134
FNUS21 KWNS 101605
FWDDY1

Day 1 Fire Weather Outlook
NWS Storm Prediction Center Norman OK
1105 AM CDT Thu Sep 10 2026

Valid 101700Z - 111200Z

The forecast remains on track for elevated fire weather conditions
across eastern Idaho, southwestern Montana, and portions of the
northern Plains today. Poor overnight humidity recoveries occurred
across much of Wyoming and southern Montana, contributing to
widespread critical RH values as depicted by 15z surface
observations. Deep vertical mixing will allow sustained surface
winds to accelerate to 15-20 mph (gusts up to 30 mph) this afternoon
amid receptive fuels, maintaining a broader fire weather threat.
Please see the previous discussion for details.

..Elizalde-Garcia.. 09/10/2026

.PREV DISCUSSION... /ISSUED 0101 AM CDT Thu Sep 10 2026/

...Synopsis...
An upper-level trough and attendant increasing westerly flow aloft
will push southward into the northwestern U.S. today. At the
surface, broad troughing across the Canadian Prairies will stretch
towards the Northern Rockies, where an increasing surface pressure
gradient will bring stronger westerly winds to much of the
Northwest, northern Rockies and northern High Plains. Although the
elevated winds will span a large geographic area, fuels remain most
receptive across portions of the northern Rockies and northern High
Plains where Elevated Highlights remain.

...Eastern Idaho, southern Montana and portions of Wyoming...
Low-level winds will accelerate across much of the northwestern U.S.
and northern Plains in response to an expanding surface trough that
stretches from the Canadian Prairies region into the northern High
Plains/Northern Rockies. A dry air mass remains in place across much
of the Intermountain West where afternoon RH is likely to fall into
the 10-15% range in lower elevations this afternoon, following poor
recoveries in some locations this morning. Fire weather concerns
will be focused across eastern ID, portions of WY, southern MT and
far southwestern ND where fuels remain most receptive. The
overlapping west winds of 15-20 mph and low RH amid dry fuels will
support elevated fire weather conditions for several hours from late
morning through the afternoon.

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

$$