less wildfire. Gather your fire evacuation kit now. Collect essentials you don't want to lose and prioritize your checklist. Visit ready.gov/kit for more information. Familiarize yourself with your evacuation plan. Where will you go? How will you get there? Who will you call to let others know your are safe? Visit ready.gov/wildfires for more information. A Red Flag Warning does not mean there is a fire. It means that critical fire weather conditions are either occurring now or will shortly. These conditions promote rapid spread of fire which may become life threatening. Evacuate if ordered to, or if a fire threatens. && $$ ORZ625-292245- /O.UPG.KMFR.FW.A.0032.210830T2100Z-210831T0300Z/ /O.NEW.KMFR.FW.W.0045.210830T2100Z-210831T0300Z/ South Central Oregon Desert including the BLM Land in Eastern Lake and Western Harney Counties- 344 AM PDT Sun Aug 29 2021 ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 8 PM PDT MONDAY FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 625... The National Weather Service in Medford has issued a Red Flag Warning...which is in effect from 2 PM to 8 PM PDT Monday. The Fire Weather Watch is no longer in effect. * Impacts: Strong, gusty wind with low relative humidity and critically dry vegetation will greatly increase the spread potential of any new and existing fires. * Affected area: In South Central OR...All except the far northern portion of Fire Weather Zone 625. * Wind: West 20 to 25 mph with gusts 30 to 40 mph. * Minimum Relative Humidity: 7 to 14 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD * Humidity: As low as 7 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD Precautionary/preparedness actions... Avoid tossing burning cigarettes on the ground, parking hot vehicles on dry vegetation, and using equipment that can cause sparks. Follow all fire restrictions. Find links to restrictions at weather.gov/medford/wildfire. One less spark, one less wildfire. Gather your fire evacuation kit now. Collect essentials you don't want to lose and prioritize your checklist. Visit ready.gov/kit for more information. Familiarize yourself with your evacuation plan. Where will you go? How will you get there? Who will you call to let others know your are safe? Visit ready.gov/wildfires for more information. A Red Flag Warning does not mean there is a fire. It means that critical fire weather conditions are either occurring now or will shortly. These conditions promote rapid spread of fire which may become life threatening. Evacuate if ordered to, or if a fire threatens. && $$ Visit us at www.weather.gov/Medford
3 follow-up statements
278 WWUS86 KMFR 292058 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 158 PM PDT Sun Aug 29 2021 ...Gusty Winds With Low Relative Humidity Today and Monday Afternoons and Evenings... .Dry and unstable conditions are expected to develop this afternoon and evening east of the Cascades as a thermal trough moves across the area. This will bring breezy conditions along with very low relative humidities to portions of the area east of the Cascades. This will be followed by a dry cold front tonight into Monday that will bring stronger, gusty winds and low RHs to a larger area east of the Cascades Monday afternoon and evening. CAZ285-ORZ624-300700- /O.CON.KMFR.FW.W.0044.210829T2100Z-210830T0300Z/ /O.CON.KMFR.FW.W.0045.210830T2100Z-210831T0300Z/ Modoc County Except for the Surprise Valley- Klamath Basin and the Fremont-Winema National Forest- 158 PM PDT Sun Aug 29 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 285 AND 624... ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 8 PM PDT MONDAY FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 285 AND 624... * Impacts: Strong, gusty wind with low relative humidity and critically dry vegetation will increase the spread potential of any new and existing fires. * Affected area: In Northern CA...Most of FWZ 285. In South Central OR...Much of Fire Zone 624. For today, the Red Flag Warning is for areas east of Highway 97. For Monday, the Red Flag Warning includes areas east of Keno and areas east of Highway 97 from about Modoc Point northward. * Wind: Today, southwest through northwest winds 10 to 15 mph with gusts 20 to 25 mph. On Monday, southwest through northwest winds 10 to 20 mph with gusts 20 to 35 mph. * Minimum Relative Humidity: 8 to 14 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD $$ ORZ625-300700- /O.CON.KMFR.FW.W.0045.210830T2100Z-210831T0300Z/ South Central Oregon Desert including the BLM Land in Eastern Lake and Western Harney Counties- 158 PM PDT Sun Aug 29 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 8 PM PDT MONDAY FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 625... * Impacts: Strong, gusty wind with low relative humidity and critically dry vegetation will greatly increase the spread potential of any new and existing fires. * Affected area: In South Central OR...All except the far northern portion of Fire Weather Zone 625. * Wind: West 20 to 25 mph with gusts 30 to 35 mph. * Minimum Relative Humidity: 7 to 14 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD $$ BTL Visit us at www.weather.gov/Medford
638 WWUS86 KMFR 300334 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 834 PM PDT Sun Aug 29 2021 ...Gusty Winds With Low Relative Humidity Monday Afternoon and Evening... .A dry cold front will move into the area tonight into Monday and will bring stronger, gusty winds and low RHs to a large area east of the Cascades Monday afternoon and evening. CAZ285-ORZ624-625-310300- /O.CON.KMFR.FW.W.0045.210830T2100Z-210831T0300Z/ Modoc County Except for the Surprise Valley- Klamath Basin and the Fremont-Winema National Forest- South Central Oregon Desert including the BLM Land in Eastern Lake and Western Harney Counties- 834 PM PDT Sun Aug 29 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 8 PM PDT MONDAY FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 285... 624 AND 625... * Impacts: Strong, gusty wind with low relative humidity and critically dry vegetation will greatly increase the spread potential of any new and existing fires. * Affected area: In Northern CA...Most of Fire Weather Zone 285. In South Central OR...Much of Fire Weather Zones 624 and 625. The Red Flag Warning includes areas east of Keno and areas east of Highway 97 from about Modoc Point northward. * Wind: Southwest through northwest winds 10 to 20 mph with gusts to 35 mph. * Minimum Relative Humidity: 8 to 14 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD $$ Visit us at www.weather.gov/Medford
855 WWUS86 KMFR 310253 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 753 PM PDT Mon Aug 30 2021 CAZ285-ORZ624-625-310400- /O.EXP.KMFR.FW.W.0045.000000T0000Z-210831T0300Z/ Modoc County Except for the Surprise Valley- Klamath Basin and the Fremont-Winema National Forest- South Central Oregon Desert including the BLM Land in Eastern Lake and Western Harney Counties- 753 PM PDT Mon Aug 30 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 285...624 AND 625... Winds are diminishing across the area. $$ Visit us at www.weather.gov/Medford
The office that day
Everything else NWS Medford, OR issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 3:13 AM PDT | Hazardous Seas Warning | MFR | 59 hr |
Nearby
Red Flag Warnings in Oregon, 2021Red Flag Warnings in California, 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.