251
FNUS21 KWNS 171639
FWDDY1
DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1138 AM CDT FRI JUL 17 2026
VALID 171700Z - 181200Z
NO SIGNIFICANT CHANGES TO EXISTING ELEVATED HIGHLIGHTS WERE NEEDED.
DRY AND BREEZY SURFACE CONDITIONS BOLSTERED BY A MID-LEVEL LOW AND
ASSOCIATED STRONGER FLOW ALOFT ARE EXPECTED ACROSS THE COLUMBIA
BASIN AND NORTHEASTERN CA, SOUTHERN OR AND NORTHWESTERN NV. RH AS
LOW AS 10% PERCENT CAN BE EXPECTED, PARTICULARLY IN THE LEE OF THE
CASCADES WHERE DOWNSLOPE DRYING EFFECTS WILL BE MORE PRONOUNCED.
WEST TO SOUTHWESTERLY WINDS OF 10-15 MPH WILL EVOLVE THIS AFTERNOON
AS A WELL-MIXED AND DRY BOUNDARY LAYER DEVELOPS IN THE WAKE OF
EXITING MONSOON MOISTURE. THE ELEVATED FIRE WEATHER CONDITIONS COULD
IMPACT NASCENT WILDFIRES IN OR.
..WILLIAMS.. 07/17/2026
PREV DISCUSSION
/ISSUED 0149 AM CDT FRI JUL 17 2026/
..SYNOPSIS
A MIDLEVEL LOW WILL MOVE NORTHWARD ALONG THE PACIFIC NORTHWEST COAST
TODAY. BETWEEN THIS FEATURE AND AN EXPANSIVE UPPER RIDGE OVER THE
ROCKIES AND GREAT BASIN, A BELT OF ENHANCED SOUTH-SOUTHWESTERLY
LOW/MID-LEVEL FLOW WILL OVERSPREAD THE NORTHERN GREAT BASIN AND
NORTHWEST. DOWNSLOPE-ENHANCED WARMING/DRYING IN THE LEE OF THE
NORTHERN CASCADES AND COLUMBIA BASIN WILL RESULT IN DEEP
BOUNDARY-LAYER MIXING (10-15 PERCENT RH). THESE WARM/DRY CONDITIONS
COMBINED WITH AROUND 15 MPH SUSTAINED SOUTHWESTERLY WINDS ATOP
RECEPTIVE FUELS WILL YIELD ELEVATED FIRE-WEATHER CONDITIONS DURING
THE AFTERNOON.
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
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