015
FNUS71 KOKX 281529
FWSOKX

Spot Forecast for BNL Northeast Complex Unit C/D...Brookhaven National Lab
National Weather Service New York NY
1129 AM EDT Sun Apr 28 2024

Forecast is based on ignition time of 0600 EDT on April 29.
If conditions become unrepresentative, contact the National Weather
Service.

631-924-0383

.DISCUSSION...
Mostly dry conditions are expected on Monday. A spotty rain shower is
possible late in the day, but coverage is expected to be isolated. Light
NW flow becomes southerly toward mid to late afternoon with sea breeze
development. Speeds remain at or under 10 kt. RH values fall into the
40 to 50% range during the day.

.MONDAY...

Sky/weather.........Mostly sunny (40-50 percent).
CWR.................10 percent.
LAL.................No Tstms.
Temperature.........55 at ignition...Max 81.
RH..................96 percent at ignition...Min 41 percent.
Wind (20 ft)........Winds northwest at 4 mph at
                    ignition...otherwise Light winds becoming
                    northwest 5 to 6 mph in the morning and early
                    afternoon, then shifting to the south around 6
                    mph late in the afternoon.
Mixing height.......0 ft AGL at ignition...otherwise 6700 ft AGL.
Transport winds.....Northwest 9 to 16 mph shifting to the south 7
                    to 9 mph late in the afternoon.
Smoke dispersal.....Poor /700 knot-ft/ at ignition. Max...excellent
                    /93600 knot-ft/.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........52  48  44  43  42  42  43  45  47  46  44  43
Weather cov.....
Weather type....
Tstm cov........
CWR.............10  10  0   0   0   0   0   0   0   0   0   0
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............55  57  60  65  69  74  77  80  81  81  79  76
RH..............96  93  87  73  66  55  50  44  42  41  44  48
20 FT wind dir..300 310 320 330 340 350 340 320 310 280 200 170
20 FT wind spd..4   5   5   5   6   6   6   6   6   6   6   6
20 FT wind gust.7   7   7   7   7   7   7   7   7   7   7   8
Mix hgt (kft)...0.1 0.1 0.3 1.3 2.7 4.1 5.3 6.3 6.7 6.4 5.7 4.5
Transp wind dir.300 310 320 330 340 350 340 330 320 280 210 170
Transp wind spd.9   10  12  12  10  10  13  15  16  13  9   7
Vrate kt-ft/1K..1   0   2   10  23  39  62  85  94  70  40  21
Ventrate Cat....PR  PR  PR  PR  PR  PR  GD  GD  GD  GD  FR  PR

.MONDAY NIGHT...

Sky/weather.........Partly cloudy (45-55 percent) then becoming
                    mostly cloudy (60-70 percent).
CWR.................10 percent.
LAL.................No Tstms.
Temperature.........Min 50.
RH..................Max 93 percent.
Wind (20 ft)........Southeast winds 5 to 6 mph in the evening
                    becoming light, then becoming east around 5 mph
                    overnight becoming light becoming east around 5
                    mph early in the morning.
Mixing height.......0 ft AGL.
Transport winds.....Southeast 9 to 16 mph shifting to the east
                    around 12 mph after 3 am.
Smoke dispersal.....Fair (19800 knot-ft) early in the evening.

TIME (EDT)      6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........46  50  53  54  55  56  57  57  58  63  68  73
Weather cov.....
Weather type....
Tstm cov........
CWR.............0   0   10  10  10  10  10  10  10  10  10  10
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............70  63  58  56  55  55  54  53  52  51  50  50
RH..............57  67  77  80  83  83  83  86  89  93  93  93
20 FT wind dir..160 150 150 150 140 130 130 120 110 110 100 100
20 FT wind spd..6   6   6   6   5   5   4   4   5   4   4   5
20 FT wind gust.8   8   8   8   7   7   6   6   6   6   6   6
Mix hgt (kft)...3.1 1.5 0.3 0.1 0.1 0.3 0.3 0.3 0.3 0.3 0.3 0.3
Transp wind dir.160 150 150 150 140 130 130 120 110 110 100 100
Transp wind spd.9   13  16  15  13  12  10  12  12  12  12  12
Vrate kt-ft/1K..20  22  24  M   M   M   M   M   M   M   M   M
Ventrate Cat....PR  PR  PR  M   M   M   M   M   M   M   M   M

.TUESDAY...

Sky/weather.........Mostly cloudy (70-80 percent).
CWR.................10 percent.
LAL.................No Tstms.
Temperature.........Max 61.
RH..................Min 62 percent.
Wind (20 ft)........East winds 5 to 8 mph.
Mixing height.......2500 ft AGL.
Transport winds.....Southeast 12 to 21 mph.
Smoke dispersal.....MISSING.

TIME (EDT)      6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........74  75  76  75  75  74  75  76  78  77  76  75
Weather cov.....
Weather type....
Tstm cov........
CWR.............10  10  10  10  10  10  10  10  10  10  10  10
LAL.............1   1   1   1   1   1   1   1   1   1   1   1
Temp............50  52  53  55  57  58  59  59  59  59  59  58
RH..............93  86  83  77  72  69  67  64  64  62  62  64
20 FT wind dir..100 100 100 100 100 100 100 110 110 110 110 110
20 FT wind spd..5   5   6   6   6   7   8   8   8   8   8   7
20 FT wind gust.7   7   8   10  10  10  11  12  13  12  12  12
Mix hgt (kft)...0.2 0.1 0.3 0.8 1.5 2.1 2.4 2.5 2.5 2.4 2.2 1.9
Transp wind dir.100 100 100 110 120 130 140 140 140 140 140 140
Transp wind spd.12  13  14  16  18  20  21  21  20  20  18  18
Vrate kt-ft/1K..M   M   M   M   M   M   M   M   M   M   M   M
Ventrate Cat....M   M   M   M   M   M   M   M   M   M   M   M

$$
Forecaster...DR
Requested by...Kathy Schwager
Type of request...PRESCRIBED
.TAG 2412632.0/OKX
.DELDT 04/28/24
.FormatterVersion 2.0.0
.EMAIL kschwager@bnl.gov