FXUS61 KALY 200158 AFDALY AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE ALBANY, NY 1000 PM EDT MON JUL 19 2004 .UPDATE...MOST ACTIVITY HAS DIED. BORDERLINE SEVERE STORM SCHOHARIE CTY. UPDATES OUT .SYNOPSIS...500 HPA TROUGH OVER WESTERN NEW YORK HEADING EAST. SURFACE HIGH OVER THE DEEP SOUTH. COLD FRONT EXTENDS FROM LOW IN NORTHERN QUEBEC TO WESTERN LAKE SUPERIOR. && .SHORT TERM (TONIGHT AND TUESDAY)...WIDESPREAD CONVECTION BREAKING OUT TO OUR WEST. ALSO NUMEROUS SHOWERS/TSTMS POPPING UP OVER HIGHER ELEVATION REGIONS. THE CONVECTION OUT WEST APPEARS TO LINE UP WITH THE 500 HPA TROF AND COLD CORE. IT APPEARS TO BE DIMINISHING SOME WHAT AS IT MOVES EAST. WILL GO WITH SHRA/TSRA LIKELY TO THE WEST OF THE HUDSON VALLEY AND ALSO OVER THE BERKS/GREEN MTNS...WITH HIGH CHANCE POPS OVR THE HUDSON VALLEY AND NWRN CT...FOR LATE AFTERNOON INTO THIS EVENING...FOLLOWED BY FOG DUE TO RESIDUAL MOISTURE. WILL KEEP EARLY TUESDAY DRY FOLLOWED BY A CHANCE OF SHWRS/TSTMS TUESDAY AFTERNOON/EVENING AS FRONT PASSES THRU THE REGION...AGAIN FOLLOWED BY PATCHY FOG IN THE LATE NIGHT HOURS. && .LONG TERM (WEDNESDAY THROUGH MONDAY... ON WED A WEAK HIGH DROPS DOWN FROM EASTERN CANADA...BUT ITS EFFECTS ARE RATHER SHORT LIVED AS THE CIRCULATION RETURNS TO A SOUTHWESTERLY DIRECTION BRINGING IN WARM AND HUMID AIR. THURSDAY NIGHT THE GFS DEVELOPS A LOW OVER VIRGINIA JUST SOUTHEAST OF THE TROF EXTENDING FROM THE ST LAWRENCE VALLEY TO SOUTHERN MISSOURI. THE TROF ROTATES EAST FRIDAY AS A HIGH BUILDS OVER THE GREAT LAKES...BRINGING A STRONG COLD FRONT THRU THE REGION FRIDAY WITH GOOD FORCING JUST AHEAD OF IT. THE GFS PUTS THE TROF ASSOCIATED WITH THE FRONT FROM CONCORD NH THRU NEW YORK CITY SW TO RALEIGH AT 00Z SATURDAY AND THE TROF CONTINUES EAST INTO THE ATLANTIC AS THE CANADIAN HIGH BUILDS IN AND TAKES OVER OUR WEATHER FOR THE WEEKEND. THE TROF IS FORECAST TO STALL OFF THE EAST COAST BUT LOOKS TO BE FAR ENOUGH OUT TO SEA TO AFFECT OUR WEATHER ASIDE FROM BRINGING IN SOME HIGH LEVEL CLOUDS. ON SUNDAY NIGHT MARINE AIR BEGINS TO WORK ITS WAY INTO OUR SOUTHEASTERN ZONES. A HIGH OFF THE NEW ENGLAND COAST AND A LOW OVER THE SOUTHEASTERN STATES ALONG WITH AN UPPER TROF OVER THE GREAT LAKES RESULTS IN WARM MOIST AIR OFF THE GULF STREAM BEING FORCED UPSLOPE OVER THE APPLACIANS AND OVER THE COOLER AIR WEST OF THE APPALACIANS. && .AVIATION... GENERALLY VFR CONDITIONS TO PREVAIL THROUGH THE REMAINDER OF THE AFTERNOON...EXCEPT IN SHRA/TSRA WHERE CONDITIONS WILL LOWER TO MVFR. EXPECT MVFR CONDITIONS TO PERSIST THROUGH NIGHT MAINLY DUE TO VISIBILITIES. EXPECTATION IS FOR SKIES TO REMAIN BKN/OVC THROUGH THE NIGHT. HOWEVER...AS REFLECTED IN POU TAF...WHERE SKIES GO SCT... CONDITIONS TO DETERIORATE TO IFR DUE TO BR. MVFR/VFR FOR TUESDAY MORNING. WINDS LIGHT THROUGHOUT FORECAST PERIOD. && .HYDROLOGY... SHOWERS AND THUNDERSTORMS ASSOCIATED WITH THE UPPER LOW ARE NOT EXPECTED TO BRING ENOUGH RAINFALL TO CAUSE ANY FLOODING PROBLEMS. HOWEVER THURSDAY AFTERNOON THROUGH MIDDAY FRIDAY THERE MAY BE A POSSIBILITY OF LOCALLY HEAVY RAIN FROM THUNDERSTORMS THAT ARE SLOW MOVING OR FOLLOWING EACH OTHER IN A LINE. WIDESPREAD HEAVY RAIN IS NOT EXPECTED...BUT SOME STREAMS OR SMALLER RIVERS COULD EXPERIENCE SHARP RISES. && .ALY WATCHES/WARNINGS/ADVISORIES... NY...NONE VT...NONE MA...NONE CT...NONE && $$ SYNOPTIC/HYDRO...KILPATRICK AVIATION...OKEEFE