National Weather Service Weather Forecast Office

• Home
• Site Map
• News
• Organization
• Search for: NWS All NOAA 

000
FNUS73 KDLH 211438
FWSDLH

Spot Forecast for Olson Prairie...NPS
National Weather Service Duluth MN
938 AM CDT Sun Apr 21 2024

Forecast is based on ignition time of 1000 CDT on April 21.
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...

Dry weather is expected for today with daytime atmospheric mixing
as high as 7800 ft this afternoon. This deeper mixing will lead
to gusty northwest winds approaching 20 mph. There is some
potential for temperatures to get into the low 60s, which could
drive our minimum RH a little lower, but should not get below 20
percent.

A clipper system will bring light rain starting on Monday
afternoon and persisting into Tuesday. Prior to this rain moving
in, RH values could dip as low as 30 percent where the rain is not
due in until the afternoon. There will also be strong gusty
south-southwesterly wind gusts.

.REST OF TODAY...

Sky/weather.........Sunny (10-20 percent).
Chance of pcpn......0 percent.
LAL.................1.
Max temperature.....Around 59.
Min humidity........25 percent.
Wind (20 ft)........Northwest winds 9 to 12 mph.
Mixing height.......2600 ft AGL increasing to 7800 ft AGL late in
                    the morning.
Transport winds.....Northwest 17 to 23 mph.
Smoke dispersal.....Good (39600 knot-ft) increasing to excellent
                    (119800-147400 knot-ft) late in the morning.
Haines Index........4 or low potential for large plume dominated
                    fire growth.
Pcpn amount.........0.00 inches.

TIME (CDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky cover.......MCR MCR MCR MCR MCR MCR MCR MCR
Weather cov.....
Weather type....
Tstm cov........
Chc of pcpn (%).0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1
Temp............44  48  52  54  56  58  58  58
RH..............46  41  36  32  29  27  27  26
20 FT wind dir..W   NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..8   9   10  11  11  11  10  9
20 FT wind gust.13  14  16  18  19  18  18  16
Mix hgt (kft)...2.6 6.0 6.8 7.4 7.5 7.7 7.8 7.6
Transp wind dir.NW  NW  NW  NW  NW  NW  NW  W
Transp wind spd.17  23  23  23  21  20  20  18
Haines index....4   4   4   4   4   4   4   4
SDspl kt-ft/100040  120 136 147 135 130 132 121

.TONIGHT...

Sky/weather.........Mostly clear (15-25 percent).
Chance of pcpn......0 percent.
LAL.................1.
Min temperature.....Around 32.
Max humidity........72 percent.
Wind (20 ft)........West winds 6 to 8 mph shifting to the southwest
                    around 5 mph in the late evening and overnight,
                    then becoming light after 3 am.
Mixing height.......7100 ft AGL decreasing to 400 ft AGL.
Transport winds.....West 8 to 16 mph shifting to the southwest 9 to
                    10 mph overnight.
Smoke dispersal.....Excellent (99700 knot-ft) decreasing to poor
                    (2900 knot-ft).
Haines Index........4 to 5 or 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.......MCLEAR CLEAR  CLEAR  MCLEAR MCLEAR PCLDY
Weather cov.....
Weather type....NONE   NONE   NONE   NONE   NONE   NONE
Tstm cov........
Chc of pcpn (%).0      0      0      0      0      0
LAL.............1      1      1      1      1      1
Temp............59     52     43     39     36     33
RH..............25     35     51     59     64     69
20 ft wind......W 8    W 6    SW 4   SW 4   SW 4   S 3
20 ft wind gust.14     11     7      7      8      8
Mix hgt (ft)....7100   600    400    400    400    400
Transport wind..W 16   W 8    W 9    SW 9   SW 9   SW 10
Haines index....4      5      5      5      5      5
SDspl kt-ft/1000100    4      3      3      3      3

.MONDAY...

Sky/weather.........Partly sunny (60-70 percent). Chance of rain
                    showers in the afternoon.
Chance of pcpn......40 percent.
LAL.................1.
Max temperature.....Around 66.
Min humidity........30 percent.
Wind (20 ft)........South winds 5 to 14 mph shifting to the
                    southwest 15 to 16 mph with gusts to around 25
                    mph in the afternoon.
Mixing height.......1900 ft AGL increasing to 5900 ft AGL.
Transport winds.....Southwest 10 to 18 mph increasing to 25 to 31
                    mph.
Smoke dispersal.....Poor to fair (3300-21800 knot-ft) increasing to
                    good (34700 knot-ft) late in the morning, then
                    increasing to excellent (131500-158800 knot-ft)
                    for the afternoon.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.
Pcpn amount.........0.03 inches.

TIME (CDT)      6 AM   8 AM   10 AM  NOON   2 PM   4 PM
Sky cover.......PCLDY  PCLDY  MCLDY  MCLDY  MCLDY  MCLDY
Weather cov.....                            CHANCE CHANCE
Weather type....NONE   NONE   NONE   NONE   RNSHWR RNSHWR
Tstm cov........
Chc of pcpn (%).0      0      0      0      40     40
LAL.............1      1      1      1      1      1
Temp............32     38     54     60     65     65
RH..............72     64     40     33     30     33
20 ft wind......S 4    S 7    S 12   S 15   S 16   SW 16
20 ft wind gust.8      13     19     23     25     23
Mix hgt (ft)....400    700    1900   4000   5900   5300
Transport wind..S 10   S 14   SW 21  SW 28  SW 31  SW 29
Haines index....5      4      4      4      4      4
SDspl kt-ft/10003      9      35     96     159    132

$$
Forecaster...Linda
Requested by...Nathaniel orsburn
Type of request...PRESCRIBED
.TAG 2411597.0/DLH
.DELDT 04/21/24
.FormatterVersion 2.0.0
.EMAIL Nathaniel_orsburn@nps.gov