FNUS73 KDMX 201056 FWSDMX Spot Forecast for Pohl Prairie Rx...INHF National Weather Service Des Moines IA 556 AM CDT Sat Apr 20 2024 Forecast is based on ignition time of 0700 CDT on April 20. If conditions become unrepresentative...contact the National Weather Service. An initial observation at ignition and a mid burn observation are required. Please relay them to the National Weather Service for each prescribed burn. .DISCUSSION... Becoming mostly cloudy today with a brisk northwest wind. Temperatures remain cool for this time a year with minimum relative humidity values dropping from 35 to 40 percent by mid afternoon. .REST OF TODAY... Sky/weather.........Mostly sunny (30-40 percent) then becoming mostly cloudy (70-80 percent). Temperature.........30 at ignition...Max 50. RH..................72 percent at ignition...Min 37 percent. Wind (20 ft)........Winds northwest at 12 mph at ignition...otherwise Northwest winds 12 to 16 mph. Mixing height.......600 ft AGL at ignition...otherwise 6200 ft AGL. Transport winds.....Northwest 16 to 23 mph increasing to 22 to 26 mph in the late morning and afternoon. Smoke dispersal.....Poor /8600 knot-ft/ at ignition. Max...excellent /105300 knot-ft/ increasing to excellent (109800 knot-ft) in the afternoon. GFDI................1. Haines Index........3 or very low potential for large plume dominated fire growth at ignition...max 3. TIME (CDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........2 5 28 50 47 52 57 60 62 68 74 Weather cov..... Weather type.... Tstm cov........ Temp............30 32 35 38 40 42 44 46 48 49 50 RH..............72 72 64 57 52 50 49 45 42 40 37 20 FT wind dir..NW NW NW NW NW NW NW NW NW NW NW 20 FT wind spd..12 13 15 15 16 15 15 14 14 14 14 20 FT wind gust.18 18 20 22 22 22 22 22 22 21 21 Mix hgt (kft)...0.6 2.2 3.9 4.6 4.9 5.3 5.5 5.9 6.0 6.1 6.2 Transp wind dir.NW NW NW NW NW NW NW NW NW NW NW Transp wind spd.16 23 26 26 24 24 23 23 23 23 22 GFDI............0 1 1 1 1 1 1 1 1 1 1 Haines index....3 3 3 3 3 3 3 3 3 3 3 SDspl kt-ft/10009 44 90 105 103 112 110 118 121 122 117 .TONIGHT... Sky/weather.........Mostly cloudy (60-70 percent) then becoming partly cloudy (25-35 percent) then becoming clear (0-10 percent). Areas of frost overnight. Widespread frost overnight. Temperature.........Min 29. RH..................Max 85 percent. Wind (20 ft)........Northwest winds 6 to 13 mph. Mixing height.......400 ft AGL. Transport winds.....Northwest 13 to 22 mph decreasing to 10 to 12 mph in the late evening and overnight. Smoke dispersal.....Excellent (88800 knot-ft) decreasing to poor (3400 knot-ft) early in the evening. GFDI................1. Haines Index........3 to 4 or very low to low potential for large plume dominated fire growth. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM Sky (%).........73 63 42 17 2 5 Weather cov..... AREAS WIDSPD WIDSPD Weather type....NONE NONE NONE FROST FROST FROST Tstm cov........ Temp............49 46 40 36 33 31 RH..............39 45 59 69 78 85 20 ft wind......NW 13 NW 9 NW 7 W 7 W 6 W 6 20 ft wind gust.20 14 10 10 10 9 Mix hgt (ft)....6100 700 500 400 400 400 Transport wind..NW 22 NW 13 W 10 W 12 NW 10 NW 10 GFDI............1 1 0 0 0 0 Haines index....3 3 3 3 4 4 SDspl kt-ft/1000116 7 4 4 4 3 .SUNDAY... Sky/weather.........Sunny (0-5 percent). Widespread frost early in the morning. Temperature.........Max 61. RH..................Min 24 percent. Wind (20 ft)........Northwest winds 6 to 12 mph. Mixing height.......5800 ft AGL. Transport winds.....Northwest 12 to 18 mph. Smoke dispersal.....Poor (3800 knot-ft) early in the morning increasing to excellent (93600 knot-ft) in the afternoon. GFDI................1. Haines Index........4 or low potential for large plume dominated fire growth. TIME (CDT) 6 AM 9 AM NOON 3 PM Sky (%).........1 1 1 0 Weather cov.....WIDSPD Weather type....FROST NONE NONE NONE Tstm cov........ Temp............30 38 53 59 RH..............85 64 35 27 20 FT wind......W 6G8 NW 8G12 NW 10G16 W 12G16 Mix hgt (ft)....400 1700 4800 5600 Transport wind..W 12 NW 15 NW 16 W 18 GFDI............0 0 1 1 Haines index....4 4 4 4 SDspl kt-ft/10004 22 69 91 $$ Forecaster...Cogil Requested by...Derek Miner Type of request...PRESCRIBED .TAG 2411479.0/DMX .DELDT 04/20/24 .FormatterVersion 2.0.0 .EMAIL dminer@inhf.org