Text Products for FWS Issued by LOT

Spot Forecast
Issued by NWS Chicago, IL
Versions: 1 2

000
FNUS73 KLOT 211038
FWSLOT

Spot Forecast for Prairie Border North-West Unit Rx...The Nature Conservancy
National Weather Service Chicago IL
538 AM CDT Sun Apr 21 2024

Forecast is based on ignition time of 1000 CDT on April 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...Dry weather is expected through Monday afternoon.
Minimum relative humidity levels in the middle 20 percent range are
expected today and again Monday. Areas of frost will be possible
early this morning and again early Monday morning.

.REST OF TODAY...

Sky/weather.........Sunny.
Temperature.........45 at ignition...Max 58.
RH..................45 percent at ignition...Min 27 percent.
Wind (20 ft)........Winds west at 9 mph at ignition...otherwise
                    Northwest winds 9 to 13 mph.
Chance of pcpn......0 percent.
Transport winds.....Northwest 12 to 18 mph.
Mixing height.......4200 ft AGL at ignition...otherwise 6800 ft
                    AGL.
Smoke dispersal.....Good /42200 knot-ft/ at ignition.
                    Max...excellent /108100 knot-ft/.

TIME (CDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........2   3   3   3   4   5   6   7
Weather cov.....
Weather type....
Temp............45  48  51  54  55  57  58  58
RH..............45  40  36  32  31  28  27  28
20 FT wind dir..290 290 300 300 300 300 300 300
20 FT wind spd..9   10  12  12  12  13  13  12
20 FT wind gust.14  15  16  17  18  18  17  15
Mix hgt (kft)...4.2 4.8 5.3 5.8 6.2 6.5 6.8 4.9
Transp wind dir.320 320 310 310 300 300 300 300
Transp wind spd.12  13  15  15  17  16  18  17
Chc of pcpn (%).0   0   0   0   0   0   0   0
Vrate kt-ft/1K..42  52  68  76  92  93  108 73

.TONIGHT...

Sky/weather.........Clear. Areas of frost after 3 am.
Temperature.........Min 37.
RH..................Max 82 percent.
Wind (20 ft)........Northwest winds 6 to 8 mph shifting to the
                    southwest 5 to 6 mph in the late evening and
                    overnight.
Chance of pcpn......0 percent.
Transport winds.....Northwest around 17 mph becoming west 7 to 10
                    mph.
Mixing height.......300 ft AGL.
Smoke dispersal.....Good (43900 knot-ft) early in the evening
                    decreasing to poor (2400 knot-ft) late in the
                    night.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........9   10  11  11  12  12  11  10  7   4   1   2
Weather cov.....                                        ARS ARS
Weather type....                                        FST FST
Temp............57  53  49  46  44  43  41  40  39  38  37  37
RH..............29  35  42  49  55  60  65  70  73  79  82  82
20 FT wind dir..300 300 280 240 220 230 240 240 240 240 240 240
20 FT wind spd..9   8   7   6   5   5   5   5   5   5   5   5
20 FT wind gust.13  10  8   7   6   6   6   6   6   6   6   6
Mix hgt (kft)...2.9 1.0 0.5 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.3
Transp wind dir.300 300 310 300 260 260 260 260 260 260 260 260
Transp wind spd.17  10  8   7   7   8   8   10  10  10  9   9
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   0
Vrate kt-ft/1K..44  10  3   3   2   3   3   3   3   3   3   3

.MONDAY...

Sky/weather.........Mostly sunny then becoming partly cloudy. Areas
                    of frost early in the morning.
Temperature.........Max 66.
RH..................Min 28 percent.
Wind (20 ft)........Southwest winds 5 to 9 mph increasing to 13 to
                    15 mph.
Chance of pcpn......0 percent.
Transport winds.....West 7 to 10 mph increasing to southwest 20 to
                    22 mph.
Mixing height.......6300 ft AGL.
Smoke dispersal.....Poor (2100 knot-ft) early in the morning
                    increasing to excellent (81700 knot-ft) in the
                    afternoon increasing to excellent (78200
                    knot-ft) in the afternoon.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........2   2   2   2   2   5   8   11  22  33  44  48
Weather cov.....ARS
Weather type....FST
Temp............37  38  44  50  55  59  61  63  63  64  65  65
RH..............82  79  68  56  49  39  33  29  29  28  28  29
20 FT wind dir..240 240 240 240 230 230 230 230 230 220 220 220
20 FT wind spd..5   5   6   8   9   10  12  13  14  15  15  14
20 FT wind gust.6   6   8   10  13  14  16  17  20  21  22  21
Mix hgt (kft)...0.3 0.4 1.5 2.6 3.7 4.6 5.4 6.3 6.1 5.9 5.7 4.2
Transp wind dir.250 250 250 240 260 250 240 240 230 230 230 230
Transp wind spd.9   7   9   10  15  17  17  20  22  22  22  21
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0   0   0
Vrate kt-ft/1K..3   2   12  23  48  67  82  107 115 115 109 78

$$
Forecaster...Sullivan
Requested by...Stuart Orr
Type of request...PRESCRIBED
.TAG 2411562.0/LOT
.DELDT 04/21/24
.FormatterVersion 2.0.0
National Weather Service Weather Forecast Office
