038
FNUS73 KMPX 051238
FWSMPX

Spot Forecast for Ottawa Rx...The Nature Conservancy
National Weather Service Twin Cities/Chanhassen MN
738 AM CDT Sun May 5 2024

Forecast is based on ignition time of 1100 CDT on May 05.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

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

.DISCUSSION...
For Ottawa RX, Light & calm winds at ignition become southerly by mid
morning at 5 to 8 mph. Gusts are not forecast to be an issue today.
RH values will drop below 40% this afternoon as temperatures warm up
quickly with mostly clear skies forecast throughout the day. Transport
winds will be between 7 to 12mph.

.REST OF TODAY...

Sky/weather.........Sunny (0-10 percent).
Temperature.........61 at ignition...Max 70.
RH..................49 percent at ignition...Min 32 percent.
Wind (20 ft)........Winds southwest at 3 mph at
                    ignition...otherwise Light winds becoming south
                    5 to 8 mph in the afternoon.
Smoke dispersal.....Fair /29700 knot-ft/ at ignition. Max...good
                    /58000 knot-ft/.
Mixing height.......4900 ft AGL at ignition...otherwise 6200 ft
                    AGL.
Transport winds.....Southwest 7 to 12 mph.
Haines Index........4 or low potential for large plume dominated
                    fire growth at ignition...max 4.

TIME (CDT)      11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P
Sky cover.......CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR CLR
Weather cov.....
Weather type....
Tstm cov........
Temp............61  63  65  67  68  69  70  68  67  64  58  56
RH..............49  44  40  36  34  35  32  36  37  43  55  62
20 FT wind dir..SW  SW  S   S   S   S   S   S   SE  SE  SE  SE
20 FT wind spd..3   5   6   6   7   8   8   8   7   6   6   7
20 FT wind gust.6   7   9   9   10  13  13  13  10  9   9   10
Mix hgt (kft)...4.9 5.7 6.0 6.1 6.2 6.1 5.8 5.6 1.9 0.5 0.4 0.4
Transp wind dir.SW  SW  SW  S   S   S   S   S   S   S   SE  SE
Transp wind spd.7   8   8   8   9   9   12  12  10  8   8   10
Haines index....4   4   4   4   4   4   4   4   4   4   4   4

.TONIGHT...

Sky/weather.........Clear (0-10 percent).
Temperature.........Min 46.
RH..................Max 83 percent.
Wind (20 ft)........Southeast winds 6 to 8 mph.
Smoke dispersal.....Good (55900 knot-ft) early in the evening
                    decreasing to poor (3000 knot-ft) late in the
                    night.
Mixing height.......400 ft AGL.
Transport winds.....South 8 to 15 mph.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

.MONDAY...

Sky/weather.........Mostly sunny (30-40 percent).
Temperature.........Max 75.
RH..................Min 38 percent.
Wind (20 ft)........Southeast winds 9 to 18 mph with gusts to
                    around 29 mph increasing to 20 to 22 mph with
                    gusts to around 35 mph late in the afternoon.
Smoke dispersal.....Poor (6300 knot-ft) early in the morning
                    increasing to excellent (105300 knot-ft) in the
                    afternoon.
Mixing height.......4200 ft AGL.
Transport winds.....Southeast 16 to 25 mph increasing to 26 to 29
                    mph in the afternoon.
Haines Index........4 or low potential for large plume dominated
                    fire growth.

$$
Forecaster...Hewett
Requested by...Matt Graeve
Type of request...PRESCRIBED
.TAG 2413179.0/MPX
.DELDT 05/05/24
.FormatterVersion 2.0.0
.EMAIL mgraeve@tnc.org