851
FNUS51 KPBZ 210600
FWFPBZ
FIRE WEATHER PLANNING FORECAST
NATIONAL WEATHER SERVICE PITTSBURGH PA
200 AM EDT THU MAY 21 2026
DISCUSSION
RAIN, SOUTH OF INTERSTATE 80, WILL TAPER OFF FROM NORTH TO SOUTH
TODAY. RAIN CHANCES INCREASE AGAIN FRIDAY, WITH WIDESPREAD RAIN
FRIDAY NIGHT AND SATURDAY AS A WARM FRONT LIFTS NORTH ACROSS THE
AREA. PERIODIC SHOWER AND THUNDERSTORM CHANCES ARE THEN EXPECTED
INTO EARLY NEXT WEEK.
OHZ039-212030-
TUSCARAWAS-
INCLUDING THE CITIES OF NEW PHILADELPHIA AND DOVER
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE RAIN
CHANCE PRECIP (%) 0 0 60
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 68 (+1) 52 (+1) 69
RH % (24H TREND) 47 (-43) 84 (-12) 65
WIND 20FT/EARLY(MPH) NE 8 NE 6 E 8
WIND 20FT/LATE(MPH) NE 8 E 6 E 9 G17
PRECIP AMOUNT 0.00 0.00 0.06
PRECIP DURATION 3
PRECIP BEGIN 10 AM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1100 770
MIXING HGT(FT-AGL/MSL)3600 2530
TRANSPORT WND (MPH) E 14 SE 18
VENT RATE (KT-FT) 43200 40480
CATEGORY DAY 3 3
INVERSION 49F/8AM 8PM 55F/7AM
DISPERSION 3 3
MAX ADI EARLY 42 GEN GOOD 20 GEN POOR 38 FAIR
MAX ADI LATE 54 GEN GOOD 11 POOR 49 GEN GOOD
MAX LVORI EARLY 4 3 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ040-212030-
CARROLL-
INCLUDING THE CITIES OF CARROLLTON AND MALVERN
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE RAIN
CHANCE PRECIP (%) 0 0 50
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 68 (+2) 51 (0) 68
RH % (24H TREND) 47 (-43) 82 (-15) 64
WIND 20FT/EARLY(MPH) NE 8 E 7 E 9 G17
WIND 20FT/LATE(MPH) NE 8 E 8 E 11 G18
PRECIP AMOUNT 0.00 0.00 0.04
PRECIP DURATION 1
PRECIP BEGIN 11 AM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1100 790
MIXING HGT(FT-AGL/MSL)3600 2580
TRANSPORT WND (MPH) E 14 SE 20
VENT RATE (KT-FT) 43200 43860
CATEGORY DAY 3 3
INVERSION 49F/8AM 8PM 54F/6AM
DISPERSION 3 3
MAX ADI EARLY 41 GEN GOOD 20 GEN POOR 36 FAIR
MAX ADI LATE 50 GEN GOOD 12 POOR 43 GEN GOOD
MAX LVORI EARLY 4 3 3
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ041-212030-
COLUMBIANA-
INCLUDING THE CITIES OF EAST LIVERPOOL, SALEM, AND COLUMBIANA
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE RAIN
CHANCE PRECIP (%) 0 0 50
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 68 (+1) 50 (-1) 68
RH % (24H TREND) 46 (-41) 79 (-14) 61
WIND 20FT/EARLY(MPH) NE 7 E 6 E 9 G17
WIND 20FT/LATE(MPH) NE 8 E 7 E 11 G18
PRECIP AMOUNT 0.00 0.00 0.02
PRECIP DURATION 1
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1130 830
MIXING HGT(FT-AGL/MSL)3710 2730
TRANSPORT WND (MPH) E 14 SE 21
VENT RATE (KT-FT) 44520 49140
CATEGORY DAY 3 3
INVERSION 49F/8AM 8PM 54F/7AM
DISPERSION 3 3
MAX ADI EARLY 41 GEN GOOD 19 GEN POOR 42 GEN GOOD
MAX ADI LATE 61 GOOD 12 POOR 46 GEN GOOD
MAX LVORI EARLY 4 3 3
MAX LVORI LATE 1 4 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ048-212030-
COSHOCTON-
INCLUDING THE CITY OF COSHOCTON
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE RAIN
CHANCE PRECIP (%) 0 0 70
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 68 (+2) 51 (+1) 70
RH % (24H TREND) 46 (-47) 86 (-13) 67
WIND 20FT/EARLY(MPH) NE 7 NE 6 E 5
WIND 20FT/LATE(MPH) NE 8 LGT/VAR E 7
PRECIP AMOUNT 0.00 0.00 0.07
PRECIP DURATION 3
PRECIP BEGIN 9 AM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1100 750
MIXING HGT(FT-AGL/MSL)3600 2460
TRANSPORT WND (MPH) E 15 E 17
VENT RATE (KT-FT) 46800 36900
CATEGORY DAY 3 3
INVERSION 49F/8AM 8PM 58F/8AM
DISPERSION 3 3
MAX ADI EARLY 42 GEN GOOD 16 GEN POOR 35 FAIR
MAX ADI LATE 58 GEN GOOD 8 POOR 47 GEN GOOD
MAX LVORI EARLY 4 3 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ049-212030-
HARRISON-
INCLUDING THE CITY OF CADIZ
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE RAIN
CHANCE PRECIP (%) 0 0 60
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 68 (-3) 51 (+1) 69
RH % (24H TREND) 48 (-38) 87 (-9) 64
WIND 20FT/EARLY(MPH) NE 7 E 7 E 9 G17
WIND 20FT/LATE(MPH) NE 8 E 7 E 10 G18
PRECIP AMOUNT 0.00 0.00 0.05
PRECIP DURATION 3
PRECIP BEGIN 10 AM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1060 690
MIXING HGT(FT-AGL/MSL)3480 2270
TRANSPORT WND (MPH) E 14 SE 20
VENT RATE (KT-FT) 41760 38590
CATEGORY DAY 3 3
INVERSION 49F/8AM 8PM 54F/4AM
DISPERSION 3 3
MAX ADI EARLY 38 FAIR 20 GEN POOR 38 FAIR
MAX ADI LATE 48 GEN GOOD 12 POOR 44 GEN GOOD
MAX LVORI EARLY 4 3 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ050-212030-
JEFFERSON OH-
INCLUDING THE CITY OF STEUBENVILLE
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE RAIN
CHANCE PRECIP (%) 0 0 60
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 67 (-3) 52 (+1) 68
RH % (24H TREND) 48 (-37) 84 (-13) 62
WIND 20FT/EARLY(MPH) NE 7 E 7 E 8
WIND 20FT/LATE(MPH) NE 8 E 8 E 10 G18
PRECIP AMOUNT 0.00 0.00 0.04
PRECIP DURATION 3
PRECIP BEGIN 10 AM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1050 790
MIXING HGT(FT-AGL/MSL)3450 2590
TRANSPORT WND (MPH) E 14 SE 20
VENT RATE (KT-FT) 41400 44030
CATEGORY DAY 3 3
INVERSION 50F/8AM 8PM 54F/4AM
DISPERSION 3 3
MAX ADI EARLY 36 FAIR 20 GEN POOR 46 GEN GOOD
MAX ADI LATE 46 GEN GOOD 12 POOR 42 GEN GOOD
MAX LVORI EARLY 4 3 3
MAX LVORI LATE 1 4 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ057-212030-
MUSKINGUM-
INCLUDING THE CITY OF ZANESVILLE
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE TSTMS
CHANCE PRECIP (%) 0 0 70
CHANCE OF THUNDER (%) 0 0 10
TEMP (24H TREND) 69 (-3) 52 (+1) 71
RH % (24H TREND) 46 (-40) 89 (-6) 69
WIND 20FT/EARLY(MPH) NE 6 NE 5 E 5
WIND 20FT/LATE(MPH) NE 6 LGT/VAR E 7
PRECIP AMOUNT 0.00 0.00 0.09
PRECIP DURATION 4
PRECIP BEGIN 8 AM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1100 720
MIXING HGT(FT-AGL/MSL)3600 2360
TRANSPORT WND (MPH) NE 14 E 16
VENT RATE (KT-FT) 43200 33040
CATEGORY DAY 3 3
INVERSION 49F/8AM 8PM 59F/8AM
DISPERSION 3 3
MAX ADI EARLY 36 FAIR 19 GEN POOR 32 FAIR
MAX ADI LATE 48 GEN GOOD 8 POOR 46 GEN GOOD
MAX LVORI EARLY 4 3 4
MAX LVORI LATE 1 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ058-212030-
GUERNSEY-
INCLUDING THE CITY OF CAMBRIDGE
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE RAIN
CHANCE PRECIP (%) 0 0 70
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 69 (-4) 52 (+1) 71
RH % (24H TREND) 49 (-36) 90 (-4) 67
WIND 20FT/EARLY(MPH) NE 6 NE 6 E 6
WIND 20FT/LATE(MPH) NE 6 E 5 E 8 G17
PRECIP AMOUNT 0.00 0.00 0.08
PRECIP DURATION 4
PRECIP BEGIN 8 AM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1080 670
MIXING HGT(FT-AGL/MSL)3560 2210
TRANSPORT WND (MPH) E 13 E 18
VENT RATE (KT-FT) 39160 35360
CATEGORY DAY 3 3
INVERSION 50F/8AM 8PM 56F/6AM
DISPERSION 3 3
MAX ADI EARLY 35 FAIR 19 GEN POOR 33 FAIR
MAX ADI LATE 47 GEN GOOD 9 POOR 49 GEN GOOD
MAX LVORI EARLY 4 3 4
MAX LVORI LATE 1 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ059-212030-
BELMONT-
INCLUDING THE CITIES OF MARTINS FERRY AND ST. CLAIRSVILLE
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE RAIN NONE RAIN
CHANCE PRECIP (%) 30 0 70
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 67 (-7) 52 (+1) 70
RH % (24H TREND) 57 (-26) 92 (-2) 66
WIND 20FT/EARLY(MPH) NE 8 G17 NE 7 E 8
WIND 20FT/LATE(MPH) NE 8 E 7 E 9 G17
PRECIP AMOUNT 0.02 0.00 0.07
PRECIP DURATION 0 4
PRECIP BEGIN 6 AM 8 AM
PRECIP END 9 AM CONTINUING
MIXING HGT(M-AGL/MSL) 920 670
MIXING HGT(FT-AGL/MSL)3000 2210
TRANSPORT WND (MPH) E 15 E 20
VENT RATE (KT-FT) 39000 37570
CATEGORY DAY 3 3
INVERSION 50F/8AM 8PM 56F/5AM
DISPERSION 3 3
MAX ADI EARLY 33 FAIR 22 FAIR 37 FAIR
MAX ADI LATE 47 GEN GOOD 12 POOR 46 GEN GOOD
MAX LVORI EARLY 5 4 4
MAX LVORI LATE 3 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ068-212030-
NOBLE-
INCLUDING THE CITY OF CALDWELL
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE RAIN NONE TSTMS
CHANCE PRECIP (%) 30 0 70
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 68 (-5) 52 (+1) 71
RH % (24H TREND) 56 (-26) 93 (-3) 71
WIND 20FT/EARLY(MPH) NE 7 NE 6 E 5
WIND 20FT/LATE(MPH) NE 6 LGT/VAR E 7
PRECIP AMOUNT 0.04 0.00 0.09
PRECIP DURATION 1 4
PRECIP BEGIN 6 AM 7 AM
PRECIP END 12 PM CONTINUING
MIXING HGT(M-AGL/MSL) 880 650
MIXING HGT(FT-AGL/MSL)2900 2150
TRANSPORT WND (MPH) E 14 E 17
VENT RATE (KT-FT) 34800 32250
CATEGORY DAY 3 3
INVERSION 50F/8AM 8PM 65F/10AM
DISPERSION 3 3
MAX ADI EARLY 28 FAIR 11 POOR 28 FAIR
MAX ADI LATE 46 GEN GOOD 8 POOR 43 GEN GOOD
MAX LVORI EARLY 5 4 5
MAX LVORI LATE 3 6 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ069-212030-
MONROE-
INCLUDING THE CITY OF WOODSFIELD
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE RAIN NONE TSTMS
CHANCE PRECIP (%) 60 0 70
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 67 (-8) 54 (+2) 70
RH % (24H TREND) 63 (-16) 92 (-7) 70
WIND 20FT/EARLY(MPH) NE 7 G17 NE 6 E 5
WIND 20FT/LATE(MPH) NE 6 E 5 E 6
PRECIP AMOUNT 0.06 0.00 0.09
PRECIP DURATION 2 4
PRECIP BEGIN 6 AM 7 AM
PRECIP END 1 PM CONTINUING
MIXING HGT(M-AGL/MSL) 800 660
MIXING HGT(FT-AGL/MSL)2620 2170
TRANSPORT WND (MPH) NE 14 E 17
VENT RATE (KT-FT) 31440 32550
CATEGORY DAY 3 3
INVERSION 51F/6AM 9PM 56F/4AM
DISPERSION 3 3
MAX ADI EARLY 28 FAIR 22 FAIR 31 FAIR
MAX ADI LATE 42 GEN GOOD 8 POOR 44 GEN GOOD
MAX LVORI EARLY 5 4 5
MAX LVORI LATE 3 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ007-212030-
MERCER-
INCLUDING THE CITIES OF SHARON, HERMITAGE, AND GROVE CITY
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY
PRECIP TYPE NONE NONE RAIN
CHANCE PRECIP (%) 0 0 20
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 68 (+3) 47 (-2) 68
RH % (24H TREND) 43 (-36) 73 (-19) 57
WIND 20FT/EARLY(MPH) NE 6 NE 5 E 10 G17
WIND 20FT/LATE(MPH) NE 7 E 7 E 11 G19
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION 0
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1300 890
MIXING HGT(FT-AGL/MSL)4270 2920
TRANSPORT WND (MPH) E 12 SE 21
VENT RATE (KT-FT) 42700 52560
CATEGORY DAY 3 4
INVERSION 49F/8AM 8PM 54F/8AM
DISPERSION 3 4
MAX ADI EARLY 41 GEN GOOD 9 POOR 39 FAIR
MAX ADI LATE 63 GOOD 13 GEN POOR 47 GEN GOOD
MAX LVORI EARLY 4 3 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ008-212030-
VENANGO-
INCLUDING THE CITIES OF OIL CITY AND FRANKLIN
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE RAIN
CHANCE PRECIP (%) 0 0 20
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 68 (+3) 46 (-4) 67
RH % (24H TREND) 40 (-40) 71 (-22) 54
WIND 20FT/EARLY(MPH) NE 5 LGT/VAR E 8
WIND 20FT/LATE(MPH) NE 5 E 6 SE 9 G18
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION 0
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1350 990
MIXING HGT(FT-AGL/MSL)4430 3230
TRANSPORT WND (MPH) E 12 SE 20
VENT RATE (KT-FT) 44300 54910
CATEGORY DAY 3 4
INVERSION 48F/8AM 8PM 49F/7AM
DISPERSION 3 4
MAX ADI EARLY 43 GEN GOOD 8 POOR 52 GEN GOOD
MAX ADI LATE 62 GOOD 12 POOR 64 GOOD
MAX LVORI EARLY 3 3 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ009-212030-
FOREST-
INCLUDING THE CITY OF TIONESTA
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 67 (+2) 44 (-5) 66
RH % (24H TREND) 37 (-39) 67 (-24) 51
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR E 6
WIND 20FT/LATE(MPH) NE 5 LGT/VAR SE 7 G17
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1360 1010
MIXING HGT(FT-AGL/MSL)4450 3300
TRANSPORT WND (MPH) E 12 SE 18
VENT RATE (KT-FT) 44500 52800
CATEGORY DAY 3 4
INVERSION 47F/7AM 8PM 51F/8AM
DISPERSION 3 4
MAX ADI EARLY 47 GEN GOOD 8 POOR 52 GEN GOOD
MAX ADI LATE 64 GOOD 8 POOR 62 GOOD
MAX LVORI EARLY 3 3 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ013-212030-
LAWRENCE-
INCLUDING THE CITIES OF NEW CASTLE AND ELLWOOD CITY
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY PCLDY
PRECIP TYPE NONE NONE RAIN
CHANCE PRECIP (%) 0 0 30
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 69 (+2) 49 (-2) 69
RH % (24H TREND) 44 (-39) 76 (-19) 57
WIND 20FT/EARLY(MPH) NE 5 LGT/VAR E 9
WIND 20FT/LATE(MPH) NE 6 E 6 E 11 G18
PRECIP AMOUNT 0.00 0.00 0.01
PRECIP DURATION 1
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1240 890
MIXING HGT(FT-AGL/MSL)4070 2920
TRANSPORT WND (MPH) E 13 SE 21
VENT RATE (KT-FT) 44770 52560
CATEGORY DAY 3 4
INVERSION 49F/7AM 8PM 53F/7AM
DISPERSION 3 4
MAX ADI EARLY 38 FAIR 8 POOR 47 GEN GOOD
MAX ADI LATE 59 GEN GOOD 13 GEN POOR 49 GEN GOOD
MAX LVORI EARLY 4 3 3
MAX LVORI LATE 1 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ014-212030-
BUTLER-
INCLUDING THE CITY OF BUTLER
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE RAIN
CHANCE PRECIP (%) 0 0 30
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 67 (-2) 47 (-3) 67
RH % (24H TREND) 47 (-38) 80 (-14) 62
WIND 20FT/EARLY(MPH) NE 5 E 5 E 9 G17
WIND 20FT/LATE(MPH) E 6 E 7 E 11 G19
PRECIP AMOUNT 0.00 0.00 0.01
PRECIP DURATION 1
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1200 910
MIXING HGT(FT-AGL/MSL)3940 2980
TRANSPORT WND (MPH) E 13 SE 21
VENT RATE (KT-FT) 43340 53640
CATEGORY DAY 3 4
INVERSION 49F/7AM 8PM 50F/4AM
DISPERSION 3 4
MAX ADI EARLY 39 FAIR 8 POOR 42 GEN GOOD
MAX ADI LATE 57 GEN GOOD 13 GEN POOR 49 GEN GOOD
MAX LVORI EARLY 4 3 3
MAX LVORI LATE 1 4 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ015-212030-
CLARION-
INCLUDING THE CITY OF CLARION
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE RAIN
CHANCE PRECIP (%) 0 0 20
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 67 (-1) 47 (-3) 65
RH % (24H TREND) 41 (-42) 71 (-19) 55
WIND 20FT/EARLY(MPH) NE 5 LGT/VAR E 8 G17
WIND 20FT/LATE(MPH) E 5 E 6 SE 9 G19
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION 0
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1330 970
MIXING HGT(FT-AGL/MSL)4370 3190
TRANSPORT WND (MPH) E 12 SE 20
VENT RATE (KT-FT) 43700 54230
CATEGORY DAY 3 4
INVERSION 49F/7AM 8PM 49F/5AM
DISPERSION 3 4
MAX ADI EARLY 42 GEN GOOD 8 POOR 55 GEN GOOD
MAX ADI LATE 59 GEN GOOD 11 POOR 59 GEN GOOD
MAX LVORI EARLY 4 3 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ016-212030-
JEFFERSON PA-
INCLUDING THE CITIES OF PUNXSUTAWNEY AND BROOKVILLE
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE RAIN
CHANCE PRECIP (%) 0 0 20
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 65 (-5) 45 (-6) 64
RH % (24H TREND) 40 (-39) 70 (-19) 54
WIND 20FT/EARLY(MPH) NE 5 E 5 E 8 G18
WIND 20FT/LATE(MPH) E 6 E 6 SE 10 G19
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION 0
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1260 990
MIXING HGT(FT-AGL/MSL)4150 3250
TRANSPORT WND (MPH) E 12 SE 20
VENT RATE (KT-FT) 41500 55250
CATEGORY DAY 3 4
INVERSION 49F/7AM 8PM 48F/5AM
DISPERSION 3 4
MAX ADI EARLY 42 GEN GOOD 8 POOR 55 GEN GOOD
MAX ADI LATE 55 GEN GOOD 13 GEN POOR 48 GEN GOOD
MAX LVORI EARLY 4 3 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ020-212030-
BEAVER-
INCLUDING THE CITIES OF ALIQUIPPA, BEAVER FALLS, AMBRIDGE,
AND MONACA
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE RAIN
CHANCE PRECIP (%) 0 0 50
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 68 (-2) 52 (0) 68
RH % (24H TREND) 48 (-37) 77 (-18) 62
WIND 20FT/EARLY(MPH) NE 5 E 5 E 8
WIND 20FT/LATE(MPH) NE 6 E 6 E 10 G18
PRECIP AMOUNT 0.00 0.00 0.01
PRECIP DURATION 1
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1140 910
MIXING HGT(FT-AGL/MSL)3730 2970
TRANSPORT WND (MPH) E 14 SE 21
VENT RATE (KT-FT) 44760 53460
CATEGORY DAY 3 4
INVERSION 51F/8AM 8PM 54F/4AM
DISPERSION 3 4
MAX ADI EARLY 38 FAIR 17 GEN POOR 53 GEN GOOD
MAX ADI LATE 55 GEN GOOD 12 POOR 49 GEN GOOD
MAX LVORI EARLY 4 3 3
MAX LVORI LATE 1 4 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ021-212030-
ALLEGHENY-
INCLUDING THE CITY OF PITTSBURGH METRO AREA
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE RAIN NONE RAIN
CHANCE PRECIP (%) 30 0 50
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 65 (-8) 52 (-1) 67
RH % (24H TREND) 57 (-25) 84 (-11) 64
WIND 20FT/EARLY(MPH) NE 7 E 7 E 9 G17
WIND 20FT/LATE(MPH) NE 8 E 7 E 12 G20
PRECIP AMOUNT 0.01 0.00 0.02
PRECIP DURATION 1 1
PRECIP BEGIN 6 AM 2 PM
PRECIP END 11 AM CONTINUING
MIXING HGT(M-AGL/MSL) 990 880
MIXING HGT(FT-AGL/MSL)3240 2900
TRANSPORT WND (MPH) E 14 SE 21
VENT RATE (KT-FT) 38880 52200
CATEGORY DAY 3 3
INVERSION 51F/7AM 9PM 54F/4AM
DISPERSION 3 3
MAX ADI EARLY 36 FAIR 19 GEN POOR 40 FAIR
MAX ADI LATE 43 GEN GOOD 12 POOR 49 GEN GOOD
MAX LVORI EARLY 4 3 3
MAX LVORI LATE 3 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ022-212030-
ARMSTRONG-
INCLUDING THE CITIES OF KITTANNING AND FORD CITY
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE RAIN
CHANCE PRECIP (%) 0 0 30
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 67 (-4) 49 (-3) 66
RH % (24H TREND) 51 (-33) 81 (-14) 61
WIND 20FT/EARLY(MPH) NE 5 E 5 E 9 G17
WIND 20FT/LATE(MPH) E 6 E 6 E 10 G19
PRECIP AMOUNT 0.00 0.00 0.01
PRECIP DURATION 1
PRECIP BEGIN 2 PM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1160 960
MIXING HGT(FT-AGL/MSL)3790 3160
TRANSPORT WND (MPH) E 12 SE 21
VENT RATE (KT-FT) 37900 56880
CATEGORY DAY 3 4
INVERSION 50F/7AM 8PM 51F/4AM
DISPERSION 3 4
MAX ADI EARLY 38 FAIR 8 POOR 47 GEN GOOD
MAX ADI LATE 47 GEN GOOD 12 POOR 50 GEN GOOD
MAX LVORI EARLY 5 3 3
MAX LVORI LATE 2 4 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ029-212030-
WASHINGTON-
INCLUDING THE CITIES OF WASHINGTON AND CANONSBURG
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE RAIN NONE RAIN
CHANCE PRECIP (%) 50 0 60
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 64 (-9) 52 (0) 67
RH % (24H TREND) 61 (-20) 89 (-7) 66
WIND 20FT/EARLY(MPH) NE 7 E 8 E 9 G17
WIND 20FT/LATE(MPH) NE 9 E 7 E 10 G19
PRECIP AMOUNT 0.06 0.00 0.03
PRECIP DURATION 2 3
PRECIP BEGIN 6 AM 10 AM
PRECIP END 2 PM CONTINUING
MIXING HGT(M-AGL/MSL) 830 730
MIXING HGT(FT-AGL/MSL)2720 2410
TRANSPORT WND (MPH) E 15 SE 21
VENT RATE (KT-FT) 35360 43380
CATEGORY DAY 3 3
INVERSION 51F/6AM 9PM 54F/4AM
DISPERSION 3 3
MAX ADI EARLY 30 FAIR 21 FAIR 40 FAIR
MAX ADI LATE 43 GEN GOOD 12 POOR 43 GEN GOOD
MAX LVORI EARLY 5 3 4
MAX LVORI LATE 3 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ031-212030-
GREENE-
INCLUDING THE CITY OF WAYNESBURG
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE RAIN NONE RAIN
CHANCE PRECIP (%) 90 0 70
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 63 (-13) 53 (0) 67
RH % (24H TREND) 73 (-3) 91 (-9) 72
WIND 20FT/EARLY(MPH) NE 7 NE 6 E 6
WIND 20FT/LATE(MPH) NE 7 LGT/VAR E 8 G17
PRECIP AMOUNT 0.23 0.00 0.04
PRECIP DURATION 4 4
PRECIP BEGIN 6 AM 10 AM
PRECIP END 2 PM CONTINUING
MIXING HGT(M-AGL/MSL) 660 650
MIXING HGT(FT-AGL/MSL)2180 2130
TRANSPORT WND (MPH) E 14 SE 18
VENT RATE (KT-FT) 26160 34080
CATEGORY DAY 2 3
INVERSION 52F/6AM 9PM 59F/8AM
DISPERSION 2 3
MAX ADI EARLY 23 FAIR 16 GEN POOR 45 GEN GOOD
MAX ADI LATE 37 FAIR 8 POOR 45 GEN GOOD
MAX LVORI EARLY 5 4 5
MAX LVORI LATE 4 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ073-212030-
WESTMORELAND-
INCLUDING THE CITIES OF MURRYSVILLE, GREENSBURG, NEW KENSINGTON,
LOWER BURRELL, LATROBE, AND MONESSEN
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE RAIN NONE RAIN
CHANCE PRECIP (%) 70 0 40
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 64 (-10) 51 (-2) 66
RH % (24H TREND) 62 (-19) 91 (-7) 65
WIND 20FT/EARLY(MPH) NE 7 E 6 E 10 G19
WIND 20FT/LATE(MPH) NE 8 E 6 E 12 G21
PRECIP AMOUNT 0.09 0.00 0.01
PRECIP DURATION 3 1
PRECIP BEGIN 6 AM 1 PM
PRECIP END 2 PM CONTINUING
MIXING HGT(M-AGL/MSL) 810 850
MIXING HGT(FT-AGL/MSL)2670 2800
TRANSPORT WND (MPH) E 14 SE 21
VENT RATE (KT-FT) 32040 50400
CATEGORY DAY 3 3
INVERSION 52F/6AM 8PM 53F/4AM
DISPERSION 3 3
MAX ADI EARLY 28 FAIR 19 GEN POOR 41 GEN GOOD
MAX ADI LATE 38 FAIR 11 POOR 47 GEN GOOD
MAX LVORI EARLY 5 4 4
MAX LVORI LATE 3 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ074-212030-
HIGHER ELEVATIONS OF WESTMORELAND-
INCLUDING THE CITIES OF LIGONIER AND DONEGAL
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE RAIN NONE RAIN
CHANCE PRECIP (%) 90 0 50
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 63 (-10) 50 (-3) 65
RH % (24H TREND) 60 (-17) 89 (-10) 61
WIND 20FT/EARLY(MPH) LGT/VAR E 5 SE 10 G22
WIND 20FT/LATE(MPH) E 5 E 6 G19 SE 12 G23
PRECIP AMOUNT 0.19 0.00 0.01
PRECIP DURATION 3 1
PRECIP BEGIN 6 AM 1 PM
PRECIP END 2 PM CONTINUING
MIXING HGT(M-AGL/MSL) 630 720
MIXING HGT(FT-AGL/MSL)2080 2370
TRANSPORT WND (MPH) E 14 SE 24
VENT RATE (KT-FT) 24960 49770
CATEGORY DAY 2 3
INVERSION 54F/6AM 10PM 52F/4AM
DISPERSION 2 3
MAX ADI EARLY 21 FAIR 9 POOR 43 GEN GOOD
MAX ADI LATE 32 FAIR 13 GEN POOR 48 GEN GOOD
MAX LVORI EARLY 5 4 3
MAX LVORI LATE 4 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ075-212030-
FAYETTE-
INCLUDING THE CITY OF UNIONTOWN
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE RAIN NONE RAIN
CHANCE PRECIP (%) 90 0 50
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 64 (-13) 52 (-2) 66
RH % (24H TREND) 71 (-2) 93 (-5) 68
WIND 20FT/EARLY(MPH) NE 5 E 5 E 8 G19
WIND 20FT/LATE(MPH) NE 6 E 5 SE 10 G21
PRECIP AMOUNT 0.31 0.00 0.01
PRECIP DURATION 4 4
PRECIP BEGIN 6 AM 10 AM
PRECIP END 3 PM CONTINUING
MIXING HGT(M-AGL/MSL) 680 680
MIXING HGT(FT-AGL/MSL)2230 2230
TRANSPORT WND (MPH) E 12 SE 20
VENT RATE (KT-FT) 22300 37910
CATEGORY DAY 2 3
INVERSION 54F/6AM 8PM 55F/5AM
DISPERSION 2 3
MAX ADI EARLY 19 GEN POOR 8 POOR 42 GEN GOOD
MAX ADI LATE 31 FAIR 9 POOR 41 GEN GOOD
MAX LVORI EARLY 5 4 4
MAX LVORI LATE 4 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ076-212030-
HIGHER ELEVATIONS OF FAYETTE-
INCLUDING THE CITIES OF CHAMPION AND OHIOPYLE
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE RAIN NONE RAIN
CHANCE PRECIP (%) 90 0 50
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 61 (-14) 50 (-3) 63
RH % (24H TREND) 69 (-9) 95 (-4) 66
WIND 20FT/EARLY(MPH) LGT/VAR E 5 SE 9 G21
WIND 20FT/LATE(MPH) LGT/VAR SE 6 G18 SE 10 G22
PRECIP AMOUNT 0.41 0.00 0.01
PRECIP DURATION 6 1
PRECIP BEGIN 6 AM 10 AM
PRECIP END 4 PM CONTINUING
MIXING HGT(M-AGL/MSL) 540 600
MIXING HGT(FT-AGL/MSL)1770 1950
TRANSPORT WND (MPH) E 13 SE 23
VENT RATE (KT-FT) 19470 39000
CATEGORY DAY 2 3
INVERSION 53F/8AM 9PM 52F/4AM
DISPERSION 2 3
MAX ADI EARLY 17 GEN POOR 10 POOR 43 GEN GOOD
MAX ADI LATE 27 FAIR 14 GEN POOR 48 GEN GOOD
MAX LVORI EARLY 6 4 4
MAX LVORI LATE 5 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ077-212030-
INDIANA-
INCLUDING THE CITY OF INDIANA
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE RAIN NONE RAIN
CHANCE PRECIP (%) 30 0 40
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 64 (-7) 48 (-5) 65
RH % (24H TREND) 53 (-29) 82 (-12) 60
WIND 20FT/EARLY(MPH) NE 5 E 5 E 9 G19
WIND 20FT/LATE(MPH) E 7 E 6 E 11 G20
PRECIP AMOUNT 0.01 0.00 0.01
PRECIP DURATION 1 1
PRECIP BEGIN 6 AM 2 PM
PRECIP END 11 AM CONTINUING
MIXING HGT(M-AGL/MSL) 1020 930
MIXING HGT(FT-AGL/MSL)3340 3040
TRANSPORT WND (MPH) E 13 SE 21
VENT RATE (KT-FT) 36740 54720
CATEGORY DAY 3 4
INVERSION 51F/7AM 8PM 51F/4AM
DISPERSION 3 4
MAX ADI EARLY 34 FAIR 16 GEN POOR 45 GEN GOOD
MAX ADI LATE 40 FAIR 13 GEN POOR 49 GEN GOOD
MAX LVORI EARLY 5 3 3
MAX LVORI LATE 3 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ078-212030-
HIGHER ELEVATIONS OF INDIANA-
INCLUDING THE CITY OF ARMAGH
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE RAIN NONE RAIN
CHANCE PRECIP (%) 60 0 40
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 63 (-8) 49 (-4) 64
RH % (24H TREND) 58 (-21) 83 (-14) 61
WIND 20FT/EARLY(MPH) NE 5 E 5 E 10 G20
WIND 20FT/LATE(MPH) E 6 E 6 G17 SE 11 G21
PRECIP AMOUNT 0.07 0.00 0.01
PRECIP DURATION 2 1
PRECIP BEGIN 6 AM 2 PM
PRECIP END 11 AM CONTINUING
MIXING HGT(M-AGL/MSL) 790 820
MIXING HGT(FT-AGL/MSL)2590 2690
TRANSPORT WND (MPH) E 13 SE 22
VENT RATE (KT-FT) 28490 51110
CATEGORY DAY 3 4
INVERSION 53F/6AM 10PM 51F/4AM
DISPERSION 3 4
MAX ADI EARLY 29 FAIR 9 POOR 44 GEN GOOD
MAX ADI LATE 37 FAIR 13 GEN POOR 49 GEN GOOD
MAX LVORI EARLY 5 3 3
MAX LVORI LATE 3 4 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ001-212030-
HANCOCK-
INCLUDING THE CITY OF WEIRTON
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE NONE NONE RAIN
CHANCE PRECIP (%) 0 0 50
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 67 (-2) 52 (+1) 68
RH % (24H TREND) 49 (-36) 79 (-16) 62
WIND 20FT/EARLY(MPH) NE 6 E 6 E 8
WIND 20FT/LATE(MPH) NE 7 E 7 E 10 G18
PRECIP AMOUNT 0.00 0.00 0.02
PRECIP DURATION 1
PRECIP BEGIN 11 AM
PRECIP END CONTINUING
MIXING HGT(M-AGL/MSL) 1060 830
MIXING HGT(FT-AGL/MSL)3480 2740
TRANSPORT WND (MPH) E 13 SE 21
VENT RATE (KT-FT) 38280 49320
CATEGORY DAY 3 3
INVERSION 50F/8AM 9PM 54F/4AM
DISPERSION 3 3
MAX ADI EARLY 37 FAIR 20 GEN POOR 49 GEN GOOD
MAX ADI LATE 48 GEN GOOD 13 GEN POOR 51 GEN GOOD
MAX LVORI EARLY 4 3 3
MAX LVORI LATE 1 4 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ002-212030-
BROOKE-
INCLUDING THE CITIES OF FOLLANSBEE AND WELLSBURG
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE RAIN NONE RAIN
CHANCE PRECIP (%) 20 0 60
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 67 (-5) 53 (+1) 68
RH % (24H TREND) 54 (-30) 81 (-15) 63
WIND 20FT/EARLY(MPH) NE 7 E 8 E 8
WIND 20FT/LATE(MPH) NE 8 E 8 E 10 G18
PRECIP AMOUNT 0.01 0.00 0.03
PRECIP DURATION 0 3
PRECIP BEGIN 6 AM 10 AM
PRECIP END 9 AM CONTINUING
MIXING HGT(M-AGL/MSL) 940 710
MIXING HGT(FT-AGL/MSL)3090 2320
TRANSPORT WND (MPH) E 15 SE 20
VENT RATE (KT-FT) 40170 39440
CATEGORY DAY 3 3
INVERSION 51F/8AM 8PM 55F/4AM
DISPERSION 3 3
MAX ADI EARLY 33 FAIR 21 FAIR 46 GEN GOOD
MAX ADI LATE 46 GEN GOOD 12 POOR 42 GEN GOOD
MAX LVORI EARLY 4 3 3
MAX LVORI LATE 3 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ003-212030-
OHIO-
INCLUDING THE CITY OF WHEELING
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY PCLDY MCLDY
PRECIP TYPE RAIN NONE RAIN
CHANCE PRECIP (%) 40 0 60
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 65 (-9) 53 (0) 68
RH % (24H TREND) 59 (-24) 86 (-8) 65
WIND 20FT/EARLY(MPH) NE 7 NE 8 E 8
WIND 20FT/LATE(MPH) NE 8 E 7 E 9 G18
PRECIP AMOUNT 0.02 0.00 0.05
PRECIP DURATION 1 4
PRECIP BEGIN 6 AM 10 AM
PRECIP END 9 AM CONTINUING
MIXING HGT(M-AGL/MSL) 800 660
MIXING HGT(FT-AGL/MSL)2630 2170
TRANSPORT WND (MPH) E 16 E 21
VENT RATE (KT-FT) 36820 39060
CATEGORY DAY 3 3
INVERSION 51F/6AM 9PM 55F/4AM
DISPERSION 3 3
MAX ADI EARLY 32 FAIR 22 FAIR 42 GEN GOOD
MAX ADI LATE 46 GEN GOOD 12 POOR 46 GEN GOOD
MAX LVORI EARLY 5 3 4
MAX LVORI LATE 3 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ004-212030-
MARSHALL-
INCLUDING THE CITY OF MOUNDSVILLE
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE RAIN NONE RAIN
CHANCE PRECIP (%) 70 0 70
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 66 (-8) 54 (+1) 70
RH % (24H TREND) 66 (-17) 87 (-11) 70
WIND 20FT/EARLY(MPH) NE 7 NE 7 E 7
WIND 20FT/LATE(MPH) NE 8 E 6 E 8 G17
PRECIP AMOUNT 0.07 0.00 0.07
PRECIP DURATION 2 4
PRECIP BEGIN 6 AM 10 AM
PRECIP END 12 PM CONTINUING
MIXING HGT(M-AGL/MSL) 730 640
MIXING HGT(FT-AGL/MSL)2400 2110
TRANSPORT WND (MPH) E 15 E 18
VENT RATE (KT-FT) 31200 33760
CATEGORY DAY 3 3
INVERSION 52F/6AM 9PM 56F/4AM
DISPERSION 3 3
MAX ADI EARLY 28 FAIR 21 FAIR 39 FAIR
MAX ADI LATE 41 GEN GOOD 9 POOR 45 GEN GOOD
MAX LVORI EARLY 5 4 4
MAX LVORI LATE 4 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ012-212030-
WETZEL-
INCLUDING THE CITY OF NEW MARTINSVILLE
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE RAIN NONE TSTMS
CHANCE PRECIP (%) 90 0 70
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 65 (-11) 55 (+1) 69
RH % (24H TREND) 72 (-6) 89 (-11) 75
WIND 20FT/EARLY(MPH) NE 6 NE 6 E 6
WIND 20FT/LATE(MPH) NE 6 E 5 E 7
PRECIP AMOUNT 0.16 0.00 0.08
PRECIP DURATION 4 4
PRECIP BEGIN 6 AM 6 AM
PRECIP END 4 PM CONTINUING
MIXING HGT(M-AGL/MSL) 690 640
MIXING HGT(FT-AGL/MSL)2280 2100
TRANSPORT WND (MPH) E 14 SE 17
VENT RATE (KT-FT) 27360 31500
CATEGORY DAY 3 3
INVERSION 53F/6AM 9PM 64F/10AM
DISPERSION 3 3
MAX ADI EARLY 22 FAIR 12 POOR 36 FAIR
MAX ADI LATE 37 FAIR 8 POOR 43 GEN GOOD
MAX LVORI EARLY 5 4 4
MAX LVORI LATE 4 5 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ021-212030-
MARION-
INCLUDING THE CITY OF FAIRMONT
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE RAIN NONE TSTMS
CHANCE PRECIP (%) 90 0 70
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 63 (-16) 53 (-1) 67
RH % (24H TREND) 78 (+4) 94 (-6) 75
WIND 20FT/EARLY(MPH) NE 6 NE 5 E 6
WIND 20FT/LATE(MPH) NE 5 LGT/VAR E 7 G17
PRECIP AMOUNT 0.25 0.00 0.04
PRECIP DURATION 6 4
PRECIP BEGIN 6 AM 9 AM
PRECIP END 5 PM CONTINUING
MIXING HGT(M-AGL/MSL) 580 600
MIXING HGT(FT-AGL/MSL)1920 1970
TRANSPORT WND (MPH) E 13 SE 17
VENT RATE (KT-FT) 21120 29550
CATEGORY DAY 2 3
INVERSION 53F/6AM 8PM 59F/8AM
DISPERSION 2 3
MAX ADI EARLY 19 GEN POOR 8 POOR 37 FAIR
MAX ADI LATE 30 FAIR 8 POOR 41 GEN GOOD
MAX LVORI EARLY 5 4 5
MAX LVORI LATE 5 6 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ509-212030-
MONONGALIA-
INCLUDING THE CITY OF MORGANTOWN
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE RAIN NONE TSTMS
CHANCE PRECIP (%) 90 0 60
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 64 (-15) 53 (-1) 66
RH % (24H TREND) 74 (0) 91 (-9) 71
WIND 20FT/EARLY(MPH) NE 6 E 5 E 6 G17
WIND 20FT/LATE(MPH) NE 5 LGT/VAR E 8 G17
PRECIP AMOUNT 0.31 0.00 0.04
PRECIP DURATION 6 4
PRECIP BEGIN 6 AM 10 AM
PRECIP END 5 PM CONTINUING
MIXING HGT(M-AGL/MSL) 600 640
MIXING HGT(FT-AGL/MSL)1970 2090
TRANSPORT WND (MPH) E 13 SE 17
VENT RATE (KT-FT) 21670 31350
CATEGORY DAY 2 3
INVERSION 54F/6AM 8PM 55F/4AM
DISPERSION 2 3
MAX ADI EARLY 19 GEN POOR 8 POOR 43 GEN GOOD
MAX ADI LATE 29 FAIR 8 POOR 42 GEN GOOD
MAX LVORI EARLY 5 4 5
MAX LVORI LATE 5 5 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ510-212030-
RIDGES OF EASTERN MONONGALIA AND NORTHWESTERN PRESTON-
INCLUDING THE CITY OF COOPERS ROCK
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE RAIN NONE RAIN
CHANCE PRECIP (%) 100 0 60
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 61 (-15) 51 (-4) 64
RH % (24H TREND) 76 (+1) 94 (-6) 71
WIND 20FT/EARLY(MPH) LGT/VAR E 6 E 9 G19
WIND 20FT/LATE(MPH) E 5 E 6 E 9 G19
PRECIP AMOUNT 0.39 0.00 0.03
PRECIP DURATION 6 4
PRECIP BEGIN 6 AM 10 AM
PRECIP END 5 PM CONTINUING
MIXING HGT(M-AGL/MSL) 510 570
MIXING HGT(FT-AGL/MSL)1680 1880
TRANSPORT WND (MPH) E 12 SE 21
VENT RATE (KT-FT) 16800 33840
CATEGORY DAY 2 3
INVERSION 55F/10AM 8PM 53F/4AM
DISPERSION 2 3
MAX ADI EARLY 16 GEN POOR 11 POOR 40 FAIR
MAX ADI LATE 24 FAIR 12 POOR 47 GEN GOOD
MAX LVORI EARLY 8 4 4
MAX LVORI LATE 5 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ511-212030-
PRESTON-
INCLUDING THE CITIES OF KINGWOOD AND BRUCETON MILLS
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE RAIN NONE RAIN
CHANCE PRECIP (%) 100 0 60
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 64 (-14) 50 (-6) 65
RH % (24H TREND) 74 (+2) 96 (-3) 69
WIND 20FT/EARLY(MPH) LGT/VAR E 5 E 8 G20
WIND 20FT/LATE(MPH) LGT/VAR E 5 G17 E 9 G20
PRECIP AMOUNT 0.44 0.00 0.03
PRECIP DURATION 8 4
PRECIP BEGIN 6 AM 6 AM
PRECIP END 6 PM CONTINUING
MIXING HGT(M-AGL/MSL) 500 550
MIXING HGT(FT-AGL/MSL)1630 1790
TRANSPORT WND (MPH) E 13 SE 21
VENT RATE (KT-FT) 17930 32220
CATEGORY DAY 2 3
INVERSION 58F/10AM 8PM 53F/4AM
DISPERSION 2 3
MAX ADI EARLY 17 GEN POOR 10 POOR 40 FAIR
MAX ADI LATE 25 FAIR 12 POOR 41 GEN GOOD
MAX LVORI EARLY 7 4 5
MAX LVORI LATE 5 6 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ512-212030-
EASTERN PRESTON-
INCLUDING THE CITIES OF TERRA ALTA, ROWLESBURG, AND HAZELTON
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE RAIN RAIN RAIN
CHANCE PRECIP (%) 100 30 70
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 63 (-14) 49 (-7) 62
RH % (24H TREND) 76 (+2) 98 (-1) 71
WIND 20FT/EARLY(MPH) LGT/VAR E 7 G17 E 9 G22
WIND 20FT/LATE(MPH) E 5 E 7 G19 E 10 G22
PRECIP AMOUNT 0.46 0.00 0.03
PRECIP DURATION 9 1 4
PRECIP BEGIN 6 AM 2 AM CONTINUING
PRECIP END 6 PM CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 430 460
MIXING HGT(FT-AGL/MSL)1420 1510
TRANSPORT WND (MPH) E 14 SE 22
VENT RATE (KT-FT) 17040 28690
CATEGORY DAY 2 3
INVERSION 57F/8AM 8PM 54F/8AM
DISPERSION 2 3
MAX ADI EARLY 18 GEN POOR 13 GEN POOR 37 FAIR
MAX ADI LATE 24 FAIR 15 GEN POOR 37 FAIR
MAX LVORI EARLY 7 4 5
MAX LVORI LATE 5 5 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ513-212030-
WESTERN TUCKER-
INCLUDING THE CITIES OF PARSONS, HENDRICKS, AND SAINT GEORGE
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE TSTMS RAIN RAIN
CHANCE PRECIP (%) 100 30 80
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 66 (-15) 51 (-6) 64
RH % (24H TREND) 70 (+9) 97 (-2) 66
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR E 6 G17
WIND 20FT/LATE(MPH) LGT/VAR LGT/VAR SE 8 G17
PRECIP AMOUNT 0.48 0.01 0.04
PRECIP DURATION 9 1 8
PRECIP BEGIN 6 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 470 500
MIXING HGT(FT-AGL/MSL)1530 1630
TRANSPORT WND (MPH) E 9 SE 18
VENT RATE (KT-FT) 12240 26080
CATEGORY DAY 1 3
INVERSION 58F/9AM 8PM 55F/8AM
DISPERSION 1 3
MAX ADI EARLY 15 GEN POOR 8 POOR 32 FAIR
MAX ADI LATE 18 GEN POOR 8 POOR 37 FAIR
MAX LVORI EARLY 7 4 5
MAX LVORI LATE 5 6 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ514-212030-
EASTERN TUCKER-
INCLUDING THE CITIES OF DAVIS, THOMAS, AND CANAAN VALLEY
200 AM EDT THU MAY 21 2026
TODAY TONIGHT FRI
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE TSTMS RAIN RAIN
CHANCE PRECIP (%) 100 50 90
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 62 (-15) 46 (-8) 58
RH % (24H TREND) 79 (+17) 100 (0) 80
WIND 20FT/EARLY(MPH) LGT/VAR E 5 E 7 G19
WIND 20FT/LATE(MPH) LGT/VAR SE 5 E 8 G19
PRECIP AMOUNT 0.61 0.03 0.10
PRECIP DURATION 10 2 8
PRECIP BEGIN 6 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 390 430
MIXING HGT(FT-AGL/MSL)1280 1400
TRANSPORT WND (MPH) E 10 SE 18
VENT RATE (KT-FT) 11520 22400
CATEGORY DAY 1 2
INVERSION 56F/9AM 5PM 52F/9AM
DISPERSION 1 2
MAX ADI EARLY 17 GEN POOR 10 POOR 29 FAIR
MAX ADI LATE 16 GEN POOR 10 POOR 33 FAIR
MAX LVORI EARLY 7 6 6
MAX LVORI LATE 6 7 5
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
FORECAST FOR DAYS 3 THROUGH 7
SATURDAY
RAIN. LOWS IN THE LOWER 50S. HIGHS IN THE MID 60S.
EAST WINDS AROUND 10 MPH.
SUNDAY
SHOWERS AND A CHANCE OF THUNDERSTORMS. WARMER. LOWS IN
THE MID 50S. HIGHS AROUND 80. SOUTHEAST WINDS 5 TO 10 MPH.
MONDAY
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. LOWS AROUND 60. HIGHS IN THE UPPER 70S. SOUTHWEST
WINDS AROUND 5 MPH.
TUESDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN THE
UPPER 50S. HIGHS IN THE UPPER 70S. NORTHEAST WINDS AROUND 5 MPH.
WEDNESDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE
LOWER 60S. HIGHS AROUND 80. EAST WINDS AROUND 5 MPH.
WM
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