175
FNUS51 KPBZ 180450
FWFPBZ
FIRE WEATHER PLANNING FORECAST
NATIONAL WEATHER SERVICE PITTSBURGH PA
1250 AM EDT TUE AUG 18 2026
DISCUSSION
COOLER AND NOTABLY DRIER NORTHWEST FLOW IN THE WAKE OF THE EXITING
FRONT RESULTS IN SLIGHTLY COOLER THAN NORMAL TEMPERATURE WITH LOW
HUMIDITIES AND LIGHTER NORTHWEST WINDS TODAY.
THE NEXT SHORTWAVE TROUGH AND COLD FRONT RETURNS SHOWER AND LOWER
PROBABILITY THUNDERSTORM CHANCES WEDNESDAY INTO THURSDAY.
OHZ039-182045-
TUSCARAWAS-
INCLUDING THE CITIES OF NEW PHILADELPHIA AND DOVER
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 60
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 78 (-3) 60 (-2) 77
RH % (24H TREND) 58 (-15) 100 (0) 74
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 6
PRECIP AMOUNT 0.00 0.00 0.09
PRECIP DURATION 2
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1540 1270
MIXING HGT(FT-AGL/MSL)5040 4160
TRANSPORT WND (MPH) NW 6 W 13
VENT RATE (KT-FT) 25200 45760
CATEGORY DAY 3 3
INVERSION 69F/10AM 8PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 25 FAIR 3 VERY POOR 36 FAIR
MAX ADI LATE 48 GEN GOOD 3 VERY POOR 37 FAIR
MAX LVORI EARLY 9 6 8
MAX LVORI LATE 3 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ040-182045-
CARROLL-
INCLUDING THE CITIES OF CARROLLTON AND MALVERN
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 60
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 78 (-3) 60 (-1) 77
RH % (24H TREND) 56 (-14) 98 (-2) 73
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR W 7
PRECIP AMOUNT 0.00 0.00 0.07
PRECIP DURATION 2
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1500 1220
MIXING HGT(FT-AGL/MSL)4930 3990
TRANSPORT WND (MPH) NW 6 W 13
VENT RATE (KT-FT) 24650 43890
CATEGORY DAY 3 3
INVERSION 69F/10AM 8PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 29 FAIR 3 VERY POOR 40 FAIR
MAX ADI LATE 53 GEN GOOD 3 VERY POOR 41 GEN GOOD
MAX LVORI EARLY 9 6 7
MAX LVORI LATE 2 8 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ041-182045-
COLUMBIANA-
INCLUDING THE CITIES OF EAST LIVERPOOL, SALEM, AND COLUMBIANA
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 60
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 78 (-5) 60 (-1) 78
RH % (24H TREND) 54 (-13) 96 (-4) 71
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR W 7
PRECIP AMOUNT 0.00 0.00 0.05
PRECIP DURATION 2
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1510 1150
MIXING HGT(FT-AGL/MSL)4950 3790
TRANSPORT WND (MPH) NW 7 W 13
VENT RATE (KT-FT) 29700 41690
CATEGORY DAY 3 3
INVERSION 70F/10AM 8PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 37 FAIR 4 VERY POOR 43 GEN GOOD
MAX ADI LATE 61 GOOD 4 VERY POOR 45 GEN GOOD
MAX LVORI EARLY 8 6 6
MAX LVORI LATE 1 8 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ048-182045-
COSHOCTON-
INCLUDING THE CITY OF COSHOCTON
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 60
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 78 (-3) 59 (-2) 77
RH % (24H TREND) 60 (-16) 100 (0) 76
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 5
PRECIP AMOUNT 0.00 0.00 0.05
PRECIP DURATION 2
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1490 1170
MIXING HGT(FT-AGL/MSL)4880 3830
TRANSPORT WND (MPH) NW 6 W 12
VENT RATE (KT-FT) 24400 38300
CATEGORY DAY 3 3
INVERSION 69F/10AM 7PM 65F/9AM
DISPERSION 3 3
MAX ADI EARLY 18 GEN POOR 3 VERY POOR 30 FAIR
MAX ADI LATE 41 GEN GOOD 3 VERY POOR 35 FAIR
MAX LVORI EARLY 9 7 8
MAX LVORI LATE 3 9 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ049-182045-
HARRISON-
INCLUDING THE CITY OF CADIZ
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE NONE SHOWERS
CHANCE PRECIP (%) 0 0 50
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 78 (-5) 60 (-2) 78
RH % (24H TREND) 55 (-13) 100 (0) 71
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 6
PRECIP AMOUNT 0.00 0.00 0.04
PRECIP DURATION 1
PRECIP BEGIN 3 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1530 1260
MIXING HGT(FT-AGL/MSL)5020 4120
TRANSPORT WND (MPH) NW 7 W 13
VENT RATE (KT-FT) 30120 45320
CATEGORY DAY 3 3
INVERSION 70F/10AM 7PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 21 FAIR 3 VERY POOR 41 GEN GOOD
MAX ADI LATE 50 GEN GOOD 3 VERY POOR 43 GEN GOOD
MAX LVORI EARLY 9 6 8
MAX LVORI LATE 3 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ050-182045-
JEFFERSON OH-
INCLUDING THE CITY OF STEUBENVILLE
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE NONE SHOWERS
CHANCE PRECIP (%) 0 0 50
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 79 (-3) 60 (-2) 78
RH % (24H TREND) 53 (-17) 98 (-2) 68
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 7
PRECIP AMOUNT 0.00 0.00 0.05
PRECIP DURATION 1
PRECIP BEGIN 3 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1490 1210
MIXING HGT(FT-AGL/MSL)4900 3980
TRANSPORT WND (MPH) NW 7 W 13
VENT RATE (KT-FT) 29400 43780
CATEGORY DAY 3 3
INVERSION 70F/10AM 8PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 27 FAIR 3 VERY POOR 41 GEN GOOD
MAX ADI LATE 54 GEN GOOD 3 VERY POOR 44 GEN GOOD
MAX LVORI EARLY 9 6 7
MAX LVORI LATE 2 8 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ057-182045-
MUSKINGUM-
INCLUDING THE CITY OF ZANESVILLE
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 30
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 78 (-3) 60 (-3) 77
RH % (24H TREND) 62 (-17) 100 (0) 75
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 5
PRECIP AMOUNT 0.00 0.00 0.03
PRECIP DURATION 1
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1470 1160
MIXING HGT(FT-AGL/MSL)4830 3800
TRANSPORT WND (MPH) NW 6 W 12
VENT RATE (KT-FT) 24150 38000
CATEGORY DAY 3 3
INVERSION 70F/10AM 7PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 13 GEN POOR 3 VERY POOR 27 FAIR
MAX ADI LATE 43 GEN GOOD 3 VERY POOR 33 FAIR
MAX LVORI EARLY 9 8 8
MAX LVORI LATE 3 9 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ058-182045-
GUERNSEY-
INCLUDING THE CITY OF CAMBRIDGE
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE SHOWERS
CHANCE PRECIP (%) 0 0 40
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 78 (-5) 60 (-3) 78
RH % (24H TREND) 58 (-15) 100 (0) 71
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 5
PRECIP AMOUNT 0.00 0.00 0.02
PRECIP DURATION 1
PRECIP BEGIN 3 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1540 1250
MIXING HGT(FT-AGL/MSL)5050 4110
TRANSPORT WND (MPH) NW 6 W 12
VENT RATE (KT-FT) 25250 41100
CATEGORY DAY 3 3
INVERSION 70F/10AM 7PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 15 GEN POOR 3 VERY POOR 32 FAIR
MAX ADI LATE 46 GEN GOOD 3 VERY POOR 35 FAIR
MAX LVORI EARLY 9 8 9
MAX LVORI LATE 3 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ059-182045-
BELMONT-
INCLUDING THE CITIES OF MARTINS FERRY AND ST. CLAIRSVILLE
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 79 (-4) 60 (-4) 79
RH % (24H TREND) 57 (-14) 99 (-1) 69
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 6
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1470 1220
MIXING HGT(FT-AGL/MSL)4820 4000
TRANSPORT WND (MPH) NW 7 W 13
VENT RATE (KT-FT) 28920 44000
CATEGORY DAY 3 3
INVERSION 70F/10AM 7PM 67F/9AM
DISPERSION 3 3
MAX ADI EARLY 17 GEN POOR 3 VERY POOR 38 FAIR
MAX ADI LATE 50 GEN GOOD 3 VERY POOR 39 FAIR
MAX LVORI EARLY 9 8 8
MAX LVORI LATE 3 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ068-182045-
NOBLE-
INCLUDING THE CITY OF CALDWELL
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE SHOWERS
CHANCE PRECIP (%) 0 0 20
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 78 (-3) 60 (-4) 79
RH % (24H TREND) 60 (-21) 100 (0) 71
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 5
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION 0
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1500 1270
MIXING HGT(FT-AGL/MSL)4930 4170
TRANSPORT WND (MPH) NW 7 W 12
VENT RATE (KT-FT) 29580 41700
CATEGORY DAY 3 3
INVERSION 70F/10AM 7PM 67F/9AM
DISPERSION 3 3
MAX ADI EARLY 14 GEN POOR 3 VERY POOR 34 FAIR
MAX ADI LATE 42 GEN GOOD 3 VERY POOR 37 FAIR
MAX LVORI EARLY 9 8 9
MAX LVORI LATE 3 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ069-182045-
MONROE-
INCLUDING THE CITY OF WOODSFIELD
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE SHOWERS
CHANCE PRECIP (%) 0 0 20
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 79 (-2) 61 (-4) 79
RH % (24H TREND) 59 (-21) 100 (0) 69
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION 0
PRECIP BEGIN 3 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1490 1260
MIXING HGT(FT-AGL/MSL)4890 4140
TRANSPORT WND (MPH) NW 7 W 12
VENT RATE (KT-FT) 29340 41400
CATEGORY DAY 3 3
INVERSION 71F/10AM 7PM 67F/9AM
DISPERSION 3 3
MAX ADI EARLY 15 GEN POOR 3 VERY POOR 35 FAIR
MAX ADI LATE 47 GEN GOOD 3 VERY POOR 39 FAIR
MAX LVORI EARLY 8 8 9
MAX LVORI LATE 3 10 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ007-182045-
MERCER-
INCLUDING THE CITIES OF SHARON, HERMITAGE, AND GROVE CITY
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 70
CHANCE OF THUNDER (%) 0 0 30
TEMP (24H TREND) 79 (+1) 59 (-2) 78
RH % (24H TREND) 52 (-16) 97 (-3) 71
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR SW 5
WIND 20FT/LATE(MPH) NW 6 LGT/VAR W 7
PRECIP AMOUNT 0.00 0.00 0.04
PRECIP DURATION 2
PRECIP BEGIN 8 AM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1600 1180
MIXING HGT(FT-AGL/MSL)5250 3860
TRANSPORT WND (MPH) NW 9 W 14
VENT RATE (KT-FT) 42000 46320
CATEGORY DAY 3 3
INVERSION 65F/9AM 8PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 45 GEN GOOD 4 VERY POOR 32 FAIR
MAX ADI LATE 63 GOOD 4 VERY POOR 45 GEN GOOD
MAX LVORI EARLY 9 5 6
MAX LVORI LATE 1 7 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ008-182045-
VENANGO-
INCLUDING THE CITIES OF OIL CITY AND FRANKLIN
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 70
CHANCE OF THUNDER (%) 0 0 30
TEMP (24H TREND) 77 (-2) 58 (-3) 77
RH % (24H TREND) 56 (-14) 97 (-3) 75
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 5 LGT/VAR W 6
PRECIP AMOUNT 0.00 0.00 0.06
PRECIP DURATION 4
PRECIP BEGIN 8 AM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1580 1210
MIXING HGT(FT-AGL/MSL)5190 3970
TRANSPORT WND (MPH) NW 9 W 14
VENT RATE (KT-FT) 41520 47640
CATEGORY DAY 3 3
INVERSION 63F/9AM 7PM 64F/9AM
DISPERSION 3 3
MAX ADI EARLY 40 FAIR 4 VERY POOR 36 FAIR
MAX ADI LATE 67 GOOD 4 VERY POOR 44 GEN GOOD
MAX LVORI EARLY 9 6 6
MAX LVORI LATE 1 7 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ009-182045-
FOREST-
INCLUDING THE CITY OF TIONESTA
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 70
CHANCE OF THUNDER (%) 0 0 30
TEMP (24H TREND) 78 (-2) 56 (-4) 77
RH % (24H TREND) 51 (-19) 96 (-4) 69
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR W 5
PRECIP AMOUNT 0.00 0.00 0.05
PRECIP DURATION 4
PRECIP BEGIN 8 AM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1550 1230
MIXING HGT(FT-AGL/MSL)5080 4040
TRANSPORT WND (MPH) NW 9 W 14
VENT RATE (KT-FT) 40640 48480
CATEGORY DAY 3 3
INVERSION 63F/9AM 7PM 63F/9AM
DISPERSION 3 3
MAX ADI EARLY 26 FAIR 4 VERY POOR 38 FAIR
MAX ADI LATE 67 GOOD 4 VERY POOR 52 GEN GOOD
MAX LVORI EARLY 9 7 6
MAX LVORI LATE 1 7 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ013-182045-
LAWRENCE-
INCLUDING THE CITIES OF NEW CASTLE AND ELLWOOD CITY
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 50
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 80 (-1) 59 (-2) 79
RH % (24H TREND) 51 (-16) 97 (-3) 69
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR W 6
PRECIP AMOUNT 0.00 0.00 0.03
PRECIP DURATION 1
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1590 1170
MIXING HGT(FT-AGL/MSL)5220 3830
TRANSPORT WND (MPH) NW 8 W 14
VENT RATE (KT-FT) 36540 45960
CATEGORY DAY 3 3
INVERSION 65F/9AM 8PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 41 GEN GOOD 4 VERY POOR 42 GEN GOOD
MAX ADI LATE 64 GOOD 4 VERY POOR 46 GEN GOOD
MAX LVORI EARLY 9 6 6
MAX LVORI LATE 1 8 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ014-182045-
BUTLER-
INCLUDING THE CITY OF BUTLER
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 40
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 79 (-2) 58 (-3) 79
RH % (24H TREND) 57 (-15) 97 (-3) 70
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 5 LGT/VAR W 7
PRECIP AMOUNT 0.00 0.00 0.01
PRECIP DURATION 1
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1550 1310
MIXING HGT(FT-AGL/MSL)5090 4300
TRANSPORT WND (MPH) NW 9 W 14
VENT RATE (KT-FT) 40720 51600
CATEGORY DAY 3 3
INVERSION 65F/9AM 8PM 65F/9AM
DISPERSION 3 3
MAX ADI EARLY 34 FAIR 4 VERY POOR 40 FAIR
MAX ADI LATE 66 GOOD 3 VERY POOR 47 GEN GOOD
MAX LVORI EARLY 9 6 7
MAX LVORI LATE 1 8 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ015-182045-
CLARION-
INCLUDING THE CITY OF CLARION
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 60
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 78 (-3) 58 (-3) 77
RH % (24H TREND) 54 (-18) 97 (-3) 69
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 5 LGT/VAR SW 6
PRECIP AMOUNT 0.00 0.00 0.03
PRECIP DURATION 2
PRECIP BEGIN 8 AM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1570 1230
MIXING HGT(FT-AGL/MSL)5140 4030
TRANSPORT WND (MPH) NW 9 W 14
VENT RATE (KT-FT) 41120 48360
CATEGORY DAY 3 3
INVERSION 64F/9AM 7PM 64F/9AM
DISPERSION 3 3
MAX ADI EARLY 27 FAIR 4 VERY POOR 41 GEN GOOD
MAX ADI LATE 61 GOOD 4 VERY POOR 46 GEN GOOD
MAX LVORI EARLY 9 7 6
MAX LVORI LATE 2 7 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ016-182045-
JEFFERSON PA-
INCLUDING THE CITIES OF PUNXSUTAWNEY AND BROOKVILLE
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 50
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 77 (-4) 57 (-3) 76
RH % (24H TREND) 54 (-16) 97 (-3) 68
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 5 LGT/VAR W 7
PRECIP AMOUNT 0.00 0.00 0.01
PRECIP DURATION 1
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1540 1190
MIXING HGT(FT-AGL/MSL)5060 3900
TRANSPORT WND (MPH) NW 9 W 14
VENT RATE (KT-FT) 40480 46800
CATEGORY DAY 3 3
INVERSION 64F/9AM 7PM 64F/9AM
DISPERSION 3 3
MAX ADI EARLY 25 FAIR 4 VERY POOR 41 GEN GOOD
MAX ADI LATE 61 GOOD 4 VERY POOR 50 GEN GOOD
MAX LVORI EARLY 9 6 6
MAX LVORI LATE 2 7 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ020-182045-
BEAVER-
INCLUDING THE CITIES OF ALIQUIPPA, BEAVER FALLS, AMBRIDGE,
AND MONACA
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 50
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 79 (-4) 60 (-2) 79
RH % (24H TREND) 52 (-16) 96 (-4) 68
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR W 6
PRECIP AMOUNT 0.00 0.00 0.04
PRECIP DURATION 1
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1500 1250
MIXING HGT(FT-AGL/MSL)4930 4100
TRANSPORT WND (MPH) NW 8 W 13
VENT RATE (KT-FT) 34510 45100
CATEGORY DAY 3 3
INVERSION 66F/9AM 8PM 67F/9AM
DISPERSION 3 3
MAX ADI EARLY 32 FAIR 4 VERY POOR 42 GEN GOOD
MAX ADI LATE 62 GOOD 3 VERY POOR 48 GEN GOOD
MAX LVORI EARLY 9 5 6
MAX LVORI LATE 1 7 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ021-182045-
ALLEGHENY-
INCLUDING THE CITY OF PITTSBURGH METRO AREA
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 80 (-3) 60 (-4) 80
RH % (24H TREND) 54 (-18) 98 (-2) 66
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 5 LGT/VAR W 9
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1530 1410
MIXING HGT(FT-AGL/MSL)5020 4620
TRANSPORT WND (MPH) NW 8 W 14
VENT RATE (KT-FT) 35140 55440
CATEGORY DAY 3 4
INVERSION 66F/9AM 7PM 67F/9AM
DISPERSION 3 4
MAX ADI EARLY 25 FAIR 4 VERY POOR 40 FAIR
MAX ADI LATE 56 GEN GOOD 3 VERY POOR 48 GEN GOOD
MAX LVORI EARLY 9 5 6
MAX LVORI LATE 3 7 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ022-182045-
ARMSTRONG-
INCLUDING THE CITIES OF KITTANNING AND FORD CITY
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 30
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 80 (-2) 58 (-3) 80
RH % (24H TREND) 56 (-16) 100 (0) 68
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 5 LGT/VAR SW 7
PRECIP AMOUNT 0.00 0.00 0.01
PRECIP DURATION 1
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1530 1340
MIXING HGT(FT-AGL/MSL)5030 4390
TRANSPORT WND (MPH) NW 8 W 15
VENT RATE (KT-FT) 35210 57070
CATEGORY DAY 3 4
INVERSION 65F/9AM 7PM 65F/9AM
DISPERSION 3 4
MAX ADI EARLY 27 FAIR 4 VERY POOR 40 FAIR
MAX ADI LATE 60 GEN GOOD 3 VERY POOR 49 GEN GOOD
MAX LVORI EARLY 9 7 7
MAX LVORI LATE 2 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ029-182045-
WASHINGTON-
INCLUDING THE CITIES OF WASHINGTON AND CANONSBURG
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 78 (-4) 60 (-4) 78
RH % (24H TREND) 56 (-17) 97 (-3) 68
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 5 LGT/VAR SW 8
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1450 1180
MIXING HGT(FT-AGL/MSL)4770 3860
TRANSPORT WND (MPH) NW 7 W 13
VENT RATE (KT-FT) 28620 42460
CATEGORY DAY 3 3
INVERSION 70F/10AM 7PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 20 GEN POOR 3 VERY POOR 42 GEN GOOD
MAX ADI LATE 55 GEN GOOD 3 VERY POOR 47 GEN GOOD
MAX LVORI EARLY 9 6 6
MAX LVORI LATE 3 8 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ031-182045-
GREENE-
INCLUDING THE CITY OF WAYNESBURG
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 77 (-3) 59 (-6) 79
RH % (24H TREND) 63 (-17) 99 (-1) 66
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 6
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1440 1240
MIXING HGT(FT-AGL/MSL)4730 4070
TRANSPORT WND (MPH) NW 7 W 13
VENT RATE (KT-FT) 28380 44770
CATEGORY DAY 3 3
INVERSION 70F/10AM 7PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 15 GEN POOR 3 VERY POOR 45 GEN GOOD
MAX ADI LATE 55 GEN GOOD 3 VERY POOR 57 GEN GOOD
MAX LVORI EARLY 9 7 8
MAX LVORI LATE 3 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ073-182045-
WESTMORELAND-
INCLUDING THE CITIES OF MURRYSVILLE, GREENSBURG, NEW KENSINGTON,
LOWER BURRELL, LATROBE, AND MONESSEN
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 79 (-3) 59 (-4) 80
RH % (24H TREND) 57 (-17) 100 (0) 67
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR SW 5
WIND 20FT/LATE(MPH) NW 6 LGT/VAR SW 9
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1400 1310
MIXING HGT(FT-AGL/MSL)4590 4290
TRANSPORT WND (MPH) NW 8 W 14
VENT RATE (KT-FT) 32130 51480
CATEGORY DAY 3 3
INVERSION 67F/9AM 7PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 20 GEN POOR 4 VERY POOR 42 GEN GOOD
MAX ADI LATE 57 GEN GOOD 3 VERY POOR 45 GEN GOOD
MAX LVORI EARLY 9 7 8
MAX LVORI LATE 3 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ074-182045-
HIGHER ELEVATIONS OF WESTMORELAND-
INCLUDING THE CITIES OF LIGONIER AND DONEGAL
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 78 (0) 58 (-5) 79
RH % (24H TREND) 57 (-26) 99 (-1) 61
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 5 LGT/VAR W 8
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1290 1200
MIXING HGT(FT-AGL/MSL)4230 3940
TRANSPORT WND (MPH) NW 9 W 14
VENT RATE (KT-FT) 33840 47280
CATEGORY DAY 3 3
INVERSION 69F/10AM 7PM 65F/9AM
DISPERSION 3 3
MAX ADI EARLY 22 FAIR 4 VERY POOR 48 GEN GOOD
MAX ADI LATE 61 GOOD 3 VERY POOR 54 GEN GOOD
MAX LVORI EARLY 9 7 7
MAX LVORI LATE 3 8 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ075-182045-
FAYETTE-
INCLUDING THE CITY OF UNIONTOWN
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 77 (-5) 59 (-6) 79
RH % (24H TREND) 63 (-8) 99 (-1) 66
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 7
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1360 1210
MIXING HGT(FT-AGL/MSL)4460 3980
TRANSPORT WND (MPH) NW 8 SW 13
VENT RATE (KT-FT) 31220 43780
CATEGORY DAY 3 3
INVERSION 67F/9AM 7PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 17 GEN POOR 3 VERY POOR 47 GEN GOOD
MAX ADI LATE 55 GEN GOOD 3 VERY POOR 58 GEN GOOD
MAX LVORI EARLY 9 7 7
MAX LVORI LATE 3 8 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ076-182045-
HIGHER ELEVATIONS OF FAYETTE-
INCLUDING THE CITIES OF CHAMPION AND OHIOPYLE
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 77 (-1) 57 (-5) 79
RH % (24H TREND) 58 (-25) 100 (0) 62
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR W 5
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1210 1210
MIXING HGT(FT-AGL/MSL)3970 3980
TRANSPORT WND (MPH) NW 9 W 13
VENT RATE (KT-FT) 31760 43780
CATEGORY DAY 3 3
INVERSION 68F/10AM 7PM 65F/9AM
DISPERSION 3 3
MAX ADI EARLY 17 GEN POOR 4 VERY POOR 45 GEN GOOD
MAX ADI LATE 53 GEN GOOD 3 VERY POOR 63 GOOD
MAX LVORI EARLY 9 7 7
MAX LVORI LATE 3 9 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ077-182045-
INDIANA-
INCLUDING THE CITY OF INDIANA
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 20
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 79 (-1) 58 (-4) 79
RH % (24H TREND) 59 (-19) 99 (-1) 68
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 5 LGT/VAR SW 8
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION 0
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1440 1300
MIXING HGT(FT-AGL/MSL)4710 4260
TRANSPORT WND (MPH) NW 9 W 15
VENT RATE (KT-FT) 37680 55380
CATEGORY DAY 3 4
INVERSION 70F/10AM 7PM 65F/9AM
DISPERSION 3 4
MAX ADI EARLY 24 FAIR 4 VERY POOR 43 GEN GOOD
MAX ADI LATE 59 GEN GOOD 3 VERY POOR 51 GEN GOOD
MAX LVORI EARLY 9 7 7
MAX LVORI LATE 3 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ078-182045-
HIGHER ELEVATIONS OF INDIANA-
INCLUDING THE CITY OF ARMAGH
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 77 (-1) 58 (-4) 77
RH % (24H TREND) 59 (-24) 97 (-3) 65
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 5 LGT/VAR W 8
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1350 1290
MIXING HGT(FT-AGL/MSL)4430 4230
TRANSPORT WND (MPH) NW 9 W 15
VENT RATE (KT-FT) 35440 54990
CATEGORY DAY 3 4
INVERSION 69F/10AM 7PM 65F/9AM
DISPERSION 3 4
MAX ADI EARLY 26 FAIR 4 VERY POOR 51 GEN GOOD
MAX ADI LATE 63 GOOD 3 VERY POOR 50 GEN GOOD
MAX LVORI EARLY 9 7 6
MAX LVORI LATE 3 8 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ001-182045-
HANCOCK-
INCLUDING THE CITY OF WEIRTON
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE NONE SHOWERS
CHANCE PRECIP (%) 0 0 50
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 79 (-4) 61 (-1) 78
RH % (24H TREND) 53 (-15) 95 (-5) 68
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR W 6
PRECIP AMOUNT 0.00 0.00 0.03
PRECIP DURATION 1
PRECIP BEGIN 3 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1500 1230
MIXING HGT(FT-AGL/MSL)4910 4050
TRANSPORT WND (MPH) NW 7 W 13
VENT RATE (KT-FT) 29460 44550
CATEGORY DAY 3 3
INVERSION 70F/10AM 8PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 29 FAIR 4 VERY POOR 42 GEN GOOD
MAX ADI LATE 62 GOOD 3 VERY POOR 46 GEN GOOD
MAX LVORI EARLY 9 5 6
MAX LVORI LATE 1 7 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ002-182045-
BROOKE-
INCLUDING THE CITIES OF FOLLANSBEE AND WELLSBURG
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLEAR PCLDY
PRECIP TYPE NONE NONE SHOWERS
CHANCE PRECIP (%) 0 0 40
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 79 (-2) 60 (-3) 79
RH % (24H TREND) 54 (-18) 97 (-3) 68
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 7
PRECIP AMOUNT 0.00 0.00 0.02
PRECIP DURATION 0
PRECIP BEGIN 4 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1490 1170
MIXING HGT(FT-AGL/MSL)4890 3850
TRANSPORT WND (MPH) NW 7 W 13
VENT RATE (KT-FT) 29340 42350
CATEGORY DAY 3 3
INVERSION 70F/10AM 7PM 67F/9AM
DISPERSION 3 3
MAX ADI EARLY 22 FAIR 3 VERY POOR 41 GEN GOOD
MAX ADI LATE 52 GEN GOOD 3 VERY POOR 45 GEN GOOD
MAX LVORI EARLY 9 5 6
MAX LVORI LATE 2 8 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ003-182045-
OHIO-
INCLUDING THE CITY OF WHEELING
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 78 (-5) 60 (-4) 79
RH % (24H TREND) 57 (-12) 98 (-2) 70
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 7
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1450 1170
MIXING HGT(FT-AGL/MSL)4770 3850
TRANSPORT WND (MPH) NW 7 W 13
VENT RATE (KT-FT) 28620 42350
CATEGORY DAY 3 3
INVERSION 70F/10AM 7PM 67F/9AM
DISPERSION 3 3
MAX ADI EARLY 16 GEN POOR 3 VERY POOR 44 GEN GOOD
MAX ADI LATE 50 GEN GOOD 3 VERY POOR 40 FAIR
MAX LVORI EARLY 9 6 7
MAX LVORI LATE 3 8 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ004-182045-
MARSHALL-
INCLUDING THE CITY OF MOUNDSVILLE
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 79 (-2) 61 (-5) 80
RH % (24H TREND) 62 (-19) 98 (-2) 70
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 6
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1440 1230
MIXING HGT(FT-AGL/MSL)4730 4020
TRANSPORT WND (MPH) NW 7 W 12
VENT RATE (KT-FT) 28380 40200
CATEGORY DAY 3 3
INVERSION 70F/10AM 7PM 67F/9AM
DISPERSION 3 3
MAX ADI EARLY 15 GEN POOR 3 VERY POOR 38 FAIR
MAX ADI LATE 48 GEN GOOD 3 VERY POOR 43 GEN GOOD
MAX LVORI EARLY 9 7 8
MAX LVORI LATE 3 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ012-182045-
WETZEL-
INCLUDING THE CITY OF NEW MARTINSVILLE
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 78 (-1) 61 (-5) 78
RH % (24H TREND) 64 (-25) 99 (-1) 71
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 5
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1430 1200
MIXING HGT(FT-AGL/MSL)4700 3950
TRANSPORT WND (MPH) NW 7 W 12
VENT RATE (KT-FT) 28200 39500
CATEGORY DAY 3 3
INVERSION 70F/10AM 7PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 14 GEN POOR 3 VERY POOR 38 FAIR
MAX ADI LATE 48 GEN GOOD 3 VERY POOR 55 GEN GOOD
MAX LVORI EARLY 8 7 9
MAX LVORI LATE 3 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ021-182045-
MARION-
INCLUDING THE CITY OF FAIRMONT
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 78 (-1) 60 (-5) 79
RH % (24H TREND) 67 (-23) 100 (0) 67
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 5
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1380 1320
MIXING HGT(FT-AGL/MSL)4510 4320
TRANSPORT WND (MPH) NW 7 W 12
VENT RATE (KT-FT) 27060 43200
CATEGORY DAY 3 3
INVERSION 70F/10AM 7PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 13 GEN POOR 3 VERY POOR 45 GEN GOOD
MAX ADI LATE 52 GEN GOOD 2 VERY POOR 57 GEN GOOD
MAX LVORI EARLY 8 7 9
MAX LVORI LATE 3 10 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ509-182045-
MONONGALIA-
INCLUDING THE CITY OF MORGANTOWN
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 77 (-2) 60 (-5) 79
RH % (24H TREND) 64 (-23) 100 (0) 66
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 6
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1380 1320
MIXING HGT(FT-AGL/MSL)4530 4320
TRANSPORT WND (MPH) NW 8 W 12
VENT RATE (KT-FT) 31710 43200
CATEGORY DAY 3 3
INVERSION 70F/10AM 7PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 13 GEN POOR 3 VERY POOR 45 GEN GOOD
MAX ADI LATE 52 GEN GOOD 3 VERY POOR 55 GEN GOOD
MAX LVORI EARLY 9 7 9
MAX LVORI LATE 3 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ510-182045-
RIDGES OF EASTERN MONONGALIA AND NORTHWESTERN PRESTON-
INCLUDING THE CITY OF COOPERS ROCK
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 75 (-1) 59 (-5) 77
RH % (24H TREND) 64 (-26) 98 (-2) 65
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SW 5
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1190 1290
MIXING HGT(FT-AGL/MSL)3920 4230
TRANSPORT WND (MPH) NW 8 W 12
VENT RATE (KT-FT) 27440 42300
CATEGORY DAY 3 3
INVERSION 68F/10AM 7PM 65F/9AM
DISPERSION 3 3
MAX ADI EARLY 11 POOR 4 VERY POOR 42 GEN GOOD
MAX ADI LATE 45 GEN GOOD 3 VERY POOR 59 GEN GOOD
MAX LVORI EARLY 9 7 7
MAX LVORI LATE 3 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ511-182045-
PRESTON-
INCLUDING THE CITIES OF KINGWOOD AND BRUCETON MILLS
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 77 (0) 59 (-6) 78
RH % (24H TREND) 62 (-25) 99 (-1) 62
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR W 5
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1220 1300
MIXING HGT(FT-AGL/MSL)4010 4270
TRANSPORT WND (MPH) NW 9 W 13
VENT RATE (KT-FT) 32080 46970
CATEGORY DAY 3 3
INVERSION 70F/10AM 7PM 66F/9AM
DISPERSION 3 3
MAX ADI EARLY 11 POOR 4 VERY POOR 46 GEN GOOD
MAX ADI LATE 52 GEN GOOD 3 VERY POOR 58 GEN GOOD
MAX LVORI EARLY 9 7 7
MAX LVORI LATE 3 9 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ512-182045-
EASTERN PRESTON-
INCLUDING THE CITIES OF TERRA ALTA, ROWLESBURG, AND HAZELTON
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 76 (-1) 58 (-6) 78
RH % (24H TREND) 64 (-22) 99 (-1) 63
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR W 5
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1200 1270
MIXING HGT(FT-AGL/MSL)3950 4170
TRANSPORT WND (MPH) NW 10 W 13
VENT RATE (KT-FT) 35550 45870
CATEGORY DAY 3 3
INVERSION 68F/10AM 7PM 64F/9AM
DISPERSION 3 3
MAX ADI EARLY 12 POOR 5 VERY POOR 47 GEN GOOD
MAX ADI LATE 56 GEN GOOD 3 VERY POOR 68 GOOD
MAX LVORI EARLY 9 7 7
MAX LVORI LATE 3 8 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ513-182045-
WESTERN TUCKER-
INCLUDING THE CITIES OF PARSONS, HENDRICKS, AND SAINT GEORGE
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE NONE
CHANCE PRECIP (%) 30 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 78 (-3) 59 (-7) 80
RH % (24H TREND) 61 (-17) 98 (-2) 59
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.01 0.00 0.00
PRECIP DURATION 0
PRECIP BEGIN 6 AM
PRECIP END 8 AM
MIXING HGT(M-AGL/MSL) 1240 1260
MIXING HGT(FT-AGL/MSL)4070 4140
TRANSPORT WND (MPH) NW 9 W 12
VENT RATE (KT-FT) 32560 41400
CATEGORY DAY 3 3
INVERSION 69F/10AM 7PM 65F/9AM
DISPERSION 3 3
MAX ADI EARLY 12 POOR 4 VERY POOR 42 GEN GOOD
MAX ADI LATE 51 GEN GOOD 3 VERY POOR 69 GOOD
MAX LVORI EARLY 9 7 7
MAX LVORI LATE 4 9 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ514-182045-
EASTERN TUCKER-
INCLUDING THE CITIES OF DAVIS, THOMAS, AND CANAAN VALLEY
1250 AM EDT TUE AUG 18 2026
TODAY TONIGHT WED
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE NONE
CHANCE PRECIP (%) 30 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 74 (-2) 54 (-8) 76
RH % (24H TREND) 70 (-10) 100 (0) 61
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 5 LGT/VAR W 5
PRECIP AMOUNT 0.02 0.00 0.00
PRECIP DURATION 1
PRECIP BEGIN 6 AM
PRECIP END 10 AM
MIXING HGT(M-AGL/MSL) 1140 1260
MIXING HGT(FT-AGL/MSL)3730 4130
TRANSPORT WND (MPH) NW 9 W 14
VENT RATE (KT-FT) 29840 49560
CATEGORY DAY 3 3
INVERSION 65F/9AM 8PM 63F/9AM
DISPERSION 3 3
MAX ADI EARLY 13 GEN POOR 6 VERY POOR 40 FAIR
MAX ADI LATE 53 GEN GOOD 3 VERY POOR 73 GOOD
MAX LVORI EARLY 8 7 7
MAX LVORI LATE 4 9 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
FORECAST FOR DAYS 3 THROUGH 7
THURSDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS AND THUNDERSTORMS.
PATCHY FOG. LOWS IN THE LOWER 60S. HIGHS IN THE UPPER 70S. LIGHT
WINDS.
FRIDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
50S. HIGHS IN THE UPPER 70S. NORTHEAST WINDS AROUND 5 MPH.
SATURDAY
PARTLY CLOUDY. A CHANCE OF SHOWERS. LOWS AROUND 60.
HIGHS IN THE UPPER 70S. SOUTHWEST WINDS 5 TO 10 MPH.
SUNDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS. LOWS AROUND 60.
HIGHS IN THE MID 70S. WEST WINDS 5 TO 10 MPH.
MONDAY
PARTLY CLOUDY. LOWS IN THE UPPER 50S. HIGHS IN THE MID
70S. WEST WINDS 5 TO 10 MPH.
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page