133
FNUS73 KLSX 191018
FWSLSX

Spot Forecast for Hi Point WSG unit...Missouri Department of Conservation
National Weather Service Saint Louis MO
518 AM CDT Thu Sep 19 2024

Forecast is based on ignition time of 1100 CDT on September 19.
If conditions become unrepresentative, contact the
National Weather Service.

.DISCUSSION...
Hot today with temperatures in the low 80s at ignition, warming up
to near 90 by this afternoon and relative humidity dropping to around
40 percent. Scattered diurnal cumulus developing this afternoon, then
diminishing by sunset. No rain is expected at the burn site today, but
could see isolated showers and a few storms develop after 4 am Friday
morning.

.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent).
Chance of pcpn......0 percent.
LAL.................No Tstms.
Temperature.........81 at ignition...Max 89.
RH..................53 percent at ignition...Min 40 percent.
Wind (20 ft)........Winds south at 2 mph at ignition...otherwise
                    Light winds.
Eye level winds.....Winds south at 1 mph at ignition...otherwise
                    Light winds. Adjustment factor used 0.4.
Haines Index........4 or low potential for large plume dominated
                    fire growth at ignition...max 5.
Mixing height.......4000 ft AGL at ignition...otherwise max 5600 ft
                    AGL.
Transport winds.....Southwest 7 to 8 mph.
Smoke dispersal.....Poor /4350 m/s-m/ at ignition. Max...marginal
                    /5770 m/s-m/.

TIME (CDT)      11 AM  1 PM   3 PM   5 PM   7 PM   9 PM
Sky (%).........1      4      3      12     19     27
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
LAL.............1      1      1      1      1      1
Temp............81     87     88     87     83     75
RH..............53     42     40     44     51     69
20 ft wind......S 2    S 2    S 3    S 3    S 2    S 2
20 ft wind gust.6      7      8      8      7      9
Eye level wind..S 1    S 1    S 1    S 1    S 1    S 1
Eye lvl wnd gst.3      3      4      4      3      4
Mix hgt (kft)...4.0    5.2    5.6    5.1    0.4    0.2
Transport wind..S 8    S 8    SW 7   S 7    S 7    S 9
Haines index....4      5      5      5      5      5
Vrate kt-ft/1K..28     37     34     31     2      2
Ventrate Cat....POOR   POOR   POOR   POOR   POOR   POOR

.TONIGHT...

Sky/weather.........Mostly clear (20-30 percent). Slight chance of
                    showers and thunderstorms early in the morning.
Chance of pcpn......20 percent.
LAL.................No Tstms until 0500, then 9-15 strikes.
Temperature.........Min 67.
RH..................Max 95 percent.
Wind (20 ft)........Light winds. Gusty and erratic winds expected
                    near thunderstorms early in the morning.
Eye level winds.....Light winds. Gusty and erratic winds expected
                    near thunderstorms early in the morning.
                    Adjustment factor used 0.4.
Haines Index........3 to 5 or very low to moderate potential for
                    large plume dominated fire growth.
Mixing height.......Min 200 ft AGL.
Transport winds.....South 7 to 13 mph.
Smoke dispersal.....Poor (300 m/s-m).

.FRIDAY...

Sky/weather.........Mostly sunny (40-50 percent). Chance of showers
                    early in the morning. Slight chance of
                    thunderstorms early in the morning. Slight
                    chance of showers early in the morning.
Chance of pcpn......30 percent.
LAL.................9-15 strikes until 1000, then No Tstms.
Temperature.........Max 90.
RH..................Min 54 percent.
Wind (20 ft)........Light winds. Gusty and erratic winds expected
                    near thunderstorms early in the morning.
Eye level winds.....Light winds. Gusty and erratic winds expected
                    near thunderstorms early in the morning.
                    Adjustment factor used 0.4.
Haines Index........3 to 4 or very low to low potential for large
                    plume dominated fire growth.
Mixing height.......Max 4400 ft AGL.
Transport winds.....Southwest 8 to 14 mph.
Smoke dispersal.....Poor (380 m/s-m) early in the morning
                    increasing to marginal max (5550 m/s-m) in the
                    afternoon.

$$
Forecaster...Byrd
Requested by...David Shieh
Type of request...PRESCRIBED
.TAG 2422702.0/LSX
.DELDT 09/19/24
.FormatterVersion 2.0.0