Spot Forecast
Issued by NWS La Crosse, WI

000
FNUS73 KARX 250903
FWSARX

Spot Forecast for Trout Valley Bench Rx...Minnesota DNR
National Weather Service La Crosse WI
403 AM CDT Thu Apr 25 2024

Forecast is based on ignition time of 0900 CDT on April 25.
If conditions become unrepresentative...contact the National Weather
Service.

Please contact our office at (608) 784-8292 if you have questions
or concerns with this forecast.

.DISCUSSION...

High pressure overhead today resulting in sunny skies and dry
conditions. An approaching weather system to our west will help to
increase southeasterly winds today, however winds may be lighter
and/or more variable than forecasted due to the location being in
a valley. With lighter winds in the morning, fair smoke dispersal
is expected. Minimum relative humidity values in the afternoon
will be around 30 percent. Winds will also increase overnight
into Friday as the system gets closer. Wet and windy conditions
for Friday are expected.

.REST OF TODAY...

Sky/weather.........Sunny (15-25 percent).
CWR.................0 percent.
Temperature.........46 at ignition...Max 63.
RH..................55 percent at ignition...Min 29 percent.
Wind (20 ft)........Winds south at 9 mph at ignition...otherwise
                    Southeast winds 9 to 12 mph.
Mixing height.......1200 ft AGL at ignition...otherwise 2400 ft AGL
                    increasing to 5000 ft AGL in the afternoon.
Transport winds.....South 15 to 20 mph.
Smoke dispersal.....Fair /16000 knot-ft/ at ignition.
                    Max...excellent /77100 knot-ft/.
Haines Index........4 or low potential for large plume dominated
                    fire growth at ignition...max 5.

TIME (CDT)      9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........29  11  14  20  13  11  12  11  15
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0
Temp............46  52  56  58  60  62  63  63  63
RH..............55  46  42  37  33  30  30  30  29
20 FT wind dir..S   S   S   SE  SE  SE  SE  SE  SE
20 FT wind spd..9   9   10  10  11  11  12  12  12
20 FT wind gust.13  14  15  15  16  16  18  18  19
Mix hgt (kft)...1.2 1.6 2.4 4.0 4.6 4.9 5.0 4.6 4.5
Transp wind dir.S   S   S   S   S   S   S   S   S
Transp wind spd.15  15  16  17  17  17  17  18  20
Haines index....4   4   4   4   5   5   5   5   5
SDspl kt-ft/100016  20  34  59  70  73  75  74  77

.TONIGHT...

Sky/weather.........Partly cloudy (25-35 percent) then becoming
                    mostly cloudy (60-70 percent). Slight chance of
                    rain showers after 3 am. Chance of rain showers
                    early in the morning.
CWR.................10 percent increasing to 30 percent after 3 am.
Temperature.........Min 45.
RH..................Max 60 percent.
Wind (20 ft)........Southeast winds 11 to 18 mph. Gusts up to 30
                    mph in the late evening and overnight.
Mixing height.......4200 ft AGL decreasing to 500 ft AGL.
Transport winds.....Southeast 15 to 20 mph.
Smoke dispersal.....Excellent (72100 knot-ft) early in the evening
                    decreasing to poor (6900 knot-ft) late in the
                    night.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........20     37     31     52     56     68
Weather cov.....                                   S CHC
Weather type....NONE   NONE   NONE   NONE   NONE   RNSHWR
Tstm cov........
CWR.............0      0      0      0      10     20
Temp............63     59     53     51     49     46
RH..............27     33     43     44     50     58
20 ft wind......SE 12  SE 11  SE 13  SE 16  SE 17  SE 17
20 ft wind gust.18     16     21     23     25     26
Mix hgt (ft)....4200   600    500    600    600    800
Transport wind..S 20   SE 16  SE 16  SE 17  SE 18  SE 20
Haines index....5      5      5      5      4      4
SDspl kt-ft/100072     9      7      9      10     13

.FRIDAY...

Sky/weather.........Mostly cloudy (80-90 percent). Rain showers
                    likely in the morning, then rain showers and
                    chance of thunderstorms in the afternoon.
CWR.................90 percent.
Temperature.........Max 58.
RH..................Min 56 percent.
Wind (20 ft)........Southeast winds 18 to 19 mph with gusts to
                    around 30 mph. Gusty and erratic winds expected
                    near thunderstorms.
Mixing height.......2500 ft AGL.
Transport winds.....Southeast 22 to 31 mph increasing to 31 to 35
                    mph in the afternoon.
Smoke dispersal.....Fair (17000 knot-ft) early in the morning
                    increasing to excellent (75500 knot-ft) in the
                    afternoon.
Haines Index........3 to 4 or very low to low potential for large
                    plume dominated fire growth.

TIME (CDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........86     77     93     92     90     88
Weather cov.....CHANCE LIKELY LIKELY LIKELY DEFNTE DEFNTE
Weather type....RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR
Tstm cov........                            S CHC  CHANCE
CWR.............40     70     70     70     90     90
Temp............46     45     49     51     52     55
RH..............60     65     61     61     66     61
20 ft wind......SE 19  SE 18  SE 19  SE 19  SE 19  SE 18
20 ft wind gust.28     29     29     29     30     30
Mix hgt (ft)....900    1500   1700   2200   2400   2200
Transport wind..SE 22  SE 25  SE 29  SE 33  SE 33  SE 31
Haines index....4      4      4      4      3      3
SDspl kt-ft/100017     33     43     63     70     59

$$
Forecaster...JRC
Requested by...Zach Dieterman
Type of request...PRESCRIBED
.TAG 2412258.0/ARX
.DELDT 04/25/24
.FormatterVersion 2.0.0
.EMAIL zach.dieterman@state.mn.us