105
FNUS51 KPBZ 210500
FWFPBZ
FIRE WEATHER PLANNING FORECAST
NATIONAL WEATHER SERVICE PITTSBURGH PA
100 AM EDT TUE APR 21 2026
DISCUSSION
HIGH PRESSURE WILL MAINTAIN DRY WEATHER TODAY AS IT SHIFTS EAST OF
THE AREA. MINIMUM RH LEVELS ARE EXPECTED TO RANGE FROM 25 TO 30
PERCENT ACROSS MUCH OF THE AREA, THOUGH SOME MOISTURE RETURN IN
SOUTHERLY FLOW SHOULD RESULT IN INCREASING DEW POINTS LATER IN THE
DAY. SHOWERS ARE LIKELY TONIGHT INTO EARLY WEDNESDAY WITH A WEAK
CROSSING COLD FRONT. ISOLATED EMBEDDED THUNDERSTORMS ARE ALSO
POSSIBLE. GENERALLY DRY AND WARM WEATHER RETURNS THURSDAY UNDER
HIGH PRESSURE.
OHZ039-212015-
TUSCARAWAS-
INCLUDING THE CITIES OF NEW PHILADELPHIA AND DOVER
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 40
CHANCE OF THUNDER (%) 0 30 20
TEMP (24H TREND) 69 (+22) 53 (+22) 70
RH % (24H TREND) 27 (-5) 84 (+16) 59
WIND 20FT/EARLY(MPH) S 6 G17 SW 7 G17 W 6
WIND 20FT/LATE(MPH) SW 10 G19 SW 7 W 6
PRECIP AMOUNT 0.00 0.08 0.02
PRECIP DURATION 3 2
PRECIP BEGIN 8 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1610 1390
MIXING HGT(FT-AGL/MSL)5270 4550
TRANSPORT WND (MPH) SW 25 NW 13
VENT RATE (KT-FT) 137770 45590
CATEGORY DAY 5 4
INVERSION 42F/9AM 7PM 57F/9AM
DISPERSION 5 5
MAX ADI EARLY 55 GEN GOOD 33 FAIR 28 FAIR
MAX ADI LATE 119 VERY GOOD14 GEN POOR 66 GOOD
MAX LVORI EARLY 2 2 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ040-212015-
CARROLL-
INCLUDING THE CITIES OF CARROLLTON AND MALVERN
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 50
CHANCE OF THUNDER (%) 0 30 20
TEMP (24H TREND) 67 (+21) 53 (+23) 69
RH % (24H TREND) 27 (-3) 84 (+19) 58
WIND 20FT/EARLY(MPH) S 7 SW 7 W 6
WIND 20FT/LATE(MPH) SW 10 G18 SW 8 W 7
PRECIP AMOUNT 0.00 0.11 0.03
PRECIP DURATION 3 2
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1370 1300
MIXING HGT(FT-AGL/MSL)4500 4280
TRANSPORT WND (MPH) SW 24 NW 12
VENT RATE (KT-FT) 112100 54800
CATEGORY DAY 4 3
INVERSION 41F/9AM 7PM 57F/9AM
DISPERSION 5 5
MAX ADI EARLY 56 GEN GOOD 30 FAIR 31 FAIR
MAX ADI LATE 95 GOOD 14 GEN POOR 61 GOOD
MAX LVORI EARLY 2 2 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ041-212015-
COLUMBIANA-
INCLUDING THE CITIES OF EAST LIVERPOOL, SALEM, AND COLUMBIANA
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY PCLDY
PRECIP TYPE NONE TSTMS SHOWERS
CHANCE PRECIP (%) 0 70 40
CHANCE OF THUNDER (%) 0 20 0
TEMP (24H TREND) 66 (+21) 53 (+24) 69
RH % (24H TREND) 27 (-2) 84 (+20) 54
WIND 20FT/EARLY(MPH) S 6 S 7 W 6
WIND 20FT/LATE(MPH) SW 10 G18 SW 7 NW 7
PRECIP AMOUNT 0.00 0.13 0.03
PRECIP DURATION 3 2
PRECIP BEGIN 8 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1280 1400
MIXING HGT(FT-AGL/MSL)4190 4580
TRANSPORT WND (MPH) SW 23 NW 13
VENT RATE (KT-FT) 108850 56640
CATEGORY DAY 4 4
INVERSION 40F/9AM 7PM 57F/9AM
DISPERSION 5 5
MAX ADI EARLY 58 GEN GOOD 27 FAIR 31 FAIR
MAX ADI LATE 96 GOOD 15 GEN POOR 64 GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ048-212015-
COSHOCTON-
INCLUDING THE CITY OF COSHOCTON
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 40
CHANCE OF THUNDER (%) 0 30 20
TEMP (24H TREND) 70 (+22) 53 (+22) 70
RH % (24H TREND) 29 (-1) 86 (+25) 58
WIND 20FT/EARLY(MPH) S 5 SW 7 G17 W 5
WIND 20FT/LATE(MPH) SW 9 G18 SW 6 W 6
PRECIP AMOUNT 0.00 0.07 0.01
PRECIP DURATION 3 2
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1710 1460
MIXING HGT(FT-AGL/MSL)5620 4780
TRANSPORT WND (MPH) SW 29 NW 10
VENT RATE (KT-FT) 150020 47540
CATEGORY DAY 5 3
INVERSION 42F/9AM 8PM 58F/9AM
DISPERSION 5 5
MAX ADI EARLY 49 GEN GOOD 35 FAIR 35 FAIR
MAX ADI LATE 170 VERY GOOD12 POOR 52 GEN GOOD
MAX LVORI EARLY 2 2 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ049-212015-
HARRISON-
INCLUDING THE CITY OF CADIZ
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 50
CHANCE OF THUNDER (%) 0 30 20
TEMP (24H TREND) 68 (+20) 53 (+23) 70
RH % (24H TREND) 25 (-2) 81 (+12) 57
WIND 20FT/EARLY(MPH) S 6 SW 7 SW 6
WIND 20FT/LATE(MPH) SW 9 G18 SW 8 W 7
PRECIP AMOUNT 0.00 0.08 0.04
PRECIP DURATION 4 2
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1530 1330
MIXING HGT(FT-AGL/MSL)5000 4360
TRANSPORT WND (MPH) SW 24 NW 13
VENT RATE (KT-FT) 120060 48760
CATEGORY DAY 5 3
INVERSION 42F/9AM 7PM 57F/9AM
DISPERSION 5 5
MAX ADI EARLY 57 GEN GOOD 16 GEN POOR 27 FAIR
MAX ADI LATE 118 VERY GOOD14 GEN POOR 53 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ050-212015-
JEFFERSON OH-
INCLUDING THE CITY OF STEUBENVILLE
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 60
CHANCE OF THUNDER (%) 0 30 20
TEMP (24H TREND) 67 (+20) 53 (+23) 69
RH % (24H TREND) 24 (-3) 82 (+20) 56
WIND 20FT/EARLY(MPH) S 5 SW 7 SW 6
WIND 20FT/LATE(MPH) SW 9 G17 SW 7 W 7
PRECIP AMOUNT 0.00 0.08 0.04
PRECIP DURATION 4 3
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1360 1320
MIXING HGT(FT-AGL/MSL)4470 4340
TRANSPORT WND (MPH) SW 22 NW 13
VENT RATE (KT-FT) 111280 61300
CATEGORY DAY 4 3
INVERSION 41F/9AM 7PM 56F/9AM
DISPERSION 5 5
MAX ADI EARLY 57 GEN GOOD 28 FAIR 30 FAIR
MAX ADI LATE 101 VERY GOOD13 GEN POOR 52 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 3 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ057-212015-
MUSKINGUM-
INCLUDING THE CITY OF ZANESVILLE
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 50
CHANCE OF THUNDER (%) 0 30 30
TEMP (24H TREND) 71 (+22) 53 (+21) 71
RH % (24H TREND) 26 (-3) 83 (+16) 56
WIND 20FT/EARLY(MPH) S 5 SW 7 G18 W 5
WIND 20FT/LATE(MPH) SW 9 G18 SW 6 W 6
PRECIP AMOUNT 0.00 0.03 0.03
PRECIP DURATION 4 2
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1800 1410
MIXING HGT(FT-AGL/MSL)5910 4610
TRANSPORT WND (MPH) SW 28 NW 12
VENT RATE (KT-FT) 162370 47930
CATEGORY DAY 5 3
INVERSION 43F/9AM 8PM 58F/9AM
DISPERSION 5 5
MAX ADI EARLY 49 GEN GOOD 34 FAIR 39 FAIR
MAX ADI LATE 171 VERY GOOD12 POOR 57 GEN GOOD
MAX LVORI EARLY 2 2 4
MAX LVORI LATE 1 3 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ058-212015-
GUERNSEY-
INCLUDING THE CITY OF CAMBRIDGE
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 50
CHANCE OF THUNDER (%) 0 30 30
TEMP (24H TREND) 70 (+20) 53 (+22) 71
RH % (24H TREND) 26 (-2) 84 (+19) 57
WIND 20FT/EARLY(MPH) S 5 SW 6 SW 5
WIND 20FT/LATE(MPH) SW 9 G18 SW 6 W 6
PRECIP AMOUNT 0.00 0.06 0.05
PRECIP DURATION 4 2
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1720 1320
MIXING HGT(FT-AGL/MSL)5640 4320
TRANSPORT WND (MPH) SW 25 NW 10
VENT RATE (KT-FT) 148900 51970
CATEGORY DAY 5 3
INVERSION 44F/9AM 7PM 57F/9AM
DISPERSION 5 5
MAX ADI EARLY 55 GEN GOOD 17 GEN POOR 34 FAIR
MAX ADI LATE 158 VERY GOOD11 POOR 48 GEN GOOD
MAX LVORI EARLY 2 2 4
MAX LVORI LATE 1 3 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ059-212015-
BELMONT-
INCLUDING THE CITIES OF MARTINS FERRY AND ST. CLAIRSVILLE
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 70
CHANCE OF THUNDER (%) 0 30 30
TEMP (24H TREND) 69 (+20) 53 (+21) 69
RH % (24H TREND) 24 (-7) 84 (+19) 59
WIND 20FT/EARLY(MPH) S 5 SW 6 SW 7
WIND 20FT/LATE(MPH) SW 9 G18 SW 8 G17 W 7
PRECIP AMOUNT 0.00 0.07 0.06
PRECIP DURATION 4 6
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1550 1250
MIXING HGT(FT-AGL/MSL)5090 4110
TRANSPORT WND (MPH) SW 24 NW 13
VENT RATE (KT-FT) 121070 59120
CATEGORY DAY 5 3
INVERSION 43F/9AM 7PM 56F/9AM
DISPERSION 5 5
MAX ADI EARLY 52 GEN GOOD 15 GEN POOR 33 FAIR
MAX ADI LATE 130 VERY GOOD14 GEN POOR 50 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ068-212015-
NOBLE-
INCLUDING THE CITY OF CALDWELL
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 60
CHANCE OF THUNDER (%) 0 30 30
TEMP (24H TREND) 71 (+21) 52 (+20) 70
RH % (24H TREND) 25 (-3) 84 (+7) 59
WIND 20FT/EARLY(MPH) LGT/VAR SW 6 SW 6
WIND 20FT/LATE(MPH) S 8 G18 SW 6 W 6
PRECIP AMOUNT 0.00 0.03 0.05
PRECIP DURATION 4 6
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1750 1270
MIXING HGT(FT-AGL/MSL)5750 4150
TRANSPORT WND (MPH) SW 25 W 13
VENT RATE (KT-FT) 149550 45360
CATEGORY DAY 5 3
INVERSION 44F/9AM 8PM 57F/9AM
DISPERSION 5 5
MAX ADI EARLY 52 GEN GOOD 32 FAIR 37 FAIR
MAX ADI LATE 158 VERY GOOD10 POOR 48 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 3 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ069-212015-
MONROE-
INCLUDING THE CITY OF WOODSFIELD
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 60
CHANCE OF THUNDER (%) 0 30 30
TEMP (24H TREND) 71 (+21) 53 (+20) 70
RH % (24H TREND) 23 (-7) 83 (+11) 61
WIND 20FT/EARLY(MPH) LGT/VAR SW 5 SW 6
WIND 20FT/LATE(MPH) S 7 G18 SW 5 W 6
PRECIP AMOUNT 0.00 0.03 0.06
PRECIP DURATION 3 6
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1680 1300
MIXING HGT(FT-AGL/MSL)5500 4260
TRANSPORT WND (MPH) SW 24 W 13
VENT RATE (KT-FT) 136030 45460
CATEGORY DAY 5 3
INVERSION 43F/9AM 7PM 56F/9AM
DISPERSION 5 5
MAX ADI EARLY 48 GEN GOOD 31 FAIR 36 FAIR
MAX ADI LATE 147 VERY GOOD10 POOR 50 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 3 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ007-212015-
MERCER-
INCLUDING THE CITIES OF SHARON, HERMITAGE, AND GROVE CITY
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE NONE TSTMS SHOWERS
CHANCE PRECIP (%) 0 70 40
CHANCE OF THUNDER (%) 0 20 0
TEMP (24H TREND) 65 (+23) 50 (+23) 69
RH % (24H TREND) 30 (-9) 89 (+16) 55
WIND 20FT/EARLY(MPH) S 6 S 7 W 5
WIND 20FT/LATE(MPH) S 10 SW 6 NW 7
PRECIP AMOUNT 0.00 0.06 0.01
PRECIP DURATION 5 2
PRECIP BEGIN 8 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1100 1440
MIXING HGT(FT-AGL/MSL)3620 4720
TRANSPORT WND (MPH) SW 23 NW 14
VENT RATE (KT-FT) 96580 59410
CATEGORY DAY 4 4
INVERSION 38F/9AM 7PM 59F/10AM
DISPERSION 5 5
MAX ADI EARLY 60 GEN GOOD 26 FAIR 20 GEN POOR
MAX ADI LATE 80 GOOD 10 POOR 77 GOOD
MAX LVORI EARLY 3 3 5
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ008-212015-
VENANGO-
INCLUDING THE CITIES OF OIL CITY AND FRANKLIN
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE NONE TSTMS SHOWERS
CHANCE PRECIP (%) 0 70 30
CHANCE OF THUNDER (%) 0 20 0
TEMP (24H TREND) 63 (+22) 48 (+22) 69
RH % (24H TREND) 31 (-8) 91 (+16) 54
WIND 20FT/EARLY(MPH) S 5 S 5 LGT/VAR
WIND 20FT/LATE(MPH) S 8 SW 5 NW 6
PRECIP AMOUNT 0.00 0.04 0.01
PRECIP DURATION 3 2
PRECIP BEGIN 8 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1090 1570
MIXING HGT(FT-AGL/MSL)3570 5150
TRANSPORT WND (MPH) SW 22 NW 14
VENT RATE (KT-FT) 88070 75410
CATEGORY DAY 4 4
INVERSION 36F/9AM 7PM 57F/10AM
DISPERSION 5 5
MAX ADI EARLY 55 GEN GOOD 13 GEN POOR 16 GEN POOR
MAX ADI LATE 87 GOOD 9 POOR 79 GOOD
MAX LVORI EARLY 3 3 5
MAX LVORI LATE 1 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ009-212015-
FOREST-
INCLUDING THE CITY OF TIONESTA
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE NONE TSTMS SHOWERS
CHANCE PRECIP (%) 0 60 30
CHANCE OF THUNDER (%) 0 20 0
TEMP (24H TREND) 60 (+21) 46 (+21) 68
RH % (24H TREND) 29 (-8) 91 (+16) 51
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) S 6 LGT/VAR NW 5
PRECIP AMOUNT 0.00 0.02 0.01
PRECIP DURATION 2 2
PRECIP BEGIN 8 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1120 1660
MIXING HGT(FT-AGL/MSL)3660 5440
TRANSPORT WND (MPH) S 17 NW 15
VENT RATE (KT-FT) 70310 76750
CATEGORY DAY 4 4
INVERSION 30F/8AM 7PM 58F/11AM
DISPERSION 5 5
MAX ADI EARLY 53 GEN GOOD 9 POOR 13 GEN POOR
MAX ADI LATE 82 GOOD 9 POOR 93 GOOD
MAX LVORI EARLY 3 3 5
MAX LVORI LATE 1 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ013-212015-
LAWRENCE-
INCLUDING THE CITIES OF NEW CASTLE AND ELLWOOD CITY
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY PCLDY
PRECIP TYPE NONE TSTMS SHOWERS
CHANCE PRECIP (%) 0 70 40
CHANCE OF THUNDER (%) 0 20 0
TEMP (24H TREND) 67 (+23) 51 (+23) 71
RH % (24H TREND) 27 (-7) 87 (+14) 53
WIND 20FT/EARLY(MPH) S 5 S 5 W 5
WIND 20FT/LATE(MPH) S 9 SW 5 NW 6
PRECIP AMOUNT 0.00 0.05 0.01
PRECIP DURATION 3 2
PRECIP BEGIN 8 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1200 1490
MIXING HGT(FT-AGL/MSL)3940 4880
TRANSPORT WND (MPH) SW 22 NW 14
VENT RATE (KT-FT) 102420 64270
CATEGORY DAY 4 4
INVERSION 39F/9AM 7PM 59F/10AM
DISPERSION 5 5
MAX ADI EARLY 60 GEN GOOD 25 FAIR 25 FAIR
MAX ADI LATE 99 GOOD 9 POOR 78 GOOD
MAX LVORI EARLY 3 3 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ014-212015-
BUTLER-
INCLUDING THE CITY OF BUTLER
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY PCLDY
PRECIP TYPE NONE TSTMS SHOWERS
CHANCE PRECIP (%) 0 70 50
CHANCE OF THUNDER (%) 0 20 0
TEMP (24H TREND) 64 (+21) 48 (+21) 69
RH % (24H TREND) 28 (-12) 90 (+16) 60
WIND 20FT/EARLY(MPH) LGT/VAR S 5 SW 5
WIND 20FT/LATE(MPH) S 8 SW 5 W 6
PRECIP AMOUNT 0.00 0.05 0.02
PRECIP DURATION 3 2
PRECIP BEGIN 8 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1220 1450
MIXING HGT(FT-AGL/MSL)4000 4750
TRANSPORT WND (MPH) SW 21 NW 14
VENT RATE (KT-FT) 92570 72110
CATEGORY DAY 4 4
INVERSION 39F/9AM 7PM 58F/10AM
DISPERSION 5 5
MAX ADI EARLY 52 GEN GOOD 25 FAIR 22 FAIR
MAX ADI LATE 96 GOOD 9 POOR 66 GOOD
MAX LVORI EARLY 3 3 5
MAX LVORI LATE 1 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ015-212015-
CLARION-
INCLUDING THE CITY OF CLARION
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE NONE TSTMS SHOWERS
CHANCE PRECIP (%) 0 70 40
CHANCE OF THUNDER (%) 0 20 0
TEMP (24H TREND) 62 (+22) 47 (+21) 69
RH % (24H TREND) 30 (-8) 89 (+15) 54
WIND 20FT/EARLY(MPH) LGT/VAR S 5 LGT/VAR
WIND 20FT/LATE(MPH) S 7 LGT/VAR W 6
PRECIP AMOUNT 0.00 0.03 0.02
PRECIP DURATION 3 2
PRECIP BEGIN 8 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1110 1660
MIXING HGT(FT-AGL/MSL)3660 5440
TRANSPORT WND (MPH) SW 18 NW 15
VENT RATE (KT-FT) 72700 75110
CATEGORY DAY 4 4
INVERSION 36F/9AM 7PM 57F/10AM
DISPERSION 5 5
MAX ADI EARLY 50 GEN GOOD 10 POOR 17 GEN POOR
MAX ADI LATE 84 GOOD 8 POOR 88 GOOD
MAX LVORI EARLY 3 3 5
MAX LVORI LATE 1 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ016-212015-
JEFFERSON PA-
INCLUDING THE CITIES OF PUNXSUTAWNEY AND BROOKVILLE
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY PCLDY
PRECIP TYPE NONE TSTMS SHOWERS
CHANCE PRECIP (%) 0 60 50
CHANCE OF THUNDER (%) 0 20 0
TEMP (24H TREND) 59 (+19) 46 (+20) 67
RH % (24H TREND) 26 (-9) 85 (+15) 53
WIND 20FT/EARLY(MPH) LGT/VAR S 5 SW 5
WIND 20FT/LATE(MPH) SW 7 LGT/VAR W 6
PRECIP AMOUNT 0.00 0.02 0.03
PRECIP DURATION 2 2
PRECIP BEGIN 8 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1200 1700
MIXING HGT(FT-AGL/MSL)3950 5570
TRANSPORT WND (MPH) SW 17 NW 15
VENT RATE (KT-FT) 71350 79130
CATEGORY DAY 4 4
INVERSION 36F/9AM 7PM 57F/11AM
DISPERSION 5 5
MAX ADI EARLY 52 GEN GOOD 9 POOR 18 GEN POOR
MAX ADI LATE 79 GOOD 9 POOR 90 GOOD
MAX LVORI EARLY 3 3 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ020-212015-
BEAVER-
INCLUDING THE CITIES OF ALIQUIPPA, BEAVER FALLS, AMBRIDGE,
AND MONACA
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 50
CHANCE OF THUNDER (%) 0 20 20
TEMP (24H TREND) 66 (+20) 53 (+23) 70
RH % (24H TREND) 25 (-2) 84 (+19) 55
WIND 20FT/EARLY(MPH) LGT/VAR S 5 SW 5
WIND 20FT/LATE(MPH) SW 8 SW 5 W 6
PRECIP AMOUNT 0.00 0.13 0.04
PRECIP DURATION 4 2
PRECIP BEGIN 8 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1320 1360
MIXING HGT(FT-AGL/MSL)4320 4450
TRANSPORT WND (MPH) SW 23 NW 13
VENT RATE (KT-FT) 106190 56050
CATEGORY DAY 4 4
INVERSION 41F/9AM 7PM 57F/9AM
DISPERSION 5 5
MAX ADI EARLY 57 GEN GOOD 26 FAIR 27 FAIR
MAX ADI LATE 112 VERY GOOD10 POOR 59 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ021-212015-
ALLEGHENY-
INCLUDING THE CITY OF PITTSBURGH METRO AREA
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 60
CHANCE OF THUNDER (%) 0 20 20
TEMP (24H TREND) 66 (+21) 53 (+22) 69
RH % (24H TREND) 24 (-9) 85 (+16) 56
WIND 20FT/EARLY(MPH) LGT/VAR S 6 SW 7
WIND 20FT/LATE(MPH) SW 9 SW 6 W 8
PRECIP AMOUNT 0.00 0.10 0.08
PRECIP DURATION 3 6
PRECIP BEGIN 10 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1390 1290
MIXING HGT(FT-AGL/MSL)4560 4230
TRANSPORT WND (MPH) SW 21 NW 13
VENT RATE (KT-FT) 93860 46630
CATEGORY DAY 4 3
INVERSION 41F/9AM 7PM 57F/9AM
DISPERSION 5 5
MAX ADI EARLY 52 GEN GOOD 26 FAIR 31 FAIR
MAX ADI LATE 104 VERY GOOD13 GEN POOR 55 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ022-212015-
ARMSTRONG-
INCLUDING THE CITIES OF KITTANNING AND FORD CITY
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 50
CHANCE OF THUNDER (%) 0 20 20
TEMP (24H TREND) 64 (+21) 49 (+21) 69
RH % (24H TREND) 28 (-10) 89 (+13) 59
WIND 20FT/EARLY(MPH) LGT/VAR S 5 SW 5
WIND 20FT/LATE(MPH) SW 7 LGT/VAR W 6
PRECIP AMOUNT 0.00 0.03 0.04
PRECIP DURATION 2 2
PRECIP BEGIN 9 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1200 1370
MIXING HGT(FT-AGL/MSL)3930 4500
TRANSPORT WND (MPH) SW 17 NW 13
VENT RATE (KT-FT) 78680 74400
CATEGORY DAY 4 4
INVERSION 38F/9AM 7PM 57F/10AM
DISPERSION 5 5
MAX ADI EARLY 52 GEN GOOD 9 POOR 21 FAIR
MAX ADI LATE 81 GOOD 9 POOR 56 GEN GOOD
MAX LVORI EARLY 3 3 5
MAX LVORI LATE 1 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ029-212015-
WASHINGTON-
INCLUDING THE CITIES OF WASHINGTON AND CANONSBURG
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 60
CHANCE OF THUNDER (%) 0 20 20
TEMP (24H TREND) 66 (+20) 52 (+22) 68
RH % (24H TREND) 25 (-6) 83 (+13) 59
WIND 20FT/EARLY(MPH) S 5 SW 6 SW 8
WIND 20FT/LATE(MPH) SW 9 G17 SW 7 W 8
PRECIP AMOUNT 0.00 0.07 0.07
PRECIP DURATION 2 6
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1370 1220
MIXING HGT(FT-AGL/MSL)4480 3990
TRANSPORT WND (MPH) SW 21 NW 14
VENT RATE (KT-FT) 100410 54140
CATEGORY DAY 4 3
INVERSION 41F/9AM 7PM 56F/9AM
DISPERSION 5 5
MAX ADI EARLY 51 GEN GOOD 25 FAIR 32 FAIR
MAX ADI LATE 99 GOOD 13 GEN POOR 55 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 3 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ031-212015-
GREENE-
INCLUDING THE CITY OF WAYNESBURG
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 70
CHANCE OF THUNDER (%) 0 30 30
TEMP (24H TREND) 67 (+20) 52 (+21) 67
RH % (24H TREND) 24 (-10) 81 (+5) 64
WIND 20FT/EARLY(MPH) LGT/VAR SW 5 SW 6
WIND 20FT/LATE(MPH) SW 7 SW 6 W 7
PRECIP AMOUNT 0.00 0.05 0.09
PRECIP DURATION 2 6
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1480 1230
MIXING HGT(FT-AGL/MSL)4840 4050
TRANSPORT WND (MPH) SW 21 W 13
VENT RATE (KT-FT) 110860 35200
CATEGORY DAY 4 3
INVERSION 41F/9AM 7PM 55F/8AM
DISPERSION 5 5
MAX ADI EARLY 50 GEN GOOD 11 POOR 38 FAIR
MAX ADI LATE 114 VERY GOOD12 POOR 49 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 3 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ073-212015-
WESTMORELAND-
INCLUDING THE CITIES OF MURRYSVILLE, GREENSBURG, NEW KENSINGTON,
LOWER BURRELL, LATROBE, AND MONESSEN
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 70
CHANCE OF THUNDER (%) 0 20 20
TEMP (24H TREND) 65 (+20) 50 (+20) 69
RH % (24H TREND) 27 (-9) 86 (+9) 61
WIND 20FT/EARLY(MPH) LGT/VAR S 6 SW 7
WIND 20FT/LATE(MPH) SW 8 SW 6 W 8
PRECIP AMOUNT 0.00 0.06 0.12
PRECIP DURATION 2 6
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1270 1120
MIXING HGT(FT-AGL/MSL)4170 3670
TRANSPORT WND (MPH) SW 18 W 13
VENT RATE (KT-FT) 83710 53830
CATEGORY DAY 4 3
INVERSION 41F/9AM 7PM 56F/9AM
DISPERSION 5 5
MAX ADI EARLY 48 GEN GOOD 21 FAIR 29 FAIR
MAX ADI LATE 88 GOOD 13 GEN POOR 47 GEN GOOD
MAX LVORI EARLY 3 3 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ074-212015-
HIGHER ELEVATIONS OF WESTMORELAND-
INCLUDING THE CITIES OF LIGONIER AND DONEGAL
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 60 70
CHANCE OF THUNDER (%) 0 20 20
TEMP (24H TREND) 64 (+22) 49 (+20) 67
RH % (24H TREND) 23 (-13) 82 (+12) 60
WIND 20FT/EARLY(MPH) LGT/VAR S 5 SW 7 G18
WIND 20FT/LATE(MPH) SW 6 SW 6 G18 W 7 G17
PRECIP AMOUNT 0.00 0.05 0.20
PRECIP DURATION 2 6
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1230 1080
MIXING HGT(FT-AGL/MSL)4040 3540
TRANSPORT WND (MPH) SW 14 W 15
VENT RATE (KT-FT) 69190 44270
CATEGORY DAY 3 3
INVERSION 40F/9AM 7PM 54F/8AM
DISPERSION 5 5
MAX ADI EARLY 43 GEN GOOD 12 POOR 32 FAIR
MAX ADI LATE 76 GOOD 13 GEN POOR 48 GEN GOOD
MAX LVORI EARLY 3 2 3
MAX LVORI LATE 1 3 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ075-212015-
FAYETTE-
INCLUDING THE CITY OF UNIONTOWN
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 60 70
CHANCE OF THUNDER (%) 0 20 20
TEMP (24H TREND) 66 (+20) 52 (+22) 66
RH % (24H TREND) 24 (-12) 82 (+10) 64
WIND 20FT/EARLY(MPH) LGT/VAR S 5 SW 6
WIND 20FT/LATE(MPH) SW 7 SW 6 W 7
PRECIP AMOUNT 0.00 0.07 0.14
PRECIP DURATION 2 6
PRECIP BEGIN 1 AM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1360 1110
MIXING HGT(FT-AGL/MSL)4450 3640
TRANSPORT WND (MPH) SW 17 W 14
VENT RATE (KT-FT) 92230 37760
CATEGORY DAY 4 3
INVERSION 42F/9AM 7PM 55F/8AM
DISPERSION 5 5
MAX ADI EARLY 45 GEN GOOD 11 POOR 37 FAIR
MAX ADI LATE 91 GOOD 10 POOR 46 GEN GOOD
MAX LVORI EARLY 3 3 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ076-212015-
HIGHER ELEVATIONS OF FAYETTE-
INCLUDING THE CITIES OF CHAMPION AND OHIOPYLE
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 60 80
CHANCE OF THUNDER (%) 0 20 20
TEMP (24H TREND) 64 (+22) 50 (+21) 63
RH % (24H TREND) 25 (-14) 82 (+12) 63
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR SW 6
WIND 20FT/LATE(MPH) SW 5 SW 6 W 6
PRECIP AMOUNT 0.00 0.09 0.27
PRECIP DURATION 2 10
PRECIP BEGIN 1 AM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1230 890
MIXING HGT(FT-AGL/MSL)4020 2920
TRANSPORT WND (MPH) SW 18 W 14
VENT RATE (KT-FT) 88650 39510
CATEGORY DAY 4 3
INVERSION 39F/9AM 7PM 53F/8AM
DISPERSION 5 5
MAX ADI EARLY 36 FAIR 11 POOR 33 FAIR
MAX ADI LATE 80 GOOD 12 POOR 41 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 3 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ077-212015-
INDIANA-
INCLUDING THE CITY OF INDIANA
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 60 60
CHANCE OF THUNDER (%) 0 20 20
TEMP (24H TREND) 63 (+21) 49 (+21) 67
RH % (24H TREND) 26 (-15) 86 (+12) 61
WIND 20FT/EARLY(MPH) LGT/VAR S 5 SW 6
WIND 20FT/LATE(MPH) SW 7 SW 5 W 7
PRECIP AMOUNT 0.00 0.04 0.08
PRECIP DURATION 2 6
PRECIP BEGIN 9 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1200 1180
MIXING HGT(FT-AGL/MSL)3930 3860
TRANSPORT WND (MPH) SW 15 NW 14
VENT RATE (KT-FT) 69990 66890
CATEGORY DAY 4 3
INVERSION 39F/9AM 7PM 55F/9AM
DISPERSION 5 5
MAX ADI EARLY 48 GEN GOOD 11 POOR 21 FAIR
MAX ADI LATE 76 GOOD 10 POOR 60 GEN GOOD
MAX LVORI EARLY 3 3 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ078-212015-
HIGHER ELEVATIONS OF INDIANA-
INCLUDING THE CITY OF ARMAGH
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 60 60
CHANCE OF THUNDER (%) 0 20 20
TEMP (24H TREND) 63 (+22) 49 (+21) 67
RH % (24H TREND) 24 (-16) 81 (+12) 61
WIND 20FT/EARLY(MPH) LGT/VAR S 5 SW 7
WIND 20FT/LATE(MPH) SW 6 SW 6 W 7
PRECIP AMOUNT 0.00 0.04 0.13
PRECIP DURATION 2 6
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1210 1040
MIXING HGT(FT-AGL/MSL)3960 3410
TRANSPORT WND (MPH) SW 14 W 15
VENT RATE (KT-FT) 63300 39560
CATEGORY DAY 3 3
INVERSION 39F/9AM 7PM 54F/9AM
DISPERSION 5 5
MAX ADI EARLY 44 GEN GOOD 12 POOR 24 FAIR
MAX ADI LATE 71 GOOD 11 POOR 51 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ001-212015-
HANCOCK-
INCLUDING THE CITY OF WEIRTON
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY PCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 50
CHANCE OF THUNDER (%) 0 20 20
TEMP (24H TREND) 67 (+21) 54 (+24) 69
RH % (24H TREND) 25 (-5) 81 (+16) 55
WIND 20FT/EARLY(MPH) S 5 S 6 SW 6
WIND 20FT/LATE(MPH) S 9 G17 SW 6 W 6
PRECIP AMOUNT 0.00 0.11 0.04
PRECIP DURATION 4 2
PRECIP BEGIN 10 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1380 1350
MIXING HGT(FT-AGL/MSL)4520 4420
TRANSPORT WND (MPH) SW 23 NW 13
VENT RATE (KT-FT) 110130 43350
CATEGORY DAY 4 4
INVERSION 41F/9AM 7PM 57F/9AM
DISPERSION 5 5
MAX ADI EARLY 55 GEN GOOD 26 FAIR 33 FAIR
MAX ADI LATE 115 VERY GOOD12 POOR 54 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 3 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ002-212015-
BROOKE-
INCLUDING THE CITIES OF FOLLANSBEE AND WELLSBURG
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 70
CHANCE OF THUNDER (%) 0 30 20
TEMP (24H TREND) 67 (+20) 54 (+23) 69
RH % (24H TREND) 24 (-5) 81 (+20) 55
WIND 20FT/EARLY(MPH) S 5 SW 6 SW 6
WIND 20FT/LATE(MPH) SW 9 G17 SW 7 W 7
PRECIP AMOUNT 0.00 0.06 0.05
PRECIP DURATION 4 6
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1380 1360
MIXING HGT(FT-AGL/MSL)4530 4480
TRANSPORT WND (MPH) SW 21 NW 13
VENT RATE (KT-FT) 109140 51380
CATEGORY DAY 4 4
INVERSION 42F/9AM 7PM 57F/9AM
DISPERSION 5 5
MAX ADI EARLY 54 GEN GOOD 28 FAIR 32 FAIR
MAX ADI LATE 106 VERY GOOD13 GEN POOR 55 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 3 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ003-212015-
OHIO-
INCLUDING THE CITY OF WHEELING
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR MCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 70 70
CHANCE OF THUNDER (%) 0 30 20
TEMP (24H TREND) 68 (+20) 53 (+22) 68
RH % (24H TREND) 25 (-2) 83 (+19) 58
WIND 20FT/EARLY(MPH) S 5 SW 7 SW 8
WIND 20FT/LATE(MPH) SW 9 G17 SW 8 W 7
PRECIP AMOUNT 0.00 0.05 0.05
PRECIP DURATION 4 6
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1450 1270
MIXING HGT(FT-AGL/MSL)4750 4160
TRANSPORT WND (MPH) SW 22 W 13
VENT RATE (KT-FT) 110770 54500
CATEGORY DAY 4 3
INVERSION 42F/9AM 7PM 56F/9AM
DISPERSION 5 5
MAX ADI EARLY 48 GEN GOOD 29 FAIR 33 FAIR
MAX ADI LATE 117 VERY GOOD13 GEN POOR 52 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 3 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ004-212015-
MARSHALL-
INCLUDING THE CITY OF MOUNDSVILLE
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 60 70
CHANCE OF THUNDER (%) 0 30 30
TEMP (24H TREND) 69 (+21) 54 (+21) 69
RH % (24H TREND) 25 (-7) 83 (+18) 62
WIND 20FT/EARLY(MPH) LGT/VAR SW 6 SW 6
WIND 20FT/LATE(MPH) SW 8 SW 6 W 6
PRECIP AMOUNT 0.00 0.05 0.07
PRECIP DURATION 3 6
PRECIP BEGIN 11 PM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1560 1220
MIXING HGT(FT-AGL/MSL)5100 3990
TRANSPORT WND (MPH) SW 22 W 13
VENT RATE (KT-FT) 126960 48200
CATEGORY DAY 4 3
INVERSION 43F/9AM 7PM 56F/8AM
DISPERSION 5 5
MAX ADI EARLY 48 GEN GOOD 30 FAIR 34 FAIR
MAX ADI LATE 124 VERY GOOD13 GEN POOR 48 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 3 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ012-212015-
WETZEL-
INCLUDING THE CITY OF NEW MARTINSVILLE
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 60 70
CHANCE OF THUNDER (%) 0 30 30
TEMP (24H TREND) 69 (+21) 53 (+20) 68
RH % (24H TREND) 24 (-9) 84 (+17) 62
WIND 20FT/EARLY(MPH) LGT/VAR SW 5 SW 6
WIND 20FT/LATE(MPH) SW 6 SW 6 W 6
PRECIP AMOUNT 0.00 0.05 0.09
PRECIP DURATION 2 6
PRECIP BEGIN 12 AM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1620 1150
MIXING HGT(FT-AGL/MSL)5320 3780
TRANSPORT WND (MPH) SW 22 W 12
VENT RATE (KT-FT) 127450 32240
CATEGORY DAY 5 3
INVERSION 42F/9AM 7PM 55F/8AM
DISPERSION 5 5
MAX ADI EARLY 49 GEN GOOD 19 GEN POOR 36 FAIR
MAX ADI LATE 129 VERY GOOD11 POOR 43 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 3 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ021-212015-
MARION-
INCLUDING THE CITY OF FAIRMONT
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 60 80
CHANCE OF THUNDER (%) 0 20 30
TEMP (24H TREND) 68 (+19) 52 (+20) 65
RH % (24H TREND) 24 (-10) 83 (+8) 65
WIND 20FT/EARLY(MPH) LGT/VAR SW 5 SW 6
WIND 20FT/LATE(MPH) SW 6 SW 5 W 7
PRECIP AMOUNT 0.00 0.04 0.11
PRECIP DURATION 1 10
PRECIP BEGIN 1 AM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1620 1150
MIXING HGT(FT-AGL/MSL)5320 3770
TRANSPORT WND (MPH) SW 21 W 12
VENT RATE (KT-FT) 115710 34630
CATEGORY DAY 4 3
INVERSION 41F/9AM 7PM 54F/8AM
DISPERSION 5 5
MAX ADI EARLY 47 GEN GOOD 10 POOR 41 GEN GOOD
MAX ADI LATE 123 VERY GOOD9 POOR 43 GEN GOOD
MAX LVORI EARLY 3 3 4
MAX LVORI LATE 1 3 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ509-212015-
MONONGALIA-
INCLUDING THE CITY OF MORGANTOWN
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 60 80
CHANCE OF THUNDER (%) 0 20 20
TEMP (24H TREND) 67 (+20) 52 (+20) 66
RH % (24H TREND) 24 (-12) 81 (+11) 64
WIND 20FT/EARLY(MPH) LGT/VAR SW 5 SW 6
WIND 20FT/LATE(MPH) SW 6 SW 6 W 6
PRECIP AMOUNT 0.00 0.04 0.11
PRECIP DURATION 2 10
PRECIP BEGIN 1 AM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1540 1220
MIXING HGT(FT-AGL/MSL)5070 4000
TRANSPORT WND (MPH) SW 21 W 13
VENT RATE (KT-FT) 109660 32730
CATEGORY DAY 4 3
INVERSION 42F/9AM 7PM 55F/8AM
DISPERSION 5 5
MAX ADI EARLY 47 GEN GOOD 10 POOR 39 FAIR
MAX ADI LATE 119 VERY GOOD9 POOR 44 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 3 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ510-212015-
RIDGES OF EASTERN MONONGALIA AND NORTHWESTERN PRESTON-
INCLUDING THE CITY OF COOPERS ROCK
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 50 80
CHANCE OF THUNDER (%) 0 20 20
TEMP (24H TREND) 64 (+21) 50 (+20) 62
RH % (24H TREND) 24 (-14) 82 (+14) 65
WIND 20FT/EARLY(MPH) LGT/VAR SW 5 SW 6
WIND 20FT/LATE(MPH) SW 6 SW 6 W 6
PRECIP AMOUNT 0.00 0.06 0.26
PRECIP DURATION 1 10
PRECIP BEGIN 2 AM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1300 860
MIXING HGT(FT-AGL/MSL)4260 2840
TRANSPORT WND (MPH) SW 20 W 13
VENT RATE (KT-FT) 91090 27200
CATEGORY DAY 4 3
INVERSION 40F/9AM 7PM 53F/9AM
DISPERSION 5 5
MAX ADI EARLY 35 FAIR 11 POOR 32 FAIR
MAX ADI LATE 93 GOOD 13 GEN POOR 40 FAIR
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 3 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ511-212015-
PRESTON-
INCLUDING THE CITIES OF KINGWOOD AND BRUCETON MILLS
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 50 80
CHANCE OF THUNDER (%) 0 20 20
TEMP (24H TREND) 66 (+21) 50 (+20) 64
RH % (24H TREND) 24 (-12) 81 (+7) 65
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR SW 6
WIND 20FT/LATE(MPH) SW 5 LGT/VAR W 6
PRECIP AMOUNT 0.00 0.06 0.19
PRECIP DURATION 1 10
PRECIP BEGIN 2 AM CONTINUING
PRECIP END CONTINUING 6 PM
MIXING HGT(M-AGL/MSL) 1420 930
MIXING HGT(FT-AGL/MSL)4670 3050
TRANSPORT WND (MPH) SW 18 W 14
VENT RATE (KT-FT) 99160 33380
CATEGORY DAY 4 3
INVERSION 40F/9AM 7PM 53F/8AM
DISPERSION 5 5
MAX ADI EARLY 38 FAIR 11 POOR 45 GEN GOOD
MAX ADI LATE 100 GOOD 11 POOR 43 GEN GOOD
MAX LVORI EARLY 3 3 3
MAX LVORI LATE 1 3 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ512-212015-
EASTERN PRESTON-
INCLUDING THE CITIES OF TERRA ALTA, ROWLESBURG, AND HAZELTON
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY MCLDY
PRECIP TYPE NONE TSTMS TSTMS
CHANCE PRECIP (%) 0 50 80
CHANCE OF THUNDER (%) 0 20 20
TEMP (24H TREND) 63 (+20) 49 (+19) 61
RH % (24H TREND) 24 (-15) 83 (+12) 65
WIND 20FT/EARLY(MPH) LGT/VAR SW 5 SW 8 G19
WIND 20FT/LATE(MPH) SW 6 SW 7 G18 W 7 G19
PRECIP AMOUNT 0.00 0.06 0.23
PRECIP DURATION 1 10
PRECIP BEGIN 2 AM CONTINUING
PRECIP END CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 1320 780
MIXING HGT(FT-AGL/MSL)4340 2550
TRANSPORT WND (MPH) W 18 W 15
VENT RATE (KT-FT) 97550 33360
CATEGORY DAY 4 3
INVERSION 39F/9AM 7PM 52F/8AM
DISPERSION 5 5
MAX ADI EARLY 32 FAIR 12 POOR 45 GEN GOOD
MAX ADI LATE 86 GOOD 16 GEN POOR 42 GEN GOOD
MAX LVORI EARLY 3 3 4
MAX LVORI LATE 1 3 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ513-212015-
WESTERN TUCKER-
INCLUDING THE CITIES OF PARSONS, HENDRICKS, AND SAINT GEORGE
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY MCLDY
PRECIP TYPE NONE SHOWERS TSTMS
CHANCE PRECIP (%) 0 50 80
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 66 (+21) 49 (+18) 62
RH % (24H TREND) 20 (-15) 80 (+10) 64
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR SW 7 G19
WIND 20FT/LATE(MPH) W 5 SW 6 G18 W 7 G19
PRECIP AMOUNT 0.00 0.07 0.27
PRECIP DURATION 1 9
PRECIP BEGIN 3 AM CONTINUING
PRECIP END CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 1490 790
MIXING HGT(FT-AGL/MSL)4900 2600
TRANSPORT WND (MPH) W 18 W 16
VENT RATE (KT-FT) 93400 29500
CATEGORY DAY 4 3
INVERSION 39F/9AM 7PM 52F/8AM
DISPERSION 5 5
MAX ADI EARLY 33 FAIR 13 GEN POOR 53 GEN GOOD
MAX ADI LATE 99 GOOD 14 GEN POOR 49 GEN GOOD
MAX LVORI EARLY 3 3 3
MAX LVORI LATE 1 3 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ514-212015-
EASTERN TUCKER-
INCLUDING THE CITIES OF DAVIS, THOMAS, AND CANAAN VALLEY
100 AM EDT TUE APR 21 2026
TODAY TONIGHT WED
CLOUD COVER MCLEAR PCLDY MCLDY
PRECIP TYPE NONE SHOWERS TSTMS
CHANCE PRECIP (%) 0 40 80
CHANCE OF THUNDER (%) 0 0 20
TEMP (24H TREND) 62 (+22) 46 (+19) 59
RH % (24H TREND) 22 (-15) 81 (+10) 64
WIND 20FT/EARLY(MPH) LGT/VAR SW 6 G20 W 10 G28
WIND 20FT/LATE(MPH) W 6 G18 W 9 G26 W 9 G28
PRECIP AMOUNT 0.00 0.07 0.32
PRECIP DURATION 1 9
PRECIP BEGIN 3 AM CONTINUING
PRECIP END CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 1400 710
MIXING HGT(FT-AGL/MSL)4610 2340
TRANSPORT WND (MPH) W 18 W 20
VENT RATE (KT-FT) 99640 32240
CATEGORY DAY 4 3
INVERSION 38F/9AM 7PM 51F/9AM
DISPERSION 5 5
MAX ADI EARLY 32 FAIR 13 GEN POOR 48 GEN GOOD
MAX ADI LATE 90 GOOD 23 FAIR 45 GEN GOOD
MAX LVORI EARLY 3 2 4
MAX LVORI LATE 1 3 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
FORECAST FOR DAYS 3 THROUGH 7
THURSDAY
PARTLY CLOUDY. LOWS IN THE UPPER 40S. HIGHS IN THE
MID 70S. SOUTHEAST WINDS AROUND 5 MPH.
FRIDAY
PARTLY CLOUDY. LOWS IN THE LOWER 50S. HIGHS IN THE
UPPER 70S. LIGHT WINDS.
SATURDAY
MOSTLY CLOUDY WITH SHOWERS LIKELY. LOWS IN THE MID
50S. HIGHS IN THE LOWER 70S. WEST WINDS 5 TO 10 MPH.
SUNDAY
MOSTLY CLOUDY. A CHANCE OF SHOWERS. LOWS IN THE UPPER
40S. HIGHS AROUND 70. NORTHEAST WINDS 5 TO 10 MPH.
MONDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS AROUND 50.
HIGHS IN THE UPPER 60S. SOUTHEAST WINDS 5 TO 10 MPH.
WM
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