Text Products for FWS Issued by DTX

Spot Forecast
Issued by NWS Detroit/Pontiac, MI
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000
FNUS73 KDTX 200818
FWSDTX

Spot Forecast for Shiawassee Triangle Rx Burn...MIDNR
National Weather Service Detroit/Pontiac MI
418 AM EDT Sat Apr 20 2024

Forecast is based on ignition time of 1700 EDT on April 20.
If conditions become unrepresentative...contact the National Weather
Service.

.DISCUSSION...Dry conditions will persist throughout the weekend and
into Monday. Cool and mostly cloudy conditions today will keep min RH
values around 40 percent. Surface wind directions are expected
to remain out of the west throughout the day and early evening.
Wind directions may become west southwest during the mid to late
evening hours as surface wind speeds drop to less than 7 mph.
With a little more sunshine, temps will be warmer on Sunday and
Monday and allow min RH values to drop to 30 percent. A
persistent breezy west wind will weaken slightly and shift
to southwest by Monday.

.REST OF TODAY...

Sky/weather.........Mostly cloudy (70-80 percent).
Max temperature.....Around 48.
Min humidity........39 percent.
Eye level winds.....West winds around 13 mph.
Mixing height.......6600 ft AGL.
Transport winds.....West around 22 mph.
Haines Index........4 or low potential for large plume dominated
                    fire growth.
Smoke Dispersal....Excellent (MAX...1084).

TIME (EDT)      5PM
SKY (%).........74
WEATHER COV.....
WEATHER TYPE....
TEMP............47
RH..............39
EYE LVL WND DIR.W
EYE LVL WND SPD.13
EYE LVL WND GST.18
MIX HGT (KFT)...6.6
HAINES INDEX....4
SMOKE DISPER....1247

.TONIGHT...

Sky/weather.........Mostly cloudy (60-70 percent)becoming partly
                    cloudy (35-45 percent). Widespread frost early
                    in the morning.
Min temperature.....Around 32.
Max humidity........80 percent.
Eye level winds.....West winds 6 to 12 mph.
Mixing height.......400 ft AGL.
Transport winds.....West 12 to 20 mph...decreasing to 10 to 12 mph
                    after 3 am.
Haines Index........4 or low potential for large plume dominated
                    fire growth.
Smoke Dispersal....Poor (MIN...99)...decreasing to poor (MIN...31)
                   overnight.

TIME (EDT)      6 PM   8 PM   10 PM  MIDNGT 2 AM   4 AM
SKY (%).........70     56     49     37     43     33
WEATHER COV.....
WEATHER TYPE....NONE   NONE   NONE   NONE   NONE   NONE
TEMP............46     45     40     38     35     33
RH..............40     43     52     59     67     77
EYE LVL WND DIR.W      W      W      W      W      SW
EYE LVL WND SPD.12     10     7      6      6      6
EYE LVL WND GST.18     16     13     12     12     10
MIX HGT (KFT)...6200   2800   1600   1000   400    400
HAINES INDEX....4      4      4      4      4      4
SMOKE DISPER....1054   386    189    114    40     43

.SUNDAY...

Sky/weather.........Sunny (10-20 percent). Widespread frost early
                    in the morning, then areas of frost early in
                    the morning.
Max temperature.....Around 57.
Min humidity........31 percent.
Eye level winds.....West winds 6 to 13 mph...increasing to around
                    14 mph late in the afternoon.
Mixing height.......7500 ft AGL.
Transport winds.....West 10 to 16 mph...increasing to 20 to 28 mph
                    in the late morning and afternoon.
Haines Index........4 to 5 OR low to moderate potential for large
                    plume dominated fire growth.
Smoke Dispersal....Good (MAX...508)...increasing to excellent
                   (MAX...1529) late in the morning.

TIME (EDT)      6 AM      9 AM      NOON      3 PM
SKY (%).........17        0         3         14
WEATHER COV.....WIDSPD
WEATHER TYPE....FROST     NONE      NONE      NONE
TEMP............33        40        50        55
RH..............80        63        40        33
EYE LEVEL WIND..SW 6      W 8       W 12      W 14
EYE LEVEL WIND..10        13        18        20
MIX HGT (FT)....400       1300      5700      7100
HAINES INDEX....4         4         4         5
SMOKE DISPER....39        181       1143      1646

$$
Forecaster...Behnke
Requested by...Nate Stearns
Type of request...PRESCRIBED
.TAG 2411420.0/DTX
.DELDT 04/20/24
.FormatterVersion 2.0.0
.EMAIL stearnsn@michigan.gov
National Weather Service Weather Forecast Office
