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 230554
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1254 AM CDT Fri May 23 2025
Valid 231200Z - 241200Z
...CRITICAL FIRE WEATHER AREA FOR EAST-CENTRAL ARIZONA INTO
WEST-CENTRAL NEW MEXICO...
...Synopsis...
Southwesterly flow aloft will increase ahead of an approaching wave
across southwestern US today, bringing an increase in southwest
surface winds. A very dry air mass and deeply mixed profiles will
support relative humidity reductions to around 10-15 percent (as low
as 5-10 percent) and sustained winds 15-20 mph across much Arizona
into New Mexico. Fuels along the Mogollon Rim in Arizona into
western New Mexico are receptive to fire spread, with ERCs near the
75th-90th percentile. As such, these are the areas where Critical
highlights have been maintained, with broader Elevated highlights
across much of eastern Arizona into western New Mexico. Elevated
conditions will also extend into eastern Utah and western Colorado.
..Thornton.. 05/23/2025
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U.S. Day 2 Fire Weather Outlook
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 230635
Day 2 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0135 AM CDT Fri May 23 2025
Valid 241200Z - 251200Z
...Synopsis...
A mid-level wave will shift across the Southwest on Saturday.
Enhanced mid-level flow will largely pass overnight D1/Friday into
D2/Saturday, with relaxing pressure gradients through the day.
Though afternoon relative humidity will remain low (around 10
percent), this relaxing gradient will keep winds largely below
Critical values. In addition, an increase in mid-level cloud cover
is expected which may limit mixing. In more favored downslope
regions, locally stronger winds will be possible and support periods
of localized Critical fire weather. Overall, the broad Elevated
delineation was maintained where highest confidence in sustained
Elevated conditions were expected across eastern Arizona into
southeastern Utah and across south-central/western New Mexico.
..Thornton.. 05/23/2025
U.S. Day 3-8 Fire Weather Outlook
ZCZC SPCFWDD38 ALL
FNUS28 KWNS 222155
Day 3-8 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0455 PM CDT Thu May 22 2025
Valid 241200Z - 301200Z
An upper-level trough will support breezy and dry conditions across
portions of the Southwest through Day 4/Sunday, promoting an
Elevated to locally Critical fire weather threat with dry fuels in
place. An upper-level trough will bring cooler temperatures and some
precipitation to the Pacific Northwest and Northern Rockies for the
Day 5-6/Monday-Tuesday time frame. An overall ridging pattern sets
up over the Western U.S. by the middle of next week supporting above
normal temperatures but light winds for much of the region. Residual
mid-level moisture under the ridge combined with daytime
heating/instability should support convection/isolated thunderstorms
in higher terrain across the Central and Northern Rockies Day
6-8/Tuesday-Thursday, although higher terrain fuels should remain
largely unavailable for significant fire spread, limiting ignition
efficiency.
...Southwest...
Primary fire weather concern remains across the Southwest U.S.
through at least Day 4/Sunday. An upper-level trough with associated
accelerated mid-level southwest flow will bring another period of
dry and breezy conditions to portions of the Southwest on Day
3/Saturday. Given the rather diffuse and broad mid-level flow, a 40
percent Critical probability was maintained for portions of the
Upper Colorado River Basin, Mogollon Rim and southwestern New
Mexico. The fire weather threat shifts farther south and east into
southern New Mexico and far West Texas by Day 4/Sunday as the trough
ejects into the Great Plains by Day 5/Monday.
..Williams.. 05/22/2025
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