Fire Weather Outlook Discussion
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FNUS21 KWNS 031603
FWDDY1

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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