Text Products for FWS Issued by ARX

Spot Forecast
Issued by NWS La Crosse, WI
Versions: 1 2 3 4 5 6 7 8 9 10
000
FNUS73 KARX 191942
FWSARX

Spot Forecast for Pershing H,X, Unit...WI DNR
National Weather Service La Crosse WI
242 PM CDT Fri Apr 19 2024

Forecast is based on ignition time of 1500 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...West to northwest winds will remain brisk into
tonight with temperatures dropping well below freezing. There is a
small chance (20-30%) for light rain turning to snow through this
evening, but it would only amount to perhaps a light dusting on
grassy surfaces. Brisk northwest winds will continue on Saturday
with excellent smoke dispersal. Clouds will diminish into the
afternoon hours with minimum RH around 35 percent, perhaps closer
to 30 percent if mixing overachieves. Please submit a request for
an updated spot forecast Saturday morning to ensure the latest
forecast information.

.SATURDAY...

Sky/weather.........Mostly sunny (25-35 percent).
CWR.................0 percent.
Temperature.........45 at ignition...Max 47.
RH..................41 percent at ignition...Min 35 percent.
Wind (20 ft)........Winds northwest at 12 mph at
                    ignition...otherwise Northwest winds 11 to 12
                    mph.
Mixing height.......5400 ft AGL at ignition...otherwise 5400 ft
                    AGL.
Transport winds.....Northwest around 22 mph.
Smoke dispersal.....Excellent /102500 knot-ft/ at ignition.
                    Max...excellent /102500 knot-ft/.
Haines Index........3 or very low potential for large plume
                    dominated fire growth at ignition...max 3.

TIME (CDT)      3PM 4PM 5PM
Sky (%).........39  26  18
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0
Temp............45  46  47
RH..............41  40  35
20 FT wind dir..NW  NW  NW
20 FT wind spd..12  12  11
20 FT wind gust.18  19  16
Mix hgt (kft)...5.4 5.3 5.3
Transp wind dir.NW  NW  NW
Transp wind spd.22  22  22
Haines index....3   3   3
SDspl kt-ft/1000103 101 100

.SATURDAY NIGHT...

Sky/weather.........Mostly clear (0-10 percent). Widespread frost
                    after 3 am.
CWR.................0 percent.
Temperature.........Min 28.
RH..................Max 71 percent.
Wind (20 ft)........West winds 7 to 10 mph.
Mixing height.......4900 ft AGL decreasing to 400 ft AGL.
Transport winds.....West 13 to 21 mph.
Smoke dispersal.....Excellent (88300 knot-ft) early in the evening
                    decreasing to poor (4700 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 (%).........9      4      10     5      2      1
Weather cov.....                                   WIDSPD
Weather type....NONE   NONE   NONE   NONE   NONE   FROST
Tstm cov........
CWR.............0      0      0      0      0      0
Temp............45     41     35     33     30     28
RH..............38     44     56     58     66     71
20 ft wind......W 10   W 9    W 7    W 7    W 7    W 7
20 ft wind gust.16     14     13     13     13     13
Mix hgt (ft)....4900   900    400    400    400    400
Transport wind..NW 21  W 14   W 13   W 13   W 13   W 13
Haines index....3      4      4      4      4      4
SDspl kt-ft/100088     11     5      5      5      5

.SUNDAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Temperature.........Max 57.
RH..................Min 32 percent.
Wind (20 ft)........West winds 8 to 13 mph.
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 12 to 21 mph shifting to the northwest 18
                    to 23 mph in the afternoon.
Smoke dispersal.....Poor (4600 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 (%).........2      3      2      4      5      5
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Temp............29     35     46     52     55     56
RH..............72     64     49     39     35     32
20 ft wind......W 8    W 9    W 11   W 12   W 13   W 13
20 ft wind gust.13     14     16     19     21     21
Mix hgt (ft)....500    1600   3700   5800   7200   6900
Transport wind..W 12   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...MK
Requested by...Jay Wanner
Type of request...PRESCRIBED
.TAG 2411417.0/ARX
.DELDT 04/19/24
.FormatterVersion 2.0.0
.EMAIL jay.wanner@wisconsin.gov
National Weather Service Weather Forecast Office
