542
FNUS21 KWNS 160659
FWDDY1
DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0158 AM CDT MON JUN 16 2025
VALID 161200Z - 171200Z
...CRITICAL FIRE WEATHER AREA FOR PARTS OF SOUTHERN
NEVADA...SOUTHWESTERN UTAH...AND FAR NORTHWESTERN ARIZONA...
..SYNOPSIS
A MIDLEVEL TROUGH WILL ADVANCE EASTWARD FROM THE WEST COAST ACROSS
PARTS OF THE GREAT BASIN/INTERMOUNTAIN WEST TODAY. WITHIN THE BASE
OF THE TROUGH, MODERATE DEEP-LAYER WESTERLY FLOW WILL OVERSPREAD THE
GREAT BASIN, WHILE A WEAK SURFACE LOW/TROUGH EVOLVES OVER THE LOWER
CO RIVER VALLEY.
..SOUTHERN NV INTO SOUTHWEST UT AND FAR NORTHWEST AZ
ALONG THE SOUTHERN PERIPHERY OF MID/HIGH-LEVEL CLOUDS PRECEDING THE
MIDLEVEL TROUGH, STRONG DIURNAL HEATING OF A WARM/DRY ANTECEDENT AIR
MASS WILL RESULT IN A DEEPLY MIXED BOUNDARY LAYER ACROSS THE
SOUTHERN GREAT BASIN. THE DEEP MIXING INTO THE ENHANCED FLOW ALOFT,
ALONG WITH A TIGHTENING PRESSURE GRADIENT PERIPHERAL TO THE SURFACE
LOW/TROUGH, WILL YIELD SINGLE-DIGIT RH AND 20-25 MPH SUSTAINED
SOUTHWESTERLY SURFACE WINDS (WITH HIGHER GUSTS) ACROSS SOUTHERN NV,
SOUTHWEST UT, AND FAR NORTHWEST AZ. GIVEN INCREASINGLY DRY FUELS
ACROSS THE REGION, CRITICAL FIRE-WEATHER CONDITIONS ARE EXPECTED.
FARTHER NORTH, MODEST WESTERLY FLOW ALOFT ACROSS THE CASCADES WILL
CONTRIBUTE TO LOCALLY DRY/BREEZY DOWNSLOPE FLOW INTO THE COLUMBIA
BASIN, WHERE ELEVATED FIRE-WEATHER CONDITIONS ARE FORECAST.
..WEINMAN.. 06/16/2025
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
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