201
FNUS51 KPBZ 200629
FWFPBZ
FIRE WEATHER PLANNING FORECAST
NATIONAL WEATHER SERVICE PITTSBURGH PA
229 AM EDT WED MAY 20 2026
DISCUSSION
A CROSSING COLD FRONT WILL BRING SHOWERS AND THUNDERSTORMS ACROSS
THE REGION TODAY, ALONG WITH COOLER TEMPERATURES AND RELATIVE
HUMIDITY STAYING MOSTLY ABOVE 60 PERCENT. RH VALUES COULD LOCALLY
DIP BELOW 40 PERCENT THURSDAY NORTH AND WEST OF PITTSBURGH. FIRE
WEATHER CONCERNS REMAIN LOW OVERALL, ESPECIALLY DURING THE
MEMORIAL DAY WEEKEND, WITH A COUPLE PERIODS OF SOAKING RAINFALL
LIKELY.
OHZ039-202015-
TUSCARAWAS-
INCLUDING THE CITIES OF NEW PHILADELPHIA AND DOVER
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY MCLEAR
PRECIP TYPE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 80 30 0
CHANCE OF THUNDER (%) 30 0 0
TEMP (24H TREND) 70 (-18) 45 (-20) 71
RH % (24H TREND) 61 (+17) 79 (-20) 42
WIND 20FT/EARLY(MPH) NW 5 N 7 NE 7
WIND 20FT/LATE(MPH) N 8 NE 6 NE 8
PRECIP AMOUNT 0.10 0.01 0.00
PRECIP DURATION 5 1
PRECIP BEGIN 6 AM CONTINUING
PRECIP END CONTINUING 5 AM
MIXING HGT(M-AGL/MSL) 590 1350
MIXING HGT(FT-AGL/MSL)1920 4440
TRANSPORT WND (MPH) N 16 E 15
VENT RATE (KT-FT) 26880 57720
CATEGORY DAY 3 4
INVERSION 67F/7AM 10PM 49F/8AM
DISPERSION 3 4
MAX ADI EARLY 22 FAIR 19 GEN POOR 53 GEN GOOD
MAX ADI LATE 39 FAIR 11 POOR 74 GOOD
MAX LVORI EARLY 6 3 4
MAX LVORI LATE 4 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ040-202015-
CARROLL-
INCLUDING THE CITIES OF CARROLLTON AND MALVERN
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY MCLEAR
PRECIP TYPE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 70 20 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 68 (-19) 45 (-20) 70
RH % (24H TREND) 59 (+14) 78 (-22) 42
WIND 20FT/EARLY(MPH) NW 6 N 8 NE 8
WIND 20FT/LATE(MPH) N 9 N 7 NE 8
PRECIP AMOUNT 0.11 0.00 0.00
PRECIP DURATION 5 0
PRECIP BEGIN 6 AM 8 PM
PRECIP END 6 PM 12 AM
MIXING HGT(M-AGL/MSL) 570 1350
MIXING HGT(FT-AGL/MSL)1880 4440
TRANSPORT WND (MPH) N 16 E 15
VENT RATE (KT-FT) 26320 57720
CATEGORY DAY 2 4
INVERSION 67F/7AM 10PM 49F/8AM
DISPERSION 2 4
MAX ADI EARLY 22 FAIR 18 GEN POOR 50 GEN GOOD
MAX ADI LATE 38 FAIR 11 POOR 75 GOOD
MAX LVORI EARLY 5 3 4
MAX LVORI LATE 4 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ041-202015-
COLUMBIANA-
INCLUDING THE CITIES OF EAST LIVERPOOL, SALEM, AND COLUMBIANA
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY MCLEAR
PRECIP TYPE TSTMS NONE NONE
CHANCE PRECIP (%) 60 0 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 68 (-19) 44 (-20) 70
RH % (24H TREND) 60 (+15) 79 (-18) 41
WIND 20FT/EARLY(MPH) NW 5 N 7 NE 7
WIND 20FT/LATE(MPH) N 9 N 5 NE 8
PRECIP AMOUNT 0.11 0.00 0.00
PRECIP DURATION 4
PRECIP BEGIN 6 AM
PRECIP END 6 PM
MIXING HGT(M-AGL/MSL) 590 1410
MIXING HGT(FT-AGL/MSL)1950 4620
TRANSPORT WND (MPH) N 17 E 15
VENT RATE (KT-FT) 29250 60060
CATEGORY DAY 3 4
INVERSION 68F/8AM 9PM 49F/8AM
DISPERSION 3 4
MAX ADI EARLY 23 FAIR 18 GEN POOR 50 GEN GOOD
MAX ADI LATE 40 FAIR 8 POOR 74 GOOD
MAX LVORI EARLY 5 3 4
MAX LVORI LATE 3 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ048-202015-
COSHOCTON-
INCLUDING THE CITY OF COSHOCTON
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY MCLEAR
PRECIP TYPE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 80 30 0
CHANCE OF THUNDER (%) 30 0 0
TEMP (24H TREND) 70 (-18) 44 (-21) 70
RH % (24H TREND) 63 (+19) 78 (-20) 42
WIND 20FT/EARLY(MPH) LGT/VAR N 7 NE 7
WIND 20FT/LATE(MPH) N 7 NE 6 NE 8
PRECIP AMOUNT 0.08 0.00 0.00
PRECIP DURATION 7 1
PRECIP BEGIN 6 AM CONTINUING
PRECIP END CONTINUING 4 AM
MIXING HGT(M-AGL/MSL) 580 1320
MIXING HGT(FT-AGL/MSL)1910 4320
TRANSPORT WND (MPH) N 17 NE 15
VENT RATE (KT-FT) 28650 56160
CATEGORY DAY 3 4
INVERSION 68F/8AM 10PM 48F/8AM
DISPERSION 3 4
MAX ADI EARLY 22 FAIR 20 GEN POOR 53 GEN GOOD
MAX ADI LATE 41 GEN GOOD 9 POOR 75 GOOD
MAX LVORI EARLY 6 3 4
MAX LVORI LATE 4 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ049-202015-
HARRISON-
INCLUDING THE CITY OF CADIZ
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 80 40 0
CHANCE OF THUNDER (%) 30 0 0
TEMP (24H TREND) 71 (-17) 45 (-20) 70
RH % (24H TREND) 62 (+20) 82 (-18) 41
WIND 20FT/EARLY(MPH) LGT/VAR N 7 NE 8
WIND 20FT/LATE(MPH) N 8 N 6 NE 8
PRECIP AMOUNT 0.11 0.01 0.00
PRECIP DURATION 6 2
PRECIP BEGIN 6 AM CONTINUING
PRECIP END CONTINUING 6 AM
MIXING HGT(M-AGL/MSL) 540 1410
MIXING HGT(FT-AGL/MSL)1790 4620
TRANSPORT WND (MPH) NW 9 E 14
VENT RATE (KT-FT) 14320 55440
CATEGORY DAY 2 4
INVERSION 69F/8AM 12AM 49F/8AM
DISPERSION 2 4
MAX ADI EARLY 20 GEN POOR 19 GEN POOR 49 GEN GOOD
MAX ADI LATE 34 FAIR 12 POOR 74 GOOD
MAX LVORI EARLY 6 3 4
MAX LVORI LATE 3 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ050-202015-
JEFFERSON OH-
INCLUDING THE CITY OF STEUBENVILLE
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 80 40 0
CHANCE OF THUNDER (%) 30 0 0
TEMP (24H TREND) 72 (-16) 46 (-19) 70
RH % (24H TREND) 61 (+20) 80 (-19) 42
WIND 20FT/EARLY(MPH) W 5 N 8 NE 7
WIND 20FT/LATE(MPH) N 8 N 6 NE 8
PRECIP AMOUNT 0.12 0.01 0.00
PRECIP DURATION 5 2
PRECIP BEGIN 6 AM CONTINUING
PRECIP END CONTINUING 6 AM
MIXING HGT(M-AGL/MSL) 560 1420
MIXING HGT(FT-AGL/MSL)1840 4670
TRANSPORT WND (MPH) NW 9 E 14
VENT RATE (KT-FT) 14720 56040
CATEGORY DAY 2 4
INVERSION 69F/8AM 1AM 50F/8AM
DISPERSION 2 4
MAX ADI EARLY 21 FAIR 18 GEN POOR 49 GEN GOOD
MAX ADI LATE 36 FAIR 11 POOR 75 GOOD
MAX LVORI EARLY 5 3 4
MAX LVORI LATE 3 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ057-202015-
MUSKINGUM-
INCLUDING THE CITY OF ZANESVILLE
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 90 40 0
CHANCE OF THUNDER (%) 30 0 0
TEMP (24H TREND) 72 (-17) 45 (-20) 72
RH % (24H TREND) 65 (+20) 78 (-20) 40
WIND 20FT/EARLY(MPH) LGT/VAR N 7 NE 6
WIND 20FT/LATE(MPH) N 7 NE 5 NE 7
PRECIP AMOUNT 0.10 0.02 0.00
PRECIP DURATION 8 2
PRECIP BEGIN 6 AM CONTINUING
PRECIP END CONTINUING 6 AM
MIXING HGT(M-AGL/MSL) 620 1360
MIXING HGT(FT-AGL/MSL)2040 4470
TRANSPORT WND (MPH) NW 9 NE 14
VENT RATE (KT-FT) 16320 53640
CATEGORY DAY 2 4
INVERSION 69F/8AM 1AM 47F/7AM
DISPERSION 2 4
MAX ADI EARLY 17 GEN POOR 20 GEN POOR 48 GEN GOOD
MAX ADI LATE 38 FAIR 9 POOR 74 GOOD
MAX LVORI EARLY 6 3 3
MAX LVORI LATE 3 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ058-202015-
GUERNSEY-
INCLUDING THE CITY OF CAMBRIDGE
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 90 50 0
CHANCE OF THUNDER (%) 30 0 0
TEMP (24H TREND) 72 (-16) 46 (-19) 72
RH % (24H TREND) 64 (+21) 81 (-19) 41
WIND 20FT/EARLY(MPH) LGT/VAR NE 7 NE 6
WIND 20FT/LATE(MPH) N 7 NE 5 NE 6
PRECIP AMOUNT 0.12 0.02 0.00
PRECIP DURATION 7 2
PRECIP BEGIN 6 AM CONTINUING
PRECIP END CONTINUING 6 AM
MIXING HGT(M-AGL/MSL) 590 1380
MIXING HGT(FT-AGL/MSL)1930 4520
TRANSPORT WND (MPH) NW 8 E 14
VENT RATE (KT-FT) 13510 54240
CATEGORY DAY 2 4
INVERSION 69F/8AM 2AM 50F/8AM
DISPERSION 2 4
MAX ADI EARLY 18 GEN POOR 19 GEN POOR 47 GEN GOOD
MAX ADI LATE 35 FAIR 9 POOR 72 GOOD
MAX LVORI EARLY 6 3 4
MAX LVORI LATE 3 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ059-202015-
BELMONT-
INCLUDING THE CITIES OF MARTINS FERRY AND ST. CLAIRSVILLE
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 90 60 30
CHANCE OF THUNDER (%) 40 0 0
TEMP (24H TREND) 74 (-14) 46 (-19) 70
RH % (24H TREND) 69 (+24) 86 (-13) 46
WIND 20FT/EARLY(MPH) LGT/VAR N 8 NE 8
WIND 20FT/LATE(MPH) N 8 NE 7 NE 8
PRECIP AMOUNT 0.24 0.03 0.00
PRECIP DURATION 7 3 1
PRECIP BEGIN 6 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING 11 AM
MIXING HGT(M-AGL/MSL) 630 1200
MIXING HGT(FT-AGL/MSL)2070 3940
TRANSPORT WND (MPH) NW 9 E 15
VENT RATE (KT-FT) 16560 51220
CATEGORY DAY 2 4
INVERSION 69F/8AM 2AM 50F/8AM
DISPERSION 2 4
MAX ADI EARLY 22 FAIR 18 GEN POOR 47 GEN GOOD
MAX ADI LATE 35 FAIR 14 GEN POOR 68 GOOD
MAX LVORI EARLY 6 4 4
MAX LVORI LATE 3 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ068-202015-
NOBLE-
INCLUDING THE CITY OF CALDWELL
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 90 70 20
CHANCE OF THUNDER (%) 40 20 0
TEMP (24H TREND) 74 (-15) 46 (-18) 72
RH % (24H TREND) 71 (+26) 88 (-11) 46
WIND 20FT/EARLY(MPH) LGT/VAR N 7 NE 6
WIND 20FT/LATE(MPH) N 7 NE 6 NE 6
PRECIP AMOUNT 0.25 0.08 0.00
PRECIP DURATION 9 3 1
PRECIP BEGIN 6 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING 12 PM
MIXING HGT(M-AGL/MSL) 660 1190
MIXING HGT(FT-AGL/MSL)2170 3920
TRANSPORT WND (MPH) NW 9 E 14
VENT RATE (KT-FT) 17360 47040
CATEGORY DAY 2 3
INVERSION 70F/9AM 3AM 50F/8AM
DISPERSION 2 3
MAX ADI EARLY 19 GEN POOR 18 GEN POOR 42 GEN GOOD
MAX ADI LATE 34 FAIR 9 POOR 64 GOOD
MAX LVORI EARLY 6 4 4
MAX LVORI LATE 3 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
OHZ069-202015-
MONROE-
INCLUDING THE CITY OF WOODSFIELD
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 80 70 40
CHANCE OF THUNDER (%) 50 20 0
TEMP (24H TREND) 76 (-13) 47 (-17) 71
RH % (24H TREND) 74 (+27) 88 (-10) 51
WIND 20FT/EARLY(MPH) LGT/VAR N 7 G17 NE 6
WIND 20FT/LATE(MPH) NW 6 NE 6 NE 6
PRECIP AMOUNT 0.36 0.14 0.01
PRECIP DURATION 8 6 1
PRECIP BEGIN 6 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING 2 PM
MIXING HGT(M-AGL/MSL) 680 1090
MIXING HGT(FT-AGL/MSL)2230 3590
TRANSPORT WND (MPH) W 9 E 14
VENT RATE (KT-FT) 17840 43080
CATEGORY DAY 2 3
INVERSION 71F/9AM 3AM 51F/8AM
DISPERSION 2 3
MAX ADI EARLY 26 FAIR 18 GEN POOR 36 FAIR
MAX ADI LATE 34 FAIR 10 POOR 62 GOOD
MAX LVORI EARLY 5 4 5
MAX LVORI LATE 3 4 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ007-202015-
MERCER-
INCLUDING THE CITIES OF SHARON, HERMITAGE, AND GROVE CITY
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY MCLEAR
PRECIP TYPE TSTMS NONE NONE
CHANCE PRECIP (%) 50 0 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 66 (-18) 43 (-20) 69
RH % (24H TREND) 61 (+8) 82 (-16) 41
WIND 20FT/EARLY(MPH) NW 7 N 6 NE 6
WIND 20FT/LATE(MPH) N 9 N 5 NE 8
PRECIP AMOUNT 0.04 0.00 0.00
PRECIP DURATION 2
PRECIP BEGIN 6 AM
PRECIP END 5 PM
MIXING HGT(M-AGL/MSL) 630 1520
MIXING HGT(FT-AGL/MSL)2080 5000
TRANSPORT WND (MPH) N 16 NE 14
VENT RATE (KT-FT) 29120 60000
CATEGORY DAY 3 4
INVERSION 65F/7AM 8PM 48F/8AM
DISPERSION 3 4
MAX ADI EARLY 26 FAIR 17 GEN POOR 52 GEN GOOD
MAX ADI LATE 40 FAIR 8 POOR 76 GOOD
MAX LVORI EARLY 6 3 4
MAX LVORI LATE 3 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ008-202015-
VENANGO-
INCLUDING THE CITIES OF OIL CITY AND FRANKLIN
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY MCLEAR
PRECIP TYPE TSTMS NONE NONE
CHANCE PRECIP (%) 60 0 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 67 (-17) 43 (-20) 70
RH % (24H TREND) 61 (+9) 80 (-14) 37
WIND 20FT/EARLY(MPH) NW 5 N 5 NE 5
WIND 20FT/LATE(MPH) N 6 LGT/VAR NE 5
PRECIP AMOUNT 0.03 0.00 0.00
PRECIP DURATION 2
PRECIP BEGIN 6 AM
PRECIP END 5 PM
MIXING HGT(M-AGL/MSL) 640 1650
MIXING HGT(FT-AGL/MSL)2110 5400
TRANSPORT WND (MPH) N 15 NE 13
VENT RATE (KT-FT) 27430 59400
CATEGORY DAY 3 4
INVERSION 65F/7AM 8PM 45F/7AM
DISPERSION 3 4
MAX ADI EARLY 24 FAIR 9 POOR 52 GEN GOOD
MAX ADI LATE 36 FAIR 8 POOR 83 GOOD
MAX LVORI EARLY 6 3 4
MAX LVORI LATE 3 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ009-202015-
FOREST-
INCLUDING THE CITY OF TIONESTA
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS NONE NONE
CHANCE PRECIP (%) 60 0 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 67 (-16) 43 (-21) 69
RH % (24H TREND) 56 (+2) 78 (-12) 33
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) N 5 LGT/VAR LGT/VAR
PRECIP AMOUNT 0.02 0.00 0.00
PRECIP DURATION 2
PRECIP BEGIN 6 AM
PRECIP END 4 PM
MIXING HGT(M-AGL/MSL) 650 1710
MIXING HGT(FT-AGL/MSL)2120 5600
TRANSPORT WND (MPH) N 14 E 13
VENT RATE (KT-FT) 25440 61600
CATEGORY DAY 2 4
INVERSION 66F/7AM 8PM 45F/7AM
DISPERSION 2 4
MAX ADI EARLY 24 FAIR 9 POOR 54 GEN GOOD
MAX ADI LATE 35 FAIR 8 POOR 87 GOOD
MAX LVORI EARLY 5 3 4
MAX LVORI LATE 3 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ013-202015-
LAWRENCE-
INCLUDING THE CITIES OF NEW CASTLE AND ELLWOOD CITY
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY MCLEAR
PRECIP TYPE TSTMS NONE NONE
CHANCE PRECIP (%) 60 0 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 68 (-18) 44 (-21) 71
RH % (24H TREND) 61 (+14) 81 (-17) 40
WIND 20FT/EARLY(MPH) NW 5 N 6 NE 5
WIND 20FT/LATE(MPH) N 8 LGT/VAR NE 6
PRECIP AMOUNT 0.10 0.00 0.00
PRECIP DURATION 3
PRECIP BEGIN 6 AM
PRECIP END 5 PM
MIXING HGT(M-AGL/MSL) 630 1530
MIXING HGT(FT-AGL/MSL)2060 5020
TRANSPORT WND (MPH) N 16 E 13
VENT RATE (KT-FT) 28840 55220
CATEGORY DAY 3 4
INVERSION 68F/8AM 9PM 49F/8AM
DISPERSION 3 4
MAX ADI EARLY 25 FAIR 18 GEN POOR 48 GEN GOOD
MAX ADI LATE 40 FAIR 8 POOR 73 GOOD
MAX LVORI EARLY 5 3 4
MAX LVORI LATE 3 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ014-202015-
BUTLER-
INCLUDING THE CITY OF BUTLER
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 70 10 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 71 (-14) 44 (-21) 70
RH % (24H TREND) 66 (+11) 84 (-8) 43
WIND 20FT/EARLY(MPH) W 5 N 5 NE 6
WIND 20FT/LATE(MPH) N 8 LGT/VAR NE 6
PRECIP AMOUNT 0.09 0.01 0.00
PRECIP DURATION 4 1
PRECIP BEGIN 6 AM 7 PM
PRECIP END 6 PM 6 AM
MIXING HGT(M-AGL/MSL) 580 1590
MIXING HGT(FT-AGL/MSL)1910 5210
TRANSPORT WND (MPH) N 15 E 13
VENT RATE (KT-FT) 24830 57310
CATEGORY DAY 3 4
INVERSION 68F/8AM 9PM 49F/8AM
DISPERSION 3 4
MAX ADI EARLY 23 FAIR 16 GEN POOR 48 GEN GOOD
MAX ADI LATE 36 FAIR 7 POOR 74 GOOD
MAX LVORI EARLY 6 3 4
MAX LVORI LATE 4 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ015-202015-
CLARION-
INCLUDING THE CITY OF CLARION
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS NONE NONE
CHANCE PRECIP (%) 70 0 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 70 (-13) 45 (-19) 70
RH % (24H TREND) 60 (+1) 80 (-9) 36
WIND 20FT/EARLY(MPH) LGT/VAR N 5 NE 5
WIND 20FT/LATE(MPH) N 7 LGT/VAR NE 5
PRECIP AMOUNT 0.06 0.00 0.00
PRECIP DURATION 4
PRECIP BEGIN 6 AM
PRECIP END 5 PM
MIXING HGT(M-AGL/MSL) 610 1710
MIXING HGT(FT-AGL/MSL)2010 5600
TRANSPORT WND (MPH) N 15 NE 13
VENT RATE (KT-FT) 26130 61600
CATEGORY DAY 3 4
INVERSION 68F/8AM 9PM 47F/7AM
DISPERSION 3 4
MAX ADI EARLY 26 FAIR 9 POOR 49 GEN GOOD
MAX ADI LATE 35 FAIR 8 POOR 82 GOOD
MAX LVORI EARLY 6 3 4
MAX LVORI LATE 3 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ016-202015-
JEFFERSON PA-
INCLUDING THE CITIES OF PUNXSUTAWNEY AND BROOKVILLE
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 70 20 0
CHANCE OF THUNDER (%) 20 0 0
TEMP (24H TREND) 71 (-11) 46 (-18) 68
RH % (24H TREND) 59 (+1) 76 (-13) 36
WIND 20FT/EARLY(MPH) W 5 N 5 NE 5
WIND 20FT/LATE(MPH) NW 7 LGT/VAR NE 6
PRECIP AMOUNT 0.07 0.02 0.00
PRECIP DURATION 3 0
PRECIP BEGIN 6 AM CONTINUING
PRECIP END CONTINUING 6 AM
MIXING HGT(M-AGL/MSL) 640 1650
MIXING HGT(FT-AGL/MSL)2110 5430
TRANSPORT WND (MPH) NW 13 E 13
VENT RATE (KT-FT) 23210 59730
CATEGORY DAY 2 4
INVERSION 68F/8AM 10PM 48F/7AM
DISPERSION 2 4
MAX ADI EARLY 29 FAIR 9 POOR 48 GEN GOOD
MAX ADI LATE 34 FAIR 8 POOR 78 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.
PAZ020-202015-
BEAVER-
INCLUDING THE CITIES OF ALIQUIPPA, BEAVER FALLS, AMBRIDGE,
AND MONACA
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 80 20 0
CHANCE OF THUNDER (%) 30 0 0
TEMP (24H TREND) 70 (-17) 47 (-19) 70
RH % (24H TREND) 61 (+19) 80 (-13) 42
WIND 20FT/EARLY(MPH) LGT/VAR N 6 NE 5
WIND 20FT/LATE(MPH) N 8 LGT/VAR NE 6
PRECIP AMOUNT 0.08 0.01 0.00
PRECIP DURATION 4 1
PRECIP BEGIN 6 AM CONTINUING
PRECIP END CONTINUING 6 AM
MIXING HGT(M-AGL/MSL) 570 1470
MIXING HGT(FT-AGL/MSL)1880 4840
TRANSPORT WND (MPH) N 16 E 13
VENT RATE (KT-FT) 26320 53240
CATEGORY DAY 2 4
INVERSION 70F/8AM 10PM 50F/8AM
DISPERSION 2 4
MAX ADI EARLY 23 FAIR 17 GEN POOR 46 GEN GOOD
MAX ADI LATE 36 FAIR 8 POOR 73 GOOD
MAX LVORI EARLY 5 3 4
MAX LVORI LATE 4 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ021-202015-
ALLEGHENY-
INCLUDING THE CITY OF PITTSBURGH METRO AREA
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 80 50 40
CHANCE OF THUNDER (%) 40 0 0
TEMP (24H TREND) 75 (-10) 48 (-18) 69
RH % (24H TREND) 67 (+12) 85 (-4) 46
WIND 20FT/EARLY(MPH) W 5 N 7 NE 7
WIND 20FT/LATE(MPH) NW 9 N 5 NE 8
PRECIP AMOUNT 0.20 0.02 0.00
PRECIP DURATION 4 2 1
PRECIP BEGIN 6 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING 11 AM
MIXING HGT(M-AGL/MSL) 670 1500
MIXING HGT(FT-AGL/MSL)2200 4910
TRANSPORT WND (MPH) NW 12 E 14
VENT RATE (KT-FT) 22000 58920
CATEGORY DAY 2 4
INVERSION 71F/8AM 1AM 50F/7AM
DISPERSION 2 4
MAX ADI EARLY 25 FAIR 16 GEN POOR 47 GEN GOOD
MAX ADI LATE 33 FAIR 8 POOR 73 GOOD
MAX LVORI EARLY 5 3 4
MAX LVORI LATE 3 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ022-202015-
ARMSTRONG-
INCLUDING THE CITIES OF KITTANNING AND FORD CITY
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 80 20 0
CHANCE OF THUNDER (%) 30 0 0
TEMP (24H TREND) 73 (-10) 47 (-18) 69
RH % (24H TREND) 65 (+2) 86 (-3) 44
WIND 20FT/EARLY(MPH) LGT/VAR N 5 NE 6
WIND 20FT/LATE(MPH) NW 7 LGT/VAR E 6
PRECIP AMOUNT 0.13 0.02 0.00
PRECIP DURATION 5 1
PRECIP BEGIN 6 AM CONTINUING
PRECIP END CONTINUING 6 AM
MIXING HGT(M-AGL/MSL) 600 1570
MIXING HGT(FT-AGL/MSL)1960 5170
TRANSPORT WND (MPH) NW 12 E 13
VENT RATE (KT-FT) 19600 56870
CATEGORY DAY 2 4
INVERSION 69F/8AM 10PM 51F/8AM
DISPERSION 2 4
MAX ADI EARLY 26 FAIR 15 GEN POOR 46 GEN GOOD
MAX ADI LATE 34 FAIR 6 VERY POOR 74 GOOD
MAX LVORI EARLY 5 3 4
MAX LVORI LATE 3 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ029-202015-
WASHINGTON-
INCLUDING THE CITIES OF WASHINGTON AND CANONSBURG
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 90 60 50
CHANCE OF THUNDER (%) 40 0 0
TEMP (24H TREND) 75 (-11) 47 (-18) 68
RH % (24H TREND) 69 (+21) 88 (-3) 49
WIND 20FT/EARLY(MPH) SW 5 N 8 NE 7
WIND 20FT/LATE(MPH) NW 8 N 5 NE 9
PRECIP AMOUNT 0.24 0.03 0.01
PRECIP DURATION 6 5 2
PRECIP BEGIN 6 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING 2 PM
MIXING HGT(M-AGL/MSL) 720 1290
MIXING HGT(FT-AGL/MSL)2370 4250
TRANSPORT WND (MPH) W 12 E 15
VENT RATE (KT-FT) 23700 55250
CATEGORY DAY 2 4
INVERSION 71F/8AM 2AM 51F/8AM
DISPERSION 2 4
MAX ADI EARLY 26 FAIR 18 GEN POOR 46 GEN GOOD
MAX ADI LATE 32 FAIR 8 POOR 65 GOOD
MAX LVORI EARLY 5 3 4
MAX LVORI LATE 3 4 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ031-202015-
GREENE-
INCLUDING THE CITY OF WAYNESBURG
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 90 80 70
CHANCE OF THUNDER (%) 50 30 0
TEMP (24H TREND) 77 (-10) 48 (-17) 67
RH % (24H TREND) 73 (+19) 92 (0) 62
WIND 20FT/EARLY(MPH) SW 5 N 6 NE 6
WIND 20FT/LATE(MPH) NW 7 N 5 NE 7
PRECIP AMOUNT 0.31 0.12 0.06
PRECIP DURATION 7 7 3
PRECIP BEGIN 6 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 840 940
MIXING HGT(FT-AGL/MSL)2770 3100
TRANSPORT WND (MPH) W 13 E 14
VENT RATE (KT-FT) 30470 37200
CATEGORY DAY 3 3
INVERSION 71F/8AM 4AM 50F/7AM
DISPERSION 3 3
MAX ADI EARLY 34 FAIR 17 GEN POOR 34 FAIR
MAX ADI LATE 37 FAIR 8 POOR 50 GEN GOOD
MAX LVORI EARLY 4 4 5
MAX LVORI LATE 4 5 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ073-202015-
WESTMORELAND-
INCLUDING THE CITIES OF MURRYSVILLE, GREENSBURG, NEW KENSINGTON,
LOWER BURRELL, LATROBE, AND MONESSEN
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 90 60 60
CHANCE OF THUNDER (%) 40 20 0
TEMP (24H TREND) 75 (-8) 48 (-18) 69
RH % (24H TREND) 73 (+8) 92 (+2) 50
WIND 20FT/EARLY(MPH) SW 6 N 6 NE 6
WIND 20FT/LATE(MPH) NW 8 LGT/VAR E 7
PRECIP AMOUNT 0.26 0.03 0.01
PRECIP DURATION 6 4 2
PRECIP BEGIN 7 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING 2 PM
MIXING HGT(M-AGL/MSL) 740 1300
MIXING HGT(FT-AGL/MSL)2440 4270
TRANSPORT WND (MPH) W 12 E 13
VENT RATE (KT-FT) 24400 46970
CATEGORY DAY 2 3
INVERSION 70F/8AM 2AM 51F/7AM
DISPERSION 2 3
MAX ADI EARLY 31 FAIR 15 GEN POOR 38 FAIR
MAX ADI LATE 32 FAIR 7 POOR 58 GEN GOOD
MAX LVORI EARLY 5 4 5
MAX LVORI LATE 3 5 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ074-202015-
HIGHER ELEVATIONS OF WESTMORELAND-
INCLUDING THE CITIES OF LIGONIER AND DONEGAL
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 90 70 60
CHANCE OF THUNDER (%) 50 20 0
TEMP (24H TREND) 76 (-5) 49 (-16) 68
RH % (24H TREND) 69 (+4) 90 (+1) 47
WIND 20FT/EARLY(MPH) SW 6 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) NW 6 LGT/VAR E 5
PRECIP AMOUNT 0.23 0.07 0.03
PRECIP DURATION 5 4 3
PRECIP BEGIN 8 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 800 1060
MIXING HGT(FT-AGL/MSL)2610 3490
TRANSPORT WND (MPH) W 14 E 13
VENT RATE (KT-FT) 31320 38390
CATEGORY DAY 3 3
INVERSION 71F/8AM NONE NONE
DISPERSION 3 3
MAX ADI EARLY 38 FAIR 8 POOR 30 FAIR
MAX ADI LATE 41 GEN GOOD 5 VERY POOR 49 GEN GOOD
MAX LVORI EARLY 4 4 4
MAX LVORI LATE 3 5 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ075-202015-
FAYETTE-
INCLUDING THE CITY OF UNIONTOWN
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 90 80 70
CHANCE OF THUNDER (%) 50 20 0
TEMP (24H TREND) 77 (-8) 49 (-17) 68
RH % (24H TREND) 72 (+16) 94 (+5) 59
WIND 20FT/EARLY(MPH) SW 5 N 5 NE 5
WIND 20FT/LATE(MPH) NW 6 LGT/VAR E 6
PRECIP AMOUNT 0.31 0.10 0.07
PRECIP DURATION 6 6 4
PRECIP BEGIN 6 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 830 920
MIXING HGT(FT-AGL/MSL)2720 3020
TRANSPORT WND (MPH) W 13 E 13
VENT RATE (KT-FT) 29920 33220
CATEGORY DAY 3 3
INVERSION 71F/8AM 5AM 51F/7AM
DISPERSION 3 3
MAX ADI EARLY 33 FAIR 15 GEN POOR 29 FAIR
MAX ADI LATE 37 FAIR 8 POOR 41 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.
PAZ076-202015-
HIGHER ELEVATIONS OF FAYETTE-
INCLUDING THE CITIES OF CHAMPION AND OHIOPYLE
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 80 80 70
CHANCE OF THUNDER (%) 50 20 0
TEMP (24H TREND) 76 (-5) 49 (-16) 65
RH % (24H TREND) 71 (+8) 97 (+8) 58
WIND 20FT/EARLY(MPH) SW 5 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) W 5 LGT/VAR E 5
PRECIP AMOUNT 0.27 0.12 0.10
PRECIP DURATION 6 7 4
PRECIP BEGIN 7 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 830 720
MIXING HGT(FT-AGL/MSL)2710 2370
TRANSPORT WND (MPH) W 15 E 13
VENT RATE (KT-FT) 35230 26070
CATEGORY DAY 3 3
INVERSION 70F/8AM NONE NONE
DISPERSION 3 3
MAX ADI EARLY 36 FAIR 8 POOR 25 FAIR
MAX ADI LATE 42 GEN GOOD 5 VERY POOR 35 FAIR
MAX LVORI EARLY 5 5 5
MAX LVORI LATE 4 6 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ077-202015-
INDIANA-
INCLUDING THE CITY OF INDIANA
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 80 40 30
CHANCE OF THUNDER (%) 40 0 0
TEMP (24H TREND) 75 (-7) 48 (-17) 68
RH % (24H TREND) 67 (+5) 87 (-2) 44
WIND 20FT/EARLY(MPH) W 5 N 5 NE 5
WIND 20FT/LATE(MPH) NW 7 LGT/VAR E 6
PRECIP AMOUNT 0.18 0.03 0.00
PRECIP DURATION 4 2 1
PRECIP BEGIN 8 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING 11 AM
MIXING HGT(M-AGL/MSL) 650 1640
MIXING HGT(FT-AGL/MSL)2150 5390
TRANSPORT WND (MPH) W 13 E 13
VENT RATE (KT-FT) 23650 59290
CATEGORY DAY 2 4
INVERSION 69F/8AM 12AM 50F/7AM
DISPERSION 2 4
MAX ADI EARLY 31 FAIR 14 GEN POOR 40 FAIR
MAX ADI LATE 30 FAIR 5 VERY POOR 75 GOOD
MAX LVORI EARLY 5 3 4
MAX LVORI LATE 3 5 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
PAZ078-202015-
HIGHER ELEVATIONS OF INDIANA-
INCLUDING THE CITY OF ARMAGH
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 90 50 40
CHANCE OF THUNDER (%) 40 20 0
TEMP (24H TREND) 75 (-4) 49 (-16) 68
RH % (24H TREND) 71 (+8) 85 (-4) 45
WIND 20FT/EARLY(MPH) W 6 LGT/VAR NE 5
WIND 20FT/LATE(MPH) NW 7 LGT/VAR E 6
PRECIP AMOUNT 0.23 0.03 0.00
PRECIP DURATION 5 2 1
PRECIP BEGIN 8 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING 2 PM
MIXING HGT(M-AGL/MSL) 720 1490
MIXING HGT(FT-AGL/MSL)2350 4890
TRANSPORT WND (MPH) W 14 E 13
VENT RATE (KT-FT) 28200 53790
CATEGORY DAY 3 4
INVERSION 70F/8AM NONE NONE
DISPERSION 3 4
MAX ADI EARLY 36 FAIR 14 GEN POOR 36 FAIR
MAX ADI LATE 35 FAIR 5 VERY POOR 65 GOOD
MAX LVORI EARLY 4 4 4
MAX LVORI LATE 3 5 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ001-202015-
HANCOCK-
INCLUDING THE CITY OF WEIRTON
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS NONE
CHANCE PRECIP (%) 80 30 0
CHANCE OF THUNDER (%) 30 0 0
TEMP (24H TREND) 70 (-18) 47 (-18) 70
RH % (24H TREND) 61 (+19) 78 (-20) 42
WIND 20FT/EARLY(MPH) LGT/VAR N 7 NE 6
WIND 20FT/LATE(MPH) N 8 N 5 NE 7
PRECIP AMOUNT 0.09 0.01 0.00
PRECIP DURATION 4 1
PRECIP BEGIN 6 AM CONTINUING
PRECIP END CONTINUING 6 AM
MIXING HGT(M-AGL/MSL) 540 1450
MIXING HGT(FT-AGL/MSL)1790 4760
TRANSPORT WND (MPH) N 13 E 14
VENT RATE (KT-FT) 19690 57120
CATEGORY DAY 2 4
INVERSION 69F/8AM 1AM 50F/8AM
DISPERSION 2 4
MAX ADI EARLY 21 FAIR 17 GEN POOR 49 GEN GOOD
MAX ADI LATE 36 FAIR 8 POOR 78 GOOD
MAX LVORI EARLY 5 3 4
MAX LVORI LATE 3 3 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ002-202015-
BROOKE-
INCLUDING THE CITIES OF FOLLANSBEE AND WELLSBURG
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 90 50 30
CHANCE OF THUNDER (%) 30 0 0
TEMP (24H TREND) 72 (-15) 48 (-17) 70
RH % (24H TREND) 63 (+21) 80 (-16) 44
WIND 20FT/EARLY(MPH) LGT/VAR N 8 NE 7
WIND 20FT/LATE(MPH) N 8 N 5 NE 8
PRECIP AMOUNT 0.20 0.02 0.00
PRECIP DURATION 5 2 0
PRECIP BEGIN 6 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING 10 AM
MIXING HGT(M-AGL/MSL) 610 1400
MIXING HGT(FT-AGL/MSL)2000 4610
TRANSPORT WND (MPH) NW 10 E 14
VENT RATE (KT-FT) 18000 55320
CATEGORY DAY 2 4
INVERSION 70F/8AM 2AM 51F/8AM
DISPERSION 2 4
MAX ADI EARLY 21 FAIR 18 GEN POOR 48 GEN GOOD
MAX ADI LATE 35 FAIR 8 POOR 74 GOOD
MAX LVORI EARLY 5 3 4
MAX LVORI LATE 3 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ003-202015-
OHIO-
INCLUDING THE CITY OF WHEELING
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS
CHANCE PRECIP (%) 90 60 40
CHANCE OF THUNDER (%) 40 0 0
TEMP (24H TREND) 73 (-15) 48 (-17) 69
RH % (24H TREND) 70 (+28) 84 (-10) 49
WIND 20FT/EARLY(MPH) SW 5 N 8 NE 7
WIND 20FT/LATE(MPH) NW 7 N 6 NE 8
PRECIP AMOUNT 0.28 0.02 0.00
PRECIP DURATION 6 4 1
PRECIP BEGIN 6 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING 11 AM
MIXING HGT(M-AGL/MSL) 620 1200
MIXING HGT(FT-AGL/MSL)2050 3940
TRANSPORT WND (MPH) W 10 E 15
VENT RATE (KT-FT) 18450 51220
CATEGORY DAY 2 4
INVERSION 70F/8AM 3AM 51F/8AM
DISPERSION 2 4
MAX ADI EARLY 20 GEN POOR 18 GEN POOR 47 GEN GOOD
MAX ADI LATE 34 FAIR 13 GEN POOR 68 GOOD
MAX LVORI EARLY 5 3 4
MAX LVORI LATE 3 4 1
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ004-202015-
MARSHALL-
INCLUDING THE CITY OF MOUNDSVILLE
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY PCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 90 70 60
CHANCE OF THUNDER (%) 50 20 0
TEMP (24H TREND) 76 (-11) 49 (-16) 70
RH % (24H TREND) 73 (+22) 90 (-5) 55
WIND 20FT/EARLY(MPH) LGT/VAR N 7 NE 6
WIND 20FT/LATE(MPH) NW 6 N 6 NE 7
PRECIP AMOUNT 0.33 0.10 0.02
PRECIP DURATION 7 6 2
PRECIP BEGIN 6 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING 2 PM
MIXING HGT(M-AGL/MSL) 670 1040
MIXING HGT(FT-AGL/MSL)2210 3420
TRANSPORT WND (MPH) W 12 E 14
VENT RATE (KT-FT) 22100 41040
CATEGORY DAY 2 3
INVERSION 71F/8AM 4AM 51F/8AM
DISPERSION 2 3
MAX ADI EARLY 27 FAIR 17 GEN POOR 40 FAIR
MAX ADI LATE 30 FAIR 11 POOR 57 GEN GOOD
MAX LVORI EARLY 4 4 4
MAX LVORI LATE 4 4 2
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ012-202015-
WETZEL-
INCLUDING THE CITY OF NEW MARTINSVILLE
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 80 80 70
CHANCE OF THUNDER (%) 50 30 0
TEMP (24H TREND) 77 (-10) 50 (-15) 69
RH % (24H TREND) 76 (+23) 93 (-1) 61
WIND 20FT/EARLY(MPH) LGT/VAR N 7 NE 6
WIND 20FT/LATE(MPH) NW 6 NE 6 NE 6
PRECIP AMOUNT 0.43 0.19 0.05
PRECIP DURATION 7 9 3
PRECIP BEGIN 6 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 790 1000
MIXING HGT(FT-AGL/MSL)2590 3280
TRANSPORT WND (MPH) W 12 E 15
VENT RATE (KT-FT) 25900 42640
CATEGORY DAY 2 3
INVERSION 72F/9AM 12AM 53F/4AM
DISPERSION 2 3
MAX ADI EARLY 31 FAIR 17 GEN POOR 29 FAIR
MAX ADI LATE 34 FAIR 11 POOR 48 GEN GOOD
MAX LVORI EARLY 4 4 4
MAX LVORI LATE 4 4 3
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ021-202015-
MARION-
INCLUDING THE CITY OF FAIRMONT
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 80 80 70
CHANCE OF THUNDER (%) 60 30 0
TEMP (24H TREND) 78 (-9) 50 (-15) 67
RH % (24H TREND) 75 (+22) 97 (+7) 69
WIND 20FT/EARLY(MPH) LGT/VAR N 6 NE 6
WIND 20FT/LATE(MPH) W 5 NE 5 NE 6
PRECIP AMOUNT 0.34 0.18 0.09
PRECIP DURATION 5 8 5
PRECIP BEGIN 7 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 860 850
MIXING HGT(FT-AGL/MSL)2820 2790
TRANSPORT WND (MPH) W 13 E 14
VENT RATE (KT-FT) 31020 33480
CATEGORY DAY 3 3
INVERSION 70F/8AM 12AM 54F/4AM
DISPERSION 3 3
MAX ADI EARLY 37 FAIR 13 GEN POOR 23 FAIR
MAX ADI LATE 39 FAIR 8 POOR 41 GEN GOOD
MAX LVORI EARLY 5 4 5
MAX LVORI LATE 4 6 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ509-202015-
MONONGALIA-
INCLUDING THE CITY OF MORGANTOWN
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER MCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 80 80 70
CHANCE OF THUNDER (%) 60 30 0
TEMP (24H TREND) 78 (-8) 50 (-16) 67
RH % (24H TREND) 72 (+18) 95 (+6) 65
WIND 20FT/EARLY(MPH) LGT/VAR N 6 NE 6
WIND 20FT/LATE(MPH) W 6 N 5 NE 6
PRECIP AMOUNT 0.39 0.20 0.10
PRECIP DURATION 6 8 5
PRECIP BEGIN 7 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 850 840
MIXING HGT(FT-AGL/MSL)2780 2770
TRANSPORT WND (MPH) W 13 E 14
VENT RATE (KT-FT) 30580 33240
CATEGORY DAY 3 3
INVERSION 71F/8AM 12AM 54F/4AM
DISPERSION 3 3
MAX ADI EARLY 36 FAIR 15 GEN POOR 24 FAIR
MAX ADI LATE 38 FAIR 8 POOR 39 FAIR
MAX LVORI EARLY 4 4 5
MAX LVORI LATE 4 5 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ510-202015-
RIDGES OF EASTERN MONONGALIA AND NORTHWESTERN PRESTON-
INCLUDING THE CITY OF COOPERS ROCK
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS SHOWERS
CHANCE PRECIP (%) 80 90 60
CHANCE OF THUNDER (%) 60 30 0
TEMP (24H TREND) 77 (-7) 50 (-15) 64
RH % (24H TREND) 71 (+16) 98 (+11) 66
WIND 20FT/EARLY(MPH) LGT/VAR N 5 LGT/VAR
WIND 20FT/LATE(MPH) W 5 LGT/VAR E 5
PRECIP AMOUNT 0.32 0.22 0.13
PRECIP DURATION 6 7 5
PRECIP BEGIN 7 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 830 620
MIXING HGT(FT-AGL/MSL)2710 2020
TRANSPORT WND (MPH) W 13 E 14
VENT RATE (KT-FT) 29810 24240
CATEGORY DAY 3 2
INVERSION 69F/8AM 12AM 53F/5AM
DISPERSION 3 2
MAX ADI EARLY 37 FAIR 8 POOR 23 FAIR
MAX ADI LATE 40 FAIR 7 POOR 33 FAIR
MAX LVORI EARLY 5 5 6
MAX LVORI LATE 4 6 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ511-202015-
PRESTON-
INCLUDING THE CITIES OF KINGWOOD AND BRUCETON MILLS
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 80 90 70
CHANCE OF THUNDER (%) 60 30 20
TEMP (24H TREND) 79 (-5) 51 (-13) 65
RH % (24H TREND) 68 (+13) 99 (+11) 65
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) W 5 LGT/VAR E 5
PRECIP AMOUNT 0.25 0.23 0.15
PRECIP DURATION 4 8 5
PRECIP BEGIN 7 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 940 580
MIXING HGT(FT-AGL/MSL)3080 1900
TRANSPORT WND (MPH) W 15 E 14
VENT RATE (KT-FT) 40040 22800
CATEGORY DAY 3 2
INVERSION 70F/8AM 8PM 55F/5AM
DISPERSION 3 2
MAX ADI EARLY 46 GEN GOOD 8 POOR 23 FAIR
MAX ADI LATE 50 GEN GOOD 4 VERY POOR 31 FAIR
MAX LVORI EARLY 5 5 6
MAX LVORI LATE 3 7 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ512-202015-
EASTERN PRESTON-
INCLUDING THE CITIES OF TERRA ALTA, ROWLESBURG, AND HAZELTON
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 70 90 80
CHANCE OF THUNDER (%) 50 30 20
TEMP (24H TREND) 78 (-4) 52 (-12) 64
RH % (24H TREND) 67 (+10) 99 (+11) 67
WIND 20FT/EARLY(MPH) SW 5 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) W 6 LGT/VAR E 5
PRECIP AMOUNT 0.19 0.21 0.23
PRECIP DURATION 4 7 6
PRECIP BEGIN 8 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 1080 500
MIXING HGT(FT-AGL/MSL)3560 1640
TRANSPORT WND (MPH) W 17 E 15
VENT RATE (KT-FT) 53400 21320
CATEGORY DAY 4 2
INVERSION 69F/8AM 8PM 55F/9AM
DISPERSION 4 2
MAX ADI EARLY 53 GEN GOOD 8 POOR 23 FAIR
MAX ADI LATE 66 GOOD 4 VERY POOR 28 FAIR
MAX LVORI EARLY 4 6 6
MAX LVORI LATE 3 6 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ513-202015-
WESTERN TUCKER-
INCLUDING THE CITIES OF PARSONS, HENDRICKS, AND SAINT GEORGE
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 90 80
CHANCE OF THUNDER (%) 50 40 20
TEMP (24H TREND) 80 (-6) 55 (-8) 67
RH % (24H TREND) 62 (+14) 97 (+10) 65
WIND 20FT/EARLY(MPH) LGT/VAR LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) W 6 LGT/VAR LGT/VAR
PRECIP AMOUNT 0.22 0.27 0.31
PRECIP DURATION 4 8 8
PRECIP BEGIN 8 AM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 1260 480
MIXING HGT(FT-AGL/MSL)4140 1590
TRANSPORT WND (MPH) W 18 E 12
VENT RATE (KT-FT) 66240 15900
CATEGORY DAY 4 2
INVERSION 70F/9AM 8PM 59F/10AM
DISPERSION 4 2
MAX ADI EARLY 67 GOOD 8 POOR 14 GEN POOR
MAX ADI LATE 89 GOOD 3 VERY POOR 23 FAIR
MAX LVORI EARLY 4 5 7
MAX LVORI LATE 2 7 4
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
WVZ514-202015-
EASTERN TUCKER-
INCLUDING THE CITIES OF DAVIS, THOMAS, AND CANAAN VALLEY
229 AM EDT WED MAY 20 2026
TODAY TONIGHT THU
CLOUD COVER PCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 50 90 90
CHANCE OF THUNDER (%) 50 40 20
TEMP (24H TREND) 78 (-3) 52 (-8) 62
RH % (24H TREND) 61 (+12) 100 (+11) 75
WIND 20FT/EARLY(MPH) W 6 G22 LGT/VAR LGT/VAR
WIND 20FT/LATE(MPH) W 7 G21 LGT/VAR E 5
PRECIP AMOUNT 0.13 0.18 0.35
PRECIP DURATION 1 7 9
PRECIP BEGIN 1 PM CONTINUING CONTINUING
PRECIP END CONTINUING CONTINUING CONTINUING
MIXING HGT(M-AGL/MSL) 1300 390
MIXING HGT(FT-AGL/MSL)4260 1270
TRANSPORT WND (MPH) W 21 E 10
VENT RATE (KT-FT) 76680 11430
CATEGORY DAY 4 1
INVERSION 67F/8AM 8PM 56F/9AM
DISPERSION 4 1
MAX ADI EARLY 78 GOOD 13 GEN POOR 15 GEN POOR
MAX ADI LATE 92 GOOD 4 VERY POOR 22 FAIR
MAX LVORI EARLY 4 6 7
MAX LVORI LATE 2 6 5
REMARKS...ADI IS ATMOSPHERIC DISPERSION INDEX BY LAVDAS.
LVORI IS LOW VISIBILITY OCCURRENCE RISK INDEX.
FORECAST FOR DAYS 3 THROUGH 7
FRIDAY
SHOWERS. LOWS IN THE LOWER 50S. HIGHS IN THE MID 60S.
EAST WINDS 5 TO 10 MPH.
SATURDAY
SHOWERS AND A CHANCE OF THUNDERSTORMS. LOWS IN THE
LOWER 50S. HIGHS AROUND 70. EAST WINDS AROUND 10 MPH.
SUNDAY
MOSTLY CLOUDY WITH SHOWERS LIKELY AND A CHANCE OF
THUNDERSTORMS. LOWS IN THE UPPER 50S. HIGHS IN THE UPPER 70S.
SOUTH WINDS 15 TO 20 MPH.
MONDAY
MOSTLY CLOUDY WITH SHOWERS LIKELY. LOWS IN THE LOWER
60S. HIGHS IN THE UPPER 70S. SOUTHWEST WINDS 5 TO 10 MPH.
TUESDAY
MOSTLY CLOUDY WITH A CHANCE OF SHOWERS. LOWS IN THE
LOWER 60S. HIGHS AROUND 80. WEST WINDS AROUND 5 MPH.
CL
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