Lodi, CA Weather

MUCH COOLER DAY OVER INTERIOR NORCAL TODAY
AS UPPER-LEVEL PACIFIC
TROF MOVES INLAND AND ACROSS NORCAL THRU
TONITE. ONSHORE GRADIENTS
HAVE BEEN INCREASING AND SYNOPTIC COOLING
AND DELTA BREEZE WILL
BEGIN TO COOL THE AIR MASS MORE AS THE DAY
WEARS ON. THE 24-HR TEMP
CHANGE IS JUST BEGINNING TO SHOW SOME
COOLING AT PRESS TIME...WITH
850 MBS TEMPS AND LOW TO MID LEVEL
THICKNESSES SUGGESTING AT LEAST
SOME 4 TO 11 DEG OF COOLING OVER MOST OF
THE AREA. OUR MAX TEMP
CHANGE GRID SHOWS THE EQUIVALENT...SOME 3
TO 13 DEG OF COOLING
TODAY.

CHANCE OF SHOWERS AND ISOLATED
THUNDERSTORMS STILL LOOK POSSIBLE
MAINLY OVER OUR NERN ZONES PER THE
PREVIOUS DISCUSSION. THE SPC
12-HR PROB OF TSTORMS SHOWS ABOUT A 1 IN 5
CHANCE OVER THE NRN
SIERNEV MAINLY N OF THE TAHOE AREA THIS
AFTERNOON AND TONITE. THIS
IS IN LINE WITH THE MODEL CAPE/INSTABILITY
FORECASTS. THE NAM/WRF
SURFACE BOUNDARY ASSOCIATED WITH UPPER
TROF SHOWS A MODEST
CONVERGENCE ZONE MOVING FROM THE SHASTA CO
MTNS SEWD TOWARDS THE
I-80 CORRIDOR BY LATE THIS EVENING...AND
THEN SE OF OUR AREA FRI
MORNING. WINDS WILL TURN NWLY BEHIND THE
BOUNDARY TONIGHT AND FRI
MORNING. BEST CHANCE OF TSTORMS THIS
AFTERNOON AND EVENING IS
EXPECTED TO BE IN THE PROXIMITY OF THE
SURFACE BOUNDARY/CONVERGENCE
ZONE.    JHM


.PREVIOUS DISCUSSION...

PRETTY GOOD AGREEMENT IN ALL MODELS THAT A
FAIRLY WELL DEFINED
COOL FRONT ASSOCIATED WITH UPPER WAVE WILL
PUSH ACROSS THE AREA THIS
AFTERNOON. NAM PICKING UP ON PRETTY GOOD
700 MB FRONTOGENESIS AND
SURFACE CONVERGENCE LINE PUSHING FROM
NORTH TO SOUTH ACROSS THE
AREA THIS AFTERNOON. INSTABILITY FORECAST
FROM LOCAL WRF MODEL
PRETTY HIGH AND LOOKS OVERDONE WITH LOW
LEVELS PRETTY DRY WITH
THIS SYSTEM. NAM/GFS HAVE BEEN CONSISTENT
AND HAVE PICKED UP ON AN
AREA OF CAPE OF AROUND 400 J/KG TO BE IN
PLACE IN PLUMAS AND
SIERRA COUNTY THIS AFTERNOON AS FRONT
PUSHES THROUGH. THIS IS
WHERE THERE SHOULD BE A FEW SHOWERS AND
THUNDERSTORMS. NAM ALSO
PLACING SOME INSTABILITY AND LIFT ON THE
WEST SIDE OF THE VALLEY IN
LAKE COUNTY SO HAVE ADDED SOME SLIGHT
CHANCES THERE FOR THIS
AFTERNOON AND EVENING. SREF PROBABILITIES
ALSO IN LINE WITH LOWER
INSTABILITY SHOWING ONLY A SLIGHT CHANCE
OF CAPE OVER 500 J/KG
ANYWHERE TODAY. OVER THE VALLEY WITH DRY
LOW LEVELS SHOULD BE
ANYTHING MORE THAN CLOUDS AND MAYBE A
SPRINKLE. EXPECT BREEZY
CONDITIONS IN THE DELTA WITH CONTINUED
ONSHORE FLOW AND STILL
THINK WE COULD SEE SOME STRATUS INTRUDE
INTO VALLEY LATER THIS
MORNING.

ON FRIDAY...THE SYSTEM MOVES QUICKLY OFF
TO THE EAST AND WE SHOULD
SEE A LITTLE NORTHERLY WIND...BUT NOTHING
TOO BAD. TEMPERATURES
SHOULD MODERATE BUT WEATHER WILL BE DRY.

SATURDAY AND SUNDAY...HIGHER HEIGHTS BUILD
INTO THE AREA SATURDAY BUT
TROUGH BEGINS TO MOVE ONTO WEST COAST
SHORE SUNDAY EVENING. AHEAD
OF IT GOOD TEMPERATURE WARM UP THOUGH AND
SUNDAY LOOKS PRETTY WARM
IN THE 90S...AND SHOULD BE THE WARMEST DAY
FOR NEXT 7 DAYS. RASCH

.EXTENDED DISCUSSION (MONDAY THROUGH
THURSDAY)

COOLER WEATHER WILL ARRIVE WITH THE NEW
WORK WEEK ON MONDAY AS A
TROUGH OF LOW PRESSURE MOVES OVER THE WEST
COAST. MOST OF THE
MOISTURE ASSOCIATED WITH THIS TROUGH WILL
BE CARRIED NORTH OF THE
AREA...THOUGH THE THREAT OF SOME SHOWERS
IN THE NORTHERN
MOUNTAINS EXISTS. THE TROUGH MOVES INLAND
TUE AND HEIGHTS BEGIN TO
RISE OVER THE EASTERN PACIFIC AS A RIDGE
BUILDS. MODELS DIVERGE AS
TO THE LOCATION AND TIMING OF
FEATURES...BUT THE MAIN IDEA IS A
COOLER START TO THE WEEK WITH A GENERALLY
DRY PATTERN. DK