Spot Forecast
Issued by NWS Upton, NY
Issued by NWS Upton, NY
699
FNUS71 KOKX 120916
FWSOKX
Spot Forecast for BNL Northeast Complex G...Brookhaven National Laboratory/Brookhaven
National Weather Service New York NY
516 AM EDT Thu Jun 12 2025
Forecast is based on ignition time of 0600 EDT on June 12.
If conditions become unrepresentative, contact the National Weather
Service.
.DISCUSSION...
Dry conditions expected this morning. Initial winds early this
morning will be SW near 5 to 10 mph. SW to WSW winds will then
increase to near 10 to 15 mph by late this morning into this
afternoon. Wind gusts up to around 20 mph can be expected at times
late this morning and this afternoon. Wind gusts subside this
evening.
There is a slight chance of thunderstorms this evening with more
of a chance for showers late tonight and into early Friday. Winds
become more northwest to north late this evening and late tonight
into early Friday with speeds near 5 to 10 mph. Shower chances
lower for the rest of Friday with winds becoming more east near 10
mph.
Minimum relative humidity is forecast to range near 35 to 40
percent today and near 40 to 45 percent Friday.
.TODAY...
Sky/weather.........Sunny (10-20 percent).
CWR.................0 percent.
Chance of thunder...0 percent.
Temperature.........67 at ignition...Max 88.
RH..................78 percent at ignition...Min 39 percent.
Wind (20 ft)........Winds southwest at 6 mph at
ignition...otherwise West winds 6 to 10 mph.
Mixing height.......0 ft AGL at ignition...otherwise 7300 ft AGL.
Transport winds.....West 15 to 24 mph.
ADI.................7 early in the morning increasing to 119 in the
afternoon.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........3 5 6 6 5 5 5 6 6 12 17 23
Weather cov.....
Weather type....
Tstm cov........
CWR.............0 0 0 0 0 0 0 0 10 10 10 10
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............67 70 73 77 80 83 85 86 87 88 87 86
RH..............78 76 71 62 56 49 46 45 42 39 39 39
20 FT wind dir..230 240 240 240 250 250 250 250 250 250 260 260
20 FT wind spd..6 6 7 8 9 10 10 10 10 10 10 9
20 FT wind gust.7 7 10 10 12 16 16 16 16 16 16 14
Mix hgt (kft)...0.1 0.1 0.3 1.5 3.0 4.5 5.3 5.9 6.2 6.9 7.3 7.1
Transp wind dir.230 240 240 250 260 270 270 280 280 280 280 280
Transp wind spd.15 16 18 20 20 21 21 21 22 23 24 24
ADI.............7 10 19 38 61 81 90 95 98 110 119 116
.TONIGHT...
Sky/weather.........Partly cloudy (35-45 percent) then becoming
mostly cloudy (60-70 percent). Slight chance of
showers and thunderstorms early in the evening.
Chance of showers overnight.
CWR.................10 percent increasing to 20 percent early in
the evening, then decreasing to 10 percent late
in the evening increasing to 30 percent
overnight.
Chance of thunder...15 percent.
Temperature.........Min 62.
RH..................Max 78 percent.
Wind (20 ft)........West winds 5 to 7 mph early in the evening
becoming light. Gusty and erratic winds
expected near thunderstorms early in the
evening.
Mixing height.......100 ft AGL.
Transport winds.....West 15 to 22 mph becoming north 3 to 12 mph in
the late evening and overnight, then decreasing
to around 2 mph after 3 am.
ADI.................85 early in the evening decreasing to 0 late in
the night.
TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........33 42 52 52 51 51 59 67 75 73 72 70
Weather cov..... SCH SCH SCH CHC CHC CHC CHC
Weather type.... RW RW RW RW RW RW RW
Tstm cov........ SCH SCH SCH
CWR.............10 10 20 20 20 10 10 10 30 30 30 30
Chc of thdr (%).0 0 20 20 20 0 0 0 0 0 0 0
Temp............83 80 77 74 72 70 68 67 65 63 62 62
RH..............44 52 60 66 66 68 70 73 75 78 78 78
20 FT wind dir..260 260 260 280 320 340 350 000 000 000 000 000
20 FT wind spd..7 6 5 4 3 3 3 2 2 2 1 1
20 FT wind gust.13 8 6 6 5 5 5 4 4 4 2 2
Mix hgt (kft)...5.6 3.5 1.7 0.8 0.4 0.3 0.1 0.2 0.3 0.2 0.1 0.3
Transp wind dir.280 290 290 310 330 340 350 000 000 000 000 000
Transp wind spd.22 18 15 12 9 7 6 5 5 3 2 2
ADI.............85 44 10 0 0 3 2 2 2 1 0 1
.FRIDAY...
Sky/weather.........Partly sunny (60-70 percent). Chance of showers
early in the morning, then slight chance of
showers early in the morning.
CWR.................30 percent decreasing to 10 percent.
Chance of thunder...0 percent.
Temperature.........Max 77.
RH..................Min 43 percent.
Wind (20 ft)........Light winds becoming northeast around 5 mph
late in the morning, then shifting to the
southeast 5 to 6 mph in the afternoon.
Mixing height.......4100 ft AGL.
Transport winds.....Northeast 3 to 6 mph shifting to the southeast
7 to 8 mph late in the afternoon.
ADI.................4 to 34.
TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........68 65 63 65 67 70 66 62 58 58 58 58
Weather cov.....CHC CHC SCH SCH SCH SCH SCH SCH
Weather type....RW RW RW RW RW RW RW RW
Tstm cov........
CWR.............30 30 20 20 20 20 20 20 10 10 10 10
Chc of thdr (%).0 0 0 0 0 0 0 0 0 0 0 0
Temp............63 66 69 71 73 74 76 76 77 77 76 75
RH..............75 68 61 55 49 46 43 43 43 43 45 48
20 FT wind dir..010 010 020 030 050 060 070 110 120 130 140 140
20 FT wind spd..1 1 2 3 4 5 5 5 6 6 6 6
20 FT wind gust.2 2 4 5 6 6 6 7 7
Mix hgt (kft)...0.7 1.4 2.1 2.6 3.1 3.5 3.8 4.1 4.1 4.0 3.7 3.1
Transp wind dir.010 030 040 040 050 060 070 110 120 130 140 140
Transp wind spd.3 5 6 6 6 6 6 7 7 7 8 8
ADI.............4 9 14 18 21 24 29 32 34 34 31 26
$$
Forecaster...JM
Requested by...Kathy Schwager
Type of request...PRESCRIBED
.TAG 2515765.1/OKX
.DELDT 06/12/25
.FormatterVersion 2.0.0
.EMAIL kschwager@bnl.gov