856
FNUS72 KCHS 211748
FWSCHS
SPOT FORECAST FOR FMF 204B PLANNING...USDA FOREST SERVICE
NATIONAL WEATHER SERVICE CHARLESTON SC
148 PM EDT WED OCT 21 2026
FORECAST IS BASED ON IGNITION TIME OF 0900 EDT ON OCTOBER 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
DRY HIGH PRESSURE WILL PREVAIL ACROSS THE AREA THROUGH THIS
WEEKEND AND INTO EARLY NEXT WEEK. RELATIVE HUMIDITY VALUES COULD
GET AS LOW AS 30 PERCENT THURSDAY AFTERNOON. WINDS WILL MOSTLY BE
OUT OF THE NORTH ON THURSDAY, THOUGH A WEAK SEA BREEZE COULD
REACH THE SITE BY THE EARLY EVENING HOURS. FOG IS NOT EXPECTED
TO BE AN ISSUE THURSDAY NIGHT AND FRIDAY MORNING. WINDS WILL
LIKELY GO CALM THURSDAY NIGHT, BUT BEGIN TO PICK UP BY SUNRISE
FRIDAY.
THURSDAY
SKY/WEATHER.........SUNNY.
CHANCE OF PCPN......0 PERCENT.
MAX TEMPERATURE.....AROUND 73.
MIN HUMIDITY........36 PERCENT.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......MAX 3900 FT AGL.
TRANSPORT WINDS.....NORTH 6 TO 10 MPH.
MAX ADI.............48.
INVERSION END.......1000.
TIME (EDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........0 1 1 2 2 2 2 2 3
WEATHER TYPE....
TSTM COV........
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0
TEMP............50 58 64 67 70 71 72 73 71
RH..............83 67 56 47 39 36 37 37 41
20 FT WIND DIR..N N N N N N N N N
20 FT WIND SPD..2 2 3 2 2 2 2 1 0
20 FT WIND GUST.9 9 9 9 9 9 9 7 7
MIX HGT (KFT)...0.5 0.9 1.7 2.5 3.2 3.7 3.9 3.7 3.0
TRANSP WIND DIR.N N N N N N N N N
TRANSP WIND SPD.6 6 6 10 10 10 10 10 10
LVORI...........5 3 2 1 1 1 1 1 2
ADI.............4 4 22 32 41 46 48 41 30
THURSDAY NIGHT
SKY/WEATHER.........CLEAR.
CHANCE OF PCPN......0 PERCENT.
MIN TEMPERATURE.....AROUND 48.
MAX HUMIDITY........89 PERCENT.
WIND (20 FT)........LIGHT WINDS.
MAX LVORI...........7.
MIN ADI.............1.
INVERSION BEGIN.....1900.
TIME (EDT) 6 PM 9 PM MIDNGT 3 AM
SKY (%).........4 2 1 1
WEATHER TYPE....NONE NONE NONE NONE
TSTM COV........
CHC OF PCPN (%).0 0 0 0
TEMP............68 59 55 51
RH..............51 69 80 89
20 FT WIND......N 0G5 N 0G4 N 0G4 N 2G11
MIX HGT (FT)....1300 500 400 500
TRANSPORT WIND..N 2 N 0 N 2 N 4
LVORI...........2 4 6 7
ADI.............1 1 1 2
FRIDAY
SKY/WEATHER.........SUNNY.
CHANCE OF PCPN......0 PERCENT.
MAX TEMPERATURE.....AROUND 70.
MIN HUMIDITY........49 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING NORTHEAST 5 TO 6 MPH WITH
GUSTS TO AROUND 16 MPH IN THE LATE MORNING AND
AFTERNOON.
MIXING HEIGHT.......MAX 3900 FT AGL.
TRANSPORT WINDS.....NORTHEAST 6 TO 14 MPH.
MAX ADI.............64.
INVERSION END.......1000.
TIME (EDT) 6 AM 10 AM 2 PM
SKY (%).........1 0 1
WEATHER TYPE....NONE NONE NONE
TSTM COV........
CHC OF PCPN (%).0 0 0
TEMP............48 56 68
RH..............86 64 49
20 FT WIND......N 3G13 NE 5G14 NE 5G13
MIX HGT (FT)....500 1600 3900
TRANSPORT WIND..N 6 NE 12 NE 14
LVORI...........5 2 1
ADI.............5 29 64
FORECASTER...HOLLOWAY
REQUESTED BY...KELLY WETZEL
TYPE OF REQUEST...PRESCRIBED
.TAG 2624226.0/CHS
.DELDT 10/21/26
.FORMATTERVERSION 2.0.0
.EMAIL KELLY.WETZELWILSON@USDA.GOV
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