669
FNUS22 KWNS 190710
FWDDY2
DAY 2 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0209 AM CDT THU JUN 19 2025
VALID 201200Z - 211200Z
...CRITICAL FIRE WEATHER AREA FOR MUCH OF THE GREAT BASIN INTO THE
SOUTHWEST...
..SYNOPSIS
A ROBUST MIDLEVEL LOW WILL ADVANCE EASTWARD ACROSS THE NORTHWEST
DURING THE DAY, WHILE A SWATH OF STRONG DEEP-LAYER WESTERLY FLOW
OVERSPREADS MUCH OF THE WESTERN CONUS. IN RESPONSE, SURFACE LOW
PRESSURE WILL DEEPEN OVER THE NORTHERN GREAT BASIN, PROMOTING A
TIGHTENING PRESSURE GRADIENT ACROSS THE GREAT BASIN INTO THE
SOUTHWEST. THIS LARGE-SCALE PATTERN WILL SUPPORT WIDESPREAD CRITICAL
FIRE-WEATHER CONDITIONS ACROSS THE GREAT BASIN INTO THE SOUTHWEST.
..GREAT BASIN INTO THE SOUTHWEST
STRONG DIURNAL HEATING AMID A DRY ANTECEDENT AIR MASS WILL SUPPORT
ANOTHER DAY OF WIDESPREAD SINGLE-DIGIT RH ACROSS THE REGION. AT THE
SAME TIME, DEEP BOUNDARY-LAYER MIXING INTO THE STRONG FLOW ALOFT,
COMBINED WITH THE TIGHTENING PRESSURE GRADIENT, WILL YIELD AN
EXPANSIVE AREA OF 20-30 MPH SUSTAINED SOUTHWESTERLY SURFACE WINDS.
GIVEN INCREASINGLY DRY FUELS ACROSS MUCH OF THE GREAT BASIN INTO THE
SOUTHWEST, WIDESPREAD CRITICAL FIRE-WEATHER CONDITIONS ARE EXPECTED,
WITH LOCALIZED EXTREMELY CRITICAL CONDITIONS POSSIBLE OVER
TERRAIN-FAVORED AREAS.
..SOUTHERN CA INTO THE SAN JOAQUIN VALLEY
DEEP-LAYER WEST-NORTHWESTERLY FLOW ON THE UPSTREAM-SIDE OF THE
MIDLEVEL LOW WILL OVERSPREAD CENTRAL AND SOUTHERN CA, WHERE THE
TIGHT REGIONAL PRESSURE GRADIENT WILL BE IN PLACE. THIS WILL PROMOTE
BREEZY/GUSTY SURFACE WINDS PRIMARILY OVER THE INTERIOR MOUNTAINS AND
VALLEY -- WHERE 15-20 PERCENT RH IS EXPECTED. THESE DRY/BREEZY
CONDITIONS WILL FAVOR ELEVATED FIRE-WEATHER CONDITIONS WHERE FUELS
ARE RECEPTIVE TO WILDFIRE SPREAD.
..WEINMAN.. 06/19/2025
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
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