197
FNUS72 KGSP 210832
FWSGSP
SPOT FORECAST FOR C-28 BLOCK A...USFS
NATIONAL WEATHER SERVICE GREENVILLE-SPARTANBURG SC
432 AM EDT SAT MAR 21 2026
FORECAST IS BASED ON IGNITION TIME OF 0700 EDT ON MARCH 21.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
LIGHT BREEZE EXPECTED TODAY WITH A 4-6 KT WIND OUT OF THE W/SW. RH TO
FALL INTO THE MID 30S DURING PEAK HEATING, WITH VERY LIMITED POTENTIAL
FOR STRONGER DEWPOINT MIXING TO LOWER RH MORE THAN WHAT'S DEPICTED IN
THE FORECAST BELOW.
BIG STORY FOR THIS AFTERNOON WILL BE THE POTENTIAL FOR A CLUSTER OF
SHOWERS AND EMBEDDED THUNDER TO DEVELOP LATE THIS AFTERNOON. CAN'T
COMPLETELY RULE OUT A STRAY STRONG TO SEVERE THUNDERSTORM, CAPABLE OF
PRODUCING GUSTY WINDS AND LARGE HAIL, AS WELL AS CLOUD-TO-GROUND
LIGHTNING.
IF YOU HAVE QUESTIONS, REACH OUT TO THE OFFICE AND A METEOROLOGIST WILL
HAPPILY ASSIST YOU.
TODAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT). SLIGHT CHANCE OF
RAIN SHOWERS LATE IN THE AFTERNOON.
CHANCE OF THUNDER...10 PERCENT.
MAX TEMPERATURE.....AROUND 84.
MIN HUMIDITY........35 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS AROUND 5 MPH EARLY IN THE
MORNING BECOMING LIGHT.
MIXING HEIGHT.......5900 FT AGL.
TRANSPORT WINDS.....WEST 9 TO 13 MPH SHIFTING TO THE NORTHWEST 12
TO 14 MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (4373 MPH-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (81596 MPH-FT) IN THE
AFTERNOON.
LVORI...............2.
ADI.................8 EARLY IN THE MORNING INCREASING TO 91 IN THE
AFTERNOON.
STABILITY CLASS.....3.
PCPN AMOUNT.........0.08 INCHES.
CEILING (FT)........14300 INCREASING TO 19400 EARLY IN THE MORNING,
THEN DECREASING TO 11200 EARLY IN THE AFTERNOON
DECREASING TO 7700 LATE IN THE AFTERNOON.
VISIBILITY (SM).....10.
SFC PRESSURE (IN)...29.29.
TIME (EDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........59 62 68 57 42 30 19 28 22 28 33
WEATHER COV..... SCH
WEATHER TYPE.... RW
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 10 10 10 10
TEMP............57 56 59 66 71 76 80 82 83 84 83
DEWPOINT........46 47 49 51 53 53 54 54 53 53 54
RH..............66 73 70 59 52 45 40 38 36 35 36
20 FT WIND DIR..W SW W W W W W W W W W
20 FT WIND SPD..3 3 3 3 3 3 3 3 3 3 3
20 FT WIND GUST.13 12 12 12 10 10 10 10 10 12 12
MIX HGT (KFT)...0.5 0.5 0.6 1.0 1.4 2.5 4.0 5.0 5.8 5.9 4.8
TRANSP WIND DIR.W W W W W NW NW NW W W W
TRANSP WIND SPD.10 9 9 12 12 13 12 13 14 14 12
LVORI...........3 3 3 2 2 1 1 1 1 1 1
ADI.............11 10 10 15 20 40 55 74 90 91 64
VRATE MPH-FT/1K.5 4 6 12 16 32 46 64 80 82 55
CEILING (HFT)...146 220 206 197 194 112 151 124 94 94 77
VISIBILITY (SM).10 10 10 10 10 10 10 10 10 10 10
SFC PRES (IN)...936 937 938 939 939 938 936 934 932 930 929
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT). SLIGHT CHANCE OF
SHOWERS IN THE EVENING. SLIGHT CHANCE OF
THUNDERSTORMS EARLY IN THE EVENING.
CHANCE OF THUNDER...20 PERCENT.
MIN TEMPERATURE.....AROUND 58.
MAX HUMIDITY........94 PERCENT.
WIND (20 FT)........LIGHT WINDS. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS EARLY IN THE EVENING.
MIXING HEIGHT.......500 FT AGL.
TRANSPORT WINDS.....WEST 10 TO 12 MPH BECOMING 10 TO 13 MPH.
SMOKE DISPERSAL.....GOOD (43502 MPH-FT) EARLY IN THE EVENING
DECREASING TO POOR (3797 MPH-FT) LATE IN THE
NIGHT.
LVORI...............4.
ADI.................52 EARLY IN THE EVENING DECREASING TO 4 LATE IN
THE NIGHT.
STABILITY CLASS.....4.
PCPN AMOUNT.........0.12 INCHES.
CEILING (FT)........7500 INCREASING TO 9800 IN THE LATE EVENING AND
OVERNIGHT.
VISIBILITY (SM).....10.
SFC PRESSURE (IN)...29.29.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........42 44 48 48 39 37 31 12 24 26 13 20
WEATHER COV.....SCH SCH SCH SCH SCH SCH SCH
WEATHER TYPE....RW RW RW RW RW RW RW
TSTM COV........ SCH SCH SCH
CHC OF THDR (%).10 10 20 20 20 10 10 10 0 0 0 0
TEMP............82 79 73 70 68 67 65 64 63 63 62 60
DEWPOINT........53 55 56 57 58 58 58 58 58 57 57 57
RH..............37 44 56 63 70 73 78 81 82 83 85 89
20 FT WIND DIR..SW SW S SE S S SW SW SW SW W SW
20 FT WIND SPD..3 2 2 2 2 2 2 2 2 2 2 2
20 FT WIND GUST.10 8 8 8 8 8 8 8 9 8 8 8
MIX HGT (KFT)...3.8 0.7 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.W W S SW SW SW SW SW W W W W
TRANSP WIND SPD.12 10 13 10 9 8 10 9 10 12 13 12
LVORI...........1 2 3 3 3 3 4 5 4 5 5 6
ADI.............52 5 6 5 4 4 5 4 5 5 6 5
VRATE MPH-FT/1K.43 7 6 5 4 4 5 4 5 6 6 6
CEILING (HFT)...76 103 75 110 110 105 110 131 98 104 113 112
VISIBILITY (SM).10 10 10 10 10 10 10 10 10 10 10 10
SFC PRES (IN)...929 929 930 931 933 934 934 934 933 932 931 931
SUNDAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
CHANCE OF THUNDER...0 PERCENT.
MAX TEMPERATURE.....AROUND 88.
MIN HUMIDITY........29 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTHWEST 5 TO 9 MPH WITH
GUSTS TO AROUND 20 MPH IN THE AFTERNOON.
MIXING HEIGHT.......5800 FT AGL.
TRANSPORT WINDS.....WEST 10 TO 17 MPH INCREASING TO 21 TO 24 MPH
LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (5409 MPH-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (116352 MPH-FT) IN THE
AFTERNOON INCREASING TO EXCELLENT (131084
MPH-FT) LATE IN THE AFTERNOON.
LVORI...............4.
ADI.................5 EARLY IN THE MORNING INCREASING TO 131 IN THE
AFTERNOON.
STABILITY CLASS.....4.
PCPN AMOUNT.........0.00 INCHES.
CEILING (FT)........10900 INCREASING TO 18700 EARLY IN THE MORNING,
THEN DECREASING TO 12700 LATE IN THE MORNING
INCREASING TO 21500 LATE IN THE MORNING
INCREASING TO 30000.
VISIBILITY (SM).....10 IN THE MORNING AND EARLY AFTERNOON.
SFC PRESSURE (IN)...29.24.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........27 24 19 15 11 6 4 3 1 2 3 4
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............60 59 58 63 69 74 78 83 86 88 88 87
DEWPOINT........57 56 57 57 58 59 57 55 53 52 52 51
RH..............89 89 94 83 69 61 48 39 32 30 29 29
20 FT WIND DIR..SW W W W W W W SW SW SW SW SW
20 FT WIND SPD..2 2 2 2 3 3 5 6 7 8 9 9
20 FT WIND GUST.8 8 8 9 10 12 14 15 17 18 20 20
MIX HGT (KFT)...0.5 0.5 0.5 1.0 1.4 1.8 3.1 4.3 5.5 5.6 5.7 5.8
TRANSP WIND DIR.W W W W W W W W W W W W
TRANSP WIND SPD.12 12 12 10 10 10 12 15 17 21 23 24
LVORI...........6 5 5 4 3 2 1 1 1 1 1 1
ADI.............5 12 12 14 19 24 43 76 108 131 101 106
VRATE MPH-FT/1K.6 6 5 10 14 19 35 64 96 116 131 140
CEILING (HFT)...109 115 187 133 127 215 250 250 300 300 300 300
VISIBILITY (SM).10 10 10 10 10 10 10 10
SFC PRES (IN)...931 932 933 934 935 935 934 931 929 927 925 924
FORECASTER...MPR
REQUESTED BY...DROSE
TYPE OF REQUEST...PRESCRIBED
.TAG 2606865.0/GSP
.DELDT 03/21/26
.FORMATTERVERSION 2.0.0
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