862
FNUS73 KMPX 221115
FWSMPX

Spot Forecast for Helen Allison Rx...The Nature Conservancy
National Weather Service Twin Cities/Chanhassen MN
615 AM CDT Thu May 22 2025

Forecast is based on ignition time of 1200 CDT on May 22.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

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

.DISCUSSION...Clouds will quickly decrease this morning resulting
in mostly sunny skies. Temperatures will rise into the mid 60s
this afternoon with relative humidities falling to around 40
percent. Northerly winds will increase to 5-10 knots with gusts to
15 knots expected. Winds will become more north-northwesterly late
this afternoon.

.REST OF TODAY...

Sky/weather.........Sunny (20-30 percent).
Temperature.........59 at ignition...Max 65.
RH..................49 percent at ignition...Min 40 percent.
Wind (20 ft)........Winds north at 9 mph at ignition...otherwise
                    North winds 7 to 10 mph.
Smoke dispersal.....Excellent /87400 knot-ft/ at ignition.
                    Max...excellent /96600 knot-ft/.
Mixing height.......5800 ft AGL at ignition...otherwise 6900 ft
                    AGL.
Transport winds.....North 15 to 17 mph.

TIME (CDT)      12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P 11P
Sky cover.......MCR MCR MCR MCR MCR PC  MCR MCR MCR MCR MCR MCR
Weather cov.....
Weather type....
Tstm cov........
Temp............59  61  63  63  63  65  64  63  61  56  53  50
RH..............49  46  43  43  43  40  43  46  49  57  64  68
20 FT wind dir..N   N   N   N   N   NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..9   10  9   9   8   7   7   5   3   2   2   2
20 FT wind gust.17  18  17  17  17  16  14  12  10  9   8   8
Mix hgt (kft)...5.8 6.5 6.8 6.9 6.9 6.3 4.7 2.3 0.5 0.4 0.4 0.4
Transp wind dir.N   N   N   N   N   N   N   NW  NW  NW  NW  N
Transp wind spd.17  16  16  15  16  15  13  12  9   8   8   9

.TONIGHT...

Sky/weather.........Mostly clear (10-20 percent).
Temperature.........Min 39.
RH..................Max 89 percent.
Wind (20 ft)........Northwest winds 5 to 7 mph early in the evening
                    becoming light.
Smoke dispersal.....Good (52100 knot-ft) early in the evening
                    decreasing to poor (2600 knot-ft) late in the
                    night.
Mixing height.......400 ft AGL.
Transport winds.....Northwest 8 to 13 mph shifting to the northeast
                    9 to 12 mph overnight.

.FRIDAY...

Sky/weather.........Sunny (20-30 percent) then becoming partly
                    sunny (45-55 percent).
Temperature.........Max 65.
RH..................Min 41 percent.
Wind (20 ft)........Light winds becoming north 5 to 6 mph late in
                    the morning.
Smoke dispersal.....Poor (2900 knot-ft) early in the morning
                    increasing to good (40700 knot-ft) in the
                    afternoon.
Mixing height.......5300 ft AGL.
Transport winds.....Northeast 8 to 12 mph.

$$
Forecaster...Grunzke
Requested by...Eric Chien
Type of request...PRESCRIBED
.TAG 2514495.0/MPX
.DELDT 05/22/25
.FormatterVersion 2.0.0
.EMAIL eric.chien@tnc.org