Issued by NWS San Joaquin Valley, CA
000 FXUS66 KHNX 120335 AFDHNX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE SAN JOAQUIN VALLEY - HANFORD CA 835 PM PDT SAT OCT 11 2008 .UPDATE...RADAR CONTINUES TO SHOW BANDS OF SNOW SHOWERS MOVING DOWN THE SIERRA AND WITH SATELLITE IMAGERY INDICATING MORE MOISTURE UPSTREAM IN THE CYCLONIC FLOW GRIDS HAVE BEEN UPDATED TO KEEP THE PRECIPITATION GOING OVERNIGHT. NO OTHER CHANGES TO GRIDS. && .DISCUSSION...DEEP CYCLONE REMAINS NEARLY STATIONARY OVER NORTHEAST NEVADA AND WITH LITTLE EASTWARD MOVEMENT THE CYCLONICALLY INDUCED BAND OF SNOW SHOWERS CONTINUES OVER THE SIERRA. OVER NORTHERN NEVADA ANOTHER AREA OF ENHANCED LIFT IS OCCURRING AND IT IS TAKING AIM ON THE EAST SIERRA FOR LATE TONIGHT AS LONG AS THE PARENT LOW DOESN`T MOVE QUICKLY TO THE EAST. LATEST GFS MODEL ACTUALLY ELONGATES THE LOW AND THEN SPLITS OFF A SECONDARY LOW OVER WEST CENTRAL NEVADA ON SUNDAY. THIS WILL LIKELY KEEP AT LEAST SOME CLOUDS IN THE SIERRA AND MAYBE A SNOW SHOWER OR TWO? FOR SURE TEMPERATURES WILL REMAIN BELOW NORMAL. WILL KEEP THE SIERRA ON SUNDAY FOR NOW, BUT IF MOISTURE MAKES IT FARTHER WEST THAN THE LATEST MODELS PROJECT, SOME POPS MAY HAVE TO BE REINTRODUCED. AS FOR THE PROSPECTS FOR FROST TONIGHT IN THE SAN JOAQUIN VALLEY...TEMPERATURE TRENDS ARE RUNNING DOWN A LITTLE FROM LAST NIGHT AND THE MID 30S WILL LIKELY BE MORE WIDESPREAD THAN LAST NIGHT. I DON`T EXPECT A BIG FROST EVENT BUT ANY FROST FOR EARLY OCTOBER IS WELL AHEAD OF THE CALENDAR. && .AVIATION...VFR ACROSS THE CENTRAL CALIFORNIA INTERIOR THROUGH 00Z MONDAY. && .AIR QUALITY ISSUES... NONE && .HNX WATCHES/WARNINGS/ADVISORIES... FROST ADVISORY FROM 2 AM TO 8 AM PDT SUNDAY FOR CAZ089>092. && $$ PUBLIC...DUDLEY AVN/FW...DCH WEATHER.GOV/HANFORD
