FNUS71 KPHI 091957 FWSPHI SPOT FORECAST FOR SILVER SPRAY 1...NATIONAL PARK SERVICE NATIONAL WEATHER SERVICE MOUNT HOLLY NJ 357 PM EDT TUE APR 9 2013 FORECAST IS BASED ON IGNITION TIME OF 1100 EDT ON APRIL 10. IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER SERVICE. .DISCUSSION... A FRONTAL BOUNDARY EXTENDED ACROSS NORTHERN PENNSYLVANIA AND NORTHERN NEW JERSEY THIS AFTERNOON. THE FRONT SHOULD MEANDER OVER THAT AREA THROUGH WEDNESDAY NIGHT BEFORE DROPPING SOUTHWARD INTO SOUTHEASTERN PENNSYLVANIA, SOUTHERN NEW JERSEY AND PERHAPS THE UPPER DELMARVA ON THURSDAY. LOW PRESSURE FROM THE WEST IS FORECAST TO PULL A COLD FRONT THROUGH OUR REGION LATE ON FRIDAY. HIGH PRESSURE IS ANTICIPATED TO FOLLOW FOR THE WEEKEND AND FOR MONDAY. ANOTHER FRONTAL BOUNDARY MAY APPROACH FROM THE NORTHWEST ON TUESDAY. .WEDNESDAY... SKY/WEATHER.........MOSTLY CLOUDY. ISOLATED THUNDERSTORMS IN THE AFTERNOON. SCATTERED SHOWERS. A CHANCE OF THUNDERSTORMS IN THE EVENING. TEMPERATURE.........68 AT IGNITION...MIN 50. RH..................52 PERCENT AT IGNITION...MAX 93 PERCENT. WIND (20 FT)........WINDS WEST AT 8 MPH AT IGNITION...OTHERWISE WEST WINDS 5 TO 10 MPH UNTIL EARLY EVENING...BECOMING LIGHT AND VARIABLE...THEN BECOMING SOUTHWEST AROUND 5 MPH LATE IN THE EVENING...BECOMING LIGHT AND VARIABLE. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS EARLY IN THE AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED NEAR THUNDERSTORMS EARLY IN THE EVENING. CWR.................20 PERCENT...INCREASING TO 40 PERCENT IN THE AFTERNOON...THEN INCREASING TO 60 PERCENT IN THE EVENING...DECREASING TO 40 PERCENT. CHANCE OF PCPN......60 PERCENT. LAL.................NO TSTMS UNTIL 1400...THEN 9-15 STRIKES UNTIL 2400...THEN NO TSTMS. WIND SHIFT.......... SURFACE WINDS.......WEST WINDS 5 TO 10 MPH UNTIL EARLY EVENING...BECOMING LIGHT AND VARIABLE...THEN BECOMING SOUTHWEST AROUND 5 MPH LATE IN THE EVENING...BECOMING LIGHT AND VARIABLE. TIME (EDT) 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM SKY (%).............77 76 75 75 77 83 85 85 85 85 86 88 89 88 87 87 82 73 69 WEATHER COV......... ISO ISO SCT SCT SCT SCT SCT SCT CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC WEATHER TYPE........ RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW RW TSTM COV............ ISO ISO ISO ISO ISO ISO CHC CHC CHC CHC TEMP................68 71 72 73 74 75 73 71 69 66 63 62 60 59 57 56 55 54 53 RH..................52 51 49 49 48 48 48 53 59 63 70 70 75 78 83 86 86 90 93 20 FT WIND DIR......W W W W W W W W NW NW NW W SW W W W W NW NW 20 FT WIND SPD......8 9 10 10 10 9 8 7 5 2 2 3 5 3 3 3 3 2 2 20 FT WIND GUST.....10 15 15 15 15 15 15 10 5 5 5 SURFACE WND DIR.....W W W W W W W W NW NW NW W SW W W W W NW NW SURFACE WND SPD.....8 9 10 10 10 9 8 7 5 2 2 3 5 3 3 3 3 2 2 SURFACE WND GST.....10 15 15 15 15 15 15 10 5 5 5 CWR.................20 20 20 40 40 40 40 40 40 60 60 60 60 60 60 40 40 40 40 CHC OF PCPN (%).....20 20 20 40 40 40 40 40 40 60 60 60 60 60 60 40 40 40 40 LAL.................1 1 1 3 3 3 3 3 3 3 3 3 3 1 1 1 1 1 1 .THURSDAY... SKY/WEATHER.........MOSTLY CLOUDY. A CHANCE OF SHOWERS. TEMPERATURE.........MAX 61. RH..................MIN 69 PERCENT. WIND (20 FT)........LIGHT AND VARIABLE WINDS...BECOMING EAST 5 TO 7 MPH LATE IN THE MORNING. CWR.................40 PERCENT...INCREASING TO 50 PERCENT IN THE AFTERNOON. CHANCE OF PCPN......50 PERCENT. LAL.................NO TSTMS. WIND SHIFT.......... SURFACE WINDS.......LIGHT AND VARIABLE WINDS...BECOMING EAST 5 TO 7 MPH LATE IN THE MORNING. TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM SKY (%).............75 89 96 95 93 91 89 87 86 86 87 89 WEATHER COV.........CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC WEATHER TYPE........RW RW RW RW RW RW RW RW RW RW RW RW TSTM COV............ TEMP................53 53 52 54 56 57 58 59 60 60 60 60 RH..................89 89 93 86 80 77 75 72 69 69 69 69 20 FT WIND DIR......N N NE NE NE NE NE NE E E E E 20 FT WIND SPD......2 2 2 3 3 5 5 6 6 7 7 7 20 FT WIND GUST..... 5 10 10 10 SURFACE WND DIR.....N N NE NE NE NE NE NE E E E E SURFACE WND SPD.....2 2 2 3 3 5 5 6 6 7 7 7 SURFACE WND GST..... 5 10 10 10 CWR.................40 40 40 40 40 40 40 40 50 50 50 50 CHC OF PCPN (%).....40 40 40 40 40 40 40 40 50 50 50 50 LAL.................1 1 1 1 1 1 1 1 1 1 1 1 .FORECAST DAYS 3 THROUGH 5... .FRIDAY... COOLER. SHOWERS AND A CHANCE OF THUNDERSTORMS. LOWS AROUND 50. HIGHS IN THE UPPER 50S. SOUTHEAST WINDS AROUND 8 MPH. .SATURDAY... PARTLY CLOUDY. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 50S. WEST WINDS AROUND 6 MPH. .SUNDAY... PARTLY CLOUDY. LOWS IN THE MID 30S. HIGHS AROUND 60. WEST WINDS AROUND 7 MPH. .MONDAY... PARTLY CLOUDY. LOWS IN THE LOWER 40S. HIGHS IN THE UPPER 60S. LIGHT AND VARIABLE WINDS. $$ FORECASTER...KLINE REQUESTED BY...APRIL PORTH TYPE OF REQUEST...PRESCRIBED .TAG 20130410.SILVE.01/PHI