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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 230600
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0100 AM CDT Mon Mar 23 2026
Valid 231200Z - 241200Z
...Synopsis...
An upper-level trough will modestly amplify in the Northeast today.
A cold front will push southward through the southern Appalachians.
Farther west, a weak lee trough will help to enhance surface winds
on the western flank of a surface high.
...Piedmont...
Dry, downslope winds off of the southern Appalachians will promote
elevated fire weather this afternoon. Winds of 15-20 mph will be
possible in the lee of the terrain. RH is not as certain, but 25-30%
appears probable. Values closer to 20% may occur locally.
...Central Plains...
An enhanced surface pressure gradient will develop as a weak lee
trough deepens on the westerly flank of a seasonably strong surface
high in the Upper Midwest. Surface winds of 15-20 mph are possible.
How low RH will drop during the afternoon is the biggest uncertainty
in this scenario. Copious mid/high-level cloud cover is expected.
Most guidance suggests RH will be only marginally below elevated
criteria. Furthermore, the strongest winds may be slightly displaced
from the lowest RH. Overall, locally elevated conditions are
expected given dry fuels, but broad, sustained elevated conditions
are much less certain.
...Southwest into central High Plains...
Very dry conditions will exist from the Southwest into southeast
Colorado. RH of 10-20% is expected by the afternoon. Winds in most
locations will be relatively weak. Terrain-enhanced wind could reach
up to 20 mph. Locally elevated to near critical conditions could
occur.
..Wendt.. 03/23/2026
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U.S. Day 2 Fire Weather Outlook
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 230607
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0107 AM CDT Mon Mar 23 2026
Valid 241200Z - 251200Z
...NO CRITICAL AREAS...
...Synopsis...
The western upper-level ridge will amplify on Tuesday. With the
eastern surface high weakening and moving offshore, the surface
pressure gradient will weaken compared to previous days. Pockets of
marginally dry and breezy conditions may occur in central Plains and
the Midwest. A weak lee trough will also encourage localized dry and
windy conditions in the immediate lee of southern/central Rockies.
Given the marginal fire weather conditions expected, only localized
concerns are expected at this time.
..Wendt.. 03/23/2026
U.S. Day 3-8 Fire Weather Outlook
ZCZC SPCFWDD38 ALL
FNUS28 KWNS 222040
Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0340 PM CDT Sun Mar 22 2026
Valid 241200Z - 301200Z
An upper level ridge continues to build back across the western US
on Day 3/Tuesday. Although less intense and shorter in duration than
the recent heatwave, this will once again likely break daily high
temperature records over much of the southern two-thirds of the
western US. On Day 4/Wednesday, a potent upper-level trough
approaches the Pacific Northwest and will significantly dampen the
amplitude of the ridge as it moves across the northern CONUS border
on Day 5/Thursday. The jet max will exit the Eastern Seaboard on Day
6/Friday. While some differences exist among various forecast
guidance, the western US upper-level ridge will likely build back by
next weekend. Forecast guidance suggests that this ridge will be
nudged eastward by a robust trough moving across the northern
Pacific, but the timing and speed of this movement is uncertain at
this point.
On Day 4/Wednesday, as the ridge over the western US breaks down,
warm surface temperatures will support a robust boundary layer,
mixing strong westerly winds associated with the passing upper-level
jet to the surface. Forecast guidance indicates sustained west winds
of 20-30 mph will combine with RHs of 10-20% at the surface for
several hours during the afternoon. This warrants a 70% area for
much of east-central Wyoming while 40% probabilities cover portions
of northern Colorado, extreme northeast Utah, extreme southwest
South Dakota, and much of the Nebraska Panhandle where surface winds
will be slightly weaker.
On Day 5/Thursday, a cold front, supported by the aforementioned
passing upper-level trough, is expected to surge south across the
central and southern Plains. The 40% probability area was expanded
slightly east due to forecast guidance advecting drier conditions
farther across the southern Plains. While uncertainty in the timing
and evolution of this front will likely necessitate adjustments to
the risk area over the coming days, the southern High Plains
currently stands the best chance to experience critical fire weather
conditions with the frontal passage.
On Day 7/Saturday, northerly winds behind the cold front passing
through the Southeast CONUS late on Day 6/Friday could produce
downslope flow, contributing to lower RHs and gusty surface winds
once again. However, precipitation between now and then is likely
across portions of the area. Where rainfall may accumulate will
likely dictate the extent of any fire weather concerns over this
region. No areas have been introduced, but this region will be
watched over the coming days.
..Stearns.. 03/22/2026
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