138
FNUS73 KMPX 041253
FWSMPX

Spot Forecast for Benson Lake RX...USFWS
National Weather Service Twin Cities/Chanhassen MN
753 AM CDT Sat May 4 2024

Forecast is based on ignition time of 0800 CDT on May 04.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

Please contact our office if you have questions or concerns with
this forecast.

.DISCUSSION...
For Benson Lake RX, rain will taper off over the next hour or so.
Our RH values will remain elevated through late morning before it
settles in the 45 to 55% range by mid afternoon. Overcast skies
should begin to clear by ignition time with some scattered cloud
cover returning this afternoon. Light westerly winds will turn more
northwesterly by late morning with speeds around 5 to 10 mph.

.REST OF TODAY...

Sky/weather.........Partly sunny (45-55 percent) then becoming
                    sunny (20-30 percent). Slight chance of rain
                    showers early in the morning.
Temperature.........47 at ignition...Max 60.
RH..................83 percent at ignition...Min 45 percent.
Wind (20 ft)........Winds west at 9 mph at ignition...otherwise
                    Northwest winds 8 to 13 mph.
Smoke dispersal.....Poor /6300 knot-ft/ at ignition.
                    Max...excellent /95800 knot-ft/ increasing to
                    excellent (97200 knot-ft) late in the
                    afternoon.
Mixing height.......1300 ft AGL at ignition...otherwise 6300 ft
                    AGL.
Transport winds.....Northwest 6 to 15 mph increasing to 18 to 20
                    mph in the afternoon.
Haines Index........3 or very low potential for large plume
                    dominated fire growth at ignition...max 4.

TIME (CDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM
Sky cover.......MC  MC  MC  MC  MC  PC  PC  PC  PC  MCR MCR MCR
Weather cov.....SCH
Weather type....RW
Tstm cov........
Temp............47  48  49  51  54  56  58  58  59  58  58  58
RH..............83  80  77  71  64  55  51  49  45  49  47  49
20 FT wind dir..W   NW  NW  NW  NW  NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..9   9   8   9   12  13  13  13  13  13  12  9
20 FT wind gust.10  12  10  13  16  18  20  20  18  18  17  14
Mix hgt (kft)...1.3 1.8 2.7 3.2 4.5 5.7 5.6 5.6 6.3 6.1 4.6 3.3
Transp wind dir.W   NW  NW  W   NW  NW  NW  NW  NW  NW  NW  NW
Transp wind spd.6   8   10  13  15  18  20  20  20  18  16  14
Haines index....3   3   3   3   3   4   4   4   4   4   4   3

.TONIGHT...

Sky/weather.........Mostly clear (5-15 percent).
Temperature.........Min 39.
RH..................Max 85 percent.
Wind (20 ft)........Northwest winds 5 to 12 mph shifting to the
                    north around 5 mph overnight, then becoming
                    light overnight.
Smoke dispersal.....Excellent (64100 knot-ft) early in the evening
                    decreasing to poor (1200 knot-ft) late in the
                    night.
Mixing height.......300 ft AGL.
Transport winds.....Northwest 9 to 16 mph shifting to the northeast
                    5 to 10 mph overnight.
Haines Index........3 to 4 or very low to low potential for large
                    plume dominated fire growth.

.SUNDAY...

Sky/weather.........Sunny (0-10 percent).
Temperature.........Max 66.
RH..................Min 38 percent.
Wind (20 ft)........Light winds becoming south 5 to 12 mph in the
                    late morning and afternoon.
Smoke dispersal.....Poor (1200 knot-ft) early in the morning
                    increasing to good (51600 knot-ft) in the
                    afternoon.
Mixing height.......5700 ft AGL.
Transport winds.....East 5 to 6 mph shifting to the south 6 to 12
                    mph late in the morning.
Haines Index........2 to 3 or very low potential for large plume
                    dominated fire growth.

$$
Forecaster...Hewett
Requested by...Kyle Avesing
Type of request...PRESCRIBED
.TAG 2413131.0/MPX
.DELDT 05/04/24
.FormatterVersion 2.0.0
.EMAIL kyle_avesing@fws.gov