Alert archive / California / Red Flag Warnings in 2021
Red Flag Warning 28, NWS Medford, OR
NWS Medford, OR issued this red flag warning at Jul 21, 2021, 1:32 PM PDT for Modoc County, California. It took effect at Jul 22, 2021, 3:00 PM PDT. It was in force for 5 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 21, 2021, 1:32 PM PDT (20:32 UTC)
- In effect from
- Jul 22, 2021, 3:00 PM PDT
- Expired
- Jul 22, 2021, 8:00 PM PDT
- In force
- 5 hr
- Issued by
- NWS Medford, OR
County Modoc County, CA
The radar
The Medford radar (KMAX), 174 km from the middle of the area, began a volume at 20:34 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 12:00Z, 8.5 hours before the alert went out and 192 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
- 1008 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- -3 m²/s²
- 0-3 km storm-relative helicity
- 139 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
339 WWUS86 KMFR 212032 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 132 PM PDT Wed Jul 21 2021 CAZ285-221200- /O.UPG.KMFR.FW.A.0022.210722T2100Z-210723T0300Z/ /O.NEW.KMFR.FW.W.0028.210722T2200Z-210723T0300Z/ /O.CON.KMFR.FW.W.0027.210721T2100Z-210722T0300Z/ Modoc County Except for the Surprise Valley- 132 PM PDT Wed Jul 21 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 285... ...RED FLAG WARNING IN EFFECT FROM 3 PM TO 8 PM PDT THURSDAY FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 285... The National Weather Service in Medford has issued a Red Flag Warning...which is in effect from 3 PM to 8 PM PDT Thursday. The Fire Weather Watch is no longer in effect.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... All of Fire Weather Zone 285 except for the north west portion. * Wind: West 10 to 15 mph with gusts up to 25 mph. * Humidity: 8 - 10 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD Precautionary/preparedness actions... 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. && $$ ORZ624-220300- /O.CON.KMFR.FW.W.0027.210721T2100Z-210722T0300Z/ Klamath Basin and the Fremont-Winema National Forest- 132 PM PDT Wed Jul 21 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT THIS EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 624... * Impacts: Strong, gusty wind with low relative humidity and critically dry vegetation will greatly increase the spread potential of any new and existing fires. * Affected area: In South Central OR...The southern portions of Fire Weather Zone 624 in Lake County, including Lakeview. * Wind: West 10 to 15 mph with gusts up to 30 mph. * Humidity: 8 - 12 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD Precautionary/preparedness actions... Gather your fire evacuation kit now. Collect essentials you don't want to lose and prioritize your checklist. Visit ready.gov/kit for more information. Familiarize yourself with your evacuation plan. Where will you go? How will you get there? Who will you call to let others know your are safe? Visit ready.gov/wildfires for more information. A Red Flag Warning does not mean there is a fire. It means that critical fire weather conditions are either occurring now or will shortly. These conditions promote rapid spread of fire which may become life threatening. Evacuate if ordered to, or if a fire threatens. $$
3 follow-up statements
539 WWUS86 KMFR 220258 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 758 PM PDT Wed Jul 21 2021 CAZ285-221400- /O.EXP.KMFR.FW.W.0027.000000T0000Z-210722T0300Z/ /O.CON.KMFR.FW.W.0028.210722T2200Z-210723T0300Z/ Modoc County Except for the Surprise Valley- 758 PM PDT Wed Jul 21 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 3 PM TO 8 PM PDT THURSDAY FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 285... ...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 285... * 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...Fire Weather Zone 285. * Wind: West 5 to 15 mph with gusts up to 25 mph. * Humidity: 8 to 10 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. && $$ ORZ624-220400- /O.EXP.KMFR.FW.W.0027.000000T0000Z-210722T0300Z/ Klamath Basin and the Fremont-Winema National Forest- 758 PM PDT Wed Jul 21 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 624... While humidities will be low again on Thursday, winds are not expected to be strong enough to create critical conditions. $$ Visit us at www.weather.gov/Medford
221 WWUS86 KMFR 221045 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 345 AM PDT Thu Jul 22 2021 CAZ285-230300- /O.CON.KMFR.FW.W.0028.210722T2200Z-210723T0300Z/ Modoc County Except for the Surprise Valley- 345 AM PDT Thu Jul 22 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 3 PM THIS AFTERNOON TO 8 PM PDT THIS EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 285... * 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 from Tionesta east. * Wind: West 10 to 15 mph with gusts up to 25 mph. * Humidity: 7 to 12 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. $$ Visit us at www.weather.gov/Medford
274 WWUS86 KMFR 230250 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 750 PM PDT Thu Jul 22 2021 CAZ285-230400- /O.EXP.KMFR.FW.W.0028.000000T0000Z-210723T0300Z/ Modoc County Except for the Surprise Valley- 750 PM PDT Thu Jul 22 2021 ...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT THIS EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 285... The Red Flag Warning will expire at 8 PM PDT. Conditions will remain dry during the next few days, but afternoon and evening winds will not be as strong. $$ 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 |
|---|---|---|---|---|
| Jul 21, 1:29 AM PDT | Fire Weather Watch | MFR | Modoc | 12 hr |
Nearby
Red 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.