444
FNUS73 KLOT 172138
FWSLOT
SPOT FORECAST FOR BAILEY DRIVE PILE...NATIONAL PARK SERVICE
NATIONAL WEATHER SERVICE CHICAGO IL
438 PM CDT WED SEP 17 2025
FORECAST IS BASED ON IGNITION TIME OF 0800 CDT ON SEPTEMBER 18.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
PLEASE CONTACT OUR OFFICE AT (815) 834-0666 IF YOU HAVE QUESTIONS
OR CONCERNS WITH THIS FORECAST.
DISCUSSION
TOMORROW WILL BE SIMILAR TO THE PAST FEW DAYS. THE DAY WILL START
COOL WITH TEMPERATURES AT IGNITION TIME IN THE MID 60S. WINDS MAY
BE NEARLY CALM THROUGHOUT THE MORNING BEFORE BECOMING LIGHT AT 5
MPH OUT OF THE SOUTH. TEMPERATURES WILL QUICKLY WARM TO AROUND
80 DEGREES BY EARLY AFTERNOON BEFORE A LAKE BREEZE SHIFTS INLAND
DURING THE AFTERNOON. THE LAKE BREEZE WILL BE ACCOMPANIED BY A
SHIFT IN WIND DIRECTION FROM THE NORTHEAST AND AN INCREASE IN
WIND SPEEDS TO 5 TO 10 MPH. RELATIVE HUMIDITY VALUES WILL SLOWLY
CREEP UPWARD IN THE WAKE OF THE LAKE BREEZE, AS WELL. NO RAIN IS
EXPECTED TOMORROW.
FRIDAY LOOKS SIMILAR TO TOMORROW.
THURSDAY
SKY/WEATHER.........SUNNY.
TEMPERATURE.........65 AT IGNITION...MAX 79.
RH..................74 PERCENT AT IGNITION...MIN 51 PERCENT.
WIND (20 FT)........NEARLY CALM THROUGH THE MORNING, BECOMING
SOUTH AT AROUND 5 MPH BY NOON. THEN, BECOMING
NORTHEAST 5 TO 10 MPH IN THE AFTERNOON.
CHANCE OF PCPN......0 PERCENT.
TRANSPORT WINDS.....SOUTH AROUND 5 MPH SHIFTING TO THE NORTH AROUND
9 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......300 FT AGL AT IGNITION...OTHERWISE 1200 FT AGL.
SMOKE DISPERSAL.....POOR /1300 KNOT-FT/ AT IGNITION. MAX...POOR
/5000 KNOT-FT/.
TIME (CDT) 3AM 4AM 5AM 6AM 7AM 8AM 9AM 10A 11A 12P
SKY (%).........16 13 9 10 11 13 12 12 11 12
WEATHER COV.....
WEATHER TYPE....
TEMP............65 70 74 77 78 79 79 78 78 77
RH..............74 65 61 56 54 51 52 53 54 57
20 FT WIND DIR..140 150 170 190 300 330 000 020 030 040
20 FT WIND SPD..1 1 2 3 5 6 7 7 8 8
20 FT WIND GUST. 2 8 10 12 12
MIX HGT (KFT)...0.3 0.7 1.2 0.6 0.6 0.7 0.6 0.5 0.5 0.5
TRANSP WIND DIR.180 200 220 280 340 000 010 020 020 020
TRANSP WIND SPD.5 5 5 3 3 5 6 7 8 9
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0
VRATE KT-FT/1K..1 3 5 2 2 3 3 3 3 4
THURSDAY NIGHT
SKY/WEATHER.........MOSTLY CLEAR.
TEMPERATURE.........MIN 63.
RH..................MAX 82 PERCENT.
WIND (20 FT)........NORTHEAST WINDS 5 TO 7 MPH IN THE EVENING
BECOMING NEARLY CALM OVERNIGHT.
CHANCE OF PCPN......0 PERCENT.
TRANSPORT WINDS.....NORTHEAST 6 TO 10 MPH.
MIXING HEIGHT.......400 FT AGL.
SMOKE DISPERSAL.....POOR (2400 KNOT-FT).
TIME (CDT) 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P 11P MID
SKY (%).........12 13 15 17 19 20 22 24 25 25 27 25
WEATHER COV.....
WEATHER TYPE....
TEMP............75 73 71 69 68 68 67 66 66 65 65 64
RH..............60 66 71 73 75 76 77 78 78 79 80 82
20 FT WIND DIR..050 050 050 060 060 060 070 070 080 090 100 100
20 FT WIND SPD..7 7 6 5 5 5 5 5 3 3 3 3
20 FT WIND GUST.10 9 7 7 7 6 6 6 6 5 5 5
MIX HGT (KFT)...0.4 0.4 0.4 0.4 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.5
TRANSP WIND DIR.030 030 030 030 040 040 040 050 050 060 060 070
TRANSP WIND SPD.9 10 10 10 10 9 8 7 6 6 6 6
CHC OF PCPN (%).0 0 0 0 0 0 0 0 0 0 0 0
VRATE KT-FT/1K..3 3 4 4 4 4 3 3 3 2 2 3
FRIDAY
SKY/WEATHER.........MOSTLY SUNNY THEN BECOMING PARTLY CLOUDY.
TEMPERATURE.........MAX 81.
RH..................MIN 52 PERCENT.
WIND (20 FT)........NEARLY CALM THROUGH THE MORNING, BECOMING
EAST AT AROUND 5 MPH BY NOON. THEN, BECOMING
NORTHEAST 5 TO 10 MPH IN THH AFTERNOON.
CHANCE OF PCPN......10 PERCENT.
TRANSPORT WINDS.....NORTHEAST 5 TO 9 MPH SHIFTING TO THE NORTH 10
TO 12 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......1700 FT AGL.
SMOKE DISPERSAL.....POOR (2000 KNOT-FT).
TIME (CDT) 1AM 2AM 3AM 4AM 5AM 6AM 7AM 8AM 9AM 10A 11A 12P
SKY (%).........24 23 23 23 23 25 26 28 30 32 34 36
WEATHER COV.....
WEATHER TYPE....
TEMP............63 64 67 71 75 78 79 80 81 81 80 79
RH..............82 80 75 69 63 58 55 53 52 52 54 58
20 FT WIND DIR..100 100 100 110 110 100 070 060 050 040 030 030
20 FT WIND SPD..3 3 5 5 5 5 6 6 6 7 7 8
20 FT WIND GUST.5 6 6 6 6 7 7 7 8 9 10 12
MIX HGT (KFT)...0.5 0.5 0.8 1.1 1.3 1.4 1.6 1.7 1.5 1.3 1.0 0.9
TRANSP WIND DIR.080 080 080 080 090 080 060 050 040 030 020 020
TRANSP WIND SPD.5 5 6 6 6 6 7 7 8 9 10 12
CHC OF PCPN (%).0 0 0 0 0 0 0 10 10 10 10 10
VRATE KT-FT/1K..2 2 4 5 7 7 10 10 10 10 9 9
FORECASTER...BORCHARDT
REQUESTED BY...MICHEAL BASCHEN
TYPE OF REQUEST...PRESCRIBED
.TAG 2522108.0/LOT
.DELDT 09/17/25
.FORMATTERVERSION 2.0.0
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