204
FNUS73 KLOT 031359
FWSLOT

Spot Forecast for Midewin RX...US Forest Service
National Weather Service Chicago IL
859 AM CDT Thu Apr 3 2025

Forecast is based on ignition time of 1000 CDT on April 03.
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...
Fairly quiet conditions are expected today. There is little cloud
cover over the burn site this morning, but clouds to the west
should gradually move in helping to limit high temperatures to the
mid to upper 50s. Winds remain out of the west with gusts around
25 mph (occasionally up to 30 mph). Winds should weaken into the
afternoon as a surface high passes over. Shower chances are low
today, around 10 percent. Damp conditions remain from yesterday`s
rain, but with daytime heating, RHs should dry down to around 50
percent.

Conditions remain quiet through overnight as winds turn to the
east-northeast, but remain light. Winds will become breezy out
ahead of the next weather system on Friday. Shower chances return
in the afternoon with the potential for heavier rain
accumulations.

.REST OF TODAY...

Sky/weather.........Partly cloudy then becoming mostly cloudy.
Temperature.........51 at ignition...Max 57.
RH..................66 percent at ignition...Min 55 percent.
Wind (20 ft)........Winds west at 18 mph at ignition...otherwise
                    West winds 14 to 17 mph with gusts to around 29
                    mph decreasing to 8 to 9 mph.
Chance of pcpn......10 percent.
Transport winds.....West 21 to 24 mph decreasing to 13 to 17 mph
                    late in the afternoon.
Mixing height.......2800 ft AGL at ignition...otherwise 3200 ft
                    AGL.
Smoke dispersal.....Good /59000 knot-ft/ at ignition.
                    Max...excellent /62900 knot-ft/.

TIME (CDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........37  47  64  81  83  85  84  83
Weather cov.....
Weather type....
Temp............51  52  53  54  54  54  54  53
RH..............66  63  59  57  57  57  55  59
20 FT wind dir..270 270 270 270 270 280 290 290
20 FT wind spd..18  17  17  15  14  12  10  9
20 FT wind gust.29  26  25  23  21  18  16  13
Mix hgt (kft)...2.8 3.0 3.1 3.1 3.2 3.0 2.9 2.2
Transp wind dir.260 260 260 260 270 280 280 290
Transp wind spd.24  24  22  21  21  17  15  13
Chc of pcpn (%).0   0   0   10  10  10  10  10
Vrate kt-ft/1K..59  63  59  57  58  46  37  25

.TONIGHT...

Sky/weather.........Mostly cloudy. Slight chance of rain showers
                    overnight.
Temperature.........Min 42.
RH..................Max 89 percent.
Wind (20 ft)........Northwest winds 5 to 6 mph shifting to the
                    northeast 5 to 7 mph in the late evening and
                    overnight.
Chance of pcpn......20 percent.
Transport winds.....Northwest 7 to 9 mph shifting to the northeast
                    12 to 13 mph after 3 am.
Mixing height.......400 ft AGL.
Smoke dispersal.....Fair (13800 knot-ft) early in the evening
                    decreasing to poor (1700 knot-ft) late in the
                    night.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........82  82  81  79  78  76  74  73  73  72  72  71
Weather cov.....                            SCH SCH SCH
Weather type....                            RW  RW  RW
Temp............53  52  50  49  48  47  46  45  45  44  44  44
RH..............59  66  71  74  77  79  83  86  82  86  86  82
20 FT wind dir..300 310 330 010 040 040 040 050 050 060 060 060
20 FT wind spd..7   6   5   5   5   6   6   7   7   8   8   8
20 FT wind gust.12  10  9   9   9   10  12  13  14  15  16  16
Mix hgt (kft)...1.7 0.7 0.5 0.4 0.4 0.4 0.5 0.6 0.6 0.6 0.6 0.6
Transp wind dir.300 310 330 010 040 040 040 050 050 060 060 060
Transp wind spd.9   8   7   6   6   6   9   8   10  10  12  13
Chc of pcpn (%).10  10  10  10  10  10  10  20  20  20  10  10
Vrate kt-ft/1K..14  5   3   2   2   2   4   5   5   5   6   7

.FRIDAY...

Sky/weather.........Mostly cloudy. Rain showers likely in the
                    afternoon.
Temperature.........Max 54.
RH..................Min 71 percent.
Wind (20 ft)........East winds 7 to 10 mph shifting to the
                    northeast late in the afternoon.
Chance of pcpn......70 percent.
Transport winds.....East 14 to 18 mph shifting to the northeast
                    around 20 mph late in the afternoon.
Mixing height.......2000 ft AGL.
Smoke dispersal.....Poor (9200 knot-ft) early in the morning
                    increasing to good (31800 knot-ft) in the
                    afternoon.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........70  68  68  68  67  72  77  82  85  88  91  91
Weather cov.....                            LKY LKY LKY LKY LKY
Weather type....                            RW  RW  RW  RW  RW
Temp............42  43  44  46  48  50  52  52  53  53  52  51
RH..............89  86  86  83  77  74  71  74  74  74  77  77
20 FT wind dir..060 060 070 070 080 080 080 080 070 070 070 060
20 FT wind spd..8   8   9   10  12  12  12  10  12  13  13  13
20 FT wind gust.16  17  17  17  17  17  17  17  18  20  21  21
Mix hgt (kft)...0.8 0.8 1.2 1.3 1.6 1.8 1.9 2.0 2.0 1.9 1.9 1.6
Transp wind dir.060 060 070 070 080 080 080 080 070 070 070 060
Transp wind spd.14  14  15  15  17  16  16  16  17  18  20  20
Chc of pcpn (%).10  0   0   0   10  10  10  60  60  60  70  70
Vrate kt-ft/1K..9   10  15  17  24  25  26  29  30  31  32  27

$$
Forecaster...King
Requested by...Brian Wolvert
Type of request...PRESCRIBED
.TAG 2508770.0/LOT
.DELDT 04/03/25
.FormatterVersion 2.0.0