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U.S. & Canada 12-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 160454
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1154 PM CDT Tue Sep 15 2026
Valid 161200Z - 171200Z
...Synopsis...
A mid-level low sliding southward from the Pacific Northwest will
stall over northern California this afternoon, increasing deep-layer
southwesterly flow across the Great Basin. Hot and dry conditions
will continue across Texas and Oklahoma as high pressure expands
into the central U.S., though much lighter winds will limit broader
fire weather concerns.
...Central Nevada...
Elevated fire weather conditions are expected this afternoon where
dry and breezy south-southwesterly winds of 15-20 mph amid minimum
RH values of 10-15% overlap drying fuels. RH may decline to less
than 10% in some valleys, but marginal fuel receptiveness will mute
a more significant fire weather concern across the area.
..Elizalde-Garcia.. 09/16/2026
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U.S. Day 2 Fire Weather Outlook
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 160455
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1155 PM CDT Tue Sep 15 2026
Valid 171200Z - 181200Z
...Synopsis...
Expanding high pressure over the Southeast and central U.S will
contribute to widespread above normal temperatures and dry
conditions on Day 2/Thursday. Meanwhile, a mid-level low will remain
centered over northern California/southern Oregon, maintaining
strong southwesterly flow over the Great Basin. Consecutive days of
dry and windy conditions have led to drying fuels across central
Nevada, increasing fire concerns. Sufficient daytime mixing will
promote south-southwesterly sustained winds of 15-20 mph and RH
values of less than 15%, supporting the introduction of Elevated
highlights across the region.
..Elizalde-Garcia.. 09/16/2026
U.S. Day 3-8 Fire Weather Outlook
ZCZC SPCFWDD38 ALL
FNUS28 KWNS 152127
Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0427 PM CDT Tue Sep 15 2026
Valid 171200Z - 231200Z
...Synopsis...
An upper-low over northern CA and attendant mid-level jet over the
Great Basin will sustain fire weather concerns across portions of NV
for D3/Thursday. Higher-based showers and thunderstorms are expected
over portions of northern CA and OR D3/Thursday, and the northern
Rockies on D4/Friday as the low pivots northeastward, but marginal
fuels should suppress new ignitions across this region. Additional
showers and thunderstorms amid deeper atmospheric moisture across
the Southwest are forecast across the Four Corners region into the
central Rockies, further quelling fire weather concerns through the
weekend across much of the Intermountain West.
Anomalously strong upper ridging across the southeastern U.S. will
keep above normal temperatures and mainly dry conditions over the
Southern Plains and Lower MS River Valley through at least
D5/Saturday. This should keep quite receptive fuels in place
although alignment of winds and sufficiently low daytime RH should
limit a broader fire weather threat across this region. A cold front
and associated much needed rainfall should push into the
central/southern Plains early next week temporarily reducing overall
fire weather threat for Days 5-8/Sunday-Tuesday.
...Day 3/Thursday - Central Nevada...
A ~50 knot mid-level jet pivots into the Great Basin as an upper low
meanders over northern CA on D3/Thursday. A corridor of dry
southwesterly flow with wind speeds of up to 20 mph and RH around
15% will yield a fire weather threat across portions of central NV
where 40% critical probabilities were maintained.
..Williams.. 09/15/2026
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