Suppression Forecast
Issued by NWS Pittsburgh, PA

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310
FNUS71 KPBZ 280716
FWSPBZ

Spot Forecast for SGL 039...PGC
National Weather Service Pittsburgh PA
316 AM EDT Mon Jul 28 2025

Forecast is based on ignition time of 0500 EDT on July 28.
If conditions become unrepresentative, contact the National Weather
Service.

.DISCUSSION...

Ares of fog will dissipate this morning, with skies becoming
mostly sunny through the day. Minimum RH levels will drop to
between 50 and 55 percent this afternoon, with a light southwest
to west wind. Patchy fog is again possible tonight, before sunny
and hot weather returns Tuesday. RH levels will be similar to
today`s, with a light wind.

.REST OF TONIGHT...

Sky/weather.........Partly cloudy (35-45 percent). Areas of fog.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 65.
Max humidity........100 percent.
Wind (20 ft)........Light winds.
Mixing height.......600 ft AGL.
Transport winds.....Northwest around 5 mph.
LVORI...............9.
ADI.................2.

TIME (EDT)      5AM
Sky (%).........38
Weather cov.....ARS
Weather type....FOG
Tstm cov........
Chc of pcpn (%).0
Chc of thdr (%).0
Temp............66
RH..............100
20 FT wind dir..N
20 FT wind spd..0
20 FT wind gust.2
Mix hgt (kft)...0.6
Transp wind dir.NW
Transp wind spd.5
LVORI...........9
ADI.............2

.TODAY...

Sky/weather.........Sunny (20-30 percent). Areas of fog early in
                    the morning.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Max temperature.....Around 90.
Min humidity........53 percent.
Wind (20 ft)........Light winds.
Mixing height.......4400 ft AGL.
Transport winds.....Northwest 2 to 5 mph shifting to the southwest
                    3 to 6 mph in the late morning and afternoon,
                    then shifting to the west around 5 mph late in
                    the afternoon.
LVORI...............5.
ADI.................2 to 30.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........41  42  44  33  24  22  14  8   13  4   11  4
Weather cov.....ARS ARS ARS
Weather type....FOG FOG FOG
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   0
Chc of thdr (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............65  66  68  73  77  81  83  85  88  89  89  89
RH..............100 98  100 93  84  73  69  63  58  54  54  53
20 FT wind dir..N   N   N   N   S   SW  SW  W   W   W   W   W
20 FT wind spd..0   0   0   0   1   2   2   2   2   2   2   2
20 FT wind gust.2   2   2   2   2   4   5   4   5   5   5   5
Mix hgt (kft)...0.6 0.6 0.6 0.9 1.6 2.3 2.8 3.3 3.9 4.2 4.4 4.2
Transp wind dir.NW  NW  N   W   SW  SW  SW  SW  W   W   W   W
Transp wind spd.5   3   2   2   3   3   3   5   5   6   5   5
LVORI...........9   9   9   6   4   3   3   2   2   1   2   2
ADI.............4   3   2   3   7   10  13  19  23  30  25  25

.TONIGHT...

Sky/weather.........Mostly clear (10-20 percent). Patchy fog
                    overnight. Patchy fog after 3 am.
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Min temperature.....Around 66.
Max humidity........98 percent.
Wind (20 ft)........Light winds.
Mixing height.......600 ft AGL.
Transport winds.....Northwest 2 to 3 mph shifting to the north
                    around 3 mph overnight, then shifting to the
                    northeast overnight shifting to the west after
                    3 am shifting to the north.
LVORI...............6.
ADI.................1 to 2.

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........9   6   23  16  25  23  25  23  16  7   8   12
Weather cov.....                            PTY     PTY PTY PTY
Weather type....                            FOG     FOG FOG FOG
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   0
Chc of thdr (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............88  87  83  78  76  73  72  71  70  69  68  68
RH..............56  60  69  79  84  89  91  94  93  95  95  95
20 FT wind dir..W   W   SE  SE  S   SW  E   SE  SE  E   SE  SE
20 FT wind spd..2   1   1   1   1   1   1   1   1   1   1   1
20 FT wind gust.4   4   2   2   2   2   2   2   2   2   2   2
Mix hgt (kft)...3.0 2.0 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6 0.6
Transp wind dir.NW  NW  NW  NW  W   W   N   N   NE  W   W   N
Transp wind spd.3   3   3   3   3   2   3   3   3   3   3   3
LVORI...........3   3   3   4   5   6   7   7   7   7   8   8
ADI.............2   2   2   2   2   1   2   2   2   2   2   2

.TUESDAY...

Sky/weather.........Sunny (15-25 percent). Patchy fog early in the
                    morning.
Chance of pcpn......10 percent.
Chance of thunder...9 percent.
Max temperature.....Around 92.
Min humidity........53 percent.
Wind (20 ft)........Light winds.
Mixing height.......4500 ft AGL.
Transport winds.....Southwest 2 to 3 mph shifting to the northeast
                    around 2 mph early in the morning, then
                    shifting to the northwest 2 to 6 mph in the
                    late morning and afternoon.
LVORI...............6.
ADI.................2 to 27.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........9   11  15  9   20  30  28  27  25  25  25  25
Weather cov.....PTY PTY
Weather type....FOG FOG
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   10  10  10  10
Chc of thdr (%).0   0   0   0   0   0   0   0   10  10  10  10
Temp............67  68  72  76  80  85  86  88  90  90  90  90
RH..............96  98  93  87  78  68  64  61  58  55  54  53
20 FT wind dir..E   SE  SE  NE  SE  SW  SW  W   W   W   W   W
20 FT wind spd..1   1   1   1   1   2   3   4   4   4   4   3
20 FT wind gust.2   2   2   4   4   5   6   6   6   6   6   6
Mix hgt (kft)...0.6 0.6 0.6 1.5 2.4 3.1 3.4 3.5 3.6 4.1 4.5 4.5
Transp wind dir.SW  SW  NE  NW  NW  W   W   NW  NW  NW  NW  NW
Transp wind spd.3   2   2   2   2   3   5   6   6   6   5   3
LVORI...........8   9   6   5   4   3   2   2   2   2   2   2
ADI.............3   2   2   4   8   14  19  24  26  27  24  19

$$
Forecaster...WM
Requested by...Shawn Perkins
Type of request...PRESCRIBED
.TAG 2518691.0/PBZ
.DELDT 07/28/25
.FormatterVersion 2.0.0
.EMAIL shperkins@pa.gov