Spot Forecast
Issued by NWS Chicago, IL
Issued by NWS Chicago, IL
626
FNUS73 KLOT 061122
FWSLOT
Spot Forecast for Midewin Westside Fall RX...USFS
National Weather Service Chicago IL
522 AM CST Thu Nov 6 2025
Forecast is based on ignition time of 0600 CST on November 06.
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...
Dry conditions are expected today with RH values falling to around
25 percent this afternoon. Calm/light and variable winds this
morning will be southerly this afternoon with gusts up to 20 mph
with mixing heights initially slow to rise due to the cool start.
Clouds will increase this afternoon ahead of the next weather
system. This will bring showers and even a few thunderstorms to
the area tonight. Any precipitation will be fairly brief, with
shows ending by early Friday morning. Breezy westerly winds are
forecast on Friday with higher RH values compared to today.
.TODAY...
Sky/weather.........Partly cloudy then becoming mostly cloudy.
Temperature.........30 at ignition (6 AM)...Max 60.
RH..................94 percent at ignition (6 AM)...Min 25 percent.
Wind (20 ft)........Winds south at 2 mph at ignition (6 AM)...otherwise
Light winds becoming south around 10 mph.
Chance of pcpn......0 percent.
Transport winds.....South 3 to 8 mph increasing to 13 to 17 mph.
Mixing height.......Less than 400 ft AGL at ignition (6 AM)...
otherwise 2900 ft AGL.
Smoke dispersal.....Poor /1200 knot-ft/ at ignition. Max...good
/43700 knot-ft/.
TIME (CST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........43 44 46 47 47 46 45 51 57 63 69 75
Weather cov.....
Weather type....
Temp............30 32 38 45 51 55 58 59 60 60 58 55
RH..............94 86 68 50 38 32 28 26 25 25 27 32
20 FT wind dir..170 170 150 150 150 160 170 170 180 180 170 160
20 FT wind spd..2 2 2 3 6 8 10 12 12 12 10 10
20 FT wind gust. 7 12 15 17 18 18 18 18
Mix hgt (kft)...0.4 0.4 0.3 0.5 1.0 1.8 2.4 2.8 2.9 2.9 1.0 0.6
Transp wind dir.180 170 150 150 150 160 170 170 180 180 170 160
Transp wind spd.3 3 3 5 8 10 14 15 17 17 14 13
Chc of pcpn (%).0 0 0 0 0 0 0 0 0 0 0 0
Vrate kt-ft/1K..1 1 1 2 7 16 29 36 44 44 12 7
.TONIGHT...
Sky/weather.........Cloudy. Slight chance of rain showers in the
evening, then rain showers and slight chance of
thunderstorms overnight.
Temperature.........Min 49.
RH..................Max 100 percent.
Wind (20 ft)........South winds 9 to 12 mph increasing to 13 to 16
mph with gusts to around 30 mph in the late
evening and overnight, then shifting to the
southwest around 12 mph early in the morning.
Gusty and erratic winds expected near
thunderstorms overnight.
Chance of pcpn......90 percent.
Transport winds.....South 16 to 21 mph shifting to the southwest
early in the morning.
Mixing height.......500 ft AGL.
Smoke dispersal.....Fair (17400 knot-ft) early in the evening
decreasing to poor (7400 knot-ft) late in the
night.
TIME (CST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........81 85 90 94 95 96 97 98 99 100 99 97
Weather cov..... SCH SCH SCH DEF DEF DEF LKY LKY LKY
Weather type.... RW RW RW RW RW RW RW RW RW
Temp............52 51 51 51 51 51 51 51 49 50 51 51
RH..............38 42 45 47 47 48 50 57 70 81 88 95
20 FT wind dir..160 160 170 180 180 190 190 190 200 210 220 230
20 FT wind spd..10 12 13 15 16 17 17 17 16 15 14 13
20 FT wind gust.18 21 23 25 28 29 30 29 26 24 22 21
Mix hgt (kft)...0.6 0.5 0.5 0.6 0.6 0.7 0.5 0.8 0.9 0.7 0.8 0.6
Transp wind dir.160 160 170 180 180 180 190 190 200 210 220 230
Transp wind spd.16 17 21 21 22 22 23 23 21 18 20 16
Chc of pcpn (%).0 0 0 20 20 20 90 90 90 70 70 70
Vrate kt-ft/1K..8 7 8 10 11 13 11 17 17 12 13 9
.FRIDAY...
Sky/weather.........Mostly cloudy then becoming partly cloudy.
Slight chance of rain showers early in the
morning.
Temperature.........Max 65.
RH..................Min 43 percent.
Wind (20 ft)........West winds 12 to 15 mph with gusts to around 28
mph.
Chance of pcpn......20 percent.
Transport winds.....Southwest 15 to 18 mph increasing to west 21 to
24 mph late in the morning, then increasing to
26 to 29 mph early in the afternoon..
Mixing height.......5500 ft AGL.
Smoke dispersal.....Poor (8100 knot-ft) early in the morning
increasing to excellent (77600 knot-ft) in the
afternoon increasing to good (38300 knot-ft)
early in the morning increasing to excellent
(127200 knot-ft) in the afternoon in the
afternoon.
TIME (CST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........96 93 69 43 23 21 19 20 21 22 22 23
Weather cov.....SCH SCH SCH
Weather type....RW RW RW
Temp............52 52 55 57 60 62 64 65 65 64 62 59
RH..............99 100 90 79 68 60 53 48 44 43 46 52
20 FT wind dir..240 250 260 260 260 260 260 260 270 270 270 270
20 FT wind spd..13 13 14 14 15 16 16 17 17 16 15 13
20 FT wind gust.20 21 21 22 23 24 25 28 28 28 24 21
Mix hgt (kft)...0.6 0.9 1.2 1.7 2.2 2.8 3.8 4.6 5.0 5.5 3.9 2.3
Transp wind dir.230 240 250 260 260 260 260 260 270 270 270 270
Transp wind spd.15 16 18 21 21 22 24 29 29 26 23 20
Chc of pcpn (%).20 20 20 10 10 10 0 0 0 0 0 0
Vrate kt-ft/1K..8 12 19 31 40 53 78 112 127 127 79 38
$$
Forecaster...Carlaw
Requested by...Jesse Hoh
Type of request...PRESCRIBED
.TAG 2525050.2/LOT
.DELDT 11/06/25
.FormatterVersion 2.0.0