New England Weather Discussion

(With thanks to the surrounding National Weather Service Offices)

Current Weather Readings:

(FYI: The number in parenthesis below is the change in the last hour)

• Time of the readings below: 12 Oct 2024 7:32 AM

• Current Temperature: 61.1°F (-0.6)

• High Temperature for today: 62.8 at 4:27 AM.

• Low Temperature for Today: 51.3 at 2:47 AM.

• Rainfall Today: 0.00 inches

• Current Dewpoint Temperature: 48.4°F (0.7)

• Hours of Daylight Tomorrow: 11:09

• Highest Heat Index Reading Today: 62.8 at 4:27 AM

  Find ALL of my instrument readings here

  Last Complete Site Update: 10/12 - 6:13 AM

  

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  Rich`s Weather Discussion

  The wind was howling early this morning here in the Monadnocks and across most of the region. A mild morning followed by a mild sunny day, but those gusty winds will continue for a time. Rain moves in Sunday.
  
  Hurricane Leslie is growing weaker, and will not last much longer.
  
  On this day in 1492, Christopher Columbus landed in the Bahamas, believing he reached East Asia. He claimed the land for Isabella and Ferdinand of Spain, who sponsored his attempt to find a western ocean route to China, India, and the fabled gold and spice islands of Asia.
  
  Fall Colors: Why and How in the Special Reports Section.
  

  A cold front is lurking just off to the north and west as of 3 AM this morning and is set to rapidly cross through the region over the next few hours. Most of the showery precip that occurs with this front will be confined to the mountains, and a chance of showers will hang around in the mountains through late morning or early afternoon as upslope flow kicks in behind the front. Expecting mostly sunny conditions south of the mountains, but there is a brief opportunity for some of these clouds and showers to spill over downwind of the mountains this morning before drier air looks to limit this potential more going into the afternoon. Highs are forecast to reach the mid-upper 50s in the foothills and then low-mid 60s farther south, but it will feel cooler with the gusty winds. It`ll be even cooler across northern areas with temps limited to the mid 40s to lower 50s.
  
  The main story today though will be the strong, gusty winds that quickly ramp up behind the cold front with good mixing bringing the higher winds from aloft. Per latest High Resolution guidance and forecast soundings, the strongest winds are expected to be roughly between 8AM this morning (maybe an hour so earlier for northern areas) and 3PM this afternoon with gusts of 30 to 40 mph and perhaps up to 40 to 45 mph on occasion (even higher gusts in the higher terrain), which is approaching Wind Advisory criteria. With leaves still on trees it`s certainly possible these winds gusts take down some tree branches and cause power outages in some areas. Winds still remain gusty going into late afternoon but should be on downward trend.
  
  Winds continue to diminish this evening and tonight, and initially mostly clear skies will give way to steadily increasing mid and high clouds moving in ahead of an area of low pressure that will bring widespread rainfall to the region Sunday into Monday. Temperatures are forecast to cool pretty quickly but may eventually level off as the clouds move in. Still, most are forecast to have lows in the 30s with patchy frost possible, but surface dewpoint depressions might end up being too large. A few of the convection-allowing models try to bring precip close to daybreak across southern NH, but I think the dry air will be too much to support anything other than a few sprinkles.
  
  On Sunday, an upper trough digs into the Great Lakes region, and at the surface, low pressure moves across the OH Valley and into PA while a warm front sets up just to our south. Out ahead of these features, clouds will continue to lower and thicken through the day with rain or sprinkles possible during the morning and early afternoon across southern NH and far SW ME. Accumulations up to this point will be limited to a hundredth or two as there will still be some dry air to overcome. Going into the afternoon, steadier rain will start overspreading the region from southwest to northeast as isentropic lift increases north of the warm front. This applies mainly to NH and southwest ME for Sunday afternoon, and areas to the north and east such as Jackman, Augusta, and the Midcoast may remain dry until more toward early Sunday evening. With clouds and rain moving in, temperatures may not make it out of the 40s across southern and western areas, but farther to the north and east, still expected temps to be able to reach the lower 50s.
  
  Long Range Forecast:
  
  Overview: Active Fall weather pattern to start the week as low pressure passes through the region and expands. Rain develops and continues to overspread the area Sunday evening and overnight into Monday. It will be windy across the mountains and higher terrain lasting into Wednesday as northwest winds bring wintry conditions to the higher peaks. A ridge of high pressure follows up into Thursday bringing quieter weather and the chance for a warm up.
  
  Details: Bulk of the precipitation will be stratiform rain Sunday night through early Monday. At least some chance of a burst of snow early on Sunday evening for far northern NH and far western ME. Isothermal layer lingers for a couple hours before warm nose moves in transitioning lower elevations to all rain. Will need to monitor trends here as the snow would likely be very wet and therefore heavy before the rain transition.
  
  How long rain lingers Monday will be a function of both how progressive the low is and its phase. Much guidance today is portraying a maturing low pulling north Monday afternoon, but runs leading up today were of a bit more progressive wave. With the latest trend, increased precip amounts through the afternoon, but am wary of a period of showery precip into the late afternoon. Enough moisture seems to remain to prevent too quick a transition to drizzle.
  
  The Sunday/Monday system will simply be a lobe of the broadening cyclonic circulation in northern New England and Canadian Maritimes. Thus cooler conditions and upslope mountain showers are set to continue into midweek. For the mountains, this could mean prolonged wintry conditions. Will have to see how quickly incoming ridging moves in behind the low, as that would bring quieter conditions and slightly warmer temperatures towards the late week period.
  

  Forecaster`s Discussion

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  Regional Synopsis

  New Hampshire and Maine

  SYNOPSIS...
  A cold front crosses this morning and will bring showers to the mountains and a period of strong, gusty winds this morning into early this afternoon. High pressure builds back into the region tonight into Sunday morning. Low pressure crosses the area Sunday night and Monday bringing widespread precipitation to the region. Cool and showery weather follows into the middle of next week.
  

  Massachusetts

  SYNOPSIS...
  A warming trend continues into Saturday as high pressure builds south of New England, but it becomes blustery tomorrow as a warm front crosses the region. Periods of rain arrive Sunday into Monday as low pressure tracks through southern New England. Dry weather follows for the rest of the week. Colder than normal temperatures give way to a warming trend by Thursday and Friday.
  
  LONG TERM /SUNDAY THROUGH FRIDAY/...
  Key Points:
  
  * Cooler with periods of rain Sunday into Monday
  
  * Dry weather follows. Below normal temperatures trend milder by the end of the week.
  

  Live Weather Link

  See the current readings from my weather instruments here in Peterborough, NH by clicking on the Weather Vane Below.

  

  Weather History for Today

  

  

  

  Patterns & Other Information