Click for Day 1 FireWX Areal Outline Product
ZCZC SPCFWDDY1 ALL
FNUS21 KWNS 210802
DAY 1 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0302 AM CDT TUE APR 21 2009
VALID 211200Z - 221200Z
...NO CRITICAL AREAS...
...SYNOPSIS...
HIGHLY AMPLIFIED UPPER-LEVEL TROUGH WILL SLOWLY SHIFT EWD ACROSS THE
ERN CONUS. UPPER-LEVEL RIDGE OVER THE WRN CONUS WILL DEAMPLIFY AS A
WEAK SRN STREAM IMPULSE APPROACHES THE SRN CA COAST AND A SHORT WAVE
TROUGH DIGS ALONG THE BRITISH COLUMBIA COAST.
...INTERIOR AND ERN PORTIONS OF CNTRL FL...
A MID-LEVEL TROUGH AXIS /WELL-DEPICTED IN RECENT WATER VAPOR
IMAGERY/...WILL SHIFT SLOWLY EWD ACROSS CNTRL FL THIS MORNING.
UPSTREAM GPS PW VALUES OF 0.50 TO 0.75 IN WILL OVERSPREAD THE REGION
RESULTING IN SUBSTANTIAL SURFACE DRYING AS BOUNDARY LAYER MIXING
ENSUES. RH VALUES WILL FALL TO AROUND 30 PERCENT THIS AFTERNOON.
HOWEVER...LOW-LEVEL WLYS WILL WEAKEN THROUGH THE DAY.
THUS...SUSTAINED SURFACE SPEEDS SHOULD HOLD AROUND 10 MPH AS RH
BECOMES CRITICALLY LOW.
...N-CNTRL CA TO CNTRL ORE...
LATEST AVAILABLE GACC/FUELS INFORMATION INDICATE THAT FUELS SHOULD
GENERALLY REMAIN TOO MOIST TO SUPPORT POTENTIAL FOR A CRITICAL FIRE
AREA. NEVERTHELESS...ISOLATED DRY TSTMS MAY DEVELOP LATE THIS
AFTERNOON OVER HIGHER TERRAIN ALONG AND E OF THE CASCADE/KLAMATH
MTNS AS THE WRN RIDGE BREAKS DOWN. WELL-ABOVE NORMAL TEMPERATURES
WILL CONTRIBUTE TO INVERTED-V TYPE THERMODYNAMIC PROFILES. MID-LEVEL
MOISTENING AND DEGREE OF UPPER-LEVEL FORCING APPEARS
MODEST...SUGGESTING CONVECTIVE COVERAGE SHOULD BE SPARSE.
..GRAMS.. 04/21/2009
...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
Click for Day 2 FireWX Areal Outline Product
ZCZC SPCFWDDY2 ALL
FNUS22 KWNS 210926
DAY 2 FIRE WEATHER OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0426 AM CDT TUE APR 21 2009
VALID 221200Z - 231200Z
...NO CRITICAL AREAS...
...SYNOPSIS...
AN UPPER-LEVEL TROUGH OVER THE ERN CONUS WILL BECOME CENTERED OVER
THE MID-ATLANTIC AND NORTHEAST BY EARLY THU. UPSTREAM SHORT WAVE
TROUGH ALONG THE BRITISH COLUMBIA COAST WILL DIG INTO THE PACIFIC
NW. A WEAK SRN STREAM IMPULSE WILL GRADUALLY PROGRESS EWD ACROSS THE
SOUTHWEST. AT THE SURFACE...A RIDGE WILL REMAIN ANCHORED ACROSS THE
GULF OF MEXICO/FL. A LEE CYCLONE WILL FORM ALONG THE SRN HIGH
PLAINS.
...PORTIONS OF S-CNTRL/FAR S TX...
RH VALUES WILL DROP TO BETWEEN 12 AND 20 PERCENT AS TEMPERATURES
WARM INTO THE UPPER 80S TO MIDDLE 90S. SLY WINDS WILL STRENGTHEN AS
THE SURFACE PRESSURE GRADIENT TIGHTENS WITH A LEE CYCLONE FORMING
OVER NERN NM/TX PANHANDLE. HOWEVER...MODEL FORECASTS DIFFER WITH THE
MAGNITUDE OF THE WIND INCREASE WITH THE NAM NOTABLY STRONGER /FROM
20 TO 25 MPH/ THAN THE GFS AND ECMWF /AROUND 15 MPH/. GIVEN THIS
UNCERTAINTY WILL HOLD OFF ON A CRITICAL AREA ISSUANCE ATTM.
...FAR SERN AZ...
A BELT OF MODERATE MID-LEVEL SWLYS SHOULD SPREAD ACROSS THE MEXICAN
BORDER WED AFTERNOON. VERY DEEPLY MIXED THERMODYNAMIC PROFILES WILL
SUPPORT SUSTAINED SURFACE SPEEDS NEAR 20 MPH AT PEAK HEATING. THIS
WILL RESULT IN AN ENHANCED FIRE WEATHER THREAT GIVEN RH VALUES OF 5
TO 10 PERCENT.
...CNTRL/SRN FL...
LOW RH /FROM 25 TO 35 PERCENT/ WILL PERVADE ACROSS MUCH OF THE
PENINSULA OUTSIDE OF THE IMMEDIATE COASTS. THE PRESENCE OF A
LOW-LEVEL RIDGE AXIS SHOULD LEAD TO WEAK WINDS /AOB 10 MPH/...AND
MITIGATE A CRITICAL THREAT.
..GRAMS.. 04/21/2009
...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...