638
FNUS72 KGSP 201233
FWSGSP
SPOT FORECAST FOR OLD HWY 105...USFS
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
833 AM EDT WED MAY 20 2026
FORECAST IS BASED ON FORECAST START TIME OF 0900 EDT ON MAY 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WARM AND MAINLY DRY CONDITIONS TODAY WITH MINIMUM RELATIVE
HUMIDITY VALUES EXPECTED TO FALL INTO THE 35-45% RANGE. A COUPLE
ISOLATED SHOWERS CANNOT BE COMPLETELY RULED OUT THIS AFTERNOON. A
COOLER AND WETTER PATTERN RETURNS THURSDAY AND PERSISTS THROUGH
THE WEEKEND AND INTO EARLY NEXT WEEK. HUMIDITY VALUES WILL BE MUCH
HIGHER ALONG WITH DAILY CHANCES FOR SHOWERS AND THUNDERSTORMS
ALONG WITH NOTICEABLY COOLER TEMPERATURES AND MORE WIDESPREAD AND
PERSISTENT CLOUD COVER. RAIN CHANCES OVER THE NEXT 10 DAYS ARE
HIGH AND CONFIDENCE IN 0.25" OF RAIN IN THE NEXT 72 HOUR IS ALSO
MODERATE TO HIGH.
REST OF TODAY
SKY/WEATHER.........SUNNY (15-25 PERCENT) THEN BECOMING PARTLY
SUNNY (45-55 PERCENT). SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS EARLY IN THE AFTERNOON.
CHANCE OF SHOWERS AND THUNDERSTORMS LATE IN THE
AFTERNOON.
CHANCE OF THUNDER...30 PERCENT.
MAX TEMPERATURE.....AROUND 82.
MIN HUMIDITY........39 PERCENT.
WIND (20 FT)........LIGHT WINDS. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS LATE IN THE AFTERNOON.
MIXING HEIGHT.......7700 FT AGL.
TRANSPORT WINDS.....WEST AROUND 6 MPH SHIFTING TO THE SOUTHWEST 7
TO 13 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (8171 MPH-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (79064 MPH-FT) IN THE
AFTERNOON.
LVORI...............2.
ADI.................11 EARLY IN THE MORNING INCREASING TO 96 IN THE
AFTERNOON.
STABILITY CLASS.....1.
PCPN AMOUNT.........0.02 INCHES.
CEILING (FT)........23100 DECREASING TO 5900 LATE IN THE AFTERNOON.
VISIBILITY (SM).....9.
SFC PRESSURE (IN)...27.8.
TIME (EDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........3 1 1 4 8 38 40 54 50
WEATHER COV..... SCH SCH CHC CHC
WEATHER TYPE.... RW RW RW RW
TSTM COV........ SCH SCH CHC CHC
CHC OF THDR (%).0 0 0 0 10 20 20 30 30
TEMP............73 76 78 80 81 81 82 81 80
DEWPOINT........55 55 55 54 54 54 56 56 57
RH..............54 49 45 41 40 39 41 43 45
20 FT WIND DIR..W W SW SW S S S SW SW
20 FT WIND SPD..2 2 2 2 2 3 3 3 3
20 FT WIND GUST.6 6 7 7 8 9 9 9 10
MIX HGT (KFT)...1.4 3.4 4.8 6.1 7.1 7.7 7.5 7.2 6.2
TRANSP WIND DIR.W W SW SW SW SW SW SW SW
TRANSP WIND SPD.6 6 6 7 8 8 10 10 13
LVORI...........2 2 1 1 1 1 1 1 1
ADI.............11 25 34 51 69 73 91 88 96
VRATE MPH-FT/1K.8 20 28 42 58 62 77 74 79
CEILING (HFT)...239 240 231 250 250 250 250 250 59
VISIBILITY (SM).9 9 9 9 9 9 9 9 9
SFC PRES (IN)...793 793 792 790 788 785 783 781 780
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) THEN BECOMING
MOSTLY CLOUDY (55-65 PERCENT). SLIGHT CHANCE OF
THUNDERSTORMS EARLY IN THE EVENING. SLIGHT
CHANCE OF SHOWERS EARLY IN THE EVENING.
CHANCE OF THUNDER...20 PERCENT.
MIN TEMPERATURE.....AROUND 66.
MAX HUMIDITY........76 PERCENT.
WIND (20 FT)........LIGHT WINDS EARLY IN THE EVENING BECOMING
SOUTHWEST AROUND 5 MPH, THEN SHIFTING TO THE
NORTHWEST 5 TO 6 MPH IN THE LATE EVENING AND
OVERNIGHT BECOMING LIGHT. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS EARLY IN THE
EVENING.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 9 TO 13 MPH SHIFTING TO THE NORTHWEST
5 TO 10 MPH IN THE LATE EVENING AND OVERNIGHT.
SMOKE DISPERSAL.....EXCELLENT (60190 MPH-FT) EARLY IN THE EVENING
DECREASING TO POOR (1956 MPH-FT) LATE IN THE
NIGHT.
LVORI...............3.
ADI.................75 EARLY IN THE EVENING DECREASING TO 2 LATE IN
THE NIGHT.
STABILITY CLASS.....3.
PCPN AMOUNT.........0.01 INCHES.
CEILING (FT)........5600 INCREASING TO 17100 EARLY IN THE EVENING,
THEN DECREASING TO 8800 IN THE LATE EVENING AND
OVERNIGHT.
VISIBILITY (SM).....8.
SFC PRESSURE (IN)...27.8.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........45 36 43 57 49 44 62 54 70 69 53 55
WEATHER COV.....SCH SCH SCH SCH
WEATHER TYPE....RW RW RW RW
TSTM COV........SCH SCH SCH
CHC OF THDR (%).20 20 20 10 10 10 10 10 10 0 10 0
TEMP............79 77 74 74 73 71 70 69 68 68 67 67
DEWPOINT........57 58 59 59 59 61 61 60 60 59 59 59
RH..............47 51 59 59 61 69 73 75 76 75 76 75
20 FT WIND DIR..S SW SW NW NW NW NW NW W NW N S
20 FT WIND SPD..3 5 5 6 6 6 5 5 5 3 2 2
20 FT WIND GUST.10 10 10 10 10 9 8 8 7 7 6 6
MIX HGT (KFT)...4.8 2.2 0.6 0.5 0.5 0.5 0.4 0.5 0.5 0.4 0.4 0.4
TRANSP WIND DIR.SW SW SW W NW NW NW NW NW NW NW NW
TRANSP WIND SPD.13 10 9 9 10 10 10 8 7 6 5 5
LVORI...........1 2 3 3 3 3 3 4 4 4 4 4
ADI.............75 5 4 6 7 7 7 5 5 3 2 2
VRATE MPH-FT/1K.60 23 6 4 5 5 5 4 3 3 2 2
CEILING (HFT)...58 56 200 171 125 109 105 101 97 94 91 88
VISIBILITY (SM).9 9 9 9 9 9 9 9 9 9 8 8
SFC PRES (IN)...780 782 783 784 785 785 785 784 784 784 784 784
THURSDAY
SKY/WEATHER.........PARTLY SUNNY (50-60 PERCENT) THEN BECOMING
CLOUDY (90-100 PERCENT). CHANCE OF SHOWERS AND
THUNDERSTORMS IN THE MORNING, THEN SHOWERS AND
THUNDERSTORMS IN THE AFTERNOON.
CHANCE OF THUNDER...90 PERCENT.
MAX TEMPERATURE.....AROUND 76.
MIN HUMIDITY........61 PERCENT.
WIND (20 FT)........LIGHT WINDS. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS IN THE LATE MORNING AND
AFTERNOON.
MIXING HEIGHT.......4200 FT AGL.
TRANSPORT WINDS.....NORTH 5 TO 6 MPH SHIFTING TO THE EAST 5 TO 7
MPH LATE IN THE MORNING, THEN SHIFTING TO THE
SOUTH 7 TO 8 MPH LATE IN THE MORNING SHIFTING
TO THE NORTHWEST 8 TO 9 MPH LATE IN THE
AFTERNOON.
SMOKE DISPERSAL.....POOR (1956 MPH-FT) EARLY IN THE MORNING
INCREASING TO GOOD (33950 MPH-FT) IN THE
AFTERNOON.
LVORI...............3.
ADI.................3 TO 40.
STABILITY CLASS.....3.
PCPN AMOUNT.........0.18 INCHES.
CEILING (FT)........8000 DECREASING TO 2800 IN THE LATE MORNING AND
AFTERNOON.
VISIBILITY (SM).....8.
SFC PRESSURE (IN)...27.83.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........54 65 43 53 52 54 65 68 90 94 95 98
WEATHER COV..... SCH CHC SCH CHC DEF DEF DEF LKY
WEATHER TYPE.... RW RW RW RW RW RW RW RW
TSTM COV........ SCH CHC SCH CHC DEF DEF DEF LKY
CHC OF THDR (%).0 0 0 10 20 30 20 50 80 90 90 60
TEMP............67 67 69 71 71 73 75 74 75 73 72 71
DEWPOINT........58 59 59 60 60 60 61 61 62 64 64 64
RH..............75 75 72 69 69 64 61 63 64 73 77 78
20 FT WIND DIR..N N N E SE SE SE S S SW W N
20 FT WIND SPD..1 1 0 1 2 2 2 2 2 2 1 1
20 FT WIND GUST.5 3 3 5 6 7 7 7 7 8 7 7
MIX HGT (KFT)...0.4 0.4 0.6 1.7 2.3 3.3 3.9 4.2 2.7 0.7 0.6 1.4
TRANSP WIND DIR.NW N N E E SE SE S S W NW NW
TRANSP WIND SPD.6 5 5 5 7 7 7 8 7 9 8 8
LVORI...........4 4 3 3 3 2 1 1 2 3 4 4
ADI.............3 4 4 10 20 28 33 40 23 10 8 15
VRATE MPH-FT/1K.3 2 3 8 16 23 27 34 18 7 5 12
CEILING (HFT)...85 82 80 82 37 36 34 32 31 29 29 28
VISIBILITY (SM).8 8 8 8 8 9 9 9 9 9 9 9
SFC PRES (IN)...785 786 787 788 788 788 787 786 785 784 783 783
FORECASTER...TBW
REQUESTED BY...ALAN HUSKINS
TYPE OF REQUEST...WILDFIRE
.TAG 2614103.0/GSP
.DELDT 05/20/26
.FORMATTERVERSION 2.0.0
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