971
FNUS73 KLOT 222203
FWSLOT

Spot Forecast for RX JPP Carlson...Forest Preserve District of DuPage County
National Weather Service Chicago IL
403 PM CST Sat Nov 22 2025

Forecast is based on ignition time of 1000 CST on November 23.
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...
A cold front will shift winds out of the northwest late tonight
into Sunday morning. Winds will eventually shift out of the
southwest late Sunday afternoon. Mixing heights will slowly rise
to around 1000 ft through late morning before quickly falling
after 3 PM. South to southeasterly winds on Monday will result in
increasing moisture ahead of the next disturbance which will bring
an increasing chance for showers, mainly very late Monday
afternoon and evening.

.SUNDAY...

Sky/weather.........Sunny.
Temperature.........44 at ignition...Max 52.
RH..................67 percent at ignition...Min 48 percent.
Wind (20 ft)........Northwest winds 5 to 10 mph, becoming west-
                    northwest in the afternoon.
Chance of pcpn......0 percent.
Transport winds.....Northwest 10 to 13 mph shifting to the west
                    around 7 mph late in the afternoon.
Mixing height.......1000 ft AGL at ignition...increasing briefly to
                    1800 ft AGL early in the afternoon.
Smoke dispersal.....Poor /12000 knot-ft/ at ignition. Max...fair
                    /20200 knot-ft/.

TIME (CST)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........5   5   6   6   6   6   6   5
Weather cov.....
Weather type....
Temp............44  47  49  51  52  52  49  46
RH..............67  59  53  50  48  48  53  60
20 FT wind dir..310 300 300 290 290 280 260 250
20 FT wind spd..9   9   8   8   7   7   5   5
20 FT wind gust.14  14  13  13  12  10  8   7
Mix hgt (kft)...1.0 1.3 1.5 1.7 1.8 1.4 0.5 0.4
Transp wind dir.310 300 300 290 290 280 270 250
Transp wind spd.13  12  12  12  13  10  7   7
Chc of pcpn (%).0   0   0   0   0   0   0   0
Vrate kt-ft/1K..12  13  15  17  20  12  3   2

.SUNDAY NIGHT...

Sky/weather.........Partly cloudy.
Temperature.........Min 33.
RH..................Max 91 percent.
Wind (20 ft)........Light winds becoming south around 5 mph after 3
                    am.
Chance of pcpn......0 percent.
Transport winds.....Southwest 7 to 12 mph shifting to the south
                    around 13 mph after 3 am.
Mixing height.......400 ft AGL.
Smoke dispersal.....Poor (2200 knot-ft).

TIME (CST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........5   7   6   7   7   11  15  23  32  40  43  46
Weather cov.....
Weather type....
Temp............43  41  39  38  37  36  35  35  34  34  33  33
RH..............67  72  76  77  81  82  82  84  86  88  90  91
20 FT wind dir..240 230 220 220 220 210 200 200 190 190 190 180
20 FT wind spd..3   3   3   3   3   3   3   3   5   5   5   6
20 FT wind gust.6   6   6   7   7   8   8   8   9   9   10  10
Mix hgt (kft)...0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
Transp wind dir.240 230 220 220 220 210 200 200 190 190 190 180
Transp wind spd.7   7   8   8   9   10  10  9   10  12  13  13
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   0
Vrate kt-ft/1K..2   3   3   3   4   4   4   3   3   4   4   4

.MONDAY...

Sky/weather.........Partly cloudy then becoming mostly cloudy.
                    Slight chance of rain showers in the afternoon.
Temperature.........Max 54.
RH..................Min 63 percent.
Wind (20 ft)........South winds 6 to 9 mph increasing to 8 to 10
                    mph late in the morning with gusts to around 20 mph
                    in the afternoon.
Chance of pcpn......20 percent.
Transport winds.....South 13 to 18 mph.
Mixing height.......1300 ft AGL.
Smoke dispersal.....Poor (4300 knot-ft) early in the morning
                    increasing to fair (21600 knot-ft) in the
                    afternoon.

TIME (CST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........49  53  58  62  68  74  80  84  87  91  91  92
Weather cov.....                        SCH SCH SCH SCH SCH SCH
Weather type....                        RW  RW  RW  RW  RW  RW
Temp............33  35  39  42  45  49  51  53  53  53  52  51
RH..............91  89  86  81  75  69  65  63  63  65  67  70
20 FT wind dir..180 180 180 180 180 180 180 180 180 180 180 170
20 FT wind spd..6   7   8   9   10  10  12  12  12  10  10  9
20 FT wind gust.12  13  14  15  16  17  18  18  18  17  16  16
Mix hgt (kft)...0.4 0.5 0.5 0.6 0.8 1.1 1.3 1.3 1.2 1.1 0.9 0.8
Transp wind dir.180 180 180 180 180 180 180 180 180 180 180 170
Transp wind spd.13  14  14  15  16  17  18  17  15  14  13  13
Chc of pcpn (%).0   0   0   0   0   0   20  20  20  20  20  20
Vrate kt-ft/1K..4   5   6   8   12  17  22  19  16  13  11  9

$$
Forecaster...Carlaw
Requested by...Adam Carlson
Type of request...PRESCRIBED
.TAG 2526530.0/LOT
.DELDT 11/22/25
.FormatterVersion 2.0.0