Spot Forecast
Issued by NWS La Crosse, WI

000
FNUS73 KARX 181847
FWSARX

Spot Forecast for Hx burn...Wisconsin DNR
National Weather Service La Crosse WI
147 PM CDT Thu Apr 18 2024

Forecast is based on ignition time of 0800 CDT on April 20.
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...

Cool and breezy conditions are expected on Saturday with dry
weather. Northwest winds in the 10 to 15 mph range are likely with
RH falling to near 35 percent by afternoon. However, some
adjustments in forecast are likely over the next day, so please
feel free to submit an additional forecast request around the day
of the burn.

.SATURDAY...

Sky/weather.........Partly sunny (50-60 percent).
CWR.................0 percent.
Temperature.........31 at ignition...Max 47.
RH..................66 percent at ignition...Min 37 percent.
Wind (20 ft)........Winds northwest at 11 mph at
                    ignition...otherwise Northwest winds 11 to 12
                    mph.
Mixing height.......2800 ft AGL at ignition...otherwise 4600 ft AGL
                    increasing to 5400 ft AGL in the afternoon.
Transport winds.....Northwest 18 to 22 mph.
Smoke dispersal.....Good /50000 knot-ft/ at ignition.
                    Max...excellent /97300 knot-ft/.
Haines Index........2 or very low potential for large plume
                    dominated fire growth at ignition...max 3.

TIME (CDT)      8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........62     71     74     64     41
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0
Temp............31     36     39     43     46
RH..............66     56     50     43     38
20 ft wind......NW 11  NW 12  NW 12  NW 12  NW 12
20 ft wind gust.18     19     19     20     20
Mix hgt (ft)....2800   4400   4900   5200   5400
Transport wind..NW 21  NW 22  NW 21  NW 20  NW 21
Haines index....2      2      2      3      3
SDspl kt-ft/100050     84     88     88     97

.SATURDAY NIGHT...

Sky/weather.........Mostly clear (10-20 percent).
CWR.................0 percent.
Temperature.........Min 28.
RH..................Max 75 percent.
Wind (20 ft)........West winds 8 to 11 mph.
Mixing height.......600 ft AGL decreasing to 400 ft AGL in the late
                    evening and overnight.
Transport winds.....West 12 to 15 mph.
Smoke dispersal.....Good (31800 knot-ft) early in the evening
                    decreasing to poor (4300 knot-ft) late in the
                    night.
Haines Index........3 to 4 or very low to low potential for large
                    plume dominated fire growth.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........24     12     4      3      2      2
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Temp............46     42     36     33     31     29
RH..............40     44     54     61     66     72
20 ft wind......W 11   W 9    W 8    W 8    W 8    W 8
20 ft wind gust.18     14     13     13     13     12
Mix hgt (ft)....2400   800    400    400    500    500
Transport wind..W 15   W 13   W 12   W 12   W 12   W 13
Haines index....3      4      4      4      4      4
SDspl kt-ft/100032     9      4      5      5      5

.SUNDAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Temperature.........Max 57.
RH..................Min 30 percent.
Wind (20 ft)........West winds 8 to 17 mph. Gusts up to 30 mph.
Mixing height.......2400 ft AGL increasing to 4900 ft AGL late in
                    the morning, then increasing to 7100 ft AGL
                    late in the afternoon decreasing to 5000 ft AGL
                    late in the afternoon.
Transport winds.....West 12 to 21 mph increasing to 22 to 25 mph
                    late in the morning.
Smoke dispersal.....Poor (4900 knot-ft) early in the morning
                    increasing to excellent (155100 knot-ft) in the
                    afternoon.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (CDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........2      2      3      4      4      3
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Temp............28     34     45     51     55     57
RH..............75     66     49     39     34     30
20 ft wind......W 8    W 9    W 12   W 16   W 17   W 17
20 ft wind gust.12     14     18     23     27     26
Mix hgt (ft)....500    1400   3300   4900   6200   7100
Transport wind..W 12   W 15   W 21   W 24   W 25   W 25
Haines index....4      4      4      4      4      4
SDspl kt-ft/10005      19     60     103    135    155

$$
Forecaster...JM
Requested by...Samuel Schuler
Type of request...PRESCRIBED
.TAG 2411341.0/ARX
.DELDT 04/18/24
.FormatterVersion 2.0.0
.EMAIL Samuel.schuler@wisconsin.gov