117
FNUS73 KLMK 252301
FWSLMK
SPOT FORECAST FOR CHAUMONT RX...NPS
NATIONAL WEATHER SERVICE LOUISVILLE KY
701 PM EDT WED MAR 25 2026
FORECAST IS BASED ON IGNITION TIME OF 1900 EDT ON MARCH 25.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
TONIGHT, MILDER TEMPERATURES ARE EXPECTED WITH LOWS ONLY EXPECTED TO FALL
TO AROUND 60 THURSDAY MORNING. SCATTERED CLOUDS WITH CLOUD BASES BETWEEN
8-12K FT ARE EXPECTED OVERNIGHT, WITH LIGHT SOUTH WINDS ALSO EXPECTED TO
CONTINUE OVERNIGHT. WHILE THE WARMER TEMPERATURES AND LIGHT BREEZE MAY
INITIALLY HELP KEEP THINGS MORE MIXED, WE'RE STILL EXPECTING A NIGHTTIME
TEMPERATURE INVERSION TO SET UP BY 8-9 PM EDT, CONTINUING THROUGH 9-10 AM
EDT THURSDAY. AS A RESULT, MIXING HEIGHTS OVERNIGHT WILL GENERALLY BE AROUND
500-700 FT, BUT MAY DROP AS LOW AS 200 FT IMMEDIATELY AFTER SUNSET.
TOMORROW, MOSTLY SUNNY SKIES ARE EXPECTED WITH JUST A FEW PASSING HIGH CLOUDS
THROUGH THE DAYTIME HOURS. TEMPERATURES ARE EXPECTED TO SURGE INTO THE MID 80S
THURSDAY AFTERNOON. DEEP MIXING IS EXPECTED FROM LATE THURSDAY MORNING THROUGH
THE EARLY EVENING HOURS, WITH MIXING HEIGHTS REACHING TO AROUND 5K FT AT PEAK.
RELATIVE HUMIDITY IS NOT EXPECTED TO FALL AS LOW AS TODAY, BUT SHOULD STILL
FALL INTO THE UPPER 30S AND LOW 40S DURING THE AFTERNOON, ESPECIALLY GIVEN
THE SOUTHERN ASPECT OF THE FORECAST SITE.
THURSDAY NIGHT SHOULD REMAIN DRY AT THE FORECAST SITE, THOUGH A CHANCE FOR
SHOWERS AND POSSIBLY A STORM RETURNS BY AROUND SUNRISE FRIDAY. THIS WILL BE
AHEAD OF A COLD FRONT WHICH WILL CAUSE WINDS TO SWITCH FROM SOUTHWESTERLY TO
NORTHERLY. TEMPERATURES SHOULD START IN THE UPPER 60S ON FRIDAY, BEFORE COOLING
THROUGH THE DAY. INTERMITTENT SHOWER/STORM CHANCES ARE ALSO EXPECTED ON FRIDAY.
REST OF TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (25-35 PERCENT).
TEMPERATURE.........71 AT IGNITION...MIN 60.
RH..................39 PERCENT AT IGNITION...MAX 78 PERCENT.
WIND (20 FT)........WINDS SOUTH AT 5 MPH AT IGNITION...OTHERWISE
SOUTH WINDS 5 TO 7 MPH. GUSTS UP TO 22 MPH
OVERNIGHT.
MIXING HEIGHT.......1400 FT AGL AT IGNITION...OTHERWISE 200 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 13 TO 18 MPH.
SMOKE DISPERSAL.....POOR /16900 KNOT-FT/ AT IGNITION. MIN...POOR
/2700 KNOT-FT/.
LVORI...............3.
ADI.................6 TO 16.
TIME (EDT) 7 PM 9 PM 11 PM 1 AM 3 AM 5 AM
SKY (%).........37 30 35 36 25 22
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
TEMP............71 66 63 63 62 62
RH..............39 54 65 65 70 72
20 FT WIND......S 5 S 5 S 5 S 5 S 6 S 6
20 FT WIND GUST.11 11 13 14 14 15
MIX HGT (FT)....1400 200 600 600 700 800
TRANSPORT WIND..S 14 S 13 S 16 SW 17 SW 17 SW 18
LVORI...........2 2 3 3 3 3
ADI.............6 6 7 12 15 16
SDSPL KT-FT/100017 3 8 10 11 13
THURSDAY
SKY/WEATHER.........SUNNY (15-25 PERCENT).
TEMPERATURE.........MAX 84.
RH..................MIN 39 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 7 TO 12 MPH WITH GUSTS TO
AROUND 21 MPH.
MIXING HEIGHT.......4900 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 17 TO 26 MPH INCREASING TO 28 TO 30
MPH IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (11600 KNOT-FT) EARLY IN THE MORNING
INCREASING TO EXCELLENT (114800 KNOT-FT)
LATE IN THE AFTERNOON.
LVORI...............3.
ADI.................12 EARLY IN THE MORNING INCREASING TO 91 IN THE
AFTERNOON.
TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........24 27 20 15 8 2
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
TEMP............61 62 68 76 82 84
RH..............75 78 64 52 44 41
20 FT WIND......S 6 S 6 SW 9 SW 9 SW 10 SW 10
20 FT WIND GUST.15 17 20 21 20 20
MIX HGT (FT)....800 900 1700 3000 4400 4900
TRANSPORT WIND..SW 17 SW 17 SW 23 SW 28 SW 29 SW 30
LVORI...........4 3 1 1 1 1
ADI.............12 17 50 89 83 91
SDSPL KT-FT/100012 13 34 73 110 128
THURSDAY NIGHT
SKY/WEATHER.........PARTLY CLOUDY (20-30 PERCENT). SHOWERS LIKELY
EARLY IN THE MORNING FRIDAY.
TEMPERATURE.........MIN 58.
RH..................MAX 75 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 7 TO 12 MPH WITH GUSTS TO
AROUND 20 MPH.
MIXING HEIGHT.......900 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 20 TO 26 MPH.
SMOKE DISPERSAL.....GOOD (80700 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (14700 KNOT-FT) LATE IN THE
NIGHT.
LVORI...............2.
ADI.................69 EARLY IN THE EVENING DECREASING TO 13 LATE
IN THE NIGHT.
TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM
SKY (%).........4 11 15 20 31 42
WEATHER COV.....
WEATHER TYPE....NONE NONE NONE NONE NONE NONE
TSTM COV........
TEMP............84 80 76 74 71 68
RH..............40 47 52 55 61 68
20 FT WIND......SW 10 SW 7 SW 7 SW 7 SW 7 SW 6
20 FT WIND GUST.20 16 17 18 18 18
MIX HGT (FT)....3500 1100 1000 1300 1300 1400
TRANSPORT WIND..SW 26 SW 21 SW 21 SW 21 SW 22 SW 22
LVORI...........1 2 2 2 2 3
ADI.............69 14 14 14 15 24
SDSPL KT-FT/100081 19 19 24 25 26
FRIDAY
SKY/WEATHER.........MOSTLY CLOUDY (70-80 PERCENT). RAIN SHOWERS
LIKELY EARLY IN THE MORNING, THEN SLIGHT CHANCE
OF THUNDERSTORMS EARLY IN THE MORNING.
TEMPERATURE.........MAX 67.
RH..................MIN 68 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 7 MPH WITH GUSTS TO AROUND
16 MPH SHIFTING TO THE NORTH 6 TO 7 MPH IN THE
LATE MORNING AND AFTERNOON. GUSTY AND ERRATIC
WINDS EXPECTED NEAR THUNDERSTORMS EARLY IN THE
MORNING.
MIXING HEIGHT.......2400 FT AGL.
TRANSPORT WINDS.....WEST 14 TO 18 MPH SHIFTING TO THE NORTH 15 TO
21 MPH IN THE LATE MORNING AND AFTERNOON.
SMOKE DISPERSAL.....POOR (14500 KNOT-FT) EARLY IN THE MORNING
INCREASING TO FAIR (39000 KNOT-FT) IN THE
AFTERNOON.
LVORI...............4.
ADI.................16 TO 41.
TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM
SKY (%).........56 71 84 91 92 85
WEATHER COV.....LIKELY DEFNTE DEFNTE DEFNTE DEFNTE DEFNTE
WEATHER TYPE....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR
TSTM COV........ S CHC S CHC
TEMP............66 65 64 61 56 54
RH..............73 73 75 81 90 86
20 FT WIND......SW 6 SW 4 NW 5 N 6 N 6 N 6
20 FT WIND GUST.16 10 11 13 13 13
MIX HGT (FT)....1300 1200 1900 2200 2000 2300
TRANSPORT WIND..SW 18 W 14 NW 15 N 18 N 21 N 20
LVORI...........3 3 3 3 4 4
ADI.............16 20 28 38 40 41
SDSPL KT-FT/100021 15 25 36 35 39
FORECASTER...CSG
REQUESTED BY...ROBERT VICK
TYPE OF REQUEST...PRESCRIBED
.TAG 2607942.0/LMK
.DELDT 03/25/26
.FORMATTERVERSION 2.0.0
.EMAIL ROBERT_VICK@NPS.GOV
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