184
FNUS73 KDLH 060939
FWSDLH

Spot Forecast for Isabella Helispot Rx...USFS
National Weather Service Duluth MN
439 AM CDT Mon May 6 2024

Forecast is based on ignition time of 0800 CDT on May 06.
If there are questions or concerns with this forecast, or if
conditions become unrepresentative, contact the National
Weather Service in Duluth at 218-729-0653.

.DISCUSSION...

Light southeasterly 20-foot winds early this morning increase by
late morning and lead to increasing smoke dispersal values. Minimum
relative humidity is expected to drop into the mid-30% range today
by mid-afternoon before the lake breeze moves through the fire site
between 1600-1800 LT today. A wind shift from south-southeast to
east-southeast is expected behind the lake breeze. A wetting
rainfall is not expected at the fire site until early Tuesday
morning that lasts into Tuesday afternoon.

.REST OF TODAY...

Sky/weather.........Sunny (20-30 percent).
Chance of pcpn......0 percent.
LAL.................1.
Max temperature.....Around 63.
Min humidity........35 percent.
Wind (20 ft)........Southeast winds 6 to 9 mph.
Mixing height.......2200 ft AGL increasing to 4600 ft AGL late in
                    the morning.
Transport winds.....Southeast 12 to 17 mph.
Smoke dispersal.....Poor to fair (5700-15800 knot-ft) increasing to
                    good to excellent (45600-64500 knot-ft).
Haines Index........3 or very low potential for large plume
                    dominated fire growth.
Pcpn amount.........0.00 inches.

TIME (CDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MCR MCR MCR MCR MCR MCR MCR MCR PC  PC
Chc of pcpn (%).0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1
Temp............47  53  57  59  61  63  63  63  63  58
RH..............63  54  49  44  43  41  38  37  36  40
20 FT wind dir..SE  SE  SE  SE  SE  SE  SE  SE  SE  ESE
20 FT wind spd..5   6   7   8   8   9   9   9   9   9
20 FT wind gust.7   9   11  12  13  14  14  14  14  14
Mix hgt (kft)...0.6 1.3 2.2 3.4 4.2 4.5 4.6 4.3 3.6 3.0
Transp wind dir.SE  SE  SE  S   S   S   SE  SE  SE  SE
Transp wind spd.12  14  15  15  15  16  16  17  17  17
Haines index....3   3   3   3   3   3   3   3   3   3
SDspl kt-ft/10006   16  29  44  55  64  65  64  54  46

.TONIGHT...

Sky/weather.........Mostly cloudy (50-60 percent).
Chance of pcpn......10 percent.
LAL.................1.
Min temperature.....Around 43.
Max humidity........79 percent.
Wind (20 ft)........Southeast winds 9 to 14 mph.
Mixing height.......2100 ft AGL.
Transport winds.....Southeast 16 to 18 mph.
Smoke dispersal.....Fair to good (18100-32100 knot-ft) decreasing
                    to poor (7400 knot-ft) early in the evening.
Haines Index........3 to 5 or very low to moderate potential for
                    large plume dominated fire growth.
Pcpn amount.........0.00 inches.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky cover.......PCLDY  MCLDY  MCLDY  PCLDY  PCLDY  PCLDY
Chc of pcpn (%).0      0      0      0      0      10
LAL.............1      1      1      1      1      1
Temp............57     51     47     45     44     43
RH..............45     48     60     68     73     79
20 ft wind......E 9    E 10   E 13   E 10   SE 9   SE 10
20 ft wind gust.14     18     20     16     14     16
Mix hgt (ft)....2100   700    600    600    600    600
Transport wind..E 17   E 16   SE 18  SE 17  SE 16  SE 18
Haines index....3      4      4      4      5      5
SDspl kt-ft/100032     10     9      9      8      10

.TUESDAY...

Sky/weather.........Partly sunny (60-70 percent) then becoming
                    cloudy (85-95 percent). Chance of rain showers
                    early in the morning. Rain showers from late
                    morning through the afternoon.
Chance of pcpn......90 percent.
LAL.................1.
Max temperature.....Around 54.
Min humidity........64 percent.
Wind (20 ft)........East winds 13 to 21 mph. Gusts up to 33 mph
                    increasing to 36 mph in the afternoon.
Mixing height.......1700 ft AGL.
Transport winds.....Southeast 20 to 29 mph shifting to the east 26
                    to 32 mph in the late morning and afternoon.
Smoke dispersal.....Poor to good (11600-30400 knot-ft) increasing
                    to fair to good (28800-45400 knot-ft) in the
                    late morning and afternoon.
Haines Index........3 to 5 or very low to moderate potential for
                    large plume dominated fire growth.
Pcpn amount.........0.29 inches.

TIME (CDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky cover.......PCLDY  MCLDY  MCLDY  MCLDY  CLOUDY CLOUDY
Weather cov.....       CHANCE CHANCE DEFNTE DEFNTE DEFNTE
Weather type....NONE   RNSHWR RNSHWR RNSHWR RNSHWR RNSHWR
Tstm cov........
Chc of pcpn (%).10     30     50     80     90     80
LAL.............1      1      1      1      1      1
Temp............43     50     53     54     54     51
RH..............79     71     66     66     69     71
20 ft wind......E 12   E 16   E 18   E 20   E 21   E 19
20 ft wind gust.22     26     29     32     32     27
Mix hgt (ft)....700    1300   1500   1600   1600   1300
Transport wind..SE 20  SE 28  E 32   SE 30  E 31   E 28
Haines index....5      3      3      3      3      3
SDspl kt-ft/100012     30     42     42     42     32

$$
Forecaster...Nathan
Requested by...Justin OBrien
Type of request...PRESCRIBED
.TAG 2413219.0/DLH
.DELDT 05/06/24
.FormatterVersion 2.0.0
.EMAIL justin.obrien@usda.gov