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 260548
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1248 AM CDT Thu Jun 26 2025
Valid 261200Z - 271200Z
...NO CRITICAL AREAS...
...Synopsis...
Fire weather concerns are expected to remain limited for today
across the country. Widespread rainfall over the eastern two-thirds
of the country will limit fuel status for most locations. West of
the Rockies, dry conditions will continue with afternoon RH minimums
in the teens expected. However, the strongest low/mid-level flow is
expected to remain across the Pacific Northwest (where RH reductions
won't be as pronounced) ahead of a low-amplitude mid-level trough.
Localized elevated conditions may materialize across portions of
southern ID and northern NV where the overlap of dry conditions,
receptive fuels, and modest surface winds (15-20 mph) is most
probable. Latest high-res ensemble guidance generally shows a weak
signal for widespread and/or persistent elevated conditions, which
limits confidence in the overall fire weather threat.
..Moore.. 06/26/2025
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U.S. Day 2 Fire Weather Outlook
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 260549
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1249 AM CDT Thu Jun 26 2025
Valid 271200Z - 281200Z
...Synopsis...
Elevated fire weather conditions are expected across parts of
central to southwest Wyoming Friday afternoon. Strengthening zonal
flow over the northern Rockies will promote a more pronounced
surface mass response across the northern High Plains on Friday
compared to today/Thursday. Consequently, low-level winds will
likely be slightly stronger across a broad swath of the eastern
Great Basin and parts of the Four Corners region. In general, most
locations from eastern NV into northern AZ, UT, southern ID, and WY
will see breezy conditions with wind speeds generally in the mid
teens. Across southwest to central WY, downslope flow into the WY
Basin and in the lee of the Wind River Range will regionally augment
surface winds to near 20 mph. Deep mixing will promote frequent
gusts up to 25-30 mph by peak heating as RH values fall into the
teens. Several hours of elevated conditions appear likely, and
periods of critical conditions are possible. Fuels across much of WY
are not as dry compared to locations southwest, but several hours of
dry/windy conditions should promote adequate drying of dead finer
fuels to support the fire weather concern. An expansion of the
Elevated risk area appears possible if confidence in
sustained/widespread 15+ mph winds increases across portions of the
Great Basin/Four Corners region where fuels remain very dry.
..Moore.. 06/26/2025
U.S. Day 3-8 Fire Weather Outlook
ZCZC SPCFWDD38 ALL
FNUS28 KWNS 252155
Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0455 PM CDT Wed Jun 25 2025
Valid 271200Z - 031200Z
...Synopsis...
A weak upper-level trough will move across the Pacific Northwest
Day 3/Friday into the Great Lakes by Day 6/Monday. Early next week,
a ridge will strengthen across the Intermountain West bringing
lighter surface winds but well above normal temperatures for much of
the Western U.S. Weak troughing will remain off the West Coast, with
potential for locally breezy conditions and mix of wet/dry
thunderstorms.
...Day 3-4/Friday-Saturday...
Generally weak upper flow with the western trough will promote
lighter, mainly terrain driven winds across much of the
Intermountain West and Southwest into early next week. A few hours
of Elevated to locally Critical conditions will be possible across
portions of the Columbia Basin into the Snake River Plain in Idaho
D3/Friday and D4/Saturday.
...Day 5/Sunday - Day 7/Tuesday...
A weak trough will push the western ridge eastward across the Divide
and Rockies early next week. There is some potential for increasing
winds but also moisture for thunderstorms across the Pacific
Northwest and perhaps as far south and portions of the Sierra.
Initially, a risk of dry thunderstorms will be possible across
central Oregon into the Cascades. For now, confidence in moisture
and position of the trough remains too low to include probabilities.
..Thornton.. 06/25/2025
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