SPC Day 1 Fire Weather Outlook
[html]SPC Day 1 Fire Weather Outlook
Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
0200 AM CDT Tue Apr 19 2022
Valid 191200Z - 201200Z
...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE SOUTHWEST INTO THE
SOUTHERN HIGH PLAINS...
...CRITICAL FIRE WEATHER AREA FOR EASTERN WYOMING INTO FAR WESTERN
NEBRASKA...
...Synopsis...
A broad large-scale trough and enhanced deep-layer westerly flow
will overspread the western CONUS, favoring surface lee troughing
over the northern and central High Plains. Farther east, a dry
post-frontal airmass will be in place across the Southeast and
Florida Peninsula.
...Southwest into the southern High Plains...
As the enhanced deep-layer westerly flow overspreads the Southwest
and southern High Plains, efficient diurnal heating/mixing of a dry
antecedent airmass will result in widespread 10-15 percent minimum
RH. These dry boundary-layer conditions, co*bined with sustained
westerly surface winds of 20-30 mph atop dry/receptive fuels will
support critical fire-weather conditions.
...Eastern Wyoming into far western Nebraska...
Downslope warming/drying co*bined with diurnal heating will yield 15
percent RH during the afternoon. At the same time, the tight surface
pressure gradient peripheral to the deepening lee trough will favor
20-25 mph sustained westerly surface winds. Therefore, Critical
highlights are in place where dry fuels exist.
...Florida Peninsula...
A dry post-frontal airmass will enco*pass the Florida Peninsula,
where diurnal heating will result in 25-35 percent minimum RH over
the central and western portions of the peninsula. Northerly surface
winds near 10 mph are expected to overlap the critically low RH for
a few hours, warranting Elevated highlights.
...Northern Montana...
Sustained westerly surface winds near 30 mph (with higher gusts) are
expected in the lee of the higher terrain across northern Montana.
While strong downslope flow could contribute to 25 percent RH amid
the strong/gusty winds, generally unreceptive fuels should mitigate
the fire-weather risk.
..Weinman.. 04/19/2022
...Please see www.spc.noaa.gov/fire for graphic product...
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Source: SPC Day 1 Fire Weather Outlook (http://ht**://www.spc.noaa.gov/products/fire_wx/fwdy1.html)