263
FNUS73 KLOT 071451
FWSLOT

Spot Forecast for RX SJF Carlson Updated...Forest Preserve District of DuPage County
National Weather Service Chicago IL
851 AM CST Fri Nov 7 2025

Forecast is based on ignition time of 1100 CST on November 07.
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...Aside from a small (~20%) chance for an isolated late
afternoon and evening shower, the remainder of the day today
will be dry. It will be another unseasonably warm day, albeit
quit breezy, with westerly winds gusting as high as 30 mph during
the afternoon. Colder weather, with additional precipitation
chances are expected for the weekend.

.REST OF TODAY...

Sky/weather.........Mostly sunny then becoming partly cloudy.
Temperature.........58 at ignition...Max 61.
RH..................59 percent at ignition...Min 50 percent.
Wind (20 ft)........Winds west at 16 mph at ignition...otherwise
                    West winds 15 to 16 mph decreasing to around 12
                    mph late in the afternoon.
Chance of pcpn......10 percent.
Transport winds.....West 22 to 26 mph decreasing to around 18 mph
                    late in the afternoon.
Mixing height.......3000 ft AGL at ignition...otherwise 5200 ft
                    AGL.
Smoke dispersal.....Excellent /61200 knot-ft/ at ignition.
                    Max...excellent /114300 knot-ft/.

TIME (CST)      11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........23  13  18  23  28  37  47
Weather cov.....
Weather type....
Temp............58  59  60  61  61  59  56
RH..............59  54  51  50  50  53  57
20 FT wind dir..270 270 280 280 280 280 280
20 FT wind spd..16  17  17  17  16  16  13
20 FT wind gust.26  26  26  26  25  24  18
Mix hgt (kft)...3.0 3.8 4.4 4.8 5.2 3.9 2.5
Transp wind dir.260 260 260 260 260 270 280
Transp wind spd.23  24  26  26  25  22  18
Chc of pcpn (%).10  10  0   0   10  10  10
Vrate kt-ft/1K..61  80  101 112 114 74  40

.TONIGHT...

Sky/weather.........Mostly cloudy then becoming partly cloudy then
                    becoming mostly cloudy. Slight chance of rain
                    early in the evening.
Temperature.........Min 39.
RH..................Max 95 percent.
Wind (20 ft)........Northwest winds 6 to 9 mph shifting to the
                    north 5 to 6 mph overnight.
Chance of pcpn......20 percent.
Transport winds.....Northwest 12 to 17 mph decreasing to 8 to 10
                    mph overnight.
Mixing height.......500 ft AGL.
Smoke dispersal.....Fair (21000 knot-ft) early in the evening
                    decreasing to poor (4100 knot-ft) late in the
                    night.

TIME (CST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........56  60  64  68  61  55  49  49  50  51  57  64
Weather cov.....SCH SCH SCH
Weather type....RN  RN  RN
Temp............54  52  51  49  48  46  45  43  42  41  40  39
RH..............62  65  68  71  74  76  79  81  83  86  88  89
20 FT wind dir..290 300 310 320 330 340 340 350 350 350 350 000
20 FT wind spd..10  9   9   8   8   7   6   6   6   6   6   5
20 FT wind gust.16  15  15  15  14  12  9   8   8   8   8   8
Mix hgt (kft)...1.2 1.3 1.3 1.4 1.4 1.3 1.3 1.3 1.4 1.4 1.3 0.5
Transp wind dir.280 290 300 310 310 320 320 320 330 330 330 000
Transp wind spd.15  15  16  17  16  14  12  10  10  9   8   9
Chc of pcpn (%).20  20  20  10  10  10  0   0   0   10  10  10
Vrate kt-ft/1K..16  17  19  21  19  16  14  13  12  12  10  4

.SATURDAY...

Sky/weather.........Mostly cloudy. Slight chance of rain early in
                    the morning, then chance of rain in the late
                    morning and early afternoon. Rain late in the
                    afternoon.
Temperature.........Max 49.
RH..................Min 75 percent.
Wind (20 ft)........North winds 5 to 7 mph.
Chance of pcpn......100 percent.
Transport winds.....North 6 to 10 mph.
Mixing height.......3200 ft AGL.
Smoke dispersal.....Poor (7100 knot-ft) early in the morning
                    increasing to fair (17100 knot-ft) in the
                    afternoon.

TIME (CST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........68  72  79  82  81  85  88  88  89  89  92  94
Weather cov.....SCH SCH SCH CHC CHC CHC CHC CHC CHC DEF DEF DEF
Weather type....RN  RN  RN  RN  RN  RN  RN  RN  RN  RN  RN  RN
Temp............39  40  42  44  47  49  49  49  48  48  47  46
RH..............94  95  93  86  79  75  75  76  78  80  83  86
20 FT wind dir..000 000 010 020 020 020 020 020 020 030 030 020
20 FT wind spd..5   5   5   6   6   6   6   6   6   7   7   8
20 FT wind gust.8   7   8   8   8   7   7   7   8   9   10  12
Mix hgt (kft)...1.2 1.4 1.7 1.9 2.4 2.8 3.2 2.9 2.6 2.4 2.1 1.9
Transp wind dir.340 350 000 000 010 020 020 020 030 030 030 030
Transp wind spd.7   6   6   6   6   6   6   7   7   8   9   10
Chc of pcpn (%).20  20  20  30  30  30  50  50  50  100 100 100
Vrate kt-ft/1K..7   8   8   9   11  14  17  17  17  17  17  16

$$
Forecaster...Birk
Requested by...Adam Carlson
Type of request...PRESCRIBED
.TAG 2525379.0/LOT
.DELDT 11/07/25
.FormatterVersion 2.0.0