529
FNUS72 KCHS 231045
FWSCHS
SPOT FORECAST FOR HORSE ISLAND WILDFIRE...USFS
NATIONAL WEATHER SERVICE CHARLESTON SC
645 AM EDT THU JUL 23 2026
FORECAST IS BASED ON FORECAST START TIME OF 0600 EDT ON JULY 23.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
MOSTLY DRY AND HOT CONDITIONS WILL PERSIST ONCE AGAIN TODAY. AN
ISOLATED SHOWER OR THUNDERSTORM COULD BE POSSIBLE BETWEEN 2 PM AND
5 PM. 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
AROUND 55 TO 60 PERCENT FRIDAY AFTERNOON. THE AFTERNOON SEABREEZE
IS NOT EXPECTED TO BE AS STRONG THIS AFTERNOON; HOWEVER, A SLIGHT
WIND SHIFT TO MORE SOUTHERLY WILL BE POSSIBLE AROUND 3 TO 4 PM.
TRANSPORT WINDS WILL BE PREDOMINANTLY SOUTHWESTERLY BECOMING MORE
SOUTHERLY BY THE LATE AFTERNOON. WINDS WILL BE MORE LIGHT AND
VARIABLE ON FRIDAY AS THE SLOW MOVING FRONTAL BOUNDARY MOVES
THROUGH THE AREA.
TODAY
SKY/WEATHER.........MOSTLY SUNNY. SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS EARLY IN THE AFTERNOON. CHANCE OF
SHOWERS AND THUNDERSTORMS LATE IN THE
AFTERNOON, THEN SLIGHT CHANCE OF SHOWERS AND
THUNDERSTORMS LATE IN THE AFTERNOON.
CHANCE OF PCPN......30 PERCENT.
MAX TEMPERATURE.....AROUND 95.
MIN HUMIDITY........51 PERCENT.
WIND (20 FT)........LIGHT WINDS BECOMING SOUTH AROUND 5 MPH LATE IN
THE AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS LATE IN THE AFTERNOON.
MIXING HEIGHT.......MAX 5400 FT AGL.
TRANSPORT WINDS.....LIGHT WINDS BECOMING SOUTHWEST 10 TO 12 MPH IN
THE LATE MORNING AND AFTERNOON.
MAX ADI.............58.
INVERSION END.......0900
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........15 20 18 33 47 58 58 53 53 58 65 68
WEATHER TYPE.... RW RW RW RW
TSTM COV........ SCH SCH CHC SCH
CHC OF PCPN (%).0 0 0 0 0 0 10 10 20 20 30 20
TEMP............81 79 81 84 88 89 91 93 93 93 94 92
RH..............85 91 91 85 70 68 60 54 52 52 51 56
20 FT WIND DIR..SW SW SW SW SW SW SW SW SW S S S
20 FT WIND SPD..3 3 3 3 3 3 4 4 4 4 4 5
20 FT WIND GUST.13 13 13 13 11 11 11 13 13 13 13 13
MIX HGT (KFT)...0.4 0.5 0.8 2.4 3.1 4.0 4.8 5.4 5.3 5.0 4.3 3.5
TRANSP WIND DIR.SW SW SW SW SW SW SW SW SW SW SW SW
TRANSP WIND SPD.4 4 4 12 12 12 10 10 10 12 12 12
LVORI...........5 6 6 4 3 1 1 1 1 1 1 1
ADI.............3 3 3 43 51 55 58 44 44 43 44 40
TONIGHT
SKY/WEATHER.........MOSTLY CLOUDY THEN BECOMING PARTLY CLOUDY.
SLIGHT CHANCE OF SHOWERS AND THUNDERSTORMS
EARLY IN THE EVENING.
CHANCE OF PCPN......20 PERCENT.
MIN TEMPERATURE.....AROUND 77.
MAX HUMIDITY........97 PERCENT.
WIND (20 FT)........SOUTH WINDS AROUND 5 MPH EARLY IN THE EVENING
BECOMING LIGHT. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS EARLY IN THE
EVENING.
MAX LVORI...........9.
MIN ADI.............1.
INVERSION BEGIN.....2000
TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........62 54 51 46 36 34
WEATHER TYPE....RNSHWR NONE NONE NONE NONE NONE
TSTM COV........S CHC
CHC OF PCPN (%).20 10 10 10 10 10
TEMP............90 85 81 81 81 78
RH..............62 77 88 88 88 97
20 FT WIND......S 5 S 4 S 3 S 2 S 1 S 1
20 FT WIND GUST.13 13 11 11 9 7
MIX HGT (FT)....2700 800 500 500 500 500
TRANSPORT WIND..S 10 S 10 S 4 S 2 S 2 S 0
LVORI...........3 4 6 6 6 9
ADI.............1 3 2 1 1 1
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING MOSTLY CLOUDY.
SHOWERS AND THUNDERSTORMS LIKELY IN THE
AFTERNOON.
CHANCE OF PCPN......60 PERCENT.
MAX TEMPERATURE.....AROUND 93.
MIN HUMIDITY........62 PERCENT.
WIND (20 FT)........LIGHT WINDS. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS IN THE AFTERNOON.
MIXING HEIGHT.......MAX 4900 FT AGL.
TRANSPORT WINDS.....LIGHT WINDS BECOMING SOUTHWEST 10 TO 12 MPH IN
THE LATE MORNING AND AFTERNOON.
MAX ADI.............52.
INVERSION END.......0900
TIME (EDT) 6 AM 9 AM NOON 3 PM
SKY (%).........35 42 50 58
WEATHER TYPE....NONE NONE NONE RNSHWR
TSTM COV........ LIKELY
CHC OF PCPN (%).10 10 10 60
TEMP............78 82 89 90
RH..............94 91 68 66
20 FT WIND......N 0G5 SW 1G7 SW 2G9 S 3G11
MIX HGT (FT)....400 2100 4500 2800
TRANSPORT WIND..N 0 SW 10 SW 10 S 12
LVORI...........8 4 1 3
ADI.............1 28 52 36
FORECASTER...BLACK
REQUESTED BY...MICHAEL LESLIE
TYPE OF REQUEST...WILDFIRE
.TAG 2617817.2/CHS
.DELDT 07/23/26
.FORMATTERVERSION 2.0.0
.EMAIL MICHAEL.C.LESLIE@USDA.GOV
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