Alert archive / California / Red Flag Warnings in 2021
Red Flag Warning 11, NWS Medford, OR
NWS Medford, OR issued this red flag warning at Jun 23, 2021, 2:15 PM PDT for Modoc County, Siskiyou County, California. It took effect at Jun 24, 2021, 12:00 PM PDT. It was in force for 7 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
- Jun 23, 2021, 2:15 PM PDT (21:15 UTC)
- In effect from
- Jun 24, 2021, 12:00 PM PDT
- Expired
- Jun 24, 2021, 7:00 PM PDT
- In force
- 7 hr
- Issued by
- NWS Medford, OR
Counties Modoc County, CA, Siskiyou County, CA
The radar
The Medford radar (KMAX), 105 km from the middle of the area, began a volume at 21:16 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, 9.3 hours before the alert went out and 130 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
- 1648 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 12 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
777 WWUS86 KMFR 232115 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 215 PM PDT Wed Jun 23 2021 ...Abundant Lightning Expected This Afternoon and Evening Over Portions of Northwestern CA and Southwestern OR... ...Scattered Thunderstorms Expected over Northern California Thursday Afternoon and Evening... .Low pressure centered off of the California coast is sending a couple of disturbances northwestward through the forecast area this afternoon and evening. These disturbances are expected to bring isolated to scattered thunderstorms on dry fuels over portions of western Siskiyou County and along the Siskiyou mountains in Fire Weather Zones 280 and 621, as well as the Cascades in northern FWZ 623, and northern and central portions of FWZs 624 and 625. Isolated storms will be expected over a wider portion of Southern Oregon and Northern California. While most storms will produce rainfall that will be wetting in storm cores, significant lightning on dry fuels is expected. Scattered thunderstorms are expected again Thursday afternoon into the early evening across northern California. CAZ280-241400- /O.UPG.KMFR.FW.A.0009.210624T2100Z-210625T0600Z/ /O.NEW.KMFR.FW.W.0011.210624T1900Z-210625T0200Z/ /O.CON.KMFR.FW.W.0010.000000T0000Z-210624T0600Z/ Western Klamath National Forest- 215 PM PDT Wed Jun 23 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONE 280... ...RED FLAG WARNING IN EFFECT FROM NOON TO 7 PM PDT THURSDAY FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONE 280... The National Weather Service in Medford has issued a Red Flag Warning...which is in effect from noon to 7 PM PDT Thursday. A Red Flag Warning for abundant lightning on dry fuels also remains in effect through 11 PM PDT this evening. * Impacts: Lightning and high fire danger is likely to result in new fire starts. Gusty thunderstorm winds could contribute to fire spread. Despite some rainfall that could be locally significant, initial attack resources could be overwhelmed and holdover fires are possible. * Affected area: In Northern CA...Fire Weather Zone 280. * Wind: Gusty outflow wind gusts in the 20 to 40 mph range are possible. * Thunderstorms: Isolated dry thunderstorms are possible, but most of the thunderstorms are likely to produce at least some rainfall. * Additional Information: Thunderstorms today are expected to generally move from southeast to northwest. Thunderstorms Thursday are expected to move generally from east to west. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD Precautionary/preparedness actions... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. Lightning strikes with little or no precipitation combined with dry fuels create conditions where many fire starts may occur in a short period of time. 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. && $$ CAZ281-282-284-285-241400- /O.UPG.KMFR.FW.A.0009.210624T2100Z-210625T0600Z/ /O.NEW.KMFR.FW.W.0011.210624T1900Z-210625T0200Z/ Central Siskiyou County Including Shasta Valley-Shasta- Trinity National Forest in Siskiyou County- Siskiyou County from the Cascade Mountains East and South to Mt Shasta-Modoc County Except for the Surprise Valley- 215 PM PDT Wed Jun 23 2021 ...RED FLAG WARNING IN EFFECT FROM NOON TO 7 PM PDT THURSDAY FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 281...282... 284 AND 285... The National Weather Service in Medford has issued a Red Flag Warning...which is in effect from noon to 7 PM PDT Thursday. * Impacts: Lightning and high fire danger are likely to result in new fire starts. Gusty thunderstorm winds could contribute to fire spread. Despite some rainfall that could be locally significant, initial attack resources could be overwhelmed and holdover fires are possible. * Affected area: In Northern CA...Fire Weather Zones 281...282...284 and 285. * Wind: Gusty outflow wind gusts in the 20 to 40 mph range are possible. * Thunderstorms: Scattered thunderstorms are expected. Isolated dry thunderstorms are also possible, but most are likely to produce at least some rainfall. * Additional Information: Thunderstorms Thursday are expected to move generally from east to west. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD Precautionary/preparedness actions... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. Lightning strikes with little or no precipitation combined with dry fuels create conditions where many fire starts may occur in a short period of time. 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. && $$ ORZ623>625-240600- /O.CON.KMFR.FW.W.0010.000000T0000Z-210624T0600Z/ Southern Oregon Cascades-Klamath Basin and the Fremont- Winema National Forest- South Central Oregon Desert including the BLM Land in Eastern Lake and Western Harney Counties- 215 PM PDT Wed Jun 23 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 623... 624 AND 625... * Impacts: Lightning and high fire danger are likely to result in new fire starts. Gusty thunderstorm winds could contribute to fire spread. Despite some rainfall that could be locally significant, initial attack resources could be overwhelmed and holdover fires are possible. * Affected area: In South Central OR Fire Zones...624...625. In Southwest OR Fire Zone....623. * Wind: Gusty outflow wind gusts in the 30 to 50 mph range are possible. * Thunderstorms: Isolated dry thunderstorms are possible, but most are likely to produce at least some rainfall. * Additional Information: Thunderstorms today are expected to generally move from southeast to northwest. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD Precautionary/preparedness actions... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. Lightning strikes with little or no precipitation combined with dry fuels create conditions where many fire starts may occur in a short period of time. 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. $$ ORZ621-240600- /O.CON.KMFR.FW.W.0010.000000T0000Z-210624T0600Z/ Siskiyou Mountains- 215 PM PDT Wed Jun 23 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONE 621... * Impacts: Lightning and high fire danger are likely to result in new fire starts. Gusty thunderstorm winds could contribute to fire spread. Despite rainfall, initial attack resources could be overwhelmed and holdover fires are possible. * Affected area: In Southwest OR...Fire Weather Zone 621. * Wind: Gusty outflow wind gusts in the 20 to 40 mph range are possible. * Thunderstorms: Isolated dry thunderstorms are possible, but most are likely to produce at least some rainfall. * Additional Information: Thunderstorms today are expected to generally move from southeast to northwest. Thunderstorms Thursday are expected to move generally from east to west. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD Precautionary/preparedness actions... A Red Flag Warning means that critical fire weather conditions are either occurring now, or will shortly. Lightning strikes with little or no precipitation combined with dry fuels create conditions where many fire starts may occur in a short period of time. Gather your fire evacuation kit now. Collect essentials you don't want to lose and prioritize your checklist. Visit ready.gov/kit for more information. Familiarize yourself with your evacuation plan. Where will you go? How will you get there? Who will you call to let others know your are safe? Visit ready.gov/wildfires for more information. $$ BTL Visit us at www.weather.gov/Medford
4 follow-up statements
312 WWUS86 KMFR 240515 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 1015 PM PDT Wed Jun 23 2021 ...Abundant Lightning Expected This Evening Over Portions of Northern Lake and Klamath County... ...Scattered Thunderstorms Expected over Northern California Thursday Afternoon and Evening... .The low will move southward Thursday focusing scattered thunderstorm activity over Northern California. Signals are a bit mixed in the models, with some models hitting the Modoc area harder than Siskiyou County and others doing the opposite. We expect thunderstorms on Thursday to begin early and then end earlier than normal. CAZ280-241715- /O.CAN.KMFR.FW.W.0010.000000T0000Z-210624T0600Z/ /O.CON.KMFR.FW.W.0011.210624T1900Z-210625T0200Z/ Western Klamath National Forest- 1015 PM PDT Wed Jun 23 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM PDT THURSDAY FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONE 280... ...RED FLAG WARNING FOR TODAY HAS BEEN EXPIRED FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONE 280... The National Weather Service in Medford has cancelled the Red Flag Warning. * Impacts: Lightning and high fire danger will likely result in new fire starts. Gusty thunderstorm winds could contribute to fire spread. Despite rainfall, initial attack resources could be overwhelmed and holdover fires are possible. * Affected area: In Northern CA...Fire Weather Zone 280, including the Klamath National Forest, Marble Mountains, Scott Bar Mountains and the communities of Happy Camp, Seiad Valley, Etna, and Fort Jones. * Wind: Gusty, quickly shifting outflow wind gusts to 40 mph range are possible. * Thunderstorms: Isolated dry thunderstorms are possible, but most of the thunderstorms are likely to produce at least some rainfall. * Additional Information: Thunderstorms Thursday are expected to move generally from east to west. * 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. && $$ ORZ621-623-240615- /O.CAN.KMFR.FW.W.0010.000000T0000Z-210624T0600Z/ Siskiyou Mountains-Southern Oregon Cascades- 1015 PM PDT Wed Jun 23 2021 ...RED FLAG WARNING HAS BEEN EXPIRED FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 621 AND 623... Thunderstorms have ceased for this evening. Isolated storms are possible again Thursday afternoon in the southeast portion of zone 623. $$ ORZ624-625-240615- /O.CON.KMFR.FW.W.0010.000000T0000Z-210624T0600Z/ Klamath Basin and the Fremont-Winema National Forest- South Central Oregon Desert including the BLM Land in Eastern Lake and Western Harney Counties- 1015 PM PDT Wed Jun 23 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 624 AND 625... * Impacts: Lightning and high fire danger will likely result in new fire starts. Gusty thunderstorm winds could contribute to fire spread. Despite rainfall, initial attack resources could be overwhelmed and holdover fires are possible. * Affected area: In South Central OR...Fire Weather Zones 624 and 625 including the Fremont National Forest, the communities of Chemult, Fort Rock and others within the Christmas Valley. * Wind: Gusty, quickly shifting outflow wind gusts up to 40 mph range are possible. * Thunderstorms: Isolated dry thunderstorms are possible, but most are likely to produce at least some rainfall. * Additional Information: Isolated thunderstorm activity could continue after 11 PM, but confidence is not high and storms should be short lived. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD $$ CAZ281-282-284-285-241715- /O.CON.KMFR.FW.W.0011.210624T1900Z-210625T0200Z/ Central Siskiyou County Including Shasta Valley-Shasta- Trinity National Forest in Siskiyou County- Siskiyou County from the Cascade Mountains East and South to Mt Shasta-Modoc County Except for the Surprise Valley- 1015 PM PDT Wed Jun 23 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM PDT THURSDAY FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 281...282...284 AND 285... * Impacts: Lightning and high fire danger will likely result in new fire starts. Gusty thunderstorm winds could contribute to fire spread. Despite rainfall, initial attack resources could be overwhelmed and holdover fires are possible. * Affected area: In Northern CA...Fire Weather Zones 281...282...284 and 285, this includes the the Klamath National Forest, Marble Mountains, Scott Bar Mountains, Shasta National Forest, Modoc National Forest, Lava Beds National Monument and the communities of Happy Camp, Seiad Valley, Etna, Fort Jones, Weed, Mt. Shasta City, Tennant, Canby, Alturas, and Willow Ranch. * Wind: Gusty, quickly shifting outflow wind gusts up to 40 mph range are possible. * Thunderstorms: Scattered thunderstorms are expected. Isolated dry thunderstorms are also possible, but most are likely to produce at least some rainfall. * Additional Information: Thunderstorms Thursday are expected to move generally from east to west. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD $$ Visit us at www.weather.gov/Medford
076 WWUS86 KMFR 240603 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 1103 PM PDT Wed Jun 23 2021 ...Scattered Thunderstorms Expected over Northern California Thursday Afternoon and Evening... .The low will move southward Thursday focusing scattered thunderstorm activity over Northern California. Signals are a bit mixed in the models, with some models hitting the Modoc area harder than Siskiyou County and others doing the opposite. We expect thunderstorms on Thursday to begin early and then end earlier than normal. ORZ624-625-240715- /O.EXP.KMFR.FW.W.0010.000000T0000Z-210624T0600Z/ Klamath Basin and the Fremont-Winema National Forest- South Central Oregon Desert including the BLM Land in Eastern Lake and Western Harney Counties- 1103 PM PDT Wed Jun 23 2021 ...RED FLAG WARNING WILL EXPIRE AT 11 PM PDT THIS EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 624 AND 625... A few lingering storms in central zone 625 may produce a few more strikes in the next one to two hours. A slight chance for isolated storms does remain in the southern portions of both 624 and 625. $$ CAZ280>282-284-285-250000- /O.CON.KMFR.FW.W.0011.210624T1900Z-210625T0200Z/ Western Klamath National Forest- Central Siskiyou County Including Shasta Valley-Shasta- Trinity National Forest in Siskiyou County- Siskiyou County from the Cascade Mountains East and South to Mt Shasta-Modoc County Except for the Surprise Valley- 1103 PM PDT Wed Jun 23 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TO 7 PM PDT THURSDAY FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 280...281...282...284 AND 285... * Impacts: Lightning and high fire danger will likely result in new fire starts. Gusty thunderstorm winds could contribute to fire spread. Despite rainfall, initial attack resources could be overwhelmed and holdover fires are possible. * Affected area: In Northern CA...Fire Weather Zones 280...281...282...284 and 285, this includes the the Klamath National Forest, Marble Mountains, Scott Bar Mountains, Shasta National Forest, Modoc National Forest, Lava Beds National Monument and the communities of Happy Camp, Seiad Valley, Etna, Fort Jones, Weed, Mt. Shasta City, Tennant, Canby, Alturas, and Willow Ranch.. * Wind: Gusty, quickly shifting outflow wind gusts up to 40 mph range are possible. * Thunderstorms: Scattered thunderstorms are expected. Isolated dry thunderstorms are also possible, but most are likely to produce at least some rainfall. * Additional Information: Thunderstorms Thursday are expected to move generally from east to west. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD $$ Visit us at www.weather.gov/Medford
957 WWUS86 KMFR 242142 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 242 PM PDT Thu Jun 24 2021 ...Thunderstorms Expected over Northern California Thursday This Afternoon and Evening... .Low pressure centered off of the California coast will edge southward today focusing scattered thunderstorm activity over Northern California. CAZ280>282-284-285-250200- /O.CON.KMFR.FW.W.0011.000000T0000Z-210625T0200Z/ Western Klamath National Forest- Central Siskiyou County Including Shasta Valley-Shasta- Trinity National Forest in Siskiyou County- Siskiyou County from the Cascade Mountains East and South to Mt Shasta-Modoc County Except for the Surprise Valley- 242 PM PDT Thu Jun 24 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM PDT THIS EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 280... 281...282...284 AND 285... * Impacts: Lightning and high fire danger will likely result in new fire starts. Gusty thunderstorm winds could contribute to fire spread. Despite rainfall, initial attack resources could be overwhelmed and holdover fires are possible. * Affected area: In Northern CA...Fire Weather Zones 280...281...282...284 and 285, this includes the the Klamath National Forest, Marble Mountains, Scott Bar Mountains, Shasta National Forest, Modoc National Forest, Lava Beds National Monument and the communities of Happy Camp, Seiad Valley, Etna, Fort Jones, Weed, Mt. Shasta City, Tennant, Canby, Alturas, and Willow Ranch. * Wind: Gusty, quickly shifting outflow wind gusts up to 40 mph range are possible. * Thunderstorms: Scattered thunderstorms are expected. Isolated dry thunderstorms are also possible, but most are likely to produce at least some rainfall. * Additional Information: Thunderstorms are expected to move generally from east to west. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD $$ BTL Visit us at www.weather.gov/Medford
374 WWUS86 KMFR 250155 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 655 PM PDT Thu Jun 24 2021 CAZ280>282-284-285-250300- /O.EXP.KMFR.FW.W.0011.000000T0000Z-210625T0200Z/ Western Klamath National Forest- Central Siskiyou County Including Shasta Valley-Shasta- Trinity National Forest in Siskiyou County- Siskiyou County from the Cascade Mountains East and South to Mt Shasta-Modoc County Except for the Surprise Valley- 655 PM PDT Thu Jun 24 2021 ...RED FLAG WARNING WILL EXPIRE AT 7 PM PDT THIS EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 280...281... 282...284 AND 285... The main thunderstorm threat has subsided. There are a few remaining storms in the area, mainly over the Modoc, that could produce some ground strikes, but these will also be ending in the next hour or two. $$ 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 |
|---|---|---|---|---|
| Jun 23, 3:19 AM PDT | Fire Weather Watch | MFR | Modoc, Siskiyou | 11 hr |
| Jun 23, 2:20 PM PDT | Excessive Heat Warning | MFR | Modoc, Siskiyou | 7 days |
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.