910
FNUS72 KCHS 220916
FWSCHS
SPOT FORECAST FOR HORSE ISLAND WILDFIRE...USFS
NATIONAL WEATHER SERVICE CHARLESTON SC
516 AM EDT WED JUL 22 2026
FORECAST IS BASED ON FORECAST START TIME OF 0600 EDT ON JULY 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
MOSTLY DRY AND HOT CONDITIONS WILL PERSIST AGAIN TODAY,
ALTHOUGH THERE IS A RISK FOR AN ISOLATED SHOWER OR THUNDERSTORM
DURING THE LATE MORNING INTO EARLY AFTERNOON HOURS ROUGHLY
BETWEEN 9 AM AND NOON. THE INCREASING RAIN CHANCES NOW LOOK TO
COME ON FRIDAY AS THE FRONT HAS SLOWED DOWN A BIT. AFTERNOON
RELATIVE HUMIDITY VALUES WILL BE GENERALLY AROUND 45 TO 50 PERCENT
THIS AFTERNOON AND THURSDAY AFTERNOON. THE BIGGEST CONCERNS WILL
BE THE SEABREEZE ONCE AGAIN THIS AFTERNOON WHICH WILL LIKELY
REACH THE BURN SITE AROUND NOON. WIND GUSTS TO AROUND 20 MPH WILL
BE POSSIBLE BEHIND THE SEABREEZE MOSTLY OUT OF THE SOUTH;
HOWEVER, STRONGER GUSTS COULD BE MORE VARIABLE. TRANSPORT WINDS
WILL BE PREDOMINANTLY SOUTHWESTERLY BECOMING MORE SOUTHERLY BY THE
LATE AFTERNOON. WINDS SHOULD QUICKLY RELAX AROUND SUNSET AS MORE
STABLE CONIDITONS SETTLE IN OVERNIGHT WITH CONTINUED DENSE SMOKE
ISSUES POSSIBLE.
TODAY
SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY SUNNY. SMOKE
EARLY IN THE MORNING. SLIGHT CHANCE OF SHOWERS
AND THUNDERSTORMS IN THE LATE MORNING AND EARLY
AFTERNOON.
CHANCE OF PCPN......20 PERCENT.
MAX TEMPERATURE.....AROUND 94.
MIN HUMIDITY........54 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 11 MPH WITH GUSTS TO
AROUND 20 MPH. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS IN THE LATE MORNING AND
EARLY AFTERNOON.
MIXING HEIGHT.......MAX 4800 FT AGL.
TRANSPORT WINDS.....SOUTHWEST AROUND 6 MPH INCREASING TO 18 TO 20
MPH IN THE LATE MORNING AND AFTERNOON.
MAX ADI.............81.
INVERSION END.......0900
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........41 28 50 48 46 59 70 61 52 53 53 50
WEATHER TYPE....SMK SMK SMK RW RW RW RW RW
TSTM COV........ SCH SCH SCH SCH SCH
CHC OF PCPN (%).10 10 10 20 20 20 20 20 0 0 0 0
TEMP............82 80 82 84 88 89 91 92 93 93 92 93
RH..............82 88 85 82 72 70 64 60 56 54 56 54
20 FT WIND DIR..SW SW SW SW SW S S S S S S S
20 FT WIND SPD..5 5 6 7 7 8 10 10 10 10 11 11
20 FT WIND GUST.14 14 18 16 16 16 18 20 18 20 20 20
MIX HGT (KFT)...0.5 0.5 0.8 3.0 3.6 3.9 4.3 4.5 4.7 4.8 4.3 4.0
TRANSP WIND DIR.SW SW SW SW SW SW SW SW SW SW SW SW
TRANSP WIND SPD.6 6 6 18 18 18 18 18 18 20 20 20
LVORI...........4 5 4 3 3 3 1 1 1 1 1 1
ADI.............6 6 7 69 81 68 53 54 58 79 76 77
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
CHANCE OF PCPN......0 PERCENT.
MIN TEMPERATURE.....AROUND 79.
MAX HUMIDITY........91 PERCENT.
WIND (20 FT)........SOUTH WINDS 5 TO 9 MPH IN THE EVENING AND
OVERNIGHT BECOMING LIGHT. GUSTS UP TO 22 MPH.
MAX LVORI...........5.
MIN ADI.............1.
INVERSION BEGIN.....2000
TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........55 51 30 19 36 29
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
CHC OF PCPN (%).0 0 0 0 0 0
TEMP............91 88 82 82 82 81
RH..............58 66 82 82 82 85
20 FT WIND......S 9 S 7 S 6 S 5 S 4 S 4
20 FT WIND GUST.20 18 18 16 16 16
MIX HGT (FT)....3300 800 500 500 500 500
TRANSPORT WIND..S 16 S 16 S 8 S 6 S 6 SW 4
LVORI...........3 3 5 5 5 5
ADI.............1 7 3 3 2 2
THURSDAY
SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY SUNNY. SLIGHT
CHANCE OF SHOWERS AND THUNDERSTORMS LATE IN THE
AFTERNOON.
CHANCE OF PCPN......20 PERCENT.
MAX TEMPERATURE.....AROUND 96.
MIN HUMIDITY........49 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH 5 TO 6 MPH IN THE
AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS LATE IN THE AFTERNOON.
MIXING HEIGHT.......MAX 6600 FT AGL.
TRANSPORT WINDS.....LIGHT WINDS BECOMING SOUTHWEST AROUND 12 MPH IN
THE LATE MORNING AND AFTERNOON.
MAX ADI.............91.
INVERSION END.......0900
TIME (EDT) 6 AM 9 AM NOON 3 PM
SKY (%).........48 33 58 43
WEATHER TYPE....NONE NONE NONE RNSHWR
TSTM COV........ S CHC
CHC OF PCPN (%).0 0 0 20
TEMP............81 84 92 95
RH..............85 82 56 49
20 FT WIND......SW 3G13 SW 3G11 SW 4G13 S 5G13
MIX HGT (FT)....400 2300 4700 6600
TRANSPORT WIND..SW 4 SW 12 SW 12 SW 12
LVORI...........5 3 1 1
ADI.............4 38 70 91
FORECASTER...BLACK
REQUESTED BY...MICHAEL LESLIE
TYPE OF REQUEST...WILDFIRE
.TAG 2617817.1/CHS
.DELDT 07/22/26
.FORMATTERVERSION 2.0.0
.EMAIL MICHAEL.C.LESLIE@USDA.GOV
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