Spot Forecast
Issued by NWS Bismarck, ND
Issued by NWS Bismarck, ND
004 FNUS73 KBIS 201129 FWSBIS Spot Forecast for 6-1...TNC National Weather Service Bismarck ND 629 AM CDT Mon May 20 2024 Forecast is based on ignition time of 1100 CDT on May 20. If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION... Look for partly to mostly cloudy skies today with a northwest wind around 10 mph at ignition time, increasing to 10 to 15 mph early to mid afternoon. Gusts up to 20 mph will be possible during this time. Winds will then shift to the north mid to late afternoon and diminish back to around 10 mph. The forecast high today is 65 degrees. Fair smoke dispersal this morning will become good in the afternoon. At max heating this afternoon the mixing height is expected to be near 7000 feet. .REST OF TODAY... Sky/weather.........Partly to mostly cloudy. CWR.................0 percent. Chance of pcpn......0 percent. LAL.................1. Max temperature.....Around 65. Min humidity........43 percent. Wind (20 ft)........Northwest winds 10 mph at ignition time, increasing to 10 to 15 mph early to mid afternoon. Gusts up to 20 mph will be possible during this time. Winds will then shift to the north mid to late afternoon and diminish back to around 10 mph. Mixing height.......6900 ft AGL. Transport winds.....Northwest 13 to 17 mph. Smoke dispersal.....Fair (52700 knot-ft) early in the morning increasing to good (80400 knot-ft) in the afternoon. Haines Index........3 to 5 or very low to moderate potential for large plume dominated fire growth. TIME (CDT) 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........63 60 57 58 59 61 67 Weather cov..... Weather type.... Tstm cov........ CWR.............0 0 0 0 0 0 0 Chc of pcpn (%).0 0 0 0 0 0 0 LAL.............1 1 1 1 1 1 1 Temp............55 57 59 62 63 64 65 RH..............69 64 57 52 48 43 43 20 FT wind dir..NW NW NW NW NW N N 20 FT wind spd..10 12 11 10 9 9 8 20 FT wind gust.15 16 17 16 14 13 12 Mix hgt (kft)...3.8 4.7 5.1 5.5 6.1 6.7 6.9 Transp wind dir.NW NW NW NW N N N Transp wind spd.16 16 17 16 15 14 13 Haines index....3 3 3 4 4 5 5 Dispr kt-ft/1K..53 65 77 77 79 80 76 .TONIGHT... Sky/weather.........Mostly cloudy. CWR.................0 percent. Chance of pcpn......10 percent. LAL.................1. Min temperature.....Around 44. Max humidity........83 percent. Wind (20 ft)........North winds 5 to 6 mph early in the evening becoming light. Mixing height.......300 ft AGL. Transport winds.....North 7 to 12 mph shifting to the east 7 to 9 mph in the late evening and overnight. Smoke dispersal.....Good (69200 knot-ft) early in the evening decreasing to poor (2500 knot-ft) late in the night. Haines Index........4 to 5 or low to moderate potential for large plume dominated fire growth. TIME (CDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........74 80 78 77 75 72 69 67 69 71 73 70 Weather cov..... Weather type.... Tstm cov........ CWR.............0 0 0 0 0 0 0 0 0 0 0 0 Chc of pcpn (%).0 0 0 0 0 0 10 10 10 10 10 10 LAL.............1 1 1 1 1 1 1 1 1 1 1 1 Temp............63 63 61 57 54 52 51 49 48 47 46 45 RH..............44 44 49 55 61 66 68 71 77 76 79 82 20 FT wind dir..N N N NE NE NE NE E E E E E 20 FT wind spd..6 5 5 4 4 4 4 4 4 4 4 4 20 FT wind gust.10 9 8 7 7 7 7 8 7 7 7 8 Mix hgt (kft)...6.9 6.0 2.2 0.7 0.5 0.4 0.4 0.4 0.4 0.4 0.4 0.3 Transp wind dir.N N N N NE NE NE E E E E E Transp wind spd.12 8 8 7 7 9 9 9 9 8 8 9 Haines index....5 5 5 5 5 5 5 5 5 4 4 4 Dispr kt-ft/1K..69 42 15 4 3 3 3 3 3 3 3 3 .TUESDAY... Sky/weather.........Mostly cloudy. Slight chance of rain showers in the afternoon. CWR.................0 percent. Chance of pcpn......20 percent. LAL.................1. Max temperature.....Around 66. Min humidity........43 percent. Wind (20 ft)........Light winds becoming east 5 to 11 mph in the morning and early afternoon, then shifting to the northeast around 11 mph late in the afternoon. Mixing height.......6800 ft AGL. Transport winds.....East 8 to 13 mph shifting to the northeast 13 to 14 mph in the afternoon. Smoke dispersal.....Poor (2700 knot-ft) early in the morning increasing to good (74800 knot-ft) in the afternoon. Haines Index........4 to 5 or low to moderate potential for large plume dominated fire growth. TIME (CDT) 6 AM 9 AM NOON 3 PM Sky (%).........68 68 72 73 Weather cov..... S CHC Weather type....NONE NONE NONE RNSHWR Tstm cov........ CWR.............0 0 0 0 Chc of pcpn (%).10 10 10 20 LAL.............1 1 1 1 Temp............45 53 61 64 RH..............82 71 53 43 20 FT wind......E 4G8 E 6G11 NE 9G14 NE 11G15 Mix hgt (ft)....400 1800 5200 6500 Transport wind..E 10 E 9 NE 14 NE 13 Haines index....5 4 4 4 Dispr kt-ft/1K..3 15 61 75 $$ Forecaster...HAMILTON Requested by...Chris Gordon Type of request...PRESCRIBED .TAG 2414710.0/BIS .DELDT 05/20/24 .FormatterVersion 2.0.0 .EMAIL Chris_gordon@tnc.org