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U.S. & Canada 00-UTC 48 Hour Surface Smoke Forecast
Map is in operation from early April through October 31
U.S. Day 1 Fire Weather Outlook
ZCZC SPCFWDDY1 ALL
FNUS21 KWNS 150638
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0138 AM CDT Sat Aug 15 2026
Valid 151200Z - 161200Z
...Synopsis...
A prominent upper ridge over the central US is forecast to continue
building rapidly with weak upper-level troughing remaining over the
northwestern US. Scattered showers and thunderstorms remain likely
on the periphery of the ridge near the upper trough and a belt of
monsoon moisture. Under the ridge, excessively hot temperatures are
again likely over the Plains and central US supporting low afternoon
humidity, breezy winds and an elevated fire-weather risk.
...Northwest...
Along the northern periphery of the expanding upper ridge, weak
upper troughing and monsoon moisture will support another day of
showers and thunderstorms. Scattered thunderstorms should develop
over the higher terrain of central OR and the WA Cascades before
spreading northeastward through the day. Despite several prior days
of rainfall, some fuels remain receptive. Near the upper trough,
faster moving thunderstorms (25-30 mph forward motions), are
expected and should limit rainfall supporting some drier storms.
To the east over parts of eastern OR into ID, a mix of wet/dry
storms is expected with slower storm speeds. Fuels here are also not
as receptive within a broader swath of observed wetting rain.
However, greater storm coverage should favor increased lightning
potential. Some drier strikes are possible outside the heavier
precip cores, supporting some risk for lightning ignitions in the
remaining dry fuels.
...Southern Plains...
Another day of very hot, dry and breezy conditions is expected south
of a weak frontal boundary over portions of northwest OK and the TX
Panhandle this afternoon. As the upper ridge continues to build
flow will be weaker with south winds of around 15 mph. However,
afternoon highs in the 100s F and RH falling to as low as 15 percent
will overlap with very dry fuels and recent notable fire activity. A
few hours of elevated fire-weather conditions are possible across
parts of the TX Panhandle, northwest OK into far southern KS.
..Lyons.. 08/15/2026
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U.S. Day 2 Fire Weather Outlook
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 150640
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0140 AM CDT Sat Aug 15 2026
Valid 161200Z - 171200Z
...NO CRITICAL AREAS...
...Synopsis...
The upper ridge over the central US is forecast to flatten Sunday as
the western US trough and a weak subtropical disturbance move across
the northern periphery. This will help force the stalled front over
the Plains southward. Showers and thunderstorms will remain likely
over the Intermountain West and across the Southern Plains where
monsoon moisture remains.
...Southern Plains...
The stalled front over the Plains is forecast to move southward
Sunday with showers and storms developing along it across parts of
the TX Panhandle into OK. These storms may develop over ares of very
dry fuels with the potential for lightning. While some risk for
strikes is possible, slow storm speeds and increasing moisture along
the front suggest limited potential for dry storms.
...Northwest and northern Rockies...
Another day of showers and storms is likely Sunday as the upper
trough moves eastward and monsoon moisture remains in place. Several
days of preceding storms will limit available dry fuels.
Additionally, slower storm speeds will favor a wetter storm mode
over areas that have received substantial wetting rains. This will
limit ignition potential. However, sporadic strikes are still
possible within locally more receptive fuels from eastern OR/WA into
parts of ID.
..Lyons.. 08/15/2026
U.S. Day 3-8 Fire Weather Outlook
ZCZC SPCFWDD38 ALL
FNUS28 KWNS 142148
Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0448 PM CDT Fri Aug 14 2026
Valid 161200Z - 221200Z
...Synopsis...
Mid/upper troughing near the West Coast will wane as the upper ridge
across the central US retrogrades westward by early Day 4/Monday,
allowing drier conditions to infiltrate much of the Great Basin and
Cascades. A mid-level short wave arriving early next week along with
residual monsoonal moisture could bring additional thunderstorms to
portions of the Northern Rockies Day 4/Monday, while also promoting
dry and breezy conditions across portions of the northern Great
Basin. Forecast uncertainty increases Day 6 onward as ensemble
spread reduces predictability in the longer term across the western
U.S. as fuels likely rebound to the drier side from recent monsoon
moisture.
...Day 4/Monday...
...Central Idaho and the Northern Rockies...
The aforementioned short wave moving into the Northwest, lingering
monsoonal moisture and daytime heating will promote a favorable
convective environment across portions of the Northern Rockies,
central ID and perhaps into northeastern OR on Day 4/Monday.
However, preceding days of showers and thunderstorms and good
overnight RH recoveries could temporarily reduce fuel receptiveness
leading up to this event. Although critical probabilities were not
introduced for this outlook, the dry thunderstorm threat will be
monitored for inclusion in future outlooks once assessment of
rainfall distribution becomes clearer.
...Northwestern California, southern Oregon and northwestern
Nevada...
The same short wave and attendant mid-level speed max will likely
bring dry and breezy conditions to parts of the northern Great Basin
into northwestern CA on Day 4/Monday. A relative minimum of rainfall
has been observed in this area over the last several days of
monsoon-related showers and thunderstorms across the broader western
U.S. A warming and drying trend is expected with the arrival of
stronger west/southwest winds. This coupled with existing dry fuels
will increase fire weather concerns, where 40 percent critical
probabilities were introduced for northeastern CA, northwestern NV
and southern OR for Day 4/Monday.
...Day 5/Tuesday - Southern Plains...
Expanding drought and continued above normal 100F+ temperatures will
most likely stay in place through next week across portions of the
Southern Plains. Increasing southerly winds are expected to evolve
south of a nascent Central Plains surface low/trough over portions
of the northwest TX and western OK. South winds of 15-20 mph
collocated with low afternoon RH and very dry fuels will bring an
enhanced fire weather concern to the area Day 5/Tuesday, with 40
percent critical probabilities introduced.
..Williams.. 08/14/2026
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