Updates twice per day, weekdays, by 8AM and again by 7:30PM.
9AM and 7PM on Weekends.
Forecasts are for Southern NH (Nashua) to Keene NH with other locations noted.
(PB = Peterborough, NH) - (KE = Keene, NH)
The Weekend Outlooks are added every Thursday morning. (Forecasts through Sunday)
Hazardous Weather Outlook
National Weather Service Gray ME
402 AM EDT Sat Apr 19 2025
MEZ018-023-NHZ005>015-200815- Interior York-Coastal York-Southern Grafton-Southern Carroll- Sullivan-Merrimack-Belknap-Strafford-Cheshire-Eastern Hillsborough- Interior Rockingham-Coastal Rockingham- Western And Central Hillsborough- 402 AM EDT Sat Apr 19 2025
This Hazardous Weather Outlook is for southwest Maine, New Hampshire, central New Hampshire, northern New Hampshire and southern New Hampshire.
.DAY ONE...Today and tonight.
Hazardous weather is not expected at this time.
.DAYS TWO THROUGH SEVEN...Sunday through Friday.
Despite cool temperatures on Sunday, winds will gust to around 35 mph at times and minimum relative humidity values are expected to drop to around 15 to 25 percent. Scattered showers and thunderstorms are forecast this afternoon and evening and areas that miss out on wetting rainfall will be susceptible to elevated fire weather conditions Sunday.
The button below will be wobbling if there is a single advisory type. Click on the button and you will be taken to that page. If there are mutiple advisoies active, use the direct links above instead.
Mostly sunny, with a high near 66. Calm wind becoming south around 5 mph.
Mostly sunny, with a high near 62. Calm wind becoming southwest around 5 mph in the afternoon.
Mostly sunny, with a high near 66. Calm wind becoming south around 5 mph.
Showers likely, mainly after 2am. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.
Showers likely, mainly before 8am. Mostly cloudy, with a high near 71. Chance of precipitation is 60%.
Showers likely, mainly before 8am. Partly sunny, with a high near 67. Chance of precipitation is 60%.
A 30 percent chance of showers and thunderstorms after 5pm. Partly sunny, with a high near 80. West wind 5 to 15 mph, with gusts as high as 25 mph. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
A slight chance of showers before 2pm, then a slight chance of thunderstorms after 5pm. Partly sunny, with a high near 77. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Partly cloudy, with a low around 48. West wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 1am. Partly cloudy, with a low around 42. West wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunny, with a high near 59. Northwest wind around 15 mph, with gusts as high as 30 mph.
Sunny, with a high near 55. Northwest wind around 15 mph, with gusts as high as 30 mph.
Partly cloudy, with a low around 36. Northwest wind 5 to 10 mph.
Partly cloudy, with a low around 34. Northwest wind around 5 mph becoming calm in the evening.
Time of the readings below: 19 Apr 2025 4:04 PM
Current Temperature: 76.1°F (2.5)
High Temperature for today: 76.1 at 4:03 PM.
Low Temperature for Today: 54.2 at 6:15 AM.
Rainfall Today: 0.00 inches
Current Dewpoint Temperature: 58.7°F (0.8)
Hours of Daylight Tomorrow: 13:37
Lowest Windchill Reading Today: 53.9 at 12:25 AM
Still snowing in the west
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.
Skies were cloudy across the region this morning with some early showers moving across the north ahead of a warm front.
We remain dry here in southern NH.
I expect some breaks in the overcast here in Southern NH today, driving temps into the mid and upper 70s. Winds will be gusty.
By late in the day a cold front will approach the region with some showers and thunderstorms.
After the front passes, cooler air and very gusty winds move in. Easter Sunday looks sunny, pleasant, and much cooler with strong gusty winds.
The pollen count jumps. See the numbers in Weather Graphic #3.
On this day in 1775, the American Revolutionary War began when 700 British troops marched into Lexington to find 77 armed minutemen, led by Captain John Parker, waiting for them.
NEAR TERM, UNTIL 6 PM THIS EVENING
As of 640 AM EDT, a warm front is moving through the region. The initial round of showers is exiting the coast and eastern areas. Further upstream, there is some thunderstorm activity, known as convection, over northern New York. This convection is expected to move toward the mountains by mid morning. Areas south of the mountains are expected to stay mostly dry. Some high-resolution forecast models, specifically the 06Z CAMs, or Convective Allowing Models, indicated a greater eastward reach of thunderstorms later today. Based on these trends, the forecast has been updated to refine the probability of precipitation and to expand slight chances for thunder into the coastal plain.
Previously
Radar data shows showers moving west to east across northern New England as a warm front lifts through the region. Ground-level weather stations confirm this rain is reaching the surface, which means the lower atmosphere has become sufficiently moist. This first round of showers is expected to exit the area around sunrise. Upstream, a cluster of thunderstorms over Ontario is forecast to track near the Canadian border by mid morning. This will keep a chance of showers and possibly a brief thunderstorm over the mountains and northern zones.
South of the mountains, conditions are expected to remain mostly dry into the afternoon, with cloud cover beginning to thin. This clearing will allow temperatures to climb into the mid to upper 70s across most of New Hampshire and southwestern Maine. Southwest winds will become breezy, with gusts between 25 and 30 miles per hour. In the mountains and far north, temperatures may be limited to the 60s due to thicker cloud cover and an onshore wind keeping the Mid Coast cooler.
A cold front will approach from the northwest this afternoon, bringing renewed chances for showers and isolated thunderstorms across the mountains and into central and southern New Hampshire. The CAMs suggest that limited sunshine, combined with dewpoints rising into the mid 50s, will allow 500 to 1000 joules per kilogram of ML CAPE, or Mixed Layer Convective Available Potential Energy, to build in advance of the front. This is a measure of the atmosphere?Äôs potential to support thunderstorm development. However, dry air aloft may limit how widespread these storms become. Recent trends show a modest increase in thunderstorm potential for mid to late afternoon. Inverted V soundings, which are vertical temperature and moisture profiles that indicate dry air near the surface, suggest any strong storms could produce gusty winds. However, confidence is not high enough to include stronger storm language in the forecast. The highest chance for gusty storms will be across central and southern New Hampshire into southwestern Maine.
SHORT TERM, 6 PM THIS EVENING THROUGH 6 PM SUNDAY
The cold front will continue to move across the area this evening and tonight. Thunderstorm activity is expected to fade around sunset. As the front moves offshore, cooler and drier air will move in with strengthening northwest winds. Low temperatures tonight will range from the low 30s in the north to the mid 40s in the south.
The pressure gradient force, referred to as PGF, will become stronger on Sunday between a deepening low pressure system over the Canadian Maritimes and high pressure building over the Great Lakes. Winds at the top of the mixed layer, or the well-mixed portion of the atmosphere near the surface, are expected to reach around 40 knots. With good vertical mixing, surface wind gusts are forecast to reach 35 to 40 miles per hour, especially in eastern areas and the mountains. This same mixing process will also bring drier air to the surface, causing relative humidity to drop to around 20 percent south of the mountains. The combination of gusty winds and low humidity will lead to elevated fire weather concerns. Otherwise, Sunday will be mostly sunny with high temperatures ranging from the low 40s in the north to the mid 50s in the south.
LONG TERM, SUNDAY NIGHT THROUGH FRIDAY
12 AM EDT Long Term Update
There is little change in the latest National Blend of Models (NBM) guidance. After a dry Monday, rain chances will increase Monday night into Tuesday as a weak triple point low pressure system approaches from the west. A triple point refers to the intersection of three different air masses, typically cold, warm, and occluded fronts, which can enhance lift and precipitation. After this, mainly dry weather and near-seasonable temperatures are expected for the middle of next week.
Previously
Key Message: The progression of spring continues, with temperatures fluctuating between cool and warm periods. There are two solid signals for precipitation, one around Tuesday and another later in the week. The timing of the second system remains uncertain.
Forecast Details: Confidence is high for rain on Tuesday. Like the event expected Saturday, models show a light but widespread rain event. The best chance for measurable rain will be in northern areas, where fire danger is already lower. This will be monitored through midweek.
By late in the week, a trough over the western United States combined with a broad ridge over the East will lead to a fast-moving weather pattern. A trough refers to an area of lower pressure aloft that typically brings cooler and unsettled weather, while a ridge brings warmth and dryness. Due to uncertainty in the timing of individual systems, the chance for precipitation is spread over several forecast periods. Using chance wording remains appropriate given the current level of forecast confidence.
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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
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SYNOPSIS... Warmer air moves into the area today as an area of low pressure tracks across Quebec with the attendant cold front crossing tonight. There will be chances of showers through sunrise with a break before chances of showers increase this evening as the cold front approaches. Northwest winds will gust 35-40 mph on Sunday in the wake of the cold front. High pressure builds in Sunday night into Monday. The next chance of showers arrives Monday night into Tuesday as low pressure approaches New England.
SYNOPSIS... Warm and breezy weather conditions expected today, with scattered showers arriving later this afternoon and evening. Drier and mild behind a cold front Sunday. Low pressure should pass by to our north Tuesday. High pressure then expected to linger nearby into Friday with above normal temperatures.
NEAR TERM /THROUGH TODAY/... Key Messages:
* Very warm and breezy with high temperatures well into the 70s to lower 80s, despite filtered sun.
SHORT TERM /TONIGHT THROUGH 6 PM SUNDAY/...
Key Messages:
* Cold front brings passing showers early tonight, but with cooler conditions and gusty NW winds up to 45 mph for overnight.
LONG TERM /SUNDAY NIGHT THROUGH FRIDAY/...
Key Messages:
* Dry for much of Monday with light winds.
* Showers Monday night into Tuesday and another round Friday.
* Temperatures next week slightly above normal.
See the current readings from my weather instruments here in Peterborough, NH by clicking on the Weather Vane Below.
A brief warm up surges in here on Saturday, along with passing showers and thunderstorms. That will usher in cooler and windy weather for Easter, but temperatures will stay seasonably mild through much of next week.
Clouds and scattered showers will pass through central and northern New Hampshire this morning. Some sun will develop later on, which will warm temperatures well into the 70s. With enough sun, highs in the lower 80s are possible in southern communities. An additional shower or thunderstorm is likely later this afternoon into this evening.
Evening showers and rumbles exit, with clearing overnight. It turns breezy and cooler by dawn.
Easter Sunday looks dry with lots of sunshine, but still cool and windy. Afternoon highs will be limited to the 50s.
Monday looks dry and partly sunny. Inland towns should see temperatures in the 60s, with 50s along/near the coast. Comfortable for spectators at the Boston Marathon, with showers possible after many runners have finished.
This section is updated every morning.
Last Update: 4/19 - 7:31 AM
The current average temperature spread for this time of year:
High: 55 Degrees
Low: 33 Degrees
Record High: 1976: 89 Degrees
Record Low: 1990: 19 Degrees
The Summits Forecast
THE FORECAST FOR MOUNT MONADNOCK, NH
Summits of Mount Monadnock and North Pack Monadnock Mountain
642 AM EDT Sat Apr 19 2025
...Recreation forecast for summits of Mount Monadnock and North Pack Monadnock mountain...
TODAY...Mostly cloudy. A chance of showers with a slight chance of thunderstorms this afternoon. Highs in the lower 70s. Southwest winds 10 to 20 mph with gusts up to 35 mph. Chance of rain 40 percent. TONIGHT...Mostly cloudy in the evening, then becoming partly cloudy. A chance of showers in the evening. Lows in the upper 30s. West winds 15 to 25 mph with gusts up to 40 mph. Chance of rain 50 percent. SUNDAY...Mostly sunny. Highs in the upper 40s. Northwest winds 15 to 25 mph with gusts up to 45 mph.
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