717
FNUS73 KDLH 301023
FWSDLH

Spot Forecast for Northwest Sands Block A...USDA
National Weather Service Duluth MN
523 AM CDT Tue Sep 30 2025

Forecast is based on ignition time of 1000 CDT on September 30.
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...

Periods of clouds and sun with generally increasing clouds through
the day. Winds will be east to slightly northeasterly at times
today. Speeds at or below 10 mph. Onshore flow from Lake Superior
will keep temperatures lower than inland with a high around 71. RH
will also be high, not falling below 60 percent and likely
hovering closer to 70 percent. A low level inversion is expected
to be in place all day, keeping smoke dispersal conditions poor.

Winds become more light and variable tonight, then southeasterly
on Wednesday. Warmer temperatures and lower min RH are expected.

.REST OF TODAY...

Sky/weather.........Partly sunny (60-70 percent).
Chance of pcpn......0 percent.
Max temperature.....Around 72.
Min humidity........68 percent.
Wind (20 ft)........East winds 6 to 7 mph.
Mixing height.......1500 ft AGL.
Transport winds.....East 8 to 10 mph.
Smoke dispersal.....Poor (7000-12200 knot-ft).
Pcpn amount.........0.00 inches.

TIME (CDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MC  MC  MC  MC  MC  MC  MC  MC
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0
Temp............62  67  69  70  71  70  69  67
RH..............84  73  68  68  68  68  68  70
20 FT wind dir..E   E   E   E   E   E   E   E
20 FT wind spd..5   5   6   6   6   7   7   7
20 FT wind gust.8   8   8   8   9   11  12  12
Mix hgt (kft)...1.0 1.1 1.3 1.5 1.5 1.4 1.2 1.1
Transp wind dir.E   E   E   E   E   E   E   E
Transp wind spd.8   8   8   8   9   9   10  9
SDspl kt-ft/10007   8   9   11  12  11  10  9

.TONIGHT...

Sky/weather.........Mostly cloudy (80-90 percent).
Chance of pcpn......0 percent.
Min temperature.....Around 55.
Max humidity........96 percent.
Wind (20 ft)........Northeast winds 5 to 7 mph in the evening
                    becoming light, then becoming southeast around
                    5 mph overnight.
Mixing height.......1000 ft AGL.
Transport winds.....East 5 to 9 mph shifting to the south 6 to 9
                    mph overnight.
Smoke dispersal.....Poor (1600-7800 knot-ft).
Pcpn amount.........0.00 inches.

TIME (CDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
Sky cover.......MCLDY  MCLDY  MCLDY  CLOUDY CLOUDY MCLDY
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Chc of pcpn (%).0      0      0      0      0      0
Temp............63     58     57     57     57     57
RH..............81     93     96     93     90     83
20 ft wind......E 7    NE 5   NE 4   E 4    SE 4   SE 4
20 ft wind gust.12     11     9      6      8      8
Mix hgt (ft)....1000   400    400    400    400    400
Transport wind..E 9    E 7    E 6    SE 6   S 8    S 8
SDspl kt-ft/10008      2      2      2      3      3

.WEDNESDAY...

Sky/weather.........Partly sunny (55-65 percent).
Chance of pcpn......0 percent.
Max temperature.....Around 76.
Min humidity........50 percent.
Wind (20 ft)........Southeast winds 5 to 7 mph.
Mixing height.......2300 ft AGL increasing to 3200 ft AGL late in
                    the afternoon.
Transport winds.....South 9 to 17 mph.
Smoke dispersal.....Poor to fair (3100-18600 knot-ft) increasing to
                    good (35000-48400 knot-ft).
Pcpn amount.........0.00 inches.

TIME (CDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky cover.......MCLDY  MCLDY  MCLDY  MCLDY  MCLDY  PCLDY
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Chc of pcpn (%).0      0      0      0      0      0
Temp............56     57     65     71     74     74
RH..............83     80     68     59     53     51
20 ft wind......SE 4   SE 5   S 6    S 6    S 7    S 7
20 ft wind gust.8      9      13     12     13     14
Mix hgt (ft)....400    600    1100   2000   2800   3200
Transport wind..S 9    S 12   S 15   S 14   S 16   S 17
SDspl kt-ft/10003      6      14     23     39     48

$$
Forecaster...Josh
Requested by...Mike Mattmiller
Type of request...PRESCRIBED
.TAG 2522576.2/DLH
.DELDT 09/30/25
.FormatterVersion 2.0.0
.EMAIL michael.mattmiller@usda.gov