Area Forecast Discussion
Issued by NWS Charleston, WV

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000 FXUS61 KRLX 271311 AFDRLX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHARLESTON WV 801 AM EST FRI FEB 27 2015 .SYNOPSIS... ARCTIC AIR TODAY. HIGH PRESSURE TONIGHT INTO SATURDAY. CLIPPER LATE IN THE WEEKEND. ANOTHER LOW EARLY TO MID WEEK. && .NEAR TERM /THROUGH TONIGHT/... LAST OF THE SQUEEZE PLAY GOING ON EARLY THIS MORNING WITH FLUFFY SNOW SHOWERS OVER THE MOUNTAIN COUNTIES. THE BACK EDGE OF THE OVERCAST AND THE SNOW SHOWERS MAINLY EAST OF I-79 TO CRW TO NEAR KERMIT. MOSTLY LESS THAN AN INCH OF FLUFF NEXT FEW HOURS OVER MOUNTAIN COUNTIES. AS MENTIONED YESTERDAY...THE HOURLY TEMPERATURE MAY STILL GO DOWN THROUGH ABOUT 14/15Z. && .SHORT TERM /SATURDAY THROUGH MONDAY/... SATURDAY IS SHAPING UP TO BE BEST DAY BY FAR IN THE SHORT TERM PERIODS. JUST LOOKING AT SOME MID AND HI CLOUDS FROM TIME TO TIME AMID TEMPS IN THE UPPER 20S N TO LOW TO MID 30S S. BY SATURDAY EVENING...STRONG SFC HIGH WILL BE SHIFTING INTO NEW ENGLAND AS A WARM FRONT DEVELOPS ACROSS THE AREA. THIS WILL BE ACCOMPANIED BY SUBTLE VORT MAXES ZIPPING THRU THE FAST ZONAL FLOW ALOFT. APPEARS SE OH WILL SEE BEST SHOT OF PRECIP BREAKING OUT IN RESPONSE TO THIS AND GOOD ISENTROPIC LIFT LATE SATURDAY NIGHT INTO SUNDAY MORNING. THERMAL PROFILES SUPPORT PRIMARILY SNOW WITH THIS WHERE A FEW INCHES MAY ACCUMULATE ACROSS PERRY COUNTY. WILL INSERT A MENTION IN HWO FOR POTENTIAL HEADLINES FOR PERRY COUNTY. ELSEWHERE...THERE MAY BE ANOTHER BAND OF LIGHT WAA PRECIP OVER SW VA/S AND C WV/NE KY ZONES FIRST HALF OF SUNDAY. THIS MAY TAKE THE FORM OF A BRIEF MIX ACROSS S ZONES SUNDAY MORNING. AS SUNDAY PROGRESSES...S ZONES MAY DRY OUT IN THE AFTERNOON WITH WAA LIGHT PRECIP SHIFTING INTO N WV MAINLY IN THE FORM OF RAIN. HAVE TEMPS SPIKING INTO THE UPPER 40S ALONG AND S OF I64 WITH UPPER 30S TO MID 40S FURTHER N. SUNDAY NIGHT WILL FEATURE AFOREMENTIONED WARM FRONT SAGGING SE AS A COLD FRONT WITH HELP OF SURFACE HIGH TRYING TO NOSE INTO OH VALLEY FROM THE UPPER MIDWEST. RAIN SHOWERS WILL TRY TO CHANGE TO SNOW WITH FROPA BUT MOISTURE WILL BE WANING FOR ANY MEANINGFUL ACCUMULATION OUTSIDE OF THE MOUNTAINS. ACROSS THE N MOUNTAINS...THERMAL PROFILES REMAIN ON THE COLD SIDE IN THE HIGHER ELEVATIONS FOR A FEW INCHES TO ACCUMULATE SUNDAY NIGHT. HAVE TEMPS SLOWLY FALLING BUT STILL KEEP S HALF OF CWA ABOVE FREEZING. FOR MONDAY...AFOREMENTIONED HIGH PRESSURE WILL SCOOT ACROSS THE UPPER OH VALLEY INTO PA BY EVENING. THIS WILL ALLOW FOR A MAINLY DRY DAY AFTER MORNING MOUNTAIN SNOW SHOWERS. WILL BE DEALING WITH SOME MID AND HIGH CLOUDS THOUGH. TEMPS WILL RUN AROUND 40 S ZONES...TO MID 30S ACROSS SE OH AND N WV. && .LONG TERM /MONDAY NIGHT THROUGH THURSDAY/... ACTIVE WEATHER PATTERN IN THE LONG TERM...WITH LOTS OF UNCERTAINTY IN THE DETAILS. FRONTAL BOUNDARY SOUTH OF THE CWA AT THE BEGINNING OF THE PERIOD...WITH HIGH PRESSURE BUILDING IN BRIEFLY FROM THE NORTH. HOWEVER...THIS WILL BE SHORT LIVED AS ANOTHER LOW WILL MOVE EAST OUT OF THE PLAINS TOWARDS THE REGION. THERE COULD BE A BRIEF PERIOD OF SLEET OR FREEZING RAIN EARLY TUESDAY MORNING AT THE ONSET OF PRECIPITATION...BEFORE ENOUGH WARM AIR IS ABLE TO SCOUR OUT ANY COLD AIR NEAR THE SURFACE. WITH A GOOD SOUTHWESTERLY FLOW DEVELOPING...EXPECTING A CHANGE OVER TO RAIN BY TUESDAY AFTERNOON...EVEN ACROSS THE MOUNTAINS. AS MENTIONED IN PREVIOUS DISCUSSIONS...THERE WILL BE A GOOD TAP OF GULF MOISTURE...AND THERE IS THE POTENTIAL FOR A SECONDARY LOW TO RIDE UP OUT OF THE GULF INTO THE SOUTHEASTERN U.S. MID TO LATE WEEK...BUT MODELS ARE NOT IN GOOD AGREEMENT IN THE PATH/MOISTURE SPREAD ASSOCIATED WITH THIS FEATURE AT THIS TIME. SO...POINT IS...WITH AT LEAST 1 FEATURE EXPECTED EARLY NEXT WEEK...WITH THE POTENTIAL FOR HEAVY RAIN...AND A DECENT SNOW PACK IN PLACE IN SOME LOCATIONS...PARTICULARLY SOME OF THE MOUNTAINOUS LOCATIONS...WATER ISSUES ARE POSSIBLE. PARTICULARLY...IF THE SECONDARY FEATURE WOULD HAPPEN TO DEVELOP...AND SPREAD A SECONDARY ROUND OF PRECIPITATION ACROSS PARTS OF THE AREA LATE WEEK AFTER THE INITIAL SHOT. HOWEVER...ANOTHER ISSUE WITH THE SECONDARY FEATURE IS THAT BASED ON THE PATH...COULD EVEN SEE PERIODS OF SNOW...NOT JUST RAIN. SO...LOTS OF UNCERTAINTY IN AMOUNT/RATE OF SNOW MELT...AND EVEN IN PRECIPITATION AMOUNTS AND TYPES AT TIMES NEXT WEEK. SO...IN A NUTSHELL...WILL GO AHEAD AND HIGHLIGHT THE RISK FOR POTENTIAL FLOODING NEXT WEEK IN THE HWO...AS FEEL THERE IS AT LEAST SOME RISK WITH THE FIRST FEATURE EARLY/MID WEEK. && .AVIATION /13Z FRIDAY THROUGH TUESDAY/... A BAND OF SNOW ALONG THE ARCTIC FRONT PRODUCING IFR RESTRICTIONS AT TIMES WILL GRADUALLY DIMINISH EARLY THIS MORNING. SOME CLEARING CAN BE EXPECTED BEHIND THE ARCTIC FRONT IN KY...OH...AND WESTERN WEST VIRGINIA. UPSLOPE WILL SLOW THE PROGRESSION OF THE CLEARING IN EASTERN WV AND SW VA. EVENTUALLY THE DRY AIR BEHIND THE ARCTIC FRONT WILL WIN...WITH CLOUDS SCATTERING TODAY EVEN IN THE MOUNTAINS...AND CLEARING THIS EVENING. FORECAST CONFIDENCE AND ALTERNATE SCENARIOS THROUGH 12Z SATURDAY... FORECAST CONFIDENCE: MEDIUM. ALTERNATE SCENARIOS: TIMING OF CLOUD DECK CLEARING COULD VARY. EXPERIMENTAL TABLE OF FLIGHT CATEGORY OBJECTIVELY SHOWS CONSISTENCY OF WFO FORECAST TO AVAILABLE MODEL INFORMATION: H = HIGH: TAF CONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL. M = MEDIUM: TAF HAS VARYING LEVEL OF CONSISTENCY WITH MODELS. L = LOW: TAF INCONSISTENT WITH ALL MODELS OR ALL BUT ONE MODEL. UTC 1HRLY 11 12 13 14 15 16 17 18 19 20 21 22 EST 1HRLY 06 07 08 09 10 11 12 13 14 15 16 17 CRW CONSISTENCY M M M M H H M M M M H H HTS CONSISTENCY H H H H H H H M H H H H BKW CONSISTENCY H H H H M H H H H H H H EKN CONSISTENCY M M L M M H H H H H H H PKB CONSISTENCY H H H H H H H H H H H H CKB CONSISTENCY M M M H H H H M M M M M AFTER 12Z SATURDAY... IFR POSSIBLE IN RAIN OR MIXED RAIN/SNOW SUNDAY INTO MONDAY. && .RLX WATCHES/WARNINGS/ADVISORIES... WV...NONE. OH...NONE. KY...NONE. VA...NONE. && $$ SYNOPSIS...RPY/SL/30 NEAR TERM...KTB SHORT TERM...30 LONG TERM...SL AVIATION...RPY

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