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: 23 Apr 2025 2:49 PM

• Current Temperature: 66.5°F (1.3)

• High Temperature for today: 66.5 at 2:48 PM.

• Low Temperature for Today: 43.9 at 5:41 AM.

• Rainfall Today: 0.00 inches

• Current Dewpoint Temperature: 34.1°F (1.1)

• Hours of Daylight Tomorrow: 13:48

• Lowest Windchill Reading Today: 43.9 at 5:41 AM 

  Find ALL of my instrument readings here

  Last Complete Site Update: 4/23 - 6:20 AM

  

  A Sunny, quiet, Spring Day ahead.

  Rich`s Weather Discussion

  I am expecting a new computer at some point. When it arrives there will be disruptions to the site update schedule, updates, my weather instrument feeds, etc.
  As anyone who has done a computer data migration is aware, these things can go easy, or be a mess. So FYI for now.
  The new website will go up once things settle down. 
  
  A sunny, pleasant, spring day ahead. In fact, the weather looks good into Friday with our next chance of showers Friday night into Saturday.
  
  Dark smoke billowed near the Jersey Shore yesterday as a fast-moving wildfire forced thousands to evacuate and closed a portion of a major highway. The Jones Road Wildfire was sparked in the Greenwood Forest Wildlife Management Area close to Barnegat Township in Ocean County, and had burned 13.2 square miles of land by last night, according to officials with the New Jersey Fire Service, who said the fire is currently 10% contained. More than 1,300 structures were threatened, and around 3,000 residents have been evacuated.
  
  The pollen count is high. See the numbers in Weather Graphic #3.
  
  On this day in 2005, YouTube co-founder Jawed Karim uploaded the platform's first video, Me at the zoo, marking the humble beginnings of what would become the world's largest video-sharing site.
  

  Near Term through Tonight
  
  An upper-level disturbance, called 500 millibar shortwave energy, is rotating through Northern New England. Surface high pressure is located to the southwest. Morning fog formed due to moisture trapped in the lowest layer of the atmosphere, but it will mix out as the sun rises.
  
  Winds from the west and northwest will bring dry air from Quebec into the region. Central and southern New Hampshire along with southwest Maine will experience downslope wind off the terrain, leading to mostly sunny skies. Upslope areas of the White Mountains and Longfellow Mountains will see more clouds as stable air is lifted by the terrain. A sprinkle is possible, especially in upslope regions of Franklin and Somerset counties in Maine, though any mountain could see one.
  
  In the sunny downslope areas, the atmosphere will be mixed up to about 5000 feet. Forecast soundings, which are vertical profiles of atmospheric conditions, show the mixed layer tapping into winds of 15 to 25 knots around the 900 millibar level, roughly 3000 feet above sea level.
  
  Fire weather concerns are present in southern New Hampshire, including the Monadnock Region, Merrimack Valley, Lakes Region, and interior Seacoast. Interior southwest Maine is also experiencing dry conditions. Forecasters included drier than average model data, specifically the 10th percentile from the National Blend of Models, to estimate dew points. This results in afternoon minimum relative humidity values around 20 to 30 percent in these regions. Winds gusting between 10 and 25 miles per hour along with low humidity increase fire weather risk. Elsewhere, relative humidity will be higher, ranging from 35 to 45 percent.
  
  High temperatures will reach the mid to upper 60s in southern New Hampshire, with some locations like Manchester and Nashua reaching 70 degrees. In the Lakes Region and southern Kennebec Valley, highs will be in the low to mid 60s. Northern New Hampshire and the northwestern mountains of Maine will be cooler, with highs in the upper 40s to mid 50s. The Midcoast of Maine will see highs in the upper 50s to low 60s.
  
  Tonight, high pressure will drift off the Cape Cod coast as upper-level winds become more west to east. Temperatures will fall into the 30s for most, with low 30s in the north and upper 30s in the south. The warmest areas, like the Merrimack Valley and the Seacoast, may stay in the low 40s. Winds will be light and variable with mostly clear skies.
  
  Short Term Thursday
  
  High pressure will continue drifting south of Georges Bank while an upper-level trough, or dip in the jet stream at the 500 millibar level, moves over Quebec. The day will be mainly dry until late afternoon, when rain chances increase from the northwest, affecting the northern half of the region.
  
  Winds will shift to the south and southwest, drawing moisture from the Gulf of Maine. High temperatures in the mountains will be in the upper 50s to low 60s. Coastal Maine, the Midcoast, and the Kennebec Valley will also see low 60s due to the onshore wind. Southern and south-central New Hampshire along with the Lakes Region of Maine will warm into the upper 60s to low 70s with help from southwest winds.
  
  Long Term Thursday Night through Tuesday
  
  11 PM EDT Update: No major changes to the extended forecast. Models agree on scattered showers Thursday night and a more widespread rain event likely on Saturday.
  
  Previous Discussion
  
  Overview: High pressure will move into the Atlantic Friday. A low-pressure system will pass through the Great Lakes and into New England by Friday night into Saturday. This brings the most significant chance for rain during this period. High pressure is expected to return early next week.
  
  Details: Dry conditions will continue into Friday as high pressure remains over the Atlantic. With clear skies and overnight cooling, temperatures could drop into the upper 30s or low 40s.
  
  A weak upper-level disturbance, called a shortwave trough, will move across northern Maine Friday night. This may bring scattered showers and possibly a thunderstorm.
  
  By Friday afternoon, return flow, which is air circling back toward the region around the high pressure, will increase as low pressure enters the Great Lakes. Forecasters are confident rain will develop over the weekend, although there is still uncertainty in the storm's exact path. Current model trends show the low pressure center staying south of the US and Canadian border, focusing rainfall over part of the region.
  
  This system could include convective elements, meaning some showers could be heavier or produce thunder, especially Saturday afternoon or evening. Although the rain may briefly intensify, the system is expected to move out quickly. Drier weather should return by Sunday morning. Another area of high pressure will move in for early next week, and this system will be broader compared to the one earlier in the week.
  
  

  Forcaster`s Discussion
  

  Join my email list and get the EVERY THURSDAY EVENING E-mail blast that details the upcoming weekend weather. Plan ahead for the upcoming weekend! This is the same list I use for Winter Storm Warnings, hurricane alerts, and other weather hazards. It is free and mostly ad free. Cancel at anytime. I do NOT harvest e-mail addresses, nor do I sell them.

  Site News

  Welcome to my website!
  Send me an E-mail if something is not working!
  03/13/2025 - Weather Graphic 3 now shows the Allergy report
  01/14/2025 -Working on Almanac Updates - Will appear in the updated site coming in March 2024
  01/02/2025 - Work begins on a brand new site
  
  Link to my weather instrument reading on Weather Underground - Weather Readings
  Precipitation totals have been updated through November - Link
  I have updated ALL contact me e-mail addresses on the site. If you tried one, and I did not respond, please try again. I ALWAYS respond.
  Contact e-mail
  Got a cool weather picture? Email it to me using the above address. Please let me know if I can use your name, and at the very least, include a location. Those pixs and video will be posted here: Storm Pix/Video Page.
  I feature a 'Picture of the Week' every Friday. Do you have a great picture you would like to share? I would be happy to post your best shots in that weekly feature. Contact me if you are interested.
  Traveling? A location in the world is posted every day in the USA/World Weather Section. Take a look at today`s place to avoid.
  

  Regional Synopsis

  New Hampshire and Maine

  SYNOPSIS... High pressure brings dry and seasonable conditions through the end of the work week. The next chance of rain arrives this weekend as low pressure tracks near New England. Best rain chances look to be on Saturday with drier weather for the tail end of the weekend.
  

  Massachusetts

  SYNOPSIS...
  Warm and dry today followed by a chilly night driven by radiational cooling. Rather mild and dry conditions continue with high pressure over New England to round out the end of the work week, though there is a low chance of a passing shower late Thursday evening/night for northern Massachusetts, majority of the region is dry. A system for Saturday brings the next chance for widespread rainfall, though exact details remain uncertainty. Drier conditions return late this weekend into early next week.
  
  NEAR TERM /THROUGH TONIGHT/...
  
  Key Messages...
  
  * Seasonable day with lots of sun and light winds.
  
  * Chillier night tonight outside of the urban centers.
  
  SHORT TERM /THURSDAY/... Short Term
  
  Key Messages...
  
  * Warmer on Thursday with quiet and dry weather, save for the chance of a spot shower in NW MA in the evening.
  
  LONG TERM /THURSDAY NIGHT THROUGH TUESDAY/...
  
  Key Messages:
  
  * Warm and mostly dry Friday, outside of a stray shower in northern Massachusetts Thursday evening/night.
  
  * The next chance for widespread rain comes in Saturday, but there are uncertainties with the exact timing.
  
  * Drier conditions Sunday into 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