833
FNUS51 KPBZ 200507
FWFPBZ
FIRE WEATHER PLANNING FORECAST
NATIONAL WEATHER SERVICE PITTSBURGH PA
107 AM EDT THU AUG 20 2026
DISCUSSION
SHOWERS WITH LOW PROBABILITY THUNDERSTORMS ARE LIKELY MAINLY
DURING THE MORNING HOURS TODAY WITH SHORTWAVE PASSAGE. A BRIEF
BREAK OF DRIER WEATHER WITH SEASONABLE TEMPERATURE IS EXPECTED
FRIDAY, THOUGH AFTERNOON SHOWERS COULD DEVELOP ALONG THE HIGHER
TERRAIN.
ADDITIONAL ROUNDS OF RAIN ARE FAVORED THIS WEEKEND.
OHZ039-202030-
TUSCARAWAS-
INCLUDING THE CITIES OF NEW PHILADELPHIA AND DOVER
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS NONE NONE
CHANCE PRECIP (%) 80 0 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 77 (0) 59 (-3) 80
RH % (24H TREND) 76 (+9) 100 (0) 63
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.26 0.00 0.00
PRECIP DURATION 5
PRECIP BEGIN 6 AM
PRECIP END 6 PM
MIXING HGT(M-AGL/MSL) 1100 1390
MIXING HGT(FT-AGL/MSL)3620 4560
TRANSPORT WND (MPH) N 10 S 5
VENT RATE (KT-FT) 32580 18240
CATEGORY DAY 3 2
INVERSION 68F/10AM 8PM 64F/9AM
DISPERSION 3 2
MAX ADI EARLY 9 POOR 5 VERY POOR 28 FAIR
MAX ADI LATE 32 FAIR 4 VERY POOR 35 FAIR
MAX LVORI EARLY 9 7 8
MAX LVORI LATE 5 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ040-202030-
CARROLL-
INCLUDING THE CITIES OF CARROLLTON AND MALVERN
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS NONE NONE
CHANCE PRECIP (%) 80 0 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 76 (-1) 58 (-3) 79
RH % (24H TREND) 76 (+10) 100 (0) 63
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.31 0.00 0.00
PRECIP DURATION 5
PRECIP BEGIN 6 AM
PRECIP END 6 PM
MIXING HGT(M-AGL/MSL) 1090 1370
MIXING HGT(FT-AGL/MSL)3570 4500
TRANSPORT WND (MPH) N 10 SE 5
VENT RATE (KT-FT) 32130 18000
CATEGORY DAY 3 2
INVERSION 68F/10AM 8PM 64F/9AM
DISPERSION 3 2
MAX ADI EARLY 11 POOR 4 VERY POOR 26 FAIR
MAX ADI LATE 26 FAIR 4 VERY POOR 37 FAIR
MAX LVORI EARLY 9 6 8
MAX LVORI LATE 5 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ041-202030-
COLUMBIANA-
INCLUDING THE CITIES OF EAST LIVERPOOL, SALEM, AND COLUMBIANA
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS NONE NONE
CHANCE PRECIP (%) 80 0 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 76 (-2) 57 (-3) 79
RH % (24H TREND) 75 (+15) 100 (0) 62
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.38 0.00 0.00
PRECIP DURATION 5
PRECIP BEGIN 6 AM
PRECIP END 6 PM
MIXING HGT(M-AGL/MSL) 1100 1420
MIXING HGT(FT-AGL/MSL)3600 4660
TRANSPORT WND (MPH) N 10 SE 6
VENT RATE (KT-FT) 32400 23300
CATEGORY DAY 3 3
INVERSION 68F/10AM 8PM 64F/9AM
DISPERSION 3 3
MAX ADI EARLY 13 GEN POOR 4 VERY POOR 28 FAIR
MAX ADI LATE 33 FAIR 4 VERY POOR 46 GEN GOOD
MAX LVORI EARLY 9 6 8
MAX LVORI LATE 4 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ048-202030-
COSHOCTON-
INCLUDING THE CITY OF COSHOCTON
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS NONE NONE
CHANCE PRECIP (%) 80 0 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 77 (0) 58 (-3) 79
RH % (24H TREND) 78 (+9) 100 (0) 68
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.23 0.00 0.00
PRECIP DURATION 5
PRECIP BEGIN 6 AM
PRECIP END 6 PM
MIXING HGT(M-AGL/MSL) 1160 1470
MIXING HGT(FT-AGL/MSL)3820 4840
TRANSPORT WND (MPH) N 9 SW 5
VENT RATE (KT-FT) 30560 19360
CATEGORY DAY 3 2
INVERSION 69F/10AM 8PM 64F/9AM
DISPERSION 3 2
MAX ADI EARLY 7 POOR 4 VERY POOR 25 FAIR
MAX ADI LATE 27 FAIR 4 VERY POOR 29 FAIR
MAX LVORI EARLY 9 8 8
MAX LVORI LATE 6 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ049-202030-
HARRISON-
INCLUDING THE CITY OF CADIZ
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 90 20 20
CHANCE OF THUNDER (%) 20 0 10
TEMP (24H TREND) 76 (-1) 59 (-3) 80
RH % (24H TREND) 80 (+15) 100 (0) 65
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.48 0.00 0.00
PRECIP DURATION 5 0 0
PRECIP BEGIN 6 AM CONTINUING 4 PM
PRECIP END CONTINUING 8 PM 6 PM
MIXING HGT(M-AGL/MSL) 1030 1360
MIXING HGT(FT-AGL/MSL)3380 4480
TRANSPORT WND (MPH) N 9 S 5
VENT RATE (KT-FT) 27040 17920
CATEGORY DAY 3 2
INVERSION 68F/10AM 8PM 65F/9AM
DISPERSION 3 2
MAX ADI EARLY 8 POOR 5 VERY POOR 25 FAIR
MAX ADI LATE 24 FAIR 4 VERY POOR 35 FAIR
MAX LVORI EARLY 9 8 8
MAX LVORI LATE 6 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ050-202030-
JEFFERSON OH-
INCLUDING THE CITY OF STEUBENVILLE
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS NONE TSTMS
CHANCE PRECIP (%) 90 0 20
CHANCE OF THUNDER (%) 20 0 10
TEMP (24H TREND) 76 (-2) 59 (-3) 80
RH % (24H TREND) 79 (+13) 100 (0) 65
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.61 0.00 0.01
PRECIP DURATION 6 0
PRECIP BEGIN 6 AM 3 PM
PRECIP END 6 PM 6 PM
MIXING HGT(M-AGL/MSL) 990 1460
MIXING HGT(FT-AGL/MSL)3260 4790
TRANSPORT WND (MPH) N 9 SE 5
VENT RATE (KT-FT) 26080 19160
CATEGORY DAY 2 2
INVERSION 67F/9AM 8PM 65F/9AM
DISPERSION 2 2
MAX ADI EARLY 9 POOR 5 VERY POOR 24 FAIR
MAX ADI LATE 24 FAIR 4 VERY POOR 37 FAIR
MAX LVORI EARLY 9 7 8
MAX LVORI LATE 5 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ057-202030-
MUSKINGUM-
INCLUDING THE CITY OF ZANESVILLE
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 80 30 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 77 (-1) 60 (-2) 79
RH % (24H TREND) 81 (+10) 100 (0) 70
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.34 0.01 0.00
PRECIP DURATION 5 0
PRECIP BEGIN 6 AM CONTINUING
PRECIP END CONTINUING 9 PM
MIXING HGT(M-AGL/MSL) 1060 1290
MIXING HGT(FT-AGL/MSL)3470 4230
TRANSPORT WND (MPH) N 8 W 5
VENT RATE (KT-FT) 24290 16920
CATEGORY DAY 3 2
INVERSION 69F/10AM 7PM 65F/9AM
DISPERSION 3 2
MAX ADI EARLY 7 POOR 4 VERY POOR 21 FAIR
MAX ADI LATE 26 FAIR 4 VERY POOR 27 FAIR
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 6 9 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ058-202030-
GUERNSEY-
INCLUDING THE CITY OF CAMBRIDGE
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 90 30 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 77 (-1) 60 (-2) 80
RH % (24H TREND) 82 (+13) 100 (0) 68
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.50 0.01 0.00
PRECIP DURATION 5 0
PRECIP BEGIN 6 AM CONTINUING
PRECIP END CONTINUING 9 PM
MIXING HGT(M-AGL/MSL) 1040 1390
MIXING HGT(FT-AGL/MSL)3410 4560
TRANSPORT WND (MPH) N 8 N 5
VENT RATE (KT-FT) 23870 18240
CATEGORY DAY 3 2
INVERSION 69F/10AM 7PM 66F/9AM
DISPERSION 3 2
MAX ADI EARLY 6 VERY POOR 4 VERY POOR 22 FAIR
MAX ADI LATE 24 FAIR 4 VERY POOR 29 FAIR
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 6 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ059-202030-
BELMONT-
INCLUDING THE CITIES OF MARTINS FERRY AND ST. CLAIRSVILLE
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 90 30 20
CHANCE OF THUNDER (%) 20 0 20
TEMP (24H TREND) 76 (-2) 61 (-1) 80
RH % (24H TREND) 82 (+15) 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 0.58 0.00 0.01
PRECIP DURATION 6 0 0
PRECIP BEGIN 6 AM CONTINUING 2 PM
PRECIP END CONTINUING 9 PM 6 PM
MIXING HGT(M-AGL/MSL) 980 1160
MIXING HGT(FT-AGL/MSL)3220 3810
TRANSPORT WND (MPH) N 9 NE 5
VENT RATE (KT-FT) 25760 15240
CATEGORY DAY 2 2
INVERSION 69F/10AM 7PM 66F/9AM
DISPERSION 2 2
MAX ADI EARLY 8 POOR 4 VERY POOR 22 FAIR
MAX ADI LATE 21 FAIR 4 VERY POOR 28 FAIR
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 6 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ068-202030-
NOBLE-
INCLUDING THE CITY OF CALDWELL
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 90 30 0
CHANCE OF THUNDER (%) 30 0 0
TEMP (24H TREND) 77 (-2) 61 (-1) 80
RH % (24H TREND) 85 (+15) 100 (0) 71
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.58 0.01 0.00
PRECIP DURATION 6 0
PRECIP BEGIN 6 AM CONTINUING
PRECIP END CONTINUING 9 PM
MIXING HGT(M-AGL/MSL) 980 1430
MIXING HGT(FT-AGL/MSL)3220 4690
TRANSPORT WND (MPH) N 7 NW 5
VENT RATE (KT-FT) 19320 18760
CATEGORY DAY 2 2
INVERSION 69F/10AM 7PM 67F/9AM
DISPERSION 2 2
MAX ADI EARLY 8 POOR 3 VERY POOR 21 FAIR
MAX ADI LATE 18 GEN POOR 4 VERY POOR 25 FAIR
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 6 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ069-202030-
MONROE-
INCLUDING THE CITY OF WOODSFIELD
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 90 30 20
CHANCE OF THUNDER (%) 30 20 20
TEMP (24H TREND) 77 (-2) 62 (-1) 80
RH % (24H TREND) 86 (+18) 100 (0) 72
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.58 0.00 0.00
PRECIP DURATION 6 0 0
PRECIP BEGIN 6 AM CONTINUING 2 PM
PRECIP END CONTINUING 9 PM CONTINUING
MIXING HGT(M-AGL/MSL) 890 1300
MIXING HGT(FT-AGL/MSL)2930 4270
TRANSPORT WND (MPH) NW 8 N 5
VENT RATE (KT-FT) 20510 17080
CATEGORY DAY 2 2
INVERSION 69F/10AM 7PM 67F/9AM
DISPERSION 2 2
MAX ADI EARLY 9 POOR 3 VERY POOR 18 GEN POOR
MAX ADI LATE 17 GEN POOR 4 VERY POOR 25 FAIR
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 6 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ007-202030-
MERCER-
INCLUDING THE CITIES OF SHARON, HERMITAGE, AND GROVE CITY
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE NONE
CHANCE PRECIP (%) 50 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 77 (-2) 56 (-3) 80
RH % (24H TREND) 67 (+7) 100 (0) 56
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NE 5 LGT/VAR LGT/VAR
PRECIP AMOUNT 0.19 0.00 0.00
PRECIP DURATION 2
PRECIP BEGIN 6 AM
PRECIP END 6 PM
MIXING HGT(M-AGL/MSL) 1150 1530
MIXING HGT(FT-AGL/MSL)3760 5030
TRANSPORT WND (MPH) N 8 SE 7
VENT RATE (KT-FT) 26320 30180
CATEGORY DAY 3 3
INVERSION 68F/10AM 8PM 64F/9AM
DISPERSION 3 3
MAX ADI EARLY 17 GEN POOR 4 VERY POOR 32 FAIR
MAX ADI LATE 33 FAIR 4 VERY POOR 53 GEN GOOD
MAX LVORI EARLY 8 6 8
MAX LVORI LATE 4 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ008-202030-
VENANGO-
INCLUDING THE CITIES OF OIL CITY AND FRANKLIN
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE NONE
CHANCE PRECIP (%) 50 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 75 (-2) 54 (-4) 79
RH % (24H TREND) 72 (+6) 100 (0) 60
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.22 0.00 0.00
PRECIP DURATION 2
PRECIP BEGIN 6 AM
PRECIP END 6 PM
MIXING HGT(M-AGL/MSL) 1130 1520
MIXING HGT(FT-AGL/MSL)3700 4990
TRANSPORT WND (MPH) N 7 SE 7
VENT RATE (KT-FT) 22200 29940
CATEGORY DAY 2 3
INVERSION 66F/10AM 8PM 61F/9AM
DISPERSION 2 3
MAX ADI EARLY 17 GEN POOR 4 VERY POOR 35 FAIR
MAX ADI LATE 32 FAIR 4 VERY POOR 54 GEN GOOD
MAX LVORI EARLY 8 6 8
MAX LVORI LATE 4 9 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ009-202030-
FOREST-
INCLUDING THE CITY OF TIONESTA
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE SHOWERS NONE NONE
CHANCE PRECIP (%) 70 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 76 (-1) 53 (-3) 79
RH % (24H TREND) 69 (+1) 100 (0) 54
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.19 0.00 0.00
PRECIP DURATION 3
PRECIP BEGIN 6 AM
PRECIP END 5 PM
MIXING HGT(M-AGL/MSL) 1070 1610
MIXING HGT(FT-AGL/MSL)3500 5280
TRANSPORT WND (MPH) NE 6 SE 7
VENT RATE (KT-FT) 17500 31680
CATEGORY DAY 2 3
INVERSION 66F/10AM 8PM 61F/9AM
DISPERSION 2 3
MAX ADI EARLY 16 GEN POOR 3 VERY POOR 36 FAIR
MAX ADI LATE 28 FAIR 3 VERY POOR 59 GEN GOOD
MAX LVORI EARLY 9 6 8
MAX LVORI LATE 3 9 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ013-202030-
LAWRENCE-
INCLUDING THE CITIES OF NEW CASTLE AND ELLWOOD CITY
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS NONE NONE
CHANCE PRECIP (%) 60 0 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 77 (-2) 57 (-2) 80
RH % (24H TREND) 72 (+11) 100 (0) 59
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.43 0.00 0.00
PRECIP DURATION 4
PRECIP BEGIN 6 AM
PRECIP END 6 PM
MIXING HGT(M-AGL/MSL) 1140 1510
MIXING HGT(FT-AGL/MSL)3730 4950
TRANSPORT WND (MPH) N 9 SE 7
VENT RATE (KT-FT) 29840 29700
CATEGORY DAY 3 3
INVERSION 69F/10AM 8PM 64F/9AM
DISPERSION 3 3
MAX ADI EARLY 16 GEN POOR 4 VERY POOR 30 FAIR
MAX ADI LATE 33 FAIR 4 VERY POOR 48 GEN GOOD
MAX LVORI EARLY 9 7 8
MAX LVORI LATE 4 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ014-202030-
BUTLER-
INCLUDING THE CITY OF BUTLER
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS NONE TSTMS
CHANCE PRECIP (%) 80 0 20
CHANCE OF THUNDER (%) 20 0 10
TEMP (24H TREND) 76 (-3) 56 (-3) 79
RH % (24H TREND) 78 (+11) 100 (0) 65
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.57 0.00 0.00
PRECIP DURATION 5 0
PRECIP BEGIN 6 AM 4 PM
PRECIP END 6 PM CONTINUING
MIXING HGT(M-AGL/MSL) 1010 1510
MIXING HGT(FT-AGL/MSL)3300 4960
TRANSPORT WND (MPH) N 8 SE 7
VENT RATE (KT-FT) 23100 29760
CATEGORY DAY 3 3
INVERSION 67F/10AM 8PM 63F/9AM
DISPERSION 3 3
MAX ADI EARLY 15 GEN POOR 4 VERY POOR 31 FAIR
MAX ADI LATE 29 FAIR 4 VERY POOR 49 GEN GOOD
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 5 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ015-202030-
CLARION-
INCLUDING THE CITY OF CLARION
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS NONE NONE
CHANCE PRECIP (%) 80 0 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 74 (-3) 55 (-3) 78
RH % (24H TREND) 73 (+1) 100 (0) 59
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.40 0.00 0.00
PRECIP DURATION 5
PRECIP BEGIN 6 AM
PRECIP END 6 PM
MIXING HGT(M-AGL/MSL) 970 1470
MIXING HGT(FT-AGL/MSL)3200 4820
TRANSPORT WND (MPH) N 7 SE 7
VENT RATE (KT-FT) 19200 28920
CATEGORY DAY 2 3
INVERSION 66F/10AM 8PM 62F/9AM
DISPERSION 2 3
MAX ADI EARLY 15 GEN POOR 4 VERY POOR 32 FAIR
MAX ADI LATE 29 FAIR 4 VERY POOR 54 GEN GOOD
MAX LVORI EARLY 8 7 8
MAX LVORI LATE 4 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ016-202030-
JEFFERSON PA-
INCLUDING THE CITIES OF PUNXSUTAWNEY AND BROOKVILLE
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS NONE NONE
CHANCE PRECIP (%) 80 0 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 72 (-4) 54 (-4) 77
RH % (24H TREND) 75 (+3) 100 (0) 60
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.59 0.00 0.00
PRECIP DURATION 5
PRECIP BEGIN 6 AM
PRECIP END 6 PM
MIXING HGT(M-AGL/MSL) 870 1530
MIXING HGT(FT-AGL/MSL)2870 5030
TRANSPORT WND (MPH) NE 7 SE 8
VENT RATE (KT-FT) 17220 35210
CATEGORY DAY 2 3
INVERSION 65F/10AM 7PM 61F/9AM
DISPERSION 2 3
MAX ADI EARLY 14 GEN POOR 4 VERY POOR 34 FAIR
MAX ADI LATE 24 FAIR 3 VERY POOR 57 GEN GOOD
MAX LVORI EARLY 8 7 8
MAX LVORI LATE 4 9 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ020-202030-
BEAVER-
INCLUDING THE CITIES OF ALIQUIPPA, BEAVER FALLS, AMBRIDGE,
AND MONACA
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS NONE TSTMS
CHANCE PRECIP (%) 80 0 20
CHANCE OF THUNDER (%) 20 0 10
TEMP (24H TREND) 76 (-3) 59 (-2) 80
RH % (24H TREND) 78 (+16) 100 (0) 64
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.56 0.00 0.01
PRECIP DURATION 6 0
PRECIP BEGIN 6 AM 4 PM
PRECIP END 6 PM CONTINUING
MIXING HGT(M-AGL/MSL) 1020 1530
MIXING HGT(FT-AGL/MSL)3330 5030
TRANSPORT WND (MPH) N 8 SE 6
VENT RATE (KT-FT) 23310 25150
CATEGORY DAY 3 3
INVERSION 68F/10AM 8PM 65F/9AM
DISPERSION 3 3
MAX ADI EARLY 14 GEN POOR 5 VERY POOR 30 FAIR
MAX ADI LATE 26 FAIR 3 VERY POOR 49 GEN GOOD
MAX LVORI EARLY 9 6 8
MAX LVORI LATE 5 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ021-202030-
ALLEGHENY-
INCLUDING THE CITY OF PITTSBURGH METRO AREA
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS NONE TSTMS
CHANCE PRECIP (%) 90 0 30
CHANCE OF THUNDER (%) 20 0 20
TEMP (24H TREND) 76 (-3) 60 (-3) 80
RH % (24H TREND) 82 (+16) 100 (0) 68
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.80 0.00 0.01
PRECIP DURATION 7 1
PRECIP BEGIN 6 AM 2 PM
PRECIP END 6 PM CONTINUING
MIXING HGT(M-AGL/MSL) 910 1450
MIXING HGT(FT-AGL/MSL)2970 4750
TRANSPORT WND (MPH) N 8 SE 7
VENT RATE (KT-FT) 20790 28500
CATEGORY DAY 2 3
INVERSION 68F/10AM 8PM 66F/9AM
DISPERSION 2 3
MAX ADI EARLY 11 POOR 4 VERY POOR 28 FAIR
MAX ADI LATE 24 FAIR 4 VERY POOR 43 GEN GOOD
MAX LVORI EARLY 9 7 9
MAX LVORI LATE 5 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ022-202030-
ARMSTRONG-
INCLUDING THE CITIES OF KITTANNING AND FORD CITY
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS NONE TSTMS
CHANCE PRECIP (%) 90 0 20
CHANCE OF THUNDER (%) 20 0 10
TEMP (24H TREND) 75 (-4) 57 (-3) 80
RH % (24H TREND) 82 (+9) 100 (0) 66
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.73 0.00 0.00
PRECIP DURATION 6 0
PRECIP BEGIN 6 AM 4 PM
PRECIP END 6 PM CONTINUING
MIXING HGT(M-AGL/MSL) 960 1350
MIXING HGT(FT-AGL/MSL)3160 4440
TRANSPORT WND (MPH) N 7 SE 7
VENT RATE (KT-FT) 18960 26640
CATEGORY DAY 2 3
INVERSION 67F/10AM 7PM 63F/9AM
DISPERSION 2 3
MAX ADI EARLY 13 GEN POOR 4 VERY POOR 30 FAIR
MAX ADI LATE 27 FAIR 4 VERY POOR 57 GEN GOOD
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 5 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ029-202030-
WASHINGTON-
INCLUDING THE CITIES OF WASHINGTON AND CANONSBURG
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 90 30 30
CHANCE OF THUNDER (%) 20 0 20
TEMP (24H TREND) 75 (-3) 60 (-2) 79
RH % (24H TREND) 82 (+14) 100 (0) 71
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.79 0.00 0.02
PRECIP DURATION 7 0 1
PRECIP BEGIN 6 AM CONTINUING 2 PM
PRECIP END CONTINUING 8 PM CONTINUING
MIXING HGT(M-AGL/MSL) 830 1310
MIXING HGT(FT-AGL/MSL)2720 4290
TRANSPORT WND (MPH) NW 9 SE 6
VENT RATE (KT-FT) 21760 21450
CATEGORY DAY 2 2
INVERSION 69F/10AM 7PM 66F/9AM
DISPERSION 2 2
MAX ADI EARLY 10 POOR 4 VERY POOR 24 FAIR
MAX ADI LATE 20 GEN POOR 4 VERY POOR 33 FAIR
MAX LVORI EARLY 9 8 8
MAX LVORI LATE 6 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ031-202030-
GREENE-
INCLUDING THE CITY OF WAYNESBURG
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 90 30 40
CHANCE OF THUNDER (%) 30 20 30
TEMP (24H TREND) 74 (-4) 61 (-1) 78
RH % (24H TREND) 90 (+20) 100 (0) 75
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.79 0.01 0.04
PRECIP DURATION 8 0 1
PRECIP BEGIN 6 AM CONTINUING 2 PM
PRECIP END CONTINUING 9 PM CONTINUING
MIXING HGT(M-AGL/MSL) 760 1170
MIXING HGT(FT-AGL/MSL)2500 3840
TRANSPORT WND (MPH) N 8 SE 5
VENT RATE (KT-FT) 17500 15360
CATEGORY DAY 2 2
INVERSION 69F/10AM 7PM 66F/9AM
DISPERSION 2 2
MAX ADI EARLY 10 POOR 4 VERY POOR 19 GEN POOR
MAX ADI LATE 17 GEN POOR 3 VERY POOR 29 FAIR
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 6 9 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ073-202030-
WESTMORELAND-
INCLUDING THE CITIES OF MURRYSVILLE, GREENSBURG, NEW KENSINGTON,
LOWER BURRELL, LATROBE, AND MONESSEN
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS NONE TSTMS
CHANCE PRECIP (%) 90 0 30
CHANCE OF THUNDER (%) 20 0 20
TEMP (24H TREND) 75 (-4) 59 (-2) 79
RH % (24H TREND) 86 (+17) 100 (0) 70
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR E 5
PRECIP AMOUNT 0.83 0.00 0.01
PRECIP DURATION 8 1
PRECIP BEGIN 6 AM 2 PM
PRECIP END 6 PM CONTINUING
MIXING HGT(M-AGL/MSL) 780 1310
MIXING HGT(FT-AGL/MSL)2540 4290
TRANSPORT WND (MPH) N 8 SE 7
VENT RATE (KT-FT) 17780 25740
CATEGORY DAY 2 2
INVERSION 70F/11AM 8PM 66F/9AM
DISPERSION 2 2
MAX ADI EARLY 9 POOR 5 VERY POOR 28 FAIR
MAX ADI LATE 23 FAIR 4 VERY POOR 47 GEN GOOD
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 6 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ074-202030-
HIGHER ELEVATIONS OF WESTMORELAND-
INCLUDING THE CITIES OF LIGONIER AND DONEGAL
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 100 20 30
CHANCE OF THUNDER (%) 30 0 20
TEMP (24H TREND) 75 (-3) 58 (-2) 79
RH % (24H TREND) 84 (+17) 100 (0) 67
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.79 0.00 0.00
PRECIP DURATION 9 0 0
PRECIP BEGIN 6 AM CONTINUING 3 PM
PRECIP END CONTINUING 8 PM CONTINUING
MIXING HGT(M-AGL/MSL) 580 1210
MIXING HGT(FT-AGL/MSL)1910 3970
TRANSPORT WND (MPH) N 8 SE 8
VENT RATE (KT-FT) 13370 27790
CATEGORY DAY 2 3
INVERSION 68F/11AM 8PM 64F/9AM
DISPERSION 2 3
MAX ADI EARLY 8 POOR 4 VERY POOR 33 FAIR
MAX ADI LATE 22 FAIR 4 VERY POOR 52 GEN GOOD
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 6 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ075-202030-
FAYETTE-
INCLUDING THE CITY OF UNIONTOWN
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 90 30 40
CHANCE OF THUNDER (%) 20 0 20
TEMP (24H TREND) 75 (-4) 60 (-2) 79
RH % (24H TREND) 88 (+20) 100 (0) 73
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.80 0.01 0.03
PRECIP DURATION 8 0 1
PRECIP BEGIN 6 AM CONTINUING 1 PM
PRECIP END CONTINUING 9 PM CONTINUING
MIXING HGT(M-AGL/MSL) 640 1240
MIXING HGT(FT-AGL/MSL)2080 4070
TRANSPORT WND (MPH) N 8 SE 6
VENT RATE (KT-FT) 14560 20350
CATEGORY DAY 2 2
INVERSION 69F/10AM 7PM 67F/9AM
DISPERSION 2 2
MAX ADI EARLY 10 POOR 4 VERY POOR 27 FAIR
MAX ADI LATE 18 GEN POOR 3 VERY POOR 37 FAIR
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 5 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ076-202030-
HIGHER ELEVATIONS OF FAYETTE-
INCLUDING THE CITIES OF CHAMPION AND OHIOPYLE
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 100 20 40
CHANCE OF THUNDER (%) 30 0 20
TEMP (24H TREND) 74 (-3) 58 (-2) 78
RH % (24H TREND) 83 (+15) 100 (0) 67
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.71 0.01 0.03
PRECIP DURATION 9 0 1
PRECIP BEGIN 6 AM CONTINUING 1 PM
PRECIP END CONTINUING 9 PM CONTINUING
MIXING HGT(M-AGL/MSL) 530 1140
MIXING HGT(FT-AGL/MSL)1750 3760
TRANSPORT WND (MPH) NW 12 SE 7
VENT RATE (KT-FT) 17500 22560
CATEGORY DAY 2 2
INVERSION 68F/11AM 8PM 64F/9AM
DISPERSION 2 2
MAX ADI EARLY 11 POOR 3 VERY POOR 33 FAIR
MAX ADI LATE 19 GEN POOR 4 VERY POOR 40 FAIR
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 5 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ077-202030-
INDIANA-
INCLUDING THE CITY OF INDIANA
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS NONE NONE
CHANCE PRECIP (%) 90 0 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 73 (-5) 57 (-3) 78
RH % (24H TREND) 86 (+14) 100 (0) 67
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.97 0.00 0.00
PRECIP DURATION 7
PRECIP BEGIN 6 AM
PRECIP END 6 PM
MIXING HGT(M-AGL/MSL) 800 1420
MIXING HGT(FT-AGL/MSL)2640 4660
TRANSPORT WND (MPH) N 7 SE 8
VENT RATE (KT-FT) 15840 32620
CATEGORY DAY 2 3
INVERSION 68F/11AM 7PM 63F/9AM
DISPERSION 2 3
MAX ADI EARLY 11 POOR 5 VERY POOR 33 FAIR
MAX ADI LATE 22 FAIR 4 VERY POOR 57 GEN GOOD
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 5 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ078-202030-
HIGHER ELEVATIONS OF INDIANA-
INCLUDING THE CITY OF ARMAGH
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLEAR
PRECIP TYPE TSTMS NONE NONE
CHANCE PRECIP (%) 90 0 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 73 (-4) 57 (-3) 77
RH % (24H TREND) 87 (+18) 100 (0) 68
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 1.05 0.00 0.00
PRECIP DURATION 8
PRECIP BEGIN 6 AM
PRECIP END 6 PM
MIXING HGT(M-AGL/MSL) 650 1280
MIXING HGT(FT-AGL/MSL)2120 4220
TRANSPORT WND (MPH) N 7 SE 8
VENT RATE (KT-FT) 12720 29540
CATEGORY DAY 1 3
INVERSION 68F/11AM 8PM 63F/9AM
DISPERSION 1 3
MAX ADI EARLY 10 POOR 5 VERY POOR 36 FAIR
MAX ADI LATE 20 GEN POOR 4 VERY POOR 56 GEN GOOD
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 6 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ001-202030-
HANCOCK-
INCLUDING THE CITY OF WEIRTON
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS NONE TSTMS
CHANCE PRECIP (%) 90 0 20
CHANCE OF THUNDER (%) 20 0 10
TEMP (24H TREND) 76 (-2) 60 (-2) 79
RH % (24H TREND) 78 (+13) 100 (0) 65
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.67 0.00 0.01
PRECIP DURATION 6 0
PRECIP BEGIN 6 AM 3 PM
PRECIP END 6 PM 6 PM
MIXING HGT(M-AGL/MSL) 960 1450
MIXING HGT(FT-AGL/MSL)3150 4770
TRANSPORT WND (MPH) N 9 SE 6
VENT RATE (KT-FT) 25200 23850
CATEGORY DAY 2 3
INVERSION 67F/9AM 8PM 65F/9AM
DISPERSION 2 3
MAX ADI EARLY 9 POOR 4 VERY POOR 25 FAIR
MAX ADI LATE 23 FAIR 4 VERY POOR 41 GEN GOOD
MAX LVORI EARLY 9 6 8
MAX LVORI LATE 5 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ002-202030-
BROOKE-
INCLUDING THE CITIES OF FOLLANSBEE AND WELLSBURG
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 90 20 30
CHANCE OF THUNDER (%) 20 0 20
TEMP (24H TREND) 76 (-2) 61 (-1) 80
RH % (24H TREND) 81 (+14) 100 (0) 68
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.69 0.00 0.02
PRECIP DURATION 7 0 1
PRECIP BEGIN 6 AM CONTINUING 2 PM
PRECIP END CONTINUING 8 PM 6 PM
MIXING HGT(M-AGL/MSL) 940 1330
MIXING HGT(FT-AGL/MSL)3100 4380
TRANSPORT WND (MPH) N 9 SE 6
VENT RATE (KT-FT) 24800 21900
CATEGORY DAY 2 2
INVERSION 67F/9AM 7PM 66F/9AM
DISPERSION 2 2
MAX ADI EARLY 9 POOR 4 VERY POOR 25 FAIR
MAX ADI LATE 25 FAIR 4 VERY POOR 34 FAIR
MAX LVORI EARLY 9 6 8
MAX LVORI LATE 5 9 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ003-202030-
OHIO-
INCLUDING THE CITY OF WHEELING
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 90 30 30
CHANCE OF THUNDER (%) 20 0 20
TEMP (24H TREND) 75 (-3) 61 (-1) 79
RH % (24H TREND) 85 (+18) 100 (0) 71
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.63 0.00 0.02
PRECIP DURATION 7 0 1
PRECIP BEGIN 6 AM CONTINUING 2 PM
PRECIP END CONTINUING 8 PM 6 PM
MIXING HGT(M-AGL/MSL) 860 1230
MIXING HGT(FT-AGL/MSL)2810 4030
TRANSPORT WND (MPH) N 9 SE 6
VENT RATE (KT-FT) 22480 20150
CATEGORY DAY 2 2
INVERSION 69F/10AM 7PM 66F/9AM
DISPERSION 2 2
MAX ADI EARLY 10 POOR 4 VERY POOR 24 FAIR
MAX ADI LATE 19 GEN POOR 4 VERY POOR 30 FAIR
MAX LVORI EARLY 9 8 8
MAX LVORI LATE 6 9 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ004-202030-
MARSHALL-
INCLUDING THE CITY OF MOUNDSVILLE
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 90 30 30
CHANCE OF THUNDER (%) 30 20 20
TEMP (24H TREND) 76 (-2) 62 (-1) 80
RH % (24H TREND) 89 (+18) 100 (0) 75
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.66 0.00 0.01
PRECIP DURATION 7 0 1
PRECIP BEGIN 6 AM CONTINUING 2 PM
PRECIP END CONTINUING 9 PM CONTINUING
MIXING HGT(M-AGL/MSL) 830 1180
MIXING HGT(FT-AGL/MSL)2740 3870
TRANSPORT WND (MPH) NW 8 E 5
VENT RATE (KT-FT) 19180 15480
CATEGORY DAY 2 2
INVERSION 69F/10AM 7PM 67F/9AM
DISPERSION 2 2
MAX ADI EARLY 9 POOR 3 VERY POOR 21 FAIR
MAX ADI LATE 17 GEN POOR 4 VERY POOR 27 FAIR
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 7 9 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ012-202030-
WETZEL-
INCLUDING THE CITY OF NEW MARTINSVILLE
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR MCLEAR
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 100 30 40
CHANCE OF THUNDER (%) 30 20 30
TEMP (24H TREND) 75 (-3) 62 (-1) 79
RH % (24H TREND) 93 (+19) 100 (0) 78
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.59 0.00 0.03
PRECIP DURATION 7 0 1
PRECIP BEGIN 6 AM CONTINUING 1 PM
PRECIP END CONTINUING 9 PM CONTINUING
MIXING HGT(M-AGL/MSL) 730 1190
MIXING HGT(FT-AGL/MSL)2400 3910
TRANSPORT WND (MPH) N 8 SE 5
VENT RATE (KT-FT) 16800 15640
CATEGORY DAY 2 2
INVERSION 69F/10AM 7PM 67F/9AM
DISPERSION 2 2
MAX ADI EARLY 9 POOR 3 VERY POOR 18 GEN POOR
MAX ADI LATE 21 FAIR 4 VERY POOR 24 FAIR
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 6 9 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ021-202030-
MARION-
INCLUDING THE CITY OF FAIRMONT
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 90 40 50
CHANCE OF THUNDER (%) 30 30 30
TEMP (24H TREND) 74 (-5) 62 (-1) 78
RH % (24H TREND) 94 (+23) 100 (0) 78
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.46 0.01 0.06
PRECIP DURATION 8 0 1
PRECIP BEGIN 6 AM CONTINUING 1 PM
PRECIP END CONTINUING 9 PM CONTINUING
MIXING HGT(M-AGL/MSL) 640 1100
MIXING HGT(FT-AGL/MSL)2100 3620
TRANSPORT WND (MPH) NW 12 S 5
VENT RATE (KT-FT) 21000 14480
CATEGORY DAY 2 2
INVERSION 69F/10AM 7PM 67F/9AM
DISPERSION 2 2
MAX ADI EARLY 15 GEN POOR 3 VERY POOR 20 GEN POOR
MAX ADI LATE 23 FAIR 3 VERY POOR 24 FAIR
MAX LVORI EARLY 9 10 8
MAX LVORI LATE 5 9 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ509-202030-
MONONGALIA-
INCLUDING THE CITY OF MORGANTOWN
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 90 30 40
CHANCE OF THUNDER (%) 30 30 30
TEMP (24H TREND) 74 (-5) 62 (0) 78
RH % (24H TREND) 91 (+20) 100 (0) 76
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.56 0.01 0.06
PRECIP DURATION 8 0 1
PRECIP BEGIN 6 AM CONTINUING 1 PM
PRECIP END CONTINUING 9 PM CONTINUING
MIXING HGT(M-AGL/MSL) 620 1140
MIXING HGT(FT-AGL/MSL)2040 3740
TRANSPORT WND (MPH) NW 10 SE 5
VENT RATE (KT-FT) 18360 14960
CATEGORY DAY 2 2
INVERSION 69F/10AM 8PM 67F/9AM
DISPERSION 2 2
MAX ADI EARLY 13 GEN POOR 3 VERY POOR 23 FAIR
MAX ADI LATE 20 GEN POOR 3 VERY POOR 29 FAIR
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 5 9 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ510-202030-
RIDGES OF EASTERN MONONGALIA AND NORTHWESTERN PRESTON-
INCLUDING THE CITY OF COOPERS ROCK
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 90 30 50
CHANCE OF THUNDER (%) 30 30 30
TEMP (24H TREND) 72 (-4) 60 (-1) 76
RH % (24H TREND) 91 (+18) 100 (0) 76
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.48 0.01 0.06
PRECIP DURATION 9 0 1
PRECIP BEGIN 6 AM CONTINUING 1 PM
PRECIP END CONTINUING 9 PM CONTINUING
MIXING HGT(M-AGL/MSL) 550 1060
MIXING HGT(FT-AGL/MSL)1820 3470
TRANSPORT WND (MPH) W 12 SE 5
VENT RATE (KT-FT) 18200 13880
CATEGORY DAY 2 2
INVERSION 67F/10AM 7PM 66F/9AM
DISPERSION 2 2
MAX ADI EARLY 14 GEN POOR 3 VERY POOR 30 FAIR
MAX ADI LATE 20 GEN POOR 4 VERY POOR 32 FAIR
MAX LVORI EARLY 9 10 8
MAX LVORI LATE 5 9 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ511-202030-
PRESTON-
INCLUDING THE CITIES OF KINGWOOD AND BRUCETON MILLS
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLEAR PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 90 30 50
CHANCE OF THUNDER (%) 30 30 30
TEMP (24H TREND) 75 (-3) 60 (-1) 77
RH % (24H TREND) 87 (+17) 100 (+1) 72
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.41 0.01 0.06
PRECIP DURATION 9 0 1
PRECIP BEGIN 6 AM CONTINUING 1 PM
PRECIP END CONTINUING 9 PM CONTINUING
MIXING HGT(M-AGL/MSL) 590 990
MIXING HGT(FT-AGL/MSL)1930 3260
TRANSPORT WND (MPH) W 10 SE 6
VENT RATE (KT-FT) 17370 16300
CATEGORY DAY 2 2
INVERSION 69F/10AM 7PM 66F/9AM
DISPERSION 2 2
MAX ADI EARLY 17 GEN POOR 3 VERY POOR 28 FAIR
MAX ADI LATE 24 FAIR 4 VERY POOR 33 FAIR
MAX LVORI EARLY 9 9 8
MAX LVORI LATE 5 9 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ512-202030-
EASTERN PRESTON-
INCLUDING THE CITIES OF TERRA ALTA, ROWLESBURG, AND HAZELTON
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 90 30 60
CHANCE OF THUNDER (%) 30 30 30
TEMP (24H TREND) 73 (-3) 59 (-2) 76
RH % (24H TREND) 89 (+15) 100 (+1) 75
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.38 0.01 0.07
PRECIP DURATION 9 0 2
PRECIP BEGIN 6 AM CONTINUING 1 PM
PRECIP END CONTINUING 9 PM CONTINUING
MIXING HGT(M-AGL/MSL) 610 950
MIXING HGT(FT-AGL/MSL)2000 3110
TRANSPORT WND (MPH) W 12 SE 7
VENT RATE (KT-FT) 20000 18660
CATEGORY DAY 2 2
INVERSION 65F/9AM 7PM 64F/9AM
DISPERSION 2 2
MAX ADI EARLY 22 FAIR 3 VERY POOR 24 FAIR
MAX ADI LATE 30 FAIR 5 VERY POOR 32 FAIR
MAX LVORI EARLY 8 10 8
MAX LVORI LATE 5 9 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ513-202030-
WESTERN TUCKER-
INCLUDING THE CITIES OF PARSONS, HENDRICKS, AND SAINT GEORGE
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 90 40 60
CHANCE OF THUNDER (%) 30 20 30
TEMP (24H TREND) 76 (-2) 62 (0) 78
RH % (24H TREND) 83 (+16) 100 (+5) 72
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.48 0.02 0.10
PRECIP DURATION 8 1 3
PRECIP BEGIN 6 AM CONTINUING 12 PM
PRECIP END CONTINUING 2 AM CONTINUING
MIXING HGT(M-AGL/MSL) 720 840
MIXING HGT(FT-AGL/MSL)2350 2770
TRANSPORT WND (MPH) W 14 S 6
VENT RATE (KT-FT) 28200 13850
CATEGORY DAY 3 2
INVERSION 66F/9AM 7PM 66F/9AM
DISPERSION 3 2
MAX ADI EARLY 27 FAIR 4 VERY POOR 19 GEN POOR
MAX ADI LATE 33 FAIR 3 VERY POOR 27 FAIR
MAX LVORI EARLY 6 10 8
MAX LVORI LATE 4 9 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ514-202030-
EASTERN TUCKER-
INCLUDING THE CITIES OF DAVIS, THOMAS, AND CANAAN VALLEY
107 AM EDT THU AUG 20 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY PCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 90 40 50
CHANCE OF THUNDER (%) 40 20 30
TEMP (24H TREND) 73 (-1) 56 (-2) 73
RH % (24H TREND) 88 (+21) 100 (+2) 81
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR LGT/VAR
PRECIP AMOUNT 0.41 0.03 0.05
PRECIP DURATION 8 1 1
PRECIP BEGIN 6 AM CONTINUING 7 AM
PRECIP END CONTINUING 2 AM CONTINUING
MIXING HGT(M-AGL/MSL) 730 790
MIXING HGT(FT-AGL/MSL)2410 2590
TRANSPORT WND (MPH) W 16 S 7
VENT RATE (KT-FT) 33740 15540
CATEGORY DAY 3 2
INVERSION 64F/9AM 7PM 63F/9AM
DISPERSION 3 2
MAX ADI EARLY 32 FAIR 5 VERY POOR 14 GEN POOR
MAX ADI LATE 44 GEN GOOD 4 VERY POOR 26 FAIR
MAX LVORI EARLY 7 9 8
MAX LVORI LATE 5 9 5
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
FORECAST FOR DAYS 3 THROUGH 7
SATURDAY
PARTLY CLOUDY. PATCHY FOG THROUGH THE NIGHT. A CHANCE
OF SHOWERS AND THUNDERSTORMS. LOWS IN THE LOWER 60S. HIGHS IN THE
UPPER 70S. LIGHT WINDS.
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 MID 50S. HIGHS IN THE MID
70S. WEST WINDS 5 TO 10 MPH.
TUESDAY
PARTLY CLOUDY. LOWS IN THE MID 50S. HIGHS IN THE UPPER
70S. SOUTHWEST WINDS 5 TO 10 MPH.
WEDNESDAY
MOSTLY CLOUDY. LOWS IN THE UPPER 50S. HIGHS IN THE
UPPER 70S. SOUTHWEST WINDS AROUND 5 MPH.
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