010
FNUS73 KLOT 031702
FWSLOT

Spot Forecast for Midewin Fall RX...MIDEWIN
National Weather Service Chicago IL
1102 AM CST Mon Nov 3 2025

Forecast is based on ignition time of 1000 CST on November 04.
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...
Broken to overcast mid and upper-level clouds Tuesday morning will
gradually clear through the afternoon hours. A few sprinkles
cannot be ruled during the morning, though chances are under 20
percent. Mixing heights will be slow to increase through the
morning owning to the cloud cover, but quickly increase to around
3kft early in the afternoon as clouds depart. Correspondingly,
south winds around 10 mph in the morning will increase to around
15 mph with gusts to around 25 mph through much of the afternoon
hours. RH recovery of 75 to 80 percent tonight will allow RH
values to fall to around 30 percent by noon, with minimum values
as low as 25 percent during the afternoon.

Mostly sunny skies are expected for Wednesday. A cold front
crossing the area during the morning will shift winds from
southwest around daybreak to northwest with gusts around 25 mph
by early afternoon. Dew points will be falling through the
afternoon on Tuesday, with minimum RH values of 40 to 45 percent
expected and values under 40 percent possible.

.TUESDAY...

Sky/weather.........Mostly cloudy then becoming partly cloudy then
                    becoming mostly sunny.
Temperature.........55 at ignition...Max 63.
RH..................36 percent at ignition...Min 27 percent.
Wind (20 ft)........Winds south at 8 mph at ignition...otherwise
                    South winds 7 to 9 mph increasing to 12 to 13
                    mph in the afternoon.
Chance of pcpn......10 percent.
Transport winds.....South 16 to 18 mph increasing to 21 to 24 mph
                    in the afternoon.
Mixing height.......1300 ft AGL at ignition...otherwise 3000 ft
                    AGL.
Smoke dispersal.....Fair /18100 knot-ft/ at ignition.
                    Max...excellent /63700 knot-ft/.

TIME (CST)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........76  67  61  55  50  46  35  24
Weather cov.....
Weather type....
Temp............55  59  61  62  63  62  60  58
RH..............36  30  28  27  28  31  39  49
20 FT wind dir..170 180 180 180 180 180 180 180
20 FT wind spd..8   10  13  14  14  14  13  13
20 FT wind gust.16  20  23  24  24  24  24  24
Mix hgt (kft)...1.3 2.1 2.9 3.0 2.8 2.7 1.8 1.5
Transp wind dir.170 180 180 180 180 180 180 180
Transp wind spd.16  18  22  24  24  22  22  21
Chc of pcpn (%).0   0   10  10  10  10  10  10
Vrate kt-ft/1K..18  34  55  64  60  52  35  26

.TUESDAY NIGHT...

Sky/weather.........Mostly clear.
Temperature.........Min 50.
RH..................Max 90 percent.
Wind (20 ft)........Southwest winds 9 to 12 mph. Gusts up to 26
                    mph.
Chance of pcpn......0 percent.
Transport winds.....Southwest 16 to 21 mph.
Mixing height.......500 ft AGL.
Smoke dispersal.....Fair (18400 knot-ft) early in the evening
                    decreasing to poor (7200 knot-ft) late in the
                    night.

TIME (CST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........12  15  19  22  20  18  16  16  15  15  15  15
Weather cov.....
Weather type....
Temp............55  54  53  53  53  52  52  52  51  51  50  50
RH..............61  72  77  81  84  86  86  87  87  88  90  90
20 FT wind dir..180 180 190 190 200 210 210 220 230 230 230 240
20 FT wind spd..12  12  12  13  13  12  12  12  12  10  10  10
20 FT wind gust.24  25  25  26  25  24  23  23  22  21  20  17
Mix hgt (kft)...1.1 0.9 0.7 0.6 0.6 0.5 0.5 0.5 0.5 0.5 0.5 0.5
Transp wind dir.180 180 190 190 200 210 210 220 230 230 230 240
Transp wind spd.20  20  21  21  21  21  21  20  18  17  17  16
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   0
Vrate kt-ft/1K..18  16  13  10  10  10  10  9   9   8   8   7

.WEDNESDAY...

Sky/weather.........Sunny.
Temperature.........Max 64.
RH..................Min 44 percent.
Wind (20 ft)........West winds 9 to 10 mph shifting to the
                    northwest 12 to 14 mph in the late morning and
                    afternoon, then decreasing to around 9 mph late
                    in the afternoon.
Chance of pcpn......0 percent.
Transport winds.....West 16 to 20 mph increasing to 22 to 26 mph
                    late in the morning, then shifting to the
                    northwest 25 to 29 mph early in the afternoon
                    decreasing to 16 to 21 mph late in the
                    afternoon.
Mixing height.......4000 ft AGL.
Smoke dispersal.....Poor (7000 knot-ft) early in the morning
                    increasing to excellent (94700 knot-ft) in the
                    afternoon.

TIME (CST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........15  14  14  13  14  16  17  16  16  15  13  10
Weather cov.....
Weather type....
Temp............50  53  56  59  62  63  64  64  64  62  59  55
RH..............88  84  78  71  60  53  49  47  44  45  46  57
20 FT wind dir..240 250 270 280 290 300 300 310 310 320 320 330
20 FT wind spd..9   10  12  12  14  15  15  16  15  14  13  9
20 FT wind gust.17  17  18  20  22  24  25  26  25  23  20  15
Mix hgt (kft)...0.5 1.0 1.5 1.9 2.5 3.1 3.7 3.8 3.9 4.0 2.9 1.7
Transp wind dir.240 250 270 280 280 290 300 300 310 320 320 330
Transp wind spd.16  17  20  22  24  26  28  29  28  25  21  16
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   0
Vrate kt-ft/1K..7   15  25  37  53  73  91  95  94  89  53  24

$$
Forecaster...Kluber
Requested by...Jesse Hoh
Type of request...PRESCRIBED
.TAG 2524965.0/LOT
.DELDT 11/03/25
.FormatterVersion 2.0.0