Storm Prediction Center Day 1 Fire Weather Outlook

Created: Sat Dec 3 16:06:03 UTC 2016 (20161203 1700Z Day 1 FireWX shapefile | 20161203 1700Z Day 1 FireWX KML)

Day 1 Fire Weather Forecast graphic
Risk Area (sq. mi.) Area Pop. Some Larger Population Centers in Risk Area
Critical 4,126 14,157,016 Los Angeles, CA...Long Beach, CA...Santa Ana, CA...Anaheim, CA...Riverside, CA...

Click for Day 1 FireWX Areal Outline Product

   ZCZC SPCFWDDY1 ALL
   FNUS21 KWNS 031602

   DAY 1 FIRE WEATHER OUTLOOK  
   NWS STORM PREDICTION CENTER NORMAN OK
   1002 AM CST SAT DEC 03 2016

   VALID 031700Z - 041200Z

   ...CRITICAL FIRE WEATHER AREA FOR PORTIONS OF SOUTHERN CALIFORNIA...

   16Z SURFACE OBSERVATIONS ACROSS SOUTHERN CA INDICATE MODERATE TO
   STRONG OFFSHORE FLOW CONTINUES...MAINLY IN THE HIGHER TERRAIN AND
   PASSES WHERE SUSTAINED WINDS OF 20-40 MPH ARE OCCURRING...ALONG WITH
   GUSTS AROUND 60 MPH. THE SURFACE PRESSURE GRADIENT ACROSS THIS
   REGION WILL SUPPORT ELEVATED TO CRITICAL FIRE WEATHER CONDITIONS
   THROUGH TONIGHT INTO EARLY SUNDAY MORNING. NO CHANGES HAVE BEEN MADE
   TO THE ELEVATED OR CRITICAL AREAS ACROSS PORTIONS OF SOUTHERN CA.
   SEE THE PREVIOUS DISCUSSION BELOW FOR MORE INFORMATION.

   ..GLEASON.. 12/03/2016

   .PREV DISCUSSION.../ISSUED 0223 AM CST SAT DEC 03 2016/

   ...SYNOPSIS...
   AN UPPER LOW OVER THE GULF OF CALIFORNIA WILL CONTINUE TO DROP
   SOUTH-SOUTHEAST TODAY ACROSS NORTHWEST MEXICO. THIS WILL MAINTAIN
   STRONG DEEP-LAYER NORTHERLY FLOW ACROSS MUCH OF THE PACIFIC COAST
   STATES. AT THE SURFACE...HIGH PRESSURE OVER THE GREAT BASIN AND A
   TROUGH ALONG THE CA COAST WILL RESULT IN A FAVORABLE PRESSURE
   GRADIENT FOR CONTINUED OFFSHORE FLOW. ELSEWHERE...WEAK UPPER LEVEL
   RIDGING WILL SPREAD EASTWARD FROM THE PLAINS TO THE OHIO VALLEY...AND
   WIDESPREAD SHOWERS AND THUNDERSTORMS ARE EXPECTED.

   ...SOUTHERN CA...

   CONDITIONS WILL BE SIMILAR TO THOSE ON FRIDAY...BUT WINDS MAY BE
   ABOUT 10-15 MPH LIGHTER WHILE RH VALUES FALL BY 5-10 PERCENT. THE
   HIGHEST WIND SPEEDS WILL BE IN THE MOUNTAINS /35 MPH GUSTING TO 60
   MPH/ WITH SOMEWHAT LIGHTER SPEEDS IN VALLEY LOCATIONS /25 MPH
   GUSTING TO 45 MPH/. NEAR THE COAST...WIND SPEEDS AROUND 20-25 MPH CAN
   BE EXPECTED. RH VALUES IN LOWER ELEVATIONS WILL RANGE FROM THE
   SINGLE DIGITS TO 12 PERCENT...WHILE MOUNTAIN LOCATIONS FALL INTO THE
   TEENS AND 20 PERCENT RANGE. WIND SPEEDS WILL WEAKEN IN LOWER
   ELEVATIONS DURING THE EVENING...BUT GUSTY WINDS /THOUGH LIGHTER THAN
   DURING THE MORNING INTO LATE AFTERNOON/ WILL CONTINUE THROUGH THE
   OVERNIGHT HOURS IN THE MOUNTAINS AND TYPICAL WIND-PRONE AREAS. 

   ...SOUTHERN GA INTO NORTHERN FL...

   DRY CONDITIONS WILL CONTINUE ACROSS THE REGION WITH SURFACE HIGH
   PRESSURE CENTERED OVER THE MIDDLE MS AND OH VALLEY REGIONS...
   MAINTAINING NORTHEASTERLY WINDS. RH VALUES WILL FALL INTO THE 25-35
   PERCENT RANGE...THOUGH WIND SPEEDS GENERALLY LESS THAN 10 MPH WILL
   LIMIT THE OVERALL THREAT.

   ...PLEASE SEE WWW.SPC.NOAA.GOV/FIRE FOR GRAPHIC PRODUCT...

      

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