666
FNUS21 KWNS 211531
FWDDY1
DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
1030 AM CDT TUE JUL 21 2026
VALID 211700Z - 221200Z
MINOR MODIFICATIONS WERE MADE TO THE ISODRYT AREA BASED ON THE
LATEST OBSERVATIONS AND FORECAST GUIDANCE. PORTIONS OF THE ISODRYT
AREA MAY SEE MORE HIGH-BASED SHOWERS WITH LITTLE TO NO LIGHTNING,
WHILE A MIX OF WET/DRY STORMS REMAINS EXPECTED. ADDITIONALLY, A FEW
STORMS MAY LINGER OVERNIGHT IN OREGON. OTHERWISE, THE FORECAST IS ON
TRACK, AND PLEASE SEE THE PREVIOUS DISCUSSION FOR MORE DETAILS.
..NAUSLAR.. 07/21/2026
PREV DISCUSSION
/ISSUED 1245 AM CDT TUE JUL 21 2026/
..SYNOPSIS
..NORTHERN CALIFORNIA AND WEST/CENTRAL OREGON
ALONG THE NORTHWESTERN PERIPHERY OF A LARGE-SCALE RIDGE ENCOMPASSING
MUCH OF THE CENTRAL AND WESTERN CONUS, AMPLE MID-LEVEL MOISTURE WILL
BE IN PLACE ATOP A WARM AND DRY AIRMASS ACROSS PARTS OF NORTHERN CA
INTO OR. FORECAST SOUNDINGS DEPICT INVERTED-V PROFILES WITH WEAK
(ALBEIT SUFFICIENT) BUOYANCY FOR HIGH-BASED THUNDERSTORMS ACROSS THE
AREA DURING THE AFTERNOON AND EVENING HOURS. CLOUD COVER, SMOKE, AND
WARMER TEMPERATURES ALOFT WILL HELP LIMIT THUNDERSTORM
DEVELOPMENT/COVERAGE ACROSS THE ISODRYT AREA, BUT ISOLATED
THUNDERSTORMS REMAIN POSSIBLE. WHILE 0.8 TO 1.2 INCH PWATS MAY
PROMOTE A MIX OF WET/DRY STORMS, RELATIVELY FAST STORM MOTIONS AND
THE DRY BOUNDARY LAYER SHOULD LIMIT PRECIPITATION EFFICIENCY. AS A
RESULT, ISOLATED LIGHTNING-INDUCED IGNITIONS WILL BE POSSIBLE WITHIN
A VERY DRY FUELSCAPE.
..SOUTH CAROLINA
PROGRESSIVE UPPER-LEVEL TROUGHING WILL CONTINUE ACROSS THE
NORTHEASTERN U.S. AS A CLOSED LOW TRAVERSES NORTHERN ONTARIO,
SENDING A COLD FRONT THROUGH THE OHIO VALLEY. ENHANCED 850 MB
SOUTHWESTERLY FLOW AHEAD OF THE FRONT WILL ENCOURAGE GUSTY SURFACE
WINDS AMID MINIMUM RH VALUES OF 30-40% IN PORTIONS OF SOUTH
CAROLINA. LOCALLY ELEVATED FIRE WEATHER CONDITIONS ARE LIKELY, AS
ERCS GENERALLY RANGE FROM THE 80TH-95TH PERCENTILE ACROSS THIS AREA.
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page