Flash Flood Warning 57, NWS Baltimore/Washington

072 
WGUS71 KLWX 261247
FFSLWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
847 AM EDT SUN AUG 26 2012

MDC005-510-261430-
/O.CON.KLWX.FF.W.0057.000000T0000Z-120826T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BALTIMORE MD-BALTIMORE CITY MD-
847 AM EDT SUN AUG 26 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 AM EDT FOR
BALTIMORE CITY AND SOUTHERN BALTIMORE COUNTIES...

AT 841 AM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED VERY
HEAVY RAIN CAPABLE OF PRODUCING FLASH FLOODING. RADAR ESTIMATES THAT 
UP TO 2 TO 3 INCHES OF RAIN HAVE ALREADY FALLEN ACROSS PORTIONS OF 
THE WARNED AREA. ADDITIONAL RAINFALL AMOUNTS A HALF INCH TO ONE INCH 
CAN BE EXPECTED.

  LOCATIONS IN THE WARNING INCLUDE MUCH OF THE CITY OF BALTIMORE AND 
  THE IMMEDIATE NORTHERN AND EASTERN SUBURBS.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLASH FLOODING OF
SMALL CREEKS AND STREAMS...URBAN AREAS...HIGHWAYS...STREETS...
UNDERPASSES AND OTHER DRAINAGE AREAS AND LOW LYING SPOTS.

TO REPORT FLASH FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
STERLING VIRGINIA.

LAT...LON 3939 7641 3929 7637 3929 7638 3928 7637
      3922 7641 3923 7654 3925 7655 3924 7656
      3928 7671 3946 7684 3952 7657

$$

GMS

792 
WGUS71 KLWX 261333
FFSLWX

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
933 AM EDT SUN AUG 26 2012

MDC005-510-261343-
/O.CAN.KLWX.FF.W.0057.000000T0000Z-120826T1430Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BALTIMORE MD-BALTIMORE CITY MD-
933 AM EDT SUN AUG 26 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR BALTIMORE CITY AND
SOUTHERN BALTIMORE COUNTIES...

RAIN HAS DIMINISHED...THEREFORE THE FLASH FLOOD WARNING HAS BEEN
CANCELLED.

LAT...LON 3939 7641 3929 7637 3929 7638 3928 7637
      3922 7641 3923 7654 3925 7655 3924 7656
      3928 7671 3946 7684 3952 7657

$$

GMS

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
521 AM EDT SUN AUG 26 2012

.SYNOPSIS...
LOW PRESSURE WILL REMAIN WEAKEN OVER THE REGION TODAY BEFORE MOVING
OFF TO THE EAST TONIGHT. A COLD FRONT WILL APPROACH FROM THE
NORTHWEST LATE MONDAY BEFORE PASSING THROUGH TUESDAY. THE BOUNDARY
WILL STALL OUT TO OUR SOUTH DURING THE MIDDLE PORTION OF THE WEEK.

&&

.NEAR TERM /THROUGH TONIGHT/...
BROAD AREA OF LOW PRESSURE ALOFT AND AT THE SURFACE IS LOCATED
ACROSS SOUTH CENTRAL VA. BOTH AREAS OF LOW PRESSURE WILL DRIFT
NORTHWARD TODAY AND WEAKEN.

REGIONAL RADAR SHOWS SCT/NMRS SHOWERS ACROSS THE CWFA ROTATING
AROUND THE NORTHERN SIDE OF BOTH LOWS. SHOWERS WILL CONTINUE FOR
MOST OF THE DAY...BUT BEGIN DECREASING FROM SOUTH TO NORTH LATER
THIS AFTERNOON AND EVENING.

&&

.SHORT TERM /MONDAY THROUGH MONDAY NIGHT/...
SURFACE HIGH PRESSURE WILL REMAIN OVER THE ATLANTIC WHILE A COLD
FRONT APPROACHES THE AREA MONDAY FROM THE OHIO VALLEY. A SOUTHERLY
FLOW IN BETWEEN THESE SYSTEMS WILL USHER IN WARM AND HUMID
CONDITIONS MONDAY. MAX TEMPS WILL RANGE FROM THE 70S IN THE
MOUNTAINS TO THE MID AND UPPER 80S ACROSS MOST OTHER LOCATIONS.

MOISTURE FROM THE ATLANTIC WILL COMBINE WITH SURFACE HEATING FOR
LIMITED INSTABILITY...CAUSING POSSIBLE SHOWERS AND T-STORMS. THE
BEST CHANCE FOR T-STORMS WILL BE ACROSS NORTHERN MARYLAND AND FOR
LOCATIONS EAST OF THE BLUE RIDGE MOUNTAINS WHERE THERE WILL BE A
LITTLE MORE INSTABILITY. EVEN ACROSS THESE AREAS...MUCH OF THE TIME
WILL TURN OUT DRY.

THE COLD FRONT WILL MOVE INTO THE AREA MONDAY NIGHT. SHOWERS AND
T-STORMS ARE POSSIBLE ALONG AND AHEAD OF THE FRONT...ESPECIALLY
ACROSS NORTHERN MARYLAND. WARM AND HUMID CONDITIONS WILL PERSIST
MONDAY NIGHT WITH MIN TEMPS RANGING FROM THE MID 60S IN THE
SHENANDOAH VALLEY TO THE LOWER AND MIDDLE 70S IN
WASHINGTON/BALTIMORE.

&&

.LONG TERM /TUESDAY THROUGH SATURDAY/...
THE COLD FRONT WILL PASS THROUGH THE AREA TUESDAY. SHOWERS AND
THUNDERSTORMS ARE POSSIBLE...ESPECIALLY DURING THE AFTERNOON AND
EVENING. THE BOUNDARY WILL STALL OUT TO THE SOUTH FOR WEDNESDAY AND
THURSDAY. MOST AREAS SHOULD TURN OUT DRY DURING THIS TIME. WILL
CONTINUE WITH A SLIGHT CHANCE FOR SHOWERS ACROSS SOUTHERN PORTIONS
OF THE CWA...CLOSER TO THE BOUNDARY. HOWEVER...LATEST GUIDANCE
SUGGESTS THAT EVEN THESE AREAS WILL TURN OUT DRY.

HAVE NOT MADE ANY CHANGES TO THE FORECAST FOR LATE IN THE WEEK INTO
NEXT WEEKEND. THERE IS STILL A HIGH DEGREE OF UNCERTAINTY DURING
THIS TIME...DUE TO THE REMNANTS OF ISAAC.

&&

.AVIATION /09Z SUNDAY THROUGH THURSDAY/...
LIFR CIGS HAVE DEVELOPED AT KCHO THIS MORNING AND SHOULD CONTINUE
FOR THE EARLY MORNING HOURS WITH A GRADUAL IMPROVEMENT AFTER
SUNRISE. SOME IFR CIGS ARE POSSIBLE AT KMRB AND KIAD AFTER 10Z THIS
MORNING GRADUALLY IMPROVING AFTER SUNRISE. SKIES WILL REMAIN CLOUDY
FOR MOST OF THE DAY...BUT VALUES THIS AFTERNOON ARE EXPECTED VFR.
SOME LOWER CIGS/PATCHY FOG IS POSSIBLE OVERNIGHT AGAIN.

SCATTERED SHOWERS POSSIBLE AT TERMINAL SITES TODAY AS LOW PRESSURE
MOVES OVERHEAD.

LOW CLOUDS AND FOG WILL CAUSE MVFR/IFR CIGS/VSBYS EARLY MONDAY
MORNING. CIGS/VSBYS WILL IMPROVE BY MONDAY AFTERNOON.
ISOLATED/SCATTERED T-STORMS ARE POSSIBLE IN THE AFTERNOON ESPECIALLY
ACROSS THE EASTERN TERMINALS.

A COLD FRONT WILL PASS THROUGH THE TERMINALS MONDAY NIGHT AND
TUESDAY. MORE SHOWERS AND T-STORMS ARE POSSIBLE...ESPECIALLY
TUESDAY. THE BOUNDARY WILL STALL TO THE SOUTH FOR THE MIDDLE PORTION
OF THE WEEK AND AND VFR CONDITIONS ARE EXPECTED.

&&

.MARINE...
A RETURN FLOW IS EXPECTED AROUND HIGH PRESSURE OVER THE ATLANTIC
OCEAN MONDAY THROUGH MONDAY NIGHT. WIND GUSTS WILL BE CLOSE TO SCA
CRITERIA. HAVE CAPPED GUSTS AROUND 15 KNOTS FOR NOW DUE TO THE
RELATIVELY COOLER WATERS. ISOLATED/SCATTERED T-STORMS ARE POSSIBLE
DUE TO LIMITED INSTABILITY.

A COLD FRONT WILL APPROACH THE WATERS MONDAY NIGHT BEFORE PASSING
THROUGH TUESDAY. MORE SHOWERS AND T-STORMS ARE POSSIBLE. T-STORMS
TUESDAY MAY CONTAIN GUSTY WINDS. THE BOUNDARY WILL STALL TO THE
SOUTH OF THE WATERS FOR WEDNESDAY AND THURSDAY.

&&

.TIDES/COASTAL FLOODING...
AN ONSHORE FLOW HAS CAUSED TIDAL ANOMALIES TO BE AROUND THREE
QUARTERS OF A FOOT ABOVE NORMAL EARLY THIS MORNING. WATER LEVELS
WERE NEAR THRESHOLDS FOR MINOR COASTAL FLOODING...BUT WATER LEVELS
HAVE DECREASED WITH LOW TIDE APPROACHING. TIDAL ANOMALIES WILL
LIKELY INCREASE TO NEAR ONE FOOT ABOVE NORMAL TODAY AS THE FLOW
TURNS TO THE SOUTHEAST. HOWEVER...THE HIGH TIDE THIS AFTERNOON
WILL BE THE LOWER OF THE TWO. THEREFORE...A COASTAL FLOOD
ADVISORY HAS NOT BEEN ISSUED AT THIS TIME. THE SOUTHEAST FLOW WILL
CONTINUE TONIGHT. SINCE THE HIGH TIDE TONIGHT WILL BE THE HIGHER
OF THE TWO...MINOR FLOODING IS POSSIBLE.

&&

.LWX WATCHES/WARNINGS/ADVISORIES...
DC...NONE.
MD...NONE.
VA...NONE.
WV...NONE.
MARINE...SMALL CRAFT ADVISORY UNTIL 11 AM EDT THIS MORNING FOR
     ANZ530>543.

&&

LISTEMAA/LASORSA

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
529 AM EDT SUN AUG 26 2012

ANZ530>543-DCZ001-MDZ006-007-011-013-014-016>018-VAZ052>057-
271000-
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-
529 AM EDT SUN AUG 26 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...TODAY AND TONIGHT

THUNDERSTORMS WILL CONTAIN HEAVY DOWNPOURS WHICH MAY LEAD TO
LOCALIZED FLASH FLOODING TODAY INTO TONIGHT. AN ISOLATED
THUNDERSTORM WILL BE CAPABLE OF PRODUCING DAMAGING WINDS...MAINLY
THIS AFTERNOON AND EVENING.

A SMALL CRAFT ADVISORY IS IN EFFECT UNTIL 11 AM FOR THE WATERS.

MINOR COASTAL FLOODING IS POSSIBLE NEAR TIMES OF HIGH TIDE LATER
THIS AFTERNOON THROUGH TONIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.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>506-271000-
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-
529 AM EDT SUN AUG 26 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...TODAY AND TONIGHT

THUNDERSTORMS WILL CONTAIN HEAVY DOWNPOURS THIS AFTERNOON AND
EVENING...WHICH COULD LEAD TO LOCALIZED FLASH FLOODING.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
537 AM EDT SUN AUG 26 2012

MDZ014-018-261000-
ANNE ARUNDEL MD-CALVERT MD-
537 AM EDT SUN AUG 26 2012

...STRONG THUNDERSTORM TO AFFECT ANNE ARUNDEL AND CALVERT COUNTIES...

AT 536 AM EDT...A STRONG THUNDERSTORM WAS LOCATED OVER BREEZY
POINT...MOVING NORTH AT 15 MPH.

LOCATIONS IMPACTED INCLUDE CHESAPEAKE BEACH...NORTH BEACH AND SHADY
SIDE.

HEAVY RAIN WITH THIS STORM WILL REDUCE VISIBILITIES TO BELOW ONE MILE
AND MAY CAUSE PONDING OF WATER ON ROADWAYS. LOCALIZED RAINFALL
AMOUNTS UP TO TWO INCHES ARE EXPECTED WITH THIS STORM.

&&

LAT...LON 3899 7644 3897 7646 3895 7644 3891 7645
      3887 7650 3884 7648 3876 7652 3855 7650
      3853 7651 3851 7659 3886 7669 3891 7667
      3899 7671 3907 7643 3898 7642
TIME...MOT...LOC 0936Z 161DEG 15KT 3863 7652

BJL

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
620 AM EDT SUN AUG 26 2012

MDZ006-010-011-013-014-261100-
SOUTHERN BALTIMORE MD-NORTHERN BALTIMORE MD-PRINCE GEORGES MD-
ANNE ARUNDEL MD-HOWARD MD-
620 AM EDT SUN AUG 26 2012

...SHOWERS AND ISOLATED THUNDERSTORMS TO AFFECT SOUTHERN
BALTIMORE...NORTHERN BALTIMORE...PRINCE GEORGES...ANNE ARUNDEL AND
HOWARD COUNTIES...

AT 619 AM EDT...SHOWERS AND THUNDERSTORMS WERE LOCATED OVER THE
AREA...MOVING NORTH AT 25 MPH.

LOCATIONS IMPACTED INCLUDE MORRELL PARK...LANSDOWNE...M AND T
STADIUM...BALTIMORE INNER HARBOR...UNION SQUARE...GWYNNS FALLS...
CARROLL...BOLTON HILL...DRUID HILLS PARK AND GWYNN OAK.

HEAVY RAIN ASSOCIATED WILL REDUCE VISIBILITIES TO BELOW ONE MILE AND
MAY CAUSE PONDING OF WATER ON ROADWAYS. LOCALIZED RAINFALL AMOUNTS
OVER AN INCH ARE EXPECTED.

&&

LAT...LON 3923 7646 3920 7647 3922 7652 3920 7652
      3914 7644 3900 7640 3897 7646 3891 7645
      3887 7650 3884 7648 3875 7662 3916 7685
      3935 7691 3935 7688 3942 7687 3943 7690
      3949 7653
TIME...MOT...LOC 1019Z 168DEG 23KT 3922 7663

BJL

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC
732 AM EDT SUN AUG 26 2012

MDZ005-006-011-261245-
CARROLL MD-SOUTHERN BALTIMORE MD-NORTHERN BALTIMORE MD-
732 AM EDT SUN AUG 26 2012

...SHOWERS AND ISOLATED THUNDERSTORMS WITH HEAVY RAIN TO AFFECT
CARROLL AND BALTIMORE COUNTIES...

AT 730 AM EDT...SHOWERS AND ISOLATED THUNDERSTORMS PRODUCING HEAVY
RAIN WERE LOCATED ALONG A LINE EXTENDING FROM LOCHEARN TO ARMISTEAD
GARDENS...MOVING NORTHWEST AT 15 MPH.

LOCATIONS IMPACTED INCLUDE...MUCH OF THE CITY OF BALTIMORE AND THE
NORTHERN SUBURBS...INCLUDING...PIMLICO...FULLERTON...OWINGS
MILLS...PERRY HALL AND PARKVILLE.

HEAVY RAIN ASSOCIATED WILL REDUCE VISIBILITIES TO BELOW ONE MILE AND
MAY CAUSE PONDING OF WATER ON ROADWAYS. LOCALIZED RAINFALL AMOUNTS
OVER AN INCH ARE EXPECTED.

&&

LAT...LON 3960 7701 3964 7662 3946 7649 3924 7642
      3933 7680
TIME...MOT...LOC 1130Z 152DEG 13KT 3937 7674 3932 7656

GMS