Red Flag Warning 1, NWS Eureka, CA

147 
WWUS86 KEKA 300621
RFWEKA

Urgent - Fire Weather Message
National Weather Service Eureka CA
Issued by National Weather Service Medford OR
1121 PM PDT Sun Jun 29 2025

...SCATTERED DRY LIGHTNING IS LIKELY MONDAY AND TUESDAY AFTERNOON
ACROSS THE INTERIOR MOUNTAINS...

.A pulse of moisture moving up the Central Valley combined with
very hot and dry surface conditions and moderate easterly winds
will combine to create scattered dry thunderstorms over the
interior mountains. Any storms that do form will likely produce 
wetting rain in the cores but lightning is possible far from these
cores in areas that will remain dry. Stroms Monday are most likely
over Northern Trinity and Interior Humboldt with moderate movement
towards the coast. Stroms Tuesday will be more stationary and are
most likely to form over southern Trinity and Northern Mendocino
Counties. 

CAZ204-211-212-277-283-302200-
/O.CON.KEKA.FW.W.0001.250630T1800Z-250701T0600Z/
/O.CON.KEKA.FW.A.0002.250701T1800Z-250702T0600Z/
Lower Middle Klamath-Hoopa-Van Duzen/Mad River-
W Mendocino NF/E Mendocino Unit-Trinity-
1121 PM PDT Sun Jun 29 2025

...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 11 PM PDT
MONDAY...
...FIRE WEATHER WATCH REMAINS IN EFFECT FROM TUESDAY MORNING
THROUGH TUESDAY EVENING...

* THUNDERSTORMS...Scattered dry thunderstorms are likely (25%
  chance) Monday Tuesday afternoons. There is a slight chance of
  isolated thundersotrms overnight Monday into Tuesday.

* OUTFLOW WINDS...Gusty and erratic outflow winds are possible 
  up to 50 mph.

* IMPACTS...any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

A Fire Weather Watch means that critical fire weather conditions
are forecast to occur. Listen for later forecasts and possible
Red Flag Warnings.

&&

$$


http://weather.gov/eureka

130 
WWUS86 KEKA 301830
RFWEKA

Urgent - Fire Weather Message
National Weather Service Eureka CA
1130 AM PDT Mon Jun 30 2025

...SCATTERED DRY LIGHTNING IS LIKELY MONDAY AND TUESDAY AFTERNOON
ACROSS THE INTERIOR MOUNTAINS...

.A pulse of moisture moving up the Central Valley combined with
very hot and dry surface conditions and moderate easterly winds
will combine to create scattered dry thunderstorms over the
interior mountains. Any storms that do form will likely produce
wetting rain in the cores but lightning is possible far from
these cores in areas that will remain dry. Storms Monday are most
likely over Northern Trinity and Interior Humboldt with moderate 
movement towards the coast. Storms Tuesday will be more 
stationary and are most likely to form over Trinity, Northern 
Mendocino and possibly Del Norte.

CAZ204-211-212-277-283-010230-
/O.UPG.KEKA.FW.A.0002.250701T1800Z-250702T0600Z/
/O.NEW.KEKA.FW.W.0002.250701T1800Z-250702T0600Z/
/O.CON.KEKA.FW.W.0001.000000T0000Z-250701T0600Z/
Lower Middle Klamath-Hoopa-Van Duzen/Mad River-
W Mendocino NF/E Mendocino Unit-Trinity-
1130 AM PDT Mon Jun 30 2025

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING...
...RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM PDT TUESDAY...

The National Weather Service in Eureka has issued a Red Flag
Warning, which is in effect from 11 AM to 11 PM PDT Tuesday. The
Fire Weather Watch is no longer in effect. 

* OUTFLOW WINDS...Gusty and erratic outflow winds are possible 
  up to 50 mph. 

* IMPACTS...any fires that develop will likely spread rapidly.
  Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

&&

$$

CAZ203-010230-
/O.NEW.KEKA.FW.W.0002.250701T1800Z-250702T0600Z/
Upper Smith-
1130 AM PDT Mon Jun 30 2025

...RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM PDT TUESDAY...

The National Weather Service in Eureka has issued a Red Flag
Warning, which is in effect from 11 AM to 11 PM PDT Tuesday. 

* AFFECTED AREA...Fire weather zone 203.

* OUTFLOW WINDS...Gusty and erratic outflow winds are possible 
  up to 50 mph. 

* IMPACTS...any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

&&

$$


http://weather.gov/eureka

345 
WWUS86 KEKA 010228
RFWEKA

Urgent - Fire Weather Message
National Weather Service Eureka CA
728 PM PDT Mon Jun 30 2025

...SCATTERED DRY LIGHTNING IS LIKELY MONDAY AND TUESDAY AFTERNOON
ACROSS THE INTERIOR MOUNTAINS...

.A pulse of moisture moving up the Central Valley combined with
very hot and dry surface conditions and moderate easterly winds
will combined to form scattered, mostly dry thunderstorms over 
Trinity, Humboldt, and Del Norte counties Monday. Some isolated 
nocturnal redevelop is possible tonight. Scattered thunderstorms 
will redevelop Tuesday. These storms will be slower moving to 
stationary and are most likely to form over Trinity, Northern 
Mendocino and possibly Del Norte. Storms may also originate in 
northern Lake County. 

CAZ204-211-212-277-283-011200-
/O.CON.KEKA.FW.W.0001.000000T0000Z-250701T0600Z/
/O.CON.KEKA.FW.W.0002.250701T1800Z-250702T0600Z/
Lower Middle Klamath-Hoopa-Van Duzen/Mad River-
W Mendocino NF/E Mendocino Unit-Trinity-
728 PM PDT Mon Jun 30 2025

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS
EVENING...
...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 11 PM PDT
TUESDAY...

* OUTFLOW WINDS...Gusty and erratic outflow winds are possible 
  up to 50 mph. 

* IMPACTS...any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

&&

$$

CAZ203-011200-
/O.CON.KEKA.FW.W.0002.250701T1800Z-250702T0600Z/
Upper Smith-
728 PM PDT Mon Jun 30 2025

...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 11 PM PDT
TUESDAY...

* AFFECTED AREA...Fire weather zone 203.

* OUTFLOW WINDS...Gusty and erratic outflow winds are possible 
  up to 50 mph.

* IMPACTS...any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

&&

$$


http://weather.gov/eureka

907 
WWUS86 KEKA 010620
RFWEKA

Urgent - Fire Weather Message
National Weather Service Eureka CA
1120 PM PDT Mon Jun 30 2025

...SCATTERED DRY LIGHTNING IS LIKELY TUESDAY AFTERNOON ACROSS THE
INTERIOR MOUNTAINS...

.A pulse of moisture moving up the Central Valley combined with
very hot and dry surface conditions helped produce scattered dry 
lightning Monday. Scattered thunderstorms will redevelop Tuesday 
afternoon. These storms will be slower moving to stationary and 
are most likely to form over Trinity, Northern Mendocino and 
possibly Del Norte. Storms may also originate in northern Lake 
County.

CAZ204-211-212-277-283-011430-
/O.EXP.KEKA.FW.W.0001.000000T0000Z-250701T0600Z/
/O.CON.KEKA.FW.W.0002.250701T1800Z-250702T0600Z/
Lower Middle Klamath-Hoopa-Van Duzen/Mad River-
W Mendocino NF/E Mendocino Unit-Trinity-
1120 PM PDT Mon Jun 30 2025

...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 11 PM PDT
TUESDAY...

* THUNDERSTORMS...Scattered dry thunderstorms are likely in the
  afternoon mostly over high terrain. 

* AFFECTED AREA...Fire weather zones 204, 211, 212, 277, and 283. 

* OUTFLOW WINDS...Gusty and erratic outflow winds are possible 
  up to 50 mph. 

* IMPACTS...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

&&

$$

CAZ203-011430-
/O.CON.KEKA.FW.W.0002.250701T1800Z-250702T0600Z/
Upper Smith-
1120 PM PDT Mon Jun 30 2025

...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 11 PM PDT
TUESDAY...

* THUNDERSTORMS...Scattered dry thunderstorms are likely in the
  afternoon mostly over high terrain.

* AFFECTED AREA...Fire weather zone 203.

* OUTFLOW WINDS...Gusty and erratic outflow winds are possible 
  up to 50 mph.

* IMPACTS...Any fires that develop will likely spread rapidly. 
  Outdoor burning is not recommended.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Red Flag Warning means that critical fire weather conditions
are either occurring now, or will shortly. A combination of
strong winds, low relative humidity, and warm temperatures can
contribute to extreme fire behavior.

&&

$$


http://weather.gov/eureka

AREA FORECAST DISCUSSION
National Weather Service Eureka CA
Issued by National Weather Service Medford OR
520 AM PDT Sun Jun 29 2025

.SYNOPSIS...Hot and dry weather will peak Sunday with highs near 100
for the interior. Warm and Sunny weather will even approach the
coast by Sunday. There is a chance for scattered thunderstorms over
the interior Monday and Tuesday.

&&

.DISCUSSION...Heat draped across the interior Saturday
with highs just barely reaching 100 in the hottest valleys. High
pressure will peak Sunday. Highs will most likely peak right around
100 along the Trinity and Russian River Valleys with highs in excess
of 90 reaching as close to the coast as Myers Flat in Humboldt and
Boonville in Mendocino. The confidence in highs of at least 100 is
high (70 to 90%) but there is very little chance of any highs over
105 (10 to 30%). Cooling will remain good overnight with lows in the
60s. This will help keep general HeatRisk only moderate with
isolated high HeatRisk in Trinity County. High pressure and easterly
flow will both help shallow and weaken the marine layer this
weekend. Should clouds clear out fast enough, highs on the coast
will likely crest in the low 70s this weekend (50% chance from NBM).

High pressure will gradually break Monday and Tuesday as low
pressure skirts just south of the area into the Central California
Coast. Breaking high pressure will help to decrease highs back into
the 90s and pull more marine influence back along the coast, though
offshore wind will most likely keep marine influence shallow and
sporadic Monday and Tuesday. Global ensembles show a strong and
consistent signal that the low will also help enhance midlevel
instability with CAPE of 500 to 1000 J/Kg. Moisture pulling up the
Sacramento Valley and then pushing up over the coastal mountains
will provide the final ingredient for thunderstorms. There is much
higher confidence (30% chance) of isolated to scattered
thunderstorms over the interior Monday and Tuesday afternoons,
mostly concentrated over high terrain during the peak heat of the
afternoon. Theses storms could approach the coast with the RRFS
showing returns as near Kneeland. Though Precipitable Water is
modeled between 0.6 and 1.0 inches, dry air at the surface and
moderate steering flow (10 to 20 Kts from the SE) will generally
reduce rainfall at any given point. CAMs indicate the highest risk
Monday will be in Trinity County with storms extending west to around
Hoopa and along the Klamath Basin. This is an increasing signal (15%
chance) of thunderstorms near Southfork ridge early Sunday
morning with robust convection then over Trinity and the Yolla
Bollys Sunday afternoon. There does remain some uncertainty as
small shifts in the low pressure could greatly influence the
strength and location of storms. Beyond storms, there is high
confidence that the general pattern will remain warm, dry, and
benign. /JHW

&&

.AVIATION...12Z TAFs...A shallow marine layer looms over the coast
into the early morning hours of Sunday. Winds at coastal
terminals are forecast to be light with periods of southerly flow
right along the coast. Through the day, mostly westerly to
northwesterly winds are expected for coastal terminals. The
shallow marine layer this morning is creating IFR ceilings around
Humboldt Bay with mostly MVFR to occasional IFR conditions along
the Del Norte Coast. Lifting of ceilings and general clearing is
forecast as winds pick back up late this morning into the
afternoon. Another shallow marine layer is expected along the
North Coast very late tonight and into very early Monday morning.
VFR conditions are expected at UKI and most interior areas. /JLW

&&

.MARINE...Gale force northerly winds are forecast across the
northern outer waters through Sunday morning, followed by large
and steep waves Sunday afternoon. Strong winds over the outer
waters will create steep waves for the southern inner waters
through Sunday morning, while steep seas will prevail in the
northern inner waters. Potential for gale force northerly winds
and large steep waves are forecast to increase early to mid next
week.

&&

.FIRE WEATHER...Hot and dry conditions will peak Sunday with highs
near 100 and minimum RH in the mid teens. RH recovery has slightly
worsened to near 70% in valleys early Sunday and likely again early
Monday. Thankfully, winds are mostly diurnal and terrain driven with
only short lived gusty conditions each afternoon.

Low pressure skirting the area will help slightly ease temperature
and RH Monday and Tuesday but will also bring a chance of scattered,
mostly dry, thunderstorms. There is a very weak indication of
isolated storms forming overnight early Monday morning (10%), most
likely over the interior and then moving east towards the coast in
Trinity and Humboldt Counties. There is a much stronger signal of
thunderstorms forming over high terrain during the afternoon on
Monday and Tuesday (30% chance). The greatest chance of storms Monday
will be for the northern half of the area over northern Trinity and
Humboldt Counties. Any storms have the potential to drop between 0.6
and 1.0 inch of rain in there cores, but moderate storm movement (10
to 20 kts from the SE) and dry air at the surface will still likely
provide ample opportunity for lightning to strike dry fuels. The
newest convective models show a notable signal for isolate
thunderstorms over southern Humboldt COunty early Tuesday morning
and then robust convection over Trinity County and the Yolla Bollys
Tuesday afternoon. With the signal for convection is consistent,
exact location remains variable and uncertain s small changes in
the path of low pressure can have large impacts. /JHW

&&

.EKA WATCHES/WARNINGS/ADVISORIES...
CA...
     Fire Weather Watch from Monday morning through Monday
     evening for CAZ204-211-212-277-283.

NORTHWEST CALIFORNIA COASTAL WATERS...
     Small Craft Advisory until 11 PM PDT Monday for PZZ450-475.

     Small Craft Advisory until 11 AM PDT this morning for
     PZZ455.

     Gale Warning until 11 AM PDT this morning for PZZ470.

     Hazardous Seas Warning from 11 AM this morning to 11 AM PDT
     Monday for PZZ470.

&&

NOTE: The full forecast discussion is now regularly issued between
10 am/pm and 1 pm/am. Additional updates will be issued as needed.

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For forecast zone information
see the forecast zone map online:
https://www.weather.gov/images/eka/zonemap.png