787
FNUS73 KLMK 200950
FWSLMK
SPOT FORECAST FOR IRON BRIDGE UNIT...IN DNR
NATIONAL WEATHER SERVICE LOUISVILLE KY
550 AM EDT FRI MAR 20 2026
FORECAST IS BASED ON IGNITION TIME OF 1130 EDT ON MARCH 20.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
WINDS WILL BECOME GUSTY LATER THIS AFTERNOON AS WARMER AIR
ADVECTS IN AHEAD OF AN APPROACHING COLD FRONT. THINK WE COULD SEE SOME GOOD
DRY AIR MIXING THIS AFTERNOON, SO WENT AHEAD AND LOWERED DEWPOINTS WHICH IN
TURN LOWERED RH VALUES FOR THIS AFTERNOON. MOST WILL BE 30-35 PERCENT WITH A
FEW ISOLATED LOCATIONS, MOSTLY THOSE TO THE WEST-SOUTHWEST IN THE UPPER 20S.
THERE WILL BE GOOD TRANSPORT WINDS AND MIXING HEIGHTS FOR SMOKE DISPERSION.
REST OF TODAY
SKY/WEATHER.........MOSTLY SUNNY (40-50 PERCENT).
TEMPERATURE.........67 AT IGNITION...MAX 78.
RH..................57 PERCENT AT IGNITION...MIN 31 PERCENT.
WIND (20 FT)........WINDS SOUTHWEST AT 5 MPH AT
IGNITION...OTHERWISE SOUTHWEST WINDS 5 TO 7
MPH. GUSTS UP TO 20 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......2100 FT AGL AT IGNITION...OTHERWISE 3900 FT
AGL.
TRANSPORT WINDS.....SOUTHWEST 21 TO 23 MPH.
SMOKE DISPERSAL.....FAIR /39200 KNOT-FT/ AT IGNITION. MAX...GOOD
/78500 KNOT-FT/.
LVORI...............2.
ADI.................37 EARLY IN THE MORNING INCREASING TO 108 IN
THE AFTERNOON.
TIME (EDT) 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........59 57 54 57 56 45 34
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............63 67 71 74 76 77 78
RH..............57 51 46 40 36 33 31
20 FT WIND DIR..SW SW SW SW SW SW SW
20 FT WIND SPD..4 5 6 6 6 6 6
20 FT WIND GUST.11 12 13 13 14 14 12
MIX HGT (KFT)...1.6 2.1 2.5 3.0 3.5 3.9 3.9
TRANSP WIND DIR.SW SW W W W W W
TRANSP WIND SPD.22 22 22 21 22 23 23
LVORI...........3 1 1 1 1 1 1
ADI.............37 43 48 49 57 108 107
SDSPL KT-FT/100030 39 48 54 67 79 78
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) THEN BECOMING
MOSTLY CLOUDY (60-70 PERCENT).
TEMPERATURE.........MIN 50.
RH..................MAX 85 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 5 TO 6 MPH EARLY IN THE EVENING
BECOMING LIGHT.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....WEST 12 TO 21 MPH SHIFTING TO THE NORTH 8 TO 10
MPH OVERNIGHT, THEN SHIFTING TO THE NORTHEAST
AROUND 7 MPH AFTER 3 AM.
SMOKE DISPERSAL.....GOOD (54500 KNOT-FT) EARLY IN THE EVENING
DECREASING TO POOR (2700 KNOT-FT) LATE IN THE
NIGHT.
LVORI...............3.
ADI.................78 EARLY IN THE EVENING DECREASING TO 3 LATE IN
THE NIGHT.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........28 31 28 34 40 36 39 48 57 56 73 66
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............77 76 73 70 69 67 65 63 61 59 57 54
RH..............32 35 43 55 57 62 66 69 71 74 80 83
20 FT WIND DIR..W SW SW SW SW W NW N N NE NE NE
20 FT WIND SPD..5 4 4 3 3 2 2 2 2 2 2 2
20 FT WIND GUST.11 10 9 8 7 7 6 5 5 4 4 4
MIX HGT (KFT)...3.0 1.9 0.8 0.5 0.5 0.6 0.5 0.5 0.5 0.5 0.4 0.4
TRANSP WIND DIR.W W W W W W NW N N N NE NE
TRANSP WIND SPD.21 17 15 14 13 13 12 10 9 8 7 7
LVORI...........1 2 2 3 3 3 3 3 4 4 5 5
ADI.............78 8 7 6 6 6 5 5 4 4 3 3
SDSPL KT-FT/100055 28 11 6 5 6 5 4 4 3 3 3
SATURDAY
SKY/WEATHER.........MOSTLY SUNNY (30-40 PERCENT).
TEMPERATURE.........MAX 78.
RH..................MIN 32 PERCENT.
WIND (20 FT)........LIGHT WINDS.
MIXING HEIGHT.......3200 FT AGL.
TRANSPORT WINDS.....EAST AROUND 7 MPH SHIFTING TO THE WEST AROUND 6
MPH LATE IN THE AFTERNOON.
SMOKE DISPERSAL.....POOR (2400 KNOT-FT).
LVORI...............4.
ADI.................3 TO 24.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........64 64 57 55 47 39 32 26 19 15 12 8
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
TEMP............53 52 50 53 57 61 65 69 73 77 78 78
RH..............82 82 85 79 71 62 53 48 40 35 32 33
20 FT WIND DIR..NE NE NE NE E E E E E SE SW SW
20 FT WIND SPD..2 2 2 2 2 2 2 2 2 2 1 1
20 FT WIND GUST.4 4 4 4 4 4 4 4 4 4 4 4
MIX HGT (KFT)...0.4 0.4 0.5 0.7 0.9 1.2 1.5 1.9 2.2 2.7 3.2 3.2
TRANSP WIND DIR.NE E E E E E SE SE S S SW W
TRANSP WIND SPD.7 7 7 7 7 7 6 6 5 5 6 6
LVORI...........5 4 5 5 4 3 2 2 2 2 2 2
ADI.............3 7 7 7 8 11 11 14 13 16 24 24
SDSPL KT-FT/10003 2 3 4 6 7 8 9 9 11 16 16
FORECASTER...BTN
REQUESTED BY...STAN BAELZ
TYPE OF REQUEST...PRESCRIBED
.TAG 2606586.1/LMK
.DELDT 03/20/26
.FORMATTERVERSION 2.0.0
.EMAIL SBAELZ@DNR.IN.GOV
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