726
FNUS73 KLSX 181320
FWSLSX

Spot Forecast for Mark Twain Lake...U.S. Army Corps of Engineers
National Weather Service Saint Louis MO
820 AM CDT Wed Sep 18 2024

Forecast is based on ignition time of 1100 CDT on September 18.
If conditions become unrepresentative, contact the
National Weather Service.

.DISCUSSION...

Thin, high clouds are moving over the burn site currently, and are
expected to increase in thickness and coverage through the day.
Winds will be light and southerly at ignition, gradually becoming
slightly southeasterly through the late afternoon. Temperatures at
ignition are expected to be in the low 80s, warming to around 90
this afternoon. If the high clouds end up being thicker and
greater in coverage than expected, then high temperatures this
afternoon may be a degree or two cooler than forecast. No rain is
expected at the burn site today.

.REST OF TODAY...

Sky/weather.........Mostly sunny (25-35 percent).
Chance of pcpn......0 percent.
LAL.................No Tstms.
Temperature.........84 at ignition...Max 91.
RH..................48 percent at ignition...Min 33 percent.
Wind (20 ft)........Winds south at 4 mph at ignition...otherwise
                    Light winds becoming south around 5 mph in the
                    afternoon.
Eye level winds.....Winds south at or less than 5 mph at ignition and
through the afternoon.
Haines Index........4 or low potential for large plume dominated
                    fire growth at ignition...max 5.
Mixing height.......2900 ft AGL at ignition...otherwise max 6600 ft
                    AGL.
Transport winds.....South 6 to 7 mph.
Smoke dispersal.....Poor /2750 m/s-m/ at ignition. Max...marginal
                    /5920 m/s-m/.

TIME (CDT)      11 AM  1 PM   3 PM   5 PM   7 PM   9 PM
Sky (%).........27     30     37     41     43     25
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............84     90     91     91     85     76
RH..............48     37     36     33     41     58
20 ft wind......S 4    S 5    S 5    S 5    S 4    SE 3
20 ft wind gust.8      8      8      9      9      9
Eye level wind..S 2    S 2    S 2    S 2    S 2    SE 1
Eye lvl wnd gst.4      4      4      4      4      4
Mix hgt (kft)...2.9    6.5    6.2    5.6    0.4    0.4
Transport wind..SW 7   S 6    S 7    S 7    S 8    S 8
Haines index....4      5      5      5      5      4
Vrate kt-ft/1K..18     33     37     34     3      3
Ventrate Cat....POOR   POOR   POOR   POOR   POOR   POOR

$$
Forecaster...Elmore
Requested by...Aaron Eckelkamp
Type of request...PRESCRIBED
.TAG 2422663.0/LSX
.DELDT 09/18/24
.FormatterVersion 2.0.0