FNUS73 KBIS 191119 FWSBIS Spot Forecast for Ghylin RX...USWFS National Weather Service Bismarck ND 619 AM CDT Tue May 19 2026 Forecast is based on ignition time of 0600 CDT on May 19. If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION... An overcast sky will prevail early this morning with some sprinkles or light rain showers possible. Clearing of clouds should begin by late morning, giving way to a partly cloudy afternoon with a high temperature in the lower 50s and humidity falling to around 40 percent. Northwest winds will remain sustained around 10 to 15 mph through the day. Temperatures will fall to near freezing tonight, with humidity recovering to around 80 percent. A period of light and variable winds in the evening will be followed by increasing southerly winds, reaching 15 mph early Wednesday morning and then 25 mph with gusts to around 35 mph Wednesday afternoon. It will be warmer on Wednesday, with a high near 70 degrees and minimum humidity around 35 percent. .TODAY... Sky/weather.........Cloudy in the morning, with decreasing clouds in the afternoon. Slight chance of sprinkles in the morning and early afternoon. CWR.................4 percent. Chance of pcpn......10 percent. Chance of thunder...0 percent. Max temperature.....Around 52. Min humidity........41 percent. Wind (20 ft)........Northwest winds around 10 to 15 mph. Mixing height.......5600 ft AGL. Transport winds.....Northwest around 15 mph. Smoke dispersal.....Poor (8900 knot-ft) early in the morning increasing to good (67600 knot-ft) in the afternoon. TIME (CDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........95 94 91 90 89 85 83 81 73 63 54 45 Weather cov.....SCH SCH SCH SCH SCH SCH SCH SCH SCH Weather type....RW RW RW RW RW RW RW RW RW Tstm cov........ CWR.............0 0 0 0 0 0 0 0 0 0 0 0 Chc of pcpn (%).10 10 10 10 10 10 10 10 10 10 10 0 Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0 Temp............36 36 37 39 40 42 43 45 46 48 49 51 RH..............100 100 96 85 82 73 67 60 58 51 50 46 20 FT wind dir..NW NW NW NW NW NW NW NW NW NW NW NW 20 FT wind spd..10 10 11 11 12 12 13 13 13 12 12 11 20 FT wind gust. 13 14 15 17 18 18 17 17 14 Mix hgt (kft)...0.8 1.2 1.6 2.2 3.3 4.1 4.3 4.4 4.8 4.9 5.4 5.6 Transp wind dir.N N N N NW NW NW NW NW NW NW NW Transp wind spd.13 15 15 16 17 16 16 15 15 15 14 14 Dispr kt-ft/1K..9 15 21 31 50 57 61 58 62 64 65 68 .TONIGHT... Sky/weather.........Mostly clear. CWR.................0 percent. Chance of pcpn......0 percent. Chance of thunder...0 percent. Min temperature.....Around 33. Max humidity........82 percent. Wind (20 ft)........Northwest winds around 5 to 10 mph early in the evening, becoming south-southeast around 7 to 12 mph overnight. Mixing height.......400 ft AGL. Transport winds.....Northwest around 10 mph early in the evening, becoming south-southeast around 10 to 15 mph overnight. Smoke dispersal.....Good (61000 knot-ft) early in the evening decreasing to poor (1800 knot-ft) overnight. TIME (CDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM Sky (%).........37 22 8 11 14 20 Weather cov..... Weather type....NONE NONE NONE NONE NONE NONE Tstm cov........ CWR.............00 0 0 0 0 Chc of pcpn (%).0 0 0 0 0 0 Chc of thdr (%).0 0 0 0 0 0 Temp............51 50 43 38 36 35 RH..............44 46 65 76 79 82 20 ft wind......NW 9 NW 5 SE 3 SE 6 SE 9 S 11 20 ft wind gust.14 8 5 9 12 17 Mix hgt (ft)....5500 2600 400 400 400 400 Transport wind..NW 13 NW 8 SE 6 SE 9 S 12 S 16 Dispr kt-ft/1K..61 18 2 3 4 6 .WEDNESDAY... Sky/weather.........Partly cloudy. CWR.................3 percent. Chance of pcpn......10 percent. Chance of thunder...7 percent. Max temperature.....Around 68. Min humidity........36 percent. Wind (20 ft)........South winds around 15 to 20 mph in the morning, increasing to around 25 mph with gusts to 35 mph in the afternoon. Mixing height.......8100 ft AGL. Transport winds.....South around 20 mph in the morning, increasing to 25 to 30 mph in the afternoon. Smoke dispersal.....Poor (6200 knot-ft) early in the morning increasing to excellent (187200 knot-ft) in the afternoon. TIME (CDT) 6 AM 10 AM 2 PM Sky (%).........34 32 29 Weather cov..... Weather type....NONE NONE NONE Tstm cov........ CWR.............0 0 0 Chc of pcpn (%).0 0 0 Chc of thdr (%).0 0 0 Temp............35 52 64 RH..............82 56 40 20 FT wind......S 13G19 S 19G26 S 23G32 Mix hgt (ft)....400 1900 5500 Transport wind..S 16 S 23 S 28 Dispr kt-ft/1K..6 39 131 $$ Forecaster...HOLLAN Requested by...D. Mireles Type of request...PRESCRIBED .TAG 2614012.0/BIS .DELDT 05/19/26 .FormatterVersion 2.0.0 .EMAIL dustin_mireles@fws.gov