948
FNUS71 KOKX 191245
FWSOKX
SPOT FORECAST FOR BNL NORTHEAST COMPLEX A&I...BROOKHAVEN NATIONAL LAB
NATIONAL WEATHER SERVICE NEW YORK NY
845 AM EDT TUE MAY 19 2026
FORECAST IS BASED ON IGNITION TIME OF 0900 EDT ON MAY 19.
IF CONDITIONS BECOME UNREPRESENTATIVE, CONTACT THE NATIONAL WEATHER
SERVICE.
DISCUSSION
IT WILL BE HOT AND DRY TODAY. SCT TSTMS POSSIBLE ON WED WITH A
COLD FRONTAL PASSAGE. MIN RH IN THE 40S BOTH TODAY AND WED. SW
WINDS THRU TNGT BECOME NW LATE WED BEHIND THE FRONT.
REST OF TODAY
SKY/WEATHER.........SUNNY (10-20 PERCENT).
CWR.................0 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........75 AT IGNITION...MAX 87.
RH..................66 PERCENT AT IGNITION...MIN 45 PERCENT.
WIND (20 FT)........WINDS SOUTHWEST AT 6 MPH AT
IGNITION...OTHERWISE SOUTHWEST WINDS 6 TO 10
MPH. GUSTS UP TO 23 MPH LATE IN THE AFTERNOON.
MIXING HEIGHT.......900 FT AGL AT IGNITION...OTHERWISE 1200 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 14 TO 21 MPH.
ADI.................17 TO 28.
TIME (EDT) 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........23 16 11 8 20 24 22 14 16
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............0 0 0 0 0 0 0 0 10
CHC OF THDR (%).0 0 0 0 0 0 0 0 0
TEMP............75 79 82 83 86 86 86 87 84
RH..............66 58 53 51 48 46 48 45 49
20 FT WIND DIR..220 210 210 210 210 200 200 200 210
20 FT WIND SPD..6 6 6 7 8 9 9 10 10
20 FT WIND GUST.11 11 12 14 14 16 17 18 18
MIX HGT (KFT)...0.9 1.1 1.0 1.2 1.2 1.2 1.1 0.9 0.8
TRANSP WIND DIR.230 240 220 220 220 220 210 220 220
TRANSP WIND SPD.15 15 14 15 16 18 20 21 21
ADI.............19 21 19 23 26 28 28 23 17
TONIGHT
SKY/WEATHER.........PARTLY CLOUDY (35-45 PERCENT) THEN BECOMING
MOSTLY CLOUDY (55-65 PERCENT) THEN BECOMING
PARTLY CLOUDY (35-45 PERCENT).
CWR.................10 PERCENT.
CHANCE OF THUNDER...0 PERCENT.
TEMPERATURE.........MIN 68.
RH..................MAX 78 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 6 TO 9 MPH. GUSTS UP TO 21 MPH
EARLY IN THE EVENING.
MIXING HEIGHT.......400 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 15 TO 20 MPH.
ADI.................7 TO 16.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
SKY (%).........31 34 46 48 62 55 55 36 41 48 32 32
WEATHER COV.....
WEATHER TYPE....
TSTM COV........
CWR.............10 10 0 0 0 0 0 0 0 0 0 10
CHC OF THDR (%).0 0 0 0 0 0 0 0 0 0 0 0
TEMP............82 79 73 71 70 70 71 71 70 69 69 69
RH..............51 56 66 71 73 71 71 71 68 73 73 73
20 FT WIND DIR..220 210 220 220 220 220 220 220 220 220 220 220
20 FT WIND SPD..9 8 7 6 6 6 6 6 6 6 6 6
20 FT WIND GUST.17 16 14 14 14 14 13 13 13 13 13 13
MIX HGT (KFT)...0.7 0.6 0.5 0.5 0.5 0.5 0.5 0.5 0.5 0.4 0.4 0.5
TRANSP WIND DIR.220 220 230 230 210 220 220 230 240 240 250 240
TRANSP WIND SPD.20 18 18 17 16 16 16 17 16 15 15 15
ADI.............13 12 16 15 14 14 11 8 11 10 7 7
WEDNESDAY
SKY/WEATHER.........MOSTLY SUNNY (25-35 PERCENT) THEN BECOMING
MOSTLY CLOUDY (80-90 PERCENT). SLIGHT CHANCE OF
THUNDERSTORMS LATE IN THE AFTERNOON. SHOWERS
LATE IN THE AFTERNOON. CHANCE OF THUNDERSTORMS
LATE IN THE AFTERNOON.
CWR.................10 PERCENT INCREASING TO 80 PERCENT LATE IN THE
AFTERNOON.
CHANCE OF THUNDER...40 PERCENT.
TEMPERATURE.........MAX 86.
RH..................MIN 43 PERCENT.
WIND (20 FT)........SOUTHWEST WINDS 6 TO 10 MPH. GUSTS UP TO 22 MPH
IN THE AFTERNOON. GUSTY AND ERRATIC WINDS
EXPECTED NEAR THUNDERSTORMS LATE IN THE
AFTERNOON. GUSTY AND ERRATIC WINDS EXPECTED
NEAR THUNDERSTORMS LATE IN THE AFTERNOON.
MIXING HEIGHT.......2700 FT AGL.
TRANSPORT WINDS.....SOUTHWEST 14 TO 22 MPH.
ADI.................14 EARLY IN THE MORNING INCREASING TO 62 IN THE
AFTERNOON.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
SKY (%).........40 25 17 16 22 15 17 24 87 87 87 87
WEATHER COV..... DEF DEF DEF DEF
WEATHER TYPE.... RW RW RW RW
TSTM COV........ SCH SCH SCH CHC
CWR.............10 10 0 0 0 0 0 0 80 80 80 80
CHC OF THDR (%).0 0 0 0 0 0 0 0 20 20 20 40
TEMP............68 70 74 77 82 85 86 86 86 86 86 85
RH..............78 73 66 60 51 45 43 45 45 46 46 50
20 FT WIND DIR..220 230 230 240 230 230 220 220 220 220 230 240
20 FT WIND SPD..6 6 6 6 7 8 9 9 10 9 8 7
20 FT WIND GUST.12 11 12 12 14 14 16 17 18 17 16 14
MIX HGT (KFT)...0.4 0.5 0.6 1.1 1.4 1.7 2.5 2.7 2.4 1.1 1.0 0.9
TRANSP WIND DIR.240 250 250 260 260 260 260 250 230 230 230 230
TRANSP WIND SPD.14 14 14 16 16 18 18 21 21 22 18 15
ADI.............14 14 14 22 30 41 53 62 59 29 23 16
FORECASTER...FEB
REQUESTED BY...KATHY SCHWAGER
TYPE OF REQUEST...PRESCRIBED
.TAG 2613909.1/OKX
.DELDT 05/19/26
.FORMATTERVERSION 2.0.0
.EMAIL KSCHWAGER@BNL.GOV
CLICK HERE TO GO TO PREVIOUS BULLETINS.
Main Text Page