Spot Forecast
Issued by NWS Detroit/Pontiac, MI
Issued by NWS Detroit/Pontiac, MI
853 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