821
FNUS71 KPHI 090958
FWSPHI

Spot Forecast for Jacobsburg Grass Fields...PA Game Commission
National Weather Service Mount Holly NJ
558 AM EDT Wed Sep 9 2026

Forecast is based on ignition time of 1000 EDT on September 09.
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 off the Mid-Atlantic coast remains in control until it
moves out to sea tonight. A cold front crosses through the area on
Thursday into Thursday night. High pressure returns for Friday and
Saturday, followed by another disturbance Saturday night into
Sunday. High pressure builds back in early next week.

.REST OF TODAY...

Sky/weather.........Partly sunny (55-65 percent).
Max temperature.....Around 84.
Min humidity........57 percent.
Wind (20 ft)........Light winds becoming southwest 5 to 9 mph late
                    in the morning.
Mixing height.......3100 ft AGL.
Transport winds.....Southwest 7 to 16 mph.
ADI.................11 to 42.

TIME (EDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........73  55  62  61  70  68  56  51
Weather cov.....
Weather type....
Tstm cov........
Temp............73  76  78  80  81  82  83  83
RH..............76  69  67  62  60  61  59  57
20 FT wind dir..S   SW  SW  SW  SW  SW  SW  SW
20 FT wind spd..3   5   6   7   9   9   9   9
20 FT wind gust.8   12  13  15  16  17  18  18
Mix hgt (kft)...1.3 1.6 2.2 2.7 3.1 2.8 3.1 3.1
Transp wind dir.S   SW  SW  SW  SW  SW  SW  SW
Transp wind spd.7   9   10  12  13  14  15  16
ADI.............11  16  29  35  41  42  37  39

.TONIGHT...

Sky/weather.........Mostly cloudy (65-75 percent). Slight chance of
                    showers overnight. Chance of showers and slight
                    chance of thunderstorms overnight.
Min temperature.....Around 68.
Max humidity........90 percent.
Wind (20 ft)........Southwest winds 7 to 8 mph. Gusty and erratic
                    winds expected near thunderstorms overnight.
Mixing height.......500 ft AGL.
Transport winds.....Southwest 12 to 14 mph.
ADI.................10 to 20.

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........69  61  63  65  63  66  69  64  67  69  78  83
Weather cov.....                            SCH CHC CHC CHC CHC
Weather type....                            RW  RW  RW  RW  RW
Tstm cov........                                SCH SCH SCH SCH
Temp............81  79  76  75  74  73  73  72  72  71  70  69
RH..............60  62  64  66  69  68  68  71  71  73  76  81
20 FT wind dir..SW  S   S   SW  SW  SW  SW  SW  SW  SW  SW  SW
20 FT wind spd..9   8   8   8   8   8   9   9   8   8   9   9
20 FT wind gust.18  16  15  15  16  16  16  15  15  16  17  16
Mix hgt (kft)...1.2 0.8 0.8 0.7 0.5 0.5 0.5 0.8 1.0 0.7 0.8 0.6
Transp wind dir.S   S   SW  SW  SW  SW  SW  SW  SW  SW  W   SW
Transp wind spd.14  14  13  14  14  14  14  13  13  13  12  12
ADI.............20  12  11  12  12  12  12  11  11  11  10  10

.THURSDAY...

Sky/weather.........Partly sunny (50-60 percent). Chance of showers
                    early in the morning. Slight chance of
                    thunderstorms early in the morning. Slight
                    chance of showers early in the morning.
Max temperature.....Around 84.
Min humidity........58 percent.
Wind (20 ft)........West winds 6 to 8 mph. Gusty and erratic winds
                    expected near thunderstorms early in the
                    morning.
Mixing height.......4900 ft AGL.
Transport winds.....West 10 to 15 mph.
ADI.................7 early in the morning increasing to 78 in the
                    afternoon.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........74  61  56  43  52  63  50  40  48  42  46  38
Weather cov.....CHC SCH
Weather type....RW  RW
Tstm cov........SCH SCH
Temp............69  68  70  71  75  77  80  81  82  83  82  81
RH..............81  87  90  90  82  76  69  65  61  59  58  60
20 FT wind dir..SW  SW  W   W   W   W   W   W   W   W   W   W
20 FT wind spd..7   7   7   7   8   7   8   8   8   9   9   8
20 FT wind gust.14  12  10  10  10  12  13  14  14  14  13  10
Mix hgt (kft)...0.5 0.5 0.7 1.2 1.9 2.9 3.2 3.9 4.4 4.7 4.9 3.7
Transp wind dir.W   W   W   W   W   W   W   W   W   W   W   W
Transp wind spd.10  10  10  12  13  14  15  14  15  15  14  15
ADI.............7   8   11  18  24  43  59  65  78  60  56  67

$$
Forecaster...MPS
Requested by...Jonathan Weaver
Type of request...PRESCRIBED
.TAG 2621473.0/PHI
.DELDT 09/09/26
.FormatterVersion 2.0.0
.EMAIL jonweaver@pa.gov