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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 080442
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1142 PM CDT Wed Oct 07 2026
Valid 081200Z - 091200Z
...NO CRITICAL AREAS...
...Synopsis...
A jet streak will round the base of the upper-level trough over the
New England states later today. Meanwhile, a cold front accompanying
this system will continue progressing southeast through much of the
Northeast CONUS and Mid-Atlantic area by this evening. While
northwesterly winds behind the front could gust up to 20-30 mph,
these strongest speeds will likely remain constrained to the Great
Lakes region. Regardless, RHs struggle to drop below 30% behind this
frontal passage. Sub-critical fuels amid heightened humidity will
preclude any significant fire weather threat.
..Stearns.. 10/08/2026
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U.S. Day 2 Fire Weather Outlook
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 080544
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1244 AM CDT Thu Oct 08 2026
Valid 091200Z - 101200Z
...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF NORTHEAST WYOMING...
...Synopsis...
On Day 2/Friday, an upper-level trough advancing southeastward into
the Pacific Northwest, paired with a surface cold front, will create
impactful fire weather conditions across portions of the northern
and western CONUS. Prolonged dry, warm conditions beneath a
persistent upper-level ridge have significantly cured fuels
throughout the region. Energy Release Components are forecast to
exceed the 80th percentile across the highlighted risk areas prior
to the onset of stronger winds.
...Much of Wyoming, central Montana, southwestern South Dakota, and
far northwest Nebraska...
Enhanced west-southwesterly flow on Day 2/Friday will drive
well-above-normal temperatures and promote seasonally deep
boundary-layer mixing. A tightening surface pressure gradient, tied
to a deepening lee low further north, and a southward progressing
cold front, transiting through Montana around sunset, will bring
drier air into the region with minimum RH values falling to 15 to 20
percent. In tandem, sustained west-southwest surface winds ahead of
the aforementioned front will increase to 15 to 20 mph across much
of the northern High Plains and adjacent terrain, warranting an
Elevated fire weather area.
Furthermore, a Critical fire weather area has been introduced for
portions of northeastern Wyoming. This corridor is expected to
experience the most favorable overlap of strong southwest winds
sustained at 20 to 25 mph, critically low afternoon RH values
between 10 and 20 percent, and highly receptive fuels near the 90th
ERC percentile.
...Southeast Oregon, Northeast California, and the far western Great
Basin...
West-southwesterly flow will similarly support anomalously warm
temperatures and seasonally deep mixing across this region. As the
surface pressure gradient tightens ahead of the approaching cold
front, west-southwest surface winds will strengthen to 15 to 20 mph
and turn toward the northwest as the front passes through
southeastern Oregon in the late afternoon. Combined with afternoon
relative humidity values dropping to near 15 to 20 percent over dry
fuels, these conditions will support a targeted Elevated fire
weather threat.
..Stearns.. 10/08/2026
U.S. Day 3-8 Fire Weather Outlook
ZCZC SPCFWDD38 ALL
FNUS28 KWNS 072158
Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0458 PM CDT Wed Oct 07 2026
Valid 091200Z - 151200Z
...Synopsis...
An upper ridge over the western CONUS will break down as an
upper-level trough dives southward through the weekend. This system
will bring increased winds, but also usher in cooler temperatures
and precipitation chances over the Intermountain West into early
next week. On Days 5-6/Sunday-Monday, gusty northerly winds behind
the trough may overlap portions of northern CA where fuels have
grown increasingly receptive.
A tropical system is expected to impact the central Gulf Coast later
this week/weekend, bringing precipitation chances to portions of the
MS Valley and Mid-South this weekend where ERCs are approaching the
80-90th percentile. Prior to the arrival of deeper Gulf moisture,
dry and locally breezy conditions may overlap pockets of receptive
fuels in the lower MS Valley on Day 3/Friday.
...Days 3-4/Friday-Saturday...
Ahead of the aforementioned trough approaching the Pacific
Northwest, increasing southwesterly flow will support widespread
strong surface winds (sustained near 20 mph) amid above-normal
temperatures and afternoon RH near 10-20%. Additionally, a southward
progressing dry cold front and accompanying wind shift will enhance
fire weather concerns. After several days of dry conditions and
above-normal temperatures through the workweek, fuels will be
conditioned for ignition across much of the central latitudes of the
western CONUS. Thus, 40% probabilities of Critical wind/RH
conditions have been maintained over the northwestern Great Basin
and much of MT/WY on Day 3/Friday.
Guidance has continued to trend towards a lower likelihood of
Critical fire weather conditions in southwestern WY on Day
4/Saturday, resulting in a more confined area of 40% Critical
probabilities. A cold front is expected to stall across the northern
Great Basin, potentially allowing an area of dry and breezy
conditions to evolve east of the northern Sierra into central NV.
Additional probabilities may be needed as confidence increases in
the overall pattern evolution.
..Elizalde-Garcia.. 10/07/2026
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