Suppression Forecast
Issued by NWS Chicago, IL

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000
FNUS73 KLOT 211018
FWSLOT

Spot Forecast for Spring Bluff/Chiwaukee...Lake County Forest Preserve
National Weather Service Chicago IL
418 AM CST Tue Nov 21 2017

Forecast is based on ignition time of 0900 CST on November 21.
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 strong cold front will move across the area today. Breezy west
winds will become northwest with and behind the front beginning
mid to late morning, not long after scheduled ignition time. Gusts
behind the front have been around 30 mph or so. Temperatures
will fall through the afternoon and mixing heights will increase to
above 3000 feet. Wednesday will be cold but with lighter west to southwest
winds, and will still have decent mixing heights.

.TODAY...

Sky/weather.........Mostly cloudy, clearing late.
Temperature.........41 at ignition...Max 41.
RH..................65 percent at ignition...Min 56 percent.
Wind (20 ft)........Winds west at 13 mph at ignition...otherwise
                    Northwest winds 13 to 15 mph. Gusts up to 30
                    mph.
Chance of pcpn......10 percent.
LAL.................No Tstms.
Mixing height.......2800 ft AGL at ignition...otherwise 2800
                    ft AGL increasing to 4200 ft AGL in the
                    late morning and afternoon.
Transport winds.....Northwest 25 to 29 mph.
MIXING TEMP 1700FT..35.
Smoke dispersal.....Excellent /64100 knot-ft/ at ignition.
                    Max...excellent /64100 knot-ft/ increasing to
                    excellent (108000 knot-ft).

TIME (CST)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........80  83  85  88  77  67  56  51  45
WEATHER COV.....
WEATHER TYPE....
TEMP............41  40  40  39  38  37  36  35  33
RH..............65  64  62  62  59  56  56  56  61
20 FT WIND DIR..W   W   NW  NW  NW  NW  NW  NW  NW
20 FT WIND SPD..13  13  14  14  15  15  15  14  13
20 FT WIND GUST.30  30  30  30  30  30  30  30  25
MIX HGT (KFT)...2.8 3.5 3.6 4.2 4.0 3.8 3.8 4.0 4.5
TRANSP WIND DIR.290 300 300 300 300 310 310 310 320
TRANSP WIND SPD.26  25  26  28  28  29  29  28  28
CHC OF PCPN (%).10  10  10  10  10  0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1
VRATE KT-FT/100064  76  88  100 114 131 135 119 108

.WEDNESDAY...

Sky/weather.........Mostly sunny then becoming partly cloudy.
Temperature.........Max 34.
RH..................Min 47 percent.
Wind (20 ft)........Southwest winds 6 to 7 mph.
Chance of pcpn......0 percent.
LAL.................No Tstms.
Mixing height.......2100-3200 ft AGL.
Transport winds.....West 8 to 13 mph.
MIXING TEMP 1700FT..30.
Smoke dispersal.....Fair (17300 knot-ft).

TIME (CST)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........12  13  14  14  12  8   6   11  21  26  30  38
WEATHER COV.....
WEATHER TYPE....
TEMP............23  23  24  26  28  29  31  33  34  34  33  32
RH..............71  71  71  65  60  58  53  49  47  47  49  51
20 FT WIND DIR..NW  NW  NW  NW  W   W   W   W   W   SW  SW  SW
20 FT WIND SPD..6   6   6   6   6   6   6   6   6   6   6   6
20 FT WIND GUST.10  10  10  10  10  10  10  10  10  10  10
MIX HGT (KFT)...2.1 2.2 2.3 2.5 2.6 2.8 3.0 3.1 3.2 3.1 2.8 2.4
TRANSP WIND DIR.320 320 320 310 300 270 260 260 250 250 250 250
TRANSP WIND SPD.13  12  9   8   8   8   8   9   9   10  12  12
CHC OF PCPN (%).0   0   0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
VRATE KT-FT/100024  22  19  17  19  20  21  25  25  28  28  24

$$
Forecaster...DONOFRIO
Requested by...Leslie Berns
Type of request...PRESCRIBED
.TAG 1719059.0/LOT


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