Area Forecast Discussion
Issued by NWS Sterling, VA

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000 FXUS61 KLWX 220807 AFDLWX AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC 407 AM EDT SUN MAR 22 2015 .SYNOPSIS...
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HIGH PRESSURE WILL BUILD OVERHEAD TODAY AND CONTINUE TO BUILD THROUGH TUESDAY. HIGH PRESSURE WILL MOVE OFF THE EASTERN SEABOARD ON WED. A COLD FRONT WILL CROSS THE AREA THURSDAY. CANADIAN HIGH PRESSURE WILL RETURN FOR FRIDAY INTO THE WEEKEND.
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&& .NEAR TERM /THROUGH TONIGHT/...
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A COLD FRONT WILL CONTINUE TO MOVE ACROSS THE MID-ATLANTIC THIS MORNING. AN UPPER LEVEL TROUGH IS LOCATED ACROSS THE SOUTHERN PLAINS WHILE LOW PRESSURE DEVELOPES ALONG THE GULF COAST STATES. A 100KT JET WILL TRANSPORT MID-HIGH LEVEL CLOUDS ACROSS THE REGION THIS MORNING. ANOTHER UPPER LEVEL TROUGH ACROSS QUEBEC AND NRN NEW ENGLAND WILL KEEP THE SOUTHERN STREAM SYSTEM SOUTH OF THE MID- ATLANTIC REGION. HIGH PRESSURE WILL MOVE INTO THE REGION FROM THE GREAT LAKES TODAY. NORTHERLY WINDS AND PTLY CLOUDY SKIES WILL LIMIT STRONG HEATING TODAY. HIGH PRESSURE WILL MOVE OVER THE CHESAPEAKE BAY THIS AFTERNOON AND FLOW SHOULD BECOME SE ACROSS THE FOOTHILLS AND SHENANDOAH VALLEY. FCST MAX TEMPS ARE IN THE MID TO UPPER 40S ACROSS THE MD/PA BORDER TO THE MID TO UPPER 50S ACROSS THE CENTRAL FOOTHILLS AND SHENANDOAH VALLEY. ONSHORE FLOW WILL KEEP CONDITIONS CLOUDY ACROSS THE VA HIGHLANDS...SHENANDOAH VALLEY AND FOOTHILLS TONIGHT. FURTHER NORTH...PARTLY CLOUDY CONDITIONS EXPECTED. LIGHT FLOW WILL ALLOW TEMPS TO RADIATE IN THE 20S TO LOW 30S.
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&& .SHORT TERM /MONDAY/...
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ANOTHER ROUND OF HIGH PRESSURE MOVES ACROSS THE REGION MONDAY. NORTHWEST FLOW ALOFT MAY LEAD TO MID-HIGH LEVEL CLOUDS MOVING IN. NRLY WINDS WILL LEAD TO BELOW NORMAL TEMPS MONDAY. FCST MAX TEMPS INT HE 40S.
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&& .LONG TERM /MONDAY NIGHT THROUGH SATURDAY/...
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SERIES OF HIGH PRESSURE SYSTEMS WILL INFLUENCE THE WEATHER THROUGH MID WEEK KEEP TEMPERATURES BELOW NORMAL. LOW PRESSURE MOVING INTO THE GREAT LAKES REGION WED WILL BEGIN USHER IN WARM TEMPS STARTING WED AND CONTINUING INTO THU. A STRONG COLD FRONT WILL MOVE ACROSS THE AREA ON THU...AND BRING AROUND OF SHOWERS WITH FRONTAL PASSAGE AND PERHAPS EVEN ISOLATED TSTMS. PERHAPS SOME UPSLOPE SNOW SHOWERS LATE THU NIGHT INTO FRI ALONG THE FAR WESTERN RIDGES. HIGH PRESSURE BUILDS IN FRIDAY AND CONTINUES INTO NEXT WEEKEND KEEPING TEMPS BELOW NORMAL.
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&& .AVIATION /08Z SUNDAY THROUGH THURSDAY/...
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VFR CONDITIONS EXPECTED TODAY...TONIGHT AND MONDAY. HIGH PRESSURE WILL MOVE INTO THE REGION TODAY AND AGAIN ON MONDAY. NRLY WINDS WILL BECOME EASTERLY AT CHO THIS AFTERNOON AND EVENING. NERLY WINDS EXPECTED MONDAY. GENERALLY VFR MON NIGHT THROUGH WED...WITH MVFR IN CIGS ON THU IN SHOWER ACTIVITY ALONG AHEAD OF A COLD FRONT.
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&& .MARINE...
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A COLD FRONT WILL CONTINUE TO CROSS THE WATERS THIS MORNING. A NRLY SURGE WILL LEAD TO SCA CONDITIONS THIS MORNING. HIGH PRESSURE WILL MOVE ACROSS THE WATERS THIS EVENING. ANOTHER SURGE OF NRLY WINDS WILL MOVE ACROSS THE WATERS LATE TONIGHT AND A SCA IS IN EFFECT. HIGH PRESSURE WILL MOVE OVER THE WATERS MONDAY. HIGH PRES BUILDS OVER THE AREA TUE THEN SLIDES OFFSHORE ON WED AHEAD OF A STRONG COLD FRONT THAT WILL MOVE THROUGH THE WATERS THU. WINDS BELOW SCA LEVELS MON NIGHT THROUGH WED...AND WITH SOUTHERLY RETURN FLOW AND APPROACH OF COLD FRONT WED...WINDS COULD APPROACH SCA LEVELS ON SOUTHERN PORTION OF CHES BAY AND LOWER TIDAL POTOMAC ON WED.
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&& .LWX WATCHES/WARNINGS/ADVISORIES...
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DC...NONE. MD...NONE. VA...NONE. WV...NONE. MARINE...SMALL CRAFT ADVISORY UNTIL 6 AM EDT EARLY THIS MORNING FOR ANZ530>532-535-536-538>542. SMALL CRAFT ADVISORY FROM 11 PM THIS EVENING TO 6 AM EDT MONDAY FOR ANZ530>534-537-539>541-543. SMALL CRAFT ADVISORY UNTIL 1 PM EDT THIS AFTERNOON FOR ANZ533- 534-537-543.
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&& $$ SYNOPSIS...HAS/SMZ NEAR TERM...HAS SHORT TERM...HAS LONG TERM...SMZ AVIATION...HAS/SMZ MARINE...HAS/SMZ

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