Gale Warning 13, NWS Baltimore/Washington

072 
WHUS71 KLWX 191831
MWWLWX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
231 PM EDT FRI APR 19 2013

ANZ530>534-537>543-200245-
/O.CON.KLWX.GL.W.0013.000000T0000Z-130420T0200Z/
/O.NEW.KLWX.SC.Y.0092.130420T0200Z-130420T2200Z/
CHESAPEAKE BAY NORTH OF POOLES ISLAND MD-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD-
CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA-
TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
CHESTER RIVER TO QUEENSTOWN MD-EASTERN BAY-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
PATUXENT RIVER TO BROOMES ISLAND MD-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH
ISLAND-
231 PM EDT FRI APR 19 2013

...GALE WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM 10 PM THIS EVENING TO 6 PM
EDT SATURDAY...

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A
SMALL CRAFT ADVISORY...WHICH IS IN EFFECT FROM 10 PM THIS EVENING
TO 6 PM EDT SATURDAY. A GALE WARNING REMAINS IN EFFECT UNTIL
10 PM EDT THIS EVENING. 

* WINDS...34 TO 47 KNOTS WITHIN THE GALE WARNING. 18 TO 33 KNOTS 
  WITHIN THE SMALL CRAFT ADVISORY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 18 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$

ANZ535-536-200245-
/O.CON.KLWX.GL.W.0013.000000T0000Z-130420T0200Z/
/O.NEW.KLWX.SC.Y.0092.130420T1000Z-130420T2200Z/
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD-
231 PM EDT FRI APR 19 2013

...GALE WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING...
...SMALL CRAFT ADVISORY IN EFFECT FROM 6 AM TO 6 PM EDT
SATURDAY...

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A
SMALL CRAFT ADVISORY...WHICH IS IN EFFECT FROM 6 AM TO 6 PM EDT
SATURDAY. A GALE WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS
EVENING. 

* WINDS...34 TO 47 KNOTS WITHIN THE GALE WARNING. 18 TO 33 KNOTS 
  WITHIN THE SMALL CRAFT ADVISORY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 18 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$

302 
WHUS71 KLWX 191836
MWWLWX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
236 PM EDT FRI APR 19 2013

ANZ530>534-537>543-200245-
/O.CON.KLWX.GL.W.0013.000000T0000Z-130420T0200Z/
/O.CON.KLWX.SC.Y.0092.130420T0200Z-130420T2200Z/
CHESAPEAKE BAY NORTH OF POOLES ISLAND MD-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD-
CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA-
TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
CHESTER RIVER TO QUEENSTOWN MD-EASTERN BAY-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
PATUXENT RIVER TO BROOMES ISLAND MD-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH
ISLAND-
236 PM EDT FRI APR 19 2013

...GALE WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 PM THIS EVENING
TO 6 PM EDT SATURDAY...

A GALE WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING. A
SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 PM THIS EVENING TO
6 PM EDT SATURDAY. 

* WINDS...34 TO 47 KNOTS WITHIN THE GALE WARNING. 18 TO 33 KNOTS 
  WITHIN THE SMALL CRAFT ADVISORY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 18 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$

ANZ535-536-200245-
/O.CON.KLWX.GL.W.0013.000000T0000Z-130420T0200Z/
/O.CON.KLWX.SC.Y.0092.130420T1000Z-130420T2200Z/
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD-
236 PM EDT FRI APR 19 2013

...GALE WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 6 AM TO 6 PM EDT
SATURDAY...

A GALE WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING. A
SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 6 AM TO 6 PM EDT
SATURDAY. 

* WINDS...34 TO 47 KNOTS WITHIN THE GALE WARNING. 18 TO 33 KNOTS 
  WITHIN THE SMALL CRAFT ADVISORY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 18 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$

307 
WHUS71 KLWX 192137
MWWLWX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
537 PM EDT FRI APR 19 2013

ANZ530>534-537-539>541-543-200545-
/O.CON.KLWX.GL.W.0013.000000T0000Z-130420T0200Z/
/O.EXT.KLWX.SC.Y.0092.130420T0200Z-130421T1000Z/
CHESAPEAKE BAY NORTH OF POOLES ISLAND MD-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD-
CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA-
TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA-
CHESTER RIVER TO QUEENSTOWN MD-EASTERN BAY-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH
ISLAND-
537 PM EDT FRI APR 19 2013

...GALE WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING...
...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 10 PM THIS EVENING TO
6 AM EDT SUNDAY...

THE SMALL CRAFT ADVISORY IS NOW IN EFFECT FROM 10 PM THIS EVENING
TO 6 AM EDT SUNDAY. A GALE WARNING REMAINS IN EFFECT UNTIL 10 PM
EDT THIS EVENING. 

* WINDS...34 TO 47 KNOTS WITHIN THE GALE WARNING. 18 TO 33 KNOTS 
  WITHIN THE SMALL CRAFT ADVISORY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 18 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$

ANZ538-542-200545-
/O.CON.KLWX.GL.W.0013.000000T0000Z-130420T0200Z/
/O.CON.KLWX.SC.Y.0092.130420T0200Z-130420T2200Z/
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
PATUXENT RIVER TO BROOMES ISLAND MD-
537 PM EDT FRI APR 19 2013

...GALE WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 PM THIS EVENING
TO 6 PM EDT SATURDAY...

A GALE WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING. A
SMALL CRAFT ADVISORY REMAINS IN EFFECT FROM 10 PM THIS EVENING TO
6 PM EDT SATURDAY. 

* WINDS...34 TO 47 KNOTS WITHIN THE GALE WARNING. 18 TO 33 KNOTS 
  WITHIN THE SMALL CRAFT ADVISORY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 18 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$

ANZ535-536-200545-
/O.CON.KLWX.GL.W.0013.000000T0000Z-130420T0200Z/
/O.EXT.KLWX.SC.Y.0092.130420T0200Z-130420T2200Z/
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD-
537 PM EDT FRI APR 19 2013

...GALE WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING...
...SMALL CRAFT ADVISORY NOW IN EFFECT FROM 10 PM THIS EVENING TO
6 PM EDT SATURDAY...

THE SMALL CRAFT ADVISORY IS NOW IN EFFECT FROM 10 PM THIS EVENING
TO 6 PM EDT SATURDAY. A GALE WARNING REMAINS IN EFFECT UNTIL
10 PM EDT THIS EVENING. 

* WINDS...34 TO 47 KNOTS WITHIN THE GALE WARNING. 18 TO 33 KNOTS 
  WITHIN THE SMALL CRAFT ADVISORY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 18 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$

194 
WHUS71 KLWX 200031
MWWLWX

URGENT - MARINE WEATHER MESSAGE
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
831 PM EDT FRI APR 19 2013

ANZ535-536-200845-
/O.CAN.KLWX.GL.W.0013.000000T0000Z-130420T0200Z/
/O.EXT.KLWX.SC.Y.0092.130420T0031Z-130420T2200Z/
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD-
831 PM EDT FRI APR 19 2013

...SMALL CRAFT ADVISORY NOW IN EFFECT UNTIL 6 PM EDT SATURDAY...
...GALE WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS CANCELLED
THE GALE WARNING. THE SMALL CRAFT ADVISORY IS NOW IN EFFECT UNTIL
6 PM EDT SATURDAY. 

* WINDS...18 TO 33 KNOTS WITHIN THE SMALL CRAFT ADVISORY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 18 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$

ANZ530>534-537-539>541-543-200845-
/O.CON.KLWX.GL.W.0013.000000T0000Z-130420T0200Z/
/O.CON.KLWX.SC.Y.0092.130420T0200Z-130421T1000Z/
CHESAPEAKE BAY NORTH OF POOLES ISLAND MD-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD-
CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA-
TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA-
CHESTER RIVER TO QUEENSTOWN MD-EASTERN BAY-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH
ISLAND-
831 PM EDT FRI APR 19 2013

...GALE WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT SUNDAY...

A GALE WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING. A
SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 AM EDT SUNDAY. 

* WINDS...34 TO 47 KNOTS WITHIN THE GALE WARNING. 18 TO 33 KNOTS 
  WITHIN THE SMALL CRAFT ADVISORY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 18 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$

ANZ538-542-200845-
/O.CON.KLWX.GL.W.0013.000000T0000Z-130420T0200Z/
/O.CON.KLWX.SC.Y.0092.130420T0200Z-130420T2200Z/
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
PATUXENT RIVER TO BROOMES ISLAND MD-
831 PM EDT FRI APR 19 2013

...GALE WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING...
...SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM EDT
SATURDAY...

A GALE WARNING REMAINS IN EFFECT UNTIL 10 PM EDT THIS EVENING. A
SMALL CRAFT ADVISORY REMAINS IN EFFECT UNTIL 6 PM EDT SATURDAY. 

* WINDS...34 TO 47 KNOTS WITHIN THE GALE WARNING. 18 TO 33 KNOTS 
  WITHIN THE SMALL CRAFT ADVISORY. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A GALE WARNING MEANS WINDS OF 34 TO 47 KNOTS ARE IMMINENT OR
OCCURING. OPERATING A VESSEL IN GALE CONDITIONS REQUIRES
EXPERIENCE AND PROPERLY EQUIPPED VESSELS. IT IS HIGHLY
RECOMMENDED THAT MARINERS WITHOUT THE PROPER EXPERIENCE SEEK SAFE
HARBOR PRIOR TO THE ONSET OF GALE CONDITIONS.

A SMALL CRAFT ADVISORY MEANS THAT WIND SPEEDS OF 18 TO 33 KNOTS
ARE EXPECTED TO PRODUCE HAZARDOUS WAVE CONDITIONS TO SMALL CRAFT.
INEXPERIENCED MARINERS...ESPECIALLY THOSE OPERATING SMALLER
VESSELS SHOULD AVOID NAVIGATING IN THESE CONDITIONS.

&&

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
748 AM EDT FRI APR 19 2013

.SYNOPSIS...
A COLD FRONT WILL APPROACH THE AREA THIS MORNING BEFORE PASSING
THROUGH FROM WEST TO EAST THIS AFTERNOON AND EVENING. WIDESPREAD
SHOWERS AND THUNDERSTORMS ARE EXPECTED ALONG AND AHEAD OF THE
BOUNDARY. CANADIAN HIGH PRESSURE WILL BUILD INTO THE REGION LATE
TONIGHT THROUGH SUNDAY...BRINGING DRY AND COOL CONDITIONS. HIGH
PRESSURE WILL REMAIN OVERHEAD EARLY NEXT WEEK.

&&

.NEAR TERM /THROUGH TONIGHT/...
CURRENT ANALYSIS SHOWS A STRONG COLD FRONT MOVING THROUGH THE OHIO
VALLEY EARLY THIS MORNING. HIGH PRESSURE REMAINS CENTERED OVER THE
ATLANTIC OCEAN.

THE PRESSURE GRADIENT BETWEEN THE APPROACHING COLD FRONT AND HIGH
PRESSURE OVER THE ATLANTIC CONTINUES TO INCREASE. SOUTHERLY WINDS
AHEAD OF THE COLD FRONT HAVE USHERED IN WARM AND MOIST AIR. THE
LOW-LEVEL JET WILL CONTINUE TO STRENGTHEN THIS MORNING...AND THE
SOUTHERLY FLOW WILL CAUSE LOW CLOUDS ALONG WITH THE POSSIBILITY FOR
A COUPLE SHOWERS. HOWEVER...ANY RAINFALL WILL BE LIGHT.

THE COLD FRONT WILL MOVE THROUGH WEST VIRGINIA THIS MORNING AND THE
GRADIENT WILL CONTINUE TO INCREASE. THERE WILL BE ENOUGH MIXING DUE
TO THE GRADIENT FOR LOW CLOUDS TO MIX OUT...ALLOWING FOR SOME
SUNSHINE LATE THIS MORNING INTO THIS AFTERNOON. IT WILL TURN OUT
BREEZY THIS AFTERNOON WITH SOUTHERLY WINDS GUSTING AROUND 30 TO 35
MPH. HIGH AND MID-LEVEL CLOUDS WILL BE INCREASING AHEAD OF THE COLD
FRONT SO ANY SUNSHINE WILL BE LIMITED. THE COLD FRONT IS EXPECTED TO
PASS THROUGH OUR AREA FROM WEST TO EAST THIS AFTERNOON AND EVENING.
THE BOUNDARY WILL LIKELY MOVE INTO THE POTOMAC HIGHLANDS BY
MID-AFTERNOON BEFORE APPROACHING THE WASHINGTON/BALTIMORE
METROPOLITAN AREAS TOWARD EVENING. THE COLD FRONT WILL PASS THROUGH
LOWER SOUTHERN MARYLAND LATE THIS EVENING.

PLENTY OF WARM AND MOIST AIR WILL MOVE INTO THE REGION AHEAD OF THE
FRONT. THE COMBINATION OF THE MOIST AIRMASS ALONG WITH STRONG
FORCING FROM THE FRONT WILL RESULT IN WIDESPREAD SHOWERS AND
THUNDERSTORMS ALONG AND AHEAD OF THE BOUNDARY. SHOWERS MAY HANG
AROUND FOR A FEW HOURS BEHIND THE FRONT AS WELL BEFORE DRIER AIR
FINALLY WORKS ITS WAY IN. PRECIPITABLE WATERS WILL BE WELL OVER TWO
STANDARD DEVIATIONS ABOVE NORMAL AHEAD OF THE BOUNDARY. THE
COMBINATION OF THE DEEP MOISTURE...STRONG LOW-LEVEL JET AND
DYNAMICAL FORCING WILL RESULT IN LOCALLY HEAVY RAINFALL. RAINFALL
AMOUNTS AROUND ONE TO TWO INCHES ARE EXPECTED WITH LOCALLY HIGHER
AMOUNTS...AND MOST OF THAT MAY FALL IN A ONE TO THREE HOUR STRETCH.
THE HEAVIEST RAIN IS EXPECTED EAST OF THE BLUE RIDGE MOUNTAINS WHERE
MOISTURE WILL BE DEEPEST. HAVE NOT ISSUED A FLASH FLOOD WATCH AT
THIS TIME DUE TO HIGH FFG VALUES FROM THE RECENT DRY CONDITIONS.

THUNDERSTORMS WILL ALSO HAVE THE POTENTIAL TO PRODUCE LOCALLY
DAMAGING WIND GUSTS. WIND SPEEDS ASSOCIATED WITH THE LOW-LEVEL JET
WILL BE ABOVE 50 KNOTS JUST A COUPLE THOUSAND FEET FROM THE SURFACE.
INSTABILITY WILL BE LIMITED SO THERE IS STILL A QUESTION AS TO HOW
MUCH OF THESE WINDS WILL REACH THE SURFACE. THE BEST CHANCE APPEARS
TO BE JUST AHEAD OF THE COLD FRONT IN WHAT WILL LIKELY BE A LINE OF
SHOWERS AND T-STORMS...QLCS.

THE COLD FRONT WILL MOVE OFF TO OUR EAST OVERNIGHT AND ANY LEFTOVER
SHOWERS WILL ALSO MOVE OUT OF OUR AREA. MIN TEMPS OVERNIGHT WILL BE
NOTICEABLY CHILLIER COMPARED TO RECENT NIGHT...RANGING FROM THE 20S
ALONG THE RIDGE TOPS IN THE POTOMAC HIGHLANDS...TO THE MID AND UPPER
40S NEAR WASHINGTON/BALTIMORE...TO THE LOWER 50S ACROSS SOUTHERN
MARYLAND.

&&

.SHORT TERM /SATURDAY THROUGH SUNDAY/...
HIPRES BLDS OVER THE RGN THIS WKND. WL BE IN CAA REGIME MOST OF THE
TIME...W/ NW/NLY FLOW SAT BCMG NE/ELY SUN AS CENTER OF HIGH HEADS
TWD NEW ENGLND/QUE. SHUD BE DIURNAL CU SAT...SPCLY IN THE MTNS. BY
SUN...SUBSIDENCE SHUD PREVAIL.

TEMPS WL BE BLO CLIMO SAT...AND DROP A CPL MORE BY SUN. LTST
MOS/GOING FCST IN GOOD AGREEMENT. GROWING SEASON HAS STARTED E OF
BLURDG. ALTHO IT WL BE CHILLY SAT NGT...A LGT NLY BRZ AS CURRENTLY
PROGGED WUD PRECLUDE EITHER FROST OR SUBFRZG TEMPS. RECENT TEMP BIAS
HAS BEEN TO FCST TOO COLD. WL OMIT FROM HWO ATTM AS POTL FOR
HEADLINE CONDS SLIM.

&&

.LONG TERM /SUNDAY NIGHT THROUGH THURSDAY/...
MODEL GUIDANCE STILL INDICATING CAD SCENARIO DEVELOPING LATE IN THE
WEEKEND ONCE THE CENTER OF THE SFC HIGH SHIFTS EWD INTO SERN CANADA.
WEDGE OF COOLER AIR WILL SPILL SWD INTO THE MID-ATLANTIC REGION. THE
1040 MB HIGH WILL GRADUALLY PROGRESS EWD TOWARD THE CANADIAN
MARITIME...RESULTING IN ELY FLOW IN OUR AREA ERY NEXT WEEK. GIVEN
THE THE STILL COOL WATERS THIS TIME OF YR...CAD INVERSIONS ARE
DIFFICULT TO ERODE AND THUS HAVE THE POTENTIAL TO PERSIST FOR A
MULTI-DAY PERIOD ONCE AN OCEAN FETCH BECOMES ESTABLISHED. THIS MAY
BE THE CASE ERY NEXT WEEK. THE LATEST RUN OR TWO OF THE ECWMF...GFS
AND ITS ENSEMBLE MEAN SHOW AN INVERTED TROUGH DEVELOPING EAST OF
THIS CAD RIDGE BUT HAS BACKED OFF ON LOPRES DEVELOPMENT THAT TRACKS
CLOSE TO THE COAST. THUS KEPT MON-TUE FCST MAINLY DRY EXCEPT FOR LOW
CHANCE POPS NEAR THE CHSPK BAY. NONETHELESS...MARINE INFLUENCE WILL
RESULT IN CLOUDY CONDITIONS AND COOLER THAN NORMAL TEMPS.

COLD FRONT APPROACHES NEXT WED OR THU. STILL SOME UNCERTAINTY HOW
MUCH OF A WARMING TREND OCCURS MIDWEEK IN PRE-FRONTAL WARM SECTOR.
AS STATED ABOVE...CAD SETUP OFTEN TAKES LONGER TO ERODE...OFTEN
LONGER THAN MODELS INDICATE.

&&

.AVIATION /12Z FRIDAY THROUGH TUESDAY/...
AS OF 1145Z...SOME LIGHT SHOWERS ARE MOVING FROM SOUTH TO NORTH
ACROSS THE BALTIMORE/DC METRO TERMINALS AND CREATE SHORT-TERM VSBY
REDUCTIONS. THESE SHOWERS ARE EXPECTED TO PASS THROUGH BY 13Z.
OTHERWISE MOSTLY MVFR CIGS EXPECTED FOR MOST PART...WITH POTENTIAL
FOR CIGS RISING TO VFR FOR A WHILE DURING THE AFTERNOON.
SOUTHERLY WINDS WILL INCREASE WITH GUSTS AROUND 30 KNOTS
EXPECTED.

A STRONG COLD FRONT WILL PASS THROUGH THE TERMINALS LATE THIS
AFTERNOON AND EVENING. A LINE OF HEAVY SHOWERS AND THUNDERSTORMS IS
EXPECTED ALONG AND AHEAD OF THE COLD FRONT. THUNDERSTORMS WILL BE
CAPABLE OF PRODUCING GUSTY WINDS. TAFS MAY NEED TO BE AMENDED
LATER TO ADJUST TIMING OF THESE SHOWERS/STORMS.

HIPRES OVR THE TERMINALS THIS WKND. NW WNDS SAT G20-25KT...BCMG NLY
AND DIMINISHING SAT NGT...AND VEERING ELY SUN.

ONSHORE FLOW DEVELOPS LATE IN THE WEEKEND AS HIPRES SHIFTS OFF THE
NEW ENGLAND COAST. THERE IS A POTENTIAL FOR AN EXTENDED PERIOD OF
LOW CLOUDS AND FOG ERY NEXT WEEK IF ONSHORE FLOW PERSISTS.

&&

.MARINE...
A COLD FRONT WILL APPROACH THE WATERS TODAY BEFORE PASSING THROUGH
THIS EVENING. SOUTHERLY WINDS WILL CONTINUE TO INCREASE AHEAD OF THE
BOUNDARY. A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE WATERS THROUGH
THIS EVENING. A GALE WARNING MAY BE NEEDED FOR PORTIONS OF THE
WATERS THIS AFTERNOON AND EVENING. A LINE OF HEAVY SHOWERS AND
THUNDERSTORMS ARE EXPECTED ALONG AND JUST AHEAD OF THE COLD FRONT.
THE BEST CHANCE FOR THE HEAVIER PRECIPITATION OVER THE WATERS WILL
BE BETWEEN ABOUT 6 PM AND MIDNIGHT. THUNDERSTORMS WILL BE CAPABLE OF
PRODUCING GUSTY WINDS AND SPECIAL MARINE WARNINGS MAY BE WARRANTED.

THE COLD FRONT WILL MOVE OFF TO THE EAST LATE TONIGHT AND WINDS WILL
SHIFT TO THE NORTHWEST. THE SMALL CRAFT ADVISORY CONTINUES OVERNIGHT
FOR THE MARYLAND CHESAPEAKE BAY SOUTH OF POOLES ISLAND AND THE LOWER
TIDAL POTOMAC RIVER.

HIPRES BLDS ACRS THE WATERS THIS WKND. GOOD CAA SAT WL LEAD TO FVRBL
MOMENTUM TRANSFER AND RATHER HIGH MIXING HGTS. THIS WL PROMOTE 20-25
KT WNDS ACRS THE WATERS. HV ADDED SCA FOR ALL WATERS THRU 21Z. A
PRES SURGE MAY FLLW DOWN THE BAY SAT NGT.

BY SUN...THE SFC HIGH HEADS TWD NEW ENGLND...LEADING TO ELY FLOW ON
THE WATERS. WSPDS SHUD BE LIGHTER /UNDER SCA LVLS/. THE NELY/ELY
PTTN MAY LAST FOR A CPL DAYS.

&&

.TIDES/COASTAL FLOODING...
TIDAL DEPARTURES RUNNING BETWEEN A HALF-FT AND 1 FT ABV ASTRO NORMS
ATTM. A STIFF SLY FLOW ONGOING...WHICH WL ONLY INCREASE TDA AHEAD OF
APPROACHING CDFNT. THEREFORE...DO ANTICIPATE DEPARTURES TO INCREASE
FURTHER...WITH THE PM TIDE CYCLE THE ONE TO WATCH. HOWEVER...WE/RE
AT HALF-MOON...WHICH IS PROVIDING US WITH SOME WIGGLE ROOM.
DEPARTURES WILL NEED TO BE AROUND 1.5 FT FOR MOST SITES TO REACH
MINOR FLOOD THRESHOLDS. ANNAPOLIS MOST SUSCEPTIBLE AT 1.2 FT. CBOFS
/ADJUSTED FOR HIGH BIAS/ AND ESTOFS BOTH SUGGEST THAT THE TIDE WL
CREST ABOVE CAUTION STAGE BUT BELOW MINOR FLOOD. FOR DC...HEC-RAS
ALSO SUGGESTS THAT THE TIDE WL BE UNDER FLOOD STAGE. THEREFORE...WL
BE WITHHOLDING ANY ADVISORIES AT THIS TIME. HOWEVER...CONSIDERING
MARGIN FOR ERROR...ITS CLOSE ENOUGH TO WARRANT A CONTINUING MENTION
IN HWO.

DEPARTURES SHOULD BE LOWER FOR THE AM CYCLE SAT...BUT BLOWOUT CONDS
MAY NOT BE REALIZED TIL LATE SAT-SAT NGT.

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
DC...NONE.
MD...NONE.
VA...NONE.
WV...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 5 PM EDT SATURDAY FOR ANZ531>534-
     537-539>541-543.
     SMALL CRAFT ADVISORY UNTIL MIDNIGHT EDT TONIGHT FOR ANZ530-535-
     536-538-542.
     SMALL CRAFT ADVISORY FROM 7 AM TO 5 PM EDT SATURDAY FOR ANZ530-
     535-536-538-542.

&&

AVIATION UPDATE...KCS

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
500 AM EDT FRI APR 19 2013

ANZ530>543-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057-
201000-
CHESAPEAKE BAY NORTH OF POOLES ISLAND MD-
CHESAPEAKE BAY FROM POOLES ISLAND TO SANDY POINT MD-
CHESAPEAKE BAY FROM SANDY POINT TO NORTH BEACH MD-
CHESAPEAKE BAY FROM NORTH BEACH TO DRUM POINT MD-
CHESAPEAKE BAY FROM DRUM POINT MD TO SMITH POINT VA-
TIDAL POTOMAC FROM KEY BRIDGE TO INDIAN HEAD MD-
TIDAL POTOMAC FROM INDIAN HEAD TO COBB ISLAND MD-
TIDAL POTOMAC FROM COBB ISLAND MD TO SMITH POINT VA-
PATAPSCO RIVER INCLUDING BALTIMORE HARBOR-
CHESTER RIVER TO QUEENSTOWN MD-EASTERN BAY-
CHOPTANK RIVER TO CAMBRIDGE MD AND THE LITTLE CHOPTANK RIVER-
PATUXENT RIVER TO BROOMES ISLAND MD-
TANGIER SOUND AND THE INLAND WATERS SURROUNDING BLOODSWORTH
ISLAND-DISTRICT OF COLUMBIA-NORTHERN BALTIMORE-HARFORD-
SOUTHERN BALTIMORE-PRINCE GEORGES-ANNE ARUNDEL-CHARLES-ST. MARYS-
CALVERT-PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-
KING GEORGE-
500 AM EDT FRI APR 19 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE MARYLAND PORTION OF THE
CHESAPEAKE BAY...TIDAL POTOMAC RIVER...AND ADJACENT COUNTIES IN
CENTRAL MARYLAND AND NORTHERN VIRGINIA AS WELL AS THE DISTRICT OF
COLUMBIA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE EXPECTED TO MOVE EAST ACROSS THE AREA LATE THIS
AFTERNOON INTO THE EVENING AS A COLD FRONT MOVES THROUGH. A FEW
STORMS MAY BE SEVERE WITH LOCALLY DAMAGING WINDS AND HEAVY RAIN.

A STRENGTHENING SOUTHERLY FLOW MAY PRODUCE MINOR COASTAL FLOODING
NEAR TIMES OF HIGH TIDE THIS AFTERNOON AND EVENING.

A SMALL CRAFT ADVISORY IS IN EFFECT THROUGH THIS EVENING FOR THE
MARYLAND CHESAPEAKE BAY AND TIDAL POTOMAC RIVER. GALES ARE
POSSIBLE THIS AFTERNOON AND EVENING FOR PORTIONS OF THE WATERS.
THE SMALL CRAFT ADVISORY CONTINUES OVERNIGHT FOR THE MARYLAND
CHESAPEAKE BAY SOUTH OF POOLES ISLAND AND THE LOWER AND MIDDLE
PORTIONS OF THE TIDAL POTOMAC RIVER.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

A SMALL CRAFT ADVISORY IS IN EFFECT FOR THE ENTIRE MARYLAND
PORTION OF THE CHESAPEAKE BAY AND TIDAL POTOMAC RIVER SATURDAY. A
SMALL CRAFT ADVISORY MAY BE NEEDED FOR PORTIONS OF THE WATERS
SATURDAY NIGHT INTO SUNDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED TODAY.

MDZ003>005-009-010-501-502-VAZ025>031-036>040-042-050-051-501>504-
WVZ050>053-055-501>506-201000-
WASHINGTON-FREDERICK MD-CARROLL-MONTGOMERY-HOWARD-
EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-AUGUSTA-
ROCKINGHAM-SHENANDOAH-FREDERICK VA-PAGE-WARREN-CLARKE-NELSON-
ALBEMARLE-GREENE-MADISON-RAPPAHANNOCK-LOUDOUN-ORANGE-CULPEPER-
NORTHERN FAUQUIER-SOUTHERN FAUQUIER-WESTERN HIGHLAND-
EASTERN HIGHLAND-HAMPSHIRE-MORGAN-BERKELEY-JEFFERSON-HARDY-
WESTERN GRANT-EASTERN GRANT-WESTERN MINERAL-EASTERN MINERAL-
WESTERN PENDLETON-EASTERN PENDLETON-
500 AM EDT FRI APR 19 2013

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EASTERN WEST VIRGINIA...
NORTHERN AND CENTRAL VIRGINIA...AND CENTRAL AND WESTERN MARYLAND
WITH THE EXCEPTION OF GARRETT COUNTY.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS ARE EXPECTED TO MOVE EAST ACROSS THE AREA TODAY INTO
THIS EVENING AS A COLD FRONT MOVES THROUGH. A FEW STORMS MAY BECOME
SEVERE WITH LOCALLY DAMAGING WINDS AND HEAVY RAIN.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED TODAY.

HTS