421
FNUS72 KGSP 252348
FWSGSP
SPOT FORECAST FOR TWENTYMILE WF...NPS
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
748 PM EDT WED MAR 25 2026
FORECAST IS BASED ON FORECAST START TIME OF 2000 EDT ON MARCH 25.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
VERY WARM AND MOSTLY DRY CONDITIONS ARE EXPECTED THROUGH THE END OF
THE WEEK, WITH RAIN CHANCES LIMITED TO SCATTERED SHOWERS FRIDAY
AFTERNOON. MOISTURE IS EXPECTED TO GRADUALLY INCREASE THROUGH
FRIDAY, WITH MINIMUM AFTERNOON RELATIVE HUMIDITY EXPECTED MOSTLY IN
THE 40 TO 50 PERCENT RANGE, AND NIGHTTIME RECOVERY BETWEEN 80-90%.
WINDS WILL MOSTLY BE IN THE 5-10 MPH RANGE UNTIL FRIDAY, WHEN WINDS
WILL PICK UP OUT OF THE SOUTHWEST AND WEST AND BECOME GUSTY.
LOOKING AHEAD, MUCH DRIER CONDITIONS ARE EXPECTED OVER THE WEEKEND
BEHIND A COLD FRONT. CRITICAL AFTERNOON HUMIDITY IS POSSIBLE SATURDAY
AND SUNDAY, WITH GUSTY WINDS POSSIBLE SATURDAY, ESPECIALLY AT
RIDGETOP.
REST OF TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY (50-65 PERCENT).
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....AROUND 50.
MAX HUMIDITY........88 PERCENT.
WIND (20 FT)........LIGHT SOUTHWEST WINDS BECOMING EAST 5 TO 6 MPH OVERNIGHT.
MIXING HEIGHT.......1400 FT AGL.
TRANSPORT WINDS.....SOUTH 9 TO 12 MPH.
SMOKE DISPERSAL.....FAIR (13235 MPH-FT).
LVORI...............4.
ADI.................5 TO 8.
STABILITY CLASS.....5.
PCPN AMOUNT.........0.00 INCHES.
CEILING (FT)........20100 DECREASING TO 5700.
VISIBILITY (SM).....10.
SFC PRESSURE (IN)...27.58.
TIME (EDT) 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........54 49 48 53 52 56 61 67 65 70
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0
TEMP............64 61 57 55 54 53 52 51 51 51
DEWPOINT........44 43 43 43 44 44 45 45 46 46
RH..............47 53 60 64 67 72 76 79 83 84
20 FT WIND DIR..SW S SE E E E E E E E
20 FT WIND SPD..2 3 3 3 3 5 5 5 5 6
20 FT WIND GUST.12 12 12 12 12 12 13 12 12 13
MIX HGT (KFT)...1.5 1.6 1.5 1.5 1.5 1.5 1.4 1.4 1.4 1.4
TRANSP WIND DIR.S S S S S S S S S SE
TRANSP WIND SPD.10 10 12 12 12 12 12 12 10 9
LVORI...........2 2 3 3 3 3 4 4 4 5
ADI.............5 5 5 5 5 8 8 8 7 6
VRATE MPH-FT/1K.16 16 17 18 17 17 17 17 15 13
CEILING (HFT)...201 123 112 70 97 98 65 61 57 74
VISIBILITY (SM).10 10 10 10 10 10 10 10 10 10
SFC PRES (IN)...761 762 763 763 763 762 761 760 759 758
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY (35-45 PERCENT).
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 78.
MIN HUMIDITY........40 PERCENT.
WIND (20 FT)........EAST WINDS 6 TO 7 MPH SHIFTING TO THE SOUTHWEST
7 TO 8 MPH IN THE AFTERNOON.
MIXING HEIGHT.......5600 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 8 TO 12 MPH SHIFTING TO THE SOUTHWEST
12 TO 18 MPH IN THE LATE MORNING AND AFTERNOON.
SMOKE DISPERSAL.....FAIR (13004 MPH-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (103233 MPH-FT) IN THE
AFTERNOON.
LVORI...............3.
ADI.................8 EARLY IN THE MORNING INCREASING TO 117 IN THE
AFTERNOON.
STABILITY CLASS.....3.
PCPN AMOUNT.........0.00 INCHES.
CEILING (FT)........5500 INCREASING TO 8300 LATE IN THE AFTERNOON.
VISIBILITY (SM).....10.
SFC PRESSURE (IN)...27.52.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........66 64 65 60 54 49 44 39 33 28 32 9
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............50 50 51 53 58 64 69 72 76 77 78 78
DEWPOINT........46 47 47 49 52 54 56 57 57 56 54 53
RH..............86 87 88 86 82 71 63 59 52 48 43 42
20 FT WIND DIR..E E E E E SE S SW SW SW SW SW
20 FT WIND SPD..6 6 6 6 7 7 7 8 8 8 8 7
20 FT WIND GUST.13 13 13 15 15 16 17 18 18 18 18 18
MIX HGT (KFT)...1.5 1.4 1.4 1.6 2.3 3.2 4.1 4.6 5.1 5.3 5.6 5.3
TRANSP WIND DIR.SE SE SE S S SW SW SW SW W W W
TRANSP WIND SPD.12 9 10 8 12 14 16 15 16 17 18 17
LVORI...........5 4 4 4 3 3 1 1 1 1 1 1
ADI.............8 15 16 14 24 54 79 81 94 105 117 105
VRATE MPH-FT/1K.17 13 15 13 27 44 67 69 81 92 103 92
CEILING (HFT)...77 55 58 57 67 75 80 84 89 87 85 83
VISIBILITY (SM).10 10 10 10 10 10 10 10 10 10 10 10
SFC PRES (IN)...758 759 760 761 761 761 760 758 756 754 753 752
THURSDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR (15-25 PERCENT).
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....AROUND 57.
MAX HUMIDITY........89 PERCENT.
WIND (20 FT)........SOUTHWEST TO SOUTH WINDS 5 TO 7 MPH.
MIXING HEIGHT.......1400 FT AGL.
TRANSPORT WINDS.....SOUTH 9 TO 17 MPH.
SMOKE DISPERSAL.....EXCELLENT (78719 MPH-FT) EARLY IN THE EVENING
DECREASING TO FAIR (13235 MPH-FT) LATE IN THE
NIGHT.
LVORI...............3.
ADI.................92 EARLY IN THE EVENING DECREASING TO 4 LATE IN
THE NIGHT.
STABILITY CLASS.....4.
PCPN AMOUNT.........0.00 INCHES.
CEILING (FT)........17900 EARLY IN THE EVENING, DECREASING TO 6300
EARLY IN THE MORNING.
VISIBILITY (SM).....9 IN THE EVENING AND OVERNIGHT.
SFC PRESSURE (IN)...27.49.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........9 18 8 14 10 6 7 9 10 17 25 32
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............77 76 72 68 65 64 62 61 60 59 59 58
DEWPOINT........56 56 56 55 54 54 54 54 53 53 54 54
RH..............48 50 56 62 67 71 74 77 78 81 83 85
20 FT WIND DIR..SW SW S S S S S S S S S SW
20 FT WIND SPD..7 6 3 3 5 5 5 5 5 5 6 6
20 FT WIND GUST.17 16 14 14 14 14 14 14 14 14 14 15
MIX HGT (KFT)...4.6 2.1 1.4 1.4 1.5 1.5 1.5 1.5 1.4 1.4 1.4 1.4
TRANSP WIND DIR.SW S S S S S S S S SW SW SW
TRANSP WIND SPD.17 13 10 10 10 12 12 12 12 10 9 9
LVORI...........1 2 3 3 3 3 4 4 4 4 5 5
ADI.............92 6 5 5 5 5 5 5 5 5 4 4
VRATE MPH-FT/1K.79 26 15 15 15 17 17 17 17 15 13 13
CEILING (HFT)...115 147 179 179 179 300 300 300 300 300 300 63
VISIBILITY (SM).10 10 10 10 10 9 9 10
SFC PRES (IN)...752 753 753 753 752 752 752 751 751 750 749 749
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT). CHANCE OF RAIN
SHOWERS LATE IN THE AFTERNOON.
CHANCE OF THUNDER...10 PERCENT.
MAX TEMPERATURE.....AROUND 79.
MIN HUMIDITY........52 PERCENT.
WIND (20 FT)........SOUTHWEST TO WEST WINDS 6 TO 9 MPH WITH GUSTS TO
AROUND 22 MPH, MAINLY IN THE AFTERNOON.
MIXING HEIGHT.......5500 FT AGL.
TRANSPORT WINDS.....WEST 9 TO 18 MPH INCREASING TO 15 TO 22 MPH
LATE IN THE MORNING.
SMOKE DISPERSAL.....FAIR (13465 MPH-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (108181 MPH-FT) IN THE
AFTERNOON.
LVORI...............4.
ADI.................4 EARLY IN THE MORNING INCREASING TO 88 IN THE
AFTERNOON.
STABILITY CLASS.....4.
PCPN AMOUNT.........0.06 INCHES.
CEILING (FT)........6300 INCREASING TO 30000.
VISIBILITY (SM).....MISSING.
SFC PRESSURE (IN)...27.48.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........30 29 27 26 26 25 35 45 55 59 64 69
WEATHER COV..... CHC CHC CHC CHC
WEATHER TYPE.... RW RW RW RW
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 10 10 10 10
TEMP............57 57 58 61 66 70 73 76 77 78 77 76
DEWPOINT........54 54 55 56 57 58 59 59 59 59 58 58
RH..............88 89 87 81 73 66 61 56 53 52 52 54
20 FT WIND DIR..SW SW SW SW W W W W W W NW NW
20 FT WIND SPD..6 6 6 7 8 9 9 9 9 9 8 8
20 FT WIND GUST.15 15 15 17 20 21 21 21 21 21 21 22
MIX HGT (KFT)...1.5 1.5 1.5 2.5 3.4 4.3 4.7 5.1 5.5 5.1 4.7 4.2
TRANSP WIND DIR.SW SW W W W W W W W W W W
TRANSP WIND SPD.9 10 12 15 18 21 22 21 20 18 16 15
LVORI...........6 4 4 3 3 1 1 1 1 1 1 1
ADI.............4 20 23 46 77 80 88 87 84 77 88 75
VRATE MPH-FT/1K.13 15 17 37 63 90 104 106 108 94 75 64
CEILING (HFT)...63 63 63 63 63 208 208 208 300 300 300 300
VISIBILITY (SM).
SFC PRES (IN)...750 751 752 753 754 754 753 751 750 749 748 749
FORECASTER...JDL
REQUESTED BY...MATT WOOD
TYPE OF REQUEST...WILDFIRE
.TAG 2607948.0/GSP
.DELDT 03/25/26
.FORMATTERVERSION 2.0.0
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