Click for Day 1 FireWX Areal Outline Product
ZCZC SPCFWDDY1 ALL FNUS21 KWNS 130803 DAY 1 FIRE WEATHER OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 0303 AM CDT MON OCT 13 2008 VALID 131200Z - 141200Z ...CRITICAL FIRE WEATHER AREA FOR SRN CA COASTAL AREA... ...CRITICAL FIRE WEATHER AREA FOR LOWER CO RIVER VALLEY... ...SYNOPSIS... ELONGATED UPPER-LEVEL TROUGH FROM THE NRN PLAINS TO THE SOUTHWEST WILL FRACTURE INTO TWO DISTINCT SHORT WAVES. ONE WILL ACCELERATE E/NEWD ALONG THE CANADIAN BORDER INTO ONTARIO...WHILE THE OTHER REMAINS QUASI-STATIONARY OVER THE FOUR CORNERS. UPSTREAM RIDGE OVER THE PACIFIC NW WILL WEAKEN AS A LOW-AMPLITUDE IMPULSE OVER THE NERN PACIFIC RAPIDLY PROGRESSES INLAND ACROSS SWRN CANADA. AT THE SURFACE...HIGH PRESSURE WILL BE ANCHORED OVER THE CNTRL GREAT BASIN...WHILE A TROUGH HOLDS ALONG THE CA COAST. ...CRITICAL FIRE WEATHER AREA - SRN CA COASTAL AREA... PRIMARY CONDITIONS: SANTA ANA WINDS / LOW RH / MODERATE TO SEVERE DROUGHT A SIGNIFICANT OFFSHORE WIND EVENT IS EXPECTED TODAY WITH WIDESPREAD CRITICAL AND LOCALIZED EXTREME CONDITIONS. ASOS AND MESONET OBSERVATIONS CONFIRM GUSTY OFFSHORE WINDS HAVE AIDED IN POOR RH RECOVERY ALONG AND ADJACENT TO THE COASTAL MTNS. THESE WINDS SHOULD GRADUALLY INCREASE FURTHER THIS MORNING PRIOR TO LEVELING OFF FOR A TIME THIS AFTERNOON. IN THE EARLY EVENING...THE PEAK OF THE EVENT SHOULD COMMENCE AS STRONG 700-500 MB FLOW WILL BE OPTIMALLY ALIGNED WITH THE LOWER-LEVEL WIND PROFILE. SUSTAINED SURFACE WINDS FROM 25 TO 40 MPH WILL BE COMMON...WITH LOCALIZED GUSTS OF 60-70 MPH IN FAVORED CANYONS/PASSES N/E OF THE LA BASIN. CONTINUED DOWNSLOPE WARMING/DRYING WILL SUPPORT LONG DURATIONS OF LOW RH /AOB 15 PERCENT/ WITH MINIMAL RH RECOVERY. ...CRITICAL FIRE WEATHER AREA - LOWER CO RIVER VALLEY... PRIMARY CONDITIONS: STRONG WINDS / LOW RH / ABNORMAL DRYNESS A RELATIVELY TIGHT SURFACE PRESSURE GRADIENT WILL LEAD TO STRONG NLY WINDS DEVELOPING LATE THIS MORNING THROUGH THE AFTERNOON. SUSTAINED SPEEDS WILL REACH 20 TO 25 MPH. TEMPERATURES WARMING INTO THE 70S WILL RESULT IN CRITICALLY LOW RH NEAR 10 PERCENT. ...SACRAMENTO VALLEY VICINITY OF NRN CA... GUSTY N/NELY WINDS HAVE BECOME MORE ISOLATED THIS MORNING AND LED TO IMPROVED RH RECOVERY IN MOST LOCALES. ONE EXCEPTION IS ALONG THE HILLS/MTNS SURROUNDING THE W SIDE OF THE VALLEY. STILL...THE INFLUENCE OF MID-LEVEL RIDGING WILL WEAKEN THE DEEP-LAYER KINEMATIC PROFILE TODAY...WHILE STRENGTHENING OF THE SUBSIDENCE INVERSION WILL LIMIT THE DEPTH OF THE MIXED BOUNDARY LAYER. ALTHOUGH LOW RH WILL PERSIST...SUSTAINED WINDS WILL LARGELY REMAIN BELOW 20 MPH LENDING TO A MORE MARGINAL THREAT COMPARED TO THE PREVIOUS THREE DAYS. ..GRAMS.. 10/13/2008 ...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...
Click for Day 2 FireWX Areal Outline Product
ZCZC SPCFWDDY2 ALL FNUS22 KWNS 130908 DAY 2 FIRE WEATHER OUTLOOK NWS STORM PREDICTION CENTER NORMAN OK 0408 AM CDT MON OCT 13 2008 VALID 141200Z - 151200Z ...CRITICAL FIRE WEATHER AREA FOR SRN CA COASTAL AREA... ...SYNOPSIS... A MID-LEVEL SHORT WAVE TROUGH CENTERED OVER THE FOUR CORNERS WILL BEGIN TO ACCELERATE EWD AS AN IMPULSE OVER THE NERN PACIFIC ENTERS THE PACIFIC NW. SURFACE HIGH OVER THE GREAT BASIN SHOULD WEAKEN AS IT SHIFTS EWD TO THE NRN/CNTRL ROCKIES. ...CRITICAL FIRE WEATHER AREA - SRN CA COASTAL AREA... PRIMARY CONDITIONS: STRONG OFFSHORE WINDS / LONG DURATION LOW RH / MODERATE TO SEVERE DROUGHT CRITICAL CONDITIONS SHOULD BE ONGOING AT 12Z/TUE ALONG HIGHER TERRAIN AND ADJACENT VALLEYS/CANYONS WITH SUSTAINED OFFSHORE WINDS OF 20 TO 35 MPH AND MINIMAL TO NO RH RECOVERY. MODEL FORECASTS ARE CONSISTENT WITH DEPICTING DIMINISHING DEEP-LAYER KINEMATIC SUPPORT THROUGH THE DAY...ALONG WITH A MORE RELAXED SURFACE PRESSURE GRADIENT TUE EVENING INTO WED MORNING. THUS...OFFSHORE FLOW SHOULD BE SUBSTANTIALLY WEAKER BY LATE IN THE PERIOD. WIDESPREAD RH VALUES OF 8 TO 15 PERCENT WILL PERSIST UNTIL TUE NIGHT. EVEN WITH MORE MODEST OFFSHORE WINDS...POOR RH RECOVERY IS STILL ANTICIPATED WED MORNING. ...LOWER CO RIVER VALLEY... TEMPERATURES WARMING INTO THE MIDDLE 70S TO MIDDLE 80S WILL LEAD TO LOW RH OF 6 TO 12 PERCENT. ALTHOUGH MODEL FORECASTS INDICATE LOW-LEVEL FLOW WILL DIMINISH DURING THE AFTERNOON...THEY VARY WITH THE MAGNITUDE OF THE WEAKENING. CONSENSUS WOULD SUGGEST SUSTAINED SURFACE SPEEDS WOULD BE MARGINAL /NEAR 20 MPH/. THUS...WILL REFRAIN FROM INTRODUCING A CRITICAL AREA ATTM. ..GRAMS.. 10/13/2008 ...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...