Alert archive / California / Red Flag Warnings in 2021
Red Flag Warning 41, NWS Medford, OR
NWS Medford, OR issued this red flag warning at Aug 15, 2021, 2:26 PM PDT for Modoc County, California. It took effect at Aug 16, 2021, 2:00 PM PDT. 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 15, 2021, 2:26 PM PDT (21:26 UTC)
- In effect from
- Aug 16, 2021, 2:00 PM PDT
- Expired
- Aug 16, 2021, 10:00 PM PDT
- In force
- 8 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 21:28 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, 9.4 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
- 37 J/kg
- Mixed-layer CIN
- -886 J/kg
- Mixed-layer LCL
- 1770 m above ground
- 0-6 km bulk shear
- 10 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 49 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
680 WWUS86 KMFR 152126 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 226 PM PDT Sun Aug 15 2021 ...Gusty winds with low humidities this afternoon into the evening, and Tuesday afternoon into the evening east of the Cascades... .An upper trough moves through the region through Tuesday, with increased west winds and very dry humidities in Modoc county this afternoon into the evening. Gusty west winds with continued very dry humidities return and spread into east Siskiyou, and Lake and Klamath counties Tuesday afternoon into the evening. CAZ285-161230- /O.NEW.KMFR.FW.W.0041.210816T2100Z-210817T0500Z/ /O.NEW.KMFR.FW.A.0030.210817T2100Z-210818T0500Z/ Modoc County Except for the Surprise Valley- 226 PM PDT Sun Aug 15 2021 ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 10 PM PDT MONDAY FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 285... ...FIRE WEATHER WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING 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 10 PM PDT Monday. A Fire Weather Watch has also been issued. This Fire Weather Watch is in effect from Tuesday afternoon through Tuesday evening. * 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 the Modoc National Forest. * Wind: Northwest 10 to 20 mph with gusts up to 40 mph. * Humidity: As low as 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. If you have not packed your evacuation kit yet, now is the time to do so. This includes items like important documents and essentials you cannot live without. Fill your vehicle's fuel tank. Visit ready.gov/kit for more information. Plan now to avoid using equipment that could cause sparks during the period when critical weather conditions are possible. Visit weather.gov/medford/wildfire for links to fire restrictions in your area. A Fire Weather Watch means that critical fire weather conditions are possible during the valid watch time. These conditions could promote the rapid spread of wildfires which could become life- threatening. Check weather.gov/medford for forecast updates and a possible upgrade of the this watch to a Red Flag Warning. && $$ CAZ284-ORZ624-625-161230- /O.NEW.KMFR.FW.A.0030.210817T2100Z-210818T0500Z/ Siskiyou County from the Cascade Mountains East and South to Mt Shasta-Klamath Basin and the Fremont-Winema National Forest- South Central Oregon Desert including the BLM Land in Eastern Lake and Western Harney Counties- 226 PM PDT Sun Aug 15 2021 ...FIRE WEATHER WATCH IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 284...624 AND 625... The National Weather Service in Medford has issued a Fire Weather Watch...which is in effect from Tuesday afternoon through Tuesday evening. * Impacts: Strong, gusty wind with low relative humidity and critically dry vegetation will greatly increase the spread potential of any new and existing fires. * Affected area: In Northern CA Fire Zone....284. This includes the Klamath National Forest. In South Central OR Fire Zones...624...625. This includes the Fremont-Winema National Forest. * Wind: Northwest 15 to 25 mph with gusts up to 40 mph. * Humidity: As low as 10 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD Precautionary/preparedness actions... If you have not packed your evacuation kit yet, now is the time to do so. This includes items like important documents and essentials you cannot live without. Fill your vehicle's fuel tank. Visit ready.gov/kit for more information. Plan now to avoid using equipment that could cause sparks during the period when critical weather conditions are possible. Visit weather.gov/medford/wildfire for links to fire restrictions in your area. A Fire Weather Watch means that critical fire weather conditions are possible during the valid watch time. These conditions could promote the rapid spread of wildfires which could become life- threatening. Check weather.gov/medford for forecast updates and a possible upgrade of the this watch to a Red Flag Warning. && $$ Visit us at www.weather.gov/Medford
3 follow-up statements
781 WWUS86 KMFR 161406 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 706 AM PDT Mon Aug 16 2021 CAZ285-170615- /O.CON.KMFR.FW.W.0041.210816T2100Z-210817T0500Z/ /O.CON.KMFR.FW.A.0030.210817T2100Z-210818T0500Z/ Modoc County Except for the Surprise Valley- 706 AM PDT Mon Aug 16 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 10 PM PDT THIS EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 285... ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY 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 the Modoc National Forest. * Wind: Northwest 10 to 20 mph with gusts up to 40 mph. * Humidity: As low as 10 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD $$ CAZ284-ORZ624-625-170615- /O.CON.KMFR.FW.A.0030.210817T2100Z-210818T0500Z/ Siskiyou County from the Cascade Mountains East and South to Mt Shasta-Klamath Basin and the Fremont-Winema National Forest- South Central Oregon Desert including the BLM Land in Eastern Lake and Western Harney Counties- 706 AM PDT Mon Aug 16 2021 ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM TUESDAY AFTERNOON THROUGH TUESDAY EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 284...624 AND 625... * Impacts: Strong, gusty wind with low relative humidity and critically dry vegetation will greatly increase the spread potential of any new and existing fires. * Affected area: In Northern CA Fire Zone....284. This includes the Klamath National Forest. In South Central OR Fire Zones...624...625. This includes the Fremont-Winema National Forest. * Wind: Northwest 15 to 25 mph with gusts up to 40 mph. * Humidity: As low as 10 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD $$ Visit us at www.weather.gov/Medford
697 WWUS86 KMFR 162045 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 145 PM PDT Mon Aug 16 2021 CAZ285-170845- /O.UPG.KMFR.FW.A.0030.210817T2100Z-210818T0500Z/ /O.NEW.KMFR.FW.W.0042.210817T2100Z-210818T0500Z/ /O.CON.KMFR.FW.W.0041.210816T2100Z-210817T0500Z/ Modoc County Except for the Surprise Valley- 145 PM PDT Mon Aug 16 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 10 PM PDT THIS EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 285... ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 10 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 10 PM PDT Tuesday. 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...Fire Weather Zone 285. This includes the Modoc National Forest. * Wind: Northwest 15 to 25 mph with gusts up to 40 mph. * Humidity: As low as 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. && $$ CAZ280-170845- /O.NEW.KMFR.FW.W.0042.210817T2100Z-210818T0500Z/ /O.NEW.KMFR.FW.A.0031.210818T2100Z-210819T0500Z/ Western Klamath National Forest- 145 PM PDT Mon Aug 16 2021 ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 10 PM PDT TUESDAY FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 280... ...FIRE WEATHER WATCH IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH WEDNESDAY EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 280... The National Weather Service in Medford has issued a Red Flag Warning...which is in effect from 2 PM to 10 PM PDT Tuesday. A Fire Weather Watch has also been issued. This Fire Weather Watch is in effect from Wednesday afternoon through Wednesday evening. * 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 280. This includes the Klamath National Forest. * Wind: Northeast 5 to 15 mph with gusts up to 30 mph. * Humidity: As low as 13 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. If you have not packed your evacuation kit yet, now is the time to do so. This includes items like important documents and essentials you cannot live without. Fill your vehicle's fuel tank. Visit ready.gov/kit for more information. Plan now to avoid using equipment that could cause sparks during the period when critical weather conditions are possible. Visit weather.gov/medford/wildfire for links to fire restrictions in your area. A Fire Weather Watch means that critical fire weather conditions are possible during the valid watch time. These conditions could promote the rapid spread of wildfires which could become life- threatening. Check weather.gov/medford for forecast updates and a possible upgrade of the this watch to a Red Flag Warning. && $$ CAZ284-ORZ624-625-170845- /O.UPG.KMFR.FW.A.0030.210817T2100Z-210818T0500Z/ /O.NEW.KMFR.FW.W.0042.210817T2100Z-210818T0500Z/ Siskiyou County from the Cascade Mountains East and South to Mt Shasta-Klamath Basin and the Fremont-Winema National Forest- South Central Oregon Desert including the BLM Land in Eastern Lake and Western Harney Counties- 145 PM PDT Mon Aug 16 2021 ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 10 PM PDT TUESDAY FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 284...624 AND 625... The National Weather Service in Medford has issued a Red Flag Warning...which is in effect from 2 PM to 10 PM PDT Tuesday. 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 Fire Zone....284. This includes the Klamath National Forest. In South Central OR Fire Zones...624...625. This includes the Fremont-Winema National Forest. * Wind: Northwest 15 to 25 mph with gusts up to 40 mph. * Humidity: As low as 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. && $$ Visit us at www.weather.gov/Medford
548 WWUS86 KMFR 170446 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 946 PM PDT Mon Aug 16 2021 CAZ285-172200- /O.EXP.KMFR.FW.W.0041.000000T0000Z-210817T0500Z/ /O.CON.KMFR.FW.W.0042.210817T2100Z-210818T0500Z/ Modoc County Except for the Surprise Valley- 946 PM PDT Mon Aug 16 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 10 PM PDT TUESDAY FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 285... * Impacts: Strong, gusty wind with low relative humidity and critically dry vegetation will greatly increase the spread potential of any new and existing fires. * Affected area: In Northern CA...Fire Weather Zone 285. This includes the Modoc National Forest * Wind: Northwest 15 to 25 mph with gusts up to 40 mph. * Humidity: As low as 10 percent. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD Precautionary/preparedness actions... Avoid tossing burning cigarettes on the ground, parking hot vehicles on dry vegetation, and using equipment that can cause sparks. Follow all fire restrictions. Find links to restrictions at weather.gov/medford/wildfire. One less spark, one less wildfire. Gather your fire evacuation kit now. Collect essentials you don't want to lose and prioritize your checklist. Visit ready.gov/kit for more information. Familiarize yourself with your evacuation plan. Where will you go? How will you get there? Who will you call to let others know your are safe? Visit ready.gov/wildfires for more information. A Red Flag Warning does not mean there is a fire. It means that critical fire weather conditions are either occurring now or will shortly. These conditions promote rapid spread of fire which may become life threatening. Evacuate if ordered to, or if a fire threatens. && $$ CAZ280-172200- /O.CON.KMFR.FW.W.0042.210817T2100Z-210818T0500Z/ /O.CON.KMFR.FW.A.0031.210818T2100Z-210819T0500Z/ Western Klamath National Forest- 946 PM PDT Mon Aug 16 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 10 PM PDT TUESDAY FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 280... ...FIRE WEATHER WATCH REMAINS IN EFFECT FROM WEDNESDAY AFTERNOON THROUGH WEDNESDAY EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONE 280... * 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...Portions of Fire Weather Zone 280 in the horn of Western Siskiyou County. This includes the Klamath National Forest. * Wind: Northeast 5 to 15 mph with gusts up to 30 mph. * Humidity: As low as 13 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. $$ CAZ284-ORZ624-625-172200- /O.CON.KMFR.FW.W.0042.210817T2100Z-210818T0500Z/ Siskiyou County from the Cascade Mountains East and South to Mt Shasta-Klamath Basin and the Fremont-Winema National Forest- South Central Oregon Desert including the BLM Land in Eastern Lake and Western Harney Counties- 946 PM PDT Mon Aug 16 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM TO 10 PM PDT TUESDAY FOR STRONG GUSTY WIND WITH LOW RH FOR FIRE WEATHER ZONES 284...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 areas: In Northern CA, Northeast portions of Fire Zone 284. This includes north and eastern portions of the Antelope Fire and the Klamath National Forest. In South Central OR, Most of Fire Zone 624 and Southern Fire Zone 625. This includes the Patton Meadow Fire and the Fremont-Winema National Forest. * Wind: Northwest 15 to 25 mph with gusts up to 40 mph. * Humidity: As low as 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. $$ 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 15, 2:26 PM PDT | Fire Weather Watch | MFR | Modoc, Siskiyou | 23 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.