881
FNUS21 KWNS 181645
FWDDY1
DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1144 AM CDT WED JUN 18 2025
VALID 181700Z - 191200Z
AN UPPER-LEVEL SHORTWAVE TROUGH WILL PROMOTE DRY DOWNSLOPE WESTERLY
FLOW INTO MUCH OF THE COLUMBIA BASIN TODAY. DEEPER PACIFIC MOISTURE
INFILTRATING THROUGH THE COLUMBIA RIVER GORGE WILL MITIGATE FIRE
WEATHER CONCERNS ALONG THE OREGON/WASHINGTON BORDER, BUT ELEVATED
HIGHLIGHTS WERE LARGELY MAINTAINED FOR MUCH OF THE COLUMBIA BASIN
WITH DRY FUELS IN PLACE.
..WILLIAMS.. 06/18/2025
PREV DISCUSSION
/ISSUED 0150 AM CDT WED JUN 18 2025/
..SYNOPSIS
WITHIN THE BASE OF A DEEP MIDLEVEL LOW OFF OF BRITISH COLUMBIA, A
SHORTWAVE TROUGH AND RELATED MIDLEVEL WESTERLY SPEED MAXIMUM WILL
OVERSPREAD THE PACIFIC NORTHWEST. AS A RESULT, DRY/BREEZY DOWNSLOPE
FLOW WILL DEVELOP IN THE COLUMBIA BASIN DURING THE AFTERNOON. HERE,
AROUND 15 MPH SUSTAINED WESTERLY SURFACE WINDS (HIGHER IN THE
CASCADE GAPS) AND 20-25 PERCENT RH WILL FAVOR ELEVATED TO LOCALLY
CRITICAL FIRE-WEATHER CONDITIONS OVER DRY FUELS.
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
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