Special Weather Statement, NWS Philadelphia/Mount Holly

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
634 PM EDT MON MAY 19 2014

.SYNOPSIS...
HIGH PRESSURE OVER THE MID ATLANTIC STATES SETTLES SOUTH ON
TUESDAY. LOW PRESSURE OVER THE UPPER GREAT LAKES WEDNESDAY SENDS A
WARM FRONT EASTWARD TO NEW JERSEY WEDNESDAY NIGHT WHERE A NEW AREA
OF LOW PRESSURE FORMS. THEN A COLD FRONT CROSSES THE AREA
THURSDAY. HIGH PRESSURE SLOWLY FOLLOWS FROM THE MIDWEST...REACHING
BERMUDA BY EARLY NEXT WEEK.

&&

.NEAR TERM /UNTIL 6 AM TUESDAY MORNING/...
A MID LEVEL LOW WAS LOCATED OVER THE CAPE COD VICINITY EARLY THIS
EVENING. THE FEATURE WILL CONTINUE TO DRIFT SOUTHEASTWARD AND OUT
TO SEA.

THE COMBINATION OF COOL AIR ALOFT AND AN IMPULSE ROTATING AROUND
THE MID LEVEL LOW WAS MAINTAINING SCATTERED SHOWERS IN OUR REGION
AT 600 PM. THE MAIN AREA OF SHOWERS EXTENDED FROM THE LEHIGH
VALLEY EASTWARD TO THE NORTHERN PART OF THE JERSEY SHORE. THERE
WERE ADDITIONAL SHOWERS OVER THE POCONOS. RAINFALL AMOUNTS WILL
CONTINUE TO BE LIMITED TO A FEW HUNDREDTHS OF AN INCH AS THE
SHOWERS SLIDE SOUTHEASTWARD. THE RAIN SHOWERS AND THE ALTOCUMULUS
ASSOCIATED WITH THEM WILL DISSIPATE GRADUALLY DURING THE EVENING
HOURS WITH THE LOSS OF DAYTIME HEATING.

ALSO, THE GUSTY WIND SHOULD SUBSIDE WITH THE LOSS OF DAYTIME
HEATING. LAPSE RATES WERE QUITE STEEP THIS AFTERNOON DUE TO THE
HEATING AND DRY AIR AT THE SURFACE AND THE CHILLY AIR ALOFT.

TEMPERATURES ARE EXPECTED TO DROP INTO THE 40S IN MUCH OF OUR
REGION LATE TONIGHT WITH A MAINLY CLEAR SKY AND A RELATIVELY LIGHT
WIND. MINIMUM READINGS ARE EXPECTED TO BE IN THE LOWER 50S IN
URBAN AREAS AND ALONG THE IMMEDIATE COAST.

&&

.SHORT TERM /6 AM TUESDAY MORNING THROUGH 6 PM TUESDAY/...
THE HIGH PRESSURE AFFECTING THE AREA THE LAST COUPLE OF DAYS WILL
BEGIN SINKING TO OUR SOUTH ON TUESDAY, WHILE THE CUTOFF MID/UPPER
LOW WILL REMAIN TO OUR NORTHEAST. THE SURFACE FLOW WILL BECOME
MORE WESTERLY, WHILE THE FLOW ALOFT REMAINS NORTHWESTERLY. WE DO
NOT EXPECT ANY PRECIPITATION AS THE AIR MASS WILL DRY OUT SOME,
ALTHOUGH AN INCREASE IN CLOUD COVER CAN BE EXPECTED LATER IN THE
DAY. WE USED A MAV/MET MOS AND MOSGUIDE BLEND FOR DAYTIME HIGHS AS
THEY REMAIN FAIRLY SIMILAR WHICH GIVES TEMPERATURES A FEW DEGREES
ABOVE NORMAL IN MOST PLACES.

&&

.LONG TERM /TUESDAY NIGHT THROUGH MONDAY/...
OVERALL A QUIET PERIOD WITH 12Z/19 GFS 2M TEMPS A GOOD PREDICTOR.
SEVERAL PERIODS OF SHOWERS BUT OVERALL IT SEEMS TO BE DECENT
WEATHER.

500MB: A SMALL CLOSED LOW IN SOUTH CENTRAL CANADA TUESDAY NIGHT
EVOLVES INTO A LARGER CLOSED LOW SITUATED OVER NEW ENGLAND BY
FRIDAY THEN RIDGING IN THE MIDWEST SLOWLY EDGES EAST BY EARLY NEXT
WEEK.

TEMPERATURES: THE FIRST 18 DAYS OF THE MONTH HAVE AVERAGED
GENERALLY 2 TO 4 DEGREES ABOVE NORMAL. CALENDAR DAY AVERAGE
TEMPERATURES IN THIS UPCOMING LONG TERM FORECAST PERIOD SHOULD BE
WITHIN SEVERAL DEGREES OF NORMAL WITH THE COOLEST DAYS SLATED FOR
FRIDAY AND SATURDAY.

FORECAST BASIS...UNLESS OTHERWISE NOTED THE LONG TERM PERIOD OF
THIS FORECAST IS GENERALLY BASED ON A 50 50 BLEND OF THE 12Z/19
NAM/GFS MOS FOR THE PERIOD TUESDAY NIGHT-WEDNESDAY NIGHT... THE
12Z/19 GFS MOS FOR THURSDAY AND THURSDAY NIGHT AND THEN THEREAFTER
THE 1522Z/19 WPC GRIDDED GUIDANCE. THIS GUIDANCE IS CHECKED
AGAINST THE 09Z/19 SREF POPS FOR .01 IN 3 HRS THROUGH THURSDAY AND
THEREAFTER THE 12Z/19 GEFS 6HR POPS FOR .05. ADDITIONALLY...WE
MAKE A SPOT CHECK OF THE 12Z/19 OPERATIONAL GFS 2M TEMPS VS THE
GEFS AND SEE WHERE UNCERTAINTY (SPREAD IN SOLUTIONS) EXISTS AND
REFERENCE THAT UNCERTAINTY WITH RESPECT TO PROSPECTS FOR THE GFS
MOS BEING ACCURATE. THE 12Z GGEM/ECMWF AND UKMET ARE ALSO USED IN
A BROAD BASED CHECK FOR SPREAD OF OPERATIONAL SOLUTIONS AND USED
ACCORDINGLY TO EXPRESS LESS CONFIDENCE IN PROBABILITIES OF THE
MOSTLY LIKELY DAILY OUTCOMES.

THE DAILIES...

TUESDAY NIGHT...WAA BEGINS. SHOWERS POSSIBLE MAINLY LATE EVENING
AND MAINLY E PA AND E MD. WEAK INSTABILITY BURST. BEST CHC OF
SHOWERS MAY BE DELMARVA WHERE THE HIGHEST KI BREAKS OFF TO THE SE.
THUNDER IF ANY SHOULD BE CONFINED TO THE SOUTHWEST EDGE OF OUR
FCST AREA...E MD SHORE.

WEDNESDAY...WAA CONTINUES WITH A CHANCE OF SHOWERS FORECAST AREA
WIDE. AGAIN THE FOCUS E PA. PATCHY FOG MAY DEVELOP LATE AT NIGHT
IN THE WEAK WIND FIELD OF THE WARM FRONT. THUNDER CHANCES HIGHEST
IN E PA.

THURSDAY...STILL SOME INSTABILITY AROUND BUT SEEMS POTENTIALLY TO
BE A LESSER RISK OF SHOWERS? BEST CHANCE NORTHERN AND EASTERN NJ
WITH A POSSIBILITY OF WEAK NE SFC FLOW THAT AREA.

THURSDAY NIGHT...OTHER THAN THE SLIGHTEST CHANCE OF AN EVENING
SHOWER IN NNJ ASSOCIATED WITH LINGERING INSTABILITY AND UNLIKELY
THAT IT WILL RAIN...WE'RE LOOKING AT A NICE NIGHT WITH A NW
BREEZE.

FRIDAY AND SATURDAY...GENERAL NW FLOW ALOFT AND WEAK INSTABILITY
ASSOCIATED WITH THE TROUGH ALOFT. THERE MAY BE A BIT MORE CLOUD
COVER THAN INDICATED IN OUR 330 FCST. MOST OF THE TIME IT SHOULD
NOT BE RAINING BUT THERE COULD BE SEVERAL BANDS OF
SHOWERS...MAINLY DIURNALLY HEAT DRIVEN FOR THE AFTN/EVENING.

SUNDAY...DRY AND NICE! RIDGING ALL LEVELS.

MONDAY...CONTINUED DRY AND WARMER. RIDGING ALL LEVELS.

&&

.AVIATION /00Z TUESDAY THROUGH SATURDAY/...
THE FOLLOWING DISCUSSION IS FOR KPHL, KPNE, KTTN, KABE, KRDG,
KILG, KMIV, KACY AND SURROUNDING AREAS.

VFR CONDITIONS WILL PREVAIL THROUGH THE PERIOD. ANY SHOWERS THIS
EVENING WILL DISSIPATE AS WILL ANY CLOUDS. THE GUSTY WINDS WILL
ALSO DISSIPATE AFTER SUNSET, AND COULD BECOME LIGHT AND VARIABLE
AT SOME SITES OVERNIGHT. ANY DIRECTION WILL REMAIN WEST- NORTHWEST
WITH SPEEDS AROUND 5-10 KNOTS THROUGH TOMORROW.

OUTLOOK...

TUE NIGHT...VFR CIGS AOA 5000 FT. A FEW SHOWERS POSSIBLE LATE
TUESDAY NIGHT, GENERALLY S AND W OF PHL. HIGH CONFIDENCE.

WED-WED NIGHT...MVFR CONDITIONS POSSIBLE WITH SCATTERED SHOWERS
AND/OR ISOLATED THUNDERSTORMS IN ADVANCE OF A CDFNT DURING THE
DAY, APPROACHING FROM THE W. IFR CONDITIONS IN FOG/STRATUS AT
NIGHT, ESPECIALLY LATE.

THURSDAY...THERE SHOULD BE IMPROVING CIGS/VSBY TO MVFR OR VFR
CIGS IN THE AFTN WITH SCT SHWRS POSSIBLE. MDT CONFIDENCE.

FRIDAY AND SATURDAY...VFR CIGS BUT THERE STILL COULD BE SOME
LINGERING MVFR CONDS IN SCT MAINLY AFTN SHWRS. LOW CONFIDENCE.

&&

.MARINE...
SUB-ADVISORY CONDITIONS WILL PREVAIL THROUGH TUESDAY AS HIGH
PRESSURE BEGINS TO SINK TO OUR SOUTH BY TUESDAY, ALTHOUGH WINDS
MAY OCCASIONALLY GUST AROUND 20 KNOTS.

OUTLOOK...
TUE NIGHT-SAT...SUB-ADVISORY CONDITIONS EXPECTED THROUGH MOST OF
THE PERIOD. FOG MAY BECOME A HAZARD FOR A TIME LATE WEDNESDAY
NIGHT OR THURSDAY.

&&

.RIP CURRENTS...
A MODERATE RISK OF RIP CURRENTS IS EXPECTED FOR THE REST OF
TODAY.

&&

.EQUIPMENT...
THE KDIX RADAR REMAINS OUT OF SERVICE UNTIL FURTHER NOTICE.
REPAIR EFFORTS CONTINUE.

&&

.PHI WATCHES/WARNINGS/ADVISORIES...
PA...NONE.
NJ...NONE.
DE...NONE.
MD...NONE.
MARINE...NONE.

&&

SYNOPSIS...DRAG
NEAR TERM...IOVINO
SHORT TERM...ROBERTSON
LONG TERM...DRAG
AVIATION...DRAG/ROBERTSON
MARINE...DRAG/ROBERTSON
RIP CURRENTS...ROBERTSON
EQUIPMENT...DRAG

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
352 PM EDT MON MAY 19 2014

DEZ001>003-MDZ008-012-015-019-020-NJZ001-007>010-012-013-015>023-027-
PAZ054-055-060>062-070-071-101>106-202000-
NEW CASTLE-KENT-INLAND SUSSEX-CECIL-KENT MD-QUEEN ANNES-TALBOT-
CAROLINE-SUSSEX-WARREN-MORRIS-HUNTERDON-SOMERSET-MIDDLESEX-
WESTERN MONMOUTH-MERCER-SALEM-GLOUCESTER-CAMDEN-
NORTHWESTERN BURLINGTON-OCEAN-CUMBERLAND-ATLANTIC-CAPE MAY-
SOUTHEASTERN BURLINGTON-CARBON-MONROE-BERKS-LEHIGH-NORTHAMPTON-
DELAWARE-PHILADELPHIA-WESTERN CHESTER-EASTERN CHESTER-
WESTERN MONTGOMERY-EASTERN MONTGOMERY-UPPER BUCKS-LOWER BUCKS-
352 PM EDT MON MAY 19 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR CENTRAL DELAWARE...NORTHERN
DELAWARE...SOUTHERN DELAWARE...NORTHEAST MARYLAND...CENTRAL NEW
JERSEY...NORTHERN NEW JERSEY...NORTHWEST NEW JERSEY...SOUTHERN NEW
JERSEY...EAST CENTRAL PENNSYLVANIA...NORTHEAST PENNSYLVANIA AND
SOUTHEAST PENNSYLVANIA.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

ANZ430-431-450>455-202000-
DELAWARE BAY WATERS NORTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
DELAWARE BAY WATERS SOUTH OF EAST POINT NJ TO SLAUGHTER BEACH DE-
COASTAL WATERS FROM SANDY HOOK TO MANASQUAN INLET NJ OUT 20 NM-
COASTAL WATERS FROM MANASQUAN INLET TO LITTLE EGG INLET NJ OUT 20 NM-
COASTAL WATERS FROM LITTLE EGG INLET TO GREAT EGG INLET NJ OUT 20 NM-
COASTAL WATERS FROM GREAT EGG INLET TO CAPE MAY NJ OUT 20 NM-
COASTAL WATERS FROM CAPE MAY NJ TO CAPE HENLOPEN DE OUT 20 NM-
COASTAL WATERS FROM CAPE HENLOPEN TO FENWICK ISLAND DE OUT 20 NM-
352 PM EDT MON MAY 19 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR ATLANTIC COASTAL WATERS AND
DELAWARE BAY WATERS.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

DEZ004-NJZ014-024>026-202000-
DELAWARE BEACHES-EASTERN MONMOUTH-ATLANTIC COASTAL CAPE MAY-
COASTAL ATLANTIC-COASTAL OCEAN-
352 PM EDT MON MAY 19 2014

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHERN DELAWARE...CENTRAL
NEW JERSEY AND SOUTHERN NEW JERSEY.

.DAY ONE...THIS AFTERNOON AND TONIGHT.

THERE IS A MODERATE RISK OF RIP CURRENTS THE REST OF TODAY.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY.

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION IS NOT EXPECTED AT THIS TIME.

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
559 PM EDT MON MAY 19 2014

NJZ007-009-010-012>015-PAZ061-062-105-106-192230-
EASTERN MONMOUTH NJ-HUNTERDON NJ-LEHIGH PA-LOWER BUCKS PA-MERCER NJ-
MIDDLESEX NJ-NORTHAMPTON PA-SOMERSET NJ-UPPER BUCKS PA-WARREN NJ-
WESTERN MONMOUTH NJ-
559 PM EDT MON MAY 19 2014

...SHOWERS WITH STRONG WIND GUSTS WILL AFFECT PORTIONS OF
HUNTERDON...LEHIGH...MERCER...MIDDLESEX...MONMOUTH...NORTHERN
BUCKS...SOUTHERN NORTHAMPTON...SOUTHERN SOMERSET AND SOUTHWESTERN
WARREN COUNTIES...

AT 552 PM EDT...SHOWERS WITH STRONG WIND GUSTS WERE LOCATED FROM
ABOUT HUGUENOT TO NEW BRUNSWICK TO SOMERVILLE TO EASTON TO
ALLENTOWN, MOVING SOUTHEAST AT 35 MPH. THERE MAY ALSO BE A RUMBLE OF
THUNDER.

LOCAL WIND GUSTS TO 40 MPH ARE EXPECTED WITH THESE SHOWERS,
ESPECIALLY ALONG THE LEADING EDGE.

THESE SHOWERS WILL AFFECT BUT ARE NOT LIMITED TO FOUNTAIN HILL,
ANCIENT OAKS, UNION BEACH, LEONARDO, MACUNGIE, EMMAUS, STRATHMORE,
HIGHLANDS AND SANDY HOOK.

LAT...LON 4012 7402 4015 7426 4017 7426 4017 7441
      4021 7471 4037 7529 4066 7584 4079 7525
      4053 7455 4055 7425 4047 7425 4047 7414
      4043 7405 4043 7400 4048 7402 4048 7401
      4045 7396 4032 7396

FORECASTER: GORSE

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
626 PM EDT MON MAY 19 2014

NJZ013-014-020-026-192315-
COASTAL OCEAN NJ-EASTERN MONMOUTH NJ-OCEAN NJ-WESTERN MONMOUTH NJ-
626 PM EDT MON MAY 19 2014

...A SHOWER WITH GUSTY WINDS WILL AFFECT CENTRAL MONMOUTH AND
NORTHEASTERN OCEAN COUNTIES...

AT 622 PM EDT...A SHOWER WITH GUSTY WINDS WAS NEAR FREEHOLD, MOVING
SOUTHEAST AT 35 MPH. THERE CAN ALSO BE A RUMBLE OF THUNDER.

WIND GUSTS OF 35 TO 40 MPH ARE EXPECTED WITH THIS SHOWER, ESPECIALLY
ALONG THE LEADING EDGE.

THIS GUSTY SHOWER WILL BE NEAR HOWELL AROUND 640 PM...LAKEWOOD
AROUND 650 PM...BRICK TOWNSHIP AROUND 700 PM AND LAVALLETTE AROUND
710 PM.

LAT...LON 3989 7408 3978 7409 3980 7411 3992 7410
      3990 7412 3986 7412 3985 7413 3985 7414
      4028 7440 4031 7438 4039 7426 4015 7401

FORECASTER: GORSE

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
717 PM EDT MON MAY 19 2014

NJZ007-009-PAZ061-062-105-200000-
HUNTERDON NJ-LEHIGH PA-NORTHAMPTON PA-UPPER BUCKS PA-WARREN NJ-
717 PM EDT MON MAY 19 2014

...SHOWERS WITH GUSTY WINDS WILL AFFECT EASTERN
LEHIGH...HUNTERDON...NORTHWESTERN BUCKS...SOUTHERN NORTHAMPTON AND
SOUTHWESTERN WARREN COUNTIES...

AT 713 PM EDT...SHOWERS WITH GUSTY WINDS WERE LOCATED FROM ROXBURG
TO ALLENTOWN, MOVING SOUTHEAST AT 35 MPH. SOME RUMBLES OF THUNDER
ARE POSSIBLE.

WIND GUSTS OF 35 TO 40 MPH ARE ANTICIPATED WITH THESE SHOWERS,
ESPECIALLY ALONG THE LEADING EDGE.

THESE SHOWERS WILL BE NEAR TRUMBAUERSVILLE AROUND 730 PM...
SELLERSVILLE AROUND 740 PM...SILVERDALE AROUND 750 PM AND BYRAM
AROUND 800 PM.

LAT...LON 4058 7472 4030 7529 4064 7562 4086 7506

FORECASTER: GORSE