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: 2 Apr 2025 6:13 AM

• Current Temperature: 27.1°F (-0.3)

• High Temperature for today: 31.1 at 12:01 AM.

• Low Temperature for Today: 27.0 at 6:11 AM.

• Rainfall Today: 0.00 inches

• Current Dewpoint Temperature: 11.8°F (0.2)

• Hours of Daylight Tomorrow: 12:49

• Lowest Windchill Reading Today: 24.1 at 4:56 AM 

  Find ALL of my instrument readings here

  Last Complete Site Update: 4/01 - 6:09 PM

  

  Northern Lights - 3/21

  Rich`s Weather Discussion

  The winds will die down later tonight. It will be much colder tonight than last night.
  Increasing clouds on Wednesday will give way to snow and mixed precipitation breaking out by evening. 
  Snow Wednesday night with a period of mixed precipitation before it all turns to rain here in Southern NH. Farther north, a change to freezing rain and sleet seems likely.
  This all ends on Thursday with a dry Friday.
  The weekend is looking wet once again.
  Stay tuned.
  
  On this day in 1970, President Richard Nixon signed the Public Health Cigarette Smoking Act, banning cigarette advertisements on television and radio in the United States.
  

  NEAR TERM, UNTIL 6 AM WEDNESDAY MORNING
  
  Skies will remain mostly clear tonight. Winds will stay somewhat breezy this evening, then decrease overnight as high pressure moves in. Winds may not become as light as they did a couple of nights ago, which could keep the atmosphere mixed. Because of this, temperatures may not drop as much as some model guidance suggests. However, in sheltered valleys, cooler guidance has been blended in. Some high clouds moving in may also limit cooling. Low temperatures will mostly be in the 20s, but in areas where winds weaken and skies stay mostly clear, temperatures could fall into the teens.
  
  SHORT TERM, 6 AM WEDNESDAY THROUGH THURSDAY
  
  Wednesday will start with partly to mostly sunny skies as high pressure moves overhead. However, this will shift east in the afternoon as low pressure approaches the Great Lakes. Mid and high clouds will increase through the afternoon, making skies mostly cloudy as cloud cover thickens. Dry air in the lower atmosphere should keep most areas dry, but parts of New Hampshire may see a few snowflakes by sunset. High temperatures will be mostly in the 40s, but an early sea breeze could keep coastal areas in the upper 30s.
  
  Models are in good agreement with global forecasts, showing widespread precipitation spreading into the region Wednesday evening. Precipitation will taper off from west to east late Thursday morning into the afternoon. Most areas will start with snow, followed by a period of mixed precipitation as warm air moves in above the surface.
  
  Southern and coastal areas could see a brief period of sleet and freezing rain. However, guidance suggests surface temperatures will gradually warm from south to north, changing precipitation to rain before the morning commute. The Midcoast may hold onto freezing precipitation longer, so this will need to be monitored.
  
  Central and northern New Hampshire, along with areas from the foothills northward in Maine, are expected to see a more prolonged period of mixed precipitation. This could continue through the morning commute, leading to slick roads and hazardous travel. These areas could see a few inches of snow, a quarter to half an inch of sleet, and over a tenth of an inch of ice accumulation. Ice totals may be higher in elevated areas, with some locations receiving over a quarter inch of ice. There is a chance that cold air near the surface will refreeze falling precipitation before it reaches the ground. If this happens, more sleet and less freezing rain would occur in lower elevations, but confidence in this scenario is low. The current ice forecast presents a limited power outage risk, but this could increase if winds strengthen.
  
  The main area of precipitation will shift east and exit the region from late Thursday morning through the afternoon. A chance of rain showers will remain through the rest of the day as a cold front approaches. Skies will stay mostly cloudy, but increasing southerly winds will bring warming temperatures. A strong temperature contrast is possible, with southern New Hampshire reaching the 50s to low 60s, while northern and eastern areas stay in the 40s. However, temperatures in the 40s across the north will help melt any wintry precipitation that falls Wednesday night into Thursday morning.
  
  LONG TERM, THURSDAY NIGHT THROUGH TUESDAY
  
  Overview: Northern New England will be positioned between high pressure off the Southeast Coast and a trough, or extended area of low pressure, moving south through central Canada heading into the weekend. Surface high pressure will likely keep conditions mostly dry Friday and Friday night. The advancing trough will create a boundary between warm and cold air west of New England through the Ohio Valley. Waves of low pressure will track along this boundary, bringing periods of precipitation from Saturday through Monday. Temperature profiles suggest snow or a wintry mix in northern areas late Saturday before temperatures rise above freezing on Sunday, leading to mostly rain. Colder air will move in as the boundary shifts southeast Sunday night into Monday, bringing another chance for snow in northern areas.
  
  Impacts: Snow or a wintry mix could create slippery travel conditions in northern areas from late Saturday through Saturday night.
  
  Details: A cold front will move offshore Thursday night, but the core of the cold air will stay north of the region. This will allow for mild conditions Friday, with high temperatures ranging from the mid 40s in the north to the mid 60s in southern New Hampshire under mostly fair skies. High pressure will move overhead Friday night, allowing temperatures to drop into the 20s and low 30s.
  
  A low-pressure system will approach from the eastern Great Lakes on Saturday, bringing widespread precipitation Saturday afternoon. Forecast models suggest this will be an overrunning event, meaning warm air will move in over cold air, causing snow to develop from the White Mountains northward Saturday night. Due to uncertainty in precipitation types, the forecast keeps wording general, mentioning only rain and snow at this time. This setup does not strongly favor cold air damming, which occurs when cold air gets trapped at the surface. Because of the time of year, temperatures are expected to rise well above freezing Sunday, leading to mostly rain.
  
  Rain will continue through Sunday into Sunday night. As the trough in central Canada moves into the Northeast Sunday night into Monday, colder air will filter into the region. This could allow for a change to snow in the mountains and northern areas. However, by this time, the heaviest precipitation will have shifted south, leading to lighter amounts. The trough will linger over the Northeast through the middle of next week.
  

  Forcaster`s Discussion
  

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  Regional Synopsis

  New Hampshire and Maine

  SYNOPSIS... High pressure provides fair weather through Wednesday. Low pressure will bring a period of snow to wintry mix to rain across the area Wednesday night into Thursday. High pressure returns Friday into Saturday. Another low pressure system will bring another round of snow to wintry mix to rain Saturday night into Sunday. A drying trend follows Monday into Tuesday.
  

  Massachusetts

  SYNOPSIS... Continued dry weather for most of Wednesday with below normal temperatures, then an approaching warm front will bring a period of showers Wednesday night into Thursday morning, with pockets of mixed wintry precipitation possible across the interior at the onset Wednesday night. Milder conditions arrive Thursday into Friday, then trend cooler next weekend with unsettled conditions returning.
  
  * Colder tonight with below normal temperatures
  * Dry for most Wed with below normal temperatures
  * Low risk for some spotty freezing rain or light snow Wed night
  
  LONG TERM /THURSDAY THROUGH TUESDAY/...
  Key Messages:
  
  * Warm front passes through Thu with widespread showers and warmer conditions.
  
  * Cooler and drier Fri behind a cold front.
  
  * Unsettled weekend expected with a nearby frontal boundary.
  
  * Trough and cooler temperatures settle in early next week.
  

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

Weather History for Today