584
FNUS73 KILX 251418
FWSILX

Spot Forecast for Sangchris Lake SP...Illinois DNR
National Weather Service Lincoln IL
818 AM CST Tue Feb 25 2025

Forecast is based on ignition time of 0900 CST on February 25.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office at (217) 732-3089 if you have questions
or concerns with this forecast.

.DISCUSSION...

Winds will be out of the northwest today around 10-12 mph at
ignition but diminishing below 10 mph by late in the afternoon.
The light winds will result in poor vent rates today despite the
relatively deep mixing expected to develop late this morning into
the afternoon. Sunny skies are expected today along with mild
temps as highs warm into the mid to upper 50s.

.REST OF TODAY...

Sky/weather.........Sunny (5-15 percent).
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Temperature.........46 at ignition...Max 57.
RH..................71 percent at ignition...Min 49 percent.
Wind (20 ft)........Winds northwest at 12 mph at
                    ignition...otherwise Northwest winds 5 to 9
                    mph.
Mixing height.......1200 ft AGL at ignition...otherwise 3500 ft
                    AGL.
Transport winds.....Northwest 6 to 13 mph.
Smoke dispersal.....Poor /13400 knot-ft/ at ignition. Max...Poor
                    /34100 knot-ft/.

TIME (CST)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........17  15  14  12  10  8   6   7   8
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0   0
Chc of thdr (%).0   0   0   0   0   0   0   0   0
Temp............46  49  50  54  56  57  57  56  53
RH..............71  67  66  59  53  51  49  51  54
20 FT wind dir..NW  NW  NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..12  12  12  10  10  10  8   8   8
20 FT wind gust.18  18  18  16  16  16  14  14  14
Mix hgt (kft)...1.2 1.5 1.8 2.3 3.2 3.4 3.5 3.3 0.7
Transp wind dir.NW  NW  NW  NW  NW  NW  NW  NW  NW
Transp wind spd.13  13  13  13  13  12  10  8   6
Vrate kt-ft/1K..13  17  21  26  34  34  32  24  4
Ventrate Cat....PR  PR  PR  PR  PR  PR  PR  PR  PR

.TONIGHT...

Sky/weather.........Partly cloudy (25-35 percent) then becoming
                    mostly cloudy (60-70 percent).
Chance of pcpn......10 percent.
Chance of thunder...3 percent.
Temperature.........Min 38.
RH..................Max 96 percent.
Wind (20 ft)........Light winds becoming south 5 to 8 mph in the
                    late evening and overnight.
Mixing height.......300 ft AGL.
Transport winds.....Northwest around 5 mph shifting to the south 6
                    to 15 mph early in the evening, then increasing
                    to 16 to 20 mph after 3 am.
Smoke dispersal.....Poor (1700 knot-ft).

TIME (CST)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........10  18  27  35  39  43  47  55  63  71  73  75
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   10  10  10  10  10  10
Chc of thdr (%).0   0   0   0   0   0   0   0   0   0   0   0
Temp............49  45  43  42  39  39  39  38  39  39  39  40
RH..............63  70  76  76  85  85  85  89  89  89  89  89
20 FT wind dir..SW  SW  SW  S   S   S   S   S   S   S   S   S
20 FT wind spd..3   3   3   7   7   7   8   8   8   10  10  10
20 FT wind gust.6   6   6   10  10  10  17  17  17  20  20  20
Mix hgt (kft)...0.4 0.4 0.4 0.3 0.3 0.3 0.4 0.4 0.4 0.5 0.5 0.5
Transp wind dir.NW  W   SW  S   S   S   S   S   S   S   S   S
Transp wind spd.5   5   6   8   10  12  14  15  15  16  17  20
Vrate kt-ft/1K..2   2   2   2   3   3   4   5   6   7   8   9
Ventrate Cat....PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

$$
Forecaster...Deubelbeiss
Requested by...Greg Fretueg
Type of request...PRESCRIBED
.TAG 2503791.0/ILX
.DELDT 02/25/25
.FormatterVersion 2.0.0
.EMAIL gregory.fretueg@illinois.gov