108
FNUS71 KPHI 181214
FWSPHI
SPOT FORECAST FOR DE-DES RX 2026...DE-DES
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
814 AM EDT WED MAR 18 2026
FORECAST IS BASED ON IGNITION TIME OF 0700 EDT ON MARCH 18.
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 IN DURING TODAY, THEN MOVES OFFSHORE
ON THURSDAY. THIS WILL RESULT IN DRY CONDITIONS ALONG WITH LIGHTER
WINDS. SEVERAL WEAK SYSTEMS MAY BRING SOME PRECIPITATION LATE IN THE
WEEK THROUGH THE WEEKEND, WITH TEMPERATURES MODERATING BACK TO ABOVE
AVERAGE LEVELS.
REST OF TODAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) THEN BECOMING
SUNNY (20-30 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
MAX TEMPERATURE.....AROUND 43.
MIN HUMIDITY........29 PERCENT.
WIND SHIFT..........NONE.
WIND (20 FT)........NORTH WINDS AROUND 6 MPH IN THE MORNING
SHIFTING TO THE NORTHEAST, THEN SHIFTING TO THE
EAST AROUND 5 MPH EARLY IN THE AFTERNOON
BECOMING LIGHT BECOMING SOUTHEAST AROUND 5 MPH
LATE IN THE AFTERNOON BECOMING LIGHT.
MIXING HEIGHT.......5400 FT AGL.
TRANSPORT WINDS.....NORTH 7 TO 16 MPH SHIFTING TO THE SOUTHEAST 5
TO 6 MPH EARLY IN THE AFTERNOON, THEN SHIFTING
TO THE SOUTH 7 TO 9 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR (18400 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (42000 KNOT-FT) IN THE
AFTERNOON.
ADI.................24 TO 50.
TIME (EDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........74 90 92 94 91 75 54 36 31 19 14
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............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
TEMP............28 28 29 32 34 37 39 40 41 42 41
RH..............53 48 46 39 36 32 30 30 29 29 30
20 FT WIND DIR..N N N N NE NE E SE SE S SE
20 FT WIND SPD..8 9 9 8 7 6 5 5 5 5 5
20 FT WIND GUST.14 16 15 14 10 9 8 8 8 8 7
MIX HGT (KFT)...2.2 2.4 2.5 2.8 3.3 3.9 4.6 5.1 5.4 5.4 5.3
TRANSP WIND DIR.N N N N N N SE S S S SE
TRANSP WIND SPD.13 15 16 15 10 7 5 6 7 8 9
ADI.............35 42 46 46 35 26 25 24 29 50 39
VRATE KT-FT/1K..24 31 35 36 29 24 18 25 32 38 42
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR FR
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
MIN TEMPERATURE.....AROUND 29.
MAX HUMIDITY........75 PERCENT.
WIND SHIFT..........NONE.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......300 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 7 TO 9 MPH.
SMOKE DISPERSAL.....FAIR (27000 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (1600 KNOT-FT) LATE IN THE
NIGHT.
ADI.................3 TO 29.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........12 12 23 22 18 18 14 15 14 20 23 23
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............40 38 34 32 31 31 31 30 30 29 31 31
RH..............34 38 49 56 61 63 66 69 72 75 72 72
20 FT WIND DIR..SE SE SE SE SE SE SE SE SE SE SE SE
20 FT WIND SPD..5 3 5 3 3 3 3 3 3 3 3 3
20 FT WIND GUST.7 7 8 7 7 7 7 7 7 6 6 6
MIX HGT (KFT)...3.9 0.9 0.6 0.4 0.4 0.4 0.4 0.4 0.3 0.3 0.3 0.3
TRANSP WIND DIR.S SE SE SE SE SE SE SE SE SE SE SE
TRANSP WIND SPD.8 8 9 9 9 9 8 7 7 7 7 7
ADI.............29 5 4 4 4 4 4 3 3 3 3 3
VRATE KT-FT/1K..27 6 5 3 3 3 3 2 2 2 2 2
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
MAX TEMPERATURE.....AROUND 52.
MIN HUMIDITY........38 PERCENT.
WIND SHIFT..........NONE.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHEAST 5 TO 6 MPH LATE
IN THE MORNING.
MIXING HEIGHT.......4100 FT AGL.
TRANSPORT WINDS.....SOUTH 7 TO 13 MPH.
SMOKE DISPERSAL.....POOR (1800 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (39600 KNOT-FT) IN THE
AFTERNOON.
ADI.................0 EARLY IN THE MORNING INCREASING TO 45 IN THE
AFTERNOON.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........18 18 17 9 12 14 20 26 32 40 47 55
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............31 31 33 36 40 45 48 49 50 52 52 51
RH..............75 75 72 64 55 45 40 40 39 38 38 41
20 FT WIND DIR..SE SE SE SE SE SE SE SE SE SE SE SE
20 FT WIND SPD..3 3 3 2 3 5 5 6 6 6 6 6
20 FT WIND GUST.6 6 7 7 8 8 9 10 10 10 10 10
MIX HGT (KFT)...0.3 0.3 0.3 1.3 2.2 3.1 3.5 3.8 4.1 4.0 3.8 3.6
TRANSP WIND DIR.SE SE SE SE S S S S S S S S
TRANSP WIND SPD.7 8 8 8 8 8 8 9 9 10 12 13
ADI.............3 8 8 13 22 31 36 40 45 0 0 0
VRATE KT-FT/1K..2 2 2 9 15 22 25 29 33 36 38 40
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 2606238.0/PHI
.DELDT 03/18/26
.FORMATTERVERSION 2.0.0
.EMAIL SAM.TOPPER@DELAWARE.GOV
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