Area Forecast Discussion
Issued by NWS Burlington, VT

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000 FXUS61 KBTV 230859 AFDBTV AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BURLINGTON VT 359 AM EST SUN NOV 23 2014 .SYNOPSIS... A FEW RAIN SHOWERS WILL LINGER INTO THIS MORNING, BUT WARMER AND DRIER AIR WILL SETTLE IN FOR THE AFTERNOON. ANOTHER ROUND OF RAIN SHOWERS AND BREEZY CONDITIONS WILL ARRIVE LATE SUNDAY NIGHT INTO MONDAY. MONDAY WILL BE OUR WARMEST DAY...WITH HIGH TEMPERATURES WELL INTO THE 50S. A COLD FRONT WILL USHER IN MORE SEASONABLE TEMPERATURES ON WESTERLY WINDS TUESDAY AND TUESDAY NIGHT. && .NEAR TERM /UNTIL 7 PM THIS EVENING/... AS OF 345 AM EST SUNDAY...TEMPERATURES WILL CONTINUE TO RISE ON THE SOUTH TO SOUTHWESTERLY FLOW OVER THE REGION. RISING HEIGHTS ALOFT WILL ALLOW FOR A DRYING TREND THROUGHOUT THE DAY. CLOUDS WILL BE VARIABLE THROUGHOUT THE DAY WITH LINGERING RAIN SHOWERS THIS MORNING COMING TO AN END BY EARLY AFTERNOON. WINDS WILL GENERALLY BE LIGHTER THROUGHOUT THE DAY OUT OF THE SOUTH AT 6-12 KTS. MAX TEMPERATURES THIS AFTERNOON WILL REACH THE MID 40S FOR MOST SECTIONS. && .SHORT TERM /7 PM THIS EVENING THROUGH TUESDAY/... AS OF 356 AM EST SUNDAY...CLOUDS INCREASE THIS EVENING AHEAD OF UPPER LEVEL LONGWAVE TROUGH WITH STRENGTHENING CLOSED SURFACE LOW APPROACHING THE GREAT LAKES REGION TONIGHT. A WARM FRONT ASSOCIATED WITH THIS SYSTEM WILL SPREAD RAIN SHOWERS FROM SOUTHWEST TO NORTHEASTWARD INTO THE NORTH COUNTRY GENERALLY AFTER MIDNIGHT. ABUNDANT MOISTURE WILL ACCOMPANY THIS SYSTEM ON THE ORDER OF 3 TO 4 STANDARD DEVIATIONS ABOVE NORMAL. AS THE WARM FRONT LIFTS ACROSS THE AREA...STRONG ISENTROPIC ASCENT COMBINED WITH THE ABUNDANT MOISTURE WILL PRODUCE QPF AMOUNTS RANGING FROM A THIRD OF AN INCH TO ALMOST AN INCH POSSIBLE. HIGHEST RAINFALL AMOUNTS LIKELY BE NEAR SOUTHEASTERN SLOPES OF ADIRONDACKS AND CENTRAL TO SOUTHERN GREEN MTNS...AS MODEL ANOMALIES FOR 925MB AND 850MB SHOWING 3 TO 5 STANDARD DEVIATIONS ABOVE NORMAL. THIS THINKING IS REINFORCED BY NAM AND GFS 850MB JET OF 70+ KTS PRESENT EARLY MONDAY. WITH THIS STRONG JET, WE MAY SEE SOME GUSTS LOCALLY TO 35-40 MPH ALONG THE WESTERN SLOPES OF THE GREEN MTNS 06Z MONDAY THROUGH 15Z MONDAY. THE LATTER HALF OF MONDAY COULD SEE BREAKS IN PRECIP AS DRY SLOT MOVES OVER THE AREA. 850MB TEMPS APPROACHING +10C PLUS POSSIBLE BREAKS IN CLOUDS MONDAY AFTERNOON, COULD HAVE MAX TEMPERATURES REACH HIGHS 55-60F. COLD FRONT ARRIVES LATE MONDAY NIGHT WITH GRADUAL COOLDOWN TOWARD DAYBREAK TUESDAY AND GENERAL DRYING TREND. TUESDAY WILL BE NOTICEABLY COOLER WITH MAX TEMPERATURES BACK IN THE UPPER 30S TO MID 40S. && .LONG TERM /TUESDAY NIGHT THROUGH SATURDAY/... AS OF 317 AM EST SUNDAY...EXTENDED FORECAST BEGINS QUIETLY WITH FULL LATITUDE EASTERN US TROUGH AXIS RUNS NORTH/SOUTH ALONG THE MISSISSIPPI RIVER WITH SOUTHWESTERLY UPPER LEVEL FLOW OVER THE NORTHEAST US. NEAR NORMAL TEMPERATURES AND ONLY PRECIP OVER SOUTHERN ST. LAWRENCE/FRANKLIN COUNTIES IN NY IN ON PERIPHERY OF WEAK LAKE EFFECT BAND TUESDAY NIGHT INTO WEDNESDAY. MODEL DIFFERENCES CONTINUE WITH THIS FORECAST CYCLE FOR POTENTIAL COASTAL STORM WEDNESDAY NIGHT. 00Z ECMWF STICKING TO ITS GUNS AND BRINGING 992 MB SURFACE LOW ACROSS THE EASTERN TIP OF LONG ISLAND. MEANWHILE GFS MORE PROGRESSIVE, FURTHER EAST AND FASTER WITH ITS 1005 MB SURFACE LOW PASSING EAST OF THE BENCHMARK 40N/70W 12 HOURS EARLIER. FORECAST REFLECTS THIS UNCERTAINTY WITH CHANCE POPS FROM CHAMPLAIN VALLEY EASTWARD, TRANSITIONING TO SLIGHT CHANCE FROM THE ADIRONDACKS WEST. TEMPERATURES COLD ENOUGH FOR SNOW...STARTING OUT ABOVE FREEZING DURING DAY WEDNESDAY BUT FALLING BELOW FREEZING OVERNIGHT. REGARDLESS OF EXACT SURFACE LOW TRACK, A COLD FRONT WILL SWEEP THROUGH THE REGION WEDNESDAY NIGHT/THURSDAY. UP UNTIL THE FRONTAL PASSAGE TEMPERATURES WILL BE NEAR TO SLIGHTLY BELOW NORMAL, WITH HIGHS IN THE 30S AND LOWS IN THE 20S. BOTH MODELS FALL BACK INTO AGREEMENT LATER IN THE WEEK, FORECASTING POST-FRONTAL HIGH PRESSURE BRIEFLY OVER THE AREA ON FRIDAY. TEMPERATURES WILL REMAIN COLD ON FRIDAY WITH HIGHS MAINLY IN THE 20S. A CHANCE FOR SNOW AGAIN LATE FRIDAY INTO SATURDAY WHEN A SHORTWAVE TROUGH MOVING ALONG IN FAST WESTERLY FLOW, AND LOW LEVEL SOUTHWEST TO WESTERLY FLOW PROVIDING SOME UPSLOPE ENHANCEMENT. && .AVIATION /06Z SUNDAY THROUGH THURSDAY/... THROUGH 06Z MONDAY...IFR TO LIFR CIGS AT KSLK AND KMSS IN AREAS OF RAIN MOVING THROUGH THE REGION...AND MVFR TO VFR CIGS ELSEWHERE. RAIN TO CONTINUE OVERNIGHT THEN TAPER OFF THROUGH 14Z FROM WEST TO EAST. CIGS TO SLOWLY IMPROVE THROUGH THE DAY BUT REMAIN MOSTLY MVFR, THEN BECOME VFR AFT 00Z. OUTLOOK 06Z MONDAY THROUGH THURSDAY... 06Z MONDAY - 12Z TUESDAY...TRENDING TO MVFR AND POSSIBLE IFR IN MIXED PRECIPITATION AS A WARM FRONT LIFTS THROUGH THE REGION. 12Z TUESDAY - 00Z THURSDAY...GENERALLY VFR WITH MVFR/IFR CIGS/VIS IN LAKE EFFECT SNOW POSSIBLE AT KSLK. 00Z THURSDAY ONWARD...COASTAL SYSTEM TO POSSIBLY IMPACT THE REGION...THOUGH LOTS OF UNCERTAINTY AT THIS TIME. MAIN IMPACT WOULD BE TO EASTERN/SOUTHERN TAF SITES KMPV/KRUT, LESSER AT KMSS/KSLK. && .BTV WATCHES/WARNINGS/ADVISORIES... VT...NONE. NY...NONE. && $$ SYNOPSIS...KGM NEAR TERM...KGM SHORT TERM...KGM LONG TERM...HANSON AVIATION...HANSON

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