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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 031650
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1050 AM CST Wed Dec 03 2025
Valid 031700Z - 041200Z
...NO CRITICAL AREAS...
No change to the Day 1 Fire Weather Outlook with benign fire weather
and/or fuel conditions across CONUS. A southward progressing cold
front moving through the Desert Southwest is initiating an offshore
wind event across southern CA this morning. Surface high pressure
settling into the Great Basin will maintain the offshore pressure
gradient, supporting east-northeast winds within favored terrain and
gaps through tonight. Despite elevated east-northeast winds of 15-25
mph and relative humidity dropping to around 15%, relatively cool
temperatures and marginal fuel dryness should mitigate significant
wildfire spread potential.
..Williams.. 12/03/2025
.PREV DISCUSSION... /ISSUED 1148 PM CST Tue Dec 02 2025/
...Synopsis...
On the backside of a midlevel trough moving across the Four Corners
region, high pressure over the Intermountain West will promote an
enhanced offshore pressure gradient across southern CA. While
locally dry/breezy conditions are expected (especially across
wind-prone mountains and valleys), marginal fuels should limit most
fire-weather concerns.
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U.S. Day 2 Fire Weather Outlook
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 031927
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0127 PM CST Wed Dec 03 2025
Valid 041200Z - 051200Z
...NO CRITICAL AREAS...
No changes to the Day 2 Fire Weather Outlook with minimal fire
weather concerns across the contiguous U.S. An ongoing offshore wind
event from the east-northeast will begin to wane Thursday afternoon
across southern CA as surface pressure gradients relax throughout
the day. Existing marginal fuel conditions should reduce wildfire
spread potential, limiting impacts from the dry and locally breezy
winds.
..Williams.. 12/03/2025
.PREV DISCUSSION... /ISSUED 1148 PM CST Tue Dec 02 2025/
...Synopsis...
Surface high pressure over the Intermountain West will favor another
day of locally dry/breezy offshore flow across portions of southern
CA. While locally elevated fire-weather conditions are possible,
marginal fuels should limit most concerns.
U.S. Day 3-8 Fire Weather Outlook
ZCZC SPCFWDD38 ALL
FNUS28 KWNS 022058
Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0258 PM CST Tue Dec 02 2025
Valid 041200Z - 101200Z
...Synopsis...
Cold surface high pressure should be the predominant feature across
much of the Midwest, Great Lakes and Northeast as persistent
northwesterly flow aloft remains over the eastern U.S. through early
next week. Mid-level short waves interacting with deeper boundary
layer moisture and surface frontal features should bring widespread
precipitation to much of the Deep South through the weekend, further
mitigating fire weather concerns. Farther west, complimentary
upper-level ridging nosing into the CA coast should maintain above
normal temperatures and minimal precipitation across much of the
lower elevations of the Southwest, Great Basin and lower CO River
Basin through early next week. However, multiple short waves within
the broader northwesterly flow should bring ample mountain snow and
lower fire weather concerns overall across the Intermountain West.
...Day 5/Saturday - Southern Plains...
Lee cyclogenesis across the central/southern Plains in response to
increasing northwesterly flow over the central/southern Rockies
could support dry and breezy conditions across portions of eastern
NM/West TX on Saturday. However, forecast uncertainty remains
elevated regarding strength and location of incipient surface low
across the central/southern Plains Saturday. Marginal expected fuel
dryness could also limit overall fire weather threat which precludes
introduction of critical probabilities at this time.
..Williams.. 12/02/2025
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