727
FNUS71 KPHI 281433
FWSPHI

Spot Forecast for Clayton Bail fire...Delaware Forest Service
National Weather Service Mount Holly NJ
1033 AM EDT Thu Aug 28 2025

Forecast is based on ignition time of 1100 EDT on August 28.
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 will slide across the Mid-Atlantic today before
becoming centered offshore through tonight. A cold front crosses
our area later tonight and Friday, then high pressure builds in
over the weekend and early next week. An area of low pressure
may develop off the southeast coast next week.

.REST OF TODAY...

Sky/weather.........Mostly cloudy (65-75 percent) then becoming
                    mostly sunny (25-35 percent).
Max temperature.....Around 79.
Min humidity........42 percent.
Wind shift..........None expected
Wind (20 ft)........Southwest winds 5 to 7 mph.
Mixing height.......7500 ft AGL.
Transport winds.....Southwest 12 to 16 mph.
Smoke dispersal.....Good (43800 knot-ft) early in the morning
                    increasing to excellent (105500 knot-ft) in the
                    afternoon.
ADI.................64 early in the morning increasing to 127 in
                    the afternoon.

TIME (EDT)      11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........83  83  81  76  57  36  26
Temp............74  75  77  77  77  77  77
RH..............50  48  43  42  42  42  42
20 FT wind dir..SW  SW  SW  SW  SW  SW  S
20 FT wind spd..7   8   10  12  12  10  10
20 FT wind gust.12  14  17  20  20  18  18
Mix hgt (kft)...4.4 6.2 6.6 6.5 7.1 7.5 6.4
Transp wind dir.SW  SW  SW  SW  SW  SW  SW
Transp wind spd.12  14  15  15  15  16  15
ADI.............64  104 119 106 114 127 104
Vrate kt-ft/1K..44  74  85  84  92  106 83
Ventrate Cat....FR  GD  GD  GD  GD  VGD GD

.TONIGHT...

Sky/weather.........Partly cloudy (30-40 percent) then becoming
                    mostly cloudy (60-70 percent).
Min temperature.....Around 60.
Max humidity........84 percent.
Wind shift..........None expected
Wind (20 ft)........South winds 5 to 6 mph.
Mixing height.......400 ft AGL.
Transport winds.....South 10 to 16 mph.
Smoke dispersal.....Good (51600 knot-ft) early in the evening
                    decreasing to poor (3500 knot-ft) late in the
                    night.
ADI.................75 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 (%).........28  38  53  65  73  77  78  74  74  67  59  53
Temp............76  74  70  67  66  65  65  65  64  63  62  61
RH..............43  46  53  59  61  65  68  70  75  75  72  75
20 FT wind dir..S   S   S   S   S   S   S   S   S   SW  SW  SW
20 FT wind spd..10  10  12  12  12  12  10  9   8   7   7   7
20 FT wind gust.18  20  21  20  20  20  17  16  15  14  13  13
Mix hgt (kft)...4.7 0.9 0.5 0.4 0.4 0.5 0.5 0.4 0.4 0.4 0.4 0.4
Transp wind dir.SW  S   S   S   S   S   S   S   S   S   SW  SW
Transp wind spd.13  10  10  13  15  16  15  14  14  13  13  10
ADI.............75  5   5   6   10  11  10  9   9   6   6   7
Vrate kt-ft/1K..52  8   5   5   6   7   6   5   5   5   4   4
Ventrate Cat....FR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

.FRIDAY...

Sky/weather.........Sunny (20-30 percent).
Max temperature.....Around 79.
Min humidity........48 percent.
Wind shift..........Southwest becoming west
Wind (20 ft)........Southwest winds around 5 mph early in the
                    morning becoming light, then becoming west 5 to
                    7 mph in the late morning and afternoon.
Mixing height.......6100 ft AGL.
Transport winds.....West 9 to 15 mph.
Smoke dispersal.....Poor (2900 knot-ft) early in the morning
                    increasing to excellent (77600 knot-ft) in the
                    afternoon.
ADI.................5 early in the morning increasing to 101 in the
                    afternoon.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........39  25  11  13  15  17  21  24  28  29  31  32
Temp............60  61  65  69  72  74  76  77  78  78  78  77
RH..............81  84  78  70  61  55  52  50  48  48  48  50
20 FT wind dir..SW  SW  W   W   W   W   W   W   W   W   W   W
20 FT wind spd..6   5   3   5   6   7   8   9   10  10  10  9
20 FT wind gust.10  9   7   8   10  13  14  16  17  17  17  16
Mix hgt (kft)...0.4 0.4 0.4 1.7 3.0 4.1 5.0 5.6 5.9 6.1 6.0 5.3
Transp wind dir.SW  SW  W   W   W   W   W   W   W   W   W   W
Transp wind spd.10  9   9   13  14  14  15  15  15  15  14  13
ADI.............5   9   9   28  53  72  86  94  98  101 92  77
Vrate kt-ft/1K..4   3   3   19  36  49  62  72  76  78  72  59
Ventrate Cat....PR  PR  PR  PR  PR  FR  GD  GD  GD  GD  GD  FR

$$
Forecaster...Kruzdlo
Requested by...Erich Burkentine
Type of request...PRESCRIBED
.TAG 2520896.0/PHI
.DELDT 08/28/25
.FormatterVersion 2.0.0
.EMAIL erich.burkentine@delaware.gov