686
FNUS22 KWNS 081958
FWDDY2
DAY 2 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0258 PM CDT MON SEP 08 2025
VALID 091200Z - 101200Z
..WASHINGTON CASCADES AND COLUMBIA BASIN
AN UPPER-LEVEL TROUGH MOVING INTO THE NORTHWESTERN U.S. WILL SUPPORT
A CONDUCIVE THUNDERSTORM ENVIRONMENT THROUGH TONIGHT INTO THE EARLY
DAY 2 PERIOD, WITH THUNDERSTORMS LIKELY ONGOING BY TUESDAY MORNING.
LIMITED RAINFALL FROM THUNDERSTORMS COULD BRING ADDITIONAL IGNITIONS
TO PORTIONS OF THE COLUMBIA BASIN WHERE ERCS ARE STILL IN THE
80-90TH PERCENTILE RANGE. PRECIPITATION ASSOCIATED WITH
THUNDERSTORMS ACROSS THE WASHINGTON CASCADES WILL BE HIGHER IN
HEAVIER CORES BUT DENSER CANOPIES MAY INHIBIT MOISTURE PENETRATION
INTO UNDERSTORY FUELS, INVITING SOME IGNITION POTENTIAL FROM
LIGHTNING ON THE FRINGES OF HEAVIER RAIN CORES. OTHERWISE, PREVIOUS
FORECAST (SEE BELOW) REMAINS ON TRACK.
..WILLIAMS.. 09/08/2025
PREV DISCUSSION
/ISSUED 1239 AM CDT MON SEP 08 2025/
..SYNOPSIS
WITH THE UPPER-LEVEL TROUGH SHIFTING EASTWARD INTO MORE OF THE GREAT
BASIN, THE STRONGEST SURFACE WINDS WILL ALSO SHIFT FARTHER EAST ON
TUESDAY. THUNDERSTORMS WILL REMAIN POSSIBLE IN THE NORTHERN ROCKIES.
..GREAT BASIN
SOUTHERN INTO EAST-CENTRAL NEVADA AND WESTERN UTAH WILL LIKELY BE
UNDERNEATH AND INTENSIFYING MID-LEVEL JET. WINDS OF 15-20 MPH
(LOCALLY 25 MPH) WILL OVERLAP 15-20% RH. RH WILL BE SOMEWHAT
UNCERTAIN GIVEN THE POTENTIAL FOR MID/HIGH LEVEL CLOUDS. WITH RECENT
RAINFALL AND LESS RECEPTIVE FUELS, ONLY LOCALLY ELEVATED CONDITIONS
ARE EXPECTED.
..NORTHERN ROCKIES
SOME THUNDERSTORM ACTIVITY IS POSSIBLE EARLY TUESDAY IN IDAHO. THIS
ACTIVITY WILL SPREAD INTO MORE OF WESTERN MONTANA. ADDITIONAL
THUNDERSTORMS MAY DEVELOP BY AFTERNOON FARTHER EAST IN MONTANA AS
WELL. WITH THE CURRENT STATE OF FUELS SUGGESTING MARGINAL DRYNESS
AND HIGHER PWAT VALUES, LIMITED RISK FOR LIGHTNING IGNITIONS IS
CURRENTLY EXPECTED.
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
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