2007-04-01: YMW upper air data from FSL's server at NOAA in Boulder, CO. Forecast max temp from AVN MOS for Whitefield NH from nws.noaa.gov. === Interpolations from YMW data - temps:deg. F, altitudes:feet MSL === MSL *TI* Wdir@kts trig VirT 1.7 degrees/division ("`": Dry Adiabatic) ----- ---- -------- ---- . ---- ----------------------------------------- 15000 19.9 89 | 8.9 ` : 14500 19.3 88 | 10.5 ` : 14000 18.6 305 21 86 | 12.0 ` : 13500 18.0 85 | 13.6 ` : 13000 17.7 85 | 15.7 ` : 12500 17.4 84 | 17.7 ` : 12000 16.6 300 24 83 | 19.1 ` : 11500 15.8 81 | 20.4 ` : 11000 15.0 80 | 21.5 ` : 10500 13.9 78 | 22.2 (CB:10600) ` : 10000 12.8 300 21 76 | 22.8 ` : 9500 11.6 295 20 74 | 23.4 ` : 9000 10.3 265 11 71 | 23.7 ` : 8500 9.0 69 | 24.0 ` : 8000 8.0 335 3 67 | 24.9 ` : 7500 6.9 65 | 25.6 ` : 7000 5.9 315 2 63 | 26.4 ` : 6500 4.6 61 | 26.9 ` : 6000 3.4 210 9 59 | 27.3 ` : 5500 2.3 57 | 28.0 ` : 5000 1.7 56 | 29.7 ` : 4500 1.2 175 12 55 | 31.4 ` : 4000 0.6 150 8 54 | 33.0 : 3500 -0.0 53 | 34.5 (High: 53) : 3000 -0.7 155 9 53 | 36.1 :` 2500 -1.3 52 | 37.6 :` 2000 -1.9 170 12 50 | 39.1 :` 1500 -2.6 49 | 40.7 : ` 1000 -4.0 175 4 47 | 40.7 : ` 500 -7.1 41 | 37.8 : ` === NWS Regional Summary - 330 AM EDT SUN APR 1 2007 === High pressure draped across New England brought clear and seasonably cold weather to the region overnight. 3 am readings ranged from the teens across the mountains to the lower and mid 20s elsewhere. Today we`ll begin April on a sunny and slightly warmer note as the high exits the coast and a light onshore flow develops. By afternoon, the sunshine will start to dim as clouds begin to spread in from the west. Temperatures will top out in the 50s in most locales, except along the immediate coast and the far north where it will be a few degrees cooler. Tonight a warm front will set up south of New England. The onshore flow will spread lower clouds and eventually light precipitation into Maine and New Hampshire. The precipitation will start as snow in most areas but will change to rain or a mixture in southern and coastal areas as the night progresses. On Monday, the onshore flow and the mixed bag of precipitation will continue over Maine and New Hampshire as the warm front remains stalled to our south. Temperatures will be hard pressed to exceed the 30s on Monday and then will drop back into the 20s and low 30s everywhere Monday night, changing the precipitation back to all snow inland and a messy mix as one draws nearer the coast. Some inland areas could pick up some light accumulations of snow Monday and Monday night but the coastal plain should get little if any accumulation. There could be a brief break in the pesky light precipitation Tuesday, but after that an upper level system drifts slowly our way and remains nearby into the weekend, resulting in unsettled and cool weather through the period. === The weather observed at WHITEFIELD, NH at 07:52 AM EST was: === The skies were clear. The prevailing visibility was 10 miles. Temperature: 30F ( -1C) Dewpoint: 19F ( -7C) Relative Humidity: 64% There was no wind. Pressure: 1026.1 millibars. Altimeter:30.26 inches of mercury. === The weather observed at MOUNT WASHINGTON, NH at 07:59 AM EST was: === The skies were mostly cloudy. The prevailing visibility was ***** miles. Temperature: 23F ( -5C) Dewpoint: -4F (-20C) Relative Humidity: 30% Winds from the NW (320 degs) at 23 mph. === MPV Terminal Aerodrome Forecast issued 1-Apr-2007 07:33 EDT === 8am: 00000kt P6sm Sct250 10am: 15004kt P6sm Sct250 12pm: 16006kt P6sm Sct150 Bkn200 4pm: 17007kt P6sm Bkn150 Ovc200 7pm: 17006kt P6sm Ovc080 9pm: 16005kt 6sm -shra Sct030 Ovc050 1am: 16005kt 4sm -shra Br Bkn012 Ovc020; Tempo 4-8am: 3sm -shra Br Ovc008