301
FNUS71 KPHI 191904
FWSPHI
SPOT FORECAST FOR CW 12_15...DELAWARE FOREST SERVICE
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
304 PM EDT SUN APR 19 2026
FORECAST IS BASED ON IGNITION TIME OF 0600 EDT ON APRIL 20.
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 BUILDS INTO THE REGION TO START THE WEEK BEFORE
SHIFTING OFFSHORE ON TUESDAY NIGHT. A WEAK COLD FRONT SHOULD SETTLE
SOUTH OF OUR AREA WEDNESDAY, THEN RETURN AS A WARM FRONT LATER
FRIDAY OR ON SATURDAY.
MONDAY
SKY/WEATHER.........PARTLY SUNNY (60-70 PERCENT).
CWR.................10 PERCENT.
CHANCE OF PCPN......10 PERCENT.
MAX TEMPERATURE.....AROUND 56.
MIN HUMIDITY........25 TO 30 PERCENT.
WIND SHIFT..........WEST/SOUTHWEST WINDS IN MORNING BECOME NORTHWESTERLY BY 8 TO 9 AM.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 10 MPH SHIFTING TO THE
NORTHWEST 10 TO 20 MPH IN THE LATE MORNING AND
AFTERNOON.
MIXING HEIGHT.......8000 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 10 TO 15 MPH SHIFTING TO THE WEST 15
TO 25 MPH EARLY IN THE MORNING, THEN SHIFTING
TO THE NORTHWEST 25 TO 30 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (3500 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (79200 KNOT-FT) IN THE
AFTERNOON INCREASING TO EXCELLENT (108500
KNOT-FT) LATE IN THE MORNING.
ADI.................7 EARLY IN THE MORNING INCREASING TO 122 IN THE
AFTERNOON.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........71 81 71 55 44 49 46 53 60 64 76 56
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............10 10 10 0 0 0 0 0 0 10 10 0
CHC OF PCPN (%).10 10 10 0 0 0 0 0 0 10 10 0
TEMP............40 41 47 49 51 52 54 54 54 55 54 54
RH..............67 65 58 54 50 46 40 36 34 31 28 27
20 FT WIND DIR..SW SW W W NW NW NW NW NW NW NW NW
20 FT WIND SPD..6 6 7 12 13 14 14 16 16 16 15 14
20 FT WIND GUST.10 12 14 15 22 24 25 26 26 26 25 24
MIX HGT (KFT)...0.4 0.4 0.9 2.7 4.0 5.2 6.2 6.5 7.0 7.3 7.8 8.0
TRANSP WIND DIR.S SW W W NW NW NW NW NW NW NW NW
TRANSP WIND SPD.10 10 15 21 23 24 25 26 25 25 24 24
ADI.............7 11 19 47 85 101 114 90 88 122 87 87
VRATE KT-FT/1K..4 4 12 49 79 109 136 150 154 161 163 168
VENTRATE CAT....PR PR PR FR GD VGD VGD VGD EXL EXL EXL EXL
MONDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR.
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
MIN TEMPERATURE.....AROUND 33.
MAX HUMIDITY........AROUND 35 PERCENT.
WIND SHIFT..........NONE EXPECTED.
WIND (20 FT)........NORTHWEST WINDS 5 TO 10 MPH.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....NORTHWEST 15 TO 25 MPH SHIFTING TO THE NORTH 10
TO 15 MPH LATE IN THE EVENING.
SMOKE DISPERSAL.....EXCELLENT (76500 KNOT-FT) DECREASING TO POOR
(4500 KNOT-FT) EARLY IN THE EVENING.
ADI.................117 EARLY IN THE EVENING DECREASING TO 5 LATE
IN THE NIGHT.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........46 32 8 14 11 7 6 6 5 5 5 5
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............52 49 45 43 41 40 38 37 36 35 34 34
RH..............28 31 36 43 48 50 54 56 59 61 64 64
20 FT WIND DIR..NW NW NW NW NW NW NW N N N N N
20 FT WIND SPD..13 12 7 7 7 6 5 6 6 6 6 6
20 FT WIND GUST.22 20 14 13 13 12 12 10 10 10 10 10
MIX HGT (KFT)...7.3 4.3 0.5 0.6 0.6 0.6 0.6 0.6 0.6 0.5 0.5 0.5
TRANSP WIND DIR.NW NW N N N N N N N N N N
TRANSP WIND SPD.24 21 15 16 15 14 13 13 12 12 10 10
ADI.............117 14 7 7 7 6 6 5 5 5 5 5
VRATE KT-FT/1K..154 77 7 9 8 7 6 6 6 5 5 5
VENTRATE CAT....EXL GD PR PR PR PR PR PR PR PR PR PR
TUESDAY
SKY/WEATHER.........SUNNY (0-10 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
MAX TEMPERATURE.....AROUND 57.
MIN HUMIDITY........26 PERCENT.
WIND SHIFT..........WEST/NORTHWEST IN THE MORNING BECOME SOUTHWESTERLY BY 1 TO 2 PM.
WIND (20 FT)........NORTH WINDS 5 TO 10 MPH SHIFTING TO THE WEST
AROUND 5 MPH EARLY IN THE AFTERNOON, THEN
SHIFTING TO THE SOUTHWEST LATE IN THE
AFTERNOON.
MIXING HEIGHT.......4800 FT AGL.
TRANSPORT WINDS.....NORTH 8 TO 14 MPH SHIFTING TO THE SOUTHWEST
AROUND 10 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (9900 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (45100 KNOT-FT) IN THE
AFTERNOON.
ADI.................5 EARLY IN THE MORNING INCREASING TO 65 IN THE
AFTERNOON.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........5 4 4 5 5 6 5 4 3 4 5 6
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............35 36 38 40 44 47 49 51 53 55 56 57
RH..............61 56 52 46 38 34 31 29 28 26 26 27
20 FT WIND DIR..N N N N N N NW W W W SW SW
20 FT WIND SPD..6 6 6 5 5 5 5 5 5 5 5 5
20 FT WIND GUST.10 10 10 9 9 8 8 8 8 8 8 8
MIX HGT (KFT)...1.0 1.5 2.0 2.8 3.7 4.5 4.6 4.7 4.8 4.7 4.6 4.5
TRANSP WIND DIR.N N N N N N NW NW NW W W SW
TRANSP WIND SPD.12 13 14 13 13 12 10 8 7 7 8 8
ADI.............5 24 35 47 57 65 58 50 42 43 44 46
VRATE KT-FT/1K..10 16 24 32 39 45 40 35 29 30 31 31
VENTRATE CAT....PR PR PR PR PR FR FR PR PR PR PR PR
FORECASTER...HOEFLICH
REQUESTED BY...KYLE HOYD
TYPE OF REQUEST...PRESCRIBED
.TAG 2610733.0/PHI
.DELDT 04/19/26
.FORMATTERVERSION 2.0.0
.EMAIL KYLE.HOYD@DELAWARE.GOV
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