971
FNUS72 KGSP 280735
FWSGSP
SPOT FORECAST FOR TWENTYMILE WF...NPS
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
335 AM EDT SAT MAR 28 2026
FORECAST IS BASED ON FORECAST START TIME OF 0600 EDT ON MARCH 28.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
...RED FLAG WARNING IN EFFECT FROM 8 AM THIS MORNING TO 11 PM EDT
THIS EVENING...
DISCUSSION
GUSTY N/NE WINDS NEAR THE WILDFIRE SITE THROUGH THIS MORNING.
GUSTS UP TO 25 MPH EXPECTED BEFORE DIMINISHING AFTER 2PM. VERY
LOW RH FORECASTED TO BY AROUND 19%, BUT COULD DROP LOWER WITH
AFTERNOON MIXING. NO RAIN. SUNDAY HAS SLIGHT IMPROVEMENT OF
RH VALUES RISING TO 20%. WINDS ARE LIGHTER, GUSTS UP TO 15 MPH
AND TURN SOUTH.
TODAY
SKY/WEATHER.........SUNNY (5-15 PERCENT).
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 62.
MIN HUMIDITY........19 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 6 TO 10 MPH. GUSTS UP TO 25 MPH
IN THE MORNING AND EARLY AFTERNOON.
MIXING HEIGHT.......4300 FT AGL.
TRANSPORT WINDS.....NORTHEAST 15 TO 23 MPH SHIFTING TO THE EAST
AROUND 14 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR (28426 MPH-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (75612 MPH-FT) IN THE
AFTERNOON.
LVORI...............3.
ADI.................12 EARLY IN THE MORNING INCREASING TO 92 IN THE
AFTERNOON.
STABILITY CLASS.....3.
PCPN AMOUNT.........0.00 INCHES.
CEILING (FT)........20500.
VISIBILITY (SM).....9.
SFC PRESSURE (IN)...27.76.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........20 13 5 2 1 3 1 2 4 3 4 3
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............34 33 33 34 39 44 50 55 58 59 61 61
DEWPOINT........29 26 24 22 21 19 17 17 18 19 19 19
RH..............81 73 71 60 48 36 27 23 21 21 20 19
20 FT WIND DIR..N N N N NE NE NE NE NE NE NE NE
20 FT WIND SPD..10 10 10 10 10 9 9 8 8 7 7 6
20 FT WIND GUST.25 25 25 24 23 22 21 20 18 17 16 15
MIX HGT (KFT)...2.1 1.8 1.6 2.4 2.6 2.8 3.2 3.5 3.8 4.0 4.3 4.3
TRANSP WIND DIR.N N N N N N NE NE NE NE NE E
TRANSP WIND SPD.18 18 17 21 23 21 22 22 20 18 15 14
LVORI...........4 3 3 1 1 1 1 1 1 1 1 1
ADI.............12 41 36 58 68 63 73 92 89 88 76 70
VRATE MPH-FT/1K.38 32 28 50 60 57 71 76 74 74 64 59
CEILING (HFT)...205 233 248 249 249 249 249 250 250 250 250 250
VISIBILITY (SM).9 9 9 9 9 9 9 9 9 9 9 9
SFC PRES (IN)...778 779 781 783 784 785 785 784 782 780 778 776
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (0-10 PERCENT).
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....AROUND 36.
MAX HUMIDITY........54 PERCENT.
WIND (20 FT)........NORTHEAST WINDS AROUND 5 MPH EARLY IN THE
EVENING BECOMING LIGHT, THEN BECOMING EAST 5 TO
7 MPH OVERNIGHT.
MIXING HEIGHT.......1400 FT AGL.
TRANSPORT WINDS.....EAST 6 TO 14 MPH.
SMOKE DISPERSAL.....GOOD (40625 MPH-FT) EARLY IN THE EVENING
DECREASING TO POOR (7941 MPH-FT) LATE IN THE
NIGHT.
LVORI...............2.
ADI.................49 EARLY IN THE EVENING DECREASING TO 3 LATE IN
THE NIGHT.
STABILITY CLASS.....4.
PCPN AMOUNT.........0.00 INCHES.
CEILING (FT)........25000.
VISIBILITY (SM).....9.
SFC PRESSURE (IN)...27.76.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........4 8 6 8 7 6 5 6 7 9 6 6
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............61 58 53 49 47 44 43 42 41 39 38 37
DEWPOINT........20 21 21 21 21 22 22 22 21 22 21 21
RH..............21 23 28 33 35 41 43 46 46 50 50 51
20 FT WIND DIR..NE NE NE E E E E E E E E E
20 FT WIND SPD..5 3 2 2 2 3 5 5 6 6 6 7
20 FT WIND GUST.14 13 10 10 10 12 12 13 13 14 15 15
MIX HGT (KFT)...3.5 2.1 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4 1.4
TRANSP WIND DIR.E E E E E E E E E E E E
TRANSP WIND SPD.12 8 6 8 9 12 13 13 14 14 14 14
LVORI...........1 2 2 2 2 2 2 2 2 2 2 2
ADI.............49 4 3 4 4 5 6 6 6 6 6 6
VRATE MPH-FT/1K.41 17 8 11 13 16 18 18 19 19 19 19
CEILING (HFT)...250 250 250 250 250 250 250 250 250 250 250 250
VISIBILITY (SM).9 9 9 9 9 9 9 9 9 9 9 9
SFC PRES (IN)...776 777 778 779 781 782 782 781 781 781 781 782
SUNDAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 68.
MIN HUMIDITY........20 PERCENT.
WIND (20 FT)........EAST WINDS AROUND 7 MPH SHIFTING TO THE SOUTH
IN THE AFTERNOON.
MIXING HEIGHT.......5000 FT AGL.
TRANSPORT WINDS.....SOUTHEAST 14 TO 18 MPH SHIFTING TO THE SOUTH 14
TO 16 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....FAIR (19449 MPH-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (75957 MPH-FT) IN THE
AFTERNOON.
LVORI...............2.
ADI.................7 EARLY IN THE MORNING INCREASING TO 89 IN THE
AFTERNOON.
STABILITY CLASS.....4.
PCPN AMOUNT.........0.00 INCHES.
CEILING (FT)........24300 INCREASING TO 30000 LATE IN THE MORNING.
VISIBILITY (SM).....9 EARLY IN THE MORNING.
SFC PRESSURE (IN)...27.76.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........7 9 8 5 6 7 11 16 21 22 22 23
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............36 36 36 39 45 51 57 62 65 67 68 67
DEWPOINT........21 21 21 22 22 22 23 22 22 24 26 29
RH..............53 53 54 50 41 31 27 21 20 20 21 24
20 FT WIND DIR..E E E E SE SE SE SE S S S S
20 FT WIND SPD..7 7 7 7 7 7 7 7 7 7 7 7
20 FT WIND GUST.15 15 16 16 16 16 16 16 15 16 16 16
MIX HGT (KFT)...1.4 1.4 1.4 2.2 2.7 3.1 3.7 4.2 4.6 4.9 5.0 4.7
TRANSP WIND DIR.E E E E SE SE SE S S S S S
TRANSP WIND SPD.15 14 14 15 17 18 17 15 14 15 15 16
LVORI...........2 2 2 1 1 1 1 1 1 1 1 1
ADI.............7 26 25 41 58 70 76 75 75 85 87 89
VRATE MPH-FT/1K.22 20 19 32 46 57 63 63 64 74 75 76
CEILING (HFT)...248 245 243 243 243 300 300 300 300 300 300 300
VISIBILITY (SM).9 9 9
SFC PRES (IN)...783 784 785 786 786 786 785 784 782 780 777 776
FORECASTER...CP
REQUESTED BY...MATT WOOD
TYPE OF REQUEST...WILDFIRE
.TAG 2607948.3/GSP
.DELDT 03/28/26
.FORMATTERVERSION 2.0.0
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