460
FNUS73 KGRR 131513
FWSGRR

Spot Forecast for KNC Prop field...DMVA
National Weather Service Grand Rapids MI
Issued by National Weather Service Detroit/Pontiac MI
1113 AM EDT Tue May 13 2025

Forecast is based on ignition time of 1200 EDT on May 13.
If conditions become unrepresentative, contact the National Weather
Service.

Please contact our office at (616) 949-5150, if you have questions
or concerns with this forecast.

.DISCUSSION...
Low pressure will bring scattered showers and a few afternoon
thunderstorms today through Thursday. A line of strong storms
is possible Thursday evening.

.REST OF TODAY...

Sky/weather.........Mostly cloudy (70-80 percent). Chance of
                    showers through the day. Chance of
                    thunderstorms in the afternoon.
Temperature.........70 at ignition...Max 75.
RH..................67 percent at ignition...Min 64 percent.
Wind (20 ft)........Winds east at 6 mph at ignition...otherwise
                    East winds 6 to 7 mph. Gusty and erratic winds
                    expected near thunderstorms in the afternoon.
Mixing height.......2700 ft AGL at ignition...otherwise 3100 ft
                    AGL.
Mixing winds........East 10 to 13 mph.
Smoke dispersal.....310 /good/ at ignition. Max...360 /good/.

TIME (EDT)      12P 1PM 2PM 3PM 4PM 5PM 6PM 7PM 8PM 9PM 10P 11P
Sky (%).........79  76  79  82  78  71  76  75  77  80  82  76
Weather cov.....SCH CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC CHC
Weather type....RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW  RW
Tstm cov........        CHC CHC CHC SCH SCH SCH CHC CHC CHC SCH
Temp............70  72  73  73  74  72  71  71  68  66  65  63
RH..............67  64  64  64  64  69  71  71  79  82  85  88
20 FT wind dir..E   E   E   E   E   E   E   E   E   E   E   E
20 FT wind spd..6   7   7   7   7   6   6   6   5   3   3   3
20 FT wind gust.14  15  15  15  15  14  13  12  10  8   7   7
Mix hgt (kft)...2.7 2.9 3.1 3.0 2.8 2.9 2.1 1.8 0.9 0.7 0.7 0.7
Mixing wind dir.E   E   E   E   E   E   E   E   E   E   E   E
Mixing wind spd.12  12  12  12  12  13  12  10  10  10  10  10
Smoke disprsl...310 330 350 350 320 360 240 180 100 70  70  70

.TONIGHT...

Sky/weather.........Mostly cloudy (75-85 percent). Chance of
                    showers and thunderstorms in the evening, then
                    slight chance of rain showers overnight.
Temperature.........Min 59.
RH..................Max 92 percent.
Wind (20 ft)........East winds around 5 mph in the evening becoming
                    light. Gusty and erratic winds expected near
                    thunderstorms in the evening. Gusty and erratic
                    winds expected near thunderstorms through about
                    2 am.
Mixing height.......600 ft AGL.
Mixing winds........East 7 to 12 mph.
Smoke dispersal.....40 (poor).

.WEDNESDAY...

Sky/weather.........Mostly cloudy (70-80 percent). Chance of
                    showers until midday. Slight chance of
                    thunderstorms through early afternoon, then
                    showers likely and chance of thunderstorms in
                    the afternoon.
Temperature.........Max 79.
RH..................Min 53 percent.
Wind (20 ft)........Light winds becoming south 5 to 6 mph through
                    mid afternoon, then becoming light late in the
                    day. Gusty and erratic winds expected near
                    thunderstorms.
Mixing height.......2900 ft AGL.
Mixing winds........Southeast 8 to 9 mph.
Smoke dispersal.....100 (poor) early in the morning increasing to
                    270 (fair) in the afternoon.

$$
Forecaster...Mann
Requested by...Michele Richards
Type of request...PRESCRIBED
.TAG 2513876.0/GRR
.DELDT 05/13/25
.FormatterVersion 2.0.0
.EMAIL richardsm2@michigan.gov