978
FNUS73 KMPX 191220
FWSMPX

Spot Forecast for Whispering Ridge Rx...MN DNR
National Weather Service Twin Cities/Chanhassen MN
720 AM CDT Thu Sep 19 2024

Forecast is based on ignition time of 1000 CDT on September 19.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

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

.DISCUSSION...
Any precipitation today will be occurring east of the burn site, with dry
weather expected as temperatures again head toward the mid-80s. A cold front
will be working through western MN this morning. Current forecast for wind
direction looks good, with southwest winds expected to be in place by 10am
that will slowly turn toward the west through the afternoon. Given that you
will be post frontal today, there is potential for RHs to come in lower than
forecast, with values closer to 30% possible.

.REST OF TODAY...

Sky/weather.........Mostly sunny (20-30 percent).
Temperature.........75 at ignition...Max 84.
RH..................76 percent at ignition...Min 41 percent.
Wind (20 ft)........Winds southwest at 12 mph at
                    ignition...otherwise Southwest winds 12 to 13
                    mph.
Smoke dispersal.....Good /36600 knot-ft/ at ignition.
                    Max...excellent /79000 knot-ft/.
Mixing height.......2200 ft AGL at ignition...otherwise 4600 ft
                    AGL.
Transport winds.....Southwest 16 to 20 mph.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth at ignition...max 5.

TIME (CDT)      10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM
Sky cover.......PC  PC  PC  PC  MCR MCR MCR MCR CLR CLR CLR CLR
Weather cov.....
Weather type....
Tstm cov........
Temp............75  77  79  81  82  82  83  82  80  78  72  69
RH..............76  71  64  54  50  45  41  45  47  51  59  63
20 FT wind dir..SW  SW  SW  SW  SW  SW  SW  W   W   W   W   W
20 FT wind spd..12  12  12  12  12  13  13  12  10  9   8   7
20 FT wind gust.18  18  18  17  18  21  21  20  20  15  14  13
Mix hgt (kft)...2.2 2.7 3.1 3.7 4.4 4.6 4.1 3.7 1.9 0.7 0.5 0.5
Transp wind dir.SW  SW  SW  SW  SW  SW  SW  W   W   W   W   W
Transp wind spd.20  17  17  16  18  20  20  20  15  14  13  13
Haines index....5   5   5   4   4   4   4   4   4   4   4   4

.TONIGHT...

Sky/weather.........Clear (0-5 percent).
Temperature.........Min 56.
RH..................Max 82 percent.
Wind (20 ft)........West winds 6 to 10 mph.
Smoke dispersal.....Fair (25200 knot-ft) early in the evening
                    decreasing to poor (4200 knot-ft) late in the
                    night.
Mixing height.......500 ft AGL.
Transport winds.....West 10 to 15 mph.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

.FRIDAY...

Sky/weather.........Sunny (0-10 percent).
Temperature.........Max 83.
RH..................Min 33 percent.
Wind (20 ft)........West winds 6 to 8 mph.
Smoke dispersal.....Poor (3900 knot-ft) early in the morning
                    increasing to good (54300 knot-ft) in the
                    afternoon.
Mixing height.......5400 ft AGL.
Transport winds.....West 8 to 12 mph shifting to the southwest
                    around 10 mph late in the afternoon.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

$$
Forecaster...Griesinger
Requested by...Louise Spiczka
Type of request...PRESCRIBED
.TAG 2422708.0/MPX
.DELDT 09/19/24
.FormatterVersion 2.0.0
.EMAIL louise.spiczka@state.mn.us