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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 120649
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0149 AM CDT Sun Jul 12 2026
Valid 121200Z - 131200Z
...CRITICAL FIRE WEATHER AREA FOR SOUTHERN MONTANA INTO PORTIONS OF
IDAHO AND NORTHERN WYOMING...
...Synopsis...
An upper-level trough and associated jet streak is forecast to
progress east-northeastward from British Columbia into the interior
Canadian provinces today as an upper-level ridge moves from the
Great Basin into the High Plains. Residual flow across the Pacific
Northwest from the ejecting trough and a deepening surface low
across eastern Montana will be responsible for Elevated to Critical
fire-weather concerns across the Intermountain West to the northern
High Plains.
...Southern Montana into portions of Idaho and northern Wyoming...
As a surface low deepens over eastern Montana this afternoon into
the evening, the intensifying surface pressure gradient will result
in sustained winds of 20-25 MPH across much of the area. Relative
humidity of 10-15% is expected across portions of Idaho into
southwestern Montana, and could get as low as 5-10% in south-central
Montana into northern Wyoming. With ERCs largely in the 80th-95th
annual percentiles across the region, Critical fire-weather
conditions are forecast. As the surface low moves eastward and a
cold front moves through the area, winds will shift from largely
southerly to west-northwesterly but should still be gusting 20-25
MPH.
...Northern High Plains...
Strong southeasterly surface flow ahead of the deepening cyclone
should result in sustained 15-20 MPH winds across the far western
Dakotas into portions of Wyoming and Montana. Relative humidity is
forecast to be in the range of 5-15%, getting more moist with
eastward extent. While ERCs are largely in the 90th-95th annual
percentile range, this guidance does not account for live fuels and
the current state of green vegetation. Given the uncertainty in the
quality of fuels with this eastward extent, Elevated fire-weather
highlights have been maintained -- though periods of Critical
meteorological conditions will be possible.
...Southern Oregon into portions of northern Nevada and
California...
Lingering dry and breezy conditions in the wake of the ejecting
mid-level jet streak will persist this afternoon across portions of
northeastern California/northwestern Nevada into southern Oregon.
Winds of 15-20 MPH and relative humidity around 15-20% will overlap
with modestly receptive fuels, resulting in Elevated fire-weather
concerns.
...Southern and Central California...
Isolated to scattered high-based showers appear possible across
portions of California. Occasional lightning is possible, but
limited buoyancy puts the likelihood at less than 10% coverage.
Portions of the Mojave and Sonoran Deserts may see a mix of wet and
dry thunderstorm activity, but uncertainty in the coverage and
rainfall amounts precludes highlights at this time.
..Halbert.. 07/12/2026
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U.S. Day 2 Fire Weather Outlook
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 120652
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0152 AM CDT Sun Jul 12 2026
Valid 131200Z - 141200Z
...Synopsis...
As an upper-level trough and associated jet streak translates
eastward across the Canadian Prairie on Monday, ridging will
intensify over much of the Central US. Southerly and southeasterly
flow around the western periphery of this ridge will transport
monsoonal moisture northward into the Western US, resulting in a few
pockets of dry/wet thunderstorms. Additionally, dry and breezy
conditions across the central and northern High Plains will support
Elevated fire-weather concerns.
...Northern Colorado into Wyoming and portions of western South
Dakota...
Dry and windy conditions are forecast across portions of the central
and northern High Plains on Monday, as surface winds respond to a
lee trough. These winds are anticipated to be around 15-20 MPH, with
relative humidity varying between 10-20%. Dead fuels guidance has
ERCs in the 95th annual percentile range, but some semi-recent
rainfall and live vegetation will serve to reduce some of the
volatility of those fuels. At least Elevated fire-weather concerns
are forecast at this time.
...Southwestern Montana and Northeastern California/Northwestern
Nevada...
Monsoonal moisture transported northward along the western periphery
of the mid-level ridge will bring showers and thunderstorms to
portions of the Intermountain West. While anticipated to be a mix of
wet and dry thunderstorms, isolated dry thunderstorm highlights were
introduced to portions of northeastern California into northwestern
Nevada on Monday. This mix of wet and dry thunderstorms will overlap
with receptive fuels, and lightning on the periphery of the wetter
downdrafts will still be capable of wildfire ignitions.
In far southwestern Montana, a more classic isolated dry
thunderstorm environment is forecast. Precipitable water content of
0.5-0.75" is forecast where HREF/REFS guidance shows thunderstorm
activity developing. Proximity soundings to this thunderstorm
activity shows deep inverted-V profiles and relatively fast storm
motions. This should result in limited precipitation efficiency of
thunderstorm activity overlapping with critically receptive fuels.
..Halbert.. 07/12/2026
U.S. Day 3-8 Fire Weather Outlook
ZCZC SPCFWDD38 ALL
FNUS28 KWNS 112205
Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0505 PM CDT Sat Jul 11 2026
Valid 131200Z - 191200Z
A strong upper high will develop and persist over the
central/northern Plains into the Midwest through at least midweek.
Upper-level troughing will continue near and off the Pacific
Northwest coast with monsoonal moisture streaming northward across
much of the Intermountain West early to midweek. Daily monsoonal
thunderstorms are likely across the Southwest into the Great Basin,
but an upper-level trough is forecast to move into the Pacific
Northwest and northern Rockies mid to late week that will help
suppress moisture south and push it east late in the outlook period.
A deep upper-level trough is likely to weaken the ridge over the
Great Lakes as it moves into the Great Lakes and Northeast Day
4/Tuesday - Day 5/Wednesday.
Monsoonal moisture (PWAT values of 0.8-1.5") is pushing west and
north across the Great Basin, eastern California, and into portions
of the Inland Northwest and northern Rockies. On the
western/northern fringes of the deeper moisture, a mix of wet/dry
thunderstorms are likely. On Day 3/Monday, a 10% area for dry
thunderstorms was introduced for portions of northeast
California/vicinity and another 10% area was introduced on Day
4/Tuesday from far northern California into central/northeast
Oregon. Forecast PWAT values of 0.8-1" and surface dewpoints of
35-50F will likely to lead to at least pockets of wetting rain.
However, storm motions of 25-40 knots, probabilities of rainfall
exceeding 0.1" mostly less than 30%, and receptive fuels lead to
issuing the 10% areas. Additionally, deeper moisture will move out
of these areas by mid-week with dry/breezy conditions likely to
follow.
Hot, dry, and breezy conditions are likely across portions of
eastern Wyoming, western South Dakota, western Nebraska and eastern
Colorado Day 3/Monday through at least Day 5/Wednesday. Fuels will
rapidly cure amid these conditions leading to at least elevated
conditions through mid-week. While RH will recover overnight,
south-southeast winds are likely to remain breezy overnight.
Dry and breezy conditions may spread into northeast Minnesota Day
3/Monday - Day 4/Tuesday. Winds will be stronger on Day 3/Monday,
but RH will be higher, while lower RH spreads into the area on Day
4/Tuesday with slightly weaker winds. Critical conditions are not
expected, with locally elevated conditions more likely.
..Nauslar.. 07/11/2026
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