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000
FNUS73 KARX 201128
FWSARX

Spot Forecast for Pershing H,X Burn...Wisconsin DNR
National Weather Service La Crosse WI
628 AM CDT Sat Apr 20 2024

Forecast is based on ignition time of 0700 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...Overall, despite occasional breaks in the clouds, a
mostly cloudy and cool day is expected with high temperatures
reaching only the low to mid 40s. A flurry or sprinkle cannot be
ruled out, but wetting precipitation is unlikely. Steady northwest
winds with occasional gusts to 20 mph will promote excellent smoke
dispersal by mid morning as mixing heights increase. RH looks to
drop towards 40 percent by afternoon, but given the dry air,
slightly lower RH is possible.

.REST OF TODAY...

Sky/weather.........Mostly cloudy (70-80 percent) then becoming
                    mostly sunny (45-55 percent). Chance of
                    flurries in the morning. Chance of sprinkles in
                    the late morning and afternoon.
CWR.................10 percent.
Temperature.........28 at ignition...Max 46.
RH..................71 percent at ignition...Min 41 percent.
Wind (20 ft)........Winds northwest at 10 mph at
                    ignition...otherwise Northwest winds 9 to 12
                    mph.
Mixing height.......1500 ft AGL at ignition...otherwise 3000 ft AGL
                    increasing to 5300 ft AGL in the late morning
                    and afternoon.
Transport winds.....Northwest 17 to 21 mph.
Smoke dispersal.....Fair /23000 knot-ft/ at ignition.
                    Max...excellent /95600 knot-ft/.
Haines Index........2 or very low potential for large plume
                    dominated fire growth at ignition...max 3.

TIME (CDT)      7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........75  81  83  87  88  82  81  75  69  62  48
Weather cov.....CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC
Weather type....SW  SW  SW  RS  RS  RW  RW  RW  RW  RW  RW
Tstm cov........
CWR.............10  10  10  10  10  10  10  10  10  10  10
Temp............28  29  32  35  36  38  39  41  42  44  44
RH..............71  72  63  56  54  52  50  48  44  43  41
20 FT wind dir..NW  NW  NW  NW  NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..10  9   10  10  10  10  11  11  11  12  11
20 FT wind gust.18  18  16  18  18  18  18  18  18  18  16
Mix hgt (kft)...1.5 3.0 3.5 4.3 4.5 4.8 4.9 5.1 5.3 5.2 5.3
Transp wind dir.NW  NW  NW  NW  NW  NW  NW  NW  NW  NW  NW
Transp wind spd.17  20  21  21  21  20  21  21  21  21  21
Haines index....2   2   2   2   2   2   3   3   3   3   3
SDspl kt-ft/100023  50  63  77  82  81  89  91  95  94  96

.TONIGHT...

Sky/weather.........Partly cloudy (25-35 percent) then becoming
                    clear (0-5 percent). Chance of sprinkles early
                    in the evening. Widespread frost overnight.
                    Widespread frost after 3 am.
CWR.................10 percent.
Temperature.........Min 27.
RH..................Max 75 percent.
Wind (20 ft)........West winds 5 to 9 mph.
Mixing height.......5100 ft AGL decreasing to 400 ft AGL.
Transport winds.....West 12 to 20 mph.
Smoke dispersal.....Excellent (86300 knot-ft) early in the evening
                    decreasing to poor (4200 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 (%).........38     29     47     15     0      0
Weather cov.....CHANCE                      WIDSPD WIDSPD
Weather type....RNSHWR NONE   NONE   NONE   FROST  FROST
Tstm cov........
CWR.............10     10     10     10     0      0
Temp............44     39     35     32     30     29
RH..............39     46     56     63     69     72
20 ft wind......NW 9   W 7    W 6    W 5    W 6    W 6
20 ft wind gust.16     14     12     11     12     12
Mix hgt (ft)....5100   600    400    400    400    400
Transport wind..NW 20  W 12   W 12   W 13   W 13   W 13
Haines index....3      4      4      4      4      4
SDspl kt-ft/100086     6      4      5      4      5

.SUNDAY...

Sky/weather.........Sunny (10-20 percent). Widespread frost early
                    in the morning.
CWR.................0 percent.
Temperature.........Max 57.
RH..................Min 29 percent.
Wind (20 ft)........West winds 6 to 12 mph. Gusts up to 23 mph late
                    in the morning.
Mixing height.......1600 ft AGL increasing to 3700 ft AGL late in
                    the morning, then increasing to 6500 ft AGL
                    late in the morning increasing to 7400 ft AGL
                    late in the afternoon decreasing to 5000 ft
                    AGL.
Transport winds.....West 14 to 23 mph.
Smoke dispersal.....Poor (5400 knot-ft) early in the morning
                    increasing to excellent (148300 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 (%).........4      6      9      17     23     21
Weather cov.....WIDSPD
Weather type....FROST  NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Temp............28     34     46     52     56     57
RH..............75     66     47     38     30     29
20 ft wind......W 6    W 8    W 10   NW 11  NW 12  W 12
20 ft wind gust.12     14     16     19     21     20
Mix hgt (ft)....400    1600   3700   5800   7200   6900
Transport wind..W 14   W 16   W 20   NW 22  NW 23  W 22
Haines index....4      4      4      4      4      4
SDspl kt-ft/10005      22     63     110    144    131

$$
Forecaster...JM
Requested by...Jay Wanner
Type of request...PRESCRIBED
.TAG 2411481.0/ARX
.DELDT 04/20/24
.FormatterVersion 2.0.0
.EMAIL jay.wanner@wisconsin.gov