686
FNUS73 KARX 251702
FWSARX

Spot Forecast for Silver Creek NW Rx...Wisconsin DNR
National Weather Service La Crosse WI
1202 PM CDT Wed Sep 25 2024

Forecast is based on ignition time of 0600 CDT on September 27.
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 and warm temperatures are expected
both Friday and Saturday. Winds will be northeasterly both days,
generally under 10 mph. Given the light flow, direction may be
variable at times. Speeds likely will not vary significantly
between Friday and Saturday, but winds may be just a bit higher on
Saturday. Afternoon RH is forecast to fall to around 45 percent
both days.

.FRIDAY...

Sky/weather.........Mostly sunny (20-30 percent).
CWR.................0 percent.
Temperature.........51 at ignition...Max 78.
RH..................100 percent at ignition...Min 46 percent.
Wind (20 ft)........Winds northeast at 1 mph at
                    ignition...otherwise Light winds becoming
                    northeast around 5 mph late in the afternoon.
Mixing height.......400 ft AGL at ignition...otherwise 2200 ft AGL
                    increasing to 4600 ft AGL in the afternoon.
Transport winds.....Northeast 3 to 12 mph increasing to 12 to 13
                    mph late in the afternoon.
Smoke dispersal.....Poor /1200 knot-ft/ at ignition. Max...good
                    /50800 knot-ft/.
Haines Index........4 or low potential for large plume dominated
                    fire growth at ignition...max 4.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........19  34  30  25  21  20  19  18  19  20  21  22
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............51  52  55  60  65  69  72  74  76  76  76  74
RH..............100 100 93  85  75  66  57  51  48  46  46  50
20 FT wind dir..NE  E   E   E   E   E   E   NE  NE  NE  NE  NE
20 FT wind spd..1   1   1   2   2   3   3   4   5   5   5   4
20 FT wind gust.5   5   6   6   7   8   9   11  12  12  12  11
Mix hgt (kft)...0.4 0.4 0.7 1.0 1.2 2.2 3.2 4.2 4.3 4.5 4.6 3.2
Transp wind dir.E   E   E   E   E   E   NE  NE  NE  NE  NE  NE
Transp wind spd.3   3   5   6   7   8   9   10  12  12  13  12
Haines index....4   4   4   4   4   4   4   4   4   4   4   4
SDspl kt-ft/10001   1   3   5   7   16  26  38  43  45  51  32

.FRIDAY NIGHT...

Sky/weather.........Partly cloudy (20-30 percent).
CWR.................0 percent.
Temperature.........Min 51.
RH..................Max 99 percent.
Wind (20 ft)........Light winds.
Mixing height.......400 ft AGL.
Transport winds.....East 8 to 10 mph.
Smoke dispersal.....Fair (14700 knot-ft) early in the evening
                    decreasing to poor (3100 knot-ft) late in the
                    night.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky (%).........23     24     23     24     26     29
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Temp............72     66     60     57     55     53
RH..............56     70     84     89     92     96
20 ft wind......NE 4   NE 3   NE 3   NE 2   NE 2   NE 3
20 ft wind gust.11     9      9      8      8      9
Mix hgt (ft)....1800   400    400    400    400    400
Transport wind..E 9    E 8    E 8    E 9    E 10   NE 9
Haines index....4      4      4      4      4      4
SDspl kt-ft/100015     3      3      4      4      4

.SATURDAY...

Sky/weather.........Sunny (15-25 percent).
CWR.................0 percent.
Temperature.........Max 79.
RH..................Min 46 percent.
Wind (20 ft)........Light winds becoming northeast 5 to 6 mph in
                    the late morning and afternoon.
Mixing height.......2200 ft AGL increasing to 4000 ft AGL in the
                    afternoon.
Transport winds.....Northeast 9 to 13 mph.
Smoke dispersal.....Poor (3600 knot-ft) early in the morning
                    increasing to good (43800 knot-ft) in the
                    afternoon.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

TIME (CDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky (%).........26     20     12     11     10     10
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
CWR.............0      0      0      0      0      0
Temp............51     55     65     72     76     76
RH..............99     90     73     58     49     46
20 ft wind......NE 3   NE 4   NE 5   NE 6   NE 6   NE 6
20 ft wind gust.9      11     12     13     14     14
Mix hgt (ft)....400    700    1500   2900   3800   3700
Transport wind..NE 9   NE 9   NE 10  NE 12  NE 13  NE 13
Haines index....4      5      5      5      5      5
SDspl kt-ft/10004      5      14     29     42     41

$$
Forecaster...JM
Requested by...Darren Ladwig
Type of request...PRESCRIBED
.TAG 2423026.0/ARX
.DELDT 09/25/24
.FormatterVersion 2.0.0
.EMAIL Darren.Ladwig@wisconsin.gov