941
FNUS72 KGSP 241158
FWSGSP
SPOT FORECAST FOR C-189...FS
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
758 AM EDT TUE MAR 24 2026
FORECAST IS BASED ON IGNITION TIME OF 0800 EDT ON MARCH 24.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
HIGH PRESSURE BUILDING INTO THE AREA FROM THE NORTH WILL MAINTAIN
BREEZY NORTHEASTERLY WINDS TODAY, THOUGH THE HIGHER GUSTS WILL BE
DURING THE MORNING. INVERSION WILL REMAIN STRONGER ALOFT TODAY
COMPARED TO MONDAY, WHICH SHOULD LIMIT THE POTENTIAL FOR
SUBSTANTIALLY DRIER AIR TO MIX DOWN AS OCCURRED MONDAY EVENING.
NEVERTHELESS RELATIVE HUMIDITY FORECASTS TODAY WILL BE SENSITIVE
TO SLIGHT CHANGES IN MIXING DEPTH. A REASONABLE WORST-CASE VALUE
HAS BEEN INCLUDED IN TODAY'S AND WEDNESDAY'S NARRATIVE FORECASTS
BELOW. EXPECT LIGHT WINDS WEDNESDAY.
REST OF TODAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT) THEN BECOMING
MOSTLY SUNNY (25-35 PERCENT).
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 64.
MIN HUMIDITY........MOST LIKELY 25 PERCENT, PERHAPS AS LOW AS 20
PERCENT IF MIXING IS DEEPER THAN ANTICIPATED.
WIND (20 FT)........NORTHEAST WINDS 6 TO 8 MPH. GUSTS UP TO 21 MPH
IN THE MORNING.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WINDS.....NORTHEAST 15 TO 23 MPH SHIFTING TO THE EAST 9
TO 13 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....GOOD (36482 MPH-FT).
LVORI...............1.
ADI.................44 TO 64.
STABILITY CLASS.....2.
PCPN AMOUNT.........0.00 INCHES.
CEILING (FT)........13800 INCREASING TO 35000 LATE IN THE
AFTERNOON.
SFC PRESSURE (IN)...29.7.
TIME (EDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........86 64 69 71 62 48 33 15 13 8
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0
TEMP............45 46 49 52 56 58 61 63 63 64
DEWPOINT........26 27 27 28 28 28 27 27 27 27
RH..............47 46 43 39 34 30 27 26 25 25
20 FT WIND DIR..NE NE NE NE NE NE NE NE NE E
20 FT WIND SPD..8 8 8 8 8 7 7 6 6 6
20 FT WIND GUST.21 21 21 20 18 16 16 15 14 14
MIX HGT (KFT)...2.0 2.6 2.6 2.8 3.0 3.2 3.5 3.8 4.0 4.0
TRANSP WIND DIR.NE NE NE E E E E E E E
TRANSP WIND SPD.23 22 20 17 15 15 13 12 10 9
LVORI...........1 1 1 1 1 1 1 1 1 1
ADI.............57 64 58 54 48 59 54 53 49 44
VRATE MPH-FT/1K.47 56 51 49 45 48 44 44 41 36
CEILING (HFT)...171 159 148 138 138 138 138 138 148 350
SFC PRES (IN)...973 975 976 978 978 977 976 974 972 970
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT) THEN BECOMING
MOSTLY CLOUDY (55-65 PERCENT).
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....AROUND 42.
MAX HUMIDITY........68 PERCENT.
WIND (20 FT)........EAST WINDS AROUND 5 MPH EARLY IN THE EVENING
BECOMING LIGHT.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....EAST 8 TO 10 MPH.
SMOKE DISPERSAL.....GOOD (33375 MPH-FT) EARLY IN THE EVENING
DECREASING TO POOR (4373 MPH-FT) LATE IN THE
NIGHT.
LVORI...............2.
ADI.................4 TO 41.
STABILITY CLASS.....4.
PCPN AMOUNT.........0.00 INCHES.
CEILING (FT)........26600 DECREASING TO 12700 LATE IN THE EVENING.
SFC PRESSURE (IN)...29.7.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........6 8 8 21 21 34 41 48 46 50 49 60
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............63 61 57 52 50 49 48 46 45 44 43 43
DEWPOINT........28 28 29 29 29 29 28 28 29 29 30 30
RH..............26 29 34 41 44 46 47 49 51 54 59 61
20 FT WIND DIR..E E E E E E E E E E E NE
20 FT WIND SPD..5 3 2 3 3 3 2 2 2 2 2 2
20 FT WIND GUST.13 10 9 9 9 9 9 9 9 8 7 7
MIX HGT (KFT)...3.6 2.4 0.6 0.6 0.6 0.7 0.6 0.6 0.6 0.6 0.6 0.5
TRANSP WIND DIR.E E E E E E E E E E E E
TRANSP WIND SPD.9 8 8 9 10 10 10 10 9 10 8 8
LVORI...........1 2 2 2 2 2 2 2 2 2 3 3
ADI.............41 4 4 4 5 5 5 5 4 5 4 4
VRATE MPH-FT/1K.33 19 5 5 6 7 7 6 5 6 4 4
CEILING (HFT)...300 266 266 266 266 138 138 127 127 127 127 127
SFC PRES (IN)...971 972 973 974 976 977 976 975 974 973 972 970
WEDNESDAY
SKY/WEATHER.........PARTLY SUNNY (55-65 PERCENT).
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 66.
MIN HUMIDITY........33 PERCENT.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......4000 FT AGL.
TRANSPORT WINDS.....EAST 6 TO 9 MPH SHIFTING TO THE SOUTH AROUND 7
MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (4258 MPH-FT) EARLY IN THE MORNING
INCREASING TO FAIR (27851 MPH-FT) IN THE
AFTERNOON.
LVORI...............2.
ADI.................4 TO 33.
STABILITY CLASS.....4.
PCPN AMOUNT.........0.00 INCHES.
CEILING (FT)........12700 DECREASING TO 5500 IN THE LATE MORNING
AND EARLY AFTERNOON, THEN INCREASING TO 9800
LATE IN THE AFTERNOON.
SFC PRESSURE (IN)...29.66.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........66 72 62 60 59 57 56 55 54 53 51 50
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............42 42 43 45 49 54 59 62 64 66 66 66
DEWPOINT........31 32 33 33 34 35 36 36 36 36 37 38
RH..............64 67 68 64 56 48 42 38 35 33 34 36
20 FT WIND DIR..NE NE NE NE E E E E E SE S S
20 FT WIND SPD..2 2 2 1 2 2 2 2 2 2 2 2
20 FT WIND GUST.7 8 8 7 7 7 7 7 7 7 7 6
MIX HGT (KFT)...0.5 0.5 0.5 1.3 1.8 2.4 2.7 3.0 3.3 3.5 3.8 4.0
TRANSP WIND DIR.E E E E E E E E E SE S S
TRANSP WIND SPD.8 8 9 9 8 7 7 7 6 6 7 7
LVORI...........3 3 3 2 2 2 2 2 2 2 1 1
ADI.............4 8 10 16 19 19 21 22 19 20 31 33
VRATE MPH-FT/1K.4 4 5 12 15 16 19 19 19 21 25 28
CEILING (HFT)...127 127 127 127 55 55 55 55 55 55 108 98
SFC PRES (IN)...972 973 975 975 976 976 975 974 972 970 968 966
FORECASTER...RWH
REQUESTED BY...NATHAN STEPHENS
TYPE OF REQUEST...PRESCRIBED
.TAG 2607504.0/GSP
.DELDT 03/24/26
.FORMATTERVERSION 2.0.0
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