Alert archive / California / Red Flag Warnings in 2021
Red Flag Warning 1, NWS Medford, OR
NWS Medford, OR issued this red flag warning at May 13, 2021, 2:22 PM PDT for Modoc County, Siskiyou County, California; Klamath County, Lake County, Oregon. It took effect at May 14, 2021, 2:00 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
- May 13, 2021, 2:22 PM PDT (21:22 UTC)
- In effect from
- May 14, 2021, 2:00 PM PDT
- Expired
- May 14, 2021, 8:48 PM PDT
- In force
- 7 hr
- Issued by
- NWS Medford, OR
Counties Modoc County, CA, Siskiyou County, CA, Klamath County, OR, Lake County, OR
The radar
The Medford radar (KMAX), 115 km from the middle of the area, began a volume at 21:24 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 123 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
- 1914 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 39 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
216 WWUS86 KMFR 132122 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 222 PM PDT Thu May 13 2021 ...Scattered thunderstorms on unseasonably dry fuels Friday afternoon and evening... .A low pressure system will bring scattered thunderstorms to the areas east of the Cascades and over northern California Friday afternoon and evening. The combination of abundant lightning and fuel conditions that are two to three weeks ahead of normal dryness will make for increased threat of new fire starts. CAZ281-282-284-285-ORZ624-141200- /O.NEW.KMFR.FW.W.0001.210514T2100Z-210515T0600Z/ 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- Klamath Basin and the Fremont-Winema National Forest- 222 PM PDT Thu May 13 2021 ...RED FLAG WARNING IN EFFECT FROM 2 PM TO 11 PM PDT FRIDAY FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 281...282... 284...285 AND 624... The National Weather Service in Medford has issued a Red Flag Warning...which is in effect from 2 PM to 11 PM PDT Friday. * Impacts: Lightning and moderate to 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 Zones...281...282...284...285 which includes most of central and eastern Siskiyou County and the northwest portion of Modoc County. In South Central OR Fire Zone....624 which includes the majority of Klamath County and the western fringes of Lake County. * Wind: Northwest 5 to 10 mph except erratic wind gusts to 40 mph near any thunderstorms. * Thunderstorms: Isolated to scattered. * Rainfall: Storms will produce some rainfall, but wetting rains are not expected. * 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. Scattered thunderstorms combined with dry fuels create conditions where many fire starts may occur in a short period of time. && $$ Visit us at www.weather.gov/Medford
3 follow-up statements
019 WWUS86 KMFR 141135 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 435 AM PDT Fri May 14 2021 ...Scattered thunderstorms on unseasonably dry fuels this afternoon and evening... .A low pressure system will bring scattered thunderstorms to the areas east of the Cascades and over northern California this afternoon and evening. The combination of abundant lightning and fuel conditions that are two to three weeks ahead of normal dryness will make for increased threat of new fire starts. CAZ281-282-284-285-ORZ624-142345- /O.CON.KMFR.FW.W.0001.210514T2100Z-210515T0600Z/ 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- Klamath Basin and the Fremont-Winema National Forest- 435 AM PDT Fri May 14 2021 ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM THIS AFTERNOON TO 11 PM PDT THIS EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 281...282...284...285 AND 624... The National Weather Service in Medford has issued a Red Flag Warning...which is in effect from 2 PM to 11 PM PDT Friday. * 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 Zones...281...282...284...285 which includes most of central and eastern Siskiyou County and the northwest portion of Modoc County. In South Central OR Fire Zone....624 which includes the majority of Klamath County and the western fringes of Lake County. * Wind: Northwest 5 to 10 mph except erratic wind gusts to 40 mph near any thunderstorms. * Thunderstorms: Isolated to scattered. * Rainfall: Storms will produce some rainfall, but wetting rains are not expected. * 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. Scattered thunderstorms combined with dry fuels create conditions where many fire starts may occur in a short period of time. $$ Visit us at www.weather.gov/Medford
086 WWUS86 KMFR 142026 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 126 PM PDT Fri May 14 2021 ...Scattered thunderstorms on unseasonably dry fuels this afternoon and evening... .A low pressure system will bring scattered thunderstorms to areas east of the Cascades and over northern California this afternoon and evening. The combination of abundant lightning and fuel conditions that are two to three weeks ahead of normal dryness will make for increased threat of new fire starts. CAZ281-282-284-285-ORZ624-150600- /O.CON.KMFR.FW.W.0001.210514T2100Z-210515T0600Z/ 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- Klamath Basin and the Fremont-Winema National Forest- 126 PM PDT Fri May 14 2021 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 281... 282...284...285 AND 624... * 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 Zones...281...282...284...285, including most of central and eastern Siskiyou County and the northwest portion of Modoc County. In South Central OR Fire Zone 624, including the majority of Klamath County and the western fringes of Lake County. * Wind: Northwest 5 to 10 mph except erratic wind gusts to 40 mph near any thunderstorms. * Thunderstorms: Isolated to scattered. * Rainfall: Storms will produce some rainfall, but wetting rains are not likely. * View the hazard area in detail at: https://www.wrh.noaa.gov/mfr/HAZARD $$ Visit us at www.weather.gov/Medford
771 WWUS86 KMFR 150348 RFWMFR URGENT - FIRE WEATHER MESSAGE National Weather Service Medford OR 848 PM PDT Fri May 14 2021 CAZ281-282-284-285-ORZ624-150500- /O.CAN.KMFR.FW.W.0001.000000T0000Z-210515T0600Z/ Central Siskiyou County Including Shasta Valley-Shasta- Trinity National Forest in Siskiyou County- Siskiyou County from the Cascade Mountains East and South to Mt Shasta-Modoc County Except for the Surprise Valley- Klamath Basin and the Fremont-Winema National Forest- 848 PM PDT Fri May 14 2021 ...RED FLAG WARNING IS CANCELLED FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE WEATHER ZONES 281...282...284...285 AND 624... The National Weather Service in Medford has cancelled the Red Flag Warning. The chance for thunderstorms has largely subsided. One or two isolated storms will be possible for the western portion of zones 281 and 282 for the next half hour, but these storms are drifting out of these areas quickly. $$ 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 |
|---|---|---|---|---|
| May 13, 2:52 PM PDT | Gale Warning | MFR | 60 hr |
Nearby
Red Flag Warnings in California, 2021Red Flag Warnings in Oregon, 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.