888
FNUS71 KPHI 171029
FWSPHI
SPOT FORECAST FOR DE-DES RX 2026...DE-DES
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
629 AM EDT FRI APR 17 2026
FORECAST IS BASED ON IGNITION TIME OF 0700 EDT ON APRIL 17.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
A WEAK COLD FRONT WILL SHIFT OFFSHORE EARLY THIS MORNING WITH A FEW LIGHT
SHOWERS AROUND. ANY ISOLATED SHOWERS LATER THIS AFTERNOON COULD STAY NORTH
AND EAST OF THE AREA. TEMPERATURES WILL BE COOLING OVER THE NEXT FEW DAYS.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT). ISOLATED SHOWER
LATE IN THE AFTERNOON.
CWR.................10 PERCENT INCREASING TO 20 PERCENT LATE IN THE
AFTERNOON.
CHANCE OF PCPN......20 PERCENT.
MAX TEMPERATURE.....AROUND 79.
MIN HUMIDITY........47 PERCENT.
WIND SHIFT..........NONE.
WIND (20 FT)........NORTHWEST WINDS 6 TO 12 MPH.
MIXING HEIGHT.......6100 FT AGL.
TRANSPORT WINDS.....NORTHWEST 10 TO 15 MPH.
SMOKE DISPERSAL.....POOR (4300 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (73700 KNOT-FT) IN THE
AFTERNOON.
ADI.................11 EARLY IN THE MORNING INCREASING TO 94 IN THE
AFTERNOON.
TIME (EDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........54 39 39 39 39 43 48 53 51 48 46
WEATHER COV..... ISO
WEATHER TYPE.... RW
TSTM COV........
CWR.............10 10 0 0 0 10 10 10 10 10 20
CHC OF PCPN (%).10 10 0 0 0 10 10 10 10 10 20
TEMP............68 69 72 74 75 76 77 78 78 78 79
RH..............73 70 66 62 58 54 52 48 48 48 47
20 FT WIND DIR..W NW NW NW NW NW NW NW NW NW NW
20 FT WIND SPD..7 7 8 10 12 13 13 13 13 13 12
20 FT WIND GUST.13 13 14 17 20 21 21 21 21 21 20
MIX HGT (KFT)...0.5 1.0 1.8 3.4 4.5 5.5 5.9 5.8 5.9 6.0 6.1
TRANSP WIND DIR.NW NW NW NW NW NW NW NW NW NW N
TRANSP WIND SPD.10 10 12 13 13 12 13 14 14 14 14
ADI.............11 14 27 53 67 71 83 61 61 62 94
VRATE KT-FT/1K..4 9 18 38 49 55 65 69 70 72 74
VENTRATE CAT....PR PR PR PR FR FR GD GD GD GD GD
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) THEN BECOMING
MOSTLY CLOUDY (60-70 PERCENT).
CWR.................10 PERCENT.
CHANCE OF PCPN......10 PERCENT.
MIN TEMPERATURE.....AROUND 56.
MAX HUMIDITY........93 PERCENT.
WIND SHIFT..........NONE.
WIND (20 FT)........NORTH WINDS 5 TO 8 MPH, BECOMING LIGHT
OVERNIGHT, THEN BECOMING EAST 5 TO 6 MPH AFTER 3 AM.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....NORTH 9 TO 13 MPH SHIFTING TO THE EAST 9 TO 12
MPH IN THE LATE EVENING AND OVERNIGHT.
SMOKE DISPERSAL.....GOOD (40400 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (3200 KNOT-FT) LATE IN THE
NIGHT.
ADI.................56 EARLY IN THE EVENING DECREASING TO 4 LATE IN
THE NIGHT.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........34 21 9 11 13 15 23 30 38 49 61 72
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............10 10 0 0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).10 10 0 0 0 0 0 0 0 0 0 0
TEMP............76 73 71 69 67 65 63 62 60 60 59 58
RH..............50 55 59 63 68 73 78 81 87 87 87 90
20 FT WIND DIR..NW NW N N N N NE NE NE NE E E
20 FT WIND SPD..10 8 6 6 5 5 3 3 2 3 5 6
20 FT WIND GUST.17 14 10 9 8 8 7 6 5 6 8 9
MIX HGT (KFT)...3.7 0.6 0.4 0.4 0.4 0.4 0.4 0.6 0.7 0.7 0.8 0.9
TRANSP WIND DIR.N N N N NE NE E E E E E E
TRANSP WIND SPD.13 10 9 9 9 10 9 9 9 10 10 12
ADI.............56 5 4 4 4 5 4 4 4 5 7 8
VRATE KT-FT/1K..40 5 3 3 3 4 3 5 5 6 7 9
VENTRATE CAT....FR PR PR PR PR PR PR PR PR PR PR PR
SATURDAY
SKY/WEATHER.........MOSTLY CLOUDY (65-75 PERCENT) THEN BECOMING
MOSTLY SUNNY (40-50 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
MAX TEMPERATURE.....AROUND 73.
MIN HUMIDITY........59 PERCENT.
WIND SHIFT..........NONE.
WIND (20 FT)........SOUTHEAST WINDS 6 TO 12 MPH.
MIXING HEIGHT.......2100 FT AGL.
TRANSPORT WINDS.....EAST 8 TO 13 MPH SHIFTING TO THE SOUTHEAST 10
TO 17 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (10500 KNOT-FT) EARLY IN THE MORNING
INCREASING TO FAIR (22100 KNOT-FT) IN THE
AFTERNOON.
ADI.................8 TO 33.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........76 81 85 77 69 62 55 49 43 45 46 48
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............58 57 57 60 63 66 67 68 69 69 69 69
RH..............90 93 90 84 75 68 65 63 63 61 61 59
20 FT WIND DIR..E E E E E SE SE SE SE SE SE SE
20 FT WIND SPD..6 7 7 7 7 8 8 9 10 12 13 13
20 FT WIND GUST.12 13 13 13 13 14 15 16 17 20 20 21
MIX HGT (KFT)...1.1 1.1 1.3 1.4 1.6 1.9 2.0 2.1 2.1 1.9 1.7 1.5
TRANSP WIND DIR.E E E E E SE SE SE SE SE SE SE
TRANSP WIND SPD.13 12 12 10 9 8 9 10 12 13 15 17
ADI.............8 15 19 19 19 19 24 27 31 30 32 33
VRATE KT-FT/1K..12 11 13 13 13 13 16 19 21 21 22 22
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR
FORECASTER...GORSE
REQUESTED BY...SAM TOPPER
TYPE OF REQUEST...PRESCRIBED
.TAG 2610596.0/PHI
.DELDT 04/17/26
.FORMATTERVERSION 2.0.0
.EMAIL SAM.TOPPER@DELAWARE.GOV
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