Area Forecast Discussion
Issued by NWS San Joaquin Valley, CA

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000
FXUS66 KHNX 260053
AFDHNX

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA
453 PM PST THU DEC 25 2014

.SYNOPSIS...
A COOL NORTHERLY FLOW WILL PREVAIL OVER THE REGION AS HIGH PRESSURE
WILL REMAIN OFF THE WEST COAST...LOW TEMPERATURES WILL REACH THE
COLDEST SO FAR THIS SEASON TONIGHT AND AGAIN FRIDAY NIGHT. AS THE
HIGH MOVES INLAND BY EARLY NEXT WEEK...TEMPERATURES ARE EXPECTED TO
MODERATE.



&&

.DISCUSSION...
NORTHERLY FLOW BEHIND THE QUICK MOVING FRONTAL SYSTEM HAS BROUGHT
COOLER AIR INTO THE REGION AND 24 HR TEMPERATURE TRENDS ARE
GENERALLY RUNNING DOWN A FEW TO SEVERAL DEGREES ACROSS OUR AREA.
UPPER LEVEL JET ENERGY ON THE BACKSIDE OF THE TROUGH HAS HELPED TO
GENERATE GUSTY WINDS ALONG THE WEST SIDE OF THE VALLEY THIS
AFTERNOON. THESE WINDS ARE PROGGED TO CALM BY SUNSET AND THE WIND
ADVISORY HAS BEEN ALLOWED TO EXPIRE. WITH THE COLDER AIR IN
PLACE...WE EXPECT TO SEE POCKETS OF FROST IN THE VALLEY BY FRIDAY
MORNING ALONG WITH WIDESPREAD FREEZING TEMPERATURES IN THE DESERT
AREAS.

BY SATURDAY MORNING WITH THE COLD AIRMASS IN PLACE...MODELS
SUGGEST OVERNIGHT LOWS FALLING A FEW MORE DEGREES. THIS WILL LEAD
TO MORE WIDESPREAD TEMPERATURES BELOW 32 IN THE VALLEY ALONG WITH
MANY LOCATIONS BELOW 28 IN THE KERN COUNTY DESERT AREAS. A FREEZE
WATCH HAS BEEN ISSUED FOR THE SAN JOAQUIN VALLEY AND A HARD FREEZE
WATCH FOR THE KERN COUNTY DESERT ZONES FOR LATE FRIDAY NIGHT
THROUGH SATURDAY MORNING.

ADDITIONAL SHORTWAVE ENERGY DROPS THROUGH THE PACIFIC NORTHWEST
BY SATURDAY AND BY MONDAY MODELS ARE IN REASONABLE AGREEMENT IN
DEVELOPING A CLOSED LOW NEAR THE GREAT BASIN. SOME DIFFERENCES IN
MODEL SOLUTIONS BEGIN FOR THE FIRST PART OF NEXT WEEK BUT THERE IS
GENERAL AGREEMENT IN RETROGRADING THE LOW ACROSS CENTRAL
CALIFORNIA DURING THE EXTENDED PERIOD. WE WILL HAVE TO WATCH THIS
SETUP FOR A POSSIBLE CHANCE OF PRECIP OVER THE MOUNTAINS BY
TUESDAY ALONG WITH STRONG OFFSHORE WINDS BY NEW YEARS EVE.


&&

.AVIATION...
MVFR CEILINGS CAN BE EXPECTED ALONG THE WEST SLOPES OF THE SOUTHERN
SIERRA AND THE NORTH FACING SLOPES OF THE TEHACHAPI MOUNTAINS
THROUGH 06Z FRIDAY. VFR CONDITIONS WILL PREVAIL ELSEWHERE ACROSS THE
CENTRAL CALIFORNIA INTERIOR DURING THE NEXT 24 HOURS.
.END..
&&

.AIR QUALITY ISSUES...
NONE.

&&

.CERTAINTY...

THE LEVEL OF CERTAINTY FOR DAYS 1 AND 2 IS MEDIUM.
THE LEVEL OF CERTAINTY FOR DAYS 3 THROUGH 7 IS MEDIUM.

THIS INFORMATION IS PROVIDED AS PART OF A TRIAL PROJECT CONDUCTED
BY THE NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD.
CERTAINTY LEVELS INCLUDE LOW...MEDIUM...AND HIGH. PLEASE VISIT
WWW.WEATHER.GOV/HNX/CERTAINTY.PHP /ALL LOWER CASE/ FOR ADDITIONAL
INFORMATION AND/OR TO PROVIDE FEEDBACK.

&&

.CLIMATE...
             RECORDS
SITE DATE    HI_MAX:YEAR LO_MAX:YEAR HI_MIN:YEAR LO_MIN:YEAR

KFAT 12-25       72:1902     38:1908     54:1983     20:1987
KFAT 12-26       70:1892     38:1908     55:1983     21:1987
KFAT 12-27       72:1991     37:1908     55:1977     23:1962

KBFL 12-25       76:1902     32:1918     56:1977     21:1899
KBFL 12-26       71:1999     35:1918     56:1977     20:1905
KBFL 12-27       72:1991     39:1933     56:1977     23:1930
&&

.HNX WATCHES/WARNINGS/ADVISORIES...
FREEZE WATCH FROM LATE FRIDAY NIGHT THROUGH SATURDAY MORNING
CAZ089>092.

HARD FREEZE WATCH FROM LATE FRIDAY NIGHT THROUGH SATURDAY
MORNING CAZ098-099.

&&

$$

PUBLIC...JEB
AVN/FW...DCH
SYNOPSIS...BSO

WEATHER.GOV/HANFORD


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