SPC Day 3-8 Fire Weather Outlook
Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0248 PM CST Sun Dec 14 2025
Valid 161200Z - 221200Z
Confidence in the potential for critical fire weather conditions
remains limited for the country through the extended period.
Long-range guidance and cluster analyses continue to trend towards a
more active upper-level flow regime heading into the upcoming work
week. This pattern shift will favor surface cyclone development
across Plains/Midwest with most guidance showing a reasonably strong
signal for intense cyclone development across the northern
Plains/Great Lakes during the D4/Wed to D5/Thur period. A similar
signal for cyclone development is noted heading into the upcoming
weekend (albeit with considerably higher model/ensemble
variability). In general, this synoptic regime will promote
rain/snow chances from the Pacific Northwest and northern Rockies
into the Midwest and southeastern states with predominantly dry and
warm conditions expected for the Southwest and southern Plains.
...D5/Thursday - D7/Saturday - Central/Southern High Plains...
A return to warm and dry conditions is anticipated for the work week
with temperatures expected to climb into the mid/upper 60s for
portions of the southern High Plains by mid-week. These temperatures
will reside near the 90th percentile of seasonal normal for the
region, and will promote steady dead/dormant fuel drying through
late week. The development of a series of strong surface lows and
cold frontal passages beginning D4/Wed and lasting through the
weekend may support strong enough winds for periods of elevated to
critical fire weather conditions across portions of the central and
southern High Plains each afternoon. While most deterministic and
ensemble solutions generally agree in the overall pattern,
considerable variability persist among guidance. This limits
confidence in which day/regions will see the greatest fire weather
threat, though risk probabilities may eventually be needed as model
consensus improves in the coming days.
..Moore.. 12/14/2025
...Please see www.spc.noaa.gov/fire for graphic product...
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SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0142 PM CST Sun Dec 14 2025
Valid 142000Z - 151200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not expected today or tonight.
...20z Update...
The 10 percent thunder area was removed from South TX as the surface
front has surged south of the area into northeast Mexico. A minor
southward adjustment was also made across South Florida based on
latest surface observations and radar trends. Isolated weak
thunderstorms may persist the remainder of the afternoon from South
FL into the Keys.
..Leitman.. 12/14/2025
.PREV DISCUSSION... /ISSUED 0954 AM CST Sun Dec 14 2025/
Dry and stable conditions will prevail over most of the CONUS today,
with a few small exceptions. A strong cold front sagging southward
across TX might result in isolated afternoon thunderstorms over
south TX. Widely scattered showers and thunderstorms could affect
south FL this afternoon as the same front weakens and approaches the
area. And finally, a few lightning strikes could occur inland
across western WA late tonight as a strong shortwave trough
approaches. No severe storms are anticipated in any of these areas.
Read more
SPC 2000Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0142 PM CST Sun Dec 14 2025
Valid 142000Z - 151200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not expected today or tonight.
...20z Update...
The 10 percent thunder area was removed from South TX as the surface
front has surged south of the area into northeast Mexico. A minor
southward adjustment was also made across South Florida based on
latest surface observations and radar trends. Isolated weak
thunderstorms may persist the remainder of the afternoon from South
FL into the Keys.
..Leitman.. 12/14/2025
.PREV DISCUSSION... /ISSUED 0954 AM CST Sun Dec 14 2025/
Dry and stable conditions will prevail over most of the CONUS today,
with a few small exceptions. A strong cold front sagging southward
across TX might result in isolated afternoon thunderstorms over
south TX. Widely scattered showers and thunderstorms could affect
south FL this afternoon as the same front weakens and approaches the
area. And finally, a few lightning strikes could occur inland
across western WA late tonight as a strong shortwave trough
approaches. No severe storms are anticipated in any of these areas.
Read more
SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0107 PM CST Sun Dec 14 2025
Valid 161200Z - 171200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
A few lightning flashes may occur over parts of the Pacific
Northwest on Tuesday/Tuesday evening, with isolated thunderstorms
also possible over the Texas Coast Plain early Wednesday morning.
...Synopsis...
A series of mid-level troughs will progress across the northern
CONUS on Tuesday, resulting in pronounced surface troughs becoming
established across the Pacific Northwest and the central CONUS.
Cooler temperatures aloft will overspread the northern OR and WA
coastline, resulting in scant buoyancy amid deep-layer ascent to
support a few lightning flashes during the day Tuesday. A warm-air
advection regime should develop along the western Gulf Coast in
response to the glancing mid-level trough to the north, resulting in
the onset of moisture return. Elevated buoyancy should develop
within the warm-air advection regime after 06Z Wednesday morning,
which may support isolated thunderstorm development across the TX
Coastal Plain.
..Squitieri.. 12/14/2025
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SPC 1930Z Day 3 Outlook
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0107 PM CST Sun Dec 14 2025
Valid 161200Z - 171200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
A few lightning flashes may occur over parts of the Pacific
Northwest on Tuesday/Tuesday evening, with isolated thunderstorms
also possible over the Texas Coast Plain early Wednesday morning.
...Synopsis...
A series of mid-level troughs will progress across the northern
CONUS on Tuesday, resulting in pronounced surface troughs becoming
established across the Pacific Northwest and the central CONUS.
Cooler temperatures aloft will overspread the northern OR and WA
coastline, resulting in scant buoyancy amid deep-layer ascent to
support a few lightning flashes during the day Tuesday. A warm-air
advection regime should develop along the western Gulf Coast in
response to the glancing mid-level trough to the north, resulting in
the onset of moisture return. Elevated buoyancy should develop
within the warm-air advection regime after 06Z Wednesday morning,
which may support isolated thunderstorm development across the TX
Coastal Plain.
..Squitieri.. 12/14/2025
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SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1248 PM CST Sun Dec 14 2025
Valid 151200Z - 161200Z
...NO CRITICAL AREAS...
The previous forecast remains on track with no changes required.
Localized fire weather concerns remain possible within in the
immediate lee of the Laramie Mountains in southeast WY as well as
the northern Front Range in northern CO; however, latest guidance
continues to suggest that the overall potential will remain
sufficiently localized and transient to preclude highlights.
..Moore.. 12/14/2025
.PREV DISCUSSION... /ISSUED 1142 PM CST Sat Dec 13 2025/
...Synopsis...
An upper ridge will continue shift eastward into more of the central
CONUS on Monday. Surface high pressure will remain in the Southeast.
Breezy return flow will occur across parts of the southern Plains,
but cooler temperatures should continue to limit RH reductions.
Locally dry and breezy conditions are again possible in southeast
Wyoming. Fuels in parts of these regions may support brief, locally
elevated conditions, but greater fire weather concerns are not
expected.
...Please see www.spc.noaa.gov/fire for graphic product...
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SPC Day 2 Fire Weather Outlook
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1248 PM CST Sun Dec 14 2025
Valid 151200Z - 161200Z
...NO CRITICAL AREAS...
The previous forecast remains on track with no changes required.
Localized fire weather concerns remain possible within in the
immediate lee of the Laramie Mountains in southeast WY as well as
the northern Front Range in northern CO; however, latest guidance
continues to suggest that the overall potential will remain
sufficiently localized and transient to preclude highlights.
..Moore.. 12/14/2025
.PREV DISCUSSION... /ISSUED 1142 PM CST Sat Dec 13 2025/
...Synopsis...
An upper ridge will continue shift eastward into more of the central
CONUS on Monday. Surface high pressure will remain in the Southeast.
Breezy return flow will occur across parts of the southern Plains,
but cooler temperatures should continue to limit RH reductions.
Locally dry and breezy conditions are again possible in southeast
Wyoming. Fuels in parts of these regions may support brief, locally
elevated conditions, but greater fire weather concerns are not
expected.
...Please see www.spc.noaa.gov/fire for graphic product...
Read more
SPC 1730Z Day 2 Outlook
Day 2 Convective Outlook
NWS Storm Prediction Center Norman OK
1105 AM CST Sun Dec 14 2025
Valid 151200Z - 161200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
A few lightning flashes may occur in western Oregon and Washington
tomorrow (Monday).
...Synopsis...
A broad but low-amplitude upper ridge will become established east
of the Rockies while a de-amplifying upper trough overspreads the
northwestern U.S. tomorrow (Monday). Surface high pressure/colder
air will prevail east of the MS River, while dry, statically stable
air becomes predominant across the Plains into portions of the
Interior West. Thunderstorm potential will therefore be limited
across most of the U.S. One exception will be portions of the
Pacific Northwest, where colder temperatures aloft will accompany
the aforementioned de-amplifying upper trough. This will yield scant
buoyancy, amid appreciable forcing for ascent, to support a few
lightning flashes wherever deep-moist convection can develop.
Furthermore, 50+ kt flow, within a few hundred m above ground level,
will develop with the passage of the upper trough. If a stronger
storm core can materialize, enough downward momentum transport may
take place to support a few damaging gusts. However, confidence in
this scenario is too low for the introduction of severe
probabilities at this time.
..Squitieri.. 12/14/2025
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SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1008 AM CST Sun Dec 14 2025
Valid 141700Z - 151200Z
...NO CRITICAL AREAS...
Fire weather concerns remain limited for today across the country.
Dry and breezy conditions are beginning to emerge across portions of
the Southeast in the wake of an early-morning frontal passage, but
recent rainfall over the past 24 hours should mitigate fuel status
for most locations. Localized elevated conditions may emerge within
the immediate eastern slopes of the Laramie Mountains in southeast
WY, but modest fuel status and weak winds away from the terrain
limit the overall fire weather potential. See the previous
discussion for additional details.
..Moore.. 12/14/2025
.PREV DISCUSSION... /ISSUED 1141 PM CST Sat Dec 13 2025/
...Synopsis...
An upper-level trough will move through the Mid-Atlantic/Northeast
today and eventually move off the East Coast by Monday morning. Cold
air will continue to filter into the Southeast. Some dry and breezy
conditions are possible in southeastern Wyoming. Additionally gusty
northerly winds with modest RH reductions are expected in the
Southeast behind the cold front. Given the cool/cold temperatures
and poor fuel receptiveness across much of the CONUS, fire weather
concerns will remain low.
...Please see www.spc.noaa.gov/fire for graphic product...
Read more
SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1008 AM CST Sun Dec 14 2025
Valid 141700Z - 151200Z
...NO CRITICAL AREAS...
Fire weather concerns remain limited for today across the country.
Dry and breezy conditions are beginning to emerge across portions of
the Southeast in the wake of an early-morning frontal passage, but
recent rainfall over the past 24 hours should mitigate fuel status
for most locations. Localized elevated conditions may emerge within
the immediate eastern slopes of the Laramie Mountains in southeast
WY, but modest fuel status and weak winds away from the terrain
limit the overall fire weather potential. See the previous
discussion for additional details.
..Moore.. 12/14/2025
.PREV DISCUSSION... /ISSUED 1141 PM CST Sat Dec 13 2025/
...Synopsis...
An upper-level trough will move through the Mid-Atlantic/Northeast
today and eventually move off the East Coast by Monday morning. Cold
air will continue to filter into the Southeast. Some dry and breezy
conditions are possible in southeastern Wyoming. Additionally gusty
northerly winds with modest RH reductions are expected in the
Southeast behind the cold front. Given the cool/cold temperatures
and poor fuel receptiveness across much of the CONUS, fire weather
concerns will remain low.
...Please see www.spc.noaa.gov/fire for graphic product...
Read more
SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0954 AM CST Sun Dec 14 2025
Valid 141630Z - 151200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not expected today or tonight.
Dry and stable conditions will prevail over most of the CONUS today,
with a few small exceptions. A strong cold front sagging southward
across TX might result in isolated afternoon thunderstorms over
south TX. Widely scattered showers and thunderstorms could affect
south FL this afternoon as the same front weakens and approaches the
area. And finally, a few lightning strikes could occur inland
across western WA late tonight as a strong shortwave trough
approaches. No severe storms are anticipated in any of these areas.
..Hart/Weinman.. 12/14/2025
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SPC 1630Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0954 AM CST Sun Dec 14 2025
Valid 141630Z - 151200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not expected today or tonight.
Dry and stable conditions will prevail over most of the CONUS today,
with a few small exceptions. A strong cold front sagging southward
across TX might result in isolated afternoon thunderstorms over
south TX. Widely scattered showers and thunderstorms could affect
south FL this afternoon as the same front weakens and approaches the
area. And finally, a few lightning strikes could occur inland
across western WA late tonight as a strong shortwave trough
approaches. No severe storms are anticipated in any of these areas.
..Hart/Weinman.. 12/14/2025
Read more
SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0652 AM CST Sun Dec 14 2025
Valid 141300Z - 151200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not expected today or tonight.
...Discussion...
A prominent upper trough will continue to spread southeastward from
the Midwest/Great Lakes toward the Mid-Atlantic/Northeast coast by
tonight. Surface high pressure and related cold/dry continental
trajectories will be increasingly prevalent east of the Rockies.
Near a south/southeastward-advancing cold front, isolated
thunderstorms will remain possible early today over the northwest
Gulf, while a few flashes of lighting are also possible with weak
convection across the southern Florida Peninsula, before flow veers
and stronger convergence shifts offshore. Lastly, a few lightning
flashes could also occur late tonight near coastal Washington within
the warm/moist conveyor preceding an approaching shortwave trough
and cold front.
..Guyer/Lyons.. 12/14/2025
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SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0652 AM CST Sun Dec 14 2025
Valid 141300Z - 151200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not expected today or tonight.
...Discussion...
A prominent upper trough will continue to spread southeastward from
the Midwest/Great Lakes toward the Mid-Atlantic/Northeast coast by
tonight. Surface high pressure and related cold/dry continental
trajectories will be increasingly prevalent east of the Rockies.
Near a south/southeastward-advancing cold front, isolated
thunderstorms will remain possible early today over the northwest
Gulf, while a few flashes of lighting are also possible with weak
convection across the southern Florida Peninsula, before flow veers
and stronger convergence shifts offshore. Lastly, a few lightning
flashes could also occur late tonight near coastal Washington within
the warm/moist conveyor preceding an approaching shortwave trough
and cold front.
..Guyer/Lyons.. 12/14/2025
Read more
SPC 1300Z Day 1 Outlook
Day 1 Convective Outlook
NWS Storm Prediction Center Norman OK
0652 AM CST Sun Dec 14 2025
Valid 141300Z - 151200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
Severe thunderstorms are not expected today or tonight.
...Discussion...
A prominent upper trough will continue to spread southeastward from
the Midwest/Great Lakes toward the Mid-Atlantic/Northeast coast by
tonight. Surface high pressure and related cold/dry continental
trajectories will be increasingly prevalent east of the Rockies.
Near a south/southeastward-advancing cold front, isolated
thunderstorms will remain possible early today over the northwest
Gulf, while a few flashes of lighting are also possible with weak
convection across the southern Florida Peninsula, before flow veers
and stronger convergence shifts offshore. Lastly, a few lightning
flashes could also occur late tonight near coastal Washington within
the warm/moist conveyor preceding an approaching shortwave trough
and cold front.
..Guyer/Lyons.. 12/14/2025
Read more
Day 4-8 Outlook
Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0356 AM CST Sun Dec 14 2025
Valid 171200Z - 221200Z
...DISCUSSION...
Northward moisture return is expected to persist through the period
on D4/Wednesday as a strong surface low moves across the northern
Plains and Upper Midwest and strong southerly flow expands across
much of the warm sector. Despite the moisture advancing well inland,
warm air aloft should limit strong thunderstorm potential on
D4/Wednesday.
By D5/Thursday, weak to moderate instability is expected from East
Texas to the Mid-Mississippi Valley. Strong shear will be present
north of I-20 as a mid-level trough amplifies and a strong mid-level
jet overspreads the warm sector. Despite the presence of strong
shear and weak to moderate instability, updraft intensity may still
struggle due to weak lapse rates/warm air aloft. Only weak height
falls/cooling temperatures aloft are forecast south of the MO
Bootheel. Thunderstorms are likely from the Mid-Mississippi Valley
northward, where forcing will be stronger, but these regions will
remain well north of the more favorable instability. Therefore, any
severe weather threat would likely be marginal.
The cold front, associated with the storm system on D5/Thursday,
will move off the East Coast early on D6/Friday. Some marginal
severe weather may be possible Friday morning, but otherwise, severe
weather potential will be low as high pressure builds east of the MS
River in its wake.
By this weekend, return flow is anticipated across portions of the
southern Plains, but destabilization remains uncertain. A zonal
mid-level pattern with multiple embedded shortwave troughs is
currently forecast during that timeframe which commonly results in
considerably low predictability. Regardless of the exact outcome
over the weekend, there is general consensus for zonal flow and a
ridge building across the western CONUS and into the Plains. In
general, this will likely not support a significant severe weather
threat.
Read more
Day 4-8 Outlook
Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0356 AM CST Sun Dec 14 2025
Valid 171200Z - 221200Z
...DISCUSSION...
Northward moisture return is expected to persist through the period
on D4/Wednesday as a strong surface low moves across the northern
Plains and Upper Midwest and strong southerly flow expands across
much of the warm sector. Despite the moisture advancing well inland,
warm air aloft should limit strong thunderstorm potential on
D4/Wednesday.
By D5/Thursday, weak to moderate instability is expected from East
Texas to the Mid-Mississippi Valley. Strong shear will be present
north of I-20 as a mid-level trough amplifies and a strong mid-level
jet overspreads the warm sector. Despite the presence of strong
shear and weak to moderate instability, updraft intensity may still
struggle due to weak lapse rates/warm air aloft. Only weak height
falls/cooling temperatures aloft are forecast south of the MO
Bootheel. Thunderstorms are likely from the Mid-Mississippi Valley
northward, where forcing will be stronger, but these regions will
remain well north of the more favorable instability. Therefore, any
severe weather threat would likely be marginal.
The cold front, associated with the storm system on D5/Thursday,
will move off the East Coast early on D6/Friday. Some marginal
severe weather may be possible Friday morning, but otherwise, severe
weather potential will be low as high pressure builds east of the MS
River in its wake.
By this weekend, return flow is anticipated across portions of the
southern Plains, but destabilization remains uncertain. A zonal
mid-level pattern with multiple embedded shortwave troughs is
currently forecast during that timeframe which commonly results in
considerably low predictability. Regardless of the exact outcome
over the weekend, there is general consensus for zonal flow and a
ridge building across the western CONUS and into the Plains. In
general, this will likely not support a significant severe weather
threat.
Read more
Day 4-8 Outlook
Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0356 AM CST Sun Dec 14 2025
Valid 171200Z - 221200Z
...DISCUSSION...
Northward moisture return is expected to persist through the period
on D4/Wednesday as a strong surface low moves across the northern
Plains and Upper Midwest and strong southerly flow expands across
much of the warm sector. Despite the moisture advancing well inland,
warm air aloft should limit strong thunderstorm potential on
D4/Wednesday.
By D5/Thursday, weak to moderate instability is expected from East
Texas to the Mid-Mississippi Valley. Strong shear will be present
north of I-20 as a mid-level trough amplifies and a strong mid-level
jet overspreads the warm sector. Despite the presence of strong
shear and weak to moderate instability, updraft intensity may still
struggle due to weak lapse rates/warm air aloft. Only weak height
falls/cooling temperatures aloft are forecast south of the MO
Bootheel. Thunderstorms are likely from the Mid-Mississippi Valley
northward, where forcing will be stronger, but these regions will
remain well north of the more favorable instability. Therefore, any
severe weather threat would likely be marginal.
The cold front, associated with the storm system on D5/Thursday,
will move off the East Coast early on D6/Friday. Some marginal
severe weather may be possible Friday morning, but otherwise, severe
weather potential will be low as high pressure builds east of the MS
River in its wake.
By this weekend, return flow is anticipated across portions of the
southern Plains, but destabilization remains uncertain. A zonal
mid-level pattern with multiple embedded shortwave troughs is
currently forecast during that timeframe which commonly results in
considerably low predictability. Regardless of the exact outcome
over the weekend, there is general consensus for zonal flow and a
ridge building across the western CONUS and into the Plains. In
general, this will likely not support a significant severe weather
threat.
Read more
Day 4-8 Outlook
Day 4-8 Convective Outlook
NWS Storm Prediction Center Norman OK
0356 AM CST Sun Dec 14 2025
Valid 171200Z - 221200Z
...DISCUSSION...
Northward moisture return is expected to persist through the period
on D4/Wednesday as a strong surface low moves across the northern
Plains and Upper Midwest and strong southerly flow expands across
much of the warm sector. Despite the moisture advancing well inland,
warm air aloft should limit strong thunderstorm potential on
D4/Wednesday.
By D5/Thursday, weak to moderate instability is expected from East
Texas to the Mid-Mississippi Valley. Strong shear will be present
north of I-20 as a mid-level trough amplifies and a strong mid-level
jet overspreads the warm sector. Despite the presence of strong
shear and weak to moderate instability, updraft intensity may still
struggle due to weak lapse rates/warm air aloft. Only weak height
falls/cooling temperatures aloft are forecast south of the MO
Bootheel. Thunderstorms are likely from the Mid-Mississippi Valley
northward, where forcing will be stronger, but these regions will
remain well north of the more favorable instability. Therefore, any
severe weather threat would likely be marginal.
The cold front, associated with the storm system on D5/Thursday,
will move off the East Coast early on D6/Friday. Some marginal
severe weather may be possible Friday morning, but otherwise, severe
weather potential will be low as high pressure builds east of the MS
River in its wake.
By this weekend, return flow is anticipated across portions of the
southern Plains, but destabilization remains uncertain. A zonal
mid-level pattern with multiple embedded shortwave troughs is
currently forecast during that timeframe which commonly results in
considerably low predictability. Regardless of the exact outcome
over the weekend, there is general consensus for zonal flow and a
ridge building across the western CONUS and into the Plains. In
general, this will likely not support a significant severe weather
threat.
Read more
SPC 0830Z Day 3 Outlook
Day 3 Convective Outlook
NWS Storm Prediction Center Norman OK
0228 AM CST Sun Dec 14 2025
Valid 161200Z - 171200Z
...NO SEVERE THUNDERSTORM AREAS FORECAST...
...SUMMARY...
A few thunderstorms are possible in the Pacific Northwest on Tuesday
and Tuesday night.
...Discussion...
As high pressure moves from the Southeast into the Atlantic, and
weak lee troughing develops across the High Plains, southerly return
flow returns across the Plains on Tuesday. Some showers may develop
within weak isentropic ascent across east Texas on Tuesday night,
but most guidance shows minimal instability until after 12Z
Wednesday. Therefore, thunderstorm activity is not expected.
Thunderstorms are possible in western Washington and far northwest
Oregon on Tuesday and Tuesday night as a strong mid-level trough
approaches the coast. Weak instability is expected during the
afternoon, but most forecast soundings suggest the equilibrium level
will be too low for charge separation which may keep any lightning
potential isolated. However, by late Tuesday night/early Wednesday,
as cold air aloft overspreads the region, sufficiently deep
instability is expected for lightning across western Washington and
perhaps into northwest Oregon. During this time, more frequent
lightning may be possible with a line of convection along the
surface front.
..Bentley.. 12/14/2025
Read more
