809 
FXUS66 KHNX 191654
AFDFAT



INTERIOR CENTRAL CALIFORNIA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE HANFORD CA
845 AM PST FRI JAN 19 2001

SHORT WAVE WEAKENING AS IT MOVES INTO CA. LARGE SWATH OF MID/HI 
CLOUDS HAS SPREAD INTO MOST OF THE DISTRICT...EXCEPT A FEW BREAKS 
APPARENT EARLY THIS MORN IN THE FAR S AROUND KERN COUNTY. MID/HI 
CLOUD COVER WHICH ARRIVED OVERNIGHT ESP NORTH HAS RESULTED IN MUCH 
HIGHER MIN TEMPS THIS MORN...TEMPS UP 5 TO 10 DEGF IN VLLY/FOOTHILLS 
AND 10-15 DEGF OR MORE DIFFERENCE IN HIER ELEVATIONS. CLOUDS WILL 
CONTINUE THRU THE DAY AND SIGNIFICANTLY DAMPEN HTNG CURVES. 
PRECIP-WISE YOSEMITE VLLY RECORDED A BRIEF LIGHT SHOWER AND TUOLUMNE 
MDWS HAD LIGHT SNOW ACCUM...WITH LOTS OF AMBIENT UPPER MSTR AND WEAK 
LIFT WILL MAINTAIN A CHANCE MENTION FOR SOME LIGHT SNOW OVER HIER 
ELEVS SIERRA REST OF TODAY. 

TONIGHT AS NVA/SUBSIDENCE AXIS MOVE IN...EXPECT SKIES TO GRDLY CLEAR 
OUT FROM NW-SE. CONCERNS FOR FROST AND FOG WILL AGAIN RETURN TO THE 
VLLY...EARLY LOOK SUGGESTS GOOD POTENTIAL FOR BOTH AREAS OF FROST 
AND AREAS OF FOG DEVELOPING AGAIN LATE TONIGHT AND EARLY SAT. 
 
NEXT SYSTEM APPROACHES SUNDAY WITH STILL AMPLE UNCERTAINTY ON ITS 
TRACK. NEW 12Z AVN IS SIMILAR TO LAST NITES MRF BRINGING DEEPER 
CUTOFF DIRECTLY OVER SRN SIERRA...AND IN STARK CONTRAST THE 12Z ETA 
AGREES WITH UKMET AND DIGS SYSTEM MUCH FURTHER SOUTH...KEEPING IT 
OFF THE COAST AND SW OF MONTEREY SUN AFTN. WILL EXAMINE THIS CLOSER 
FOR AFTN PKG. 

FURTHER OUT...MED RANGE MODELS ON AVERAGE HAVE RADICALLY SHIFTED 
SINCE YESTERDAY AND TRENDED A LONGWAVE PATTERN SHIFT AS DISCUSSED BY 
NCEP. THUS POTENTIALLY A MUCH WETTER SCENARIO FOR SYSTEM WED/THU. 

.HNX...NONE. 

LAVIS