Spot Forecast
Issued by NWS San Juan, PR
Issued by NWS San Juan, PR
Versions:
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FNCA72 TJSJ 261357
FWSSJU
Spot Forecast for NWS/TEST...WFO SJU
National Weather Service San Juan PR
957 AM AST Thu Sep 26 2024
....THIS IS A TEST....THIS IS A TEST...
Forecast is based on forecast start time of 1000 AST on September 26.
If conditions become unrepresentative...contact the National Weather
Service.
Please contact our office if you have questions or concerns
with this forecast at
PHONE: 787-253-4586.
...HEAT ADVISORY IN EFFECT UNTIL 8 PM GMT THIS EVENING...
.DISCUSSION...
.TODAY...
Sky/weather.........Mostly sunny (45-55 percent). Scattered showers
early in the morning, then isolated showers
late in the morning. Scattered showers in the
afternoon.
Chance of pcpn......40 percent.
LAL.................1.
Max temperature.....Around 89.
Min humidity........69 percent.
Heat index..........MISSING.
Surface winds (mph).East winds around 5 mph increasing to 6 to 14
mph early in the morning.
Wind (20 ft)........East winds 5 to 13 mph.
Mixing height.......4900 ft AGL.
Transport winds.....East 6 to 15 mph increasing to 16 to 18 mph
late in the afternoon.
Smoke dispersal.....Poor (3000 knot-ft) early in the morning
increasing to excellent (66000 knot-ft) in the
afternoon.
Dispersion..........6.
Wave height.........Less than 1 foot.
Wave period.........0 SECONDS.
TIME (AST) 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........40 40 50 50 50 50 50 50
Weather cov.....ISO ISO SCT SCT SCT SCT SCT SCT
Weather type....RW RW RW RW RW RW RW RW
Tstm cov........
Chc of pcpn (%).20 20 30 30 30 30 30 30
LAL.............1 1 1 1 1 1 1 1
Temp............87 88 89 89 89 88 87 84
RH..............72 70 68 68 68 70 70 80
Heat index (F)..M M M M M M M M
20 FT wind dir..E E E E E E E E
20 FT wind spd..9 12 13 14 14 14 14 14
20 FT wind gust.10 15 17 17 17 18 18 17
Surface wnd dir.E E E E E E E E
Surface wnd spd.9 12 13 14 14 14 14 14
Surface wnd gst.10 15 17 17 17 18 18 17
Mix hgt (kft)...4.1 4.8 4.9 4.8 4.5 4.3 4.0 3.4
Transp wind dir.E E E E E E E E
Transp wind spd.12 14 15 15 16 17 18 18
Dispersion......6 6 6 6 6 6 6 6
Vrate kt-ft/1K..43 57 64 65 63 66 65 55
Ventrate Cat....FR FR GD GD GD GD GD FR
Wave period (s).0 0 0 0 0 0 0 0
Wave height (ft)0 0 0 0 0 0 0 0
.TONIGHT...
Sky/weather.........Partly cloudy (25-35 percent) then becoming
mostly cloudy (70-80 percent). Isolated showers
early in the evening, then scattered showers
late in the evening. Numerous showers and
isolated thunderstorms overnight.
Chance of pcpn......60 percent.
LAL.................1 until 2400, then 2.
Min temperature.....Around 78.
Max humidity........93 percent.
Heat index..........MISSING.
Surface winds (mph).East winds 5 to 12 mph decreasing to around 5
mph overnight.
Wind (20 ft)........East winds 5 to 8 mph in the evening becoming
light. Gusty and erratic winds expected near
thunderstorms overnight.
Mixing height.......0 ft AGL.
Transport winds.....East 6 to 15 mph decreasing to around 5 mph
overnight.
Smoke dispersal.....Good (31800 knot-ft) early in the evening
decreasing to poor (0 knot-ft) late in the
night.
Dispersion..........4.
Wave height.........Less than 1 foot.
Wave period.........0 SECONDS.
TIME (AST) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM
Sky (%).........30 30 30 70 70 70 80 80 80 80 80 80
Weather cov.....ISO ISO ISO SCT SCT SCT NUM NUM NUM NUM NUM NUM
Weather type....RW RW RW RW RW RW RW RW RW RW RW RW
Tstm cov........ ISO ISO ISO ISO ISO ISO
Chc of pcpn (%).20 20 20 50 50 50 60 60 60 60 60 60
LAL.............1 1 1 1 1 1 2 2 2 2 2 2
Temp............83 82 81 81 80 80 79 79 79 78 78 78
RH..............83 85 87 88 89 91 92 92 93 93 93 92
Heat index (F)..M M M M M M M M M M M M
20 FT wind dir..E E E E E E E E E E E E
20 FT wind spd..12 9 8 7 6 6 5 5 5 3 3 3
20 FT wind gust.15 10 9 8 7 7 6 6 6 5 5 5
Surface wnd dir.E E E E E E E E E E E E
Surface wnd spd.12 9 8 7 6 6 5 5 5 3 3 3
Surface wnd gst.15 10 9 8 7 7 6 6 6 5 5 5
Mix hgt (kft)...2.4 1.1 0.2 0.1 0.1 0.2 0.2 0.2 0.2 0.1 0.1 0.2
Transp wind dir.E E E E E E E E E E E E
Transp wind spd.15 12 8 7 6 6 6 5 5 5 5 5
Dispersion......6 6 5 4 4 4 4 3 3 2 2 2
Vrate kt-ft/1K..32 11 1 0 0 1 1 1 1 1 1 1
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR
Wave period (s).0 0 0 0 0 0 0 0 0 0 0 0
Wave height (ft)0 0 0 0 0 0 0 0 0 0 0 0
.FRIDAY...
Sky/weather.........Mostly cloudy (70-80 percent). Numerous showers
in the morning and early afternoon. Isolated
thunderstorms through the day. Scattered
showers late in the afternoon.
Chance of pcpn......60 percent.
LAL.................2.
Max temperature.....Around 90.
Min humidity........68 percent.
Heat index..........MISSING.
Surface winds (mph).East winds around 5 mph increasing to 5 to 10
mph.
Wind (20 ft)........Light winds becoming east 5 to 8 mph. Gusty and
erratic winds expected near thunderstorms.
Mixing height.......1200 ft AGL.
Transport winds.....East 6 to 10 mph.
Smoke dispersal.....Poor (1800 knot-ft).
Dispersion..........6.
Wave height.........Less than 1 foot.
Wave period.........0 SECONDS.
TIME (AST) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM
Sky (%).........80 80 80 80 80 80 80 80 80 70 70 70
Weather cov.....NUM NUM NUM NUM NUM NUM NUM NUM NUM SCT SCT SCT
Weather type....RW RW RW RW RW RW RW RW RW RW RW RW
Tstm cov........ISO ISO ISO ISO ISO ISO ISO ISO ISO ISO ISO ISO
Chc of pcpn (%).60 60 60 60 60 60 60 60 60 50 50 50
LAL.............2 2 2 2 2 2 2 2 2 2 2 2
Temp............81 83 85 87 88 89 90 90 90 89 88 85
RH..............86 81 77 74 72 70 68 68 68 69 72 78
Heat index (F)..M M M M M M M M M M M M
20 FT wind dir..E E E E E E E E E E E E
20 FT wind spd..5 5 6 6 7 8 9 9 10 9 7 6
20 FT wind gust.6 6 7 7 8 9 10 10 12 10 8 7
Surface wnd dir.E E E E E E E E E E E E
Surface wnd spd.5 5 6 6 7 8 9 9 10 9 7 6
Surface wnd gst.6 6 7 7 8 9 10 10 12 10 8 7
Mix hgt (kft)...0.4 0.7 0.9 0.9 0.9 0.9 1.0 1.2 1.2 1.0 0.7 0.5
Transp wind dir.E E E E E E E E E E E E
Transp wind spd.6 6 7 7 8 8 9 10 10 9 8 7
Dispersion......5 5 6 6 6 6 6 6 6 6 6 6
Vrate kt-ft/1K..2 4 5 6 6 6 8 10 11 9 5 3
Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR
Wave period (s).0 0 0 0 0 0 0 0 0 0 0 0
Wave height (ft)0 0 0 0 0 0 0 0 0 0 0 0
$$
Forecaster...O. Martinez
Requested by...Odalys Martinez
Type of request...OTHER
.TAG 2423081.0/SJU
.DELDT 09/26/24
.FormatterVersion 2.0.0
.EMAIL odalys.martinez@noaa.gov