137
FNUS71 KPHI 230621
FWSPHI
SPOT FORECAST FOR TUNK PRESERVE...THE NATURE CONSERVANCY
NATIONAL WEATHER SERVICE MOUNT HOLLY NJ
221 AM EDT THU APR 23 2026
FORECAST IS BASED ON IGNITION TIME OF 0900 EDT ON APRIL 23.
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 AREA TODAY WHICH IS FOLLOWED
BY A BACK DOOR COLD FRONT WHICH SINKS SOUTH ACROSS THE REGION
TOMORROW. AN AREA OF LOW PRESSURE TRACKS THROUGH THE REGION
OVER THE WEEKEND WITH HIGH PRESSURE RETURNING BY MONDAY.
ANOTHER FRONTAL SYSTEM TRACKS THROUGH THE AREA AROUND THE
MIDDLE OF NEXT WEEK.
SURFACE DEW POINTS WILL START OUT CLOSE TO 50, THEN WILL MIX
DOWN TO THE LOW 40S AND EVEN UPPER 30S WITH EFFICIENT MIXING.
THIS RESULTS IN MINRH VALUES FROM 25 TO 35 PERCENT AWAY FROM
THE COASTS. GIVEN THIS, HAVE REACHED OUT TO FIRE WEATHER
PARTNERS REGARDING ANY CONCERNS WHICH MAY JUSTIFY A SPECIAL
WEATHER STATEMENT, BUT ANY FEEDBACK IS LIKELY SEVERAL HOURS
AWAY.
REST OF TODAY
SKY/WEATHER.........SUNNY (15-25 PERCENT).
CWR.................0 PERCENT.
CHANCE OF PCPN......0 PERCENT.
MAX TEMPERATURE.....AROUND 64.
MIN HUMIDITY........34 PERCENT.
WIND SHIFT..........NONE
WIND (20 FT)........NORTHWEST WINDS 7 TO 12 MPH.
MIXING HEIGHT.......4800 FT AGL.
TRANSPORT WINDS.....NORTHWEST 15 TO 24 MPH.
SMOKE DISPERSAL.....FAIR (13300 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (99800 KNOT-FT) IN THE
AFTERNOON.
ADI.................20 EARLY IN THE MORNING INCREASING TO 98 IN THE
AFTERNOON.
TIME (EDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........29 15 11 20 31 17 22 13 7
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 0
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0
TEMP............53 56 59 61 63 64 64 64 63
RH..............66 57 49 42 36 34 34 35 38
20 FT WIND DIR..NW NW NW NW NW NW NW NW NW
20 FT WIND SPD..8 9 12 12 13 13 13 12 12
20 FT WIND GUST.14 17 20 22 22 23 22 22 21
MIX HGT (KFT)...1.0 2.0 3.2 3.7 4.3 4.6 4.8 4.6 4.3
TRANSP WIND DIR.NW NW NW NW NW NW NW NW NW
TRANSP WIND SPD.15 18 22 23 24 24 24 24 24
ADI.............20 46 72 82 93 96 98 96 93
VRATE KT-FT/1K..13 32 60 73 90 96 100 96 90
VENTRATE CAT....PR PR FR GD GD GD GD GD GD
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (20-30 PERCENT) THEN BECOMING
MOSTLY CLOUDY (60-70 PERCENT).
CWR.................10 PERCENT.
CHANCE OF PCPN......10 PERCENT.
MIN TEMPERATURE.....AROUND 40.
MAX HUMIDITY........67 PERCENT.
WIND SHIFT..........NONE
WIND (20 FT)........NORTHWEST WINDS 5 TO 10 MPH IN THE EVENING AND
OVERNIGHT BECOMING LIGHT.
MIXING HEIGHT.......100 FT AGL.
TRANSPORT WINDS.....NORTH 14 TO 23 MPH DECREASING TO 8 TO 14 MPH
LATE IN THE EVENING.
SMOKE DISPERSAL.....EXCELLENT (70900 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (400 KNOT-FT) LATE IN THE
NIGHT.
ADI.................81 EARLY IN THE EVENING DECREASING TO 4 LATE IN
THE NIGHT.
TIME (EDT) 6 PM 9 PM MIDNGT 3 AM
SKY (%).........12 53 56 73
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE
TSTM COV........
CWR.............0 0 0 10
CHC OF PCPN (%).0 0 0 10
TEMP............62 52 46 42
RH..............38 46 51 60
20 FT WIND......NW 12G21 NW 9G16 N 7G13 NW 5G8
MIX HGT (FT)....3500 300 200 100
TRANSPORT WIND..NW 23 N 14 N 14 N 9
ADI.............81 12 9 6
VRATE KT-FT/1K..71 4 2 0
VENTRATE CAT....GOOD POOR POOR POOR
FRIDAY
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT).
CWR.................10 PERCENT.
CHANCE OF PCPN......10 PERCENT.
MAX TEMPERATURE.....AROUND 62.
MIN HUMIDITY........41 PERCENT.
WIND SHIFT..........NONE
WIND (20 FT)........LIGHT WINDS BECOMING NORTHWEST AROUND 6 MPH.
MIXING HEIGHT.......3400 FT AGL.
TRANSPORT WINDS.....NORTHWEST 7 TO 13 MPH.
SMOKE DISPERSAL.....POOR (600 KNOT-FT) EARLY IN THE MORNING
INCREASING TO GOOD (34400 KNOT-FT) IN THE
AFTERNOON.
ADI.................4 EARLY IN THE MORNING INCREASING TO 51 IN THE
AFTERNOON.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........68 77 65 60 53 46 42 39 35 35 35 35
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............41 42 44 47 50 54 57 59 60 61 61 60
RH..............67 67 65 60 56 50 45 44 42 41 42 44
20 FT WIND DIR..N N N N N NW NW NW NW NW NW NW
20 FT WIND SPD..3 3 6 6 6 6 6 6 6 7 7 6
20 FT WIND GUST.5 6 13 12 12 12 13 13 14 14 14 13
MIX HGT (KFT)...0.1 0.1 0.6 1.1 1.7 2.4 2.8 3.1 3.4 3.3 3.1 2.9
TRANSP WIND DIR.N N N N N N NW NW NW NW NW NW
TRANSP WIND SPD.8 7 9 13 12 12 12 12 12 12 10 10
ADI.............4 7 10 19 26 35 41 46 51 44 41 39
VRATE KT-FT/1K..1 1 4 12 17 24 28 31 34 32 29 26
VENTRATE CAT....PR PR PR PR PR PR PR PR PR PR PR PR
FORECASTER...RCM
REQUESTED BY...PATRICK MCELHENNY
TYPE OF REQUEST...PRESCRIBED
.TAG 2611439.0/PHI
.DELDT 04/23/26
.FORMATTERVERSION 2.0.0
.EMAIL PMCELHENNY@TNC.ORG
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