Winter Storm Warning 2, NWS Baltimore/Washington

852 
WWUS41 KLWX 211011
WSWLWX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
511 AM EST SAT JAN 21 2012

MDZ003-501-502-VAZ028-WVZ050>052-503-504-211800-
/O.CON.KLWX.WS.W.0002.000000T0000Z-120121T1800Z/
WASHINGTON-EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-
FREDERICK VA-HAMPSHIRE-MORGAN-BERKELEY-WESTERN MINERAL-
EASTERN MINERAL-
INCLUDING THE CITIES OF...HAGERSTOWN...FROSTBURG...CUMBERLAND...
WINCHESTER...MARTINSBURG...ELK GARDEN...KEYSER...FORT ASHBY
511 AM EST SAT JAN 21 2012

...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...

* PRECIPITATION TYPE...PRIMARILY FREEZING RAIN.

* ACCUMULATIONS...ICE ACCUMULATION OF TWO- TO THREE-TENTHS INCH IN
  ADDITION TO ALREADY ACCUMULATED SNOW AND SLEET.

* TIMING...HEAVIEST FREEZING RAIN WILL BE FROM 5 AM TO 9 AM.

* TEMPERATURES...IN THE UPPER 20S. HIGHS IN THE LOW TO MID 30S.

* WINDS...NORTHEAST 5 MPH.

* IMPACTS...SLIPPERY ROADS WILL MAKE TRAVEL HAZARDOUS. ICE WILL 
  ACCUMULATE ON EXPOSED SURFACES...INCLUDING TREES AND POWER 
  LINES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW...SLEET
AND ICE ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE.
THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE.

&&

$$

VAZ025-026-036>038-503-504-WVZ505-506-211800-
/O.CON.KLWX.WW.Y.0006.000000T0000Z-120121T1800Z/
AUGUSTA-ROCKINGHAM-NELSON-ALBEMARLE-GREENE-WESTERN HIGHLAND-
EASTERN HIGHLAND-WESTERN PENDLETON-EASTERN PENDLETON-
INCLUDING THE CITIES OF...STAUNTON...WAYNESBORO...HARRISONBURG...
CHARLOTTESVILLE...HIGHTOWN...MONTEREY...CIRCLEVILLE...FRANKLIN
511 AM EST SAT JAN 21 2012

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...

* PRECIPITATION TYPE...PRIMARILY FREEZING RAIN.

* ACCUMULATIONS...UP TO ONE-TENTH INCH ICE ACCUMULATION IN
  ADDITION TO ALREADY ACCUMULATED SNOW AND SLEET.

* TIMING...FREEZING RAIN WILL CHANGE TO RAIN THIS MORNING.

* TEMPERATURES...UPPER 20S TO LOWER 30S. HIGHS IN THE LOWER 40S.

* WINDS...SOUTHWEST UP TO 5 MPH.

* IMPACTS...ICE WILL ACCUMULATE ON EXPOSED SURFACES...ESPECIALLY 
  TREES AND POWER LINES. SLIPPERY ROADS WILL MAKE TRAVEL 
  HAZARDOUS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET AND
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

DCZ001-MDZ009>011-013-014-016-VAZ027-029>031-039-040-042-050>057-
501-502-WVZ053-055-501-502-211800-
/O.CON.KLWX.WW.Y.0006.000000T0000Z-120121T1800Z/
DISTRICT OF COLUMBIA-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE-
PRINCE GEORGES-ANNE ARUNDEL-CHARLES-SHENANDOAH-PAGE-WARREN-CLARKE-
MADISON-RAPPAHANNOCK-LOUDOUN-ORANGE-CULPEPER-
PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-
KING GEORGE-NORTHERN FAUQUIER-SOUTHERN FAUQUIER-JEFFERSON-HARDY-
WESTERN GRANT-EASTERN GRANT-
INCLUDING THE CITIES OF...WASHINGTON...GAITHERSBURG...COLUMBIA...
BALTIMORE...ANNAPOLIS...WALDORF...FRONT ROYAL...LEESBURG...
CULPEPER...MANASSAS...MANASSAS PARK...FAIRFAX...ALEXANDRIA...
FALLS CHURCH...FREDERICKSBURG...WARRENTON...CHARLES TOWN...
MOOREFIELD...BAYARD...MOUNT STORM...PETERSBURG
511 AM EST SAT JAN 21 2012

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...

* PRECIPITATION TYPE...PRIMARILY FREEZING RAIN.

* ACCUMULATIONS...AROUND ONE-TENTH INCH ICE ACCUMULATION IN
  ADDITION TO ALREADY ACCUMULATED SNOW AND SLEET.

* TIMING...FREEZING RAIN WILL CHANGE TO RAIN LATE THIS MORNING.

* TEMPERATURES...UPPER 20S TO LOWER 30S. HIGHS IN THE MID TO UPPER
  30S.

* WINDS...NORTHEAST 5 TO 10 MPH.

* IMPACTS...ICE WILL ACCUMULATE ON EXPOSED SURFACES...ESPECIALLY 
  TREES AND POWER LINES. SLIPPERY ROADS WILL MAKE TRAVEL 
  HAZARDOUS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET AND
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

MDZ017-018-211800-
/O.CON.KLWX.WW.Y.0006.000000T0000Z-120121T1800Z/
ST. MARYS-CALVERT-
INCLUDING THE CITY OF...ST MARYS CITY
511 AM EST SAT JAN 21 2012

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...

* PRECIPITATION TYPE...PRIMARILY FREEZING RAIN AND FREEZING
  DRIZZLE.

* ACCUMULATIONS...LESS THAN ONE-TENTH INCH ICE ACCUMULATION IN
  ADDITION TO ALREADY ACCUMULATED SNOW AND SLEET.

* TIMING...FREEZING RAIN WILL CHANGE TO RAIN THIS MORNING. 

* TEMPERATURES...IN THE LOWER 30S. HIGHS IN THE UPPER 30S.

* WINDS...EAST 5 TO 10 MPH.

* IMPACTS...ICE WILL ACCUMULATE ON EXPOSED SURFACES...ESPECIALLY
  TREES AND POWER LINES. SLIPPERY ROADS WILL MAKE TRAVEL
  HAZARDOUS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET AND
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

MDZ004>007-211800-
/O.CON.KLWX.WW.Y.0006.000000T0000Z-120121T1800Z/
FREDERICK MD-CARROLL-NORTHERN BALTIMORE-HARFORD-
INCLUDING THE CITIES OF...FREDERICK...WESTMINSTER
511 AM EST SAT JAN 21 2012

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...

* PRECIPITATION TYPE...SNOW...SLEET AND FREEZING RAIN.

* ACCUMULATIONS...ONE- TO TWO-TENTHS INCH ICE ACCUMULATION. TOTAL
  SNOW AND SLEET ACCUMULATION OF AROUND 2 INCHES.

* TIMING...LINGERING SNOW AND SLEET WILL CHANGE TO FREEZING RAIN 
  EARLY THIS MORNING. FREEZING RAIN WILL CONTINUE THROUGH THE 
  MORNING. 

* TEMPERATURES...IN THE UPPER 20S.

* WINDS...NORTHEAST 5 TO 10 MPH.

* IMPACTS...ICE WILL ACCUMULATE ON EXPOSED SURFACES...ESPECIALLY 
  TREES AND POWER LINES. SLIPPERY ROADS WILL MAKE TRAVEL 
  HAZARDOUS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET AND
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

KRAMAR

282 
WWUS41 KLWX 211525
WSWLWX

URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1025 AM EST SAT JAN 21 2012

MDZ003-501-502-VAZ028-WVZ050>052-503-504-211800-
/O.CAN.KLWX.WS.W.0002.000000T0000Z-120121T1800Z/
/O.EXA.KLWX.WW.Y.0006.000000T0000Z-120121T1800Z/
WASHINGTON-EXTREME WESTERN ALLEGANY-CENTRAL AND EASTERN ALLEGANY-
FREDERICK VA-HAMPSHIRE-MORGAN-BERKELEY-WESTERN MINERAL-
EASTERN MINERAL-
INCLUDING THE CITIES OF...HAGERSTOWN...FROSTBURG...CUMBERLAND...
WINCHESTER...MARTINSBURG...ELK GARDEN...KEYSER...FORT ASHBY
1025 AM EST SAT JAN 21 2012

...WINTER WEATHER ADVISORY IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...
...WINTER STORM WARNING IS CANCELLED...

THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS
ISSUED A WINTER WEATHER ADVISORY FOR FREEZING RAIN AND FREEZING DRIZZLE...
WHICH IS IN EFFECT UNTIL 1 PM EST THIS AFTERNOON. THE WINTER STORM
WARNING HAS BEEN CANCELLED.

* PRECIPITATION TYPE...FREEZING RAIN AND FREEZING DRIZZLE.

* ACCUMULATIONS...A TRACE TO A COUPLE OF HUNDREDTHS OF ADDITIONAL ICE.

* TIMING...HEAVIEST PRECIPITATION HAS ENDED. PATCHY FREEZING RAIN
  AND AREAS OF FREEZING DRIZZLE WILL CONTINUE UNTIL THE EARLY AFTERNOON.

* TEMPERATURES...MID 20S TO AROUND 30.

* WINDS...NORTH UP TO 5 MPH.

* IMPACTS...SLIPPERY ROADS WILL MAKE TRAVEL HAZARDOUS. LIGHT ICING
  IS STILL POSSIBLE ON EXPOSED SURFACES...INCLUDING TREES AND POWER LINES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.


&&

$$

VAZ025-026-036>038-503-504-WVZ505-506-211800-
/O.CON.KLWX.WW.Y.0006.000000T0000Z-120121T1800Z/
AUGUSTA-ROCKINGHAM-NELSON-ALBEMARLE-GREENE-WESTERN HIGHLAND-
EASTERN HIGHLAND-WESTERN PENDLETON-EASTERN PENDLETON-
INCLUDING THE CITIES OF...STAUNTON...WAYNESBORO...HARRISONBURG...
CHARLOTTESVILLE...HIGHTOWN...MONTEREY...CIRCLEVILLE...FRANKLIN
1025 AM EST SAT JAN 21 2012

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...

* PRECIPITATION TYPE...FREEZING RAIN AND AREAS OF FREEZING
  DRIZZLE. RAIN AT THE HIGHER ELEVATIONS.

* ACCUMULATIONS...ADDITIONAL ICE ACCUMULATIONS OF A TRACE TO A
  COUPLE OF HUNDREDTHS...ESPECIALLY IN THE VALLEYS.

* TIMING...LINGERING FREEZING RAIN AND DRIZZLE WILL CHANGE OVER
  TO RAIN IN THE VALLEYS BY THE EARLY AFTERNOON.

* TEMPERATURES...LOWER 30S IN THE VALLEYS TO MIDDLE AND UPPER 30S
  ACROSS THE HIGHER TERRAIN.

* WINDS...NORTHWEST UP TO 5 MPH.

* IMPACTS...SLIPPERY ROADS WILL MAKE TRAVEL HAZARDOUS. LIGHT ICING
  IN THE VALLEYS IS STILL POSSIBLE ON EXPOSED SURFACES...INCLUDING
  TREES AND POWER LINES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET AND
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

DCZ001-MDZ009>011-013-014-016-VAZ027-029>031-039-040-042-050>057-
501-502-WVZ053-055-501-502-211800-
/O.CON.KLWX.WW.Y.0006.000000T0000Z-120121T1800Z/
DISTRICT OF COLUMBIA-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE-
PRINCE GEORGES-ANNE ARUNDEL-CHARLES-SHENANDOAH-PAGE-WARREN-CLARKE-
MADISON-RAPPAHANNOCK-LOUDOUN-ORANGE-CULPEPER-
PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-
ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-
KING GEORGE-NORTHERN FAUQUIER-SOUTHERN FAUQUIER-JEFFERSON-HARDY-
WESTERN GRANT-EASTERN GRANT-
INCLUDING THE CITIES OF...WASHINGTON...GAITHERSBURG...COLUMBIA...
BALTIMORE...ANNAPOLIS...WALDORF...FRONT ROYAL...LEESBURG...
CULPEPER...MANASSAS...MANASSAS PARK...FAIRFAX...ALEXANDRIA...
FALLS CHURCH...FREDERICKSBURG...WARRENTON...CHARLES TOWN...
MOOREFIELD...BAYARD...MOUNT STORM...PETERSBURG
1025 AM EST SAT JAN 21 2012

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...

* PRECIPITATION TYPE...FREEZING RAIN AND AREAS OF FREEZING DRIZZLE.

* ACCUMULATIONS...ADDITIONAL TRACE AMOUNTS OF ICING.

* TIMING...FREEZING RAIN AND DRIZZLE WILL TAPER OFF BY EARLY
  AFTERNOON.

* TEMPERATURES...IN THE LOWER 30S.

* WINDS...NORTH 5 TO 10 MPH.

* IMPACTS...SLIPPERY ROADS WILL MAKE TRAVEL HAZARDOUS. LIGHT ICING
  IS STILL POSSIBLE ON EXPOSED SURFACES...INCLUDING TREES AND POWER LINES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET AND
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

MDZ017-018-211800-
/O.CON.KLWX.WW.Y.0006.000000T0000Z-120121T1800Z/
ST. MARYS-CALVERT-
INCLUDING THE CITY OF...ST MARYS CITY
1025 AM EST SAT JAN 21 2012

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...

* PRECIPITATION TYPE...RAIN MIXING WITH FREEZING RAIN. PATCHY
  FREEZING DRIZZLE.

* ACCUMULATIONS...ADDITIONAL TRACE AMOUNTS OF ICING...ESPECIALLY
  AWAY FROM THE WATER.

* TIMING...FREEZING RAIN AND DRIZZLE WILL CONTINUE TO CHANGE OVER
  TO ALL RAIN THROUGH THE REMAINDER OF THE MORNING. 

* TEMPERATURES...LOWER 30S INLAND TO UPPER 30S NEAR THE WATER.

* WINDS...NORTHWEST 5 TO 10 MPH.

* IMPACTS...SLIPPERY ROADS WILL MAKE TRAVEL HAZARDOUS. LIGHT ICING
  IS STILL POSSIBLE ON EXPOSED SURFACES...INCLUDING TREES AND POWER LINES.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET AND
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

MDZ004>007-211800-
/O.CON.KLWX.WW.Y.0006.000000T0000Z-120121T1800Z/
FREDERICK MD-CARROLL-NORTHERN BALTIMORE-HARFORD-
INCLUDING THE CITIES OF...FREDERICK...WESTMINSTER
1025 AM EST SAT JAN 21 2012

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 1 PM EST THIS
AFTERNOON...

* PRECIPITATION TYPE...FREEZING RAIN AND FREEZING DRIZZLE.

* ACCUMULATIONS...ADDITIONAL ICING OF A COUPLE OF HUNDREDTHS.

* TIMING...FREEZING RAIN AND DRIZZLE WILL CONTINUE TO TAPER OFF
  THROUGH THE EARLY AFTERNOON.

* TEMPERATURES...AROUND 30.

* WINDS...NORTH 5 TO 10 MPH.

* IMPACTS...SLIPPERY ROADS WILL MAKE TRAVEL HAZARDOUS. LIGHT ICING
  IS STILL POSSIBLE ON EXPOSED SURFACES...INCLUDING TREES AND POWER LINES. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET AND
FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR
SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.

&&

$$

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
1005 PM EST FRI JAN 20 2012

.SYNOPSIS...
LOW PRESSURE WILL BRING A WINTRY MIX OF PRECIPITATION TO MID
ATLANTIC REGION OVERNIGHT AND SATURDAY...FOLLOWED BY A COLD FRONT
SATURDAY NIGHT. HIGH PRESSURE WILL BUILD IN FROM THE NORTH SUNDAY
INTO EARLY MONDAY...WITH LOW PRESSURE PASSING TO THE SOUTH. A SECOND
COLD FRONT WILL MOVE ACROSS THE REGION MONDAY NIGHT INTO TUESDAY.

&&

.NEAR TERM /THROUGH SATURDAY/...
SFC HIPRES OVR NY/VT THIS EVNG...XTNDG SWD TO THE DELMARVA.
MEANWHILE...LOPRES IN THE TN VLY SET TO MV NEWD. AMS ACRS CWFA
VERY DRY...SPCLY NRN 2/3RDS. LWX 00Z RAOB SUPPORTS ALL SNOW...BUT
RNK RAOB HINTS AT WHATS TO COME. PCPN TO MRB-IAD-EZF...ALL AS SNW.
FCST UPDTD AT 10PM TO REFLECT MORE SNW AND LESS ICE. REST SAME...

PREV...
LTST GDNC STILL PTS TO THE SFC LOW PASSING OVR THE XTRM SRN CWFA
/OR JUST TO THE S/. COLD AIR WL BE ABLE TO DRAIN SWD DOWN THE
COAST...ENHANCED BY EVAP OF INIT PCPN. MEANWHILE...H8 WAA WL
RESULT IN A WARM AIR INTRUSION...RESULTING IN PTYPE OF SN...THEN
SN/PL...MIXING WITH AND EVENTUALLY CHGG TO FZRA. N-CENTRL AND NERN
MD REMAIN THE COLDEST...SUGGESTING SNW WL BE MORE PROLONGED AND
ICE MORE LMTD IN THOSE LOCATIONS. LTL CHG FM PRVS ACCUM FCST...
MOST LOCATIONS SEEING AN INCH OR TWO OF SNOW... BUT ARND 3 INCHES
ACRS THE N.

BY 12Z SAT...FZRA WL BE THE MOST PREVALENT PTYPE...W/ TEMPS NEAR
32F /RA/ SRN FRINGE OF CWFA /WAA WORKING TO SFC/ AND PL HANGING
ON ACRS NRN MD AND IN THE NRN SHEN VLY/PTMC HIGHLANDS...THX TO CAD.
WARM AIR WL BE WORKING NW DURING THE DAY SAT WHILE PCPN PUSHES SE.
ICE ACCUMULATIONS ARND A TENTH-INCH...HIGHER NW.

LTST GDNC SUGGESTING SOMEWHERE IN THE NWRN/WRN CWFA MOST AT RISK
FOR BIG ICE ACCUMS. TEMPS/DEWPTS ALNG/W OF THE APPALACHIANS AS
WELL AS THE NOSE OF H8 TEMPS SUGGESTS THE MTN RDGS MOST AT RISK.
WL BE FCSTG UP TO TWO-TENTHS FOR THE NRN SHEN VLY/PTMC HIGHLANDS.

AT THIS POINT...BIGGEST UNCERTAINTY REMAINS HOW MUCH OF EACH PTYPE
WL FALL...AS WELL AS IF ACCRETION WL BE SUFFICIENT. FOR ONE
THING...WRF GDNC /BACKED BY HRRR/ CONSISTENTLY SUGGESTING PCPN
MAY COME IN TWO DISTINCT PDS-- FIRST W/ THE H8 WAA /THRU ABT
08Z/...THEN A RESPITE/LULL THRU DAWN WHEN A PD TRIGGERED BY PVA WL
ARRIVE. WL HOLD ONTO HEADLINES AS IS FOR NOW. QPF LOOKS TO BE
HIEST IN FAR NWRN CORNER FO CWFA. WL CONT TO MONITOR...AND UPGRADE
IF/WHEN REQD.

&&

.SHORT TERM /SATURDAY NIGHT THROUGH SUNDAY NIGHT/...
HIGH PRESSURE WILL REMAIN OVER EASTERN CANADA SATURDAY NIGHT THROUGH
SUNDAY NIGHT. THE SURFACE RIDGE AXIS WILL DIVE SOUTH FROM THE HIGH
THROUGH THE MID-ATLANTIC...KEEPING LOW-LEVEL COLD AIR IN PLACE.

A STORM SYSTEM WILL DEVELOP EAST OF THE ROCKIES SATURDAY NIGHT BEFORE
TRACKING TOWARD THE GREAT LAKES SUNDAY INTO SUNDAY NIGHT. THE STORM
SYSTEM WILL REMAIN WELL TO OUR WEST...BUT ISENTROPIC LIFT WILL
INCREASE AS THE STORM SYSTEM APPROACHES THE REGION. DRY AND CHILLY
CONDITIONS ARE EXPECTED SATURDAY NIGHT...BUT THE INCREASED
ISENTROPIC LIFT WILL ALLOW FOR PLENTY OF CLOUD COVER SUNDAY THROUGH
SUNDAY NIGHT ALONG WITH AREAS OF LIGHT RAIN AND DRIZZLE. THE BEST
CHANCE FOR PRECIPITATION WILL BE LATER SUNDAY AFTERNOON INTO SUNDAY
NIGHT. THERE WILL BE ENOUGH COLD AIR FOR THE POTENTIAL OF FREEZING
RAIN AND FREEZING DRIZZLE. THE BEST CHANCE FOR FROZEN PRECIPITATION
WILL NEAR AND TO THE NORTH AND WEST OF WASHINGTON/BALTIMORE.

MIN TEMPS SATURDAY NIGHT WILL RANGE FROM THE LOWER 20S NEAR THE
MASON DIXON LINE TO THE LOWER 30S ACROSS CENTRAL VIRGINIA. MAX TEMPS
SUNDAY WILL BE IN THE LOWER TO MIDDLE 30S ACROSS MOST LOCATIONS.
TEMPERATURES WILL REMAIN NEARLY STEADY SUNDAY NIGHT.

&&

.LONG TERM /MONDAY THROUGH FRIDAY/...
LOW PRESSURE WILL TRACK THROUGH EASTERN CANADA MONDAY INTO MONDAY
NIGHT. THE COLD FRONT ASSOCIATED WITH THE LOW IS EXPECTED TO PASS
THROUGH THE MID-ATLANTIC MONDAY NIGHT. SHOWERS ARE EXPECTED ALONG
AND AHEAD OF THE FRONT MONDAY INTO MONDAY EVENING. A SOUTHERLY FLOW
AHEAD OF THE FRONT WILL ALLOW FOR WARMER TEMPERATURES
MONDAY...KEEPING ANY PRECIPITATION IN THE FORM OF RAIN.

HIGH PRESSURE WILL BUILD IN BEHIND THE FRONT LATER MONDAY NIGHT
THROUGH THE MIDDLE PORTION OF NEXT WEEK. DRY AND SEASONABLE
CONDITIONS ARE EXPECTED. THE NEXT STORM SYSTEM MAY IMPACT THE REGION
THURSDAY INTO FRIDAY.

&&

.AVIATION /03Z SATURDAY THROUGH WEDNESDAY/...
EXPECT CIGS AND VISIBILITIES TO DROP TO IFR LEVELS BY 06Z ACROSS
AREA TERMINALS. REPORTS OF ICE PELLETS IN CHO INDICATE A MID-LEVEL
WARM AIR INTRUSION IS TAKING PLACE SO EXPECT A CHANGE OVER TO
FREEZING RAIN FOR THEM SHORTLY AFTER MIDNIGHT. ELSEWHERE...LIGHT
SNOW WILL BEGIN FALLING IN THE NEXT SEVERAL HOURS. THIS WILL MIX
WITH ICE PELLETS AND CHANGE TO FREEZING RAIN BY SUNRISE SATURDAY
MORNING. A CHANGE OVER TO ALL RAIN IS EXPECTED IN THE LATE MORNING
HOURS FOR ALL TERMINALS EXCEPT MRB...WHICH WILL SEE FREEZING RAIN
THROUGH THE EARLY AFTERNOON HOURS. VISIBILITIES WILL BEGIN IMPROVING
TO MVFR LEVELS SAT AFTERNOON. ONSHORE FLOW INTO TOMORROW EVENING
WILL KEEP CIGS AT MVFR LEVELS THROUGH THE TAF VALID PERIOD.

HIGH PRESSURE WILL REMAIN OVER THE TERMINALS SATURDAY NIGHT
THROUGH SUNDAY NIGHT. HOWEVER...MOISTURE WILL REMAIN TRAPPED
UNDERNEATH THE SUBSIDENCE INVERSION. THERE MAY BE ENOUGH DRY AIR
FOR A BREAK IN CIGS/VSBYS SATURDAY NIGHT ESPECIALLY ACROSS THE
NORTHERN TERMINALS. HOWEVER...ANY BREAKS IN CLOUD COVER WILL
QUICKLY FILL IN SUNDAY/SUNDAY NIGHT WITH IFR CONDITIONS EXPECTED.
AREAS OF LIGHT RAIN AND DRIZZLE ARE EXPECTED TO DEVELOP LATER
SUNDAY THROUGH SUNDAY NIGHT. TEMPERATURES WILL BE NEAR FREEZING SO
FREEZING RAIN/DRIZZLE IS POSSIBLE.

A COLD FRONT WILL PASS THROUGH THE TERMINALS LATE MONDAY. HIGH
PRESSURE WILL BUILD TOWARD THE TERMINALS TUESDAY.

&&

.MARINE...
SCA IN EFFECT MID BAY/LWR PTMC FOR GUSTS AROUND 20 KT. IF IT
OCCURS... IT/LL BE A THRESHOLD EVENT.

SMALL CRAFT CONDITIONS ARE EXPECTED AGAIN LATE SATURDAY AFTERNOON
AND NIGHT AS NORTHERLY WINDS SURGE DOWN THE BAY. THAT/LL BE A HIER
CONFIDENCE EVENT.

HIGH PRESSURE WILL REMAIN OVER THE WATERS SUNDAY THROUGH SUNDAY
NIGHT. A SMALL CRAFT ADVISORY MAY BE NEEDED FOR THE LOWER TIDAL
POTOMAC RIVER AND MIDDLE PORTION OF THE BAY SUNDAY MORNING.

A COLD FRONT WILL APPROACH THE WATERS MONDAY BEFORE PASSING THROUGH
MONDAY NIGHT. A SMALL CRAFT ADVISORY WILL LIKELY BE NEEDED FOR
PORTIONS OF THE WATERS BOTH AHEAD OF THE FRONT MONDAY AND BEHIND THE
FRONT MONDAY NIGHT/TUESDAY.

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
DC...WINTER WEATHER ADVISORY UNTIL 1 PM EST SATURDAY FOR DCZ001.
MD...WINTER WEATHER ADVISORY UNTIL 1 PM EST SATURDAY FOR MDZ003>007-
     009>011-013-014-016>018-501-502.
VA...WINTER WEATHER ADVISORY UNTIL 1 PM EST SATURDAY FOR VAZ025-026-
     029-036>040-050-051-503-504.
     WINTER WEATHER ADVISORY UNTIL 1 PM EST SATURDAY FOR VAZ027-028-
     030-031-042-052>057-501-502.
WV...WINTER WEATHER ADVISORY UNTIL 1 PM EST SATURDAY FOR WVZ505-506.
     WINTER WEATHER ADVISORY UNTIL 1 PM EST SATURDAY FOR WVZ050>053-
     055-501>504.
MARINE...SMALL CRAFT ADVISORY FROM 4 PM TO 11 PM EST SATURDAY FOR
     ANZ530>532-535-536-538>540.
     SMALL CRAFT ADVISORY FROM 4 PM SATURDAY TO 6 AM EST SUNDAY FOR
     ANZ533-534-537-541>543.
     SMALL CRAFT ADVISORY UNTIL 10 AM EST SATURDAY FOR ANZ533-534-
     537-543.

&&

SYNOPSIS...
NEAR TERM...HTS
SHORT TERM...LASORSA
LONG TERM...LASORSA
AVIATION...LARSEN/LASORSA
MARINE...HTS/LISTEMAA/LASORSA

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
240 PM EST FRI JAN 20 2012

ANZ530>543-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057-
211000-
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-
240 PM EST FRI JAN 20 2012

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...THIS AFTERNOON AND TONIGHT

A WINTER WEATHER ADVISORY HAS BEEN ISSUED FOR THE OUTLOOK AREA
OVERNIGHT. A WINTRY MIX OF SNOW...SLEET AND FREEZING RAIN IS
EXPECTED TO IMPACT THE MID ATLANTIC REGION. SEE WBCWSWLWX FOR
FURTHER DETAILS.

A SMALL CRAFT ADVISORY HAS BEEN ISSUED FOR PORTIONS OF THE
MARYLAND CHESAPEAKE BAY AND LOWER TIDAL POTOMAC OVERNIGHT.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

THE WINTER WEATHER ADVISORY REMAINS IN EFFECT THROUGH 1 PM SATURDAY.

THERE IS THE POTENTIAL ON SUNDAY AND SUNDAY NIGHT FOR A WINTRY
MIX ACROSS PORTIONS OF THE OUTLOOK AREA.

SMALL CRAFT CONDITIONS WILL CONTINUE ACROSS PORTIONS OF THE
MARYLAND CHESAPEAKE BAY AND LOWER TIDAL POTOMAC SATURDAY MORNING
AND THEN AGAIN OVERNIGHT INTO SUNDAY MORNING.

SMALL CRAFT CONDITIONS ARE POSSIBLE MONDAY THROUGH TUESDAY FOR
PORTIONS OF THE WATERS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

MDZ003>005-009-010-501-502-VAZ025>031-036>040-042-050-051-501>504-
WVZ050>053-055-501>506-211000-
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-
240 PM EST FRI JAN 20 2012

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...THIS AFTERNOON AND TONIGHT

A WINTER WEATHER ADVISORY HAS BEEN ISSUED FOR THE OUTLOOK AREA
OVERNIGHT. A WINTRY MIX OF SNOW...SLEET AND FREEZING RAIN IS
EXPECTED TO IMPACT THE MID ATLANTIC REGION. SEE WBCWSWLWX FOR
FURTHER DETAILS.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

A WINTER WEATHER ADVISORY REMAINS IN EFFECT THROUGH 1 PM ON
SATURDAY.

THERE IS THE POTENTIAL ON SUNDAY AND SUNDAY NIGHT FOR A WINTRY
MIX ACROSS PORTIONS OF THE OUTLOOK AREA.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.