896
FNUS73 KILX 181326
FWSILX

Spot Forecast for Sand Ridge State Forest...IDNR
National Weather Service Lincoln IL
826 AM CDT Tue Mar 18 2025

Forecast is based on ignition time of 1000 CDT on March 18.
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 have shifted southerly and will gust from 25 to 35 mph during this
afternoon. Strong transport winds and deep mixing heights today through
Wednesday will yield favorable vent rates. On Wednesday wind gusts of
40 to 50 mph are forecast. A broken line of thunderstorm will move eastward
across the IL river valley during mid Wednesday afternoon, then expect the
rain to turn to snow showers during late Wednesday evening with less than
1 inch of snow expected into overnight Wednesday night.

.REST OF TODAY...

Sky/weather.........Mostly cloudy (65-75 percent).
Chance of pcpn......0 percent.
Chance of thunder...0 percent.
Temperature.........58 at ignition...Max 76.
RH..................58 percent at ignition...Min 37 percent.
Wind (20 ft)........Winds south at 12 mph at ignition...otherwise
                    South winds 7 to 13 mph with gusts to around 30
                    mph.
Mixing height.......900 ft AGL at ignition...otherwise 4500 ft AGL.
Transport winds.....South 18 to 26 mph increasing to 29 to 32 mph
                    in the afternoon.
Smoke dispersal.....Poor /14300 knot-ft/ at ignition. Max...Very
                    Good /111300 knot-ft/ increasing to Good (62300
                    knot-ft) early in the morning increasing to
                    Very Good (126400 knot-ft) in the afternoon
                    late in the afternoon.

TIME (CDT)      10 AM  NOON   2 PM   4 PM
Sky (%).........70     71     72     71
Weather cov.....
Weather type....NONE   NONE   NONE   NONE
Tstm cov........
Chc of pcpn (%).0      0      0      0
Chc of thdr (%).0      0      0      0
Temp............58     67     73     76
RH..............58     44     38     38
20 ft wind......S 12   S 16   S 16   S 16
20 ft wind gust.25     29     29     30
Mix hgt (ft)....900    2400   3800   4500
Transport wind..S 18   S 26   S 30   S 32
Vrate kt-ft/1K..14     56     98     126
Ventrate Cat....POOR   FAIR   GOOD   VYGD

.TONIGHT...

Sky/weather.........Mostly cloudy (65-75 percent).
Chance of pcpn......10 percent.
Chance of thunder...1 percent.
Temperature.........Min 56.
RH..................Max 77 percent.
Wind (20 ft)........South winds 9 to 12 mph with gusts to around 26
                    mph.
Mixing height.......600 ft AGL.
Transport winds.....South 18 to 23 mph.
Smoke dispersal.....Poor (10700 knot-ft).

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........66     68     79     81     73     55
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Chc of pcpn (%).0      0      0      0      10     10
Chc of thdr (%).0      0      0      0      0      0
Temp............74     70     65     63     61     58
RH..............39     46     54     58     61     69
20 ft wind......S 13   S 13   S 14   S 13   S 13   S 12
20 ft wind gust.26     26     26     26     26     25
Mix hgt (ft)....900    600    1100   1000   900    900
Transport wind..S 21   S 23   S 23   S 22   S 18   S 20
Vrate kt-ft/1K..17     12     22     19     14     15
Ventrate Cat....POOR   POOR   POOR   POOR   POOR   POOR

.WEDNESDAY...

Sky/weather.........Partly sunny (50-60 percent). Slight chance of
                    rain showers early in the afternoon. Slight
                    chance of thunderstorms early in the afternoon.
                    Chance of rain showers late in the afternoon.
Chance of pcpn......50 percent.
Chance of thunder...15 percent.
Temperature.........Max 67.
RH..................Min 58 percent.
Wind (20 ft)........South winds 9 to 17 mph. Gusts up to 30 mph
                    increasing to 45 mph in the late morning and
                    afternoon. Gusty and erratic winds expected
                    near thunderstorms early in the afternoon.
Mixing height.......6600 ft AGL.
Transport winds.....South 20 to 28 mph increasing to southwest 31
                    to 39 mph in the late morning and afternoon.
Smoke dispersal.....Poor (17800 knot-ft) early in the morning
                    increasing to Very Good (112600 knot-ft) in the
                    afternoon increasing to Very Good (143100
                    knot-ft) early in the morning increasing to
                    Excellent (217700 knot-ft) in the afternoon in
                    the afternoon.

TIME (CDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........52     55     62     54     49     47
Weather cov.....                     S CHC  CHANCE CHANCE
Weather type....NONE   NONE   NONE   RNSHWR RNSHWR RNSHWR
Tstm cov........                            S CHC
Chc of pcpn (%).10     10     0      20     40     50
Chc of thdr (%).0      10     0      10     20     10
Temp............57     57     60     64     64     61
RH..............75     75     71     63     58     59
20 ft wind......S 14   S 14   S 21   S 21   S 21   SW 22
20 ft wind gust.30     30     43     44     44     45
Mix hgt (ft)....1000   1400   2900   5200   6400   5200
Transport wind..S 20   S 23   S 31   S 37   S 39   SW 36
Vrate kt-ft/1K..18     28     77     165    218    161
Ventrate Cat....POOR   POOR   GOOD   EXNT   EXNT   EXNT

$$
Forecaster...07
Requested by...Sami Childerson
Type of request...PRESCRIBED
.TAG 2506899.0/ILX
.DELDT 03/18/25
.FormatterVersion 2.0.0
.EMAIL sami.childerson@illnois.gov