180
FNUS73 KLOT 091239
FWSLOT

Spot Forecast for Tolleston West...NPS
National Weather Service Chicago IL
739 AM CDT Mon Mar 9 2026

Forecast is based on ignition time of 0800 CDT on March 09.
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...
Southwest winds will become gusty in the 20 to 25 mph range as
mixing deepens this morning. Early morning temperatures in the
upper 40s will warm steadily into the low to mid 60s by midday and
into the low 70s this afternoon, under sunny skies. Relative
humidity levels near 65 percent early this morning will lower into
the 40-45 percent range this afternoon.

.REST OF TODAY...

Sky/weather.........Sunny then becoming partly cloudy.
Temperature.........49 at ignition...Max 71.
RH..................65 percent at ignition...Min 39 percent.
Wind (20 ft)........Winds south at 15 mph at ignition...otherwise
                    Southwest winds 14 to 16 mph.
Chance of pcpn......0 percent.
Transport winds.....Southwest 21 to 23 mph.
Mixing height.......1500 ft AGL at ignition...otherwise 2300 ft
                    AGL.
Smoke dispersal.....Fair /29600 knot-ft/ at ignition. Max...good
                    /45900 knot-ft/.

TIME (CDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........5   5   5   4   4   3   7   10  14  26
Weather cov.....
Weather type....
Temp............49  51  54  58  62  65  68  70  70  69
RH..............65  63  59  53  47  43  40  39  41  46
20 FT wind dir..200 210 210 210 210 210 210 210 210 210
20 FT wind spd..15  15  17  17  17  17  17  17  16  15
20 FT wind gust.24  24  25  25  25  26  26  25  24  22
Mix hgt (kft)...1.5 1.6 1.6 1.8 1.9 1.9 2.1 2.2 2.3 1.8
Transp wind dir.220 210 220 220 220 220 220 220 220 210
Transp wind spd.22  22  22  22  21  22  22  22  23  23
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0
Vrate kt-ft/1K..30  31  31  33  34  37  41  43  46  36

.TONIGHT...

Sky/weather.........Partly cloudy then becoming mostly cloudy.
Temperature.........Min 53.
RH..................Max 100 percent.
Wind (20 ft)........Southwest winds 9 to 12 mph.
Chance of pcpn......10 percent.
Transport winds.....Southwest 17 to 22 mph decreasing to 15 to 17
                    mph overnight.
Mixing height.......300 ft AGL.
Smoke dispersal.....Fair (22500 knot-ft) early in the evening
                    decreasing to poor (5200 knot-ft) late in the
                    night.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........37  48  50  52  54  54  55  56  56  57  57  59
Weather cov.....
Weather type....
Temp............67  64  63  61  59  59  58  58  57  57  56  56
RH..............54  63  68  72  75  79  82  86  88  91  92  93
20 FT wind dir..200 200 200 200 200 200 200 200 210 210 210 210
20 FT wind spd..13  10  10  10  10  10  10  10  10  10  10  9
20 FT wind gust.18  16  16  15  15  15  15  14  14  13  13  13
Mix hgt (kft)...1.2 0.6 0.5 0.4 0.3 0.5 0.6 0.8 0.8 0.9 0.9 0.8
Transp wind dir.210 210 210 210 210 200 190 200 200 210 220 220
Transp wind spd.22  20  18  18  18  17  17  17  16  17  16  15
Chc of pcpn (%).10  10  10  10  10  10  10  10  10  10  10  10
Vrate kt-ft/1K..23  10  8   6   5   7   9   12  12  13  13  10

.TUESDAY...

Sky/weather.........Mostly cloudy. Slight chance of showers and
                    thunderstorms early in the afternoon. Chance of
                    showers and thunderstorms late in the
                    afternoon.
Temperature.........Max 57.
RH..................Min 78 percent.
Wind (20 ft)........Southwest winds 8 to 9 mph shifting to the
                    north around 10 mph late in the afternoon.
                    Gusty and erratic winds expected near
                    thunderstorms in the afternoon.
Chance of pcpn......40 percent.
Transport winds.....Southwest around 12 mph shifting to the
                    northwest early in the morning, then shifting
                    to the north around 7 mph late in the
                    afternoon.
Mixing height.......2400 ft AGL.
Smoke dispersal.....Poor (2400 knot-ft) early in the morning
                    increasing to fair (14500 knot-ft) in the
                    afternoon.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........60  62  63  64  66  64  63  62  60  58  56  63
Weather cov.....                            SCH SCH SCH CHC CHC
Weather type....                            RW  RW  RW  RW  RW
Temp............55  54  55  55  56  56  56  56  56  56  55  54
RH..............92  95  100 98  89  85  83  80  79  78  79  82
20 FT wind dir..220 220 230 250 260 270 280 280 300 330 350 000
20 FT wind spd..9   8   9   9   9   9   9   9   10  10  10  12
20 FT wind gust.13  13  13  13  13  14  15  15  16  16  16  16
Mix hgt (kft)...0.7 0.6 0.8 0.9 1.1 1.3 1.6 1.8 0.4 1.4 2.4 1.9
Transp wind dir.210 250 300 270 300 330 330 330 350 350 000 000
Transp wind spd.12  12  10  9   9   8   8   7   8   7   7   7
Chc of pcpn (%).0   0   0   0   0   0   0   20  20  20  40  40
Vrate kt-ft/1K..7   6   7   7   8   9   11  12  2   9   15  11

$$
Forecaster...Ratzer
Requested by...Nathaniel Orsburn
Type of request...PRESCRIBED
.TAG 2605154.0/LOT
.DELDT 03/09/26
.FormatterVersion 2.0.0