Area Forecast Discussion
Issued by NWS Charleston, WV

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000 FXUS61 KRLX 041407 AFDRLX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHARLESTON WV 1005 AM EDT MON MAY 4 2015 .SYNOPSIS... HIGH PRESSURE MOVES AWAY...ALLOWING A FRONT TO APPROACH FROM THE NORTHWEST LATER NIGHT. FRONT THEN LIFTS BACK NORTH MIDWEEK. && .NEAR TERM /THROUGH TONIGHT/...
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INCREASED SURFACE WINDS THIS AFTERNOON...ESPECIALLY FOR THE MID OHIO VALLEY INCLUDING SE OHIO. MID MORNING VAD WINDS SHOW 30 KNOTS AT 925 MB AT ILN. WEAK MID LEVEL DISTURBANCE MOVES THROUGH OHIO INTO WESTERN PENNSYLVANIA TONIGHT...THOUGH 500 MB HEIGHTS DO NOT FALL. QUESTIONS EXIST ON HOW FAR SOUTH TO INCLUDE THE POSSIBILITY OF A SHOWER OVERNIGHT INTO TUESDAY MORNING. WAS A BIT QUICKER INCREASING MID DECK AHEAD OF THIS FEATURE LATE THIS AFTERNOON IN THE MID OHIO VALLEY. ALSO WAS A BIT FASTER AND A BIT FURTHER SOUTH WITH POPS TONIGHT. AS A RESULT...LOWERED MAX TEMP A FEW DEGREES IN SE OHIO.
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&& .SHORT TERM /TUESDAY THROUGH THURSDAY/... UPPER LEVEL RIDGE CONTROLS THE SYNOPTIC PATTERN FOR THE SOUTHERN AND CENTRAL APPALACHIANS. WARM FRONT WILL OSCILLATE NORTH AND SOUTH ALONG THE NORTHERN CWA BOUNDARY WITH PBZ THROUGH MID WEEK WHICH WILL DICTATE THE CHANCES FOR CONVECTION EACH AFTERNOON. WILL KEEP CONSISTENCY WITH THE PREVIOUS FORECAST FOR DAYS 2 AND 3 WITH HIGH CHANCE VALUES OVER NORTH CENTRAL WEST VIRGINIA AND SOUTHEAST OHIO. ALSO KEEPING POPS IN THE ELEVATED HEAT SOURCE REGIONS IN OUR EASTERN HIGHLANDS. CONVECTION MAY OR MAY NOT INITIATE IN OUR CWA...BUT 0-6KM BULK SHEAR VECTORS INDICATE STORMS WILL ADVECT INTO OUR AREA ACROSS THE NORTH. THIS IS TRUE FOR BOTH TUESDAY AND WEDNESDAY. HIGH PRESSURE DOMINATES THE SURFACE FLOW THURSDAY...AND HAVE ONLY CHANCES FOR CONVECTION OVER THE MOUNTAINS. SPC KEEPS ANY RISKS FOR SEVERE WEATHER WELL NORTH AND WEST FOR THE CWA. IN THE MEANT TIE...TEMPERATURES CONTINUE TO CREEP UPWARDS...WITH THE LOWLANDS TOPPING OUT IN THE MID 80S. OVERNIGHT LOWS WILL NOT DROP OUT OF THE 60S BY WEDNESDAY NIGHT. && .LONG TERM /THURSDAY NIGHT THROUGH SUNDAY/... USED WPC THINKING WITH SOME TWEAKS. A FRONT SHOULD BE LOCATED JUST TO THE NORTH OF THE AREA AT THE BEGINNING OF THE PERIOD. THE BOUNDARY SHOULD THEN PUSH NORTHEAST AWAY FROM THE AREA AS AN AREA OF LOW PRESSURE LIFTS NORTHEAST INTO CANADA. THIS WILL LEAVE THE FORECAST AREA IN THE WARM SECTOR. AT THE UPPER LEVELS...HIGH PRESSURE SHOULD BE IN CONTROL. THIS MAY RESULT IN SOME MAINLY AFTERNOON AND EVENING STORMS POSSIBLE. HOWEVER...MUCH OF THE REGION WILL REMAIN DRY THROUGH THE PERIOD. && .AVIATION /14Z MONDAY THROUGH FRIDAY/...
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12Z MONDAY THRU 12Z TUESDAY... VFR THRU THE TAF PERIOD. GENERALLY SCATTERED HIGHER BASED CU THIS AFTERNOON...WITH A STRAY MOUNTAIN SHOWER POSSIBLE. NO THUNDER. A WEAK FRONT APPROACHING FROM THE NORTH LATER TONIGHT AND TUESDAY MORNING WILL BEING VFR CEILINGS 5000-8000 FEET INTO THE NORTH...WITH POSSIBLY A SHOWER... AFFECTING PKB AND CKB. OTHERWISE...SOME MID TO HIGH CLOUDS. FORECAST CONFIDENCE AND ALTERNATE SCENARIOS THROUGH 12Z TUESDAY... FORECAST CONFIDENCE: HIGH. ALTERNATE SCENARIOS: NONE. 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 14 15 16 17 18 19 20 21 22 23 00 01 EDT 1HRLY 10 11 12 13 14 15 16 17 18 19 20 21 CRW CONSISTENCY H H H H H H H H H H H H HTS CONSISTENCY H H H H H H H H H H H H BKW CONSISTENCY H H H H H H H H H H H H EKN CONSISTENCY H H H H H H H H H H H H PKB CONSISTENCY H H H H H H H H H H H H CKB CONSISTENCY H H H H H H H H H H H H AFTER 12Z TUESDAY... NO WIDESPREAD IFR CONDITIONS EXPECTED.
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&& .RLX WATCHES/WARNINGS/ADVISORIES... WV...NONE. OH...NONE. KY...NONE. VA...NONE. && $$ SYNOPSIS...KTB/JMV/26 NEAR TERM...KTB SHORT TERM...26 LONG TERM...JSH AVIATION...JMV

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