364
FNUS73 KARX 101043
FWSARX

Spot Forecast for Preston North Rx...The Nature Conservancy
National Weather Service La Crosse WI
543 AM CDT Thu Oct 10 2024

Forecast is based on ignition time of 0800 CDT on October 10.
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...
Clear skies should lead to good mixing heights of 2000-3000 feet
today and also contribute to winds of 5 to 10 mph. Winds will tend
to be out of the southeast at ignition time before becoming out
of the south later this morning. Starting this evening, winds will
slowly begin to turn clockwise, becoming out of the southwest by
daybreak Friday. Friday will feature higher wind speeds of 5 to 15
mph wind the clockwise shift continuing with winds out of the
northwest by the afternoon. RH values will drop to 35 to 40
percent both afternoons. Confidence in this forecast panning out
is high with no precipitation - and no source of sudden wind
changes - expected.

.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent).
CWR.................0 percent.
Temperature.........41 at ignition...Max 73.
RH..................100 percent at ignition...Min 39 percent.
Wind (20 ft)........Winds southeast at 3 mph at
                    ignition...otherwise Light winds becoming south
                    5 to 6 mph in the late morning and afternoon.
Mixing height.......400 ft AGL at ignition...otherwise 2000 ft AGL
                    increasing to 3000 ft AGL in the afternoon.
Transport winds.....South 10 to 12 mph.
Smoke dispersal.....Poor /3800 knot-ft/ at ignition. Max...fair
                    /29700 knot-ft/.
Haines Index........4 or low potential for large plume dominated
                    fire growth at ignition...max 5.

TIME (CDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........8   7   5   3   3   2   3   4   5   8
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0
Temp............41  46  54  59  63  68  70  71  73  71
RH..............100 91  72  62  52  42  39  39  39  41
20 FT wind dir..SE  SE  SE  S   S   S   S   S   S   S
20 FT wind spd..3   4   5   5   6   6   6   6   5   5
20 FT wind gust.11  11  12  13  13  14  13  13  13  12
Mix hgt (kft)...0.4 0.6 1.2 1.7 2.0 2.5 2.8 2.9 3.0 2.2
Transp wind dir.SE  S   S   S   S   S   S   S   S   S
Transp wind spd.10  12  12  12  12  10  10  10  12  12
Haines index....4   4   4   4   4   5   5   5   5   5
SDspl kt-ft/10004   6   12  17  20  22  25  26  30  22

.TONIGHT...

Sky/weather.........Partly cloudy (20-30 percent).
CWR.................0 percent.
Temperature.........Min 51.
RH..................Max 75 percent.
Wind (20 ft)........Light winds becoming southwest around 5 mph
                    after 3 am.
Mixing height.......400 ft AGL.
Transport winds.....Southwest 9 to 14 mph.
Smoke dispersal.....Poor (3800 knot-ft).
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

TIME (CDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........14  21  22  23  29  25  31  33  36  33  30  37
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............68  63  58  56  56  55  54  54  53  53  52  52
RH..............46  57  69  74  72  74  74  71  74  72  75  75
20 FT wind dir..S   S   S   S   S   S   S   SW  SW  SW  SW  SW
20 FT wind spd..4   3   3   3   3   3   3   3   4   4   5   5
20 FT wind gust.11  9   9   9   11  11  11  13  14  14  14  13
Mix hgt (kft)...0.5 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4 0.4
Transp wind dir.S   S   S   S   S   SW  SW  SW  SW  SW  SW  SW
Transp wind spd.9   10  10  13  13  14  14  14  14  14  14  14
Haines index....5   5   5   5   5   5   5   5   5   5   5   5
SDspl kt-ft/10004   4   4   5   5   5   5   5   5   5   5   5

.FRIDAY...

Sky/weather.........Partly sunny (50-60 percent).
CWR.................0 percent.
Temperature.........Max 78.
RH..................Min 40 percent.
Wind (20 ft)........Southwest winds 5 to 9 mph with gusts to around
                    18 mph shifting to the northwest 8 to 9 mph
                    with gusts to around 18 mph late in the
                    afternoon.
Mixing height.......2200 ft AGL increasing to 3400 ft AGL in the
                    afternoon.
Transport winds.....Southwest 15 to 24 mph shifting to the
                    northwest 16 to 22 mph late in the afternoon.
Smoke dispersal.....Poor (5800 knot-ft) early in the morning
                    increasing to excellent (61700 knot-ft) in the
                    afternoon.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

TIME (CDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........43  52  55  59  62  59  58  53  53  57  60  59
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   0   0   0   0   0   0   0   0   0   0
Temp............51  52  55  60  68  71  73  76  77  77  77  74
RH..............76  75  69  62  51  47  44  40  41  40  40  44
20 FT wind dir..SW  SW  SW  SW  SW  SW  W   W   W   W   NW  NW
20 FT wind spd..5   5   6   7   8   9   9   9   9   9   8   8
20 FT wind gust.13  14  14  16  18  18  16  18  18  18  16  16
Mix hgt (kft)...0.4 0.4 0.5 0.8 1.1 1.5 2.2 2.9 3.1 3.3 3.4 2.5
Transp wind dir.SW  SW  SW  SW  SW  W   W   W   W   NW  NW  NW
Transp wind spd.15  15  16  18  18  20  22  24  22  21  18  16
Haines index....5   5   5   5   5   5   5   5   5   5   5   5
SDspl kt-ft/10006   6   7   13  17  26  42  62  59  59  55  34

$$
Forecaster...AF
Requested by...Caleb Klima
Type of request...PRESCRIBED
.TAG 2423968.0/ARX
.DELDT 10/10/24
.FormatterVersion 2.0.0
.EMAIL caleb.klima@tnc.org