072
FNUS73 KLSX 031258
FWSLSX

Spot Forecast for ICC Prairie...St, Charles Count Parks
National Weather Service Saint Louis MO
758 AM CDT Thu Oct 3 2024

Forecast is based on ignition time of 1200 CDT on October 03.
If conditions become unrepresentative, contact the
National Weather Service.

.DISCUSSION...

At ignition, expect light southeasterly winds, RH values between
45-50% and mixing heights of 1700 ft AGL. Winds will increase from
the southeast through the afternoon. During peak heating this
afternoon, minimum RH values are expected to be between 35-40%.
Mixing heights this afternoon will be around 3100 ft AGL.
Southeasterly winds will decrease shortly after sun down.

.REST OF TODAY...

Sky/weather.........Sunny (0-5 percent).
Chance of pcpn......0 percent.
LAL.................No Tstms.
Temperature.........75 at ignition...Max 83.
RH..................45 percent at ignition...Min 36 percent.
Wind (20 ft)........Winds southeast at 5 mph at
                    ignition...otherwise Southeast winds 5 to 7
                    mph.
Eye level winds.....Winds southeast at 2 mph at
                    ignition...otherwise Southeast winds 2 to 3
                    mph using an adjustment factor of 0.4.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth at ignition...max 5.
Mixing height.......1700 ft AGL at ignition...otherwise max 3100 ft
                    AGL.
Transport winds.....South 8 to 13 mph.
Smoke dispersal.....Poor /2040 m/s-m/ at ignition. Max...marginal
                    /5670 m/s-m/.

TIME (CDT)      12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P 11P
Sky (%).........0   0   0   1   1   2   2   3   4   5   7   7
Weather cov.....
Weather type....
Tstm cov........
CWR.............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
Temp............75  79  82  83  82  80  75  72  69  67  66  64
RH..............45  41  37  36  37  39  48  53  59  63  65  70
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
20 FT wind spd..5   6   7   7   7   7   6   6   6   5   5   5
20 FT wind gust.10  10  10  11  11  11  11  11  11  11  11  10
Eye lvl wnd dir.SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE  SE
Eye lvl wnd spd.2   3   3   3   3   3   3   3   3   2   2   2
Eye lvl wnd gst.5   5   5   5   5   5   5   5   5   5   5   5
Mix hgt (kft)...1.7 2.4 2.9 3.1 3.1 2.2 0.7 0.4 0.4 0.4 0.4 0.4
Transp wind dir.S   S   S   S   S   S   S   SE  SE  S   S   S
Transp wind spd.8   10  12  12  13  12  10  10  12  12  12  12
Haines index....5   5   5   5   5   5   5   5   5   4   4   4
Vrate kt-ft/1K..13  23  29  33  36  23  9   5   6   6   6   6
Ventrate Cat....PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR  PR

$$
Forecaster...MMG
Requested by...Chuck Collins
Type of request...PRESCRIBED
.TAG 2423504.0/LSX
.DELDT 10/03/24
.FormatterVersion 2.0.0