Text Products for FWS Issued by LSX

Spot Forecast
Issued by NWS St. Louis, MO
Versions: 1
000
FNUS73 KLSX 091145
FWSLSX

Spot Forecast for Mark Twain Lake...U.S. Army Corps of Engineers
National Weather Service Saint Louis MO
645 AM CDT Tue Apr 9 2024

Forecast is based on ignition time of 1000 CDT on April 09.
If conditions become unrepresentative, contact the
National Weather Service.

.DISCUSSION...
Conditions will be dry with minimum RH values in the low 30s during
the afternoon and temperatures several degrees cooler than yesterday.
Mixing heights will increase above 1000 ft around 10 am this morning,
mixing to around 4,500 ft by mid afternoon. Northwesterly winds will
be less than 10 mph at 20 ft, gradually becoming northerly this evening.
High clouds will persist across the region today but will not limit
mixing or smoke dispersion.

.REST OF TODAY...

Sky/weather.........Mostly sunny (25-35 percent).
Chance of pcpn......0 percent.
LAL.................No Tstms.
Temperature.........53 at ignition...Max 67.
RH..................59 percent at ignition...Min 36 percent.
Wind (20 ft)........Winds north at 6 mph at ignition...otherwise
                    Northwest winds 5 to 6 mph in the late morning
                    and afternoon becoming light.
Eye level winds.....2-3 mph with an adjustment factor of 0.4.
Haines Index........4 or low potential for large plume dominated
                    fire growth at ignition...max 5.
Mixing height.......1700 ft AGL at ignition...otherwise max 4600 ft
                    AGL.
Transport winds.....Northwest 9 to 12 mph.
Smoke dispersal.....Poor /2700 m/s-m/ at ignition. Max...fair /6520
                    m/s-m/.

TIME (CDT)      10 AM  NOON   2 PM   4 PM   6 PM   8 PM
Sky (%).........43     27     17     13     26     24
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............53     60     65     66     67     61
RH..............59     46     38     37     37     46
20 ft wind......N 6    NW 5   NW 5   NW 5   N 4    NE 4
20 ft wind gust.12     10     12     10     8      6
Eye level wind..N 3    NW 2   NW 2   NW 2   N 2    NE 2
Eye lvl wnd gst.6      5      6      5      4      3
Mix hgt (kft)...1.7    2.7    3.8    4.6    4.3    0.5
Transport wind..NW 12  W 10   W 12   NW 9   NW 8   N 8
Haines index....4      4      4      5      5      5
Vrate kt-ft/1K..17     24     38     37     30     4
Ventrate Cat....POOR   POOR   POOR   POOR   POOR   POOR

$$
Forecaster...MRM
Requested by...Aaron Eckelkamp
Type of request...PRESCRIBED
.TAG 2410031.0/LSX
.DELDT 04/09/24
.FormatterVersion 2.0.0
National Weather Service Weather Forecast Office
