027
FNUS71 KPHI 271903
FWSPHI

Spot Forecast for Clayton Bail fire...Delaware Forest Service
National Weather Service Mount Holly NJ
303 PM EDT Wed Aug 27 2025

Forecast is based on ignition time of 1500 EDT on August 27.
If conditions become unrepresentative, contact the National Weather
Service.

Please contact our office if you have questions
or concerns with this forecast.

.DISCUSSION...
Dry conditions today with an area of high pressure
in control. Winds will be out of the NW at around
5-10 mph with gusts to 15 mph. Winds become light
overnight out of the west at 5 mph or less. By
Thursday winds are out of the SW at around 5-10 mph.

.REST OF TODAY...

Sky/weather.........Sunny (0-5 percent).
Max temperature.....Around 76.
Min humidity........40 percent.
Wind shift.......... NW wind to west wind around 8:00 PM.
Wind (20 ft)........Northwest winds 7 to 8 mph.
Mixing height.......7100 ft AGL.
Transport winds.....Northwest 17 to 18 mph.
Smoke dispersal.....Excellent (94100 knot-ft).
ADI.................119 to 140.

TIME (EDT)      3PM 4PM 5PM
Sky (%).........1   1   3
Weather cov.....
Weather type....
Tstm cov........
Temp............75  75  75
RH..............40  40  40
20 FT wind dir..NW  NW  NW
20 FT wind spd..9   9   8
20 FT wind gust.16  15  14
Mix hgt (kft)...6.9 7.1 6.3
Transp wind dir.NW  W   NW
Transp wind spd.17  18  17
ADI.............128 140 119
Vrate kt-ft/1K..104 114 94
Ventrate Cat....VGD VGD GD

.TONIGHT...

Sky/weather.........Mostly clear (15-25 percent).
Min temperature.....Around 55.
Max humidity........83 percent.
Wind shift..........Northwest wind early with  a southwest wind
                by around 2:00 AM
Wind (20 ft)........Northwest winds around 6 mph early in the
                    evening becoming light.
Mixing height.......400 ft AGL.
Transport winds.....Northwest 7 to 15 mph decreasing to around 5
                    mph late in the evening, then shifting to the
                    southwest 5 to 7 mph late in the evening.
Smoke dispersal.....Excellent (64100 knot-ft) early in the evening
                    decreasing to poor (1600 knot-ft) late in the
                    night.
ADI.................85 early in the evening decreasing to 2 late in
                    the night.

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........2   4   7   5   11  13  14  14  12  16  19  34
Weather cov.....
Weather type....
Tstm cov........
Temp............74  72  68  64  63  61  60  59  59  57  56  56
RH..............43  48  54  60  62  67  69  72  72  75  77  77
20 FT wind dir..NW  NW  W   W   SW  SW  SW  SW  SW  SW  SW  SW
20 FT wind spd..7   5   2   2   2   2   2   1   2   2   2   2
20 FT wind gust.12  8   5   3   3   3       2   3   3   3   3
Mix hgt (kft)...4.9 0.8 0.5 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
Transp wind dir.NW  NW  NW  NW  W   W   SW  SW  SW  SW  SW  SW
Transp wind spd.15  9   7   5   5   5   5   5   6   7   6   6
ADI.............85  4   3   2   2   2   2   2   3   3   3   3
Vrate kt-ft/1K..64  7   3   2   2   2   2   2   2   2   2   2
Ventrate Cat....GD  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

.THURSDAY...

Sky/weather.........Mostly sunny (40-50 percent) then becoming
                    partly sunny (60-70 percent) then becoming
                    sunny (10-20 percent).
Max temperature.....Around 79.
Min humidity........42 percent.
Wind shift.......... No wind shift expected.
Wind (20 ft)........Light winds becoming southwest 5 to 6 mph late
                    in the morning.
Mixing height.......7700 ft AGL.
Transport winds.....Southwest 3 to 12 mph increasing to 13 to 15
                    mph in the afternoon.
Smoke dispersal.....Poor (900 knot-ft) early in the morning
                    increasing to excellent (97300 knot-ft) in the
                    afternoon.
ADI.................3 early in the morning increasing to 118 in the
                    afternoon.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........36  51  55  54  56  75  62  67  51  19  12  15
Weather cov.....
Weather type....
Tstm cov........
Temp............55  56  60  66  70  73  75  76  77  78  78  77
RH..............80  83  78  68  59  51  46  43  43  42  42  43
20 FT wind dir..SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW  SW
20 FT wind spd..2   2   2   2   3   5   6   7   7   7   7   7
20 FT wind gust.3   3   3   5   6   7   9   12  13  13  13  13
Mix hgt (kft)...0.4 0.3 0.3 0.7 1.6 4.3 6.7 7.0 7.7 7.4 7.5 6.1
Transp wind dir.SW  W   W   W   SW  SW  W   SW  SW  SW  SW  SW
Transp wind spd.6   6   3   5   6   10  12  13  14  14  15  15
ADI.............3   6   4   5   12  56  93  95  68  108 118 101
Vrate kt-ft/1K..2   2   1   3   8   39  68  77  92  89  97  79
Ventrate Cat....PR  PR  PR  PR  PR  PR  GD  GD  GD  GD  GD  GD

$$
Forecaster...Guzzo
Requested by...Erich Burkentine
Type of request...PRESCRIBED
.TAG 2520833.0/PHI
.DELDT 08/27/25
.FormatterVersion 2.0.0
.EMAIL erich.burkentine@delaware.gov