FNUS71 KOKX 182053 FWSOKX Spot Forecast for BNL Northeast Complex A&I...Brookhaven National Lab National Weather Service New York NY 453 PM EDT Mon May 18 2026 Forecast is based on ignition time of 0800 EDT on May 19. If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION... For Tuesday, initial forecast temperatures around 8am near 70 degrees. The temperatures are forecast to reach into the mid 80s for the afternoon for the forecast highs. SW winds initially around 8am near 7 to 10 mph, increasing to near 12 to 15 mph late morning into the afternoon with gusts up to near 20 mph. Dry conditions expected. RH lowers to minimum of near 45 to 50 percent in the afternoon. .TUESDAY... Sky/weather.........Sunny (20-30 percent). CWR.................0 percent. Chance of thunder...0 percent. Temperature.........69 at ignition...Max 87. RH..................81 percent at ignition...Min 45 percent. Wind (20 ft)........Winds southwest at 6 mph at ignition...otherwise Southwest winds 6 to 11 mph. Gusts up to 23 mph late in the afternoon. Mixing height.......300 ft AGL at ignition...otherwise 3400 ft AGL. Transport winds.....Southwest 14 to 23 mph increasing to 25 to 26 mph late in the afternoon. ADI.................12 early in the morning increasing to 69 in the afternoon. TIME (EDT) 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........23 22 22 21 18 14 11 19 26 34 Weather cov..... Weather type.... Tstm cov........ CWR.............0 0 0 0 0 0 0 0 0 10 Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 Temp............69 73 78 82 84 86 87 87 85 83 RH..............81 71 60 53 49 46 45 45 48 51 20 FT wind dir..210 210 210 210 210 210 210 210 210 210 20 FT wind spd..6 6 6 6 7 9 10 11 11 11 20 FT wind gust.10 10 11 12 13 14 16 17 18 18 Mix hgt (kft)...0.3 0.1 0.1 0.3 1.4 2.7 3.4 2.7 1.4 0.3 Transp wind dir.210 210 210 210 220 230 230 230 220 210 Transp wind spd.14 14 15 16 17 18 21 23 25 26 ADI.............14 13 12 16 35 57 69 58 38 20 .TUESDAY NIGHT... Sky/weather.........Partly cloudy (40-50 percent) then becoming mostly cloudy (50-60 percent) then becoming partly cloudy (40-50 percent). CWR.................10 percent. Chance of thunder...0 percent. Temperature.........Min 67. RH..................Max 78 percent. Wind (20 ft)........Southwest winds 6 to 10 mph. Gusts up to 22 mph in the evening. Mixing height.......0 ft AGL. Transport winds.....Southwest 17 to 26 mph decreasing to around 16 mph after 3 am. ADI.................11 to 20. TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........41 50 55 56 57 58 54 51 47 44 41 39 Weather cov..... Weather type.... Tstm cov........ CWR.............10 10 10 10 10 0 0 0 0 0 0 0 Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0 Temp............80 77 75 73 72 72 71 71 70 68 67 67 RH..............54 60 62 66 68 66 68 68 71 76 78 78 20 FT wind dir..210 210 210 210 210 220 220 220 220 220 220 220 20 FT wind spd..10 10 9 8 8 8 7 7 7 6 6 6 20 FT wind gust.18 17 16 16 16 16 16 14 14 14 14 14 Mix hgt (kft)...0.1 0.1 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 Transp wind dir.210 210 210 210 220 220 220 220 220 220 220 220 Transp wind spd.26 24 22 22 21 20 20 18 18 17 16 16 ADI.............17 18 20 19 19 18 18 17 16 14 12 11 .WEDNESDAY... Sky/weather.........Mostly sunny (40-50 percent) then becoming mostly cloudy (80-90 percent). Chance of showers and thunderstorms late in the afternoon. Showers and chance of thunderstorms late in the afternoon. CWR.................10 percent increasing to 80 percent. Chance of thunder...40 percent. Temperature.........Max 86. RH..................Min 45 percent. Wind (20 ft)........Southwest winds 6 to 11 mph. Gusts up to 22 mph late in the morning. Gusty and erratic winds expected near thunderstorms late in the afternoon. Mixing height.......5200 ft AGL. Transport winds.....Southwest 15 to 24 mph increasing to 22 to 25 mph in the afternoon. ADI.................9 early in the morning increasing to 84 in the afternoon. TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........41 42 44 39 33 28 32 36 57 57 59 86 Weather cov..... CHC CHC CHC DEF Weather type.... RW RW RW RW Tstm cov........ CHC CHC CHC CHC CWR.............0 0 10 10 10 10 10 10 40 40 40 80 Chc of thdr (%).0 0 0 0 0 0 0 0 40 40 40 40 Temp............68 70 74 77 81 84 86 86 86 85 82 80 RH..............76 71 64 58 51 48 45 45 45 46 51 54 20 FT wind dir..220 230 230 230 230 230 220 220 220 220 230 240 20 FT wind spd..6 6 6 6 7 9 9 10 11 10 10 9 20 FT wind gust.14 14 13 14 14 16 17 17 18 17 16 14 Mix hgt (kft)...0.1 0.1 0.3 0.9 1.9 2.9 4.1 5.1 5.2 3.9 1.9 0.3 Transp wind dir.220 230 230 230 250 250 250 250 250 250 240 240 Transp wind spd.15 15 16 17 21 23 24 25 25 25 24 22 ADI.............9 10 16 34 54 72 81 84 79 64 43 25 $$ Forecaster...JM Requested by...Kathy Schwager Type of request...PRESCRIBED .TAG 2613909.0/OKX .DELDT 05/18/26 .FormatterVersion 2.0.0 .EMAIL kschwager@bnl.gov