344
FNUS71 KPHI 111719
FWSPHI
SPOT FORECAST FOR SGL 38 WS5 RX FIRE...PA
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
119 PM EDT MON MAY 11 2026
FORECAST IS BASED ON IGNITION TIME OF 0800 EDT ON MAY 12.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
HIGH PRESSURE THEN BUILDS IN TONIGHT BEFORE SHIFTING OFFSHORE LATER
TUESDAY. LOW PRESSURE AND ITS ASSOCIATED FRONTS ARRIVE WEDNESDAY
INTO THURSDAY. HIGH PRESSURE THEN BUILDS IN LATER FRIDAY AND INTO
THE WEEKEND.
TUESDAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
MAX TEMPERATURE.....AROUND 61.
MIN HUMIDITY........29 PERCENT.
WIND SHIFT..........
WIND (20 FT)........NORTHWEST WINDS 5 TO 7 MPH SHIFTING TO THE WEST
AROUND 6 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......6000 FT AGL.
TRANSPORT WINDS.....NORTHWEST 9 TO 13 MPH SHIFTING TO THE WEST
AROUND 9 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR (15600 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (59000 KNOT-FT) IN THE
AFTERNOON.
ADI.................23 EARLY IN THE MORNING INCREASING TO 83 IN THE
AFTERNOON.
TIME (EDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........4 5 4 5 3 1 2 6 13 22
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0
TEMP............42 45 48 51 54 55 57 59 60 60
RH..............62 55 49 44 38 35 31 30 29 29
20 FT WIND DIR..N N N NW NW NW NW NW W W
20 FT WIND SPD..8 7 6 6 5 6 6 6 5 6
20 FT WIND GUST.15 13 10 10 10 10 12 10 10 10
MIX HGT (KFT)...1.6 2.8 4.1 4.7 5.0 5.3 5.6 5.9 5.9 6.0
TRANSP WIND DIR.N N N N NW NW NW NW NW W
TRANSP WIND SPD.12 13 10 9 10 10 10 12 10 9
ADI.............23 44 54 54 65 69 71 83 75 67
VRATE KT-FT/1K..16 31 37 37 45 48 50 59 53 48
VENTRATE CAT....PR PR PR PR FR FR FR FR FR FR
TUESDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) THEN BECOMING
MOSTLY CLOUDY (75-85 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS EARLY IN THE MORNING.
CWR.................0 PERCENT INCREASING TO 20 PERCENT EARLY IN THE
MORNING.
CHANCE OF PCPN......20 PERCENT.
MIN TEMPERATURE.....AROUND 42.
MAX HUMIDITY........86 PERCENT.
WIND SHIFT..........
WIND (20 FT)........WEST WINDS AROUND 5 MPH EARLY IN THE EVENING
BECOMING LIGHT, THEN BECOMING SOUTH 5 TO 6 MPH
OVERNIGHT.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 7 TO 12 MPH SHIFTING TO THE SOUTH 10
TO 12 MPH AFTER 3 AM.
SMOKE DISPERSAL.....GOOD (41900 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (2500 KNOT-FT) LATE IN THE
NIGHT.
ADI.................60 EARLY IN THE EVENING DECREASING TO 3 LATE IN
THE NIGHT.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........36 42 46 72 67 63 80 89 92 97 96 96
WEATHER COV..... SCH
WEATHER TYPE.... RW
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 20
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 20
TEMP............59 57 54 49 47 46 46 44 44 44 43 44
RH..............34 40 49 58 60 63 63 66 69 72 79 72
20 FT WIND DIR..W W W SW SW SW SW S S S S S
20 FT WIND SPD..6 5 2 2 1 2 3 5 5 6 7 7
20 FT WIND GUST.10 9 7 5 5 7 8 10 13 14 16 16
MIX HGT (KFT)...5.2 2.4 0.5 0.5 0.4 0.4 0.5 0.6 0.7 0.5 0.7 0.7
TRANSP WIND DIR.W W SW W SW SW SW SW SW S S S
TRANSP WIND SPD.9 8 7 8 7 8 10 12 12 10 12 12
ADI.............60 5 3 4 3 4 5 8 8 7 7 8
VRATE KT-FT/1K..42 17 3 4 3 3 5 6 7 5 6 7
VENTRATE CAT....FR PR PR PR PR PR PR PR PR PR PR PR
WEDNESDAY
SKY/WEATHER.........CLOUDY (85-95 PERCENT). CHANCE OF RAIN SHOWERS
IN THE MORNING AND EARLY AFTERNOON. RAIN
SHOWERS LATE IN THE AFTERNOON. SLIGHT CHANCE OF
THUNDERSTORMS LATE IN THE AFTERNOON.
CWR.................0 PERCENT INCREASING TO 90 PERCENT.
CHANCE OF PCPN......90 PERCENT.
MAX TEMPERATURE.....AROUND 61.
MIN HUMIDITY........70 PERCENT.
WIND SHIFT..........
WIND (20 FT)........SOUTH WINDS 7 TO 12 MPH. GUSTS UP TO 21 MPH
EARLY IN THE MORNING THEN 25 MPH IN THE LATE
MORNING AND AFTERNOON. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS LATE IN THE
AFTERNOON.
MIXING HEIGHT.......2400 FT AGL.
TRANSPORT WINDS.....SOUTH 12 TO 20 MPH.
SMOKE DISPERSAL.....POOR (6800 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (41200 KNOT-FT) IN THE
AFTERNOON.
ADI.................10 TO 42.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........95 90 87 92 90 87 88 90 91 91 91 91
WEATHER COV..... CHC CHC CHC CHC CHC CHC CHC DEF DEF DEF DEF
WEATHER TYPE.... RW RW RW RW RW RW RW RW RW RW RW
TSTM COV........ SCH
CWR.............0 30 50 50 50 50 50 50 90 90 90 90
CHC OF PCPN (%).0 30 50 50 50 50 50 50 90 90 90 90
TEMP............44 44 46 48 50 52 54 56 58 58 58 58
RH..............84 84 86 83 81 80 76 72 70 70 72 75
20 FT WIND DIR..S S S S S S S S S S S S
20 FT WIND SPD..8 9 10 12 13 13 13 13 13 13 12 12
20 FT WIND GUST.20 21 17 20 21 22 23 24 25 24 23 22
MIX HGT (KFT)...0.7 1.4 1.4 1.5 1.6 1.8 2.0 2.2 2.4 2.4 2.4 2.4
TRANSP WIND DIR.S S S S S S S SW SW SW SW SW
TRANSP WIND SPD.12 13 15 15 17 18 18 20 20 20 18 18
ADI.............10 23 26 25 29 33 36 39 42 41 40 39
VRATE KT-FT/1K..7 15 18 20 24 28 33 37 41 40 39 38
VENTRATE CAT....PR PR PR PR PR PR PR PR FR FR PR PR
FORECASTER...MPS
REQUESTED BY...BRIAN WILLIAMSON
TYPE OF REQUEST...PRESCRIBED
.TAG 2613320.1/PHI
.DELDT 05/12/26
.FORMATTERVERSION 2.0.0
.EMAIL BRIANWILLI@PA.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page