Area Forecast Discussion
Issued by NWS Sterling, VA

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FXUS61 KLWX 271512 AAE
AFDLWX

AREA FORECAST DISCUSSION...UPDATED
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1012 AM EST TUE JAN 27 2015

.SYNOPSIS...
STRONG LOW PRESSURE WILL CONTINUE TO TRACK NORTHEAST OFF THE NEW
ENGLAND COAST THROUGH TONIGHT. HIGH PRESSURE WILL BUILD OVERHEAD
WEDNESDAY BEFORE A CLIPPER SYSTEM PASSES THROUGH LATER THURSDAY
INTO THURSDAY NIGHT. HIGH PRESSURE WILL RETURN FOR FRIDAY INTO
SATURDAY. LOW PRESSURE MAY IMPACT THE AREA BY SUNDAY.

&&

.NEAR TERM /THROUGH TONIGHT/...
SEVERAL MORE HRS OF THE DIRECT INFLUENCE OF A LARGE-SCALE LOW
PRESSURE SYSTEM SWINGING AROUND THE NORTHEAST. ONE SIZEABLE
LINGERING SNOW BAND CONTINUES TO HANG OVER THE AREA...FROM BUFFALO
NY TO NORFOLK VA. THIS FEATURE IS EFFECTIVELY THE MODIFIED AND
LEFTOVER UPPER ENERGY FROM THE CLIPPER SYSTEM THAT ARRIVED OVER
THE AREA LATE LAST WEEK. THE PRECIP W/ THIS BAND HAS GRADUALLY
DISSIPATED OVER THE PAST FEW HRS AND WILL COMPLETELY DISAPPEAR
LATER THIS AFTN. AS THIS FEATURE TILTS MORE NW-SE ACROSS OUR
CWA...WINDS WILL GET DRIVEN TO THE SFC IN THE 20-30MPH
RANGE...KEEPING LOW WIND CHILLS IN PLACE THROUGHOUT THE DAY. THIS
WILL BE THE MAIN WX STORY FOR OUR AREA INTO WED...THE LOW WIND
CHILLS/TEMPS AND GUSTY CONDITIONS. HIGHS TODAY WILL BARELY REACH
THE FREEZING MARK - WHERE IT DOES - AND SCATTERED FLURRIES AND
BRIEF LIGHT SNOW SHOWERS WILL CONTINUE TO PIVOT ACROSS THE REGION
WELL INTO THE AFTN HRS. NO ADDITIONAL ACCUM EXPECTED.

OVERNIGHT LOWS WILL FALL BACK INTO THE SINGLE DIGITS OUT WEST TO
THE TEENS TO LOWER 20S EAST. BREEZY NORTHWEST WINDS WILL REDUCE
WIND CHILLS INTO THE SINGLE DIGITS OVERNIGHT.

&&

.SHORT TERM /WEDNESDAY THROUGH WEDNESDAY NIGHT/...
HIGH PRESSURE WILL BUILD INTO THE MIDDLE ATLANTIC REGION ON
WEDNESDAY BRINGING A RETURN TO SUNSHINE AND LESS WIND. TEMPERATURE
WILL BE SLOW TO RISE AS COLD AIR REMAINS IN PLACE. AFTERNOON HIGH
TEMPERATURES WILL ONLY REACH THE UPPER 20S OVER THE NORTH AND WEST
TO THE MIDDLE AND UPPER 30S EAST.

HIGH PRESSURE WILL BUILD OVERHEAD WEDNESDAY NIGHT...BRINGING DRY
AND COLD CONDITIONS. WENT A FEW DEGREES BELOW GUIDANCE WITH THE
MIN TEMPS DUE TO RADIATIONAL COOLING WITH DRY CONDITIONS AND LIGHT
WINDS. MIN TEMPS WILL RANGE FROM THE SINGLE DIGITS AND LOWER TEENS
ACROSS NORTHERN MARYLAND...TO THE LOWER AND MIDDLE 20S IN
WASHINGTON AND BALTIMORE.

&&

.LONG TERM /THURSDAY THROUGH MONDAY/...
HIGH PRESSURE WILL MOVE OFF THE COAST THURSDAY MORNING. A CLIPPER
SYSTEM WILL MOVE INTO THE AREA THURSDAY AFTERNOON BEFORE PASSING
THROUGH THURSDAY EVENING. A PERIOD OF WINTRY PRECIPITATION IS
POSSIBLE DURING THIS TIME. HIGH PRESSURE WILL BUILD TOWARD THE
REGION FRIDAY. GUSTY NORTHWEST WINDS ARE EXPECTED AHEAD OF THIS
SYSTEM AND IT WILL BE QUITE COLD. HIGH PRESSURE WILL BUILD
OVERHEAD FRIDAY NIGHT AND SATURDAY. WINDS WILL GRADUALLY DIMINISH
BUT IT WILL REMAIN COLD.

LOW PRESSURE MAY IMPACT THE AREA SUNDAY AND MONDAY...BRINGING A
CHANCE FOR WINTRY PRECIPITATION. DETAILS ARE HIGHLY UNCERTAIN THIS
FAR OUT.

&&

.AVIATION /15Z TUESDAY THROUGH SATURDAY/...
CIGS AND VSBYS WILL LIFT TO VFR LATER TODAY AS LOW PRESSURE PULLS
AWAY FROM THE REGION. VFR CONDITIONS ARE EXPECTED TONIGHT AND
WEDNESDAY.

VFR CONDITIONS ARE EXPECTED WEDNESDAY NIGHT THROUGH THURSDAY
MORNING. A CLIPPER SYSTEM MAY BRING SOME WINTRY PRECIPITATION AND
SUBVFR CONDITIONS THURSDAY AFTERNOON INTO THURSDAY EVENING. GUSTY
NORTHWEST WINDS ARE EXPECTED BEHIND THIS SYSTEM FRIDAY...BUT HIGH
PRESSURE WILL BUILD OVERHEAD FRIDAY NIGHT INTO SATURDAY.

&&

.MARINE...
WIND GUSTS ON THE WATERS WILL REACH 25 TO 30 KTS AS LOW PRESSURE
PULLS AWAY TO THE NORTHEAST AND HIGH PRESSURE BUILDS TOWARD THE
MIDDLE ATLANTIC. THE GRADIENT WILL BE SLOW TO RELAX AND SCA
CONDITIONS WILL BE POSSIBLE INTO EARLY WEDNESDAY.

HIGH PRESSURE WILL BUILD OVER THE WATERS WEDNESDAY NIGHT. A CLIPPER
SYSTEM WILL PASS THROUGH THE WATERS LATER THURSDAY INTO THURSDAY
NIGHT. A SMALL CRAFT ADVISORY MAY BE NEEDED FOR PORTIONS OF THE
WATERS DURING THIS TIME. HIGH PRESSURE WILL BUILD TOWARD THE
WATERS FRIDAY.

HIGH PRESSURE WILL BUILD TOWARD THE WATERS FRIDAY...BUT GUSTY
NORTHWEST WINDS ARE EXPECTED AHEAD OF THIS SYSTEM. A SMALL CRAFT
ADVISORY WILL LIKELY BE NEEDED AND A GALE WARNING MAY BE NEEDED
FOR PORTIONS OF THE WATERS DURING THIS TIME. GUSTY WINDS WILL
CONTINUE INTO FRIDAY. GUSTY WINDS WILL CONTINUE INTO FRIDAY NIGHT
BEFORE HIGH PRESSURE BUILDS OVERHEAD SATURDAY.

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
DC...NONE.
MD...NONE.
VA...NONE.
WV...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 6 PM EST WEDNESDAY FOR ANZ530>543.

&&

$$
UPDATE...GMS
PREV DISCUSSION...KRW/BJL






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