Alert archive / California / Red Flag Warnings in 2021
Red Flag Warning 43, NWS Medford, OR
NWS Medford, OR issued this red flag warning at Aug 23, 2021, 1:06 PM PDT for Modoc County, California. It took effect at Aug 24, 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 23, 2021, 1:06 PM PDT (20:06 UTC)
- In effect from
- Aug 24, 2021, 2:00 PM PDT
- Expired
- Aug 24, 2021, 8:00 PM PDT
- In force
- 6 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 20:09 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, 8.1 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
- 1115 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 89 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
815 WWUS86 KMFR 232006 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 106 PM PDT Mon Aug 23 2021 CAZ285-240815- /O.NEW.KMFR.FW.W.0043.210824T2100Z-210825T0300Z/ Modoc County Except for the Surprise Valley- 106 PM PDT Mon Aug 23 2021 ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 8 PM PDT TUESDAY 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 2 PM to 8 PM PDT Tuesday. * 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. This includes northern and central Modoc County as well as the Warner Mountains in eastern Modoc County. * Wind: Southwest 12 to 18 mph with gusts of 20 to 30 mph. * 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. && $$ Visit us at www.weather.gov/Medford
2 follow-up statements
378 WWUS86 KMFR 240757 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 1257 AM PDT Tue Aug 24 2021 CAZ285-250300- /O.CON.KMFR.FW.W.0043.210824T2100Z-210825T0300Z/ Modoc County Except for the Surprise Valley- 1257 AM PDT Tue Aug 24 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 8 PM PDT THIS EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 285... * Impacts: Strong, gusty wind with low relative humidity and critically dry vegetation will greatly increase the spread potential of any new and existing fires. * Affected area: In Northern CA...Fire Weather Zone 285. This includes northern and central Modoc County as well as the Warner Mountains in eastern Modoc County. * Wind: Southwest 12 to 18 mph with gusts up to 30 mph. * Humidity: As low as 9 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD Precautionary/preparedness actions... Avoid tossing burning cigarettes on the ground, parking hot vehicles on dry vegetation, and using equipment that can cause sparks. Follow all fire restrictions. Find links to restrictions at weather.gov/medford/wildfire. One less spark, one less wildfire. Gather your fire evacuation kit now. Collect essentials you don't want to lose and prioritize your checklist. Visit ready.gov/kit for more information. Familiarize yourself with your evacuation plan. Where will you go? How will you get there? Who will you call to let others know your are safe? Visit ready.gov/wildfires for more information. A Red Flag Warning does not mean there is a fire. It means that critical fire weather conditions are either occurring now or will shortly. These conditions promote rapid spread of fire which may become life threatening. Evacuate if ordered to, or if a fire threatens. $$ Visit us at www.weather.gov/Medford
744 WWUS86 KMFR 250321 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 821 PM PDT Tue Aug 24 2021 CAZ285-250430- /O.EXP.KMFR.FW.W.0043.000000T0000Z-210825T0300Z/ Modoc County Except for the Surprise Valley- 821 PM PDT Tue Aug 24 2021 ...RED FLAG WARNING HAS EXPIRED FOR FOR GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 285... Conditions have improved, and the Red Flag has been allowed to expire. $$ Visit us at www.weather.gov/Medford
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.