Spot Forecast
Issued by NWS Boston, MA
Issued by NWS Boston, MA
887 FNUS71 KBOX 290028 FWSBOX Spot Forecast for Pratt Farm Rx...RI DEM National Weather Service Boston/Norton MA 828 PM EDT Sun Apr 28 2024 Forecast is based on ignition time of 1900 EDT on April 28. If conditions become unrepresentative, contact the National Weather Service. .DISCUSSION... A cold front slides through southern New England tonight bringing rain showers. Precipitation amounts are anticipated to remain less than 0.10 inches tonight for the Pratt Farm Rx area. Maximum relative humidities of 95 to 100 percent tonight. Dry and warm conditions Monday for the Pratt Farm area as high pressure builds in. Winds will be relatively light and the Pratt Farm area could see a local sea breeze slide in roughly between 12-3 PM. As it does winds will rapidly shift from the north to the south. Minimum relative humidities of 40 to 50 percent. .OUTLOOK...Wednesday through Saturday... Cool conditions Wednesday with a chance of showers as low pressure tracks to the south. Mainly dry and warmer conditions Thursday and Friday. Next period of unsettled weather arrives around Saturday. .REST OF TONIGHT... Sky/weather.........Mostly cloudy. Rain showers likely in the evening. Chance of rain showers, then slight chance of rain showers. Patchy fog after midnight. CWR.................8 percent increasing to 27 percent until just after midnight, then decreasing to 0 percent late in the night. Min temperature.....Around 53. Max humidity........95 to 100 percent. Dewpoint............53. Max apparent temp...60. Surface winds (mph).Southwest winds 5 to 7 mph in the evening becoming light. Wind (20 ft)........Southwest winds around 7 mph decreasing to around 5 mph early, then becoming light around midnight. Mixing height.......0 ft AGL. Transport winds.....Southwest 5 to 7 mph shifting to the northwest 6 to 7 mph late in the night. Smoke dispersal.....Poor (300 knot-ft). LVORI...............6. ADI.................2 to 5. Haines Index........3 to 4 or very low to low potential for large plume dominated fire growth. CEILING (KFT).......7.0 decreasing to 6.0 early, then decreasing to 4.5 late in the evening decreasing to 3.0 decreasing to 2.5 decreasing to 2.0 after midnight increasing to 3.0 increasing to 7.0 late in the night. TIME (EDT) 7PM 8PM 9PM 10P 11P MID 1AM 2AM 3AM 4AM 5AM Sky (%).........93 94 94 93 92 81 78 74 68 71 54 Weather cov.....LKY LKY LKY CHC SCH PTY PTY PTY PTY PTY PTY Weather type....RW RW RW RW RNF FOG FOG FOG FOG FOG FOG Tstm cov........ CWR.............10 30 30 30 30 30 30 0 0 0 0 Temp............60 57 56 55 55 55 56 56 56 56 56 Dewpoint........53 52 52 53 54 53 54 54 55 55 55 RH..............78 83 86 93 96 93 93 93 96 96 96 Heat index (F)..60 57 56 55 55 55 56 56 56 56 56 20 FT wind dir..SW SW SW SW SW W W W W NW NW 20 FT wind spd..7 5 5 5 3 3 3 3 3 3 3 20 FT wind gust.13 14 10 9 8 8 9 9 10 10 10 Surface wnd dir.SW SW SW SW SW W W W W NW NW Surface wnd spd.7 5 5 5 3 3 3 3 3 3 3 Surface wnd gst.13 14 10 9 8 8 9 9 10 10 10 Mix hgt (kft)...0.6 0.2 0.2 0.1 0.1 0.1 0.1 0.1 0.1 0.1 0.1 Transp wind dir.SW SW SW SW W W W W W W NW Transp wind spd.7 7 6 7 7 6 6 6 5 6 7 LVORI...........4 5 6 6 8 6 6 6 8 8 8 ADI.............5 5 4 5 3 3 3 3 2 3 3 Haines index....4 3 3 3 3 3 3 3 3 3 3 Vrate kt-ft/1K..4 1 1 1 1 1 1 0 0 0 0 Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR Ceiling (kft)...7.0 6.0 4.5 3.0 2.5 2.5 2.0 2.0 2.0 3.0 7.0 .MONDAY... Sky/weather.........Partly sunny. CWR.................0 percent. Max temperature.....Around 74. Min humidity........40 to 50 percent. Dewpoint............55 decreasing to 52 late in the afternoon. Max apparent temp...73. Surface winds (mph).North winds 5 to 8 mph shifting to the south 5 to 7 mph late in the afternoon. Wind (20 ft)........Northwest winds around 5 mph shifting to the north 6 to 8 mph until late afternoon, then shifting to the south 5 to 7 mph late in the afternoon. Mixing height.......2600 ft AGL. Transport winds.....Northwest 7 to 9 mph shifting to the north 6 to 13 mph through early afternoon, then shifting to the east around 5 mph late in the afternoon shifting to the south 6 to 7 mph late in the afternoon. Smoke dispersal.....Poor (1200 knot-ft) early in the morning increasing to fair (21200 knot-ft) in the afternoon. LVORI...............4. ADI.................7 to 13 increasing to 18 to 26 late in the morning, then increasing to 25 to 30 early decreasing to 10 to 19 in the afternoon decreasing to 6. Haines Index........2 to 3 or very low potential for large plume dominated fire growth. CEILING (KFT).......11 increasing to 15 early, then decreasing to 12 decreasing to 8.0 early decreasing to 7.0 decreasing to 6.0 early in the afternoon decreasing to 4.5. TIME (EDT) 6AM 7AM 8AM 9AM 10A 11A 12P 1PM 2PM 3PM 4PM 5PM Sky (%).........48 39 46 49 45 51 54 64 73 77 73 62 Weather cov..... Weather type.... Tstm cov........ CWR.............0 0 0 0 0 0 0 0 0 0 0 0 Temp............57 59 61 64 67 70 71 73 73 71 69 67 Dewpoint........55 56 57 56 56 55 54 53 52 52 52 52 RH..............93 90 87 75 68 59 55 49 48 51 55 59 Heat index (F)..57 59 61 64 67 70 71 73 73 71 69 67 20 FT wind dir..NW N N N N N N N N S S S 20 FT wind spd..5 7 8 8 8 8 8 7 6 5 6 7 20 FT wind gust.10 10 17 16 17 17 16 14 12 12 13 12 Surface wnd dir.NW N N N N N N N N S S S Surface wnd spd.5 7 8 8 8 8 8 7 6 5 6 7 Surface wnd gst.10 10 17 16 17 17 16 14 12 12 13 12 Mix hgt (kft)...0.2 0.4 0.5 1.2 1.9 2.6 2.5 2.4 2.2 1.8 1.3 0.9 Transp wind dir.W NW N N N N N N N E S S Transp wind spd.7 9 13 12 10 9 8 7 6 5 6 7 LVORI...........6 5 4 3 3 2 2 2 2 2 2 3 ADI.............7 10 13 18 26 30 25 19 15 10 10 6 Haines index....3 3 3 3 3 3 3 3 3 3 2 2 Vrate kt-ft/1K..1 3 6 12 17 21 18 14 11 7 7 5 Ventrate Cat....PR PR PR PR PR PR PR PR PR PR PR PR Ceiling (kft)...11 13 15 15 12 8.0 7.0 6.0 4.5 4.5 4.5 4.5 .MONDAY NIGHT... Sky/weather.........Partly cloudy then becoming mostly cloudy. CWR.................0 percent. Min temperature.....Around 48. Max humidity........86 percent. Dewpoint............48 decreasing to 45 early in the morning. Max apparent temp...63. Surface winds (mph).South winds 5 to 7 mph in the evening becoming light. Wind (20 ft)........South winds around 7 mph decreasing to 5 to 7 mph in the evening, then becoming light around midnight. Mixing height.......500 ft AGL. Transport winds.....South 2 to 7 mph shifting to the southeast 3 to 5 mph early in the morning. Smoke dispersal.....Poor (1100 knot-ft). LVORI...............5. ADI.................1 to 7. Haines Index........2 to 3 or very low potential for large plume dominated fire growth. CEILING (KFT).......4.0 decreasing to 1.5. TIME (EDT) 6 PM 8 PM 10 PM MIDNGT 2 AM 4 AM Sky (%).........34 46 64 71 84 84 Weather cov..... Weather type....NONE NONE NONE NONE NONE NONE Tstm cov........ CWR.............0 0 0 0 0 0 Temp............63 57 54 51 50 50 Dewpoint........50 48 49 47 45 45 RH..............62 72 83 86 83 83 Heat index (F)..63 57 54 51 50 49 20 ft wind......S 7 S 6 S 5 S 3 S 2 SE 3 20 ft wind gust.12 12 7 6 5 7 Surface wind....S 7 S 6 S 5 S 3 S 2 SE 3 Surface wnd gst.12 12 7 6 5 7 Mix hgt (ft)....800 600 500 500 500 500 Transport wind..S 7 S 7 SW 6 S 3 S 2 SE 3 LVORI...........3 3 5 6 6 5 ADI.............7 5 4 2 1 2 Haines index....2 3 3 3 3 3 Vrate kt-ft/1K..5 3 3 2 1 2 Ventrate Cat....POOR POOR POOR POOR POOR POOR Ceiling (kft)...4.5 4.5 4.0 3.5 3.5 2.5 .TUESDAY... Sky/weather.........Mostly cloudy. CWR.................0 percent. Max temperature.....Around 59. Min humidity........59 percent. Dewpoint............43. Max apparent temp...57. Surface winds (mph).Light winds becoming southeast 9 to 10 mph. Wind (20 ft)........Southeast winds 5 to 10 mph early in the morning becoming light, then becoming southeast 7 to 9 mph late in the morning increasing to 9 to 10 mph. Mixing height.......2200 ft AGL. Transport winds.....Southeast 5 to 12 mph. Smoke dispersal.....Poor (2200 knot-ft) early in the morning increasing to fair (21800 knot-ft) in the afternoon. LVORI...............3. ADI.................5 increasing to 24 to 30. Haines Index........2 to 3 or very low potential for large plume dominated fire growth. CEILING (KFT).......2.0 increasing to 2.5 in the late morning and afternoon. TIME (EDT) 6 AM 9 AM NOON 3 PM Sky (%).........84 73 78 73 Weather cov..... Weather type....NONE NONE NONE NONE Tstm cov........ CWR.............0 0 0 0 Temp............51 52 56 57 Dewpoint........45 45 45 43 RH..............80 77 66 59 Heat index (F)..51 52 56 57 20 FT wind......E 3G8 E 7G9 SE 9G14 SE 10G14 Surface wind....E 3G8 E 7G9 SE 9G14 SE 10G14 Mix hgt (ft)....600 1500 2200 2000 Transport wind..SE 5 E 8 SE 10 SE 12 LVORI...........4 4 3 2 ADI.............5 16 27 28 Haines index....3 2 2 2 Vrate kt-ft/1K..2 11 20 20 Ventrate Cat....POOR POOR POOR POOR Ceiling (kft)...2.0 2.5 2.5 2.5 $$ Forecaster...BL Requested by...Ben Arnold Type of request...PRESCRIBED .TAG 2412648.0/BOX .DELDT 04/28/24 .FormatterVersion 2.0.0 .EMAIL ben.arnold@dem.ri.gov