745
FNUS22 KWNS 200708
FWDDY2
DAY 2 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0208 AM CDT FRI JUN 20 2025
VALID 211200Z - 221200Z
...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF THE EASTERN GREAT
BASIN...
..SYNOPSIS
ANOTHER DAY OF WIDESPREAD FIRE WEATHER CONCERNS IS EXPECTED ACROSS
THE EASTERN GREAT BASIN SATURDAY AFTERNOON. THE PRIMARY UPPER-LEVEL
LOW, CURRENTLY OFF THE PACIFIC NORTHWEST COAST, IS FORECAST TO SHIFT
EAST INTO THE NORTHERN GREAT BASIN THROUGH LATE SATURDAY. AS THIS
OCCURS, A BELT OF STRONG LOW TO MID-LEVEL FLOW WILL OVERSPREAD MUCH
OF THE GREAT BASIN AHEAD OF A SOUTHEASTWARD MOVING COLD FRONT. DRY,
WINDY CONDITIONS AHEAD OF THE FRONT WILL PROMOTE WIDESPREAD FIRE
WEATHER CONCERNS OVER A REGION WITH ONGOING ACTIVE FIRES.
..EASTERN GREAT BASIN
EARLY-MORNING SURFACE OBSERVATIONS SHOW A VERY DRY AIR MASS IN PLACE
ACROSS MUCH OF THE SOUTHWEST/GREAT BASIN (OVERNIGHT RH VALUES REMAIN
IN THE SINGLE DIGITS TO LOW TEENS). CONTINUED DRY/WINDY CONDITIONS
TODAY WILL MAINTAIN THIS DRY AIR MASS THROUGH SATURDAY. A
COMBINATION OF VERY DRY LOW-LEVEL CONDITIONS AND ABUNDANT DAYTIME
HEATING WILL PROMOTE DEEP BOUNDARY-LAYER MIXING ACROSS THE REGION,
WHICH WILL FACILITATE DOWNWARD TRANSPORT OF 30-40 KNOT MID-LEVEL
FLOW. LATEST HIGH-RES ENSEMBLE GUIDANCE CONTINUES TO SHOW A STRONG
SIGNAL FOR 20-25 MPH WINDS FROM SOUTHERN NV/NORTHERN AZ NORTHWARD
INTO SOUTHERN WY. WITH AFTERNOON RH MINIMUMS IN THE SINGLE DIGITS,
CRITICAL CONDITIONS APPEAR LIKELY. WINDS GUSTING UP TO 35-45 MPH
WILL SUPPORT PERIODS OF EXTREMELY CRITICAL CONDITIONS. WINDS ARE
FORECAST TO SHIFT FROM SOUTHWESTERLY TO NORTHWESTERLY WITH THE
PASSAGE OF THE COLD FRONT DURING THE LATE EVENING/OVERNIGHT HOURS,
BUT DRY POST-FRONTAL CONDITIONS MAY SUPPORT ADDITIONAL FIRE SPREAD.
..CA CENTRAL VALLEY
NORTHERLY WINDS ARE FORECAST TO INCREASE TO 15-20 MPH THROUGH THE
DAY WITHIN THE CENTRAL VALLEY. SOME DEGREE OF DOWNSLOPE WARMING WILL
PROMOTE RH REDUCTIONS INTO THE TEENS TO LOW 20S BY LATE AFTERNOON.
WITH DRY GRASSES ALREADY IN PLACE, THE DRY/WINDY CONDITIONS WILL
LIKELY POSE A FIRE WEATHER CONCERN.
..HIGH PLAINS
WEST TO SOUTHWESTERLY WINDS ARE FORECAST TO INCREASE TO 15-25 MPH
BEHIND A SURFACE TROUGH/DRYLINE DRAPED ALONG THE HIGH PLAINS. MOST
FORECAST GUIDANCE SUGGESTS THAT SOMEWHAT WIDESPREAD ELEVATED FIRE
WEATHER CONDITIONS WILL EMERGE WITHIN THIS REGIME FROM NORTHEAST NM
INTO EASTERN CO, SOUTHEAST WY, AND ADJACENT PORTIONS OF WESTERN SD,
NE, AND KS. DESPITE THE POTENTIAL FOR WIDESPREAD DRY/WINDY
CONDITIONS, RECENT RAINFALL HAS MITIGATE FUEL STATUS FOR THE TIME
BEING AND HAS PROMOTED WIDESPREAD GREEN UP OF MOST GRASSES. BECAUSE
OF THIS HIGHLIGHTS WERE WITHHELD, THOUGH FUEL TRENDS WILL CONTINUE
TO BE MONITORED.
..MOORE.. 06/20/2025
..PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT
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