332
FNUS72 KGSP 170741
FWSGSP
SPOT FORECAST FOR FLAT RATTLESNAKE (WILDFIRE)...USFS
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
341 AM EDT FRI APR 17 2026
FORECAST IS BASED ON FORECAST START TIME OF 0600 EDT ON APRIL 17.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WINDS FROM THE NORTHWEST 5 TO 8 MPH THROUGH THIS EVENING. EXCELLENT RH
RECOVERY OF 90-100% THIS MORNING, GIVING WAY TO ANOTHER VERY DRY AND
VERY WARM AFTERNOON. THIS AFTERNOON'S TEMPERATURE AND RH ARE EXPECTED
TO BE VERY SIMILAR TO THURSDAY. RH INCREASES A BIT FOR SATURDAY ALONG
WITH TEMPERATURES. SATURDAY WILL LIKELY BE THE HOTTEST DAY OF THE
WEEK. MINIMUM RH IS EXPECTED TO BE MORE IN THE 35-40% RANGE SATURDAY,
BUT WINDS WILL ALSO PICK UP FROM THE S AND SW, WITH GUSTS OF 21-26 MPH
EXPECTED FROM LATE MORNING THROUGH THE AFTERNOON.
TODAY
SKY/WEATHER.........SUNNY (15-25 PERCENT).
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 77.
MIN HUMIDITY........26-30 PERCENT.
WIND (20 FT)........NORTHWEST WINDS 5 TO 8 MPH.
MIXING HEIGHT.......6100 FT AGL.
TRANSPORT WINDS.....NORTHWEST 9 TO 13 MPH SHIFTING TO THE WEST
AROUND 9 MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (0 MPH-FT) EARLY IN THE MORNING INCREASING
TO GOOD (58234 MPH-FT) IN THE AFTERNOON.
LVORI...............4.
ADI.................5 EARLY IN THE MORNING INCREASING TO 72 IN THE
AFTERNOON.
STABILITY CLASS.....3.
PCPN AMOUNT.........0.00 INCHES.
CEILING (FT)........22600.
VISIBILITY (SM).....9.
SFC PRESSURE (IN)...27.09.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........15 16 11 8 16 20 31 21 13 9 9 10
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............54 54 56 60 64 68 71 74 75 77 77 77
DEWPOINT........52 51 51 52 51 50 48 46 43 42 41 42
RH..............91 92 84 75 62 52 45 37 32 29 27 29
20 FT WIND DIR..NW NW N NW NW NW NW NW NW NW NW NW
20 FT WIND SPD..8 8 7 7 7 7 6 7 7 7 7 7
20 FT WIND GUST.14 14 14 13 12 13 13 13 13 13 13 13
MIX HGT (KFT)...0.1 0.1 0.1 0.7 1.4 2.6 3.6 4.7 5.4 5.6 6.1 5.8
TRANSP WIND DIR.N NW N N N NW NW NW NW NW NW W
TRANSP WIND SPD.10 9 9 10 13 12 12 9 9 10 9 9
LVORI...........6 6 4 4 2 1 1 1 1 1 1 1
ADI.............5 9 9 10 23 38 53 54 62 72 68 66
VRATE MPH-FT/1K.0 0 0 7 18 30 41 43 50 58 56 53
CEILING (HFT)...241 242 243 249 250 250 250 247 233 233 231 226
VISIBILITY (SM).9 9 9 9 9 9 9 9 9 9 9 9
SFC PRES (IN)...713 714 716 718 719 719 718 716 714 712 710 709
TONIGHT
SKY/WEATHER.........MOSTLY CLEAR (10-20 PERCENT).
CHANCE OF THUNDER...0 PERCENT.
MIN TEMPERATURE.....AROUND 56.
MAX HUMIDITY........76 PERCENT.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......0 FT AGL.
TRANSPORT WINDS.....WEST 5 TO 8 MPH SHIFTING TO THE SOUTHWEST 3 TO
6 MPH OVERNIGHT.
SMOKE DISPERSAL.....GOOD (38784 MPH-FT) EARLY IN THE EVENING
DECREASING TO POOR (0 MPH-FT) LATE IN THE
NIGHT.
LVORI...............2.
ADI.................48 EARLY IN THE EVENING DECREASING TO 2 LATE IN
THE NIGHT.
STABILITY CLASS.....4.
PCPN AMOUNT.........0.00 INCHES.
CEILING (FT)........18500 DECREASING TO 16700 OVERNIGHT.
VISIBILITY (SM).....8.
SFC PRESSURE (IN)...27.09.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........8 11 14 18 14 16 19 17 9 20 22 17
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............75 71 66 62 61 60 59 59 57 57 56 56
DEWPOINT........43 45 46 47 47 47 47 47 47 47 47 47
RH..............32 40 49 57 61 64 64 65 69 68 70 72
20 FT WIND DIR..NW NW NW N N NE SE SW SW S S S
20 FT WIND SPD..3 3 3 3 3 3 3 3 3 3 3 3
20 FT WIND GUST.12 10 9 8 8 8 8 8 8 8 8 8
MIX HGT (KFT)...4.8 2.7 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1
TRANSP WIND DIR.NW W W NW W W SW SW SW SW S S
TRANSP WIND SPD.8 7 7 6 5 5 3 5 5 6 6 6
LVORI...........1 2 2 3 3 3 3 3 3 3 3 3
ADI.............48 3 3 3 2 2 2 2 2 3 3 3
VRATE MPH-FT/1K.39 19 0 0 0 0 0 0 0 0 0 0
CEILING (HFT)...226 227 215 222 222 222 204 185 167 180 193 206
VISIBILITY (SM).9 9 9 9 9 9 9 9 9 9 8 8
SFC PRES (IN)...709 710 711 712 712 712 712 711 710 709 709 709
SATURDAY
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT).
CHANCE OF THUNDER...10 PERCENT.
MAX TEMPERATURE.....AROUND 78.
MIN HUMIDITY........38 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHWEST 5 TO 10 MPH WITH
GUSTS 21-26 MPH IN THE LATE MORNING AND
AFTERNOON.
MIXING HEIGHT.......5900 FT AGL.
TRANSPORT WINDS.....SOUTH 7 TO 15 MPH SHIFTING TO THE SOUTHWEST 17
TO 18 MPH LATE IN THE MORNING.
SMOKE DISPERSAL.....POOR (0 MPH-FT) EARLY IN THE MORNING INCREASING
TO EXCELLENT (101621 MPH-FT) IN THE AFTERNOON.
LVORI...............3.
ADI.................3 EARLY IN THE MORNING INCREASING TO 105 IN THE
AFTERNOON.
STABILITY CLASS.....4.
PCPN AMOUNT.........0.00 INCHES.
CEILING (FT)........11500 INCREASING TO 30000 LATE IN THE AFTERNOON.
VISIBILITY (SM).....9 IN THE MORNING AND EARLY AFTERNOON.
SFC PRESSURE (IN)...27.02.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........25 21 13 33 33 37 42 47 52 53 54 55
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 10 10 10 10
TEMP............56 56 59 64 68 72 74 76 77 78 77 76
DEWPOINT........48 48 50 50 51 51 52 51 51 50 50 49
RH..............73 76 71 61 53 49 46 42 40 38 38 39
20 FT WIND DIR..S S S S SW SW SW SW SW SW SW SW
20 FT WIND SPD..3 3 3 5 6 7 8 9 10 10 9 9
20 FT WIND GUST.8 9 9 13 17 21 24 26 26 26 26 24
MIX HGT (KFT)...0.1 0.1 0.1 1.4 2.6 3.7 4.6 5.1 5.5 5.8 5.9 5.4
TRANSP WIND DIR.S S S S SW SW SW SW SW SW SW SW
TRANSP WIND SPD.7 7 8 12 15 17 18 17 17 17 17 17
LVORI...........3 4 3 2 1 1 1 1 1 1 1 1
ADI.............3 7 8 21 49 77 98 102 74 76 77 105
VRATE MPH-FT/1K.0 0 0 16 38 64 84 89 94 101 102 93
CEILING (HFT)...183 161 138 135 133 130 125 120 115 115 115 300
VISIBILITY (SM).9 9 9 9 9 9 9 9 9
SFC PRES (IN)...709 710 711 712 712 712 711 709 707 705 703 702
FORECASTER...JDL
REQUESTED BY...IC-DEWHERST
TYPE OF REQUEST...WILDFIRE
.TAG 2610594.0/GSP
.DELDT 04/17/26
.FORMATTERVERSION 2.0.0
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