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Day 1 Fire Weather Outlook  
NWS Storm Prediction Center Norman OK
0153 AM CDT Tue Sep 13 2022

Valid 131200Z - 141200Z

...Synopsis...
A large-scale ridge will move eastward from the Rockies toward the
MS Valley, while broad midlevel troughing and modest
west-southwesterly flow aloft enco*pass the western CONUS. Within
the broad west-southwesterly flow, an embedded shortwave trough will
emerge over the central Rockies, resulting in the deepening of a
surface low in the lee of the northern Rockies. 

...North-Central High Plains...
In response to the deepening surface low in the lee of the northern
Rockies, breezy southerly surface winds near 15 mph will develop
across much of the northern and central High Plains. Over southeast
MT through eastern WY, downslope warming/drying will result in 10-15
percent RH amid the breezy surface winds. Given a lack of recent
accumulating rainfall over this area and modestly receptive fuels,
elevated fire-weather conditions will be possible during the
afternoon/early evening hours. Elevated conditions may also occur
southward along the I-25 corridor and plains of northern CO, though
recent rainfall casts uncertainty on receptiveness of fuels --
precluding highlights there.

Farther north over northeast MT into western ND, breezy
east-southeasterly surface winds are also expected. However, a
post-frontal airmass over this area should temper any substantial RH
reductions -- generally limiting the overlap of breezy winds and low
RH.

...Northern Sierra and Southern Cascades...
The west-southwesterly midlevel flow perpendicular to the higher
terrain could result in 15-20 percent minimum RH in the immediate
lee of the northern Sierra and southern Cascades. These dry
conditions, coupled with 15 mph sustained west-southwesterly surface
winds could lead to locally elevated conditions.

..Weinman.. 09/13/2022

...Please see www.spc.noaa.gov/fire for graphic product...