269
FNUS73 KMPX 121112
FWSMPX

Spot Forecast for Litchfield WPA "B" Rx...USFWS
National Weather Service Twin Cities/Chanhassen MN
612 AM CDT Sun May 12 2024

Forecast is based on ignition time of 0800 CDT on May 12.
IF CONDITIONS BECOME UNREPRESENTATIVE...CONTACT THE NATIONAL WEATHER
SERVICE.

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

.DISCUSSION...A warm and breezy day lies ahead with RH dropping
into the mid 20s. Winds will gradually shift from southwest to
northwest through midday.

.REST OF TODAY...

Sky/weather.........Sunny (15-25 percent). Areas of smoke late in
                    the afternoon.
Temperature.........63 at ignition...Max 83.
RH..................58 percent at ignition...Min 25 percent.
Wind (20 ft)........Winds southwest at 9 mph at
                    ignition...otherwise West winds 9 to 13 mph
                    shifting to the northwest around 13 mph in the
                    afternoon.
Smoke dispersal.....Poor /7800 knot-ft/ at ignition.
                    Max...excellent /92800 knot-ft/ increasing to
                    excellent (113800 knot-ft) in the afternoon.
Mixing height.......600 ft AGL at ignition...otherwise 8300 ft AGL.
Transport winds.....West 16 to 22 mph shifting to the northwest 18
                    to 20 mph late in the afternoon.
Haines Index........6 or high potential for large plume dominated
                    fire growth at ignition...max 6.

TIME (CDT)      8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM
Sky cover.......MCR MCR MCR MCR MCR MCR MCR MCR MCR PC  PC  PC
Weather cov.....                                    ARS ARS ARS
Weather type....                                    SMK SMK SMK
Tstm cov........
Temp............63  68  74  78  80  81  83  83  83  81  80  77
RH..............58  49  38  32  30  28  26  25  25  25  25  25
20 FT wind dir..SW  W   W   W   W   NW  NW  NW  NW  NW  NW  NW
20 FT wind spd..9   10  12  13  13  13  13  13  13  13  13  13
20 FT wind gust.20  20  21  20  20  20  20  20  20  20  18  18
Mix hgt (kft)...0.6 1.1 1.7 3.0 4.9 6.3 7.9 8.3 8.0 7.8 6.5 4.5
Transp wind dir.W   W   W   W   W   W   NW  NW  NW  NW  NW  N
Transp wind spd.16  18  21  21  22  21  21  21  18  20  18  17
Haines index....6   6   6   6   6   5   5   5   5   5   5   5

.TONIGHT...

Sky/weather.........Partly cloudy (25-35 percent). Areas of smoke.
Temperature.........Min 49.
RH..................Max 68 percent.
Wind (20 ft)........North winds 7 to 13 mph decreasing to around 7
                    mph early in the morning.
Smoke dispersal.....Excellent (104300 knot-ft) early in the evening
                    decreasing to poor (4400 knot-ft) late in the
                    night.
Mixing height.......400 ft AGL.
Transport winds.....North 13 to 18 mph shifting to the northeast
                    around 12 mph early in the morning.
Haines Index........5 or moderate potential for large plume
                    dominated fire growth.

.MONDAY...

Sky/weather.........Sunny (10-20 percent). Areas of smoke in the
                    morning.
Temperature.........Max 69.
RH..................Min 28 percent.
Wind (20 ft)........North winds 6 to 12 mph.
Smoke dispersal.....Poor (4200 knot-ft) early in the morning
                    increasing to excellent (65500 knot-ft) in the
                    afternoon.
Mixing height.......5000 ft AGL.
Transport winds.....North 12 to 16 mph.
Haines Index........4 to 5 or low to moderate potential for large
                    plume dominated fire growth.

$$
Forecaster...Borghoff
Requested by...Blatz
Type of request...PRESCRIBED
.TAG 2413792.0/MPX
.DELDT 05/12/24
.FormatterVersion 2.0.0
.EMAIL david_blatz@fws.gov