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Weather for New England and the World

May, more than any other month of the year,
wants us to feel most alive
- Fennel Hudson

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Breaking Weather Headlines

Turning Mostly Sunny Today - Warmer

Mostly clear tonight - Patchy Fog

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High Temperatures Today
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Your Daily Forecast

Three Days at a time

Updates twice per day, weekdays, by 7:30AM 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)

Warnings and/or Advisories

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Monday

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Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 75. Calm wind becoming east around 5 mph in the afternoon.

Peterborough/Keene:
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Patchy fog before 8am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 76. Calm wind becoming southeast around 5 mph.

Monday Night

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Patchy fog after 3am. Otherwise, mostly clear, with a low around 53. Southeast wind around 5 mph becoming calm in the evening.

Peterborough/Keene:
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Mostly clear, with a low around 54. Calm wind becoming southwest around 5 mph.

Tuesday

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Patchy fog before 7am. Otherwise, sunny, with a high near 85. Calm wind becoming southwest around 5 mph in the afternoon.

Peterborough/Keene:
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Sunny, with a high near 85. Southwest wind 5 to 10 mph.

Tuesday Night

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Partly cloudy, with a low around 64. Southwest wind around 5 mph.

Peterborough/Keene:
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Partly cloudy, with a low around 62. Southwest wind around 5 mph becoming calm in the evening.

Wednesday

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Sunny and hot, with a high near 91. Southwest wind 5 to 10 mph.

Peterborough/Keene:
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Sunny, with a high near 87. Calm wind becoming southwest around 5 mph in the morning.

Wednesday Night

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Partly cloudy, with a low around 65.

Peterborough/Keene:
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Partly cloudy, with a low around 63.

Thursday

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Peterborough/Keene:
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Thursday Night

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Friday

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Friday Night

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Saturday

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Saturday Night

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Sunday

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Sunday Night

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More weather information, local and around the world

New England Weather Discussion

(With thanks to the surrounding National Weather Service Offices)
Time of the readings below: 20 May 2024 3:39 PM
Current Temperature: 78.0°F (0.7) 

High Temperature for the day: 78.7 at 3:15 PM.
Low Temperature for today: 51.0 at 6:17 AM.
Rainfall Today: 0.00 inches

Current Dewpoint: 61.5°F (2.2)
Hours of Daylight Tomorrow: 14:51
Find all of my instrument readings here.
Last complete site update: 5/20 - 5:53 AM
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It will feel like summer today and much of the week ahead. Enjoy it!
Surface high shifts offshore during today as ridging shifts into a more zonal flow by later in the day. This will allow surface flow to become more SW as flow aloft shift to the west. The stratus south and east of the mountains will begin to erode from inland first this morning, and eventually do so at the coast, but that may not be until midday or so. Also, the onshore flow near the coast will likely never shift to SSW, as it does this afternoon inland. Ultimately this will lead to a fairly wide differential in temps between the coast and inland areas, especially the CT valley where highs will reach into the upper 70s today, while inland areas south and east of the mountains should get to the low to mid 70s, and the coast will likely remain in the 60s today.

Skies should stay mainly clear away from the coast through the night , and with light winds this will allow temps to fall into the low to mid 50s across much of the area, although the coast will be the coolest, as it will never get out of the marine layer, and lows will fall to around 50. Another round of low coastal stratus is possible again late tonight, although should be limited to closer and the coast, and some models only bring into stratus into the mid-coast overnight.

On Tuesday, we line up pretty good with westerly flow aloft and SW flow near the surface, and this will advect some warm mid level air into the forecast area with temps aloft pushing 59F by the afternoon. This should be enough to push temps to 80-85 across much of the area away from the coast. Still we are likely to see see the flow shift to the south along the coast which will limit highs to 65-70 along the mid coast and 70-75 along the N-S oriented coast south of Casco Bay. There is a remnant Mesoscale Convective System (A complex of thunderstorms which becomes organized on a scale larger than the individual thunderstorms, and normally persists for several hours or more) that will be across southern Quebec late in the day. The 7AM model runs tend to keep this out of the forecast area until Tuesday evening, but may see some convection develop ahead of it the far north late in the afternoon.

Long range:
Overview... A building ridge along the Eastern Seaboard brings very warm conditions for much of the week, peaking midweek. Residual convection riding around the ridge brings a few chances for showers and storms over several days, with the greatest chance on Thursday as a cold front approaches from the north. Relatively cooler air returns by late in the week and the weekend.

Details...

Wednesday looks to be the peak of the heat, with temps warming into the low 90s across much of southern and western NH, and 80s elsewhere. Even the southern coastlines warm into the 80s with southwesterly flow, while the MidCoast warms into the 70s. As mentioned, there`s a little less certainty across the north on high temps where leftover morning convection could limit how high temps rise. Scattered afternoon showers and storms are also likely across northern areas Wednesday afternoon. There will be another deteriorating Mesoscale Convective System rounding the ridge again Wednesday night, but similar to the previous night`s it`s unclear at this point how robust this system will be by the time it reaches New England.

Thursday remains warm, but with a downward trend in temps underway. A cold front moves through during the daytime, with some showers and storms accompanying it, especially across the higher terrain. Thursday likely ends up be the warmest day for the MidCoast, with winds turning westerly in the afternoon and warming temps into the upper 70s to near 80. 80s are expected elsewhere, with one more day in the upper 80s across southern NH.

Behind the cold front, temps still look fairly warm downwind of the mountains on Friday. Temps warm into the 70s in most spots, with highs near 80 across southern NH. The mountains likely see more cloud cover and get deeper into the cooler airmass, keeping highs in the 60s.

Right now the weekend looks cooler as high pressure noses in from the north, but the warmth won`t be far off to the south. The high is not overly strong, and has been trending a bit weaker since yesterday. Should this trend continue, then the weekend would likely end up warmer with highs in the 70s, rather than the 60s. This forecast follows closer to that trend, but acknowledges that we could end up with a boundary of airmasses within the forecast area. This is one more item to monitor over the coming days.

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Site News

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Send me an
E-mail if something is not working!
05/01/2024 - I have updated the
annual rainfall Snowfall section.
04/21/2024: The Climate Panel has transitioned to the Summits forecast for Mount Monadnock. I hope this is helpful.

03/31/2024 -Weather Graphic #3 will transisition from the Flu report to the allergy report starting on 4/01/2024
12/31/2023 - The
Almanac section has been updated with 2024 data.
Link to my weather instrument reading on Weather Underground - Weather Readings
Precipitation amounts have been updated for April- 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:
weathermail@richlefko.com
Those pixs and video will be posted here: Storm Pix/Video Page. Please let me know if I can use your name, and at the very least, include a location.

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 to avoid, in the world, is posted every day in the USA/World weather page.
Take a look at today?Äôs place to avoid.

Regional Synopsis

SYNOPSIS...
Surface high pressure moves in today and will clear things out this afternoon and then anchor itself just offshore allowing for some seasonably warm temperatures. There`s a chance for some thunderstorms in the mountains late Tuesday into Tuesday night, with a better chance for showers and storms Wednesday afternoon and evening as a cold front approaches. An upper level trough will keep scattered showers over the region Friday. High pressure builds in from north over the weekend.

SYNOPSIS...
Today is the cornerstone of a pattern change towards more mild conditions though clouds and cool temperatures will still hang across the Cape. Much milder conditions Tuesday with heat peaking on Wednesday. Frontal passage Thursday, with increased thunderstorm chances, will usher in more seasonable temperatures for the holiday weekend.

LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/...

Highlights:

* Peak of the midweek very warm weather is Wednesday - 80s highs
with a few locations in the CT and Merrimack Valleys seeing a few
90 degree readings. Tolerable humidity levels.

* Cold front Thursday afternoon to early evening brings a reprieve
to the warmth but also could fuel scattered t-storms.

* Drier and with cooler, more seasonable temperatures Friday into
the Memorial Day Weekend.

Live Weather Readings

See the current readings from my weather instruments here in Peterborough, NH. 

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Click on the Wind Vane to see Live Weather Info

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Patterns and other information
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Weather Headlines 

Summer arrives on June. 20, 2024, at 4:51 PM EDT
Turning warmer early next week
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Renewal of severe storms across the Plains through early weekMemorial Day weekend forecast: South to remain hot, severe storm and smoke concerns farther north2024 NFL season schedules: Weather extremes that will impact gamesHouston metro rocked by 100 mph derecho that left 7 dead and over 1 million without powerDamaging thunderstorms to jolt Gulf Coast states into the weekendSome Houston residents could be ?Äòweeks?Äô without power as 90s heat returnsWe were all under water Afghans tell BBC of devastating floodingDangerous heat envelops Florida with feels-like temperatures topping 100 degreesThousands told to evacuate due to British Columbia, Canada wildfireCanada wildfire smoke is creating unhealthy air quality in the central, south USDeadly severe storms rake Gulf Coast with 82-mph winds, baseball-sized hail, tornadoesFlash Floods in Northern Afghanistan Sweep Away Livelihoods, Leaving Hundreds Dead and MissingKiller whale gang led by infamous White Gladis sinks ANOTHER yacht off Gibraltar coast amid fears of summer of attacks2024 tornado tally more than 100 higher than historical averageWatch: Michigan tornado flattens every single tree on property in 45 secondsSouthern Brazil Has Been Hit by the Worst Floods in 80 Years. At Least 37 People Have Died

Severe Weather Slowly Tracks East this Week

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Keeping an eye on this front...

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Five Day Allergy Forecast for Southern New Hampshire

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May Facts
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Regional Weather Discussions

Updated once in the morning-These are provided by the NWS, WMUR-TV, or me...
Manchester, NH:  Last update:  5/20 - 6:06 AM

Plenty of sunshine for the first half of this week as temperatures turn much warmer...a taste of summer, with some scattered storms down the line.

Stubborn clouds and fog this morning will gradually give way to some sunshine. Look for warmer air to return for the afternoon. Highs should reach the 70s to near 80 away from the coast (near the shore temps will be in the 60s.)

50s for most tonight under fair skies and some fog by morning.

As mentioned, a taste of summer is on the way for midweek. Temperatures surge well into the 80s Tuesday, with some parts of interior southern New Hampshire breaking 90 degrees for the first time this year by Wednesday afternoon. There's a chance for an isolated shower or t-storm Tuesday up north, but a better chance Wednesday night and Thursday ahead of some cooler temperatures to end the week.

Picture of the week - New every Friday
Lake Tekapo, New Zealand
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Current Boston Radar Loop - All Radars
Climate Information (Peterborough, NH)

This section is updated every morning.  
Last Update:  
5/20 - 6:04 AM
The current average temperature spread for this time of year:
High: 68 Degrees
Low: 44 Degrees 
Record High: 1989: 88 Degrees 
Record Low: 1991: 30 Degrees
Lake Winnipesaukee Water Temperature: 58 degrees

The Summits Forecast
THE FORECAST FOR MOUNT MONADNOCK, NH
Summits of Mount Monadnock and North Pack Monadnock Mountain
 327 AM EDT Mon May 20 2024

...Recreation forecast for summits of Mount Monadnock and North Pack Monadnock mountain...

TODAY...Cloudy this morning, then becoming partly sunny. Highs in the lower 70s. Light and variable winds.
TONIGHT...Partly cloudy in the evening, then becoming mostly clear. Lows in the upper 50s. Light and variable winds becoming southwest around 10 mph after midnight.
TUESDAY...Mostly sunny. Highs in the upper 70s. Southwest winds up to 10 mph with gusts up to 20 mph. 

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The latest National Weather Map direct from the NWS.

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