Alert archive / California / Red Flag Warnings in 2021

Red Flag Warning 7, NWS Medford, OR

June 18, 2021Modoc County, California

NWS Medford, OR issued this red flag warning at Jun 18, 2021, 1:58 PM PDT for Modoc County, California. It took effect at Jun 19, 2021, 3:00 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
Jun 18, 2021, 1:58 PM PDT (20:58 UTC)
In effect from
Jun 19, 2021, 3:00 PM PDT
Expired
Jun 19, 2021, 9:00 PM PDT
In force
6 hr
Issued by
NWS Medford, OR

County Modoc County, CA

The nearest sounding before it

Medford/Jackson, OR (KMFR), launched 12:00Z, 9.0 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.

Skew-T log-pSkew-T log-p diagram, Medford/Jackson, OR at 12:00Z on 2021-06-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Medford/Jackson, OR at 12:00Z on 2021-06-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -24 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1853 m above ground
0-6 km bulk shear
23 kt
0-1 km storm-relative helicity
-24 m²/s²
0-3 km storm-relative helicity
78 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

602 
WWUS86 KMFR 182058
RFWMFR

URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
158 PM PDT Fri Jun 18 2021

...Gusty Wind with Low Relative Humidity expected in Modoc County
this and Saturday afternoon and early evening...

CAZ285-192100-
/O.UPG.KMFR.FW.A.0006.210619T2200Z-210620T0400Z/
/O.NEW.KMFR.FW.W.0007.210619T2200Z-210620T0400Z/
/O.CON.KMFR.FW.W.0006.210618T2200Z-210619T0400Z/
Modoc County Except for the Surprise Valley-
158 PM PDT Fri Jun 18 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING
FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE
285...
...RED FLAG WARNING IN EFFECT FROM 3 PM TO 9 PM PDT SATURDAY 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 9 PM PDT Saturday. The
Fire Weather Watch is no longer in effect.

* Impacts:  Strong, gusty wind with low relative humidity and high
fire danger will likely contribute to a significant spread of new
and existing fires.

* Affected area: 
  In Northern CA...Fire Weather Zone 285.

* Wind: West to northwest 10 to 15 mph with gusts of 25 to 30 mph
  today and gusts of 20 to 25 Saturday.

* Humidity: 7 to 10 percent.

* View the hazard area in detail at:
https://www.wrh.noaa.gov/mfr/HAZARD

* 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
3 follow-up statements
885 
WWUS86 KMFR 190408
RFWMFR

URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
908 PM PDT Fri Jun 18 2021

...Gusty Wind with Low Relative Humidity expected in Modoc County
   Saturday afternoon and early evening...

CAZ285-192200-
/O.EXP.KMFR.FW.W.0006.000000T0000Z-210619T0400Z/
/O.CON.KMFR.FW.W.0007.210619T2200Z-210620T0400Z/
Modoc County Except for the Surprise Valley-
908 PM PDT Fri Jun 18 2021

...RED FLAG WARNING REMAINS IN EFFECT FROM 3 PM TO 9 PM PDT
   SATURDAY FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR FIRE 
   WEATHER ZONE 285...
...RED FLAG WARNING HAS EXPIRED FOR STRONG GUSTY WINDS AND LOW
   HUMIDITY FOR FIRE WEATHER ZONE 285...

* Impacts:  Strong, gusty wind with low relative humidity and high
  fire danger will likely contribute to a significant spread of new
  and existing fires.

* Affected area: 
  In Northern CA...Fire Weather Zone 285.

* Wind: Northwest 10 to 15 mph with gusts up to 25 mph.

* Humidity: 7 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.

&&

$$

Visit us at www.weather.gov/Medford
580 
WWUS86 KMFR 192051
RFWMFR

URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
151 PM PDT Sat Jun 19 2021

CAZ285-200400-
/O.CON.KMFR.FW.W.0007.210619T2200Z-210620T0400Z/
Modoc County Except for the Surprise Valley-
151 PM PDT Sat Jun 19 2021

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM PDT THIS EVENING
FOR STRONG GUSTY WINDS AND LOW HUMIDITY FOR FIRE WEATHER ZONE 
285...

* Impacts: Strong, gusty wind with low relative humidity and high
  fire danger will likely contribute to a significant spread of new
  and existing fires.

* Affected area: 
  In Northern CA...Fire Weather Zone 285.

* Wind: Northwest 10 to 15 mph with gusts up to 25 mph.

* Humidity: 7 to 10 percent.

* View the hazard area in detail at:
https://www.wrh.noaa.gov/mfr/HAZARD

$$

ORZ624-625-200900-
/O.NEW.KMFR.FW.A.0007.210622T0000Z-210622T0600Z/
Klamath Basin and the Fremont-Winema National Forest-
South Central Oregon Desert including the BLM Land in Eastern Lake
and Western Harney Counties-
151 PM PDT Sat Jun 19 2021

...FIRE WEATHER WATCH IN EFFECT FROM MONDAY AFTERNOON THROUGH
MONDAY EVENING FOR ABUNDANT LIGHTNING ON DRY FUELS FOR FIRE
WEATHER ZONES 624 AND 625...

The National Weather Service in Medford has issued a Fire Weather
Watch...which is in effect from Monday afternoon through Monday
evening.

* 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 
  portions of the Fremont Winema National Forest, and the 
  communities of Chemult, Fort Rock, Silver Lake, Sprague River, 
  Chiloquin, Bly, and Bonanza.

* Wind: Gusty and variable near thunderstorms.

* Thunderstorms: Will start initially dry, becoming more wet
  heading into night. Isolated thunderstorms are expected to
  continue into Tuesday morning.

* 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
432 
WWUS86 KMFR 200401
RFWMFR

URGENT - FIRE WEATHER MESSAGE
National Weather Service Medford OR
901 PM PDT Sat Jun 19 2021

CAZ285-200515-
/O.EXP.KMFR.FW.W.0007.000000T0000Z-210620T0400Z/
Modoc County Except for the Surprise Valley-
901 PM PDT Sat Jun 19 2021

...RED FLAG WARNING HAS EXPIRED FOR STRONG GUSTY WIND WITH LOW RH
   FOR FIRE WEATHER ZONE 285...

Winds are diminishing and humidities are rising across the area. 

$$

ORZ624-625-202200-
/O.CON.KMFR.FW.A.0007.210622T0000Z-210622T0600Z/
Klamath Basin and the Fremont-Winema National Forest-
South Central Oregon Desert including the BLM Land in Eastern Lake
and Western Harney Counties-
901 PM PDT Sat Jun 19 2021

...FIRE WEATHER WATCH REMAINS IN EFFECT FROM MONDAY AFTERNOON
   THROUGH MONDAY EVENING FOR STRONG GUSTY WIND WITH LOW RH FOR 
   FIRE WEATHER ZONES 624 AND 625...

* Impacts: Strong, gusty wind with low relative humidity and high fire
  danger will likely contribute to a significant spread of new and
  existing fires.

* Affected area: 
  In South Central OR...Fire Weather Zones 624 and 625.

* Wind: Southwest 10 to 15 mph with gusts up to 25 mph.

* Thunderstorms: Will start initially dry, becoming more wet
  heading into the night. Isolated thunderstorms are expected to
  continue into Tuesday morning.

* View the hazard area in detail at:
  https://www.wrh.noaa.gov/mfr/HAZARD

$$


Visit us at www.weather.gov/Medford

The office that day

Everything else NWS Medford, OR issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 18, 1:37 PM PDTExcessive Heat WarningMFRSiskiyou3 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.