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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 241530
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1030 AM CDT Fri Jul 24 2026
Valid 241700Z - 251200Z
...CRITICAL FIRE WEATHER AREA FOR SOUTH-CENTRAL/SOUTHEAST
OREGON...NORTHEAST CALIFORNIA...NORTHWEST NEVADA...AND FAR SOUTHWEST
IDAHO...
The Elevated and Critical areas were expanded slightly in southern
Oregon, northeast California, northwest Nevada, and southwest Idaho
based on the latest observations and forecast guidance. While RH
recovery was mostly moderate to good across the Elevated area, RH is
already dropping and will continue throughout day leading to long
duration elevated/critical conditions as stronger winds develop by
the afternoon. Elevated and perhaps locally critical conditions will
continue overnight across southeast Oregon, northwest Nevada,
southwest Idaho, and far northeast California.
..Nauslar.. 07/24/2026
.PREV DISCUSSION... /ISSUED 0156 AM CDT Fri Jul 24 2026/
...Synopsis...
As an upper-level trough approaches the Pacific Northwest coast
today, a series of disturbances cresting the upper-level ridge over
the West will result in increased flow aloft from the Pacific
Northwest into the northern Plains. Given the hot and dry airmass in
place over much of the region, deep boundary-layer mixing will
promote gusty surface winds raising fire-weather concerns in an
increasingly favorable fuelscape.
...Northeastern California...Northwestern
Nevada...South-Central/Southeastern Oregon...
Very hot and dry conditions will result in multiple hours of
single-digit RH values across the region. With enhanced
southwesterly flow aloft brushing the area, deep vertical mixing
will result in west-southwesterly surface winds approaching 20 mph.
Given the dry fuels (ERC values exceeding the 80th percentile) and
recent lightning events with limited rainfall, critical fire weather
conditions are likely.
...Northern Montana...
Very strong winds aloft and a deep, well-mixed boundary layer will
result in sustained afternoon westerly surface winds approaching 20
mph in the presence of RH values dipping just below 15%. These
elevated conditions will cure the fuels for the coming days.
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U.S. Day 2 Fire Weather Outlook
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 241929
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0229 PM CDT Fri Jul 24 2026
Valid 251200Z - 261200Z
...CRITICAL FIRE WEATHER AREA FOR THE INLAND NORTHWEST INTO THE
NORTHWEST GREAT BASIN AND NORTHWEST MONTANA...
Minor modifications were made to the outlook based on the latest
forecast guidance. Isolated to scattered mixed wet/dry thunderstorms
may develop into western South Dakota and northeast Wyoming.
However, efforts were made to exclude areas that have recently
received wetting rain, will likely receive wetting rain, or will
have multiple consecutive days of wetter thunderstorms. Regardless,
lightning ignitions remain possible if not likely in/around the
IsoDryT area, with gusty outflow winds likely as well. Additionally,
locally extremely critical conditions remain possible in wind prone
areas and where deep boundary layer mixing allows for stronger winds
and drier air aloft to surface across the Critical area.
..Nauslar.. 07/24/2026
.PREV DISCUSSION... /ISSUED 0157 AM CDT Fri Jul 24 2026/
...Synopsis...
Continued upper-level ridging over the West on Saturday with
enhanced flow over the ridge will result in an expansive area of
fire-weather concerns, extending from northern California/Nevada
into eastern Oregon/Washington and northern Idaho/Montana.
...Critical Fire Weather Conditions...
Successive days with hot, dry, and breezy conditions warrant
critical fire-weather highlights in a favorable fuelscape,
characterized by ERC values largely ranging from the 80th-95th
percentiles across the region. Deep, well-mixed boundary layers are
likely to yield critical RH values (<15%) and sustained afternoon
wind speeds exceeding 20 mph. The most favorable meteorological
conditions are likely across southeastern Oregon.
...Dry Thunderstorm Potential...
While PW values around one inch may favor wetting rains from
thunderstorms across central/eastern Montana, very hot and deep
boundary layers will promote precipitation evaporation. When
considering relative fast storm motions (25-30 mph), a mix of wet
and dry thunderstorms is possible across the region.
U.S. Day 3-8 Fire Weather Outlook
ZCZC SPCFWDD38 ALL
FNUS28 KWNS 232203
Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0503 PM CDT Thu Jul 23 2026
Valid 251200Z - 311200Z
Upper-level troughing will continue across the northwestern US
through early next week with mid-level shortwaves occasionally
rotating through the southwesterly flow aloft. Hot, dry, and breezy
conditions will continue into early next week across much of the
Inland Northwest, northern Great Basin, northern Rockies, and
northern Plains. The Four Corners high will likely slowly shift east
over the southern High Plains late this weekend and early next week,
with daily monsoonal thunderstorms also likely to continue across
much of the Four Corners region.
...Northwestern US...
Elevated to critical fire weather conditions will overspread the
Inland Northwest, northwest Great Basin, and much of the northern
Rockies onto the northern High Plains Day 3/Saturday. West-southwest
winds will increase amid strengthening winds aloft and an onshore
pressure gradient. RH will decrease as drier air continues to filter
into the region leading to long duration elevated/critical
conditions with possible locally extremely critical conditions
developing within the 70% area. Isolated to scattered mixed wet/dry
thunderstorms are likely to develop across portions of
central/eastern Montana on Day 3/Saturday as well.
Dry and windy conditions will continue across the same areas on Day
4/Sunday, while likely expanding farther onto the northern Plains. A
70% area was introduced extending northward from the Sierra Front
into southern Oregon/vicinity, with another 70% area in northern
Montana. Some forecast guidance indicates that critical conditions
will develop again in the Columbia Basin, but only an upgrade to 40%
was done at this time. Isolated mixed wet/dry thunderstorms are
possible in southeast Montana/vicinity on Day 4/Sunday and will be
monitored for potential DryT probabilities going forward.
Dry and breezy conditions will continue on Day 5/Monday across
portions of the northern Great Basin/vicinity and possibly across
the Inland Northwest and into the northern Rockies. These dry and
breezy conditions may continue into Day 6/Tuesday, but there is too
much forecast uncertainty regarding the timing of the upper-level
ridge building back over the West with stronger southwest flow
retreating to the northwest.
Fuels will continue to cure across the northwestern US due to
consecutive days of hot, dry, and breezy conditions, which will
allow more areas to have receptive fuels and thus be included in
fire risk areas going forward. This period represents a critical
fire weather pattern as hot, dry, and windy conditions will follow
lightning. Growth on existing fires and new emerging fires is
expected.
...Southern Plains...
Hot, dry, and breezy conditions are likely early to mid next week
across the Texas Panhandle and western Oklahoma. A 40% area was
introduced to reflect this with an expansion and additional areas
likely needed in subsequent outlooks as fuels rapidly cure.
..Nauslar.. 07/23/2026
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