|
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 151621
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1021 AM CST Mon Dec 15 2025
Valid 151700Z - 161200Z
...NO CRITICAL AREAS...
Fire weather potential remains limited for today. Dry conditions are
noted across portions of the Southeast where RH values are falling
into the low 30s. While dry conditions will continue, a combination
of weak winds and recent rainfall should mitigate more substantial
fire concerns. Elsewhere, localized elevated conditions appear
likely within the immediate lee of the Laramie Mountains in
southeast WY, but as with yesterday, these conditions are expected
to remain sufficiently localized to preclude highlights. See the
previous discussion for additional details.
..Moore.. 12/15/2025
.PREV DISCUSSION... /ISSUED 1126 PM CST Sun Dec 14 2025/
...Synopsis...
Cold air will continue to move into the Southeast today. Some dry
and breezy return flow is possible in the southern Plains, but cool
temperatures/higher RH will also be present. The most likely
location for localized fire weather concerns will be east of the
terrain in southeastern Wyoming. There, downslope warming and breezy
conditions supported by a weak lee trough and modest mid-level flow
will promote potentially elevated conditions. However, the
duration/intensity of those conditions is too much in doubt for
highlights.
|
U.S. Day 2 Fire Weather Outlook
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 151903
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0103 PM CST Mon Dec 15 2025
Valid 161200Z - 171200Z
...NO CRITICAL AREAS...
The previous forecast remains on track with limited potential for
widespread fire weather concerns expected across the country for
Tuesday. Latest guidance continues to depict dry conditions across
the Southeast, but weak winds are expected under a surface high.
Localized elevated fire weather conditions may develop within the
immediate lee of the CO Front Range and the Sacramento Mountains in
NM; however, modest synoptic winds will limit the coverage of
elevated meteorological conditions over a region with marginally dry
fuels.
..Moore.. 12/15/2025
.PREV DISCUSSION... /ISSUED 1132 PM CST Sun Dec 14 2025/
...Synopsis...
Some modest breakdown of the upper ridge across the CONUS can be
expected on Tuesday. A weak front will move out of the High Plains.
There will be some increase in mid-level winds across the Rockies as
well. Where sufficient downslope warming occurs within the
central/southern High Plains, fire weather could approach elevated
criteria locally. Confidence in location/duration are too limited
for highlights.
U.S. Day 3-8 Fire Weather Outlook
ZCZC SPCFWDD38 ALL
FNUS28 KWNS 152147
Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0347 PM CST Mon Dec 15 2025
Valid 171200Z - 231200Z
Fire weather concerns are expected to gradually increase through the
work week and into the weekend across the south-central CONUS,
though uncertainty remains high regarding which days/areas will see
the greatest fire weather threat. Latest long-range guidance
continues to trend towards an amplifying upper wave over the central
U.S. Late Wednesday into Thursday with an attendant cyclone
intensifying over the northern Plains/Great Lakes region. A second,
though lower amplitude, upper trough will progress across the
country late Friday into Saturday, supporting a second surface low
developing during the same period. These two systems will support
rain/snow chances across much of the country with the exception of
the Southwest and southern Plains where dry conditions will prevail.
...D3/Wednesday to D6/Saturday - Southern High Plains/Plains...
The fuel landscape is expected to gradually improve through the work
week as temperatures warm to the 75-90th percentiles of seasonal
normal and promote steady drying of dead/dormant fine fuels. The
intensification of a surface low over the northern High Plains on
D3/Wed will promote strengthening southwesterly winds across the
central to southern High Plains. Antecedent dry conditions coupled
with increasing winds should promote areas of elevated fire weather
conditions across northeast NM to southeast CO. 40% risk
probabilities have been introduced where ensemble agreement shows
the highest potential for a prolonged fire weather threat.
A cold front is forecast to push into the central/southern Plains
through D4/Thursday. Strong northwest winds are expected behind the
front with some reduction in RH likely within the post-frontal air
mass across southern KS into OK and northwest TX. While some
guidance, notably recent runs of the GFS, show widespread elevated
to critical fire weather conditions, other solutions are less
bullish on the overlap of 20+ mph winds and sub-25% RH. Although the
potential for critical conditions is noted, the disparity between
deterministic solutions and weak ensemble signals limit confidence
in this potential.
A rapid return to a southerly dry return flow regime is expected by
D5/Friday across the southern Plains as a surface low intensifies
over the Dakotas. A cold frontal passage is anticipated on
D6/Saturday with dry/windy conditions possible within the
pre-frontal air mass. 15-20 mph winds appear probable both days
across eastern NM into northwest TX, OK and southern KS, through
large spread regarding RH reductions within both regimes is noted.
As with D4/Thursday, poor agreement in wind speed/RH reductions
among deterministic guidance and weak ensemble signals suggest the
predictability of the fire weather threats on either day remains
limited at this range.
..Moore.. 12/15/2025
|