180
FNUS51 KPBZ 200523
FWFPBZ
FIRE WEATHER PLANNING FORECAST
NATIONAL WEATHER SERVICE PITTSBURGH PA
123 AM EDT MON APR 20 2026
DISCUSSION
SCATTERED RAIN AND SNOW SHOWERS WILL END EARLY THIS MORNING AS
HIGH PRESSURE BEGINS TO BUILD IN ACROSS THE REGION. DRY WEATHER IS
THEN EXPECTED THROUGH TUESDAY AS THE HIGH MOVES EAST. LOW RELATIVE
HUMIDITY LEVELS FROM 20 TO 30 PERCENT ARE EXPECTED THIS AFTERNOON
AS DRY AIR ALOFT MIXES TO THE SURFACE. SUSTAINED WIND TODAY IS
EXPECTED TO BE FROM THE NORTHWEST AT AROUND 10 MPH, WITH A FEW
GUSTS FROM 15 TO 20 MPH. RELATIVE HUMIDITY LEVELS ARE EXPECTED TO
RANGE FROM 25 TO 35 PERCENT ON TUESDAY, WITH SOUTHWEST WIND FROM
10 TO 15 MPH. RAIN CHANCES RETURN WITH A TUESDAY NIGHT AND
WEDNESDAY COLD FRONT.
OHZ039-202045-
TUSCARAWAS-
INCLUDING THE CITIES OF NEW PHILADELPHIA AND DOVER
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 49 (-5) 29 (-4) 68
RH % (24H TREND) 26 (-8) 61 (-21) 33
WIND 20FT/EARLY(MPH) NW 5 LGT/VAR S 6 G17
WIND 20FT/LATE(MPH) NW 8 LGT/VAR SW 10 G19
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2200 1480
MIXING HGT(FT-AGL/MSL)7210 4870
TRANSPORT WND (MPH) NW 20 SW 25
VENT RATE (KT-FT) 122570 107140
CATEGORY DAY 5 5
INVERSION 34F/8AM 8PM 40F/9AM
DISPERSION 5 5
MAX ADI EARLY 116 VERY GOOD6 VERY POOR 65 GOOD
MAX ADI LATE 144 VERY GOOD5 VERY POOR 119 VERY GOOD
MAX LVORI EARLY 4 2 2
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ040-202045-
CARROLL-
INCLUDING THE CITIES OF CARROLLTON AND MALVERN
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY CLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 47 (-5) 28 (-4) 67
RH % (24H TREND) 26 (-9) 61 (-22) 32
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR S 7
WIND 20FT/LATE(MPH) NW 9 LGT/VAR SW 11 G19
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2130 1340
MIXING HGT(FT-AGL/MSL)7000 4400
TRANSPORT WND (MPH) NW 20 SW 25
VENT RATE (KT-FT) 119000 96800
CATEGORY DAY 5 4
INVERSION 33F/8AM 8PM 40F/9AM
DISPERSION 5 4
MAX ADI EARLY 110 VERY GOOD8 POOR 65 GOOD
MAX ADI LATE 145 VERY GOOD5 VERY POOR 96 GOOD
MAX LVORI EARLY 4 2 2
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ041-202045-
COLUMBIANA-
INCLUDING THE CITIES OF EAST LIVERPOOL, SALEM, AND COLUMBIANA
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY CLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 47 (-5) 27 (-5) 66
RH % (24H TREND) 27 (-11) 64 (-25) 32
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR S 6
WIND 20FT/LATE(MPH) NW 9 LGT/VAR SW 11 G19
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2170 1290
MIXING HGT(FT-AGL/MSL)7120 4220
TRANSPORT WND (MPH) NW 20 SW 24
VENT RATE (KT-FT) 121040 88620
CATEGORY DAY 5 4
INVERSION 32F/8AM 8PM 39F/9AM
DISPERSION 5 4
MAX ADI EARLY 86 GOOD 8 POOR 64 GOOD
MAX ADI LATE 147 VERY GOOD4 VERY POOR 92 GOOD
MAX LVORI EARLY 4 2 2
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ048-202045-
COSHOCTON-
INCLUDING THE CITY OF COSHOCTON
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 49 (-5) 29 (-4) 70
RH % (24H TREND) 25 (-7) 63 (-22) 34
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR S 5
WIND 20FT/LATE(MPH) NW 6 LGT/VAR SW 10 G18
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2320 1680
MIXING HGT(FT-AGL/MSL)7600 5500
TRANSPORT WND (MPH) NW 17 SW 28
VENT RATE (KT-FT) 114000 132000
CATEGORY DAY 5 5
INVERSION 34F/8AM 8PM 41F/9AM
DISPERSION 5 5
MAX ADI EARLY 121 VERY GOOD5 VERY POOR 62 GOOD
MAX ADI LATE 142 VERY GOOD5 VERY POOR 142 VERY GOOD
MAX LVORI EARLY 5 2 2
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ049-202045-
HARRISON-
INCLUDING THE CITY OF CADIZ
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY CLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 49 (-5) 28 (-5) 68
RH % (24H TREND) 24 (-6) 62 (-20) 31
WIND 20FT/EARLY(MPH) N 6 LGT/VAR S 6
WIND 20FT/LATE(MPH) NW 8 LGT/VAR SW 10 G19
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2190 1460
MIXING HGT(FT-AGL/MSL)7190 4790
TRANSPORT WND (MPH) NW 20 SW 24
VENT RATE (KT-FT) 122230 100590
CATEGORY DAY 5 5
INVERSION 34F/8AM 8PM 40F/9AM
DISPERSION 5 5
MAX ADI EARLY 124 VERY GOOD7 POOR 67 GOOD
MAX ADI LATE 146 VERY GOOD4 VERY POOR 114 VERY GOOD
MAX LVORI EARLY 4 2 2
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ050-202045-
JEFFERSON OH-
INCLUDING THE CITY OF STEUBENVILLE
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY CLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 48 (-5) 28 (-6) 67
RH % (24H TREND) 25 (-6) 60 (-21) 29
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR S 6
WIND 20FT/LATE(MPH) NW 9 LGT/VAR SW 10 G19
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2210 1420
MIXING HGT(FT-AGL/MSL)7260 4670
TRANSPORT WND (MPH) NW 20 SW 23
VENT RATE (KT-FT) 123420 93400
CATEGORY DAY 5 4
INVERSION 34F/8AM 8PM 40F/9AM
DISPERSION 5 4
MAX ADI EARLY 121 VERY GOOD11 POOR 65 GOOD
MAX ADI LATE 143 VERY GOOD3 VERY POOR 97 GOOD
MAX LVORI EARLY 4 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ057-202045-
MUSKINGUM-
INCLUDING THE CITY OF ZANESVILLE
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 51 (-4) 30 (-4) 71
RH % (24H TREND) 24 (-5) 64 (-21) 31
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR S 5
WIND 20FT/LATE(MPH) NW 6 LGT/VAR SW 9 G20
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2330 1710
MIXING HGT(FT-AGL/MSL)7640 5610
TRANSPORT WND (MPH) NW 16 SW 26
VENT RATE (KT-FT) 106960 129030
CATEGORY DAY 5 5
INVERSION 35F/8AM 8PM 42F/9AM
DISPERSION 5 5
MAX ADI EARLY 115 VERY GOOD5 VERY POOR 60 GEN GOOD
MAX ADI LATE 134 VERY GOOD5 VERY POOR 149 VERY GOOD
MAX LVORI EARLY 4 2 2
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ058-202045-
GUERNSEY-
INCLUDING THE CITY OF CAMBRIDGE
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 51 (-4) 30 (-4) 70
RH % (24H TREND) 23 (-7) 62 (-21) 31
WIND 20FT/EARLY(MPH) N 5 LGT/VAR S 5
WIND 20FT/LATE(MPH) NW 6 LGT/VAR SW 9 G18
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2330 1590
MIXING HGT(FT-AGL/MSL)7650 5210
TRANSPORT WND (MPH) NW 18 SW 24
VENT RATE (KT-FT) 122400 109410
CATEGORY DAY 5 5
INVERSION 35F/8AM 8PM 42F/9AM
DISPERSION 5 5
MAX ADI EARLY 114 VERY GOOD6 VERY POOR 62 GOOD
MAX ADI LATE 142 VERY GOOD4 VERY POOR 142 VERY GOOD
MAX LVORI EARLY 4 2 2
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ059-202045-
BELMONT-
INCLUDING THE CITIES OF MARTINS FERRY AND ST. CLAIRSVILLE
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 50 (-5) 29 (-6) 68
RH % (24H TREND) 24 (-8) 63 (-19) 29
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR S 6
WIND 20FT/LATE(MPH) NW 8 G17 LGT/VAR SW 10 G19
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2340 1480
MIXING HGT(FT-AGL/MSL)7680 4850
TRANSPORT WND (MPH) NW 20 SW 24
VENT RATE (KT-FT) 130560 101850
CATEGORY DAY 5 5
INVERSION 35F/8AM 8PM 41F/9AM
DISPERSION 5 5
MAX ADI EARLY 117 VERY GOOD7 POOR 62 GOOD
MAX ADI LATE 150 VERY GOOD4 VERY POOR 118 VERY GOOD
MAX LVORI EARLY 4 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ068-202045-
NOBLE-
INCLUDING THE CITY OF CALDWELL
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 52 (-4) 30 (-5) 71
RH % (24H TREND) 24 (-4) 65 (-20) 30
WIND 20FT/EARLY(MPH) N 5 LGT/VAR S 5
WIND 20FT/LATE(MPH) NW 6 LGT/VAR SW 9 G18
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2350 1670
MIXING HGT(FT-AGL/MSL)7710 5490
TRANSPORT WND (MPH) NW 16 SW 23
VENT RATE (KT-FT) 107940 109800
CATEGORY DAY 5 5
INVERSION 36F/8AM 8PM 43F/9AM
DISPERSION 5 5
MAX ADI EARLY 111 VERY GOOD6 VERY POOR 57 GEN GOOD
MAX ADI LATE 141 VERY GOOD4 VERY POOR 140 VERY GOOD
MAX LVORI EARLY 5 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ069-202045-
MONROE-
INCLUDING THE CITY OF WOODSFIELD
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER MCLEAR CLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 52 (-4) 30 (-6) 70
RH % (24H TREND) 24 (-5) 64 (-18) 28
WIND 20FT/EARLY(MPH) N 5 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 7 LGT/VAR SW 8 G18
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2430 1590
MIXING HGT(FT-AGL/MSL)7960 5200
TRANSPORT WND (MPH) NW 18 SW 23
VENT RATE (KT-FT) 127360 104000
CATEGORY DAY 5 4
INVERSION 37F/8AM 8PM 42F/9AM
DISPERSION 5 4
MAX ADI EARLY 110 VERY GOOD6 VERY POOR 57 GEN GOOD
MAX ADI LATE 147 VERY GOOD4 VERY POOR 134 VERY GOOD
MAX LVORI EARLY 4 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ007-202045-
MERCER-
INCLUDING THE CITIES OF SHARON, HERMITAGE, AND GROVE CITY
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY CLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 45 (-5) 24 (-5) 64
RH % (24H TREND) 32 (-10) 72 (-25) 36
WIND 20FT/EARLY(MPH) NW 7 LGT/VAR S 7
WIND 20FT/LATE(MPH) NW 9 LGT/VAR S 11 G18
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2010 1150
MIXING HGT(FT-AGL/MSL)6580 3770
TRANSPORT WND (MPH) NW 20 SW 23
VENT RATE (KT-FT) 111860 75400
CATEGORY DAY 5 4
INVERSION 28F/7AM 8PM 37F/9AM
DISPERSION 5 4
MAX ADI EARLY 94 GOOD 9 POOR 66 GOOD
MAX ADI LATE 96 GOOD 4 VERY POOR 82 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.
PAZ008-202045-
VENANGO-
INCLUDING THE CITIES OF OIL CITY AND FRANKLIN
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY CLEAR PCLDY
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 44 (-5) 23 (-6) 62
RH % (24H TREND) 31 (-14) 75 (-17) 36
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR S 5
WIND 20FT/LATE(MPH) NW 8 LGT/VAR S 8
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 1960 1170
MIXING HGT(FT-AGL/MSL)6440 3820
TRANSPORT WND (MPH) NW 20 SW 22
VENT RATE (KT-FT) 109480 72580
CATEGORY DAY 5 4
INVERSION 29F/6AM 8PM 35F/9AM
DISPERSION 5 4
MAX ADI EARLY 101 VERY GOOD6 VERY POOR 63 GOOD
MAX ADI LATE 133 VERY GOOD3 VERY POOR 93 GOOD
MAX LVORI EARLY 3 3 3
MAX LVORI LATE 1 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ009-202045-
FOREST-
INCLUDING THE CITY OF TIONESTA
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SNOW SHOWERS NONE NONE
CHANCE PRECIP (%) 30 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 42 (-5) 22 (-6) 59
RH % (24H TREND) 28 (-13) 76 (-18) 35
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 7 LGT/VAR S 7
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION 1
PRECIP BEGIN 6 AM
PRECIP END 8 AM
MIXING HGT(M-AGL/MSL) 2070 1200
MIXING HGT(FT-AGL/MSL)6780 3920
TRANSPORT WND (MPH) NW 18 SW 21
VENT RATE (KT-FT) 108480 70560
CATEGORY DAY 5 4
INVERSION 28F/6AM 10PM 30F/8AM
DISPERSION 5 4
MAX ADI EARLY 118 VERY GOOD7 POOR 64 GOOD
MAX ADI LATE 139 VERY GOOD3 VERY POOR 92 GOOD
MAX LVORI EARLY 3 3 3
MAX LVORI LATE 1 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ013-202045-
LAWRENCE-
INCLUDING THE CITIES OF NEW CASTLE AND ELLWOOD CITY
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY CLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 46 (-6) 25 (-6) 65
RH % (24H TREND) 29 (-11) 70 (-23) 33
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR S 5
WIND 20FT/LATE(MPH) NW 9 LGT/VAR S 9
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2200 1240
MIXING HGT(FT-AGL/MSL)7220 4060
TRANSPORT WND (MPH) NW 20 SW 22
VENT RATE (KT-FT) 122740 77140
CATEGORY DAY 5 4
INVERSION 32F/8AM 8PM 38F/9AM
DISPERSION 5 4
MAX ADI EARLY 110 VERY GOOD7 POOR 68 GOOD
MAX ADI LATE 143 VERY GOOD4 VERY POOR 95 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.
PAZ014-202045-
BUTLER-
INCLUDING THE CITY OF BUTLER
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY CLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 46 (-5) 24 (-6) 65
RH % (24H TREND) 32 (-13) 74 (-17) 34
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 9 LGT/VAR S 9
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2190 1270
MIXING HGT(FT-AGL/MSL)7200 4160
TRANSPORT WND (MPH) NW 20 SW 21
VENT RATE (KT-FT) 122400 74880
CATEGORY DAY 5 4
INVERSION 31F/6AM 8PM 36F/9AM
DISPERSION 5 4
MAX ADI EARLY 114 VERY GOOD8 POOR 60 GEN GOOD
MAX ADI LATE 138 VERY GOOD3 VERY POOR 93 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.
PAZ015-202045-
CLARION-
INCLUDING THE CITY OF CLARION
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SNOW SHOWERS NONE NONE
CHANCE PRECIP (%) 30 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 45 (-4) 24 (-5) 62
RH % (24H TREND) 29 (-12) 75 (-18) 35
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 9 G17 LGT/VAR S 8
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION 1
PRECIP BEGIN 6 AM
PRECIP END 8 AM
MIXING HGT(M-AGL/MSL) 2120 1240
MIXING HGT(FT-AGL/MSL)6940 4060
TRANSPORT WND (MPH) NW 20 SW 21
VENT RATE (KT-FT) 117980 73080
CATEGORY DAY 5 4
INVERSION 29F/6AM 8PM 35F/9AM
DISPERSION 5 4
MAX ADI EARLY 118 VERY GOOD8 POOR 60 GEN GOOD
MAX ADI LATE 141 VERY GOOD3 VERY POOR 95 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.
PAZ016-202045-
JEFFERSON PA-
INCLUDING THE CITIES OF PUNXSUTAWNEY AND BROOKVILLE
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR PCLDY
PRECIP TYPE SNOW SHOWERS NONE NONE
CHANCE PRECIP (%) 30 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 43 (-5) 23 (-7) 60
RH % (24H TREND) 27 (-11) 71 (-21) 32
WIND 20FT/EARLY(MPH) NW 7 G17 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 9 G18 LGT/VAR SW 7
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION 1
PRECIP BEGIN 6 AM
PRECIP END 9 AM
MIXING HGT(M-AGL/MSL) 2180 1270
MIXING HGT(FT-AGL/MSL)7140 4180
TRANSPORT WND (MPH) NW 21 SW 18
VENT RATE (KT-FT) 128520 66880
CATEGORY DAY 5 4
INVERSION 30F/6AM 8PM 35F/9AM
DISPERSION 5 4
MAX ADI EARLY 116 VERY GOOD12 POOR 58 GEN GOOD
MAX ADI LATE 143 VERY GOOD2 VERY POOR 91 GOOD
MAX LVORI EARLY 3 2 3
MAX LVORI LATE 1 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ020-202045-
BEAVER-
INCLUDING THE CITIES OF ALIQUIPPA, BEAVER FALLS, AMBRIDGE,
AND MONACA
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY CLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 47 (-5) 28 (-6) 66
RH % (24H TREND) 27 (-10) 65 (-22) 30
WIND 20FT/EARLY(MPH) NW 5 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 8 LGT/VAR SW 9 G17
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2240 1370
MIXING HGT(FT-AGL/MSL)7340 4510
TRANSPORT WND (MPH) NW 20 SW 22
VENT RATE (KT-FT) 124780 85690
CATEGORY DAY 5 4
INVERSION 33F/6AM 8PM 39F/9AM
DISPERSION 5 4
MAX ADI EARLY 118 VERY GOOD8 POOR 63 GOOD
MAX ADI LATE 147 VERY GOOD3 VERY POOR 112 VERY GOOD
MAX LVORI EARLY 4 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ021-202045-
ALLEGHENY-
INCLUDING THE CITY OF PITTSBURGH METRO AREA
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 48 (-5) 26 (-9) 66
RH % (24H TREND) 28 (-9) 70 (-10) 30
WIND 20FT/EARLY(MPH) NW 7 NW 5 LGT/VAR
WIND 20FT/LATE(MPH) NW 10 G17 LGT/VAR SW 9 G17
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2360 1460
MIXING HGT(FT-AGL/MSL)7740 4790
TRANSPORT WND (MPH) NW 20 SW 22
VENT RATE (KT-FT) 131580 91010
CATEGORY DAY 5 4
INVERSION 35F/6AM 8PM 39F/9AM
DISPERSION 5 4
MAX ADI EARLY 122 VERY GOOD12 POOR 60 GEN GOOD
MAX ADI LATE 144 VERY GOOD3 VERY POOR 97 GOOD
MAX LVORI EARLY 3 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ022-202045-
ARMSTRONG-
INCLUDING THE CITIES OF KITTANNING AND FORD CITY
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 47 (-3) 24 (-7) 64
RH % (24H TREND) 30 (-13) 75 (-18) 33
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 9 G17 LGT/VAR SW 7
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2210 1380
MIXING HGT(FT-AGL/MSL)7250 4540
TRANSPORT WND (MPH) NW 20 SW 20
VENT RATE (KT-FT) 123250 77180
CATEGORY DAY 5 4
INVERSION 32F/6AM 8PM 36F/9AM
DISPERSION 5 4
MAX ADI EARLY 116 VERY GOOD12 POOR 60 GEN GOOD
MAX ADI LATE 142 VERY GOOD3 VERY POOR 97 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.
PAZ029-202045-
WASHINGTON-
INCLUDING THE CITIES OF WASHINGTON AND CANONSBURG
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 48 (-5) 27 (-8) 66
RH % (24H TREND) 27 (-8) 68 (-12) 30
WIND 20FT/EARLY(MPH) NW 7 LGT/VAR S 5
WIND 20FT/LATE(MPH) NW 10 G17 LGT/VAR SW 10 G18
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2270 1450
MIXING HGT(FT-AGL/MSL)7440 4770
TRANSPORT WND (MPH) NW 20 SW 22
VENT RATE (KT-FT) 126480 90630
CATEGORY DAY 5 4
INVERSION 35F/6AM 8PM 40F/9AM
DISPERSION 5 4
MAX ADI EARLY 129 VERY GOOD12 POOR 59 GEN GOOD
MAX ADI LATE 143 VERY GOOD3 VERY POOR 92 GOOD
MAX LVORI EARLY 4 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ031-202045-
GREENE-
INCLUDING THE CITY OF WAYNESBURG
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 49 (-5) 28 (-8) 67
RH % (24H TREND) 30 (-7) 70 (-11) 30
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 8 LGT/VAR SW 8
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2380 1540
MIXING HGT(FT-AGL/MSL)7820 5050
TRANSPORT WND (MPH) NW 20 SW 22
VENT RATE (KT-FT) 132940 95950
CATEGORY DAY 5 4
INVERSION 36F/6AM 8PM 40F/9AM
DISPERSION 5 4
MAX ADI EARLY 130 VERY GOOD8 POOR 57 GEN GOOD
MAX ADI LATE 156 VERY GOOD3 VERY POOR 126 VERY GOOD
MAX LVORI EARLY 4 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ073-202045-
WESTMORELAND-
INCLUDING THE CITIES OF MURRYSVILLE, GREENSBURG, NEW KENSINGTON,
LOWER BURRELL, LATROBE, AND MONESSEN
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 47 (-5) 26 (-8) 65
RH % (24H TREND) 31 (-5) 73 (-12) 32
WIND 20FT/EARLY(MPH) NW 8 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 10 LGT/VAR SW 9
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2340 1430
MIXING HGT(FT-AGL/MSL)7690 4710
TRANSPORT WND (MPH) NW 20 SW 21
VENT RATE (KT-FT) 130730 84780
CATEGORY DAY 5 4
INVERSION 34F/6AM 8PM 39F/9AM
DISPERSION 5 4
MAX ADI EARLY 121 VERY GOOD24 FAIR 55 GEN GOOD
MAX ADI LATE 93 GOOD 3 VERY POOR 100 GOOD
MAX LVORI EARLY 4 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ074-202045-
HIGHER ELEVATIONS OF WESTMORELAND-
INCLUDING THE CITIES OF LIGONIER AND DONEGAL
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SNOW SHOWERS NONE NONE
CHANCE PRECIP (%) 30 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 47 (-3) 26 (-7) 65
RH % (24H TREND) 29 (-8) 66 (-17) 28
WIND 20FT/EARLY(MPH) NW 7 G18 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 9 G20 LGT/VAR SW 7
PRECIP AMOUNT 0.01 0.00 0.00
PRECIP DURATION 1
PRECIP BEGIN 6 AM
PRECIP END 9 AM
MIXING HGT(M-AGL/MSL) 2230 1370
MIXING HGT(FT-AGL/MSL)7310 4490
TRANSPORT WND (MPH) NW 21 SW 20
VENT RATE (KT-FT) 131580 76330
CATEGORY DAY 5 4
INVERSION 34F/6AM 8PM 38F/9AM
DISPERSION 5 4
MAX ADI EARLY 124 VERY GOOD14 GEN POOR 49 GEN GOOD
MAX ADI LATE 149 VERY GOOD2 VERY POOR 94 GOOD
MAX LVORI EARLY 3 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ075-202045-
FAYETTE-
INCLUDING THE CITY OF UNIONTOWN
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 48 (-5) 27 (-8) 66
RH % (24H TREND) 30 (-6) 72 (-12) 31
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 8 LGT/VAR SW 7
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2370 1540
MIXING HGT(FT-AGL/MSL)7770 5040
TRANSPORT WND (MPH) NW 20 SW 21
VENT RATE (KT-FT) 132090 90720
CATEGORY DAY 5 4
INVERSION 36F/6AM 8PM 40F/9AM
DISPERSION 5 4
MAX ADI EARLY 124 VERY GOOD12 POOR 54 GEN GOOD
MAX ADI LATE 155 VERY GOOD3 VERY POOR 118 VERY 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.
PAZ076-202045-
HIGHER ELEVATIONS OF FAYETTE-
INCLUDING THE CITIES OF CHAMPION AND OHIOPYLE
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE FRZ RAIN NONE NONE
CHANCE PRECIP (%) 30 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 45 (-5) 26 (-7) 63
RH % (24H TREND) 31 (-6) 68 (-18) 30
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 7 G17 LGT/VAR SW 6
PRECIP AMOUNT 0.01 0.00 0.00
PRECIP DURATION 1
PRECIP BEGIN 6 AM
PRECIP END 9 AM
MIXING HGT(M-AGL/MSL) 2210 1390
MIXING HGT(FT-AGL/MSL)7260 4570
TRANSPORT WND (MPH) NW 22 SW 21
VENT RATE (KT-FT) 137940 82260
CATEGORY DAY 5 4
INVERSION 33F/6AM 8PM 38F/9AM
DISPERSION 5 4
MAX ADI EARLY 119 VERY GOOD11 POOR 47 GEN GOOD
MAX ADI LATE 154 VERY GOOD3 VERY POOR 103 VERY 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.
PAZ077-202045-
INDIANA-
INCLUDING THE CITY OF INDIANA
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SNOW SHOWERS NONE NONE
CHANCE PRECIP (%) 30 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 46 (-4) 24 (-8) 63
RH % (24H TREND) 30 (-13) 73 (-18) 31
WIND 20FT/EARLY(MPH) NW 7 G18 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 10 G18 LGT/VAR SW 7
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION 1
PRECIP BEGIN 6 AM
PRECIP END 9 AM
MIXING HGT(M-AGL/MSL) 2220 1340
MIXING HGT(FT-AGL/MSL)7290 4390
TRANSPORT WND (MPH) NW 21 SW 20
VENT RATE (KT-FT) 131220 74630
CATEGORY DAY 5 4
INVERSION 33F/6AM 8PM 37F/9AM
DISPERSION 5 4
MAX ADI EARLY 131 VERY GOOD15 GEN POOR 51 GEN GOOD
MAX ADI LATE 136 VERY GOOD2 VERY POOR 96 GOOD
MAX LVORI EARLY 3 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ078-202045-
HIGHER ELEVATIONS OF INDIANA-
INCLUDING THE CITY OF ARMAGH
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SNOW SHOWERS NONE NONE
CHANCE PRECIP (%) 30 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 45 (-4) 25 (-8) 63
RH % (24H TREND) 30 (-12) 68 (-18) 29
WIND 20FT/EARLY(MPH) NW 8 G18 NW 5 LGT/VAR
WIND 20FT/LATE(MPH) NW 10 G19 LGT/VAR SW 7
PRECIP AMOUNT 0.01 0.00 0.00
PRECIP DURATION 1
PRECIP BEGIN 6 AM
PRECIP END 9 AM
MIXING HGT(M-AGL/MSL) 2150 1310
MIXING HGT(FT-AGL/MSL)7060 4300
TRANSPORT WND (MPH) NW 22 SW 15
VENT RATE (KT-FT) 134140 55900
CATEGORY DAY 5 4
INVERSION 33F/6AM 8PM 37F/9AM
DISPERSION 5 4
MAX ADI EARLY 128 VERY GOOD16 GEN POOR 48 GEN GOOD
MAX ADI LATE 101 VERY GOOD3 VERY POOR 87 GOOD
MAX LVORI EARLY 3 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ001-202045-
HANCOCK-
INCLUDING THE CITY OF WEIRTON
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY CLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 47 (-6) 29 (-5) 66
RH % (24H TREND) 25 (-10) 60 (-25) 29
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR S 5
WIND 20FT/LATE(MPH) NW 8 LGT/VAR SW 9 G17
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2230 1450
MIXING HGT(FT-AGL/MSL)7320 4760
TRANSPORT WND (MPH) NW 20 SW 24
VENT RATE (KT-FT) 124440 99960
CATEGORY DAY 5 4
INVERSION 34F/6AM 8PM 39F/9AM
DISPERSION 5 4
MAX ADI EARLY 113 VERY GOOD8 POOR 64 GOOD
MAX ADI LATE 147 VERY GOOD4 VERY POOR 117 VERY GOOD
MAX LVORI EARLY 4 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ002-202045-
BROOKE-
INCLUDING THE CITIES OF FOLLANSBEE AND WELLSBURG
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 50 (-4) 29 (-7) 67
RH % (24H TREND) 25 (-6) 60 (-18) 28
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR S 5
WIND 20FT/LATE(MPH) NW 9 LGT/VAR SW 9 G17
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2280 1480
MIXING HGT(FT-AGL/MSL)7490 4840
TRANSPORT WND (MPH) NW 20 SW 23
VENT RATE (KT-FT) 127330 96800
CATEGORY DAY 5 4
INVERSION 35F/6AM 8PM 40F/9AM
DISPERSION 5 4
MAX ADI EARLY 130 VERY GOOD11 POOR 60 GEN GOOD
MAX ADI LATE 142 VERY GOOD4 VERY POOR 120 VERY GOOD
MAX LVORI EARLY 4 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ003-202045-
OHIO-
INCLUDING THE CITY OF WHEELING
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY CLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 49 (-5) 29 (-7) 67
RH % (24H TREND) 25 (-2) 62 (-18) 30
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR S 5
WIND 20FT/LATE(MPH) NW 9 LGT/VAR SW 9 G18
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2330 1480
MIXING HGT(FT-AGL/MSL)7640 4850
TRANSPORT WND (MPH) NW 20 SW 23
VENT RATE (KT-FT) 129880 97000
CATEGORY DAY 5 4
INVERSION 35F/8AM 8PM 41F/9AM
DISPERSION 5 4
MAX ADI EARLY 131 VERY GOOD11 POOR 57 GEN GOOD
MAX ADI LATE 154 VERY GOOD4 VERY POOR 123 VERY GOOD
MAX LVORI EARLY 4 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ004-202045-
MARSHALL-
INCLUDING THE CITY OF MOUNDSVILLE
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY CLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 51 (-3) 30 (-7) 69
RH % (24H TREND) 26 (-8) 62 (-17) 30
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 8 LGT/VAR SW 9 G17
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2390 1530
MIXING HGT(FT-AGL/MSL)7850 5030
TRANSPORT WND (MPH) NW 20 SW 23
VENT RATE (KT-FT) 133450 100600
CATEGORY DAY 5 4
INVERSION 37F/8AM 8PM 42F/9AM
DISPERSION 5 4
MAX ADI EARLY 123 VERY GOOD7 POOR 57 GEN GOOD
MAX ADI LATE 156 VERY GOOD4 VERY POOR 128 VERY GOOD
MAX LVORI EARLY 4 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ012-202045-
WETZEL-
INCLUDING THE CITY OF NEW MARTINSVILLE
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY CLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 51 (-3) 30 (-7) 69
RH % (24H TREND) 26 (-8) 65 (-14) 30
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 7 LGT/VAR SW 7
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2480 1610
MIXING HGT(FT-AGL/MSL)8130 5270
TRANSPORT WND (MPH) NW 20 SW 23
VENT RATE (KT-FT) 138210 105400
CATEGORY DAY 5 5
INVERSION 37F/6AM 8PM 41F/9AM
DISPERSION 5 5
MAX ADI EARLY 121 VERY GOOD7 POOR 55 GEN GOOD
MAX ADI LATE 156 VERY GOOD3 VERY POOR 132 VERY GOOD
MAX LVORI EARLY 4 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ021-202045-
MARION-
INCLUDING THE CITY OF FAIRMONT
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 49 (-5) 29 (-7) 67
RH % (24H TREND) 29 (-5) 71 (-13) 30
WIND 20FT/EARLY(MPH) NW 5 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 7 LGT/VAR SW 7
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2570 1620
MIXING HGT(FT-AGL/MSL)8430 5300
TRANSPORT WND (MPH) NW 20 SW 22
VENT RATE (KT-FT) 143310 100700
CATEGORY DAY 5 5
INVERSION 36F/6AM 8PM 40F/9AM
DISPERSION 5 5
MAX ADI EARLY 130 VERY GOOD8 POOR 51 GEN GOOD
MAX ADI LATE 159 VERY GOOD3 VERY POOR 132 VERY 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.
WVZ509-202045-
MONONGALIA-
INCLUDING THE CITY OF MORGANTOWN
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 49 (-5) 29 (-7) 67
RH % (24H TREND) 30 (-6) 70 (-13) 29
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 8 LGT/VAR SW 7
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2510 1570
MIXING HGT(FT-AGL/MSL)8250 5160
TRANSPORT WND (MPH) NW 20 SW 22
VENT RATE (KT-FT) 140250 98040
CATEGORY DAY 5 4
INVERSION 36F/6AM 8PM 41F/9AM
DISPERSION 5 4
MAX ADI EARLY 128 VERY GOOD8 POOR 53 GEN GOOD
MAX ADI LATE 159 VERY GOOD3 VERY POOR 128 VERY GOOD
MAX LVORI EARLY 4 2 3
MAX LVORI LATE 1 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ510-202045-
RIDGES OF EASTERN MONONGALIA AND NORTHWESTERN PRESTON-
INCLUDING THE CITY OF COOPERS ROCK
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE NONE NONE NONE
CHANCE PRECIP (%) 0 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 46 (-4) 27 (-6) 64
RH % (24H TREND) 32 (-5) 70 (-17) 30
WIND 20FT/EARLY(MPH) NW 6 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 7 LGT/VAR SW 6
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION
PRECIP BEGIN
PRECIP END
MIXING HGT(M-AGL/MSL) 2290 1380
MIXING HGT(FT-AGL/MSL)7530 4520
TRANSPORT WND (MPH) NW 21 SW 22
VENT RATE (KT-FT) 135540 85880
CATEGORY DAY 5 4
INVERSION 34F/6AM 8PM 38F/9AM
DISPERSION 5 4
MAX ADI EARLY 119 VERY GOOD8 POOR 41 GEN GOOD
MAX ADI LATE 154 VERY GOOD3 VERY POOR 110 VERY 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.
WVZ511-202045-
PRESTON-
INCLUDING THE CITIES OF KINGWOOD AND BRUCETON MILLS
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SNOW SHOWERS NONE NONE
CHANCE PRECIP (%) 20 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 47 (-4) 27 (-7) 65
RH % (24H TREND) 31 (-5) 71 (-17) 29
WIND 20FT/EARLY(MPH) NW 5 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 7 LGT/VAR SW 6
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION 0
PRECIP BEGIN 6 AM
PRECIP END 9 AM
MIXING HGT(M-AGL/MSL) 2460 1480
MIXING HGT(FT-AGL/MSL)8070 4870
TRANSPORT WND (MPH) NW 22 SW 22
VENT RATE (KT-FT) 153330 92530
CATEGORY DAY 5 4
INVERSION 34F/6AM 8PM 39F/9AM
DISPERSION 5 4
MAX ADI EARLY 132 VERY GOOD8 POOR 41 GEN GOOD
MAX ADI LATE 170 VERY GOOD3 VERY POOR 118 VERY 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.
WVZ512-202045-
EASTERN PRESTON-
INCLUDING THE CITIES OF TERRA ALTA, ROWLESBURG, AND HAZELTON
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SNOW SHOWERS NONE NONE
CHANCE PRECIP (%) 30 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 45 (-4) 27 (-6) 63
RH % (24H TREND) 31 (-9) 71 (-17) 29
WIND 20FT/EARLY(MPH) NW 7 G17 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 8 G18 LGT/VAR SW 6
PRECIP AMOUNT 0.01 0.00 0.00
PRECIP DURATION 1
PRECIP BEGIN 6 AM
PRECIP END 9 AM
MIXING HGT(M-AGL/MSL) 2310 1400
MIXING HGT(FT-AGL/MSL)7570 4580
TRANSPORT WND (MPH) NW 22 W 21
VENT RATE (KT-FT) 143830 82440
CATEGORY DAY 5 4
INVERSION 33F/6AM 8PM 38F/9AM
DISPERSION 5 4
MAX ADI EARLY 128 VERY GOOD12 POOR 38 FAIR
MAX ADI LATE 150 VERY GOOD3 VERY POOR 104 VERY 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.
WVZ513-202045-
WESTERN TUCKER-
INCLUDING THE CITIES OF PARSONS, HENDRICKS, AND SAINT GEORGE
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SNOW SHOWERS NONE NONE
CHANCE PRECIP (%) 20 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 47 (-3) 27 (-6) 65
RH % (24H TREND) 29 (-9) 72 (-15) 26
WIND 20FT/EARLY(MPH) NW 6 G18 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 8 G18 LGT/VAR SW 5
PRECIP AMOUNT 0.00 0.00 0.00
PRECIP DURATION 0
PRECIP BEGIN 6 AM
PRECIP END 10 AM
MIXING HGT(M-AGL/MSL) 2420 1560
MIXING HGT(FT-AGL/MSL)7940 5110
TRANSPORT WND (MPH) NW 22 W 21
VENT RATE (KT-FT) 150860 91980
CATEGORY DAY 5 4
INVERSION 34F/6AM 9PM 39F/9AM
DISPERSION 5 4
MAX ADI EARLY 135 VERY GOOD11 POOR 36 FAIR
MAX ADI LATE 170 VERY GOOD3 VERY POOR 112 VERY 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.
WVZ514-202045-
EASTERN TUCKER-
INCLUDING THE CITIES OF DAVIS, THOMAS, AND CANAAN VALLEY
123 AM EDT MON APR 20 2026
TODAY TONIGHT TUE
CLOUD COVER PCLDY MCLEAR MCLEAR
PRECIP TYPE SNOW SHOWERS NONE NONE
CHANCE PRECIP (%) 30 0 0
CHANCE OF THUNDER (%) 0 0 0
TEMP (24H TREND) 43 (-2) 24 (-6) 61
RH % (24H TREND) 34 (-6) 72 (-17) 29
WIND 20FT/EARLY(MPH) NW 9 G27 NW 6 G23 LGT/VAR
WIND 20FT/LATE(MPH) NW 10 G26 LGT/VAR SW 7 G20
PRECIP AMOUNT 0.02 0.00 0.00
PRECIP DURATION 1
PRECIP BEGIN 6 AM
PRECIP END 10 AM
MIXING HGT(M-AGL/MSL) 2150 1510
MIXING HGT(FT-AGL/MSL)7060 4940
TRANSPORT WND (MPH) NW 23 W 21
VENT RATE (KT-FT) 141200 88920
CATEGORY DAY 5 4
INVERSION 32F/6AM 8PM 37F/9AM
DISPERSION 5 4
MAX ADI EARLY 98 GOOD 15 GEN POOR 35 FAIR
MAX ADI LATE 130 VERY GOOD3 VERY POOR 107 VERY 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.
FORECAST FOR DAYS 3 THROUGH 7
WEDNESDAY
MOSTLY CLOUDY. SCATTERED SHOWERS. LOWS IN THE LOWER
50S. HIGHS IN THE UPPER 60S. SOUTHWEST WINDS AROUND 5 MPH.
THURSDAY
MOSTLY CLEAR. LOWS IN THE UPPER 40S. HIGHS IN THE MID
70S. LIGHT WINDS.
FRIDAY
PARTLY CLOUDY. LOWS IN THE LOWER 50S. HIGHS IN THE
UPPER 70S. SOUTHWEST WINDS 5 TO 10 MPH.
SATURDAY
MOSTLY CLOUDY WITH SHOWERS LIKELY. LOWS IN THE UPPER
50S. HIGHS AROUND 70. SOUTHWEST WINDS 5 TO 10 MPH.
SUNDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
40S. HIGHS IN THE UPPER 60S. NORTHWEST WINDS 5 TO 10 MPH.
WM
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