Spot Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
018 FNUS71 KBOX 041041 FWSBOX Spot Forecast for MSSF RX...DCR Fire National Weather Service Boston/Norton MA 641 AM EDT Sat May 4 2024 Forecast is based on ignition time of 0700 EDT on May 04. If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION... High pressure remains in control Saturday with dry weather. Calm winds early Saturday morning across coastal Plymouth county, will become east to northeast 10 to 15 mph from late morning into the afternoon. Minimum relative humidity Saturday afternoon will range from 50-60%. .OUTLOOK...Sunday through Wednesday... A low pressure system will bring widespread rain Sunday afternoon and night, with lingering showers into Monday morning across Plymouth county MA. Dry weather with developing sunshine northwest to southeast Monday afternoon. Dry weather continues Tuesday, then becoming unsettled mid to late next week, with a risk of showers at times. .REST OF TODAY... Sky/weather.........Mostly sunny then becoming partly sunny then becoming cloudy. CWR.................0 percent. Max temperature.....Around 53. Min humidity........71 percent. Dewpoint............42. Max apparent temp...52. Surface winds (mph).Northeast winds 7 to 9 mph. Wind (20 ft)........Northeast winds 7 to 9 mph. Mixing height.......2200 ft AGL. Transport winds.....Northeast 12 to 15 mph. Smoke dispersal.....Poor (10300 knot-ft) early in the morning increasing to fair (26500 knot-ft) in the afternoon. LVORI...............4. ADI.................16 increasing to 28 to 37. Haines Index........2 to 3 or very low potential for large plume dominated fire growth. CEILING (KFT).......23 decreasing to 14 early, then decreasing to 2.4 late in the morning decreasing to 0.8 increasing to 0.9 decreasing to 0.8 late in the afternoon decreasing to 0.7. TIME (EDT) 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........28 35 50 60 69 67 74 67 58 88 93 Weather cov..... Weather type.... Tstm cov........ CWR.............0 0 0 0 0 0 0 0 0 0 0 Temp............46 48 50 50 51 51 51 52 52 51 50 Dewpoint........42 42 43 43 43 43 43 43 43 42 42 RH..............86 80 77 77 74 74 74 71 71 71 74 Heat index (F)..42 44 46 46 51 51 51 52 52 51 47 20 FT wind dir..NE NE NE NE NE NE NE NE NE NE NE 20 FT wind spd..7 9 9 9 9 9 9 9 8 8 8 20 FT wind gust.14 16 16 16 17 16 14 14 14 14 14 Surface wnd dir.NE NE NE NE NE NE NE NE NE NE NE Surface wnd spd.7 9 9 9 9 9 9 9 8 8 8 Surface wnd gst.14 16 16 16 17 16 14 14 14 14 14 Mix hgt (kft)...1.0 1.4 1.6 1.8 2.0 2.0 2.1 2.2 2.0 1.9 1.7 Transp wind dir.NE NE NE NE NE NE NE NE NE NE NE Transp wind spd.12 14 14 15 15 15 14 14 14 13 13 LVORI...........4 3 3 3 3 3 3 3 3 3 3 ADI.............16 26 29 34 36 37 35 36 34 30 28 Haines index....2 2 2 3 3 3 3 3 3 3 3 Vrate kt-ft/1K..10 17 19 23 26 27 25 26 24 21 19 Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR Ceiling (kft)...23 14 2.4 0.8 0.8 0.9 0.9 0.9 0.8 0.8 0.7 .TONIGHT... Sky/weather.........Cloudy. CWR.................0 percent. Min temperature.....Around 42. Max humidity........93 percent. Dewpoint............42. Max apparent temp...46. Surface winds (mph).East winds 6 to 8 mph. Wind (20 ft)........East winds 6 to 8 mph. Mixing height.......500 ft AGL. Transport winds.....East 7 to 13 mph. Smoke dispersal.....Fair (16900 knot-ft) early in the evening decreasing to poor (3100 knot-ft) late in the night. LVORI...............5. ADI.................20 to 25 decreasing to 5 to 8 until just after midnight. Haines Index........3 or very low potential for large plume dominated fire growth. CEILING (KFT).......0.8 decreasing to 0.7 early in the evening, then increasing to 0.9 early decreasing to 0.7 late in the evening decreasing to 0.6 increasing to 0.7 increasing to 0.8 increasing to 0.9 early in the morning increasing to 1.0. TIME (EDT) 6PM 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........93 91 90 90 90 96 96 94 90 88 85 83 Weather cov..... Weather type.... Tstm cov........ CWR.............0 0 0 0 0 0 0 0 0 0 0 0 Temp............49 48 46 46 45 45 45 44 44 44 44 44 Dewpoint........42 43 43 43 43 43 42 42 42 42 42 42 RH..............77 83 89 89 93 93 89 93 93 93 93 93 Heat index (F)..46 45 42 43 42 42 42 41 41 41 41 41 20 FT wind dir..NE NE NE E E E E E E E E E 20 FT wind spd..8 7 7 6 6 6 6 6 6 6 6 6 20 FT wind gust.13 13 13 13 13 13 12 10 9 9 8 8 Surface wnd dir.NE NE NE E E E E E E E E E Surface wnd spd.8 7 7 6 6 6 6 6 6 6 6 6 Surface wnd gst.13 13 13 13 13 13 12 10 9 9 8 8 Mix hgt (kft)...1.5 1.3 1.2 1.0 0.9 0.8 0.7 0.7 0.6 0.6 0.5 0.5 Transp wind dir.E E E E E E E E E E E E Transp wind spd.13 12 12 12 10 10 9 9 8 8 7 7 LVORI...........3 4 5 5 6 6 5 6 6 6 6 6 ADI.............25 20 8 8 7 7 6 6 5 5 5 5 Haines index....3 3 3 3 3 3 3 3 3 3 3 3 Vrate kt-ft/1K..17 14 12 10 8 7 6 5 4 4 3 3 Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR Ceiling (kft)...0.8 0.7 0.9 0.7 0.6 0.6 0.7 0.7 0.8 0.9 1.0 1.1 .SUNDAY... Sky/weather.........Mostly cloudy. Slight chance of rain late in the afternoon. CWR.................0 percent increasing to 14 percent late in the afternoon. Max temperature.....Around 55. Min humidity........71 percent. Dewpoint............42. Max apparent temp...53. Surface winds (mph).Southeast winds 6 to 7 mph shifting to the south 8 to 9 mph in the afternoon. Wind (20 ft)........East winds around 6 mph shifting to the south 8 to 9 mph in the afternoon. Mixing height.......2200 ft AGL. Transport winds.....Southeast 8 to 13 mph shifting to the south 13 to 14 mph late in the afternoon. Smoke dispersal.....Poor (5400 knot-ft) early in the morning increasing to fair (24200 knot-ft) in the afternoon. LVORI...............4. ADI.................6 to 12 increasing to 27 to 33. Haines Index........3 to 4 or very low to low potential for large plume dominated fire growth. CEILING (KFT).......1.3 increasing to 2.0 late in the morning, then increasing to 2.5 early decreasing to 2.0 in the afternoon decreasing to 1.5. TIME (EDT) 6 AM 8 AM 10 AM NOON 2 PM 4 PM Sky (%).........84 86 68 66 79 91 Weather cov..... Weather type....NONE NONE NONE NONE NONE NONE Tstm cov........ CWR.............0 0 0 0 10 10 Temp............44 47 50 52 53 53 Dewpoint........41 44 44 44 44 44 RH..............89 89 80 74 71 71 Heat index (F)..41 44 47 52 53 53 20 ft wind......E 6 E 6 SE 7 SE 7 S 8 S 9 20 ft wind gust.8 9 10 10 12 14 Surface wind....E 6 E 6 SE 7 SE 7 S 8 S 9 Surface wnd gst.8 9 10 10 12 14 Mix hgt (ft)....800 1300 1900 2200 2200 1800 Transport wind..E 8 SE 10 SE 12 SE 12 S 13 S 14 LVORI...........5 4 3 3 3 3 ADI.............6 17 27 31 33 31 Haines index....3 3 4 4 3 4 Vrate kt-ft/1K..5 12 19 22 24 21 Ventrate Cat....POOR POOR POOR POOR POOR POOR Ceiling (kft)...1.3 1.7 2.2 2.5 2.0 2.0 $$ Forecaster...Nocera Requested by...Aaron Whiddon Type of request...PRESCRIBED .TAG 2413124.0/BOX .DELDT 05/04/24 .FormatterVersion 2.0.0 .EMAIL aaron.whiddon@mass.gov