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I use abbreviations for many things:
PB = Peterborough
KE = Keene NH
Precip = Precipitation
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I am based in Peterborough, NH, but the main forecasts (for now) are for Nashua, NH and the region. I send out an e-mail every Thursday that covers the upcoming weekend forecast. I also send out advisories when issued by the NWS to this list. You will NEVER get SPAM or e-mail from anyone else. I don't share my mail list with anyone. If you'd like to be a part of that mailing, send your e-mail address to: Mail List

What is a "ShortWave"?

Also known as Shortwave Trough; a disturbance in the mid or upper part of the atmosphere which induces upward motion ahead of it. If other conditions are favorable, the upward motion can contribute to thunderstorm development ahead of a shortwave.

MCS = Mesoscale Convective System (Bunch of thunderstorms)

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How I started...

I've been a weather hobbyist all of my life. As a child, I used to stand outside in the rain during thunderstorms just to watch the lightning. Back in the '70s getting weather information was a chore. I remember listening to NWS broadcasts during hurricane season and plotting these on a piece of paper. After moving to New England I finally bought my first real weather station made by Davis Instruments. I began to record daily weather data in a journal. I had a few people, where I work, who knew I was a weather nut, ask me to send them an e-mail on the weekend forecast. So two grew to five then 15, then 40, and now my Thursday weekend mail list reaches over 200+ people. I took some web programming classes in the late '90s and a few years after that RichLefko.com was born. I wanted to share my hobby with anyone who was interested, and I am quite overwhelmed with how many people seem to be interested. I've gotten so many "thank you's" for a variety of reasons..."saved my party", "saved my wedding", "saved my life." It's been fun and rewarding all at the same time.
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Breaking Weather Headlines:

Snow/mixed precip late tonight/Tuesday morning

Winter Weather Advisories for South Central and western NH. Central/Western MA

See the snowfall estimates in the "Winter Weather Center" panel below


See my detailed instrument readings

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Snow and mixed precipitation move in

See local snowfall estimates in the "Winter Storm" panel below

Arctic Cold Follows the Tuesday Storm

Arctic blast of cold air follows the early week storm

It will be very cold outside


A stormy Pattern into the Christmas Holiday

Winter Weather Center 2017


Snowfall Estimates Monday night/Tuesday - Check back

All advisory links can be found here

These maps were updated at 5:30 PM 12/11


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This Day in Weather History

Today's Interesting Fact, Place, or Phenomena

World Weather Hot Spot or Today's Worst Weather

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See the Local Weather Discussion below...

 

Welcome to Fall in New England


Winter arrives on December 21st at 11:28 AM EST

Laugh for Today
You might be a Red neck if...
"You've slept on half the sofas in your town
"
— Comedian Jeff Foxworthy

Rich's Local Weather Discussion
Regional Weather Discussion

Your Daily Forecast 3 Days at a Time

Updates twice per day, weekdays, at 7:00AM and again by 7:30PM- 9AM/7PM on Weekends
Forecasts are for Southern NH (Nashua) with other locations noted.
(PB = Peterborough, NH) - (KE = Keene, NH)

Last Updated: Monday, December 11, 2017 6:29 PM

If the Advisory logo above is flashing, go to the Advisories link in the navigation menu,
which can be found on left side of the page. Or click on the links below.

Winter Weather Advisory - South Central/Western NH - 5PM - 12/11
Winter Weather Advisory - North Central MA - 5PM - 12/11
Winter Weather Advisory - South Central MA - 5PM - 12/11


Click on any links above to go to the warning pages

Go to the "Winter Weather Center" panel above for snowfall estimates in New England

New Hampshire

None-See above

Massachusetts

This Hazardous Weather Outlook is for eastern Massachusetts,
northeastern Massachusetts, southeastern Massachusetts, northern
Rhode Island and southern Rhode Island.

Tuesday through Sunday.

Tuesday night through early Thursday morning...

An arctic cold front will bring the risk for a few localized snow
squalls Tuesday night into Wednesday. If any occur briefly poor
visibility along with roads quickly becoming snow covered would be
an issue for motorists. In addition...a period of westerly wind gusts
of 40 to 50 mph are possible Wednesday into Wednesday night. This may
result in the need for a wind advisory.

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Monday

 

 

 


 

Monday Night

A 30 percent chance of snow, mainly after 4am. Increasing clouds, with a low around 23. West wind around 5 mph becoming calm.

KE: A 30 percent chance of snow, mainly after 4am. Mostly cloudy, with a low around 21. Calm wind.

 

PB: A 40 percent chance of snow, mainly after 3am. Increasing clouds, with a low around 20. Calm wind.

 


Tuesday

Rain and snow, becoming all rain after noon. High near 38. Northeast wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 90%. New snow accumulation of 1 to 2 inches possible.

KE: Snow before noon, then rain and snow between noon and 2pm, then rain after 2pm. High near 36. East wind around 5 mph becoming southeast in the afternoon. Chance of precipitation is 90%. New snow accumulation of 2 to 4 inches possible.

 

 

PB: Rain and snow before 4pm, then a chance of rain between 4pm and 5pm, then a chance of rain and snow after 5pm. High near 35. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 100%. New snow accumulation of 2 to 4 inches possible.

 

 

 

Tuesday Night

 

A chance of rain and snow before 7pm, then a chance of rain and snow showers between 7pm and 8pm, then a chance of snow after 8pm. Mostly cloudy, with a low around 19. Southwest wind 5 to 10 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

 

 

PB: A 30 percent chance of snow before 11pm. Mostly cloudy, with a low around 17. Southwest wind 5 to 10 mph.

 

 


KE: Rain likely, possibly mixed with snow before 9pm, then a chance of snow. Mostly cloudy, with a low around 19. Southwest wind around 5 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

 

Wednesday

 

Partly sunny, with a high near 27. Breezy, with a west wind 10 to 20 mph, with gusts as high as 35 mph.

PB: Partly sunny, with a high near 25. West wind 10 to 15 mph, with gusts as high as 35 mph.

 


KE: A 30 percent chance of snow before 9am. Mostly cloudy, with a high near 23. West wind 5 to 15 mph, with gusts as high as 30 mph.

 


 

Wednesday Night

Partly cloudy, with a low around 16. West wind around 15 mph, with gusts as high as 30 mph.

PB/KE: Partly cloudy, with a low around 13. West wind around 15 mph, with gusts as high as 30 mph.

 

 

 

Thursday

Sunny, with a high near 27.

PB/KE: Sunny, with a high near 22.

 

 

 

Thursday Night

 

 

 

 

 

Friday

 

 


 

Friday Night

 

 

 

 

 

Saturday

 

 

 


 

Saturday Night

 

 

 

 

Sunday

 

 



 

Sunday Night

 

 

 



Your weekend forecast is always posted on the Thursday morning before the weekend
To see an extended forecast for your zone, look at the Extended Forecast page.  

Links of Interest

America faces one of the worst flu seasons ever - Daily Mail
2017’s Safest Cities in America - See who was #1
See the December 2017 Almanac - RichLefko.com Link
Heartstopping moment fearsome tiger shark swims just feet away from oblivious paddlers - The Sun
Asteroid expected to make closest pass by Earth in over 40 years - CBS News
Russian cosmonauts find mysterious bacteria on the hull of the International Space Station that’s NOT from Earth - The Sun
See the current monthly Rainfall & Snowfall data - RichLefko.com
What was this strange light over Phoenix last night? - The Week
After 30 Years, Alarmists Are Still Predicting A Global Warming ‘Apocalypse’ - Daily Caller
Australia Weather Bureau Caught Tampering With Climate Numbers - Daily Caller
EXCLUSIVE: Study Finds Temperature Adjustments Account For ‘Nearly All Of The Warming’ In Climate Data - Daily Caller
Interested in Apple stuff? iPhones, Macs, etc? See all of my articles at MyMac.com
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Rich's Local Weather Discussion:

12/11 -  6:28 PM: Complex storm system moves east tonight. Low pressure moving east will spawn a secondary low off the coast on Tuesday. This low will track into the Gulf of Maine, but it appears to track close enough to pull milder air in off the ocean. Meanwhile colder Arctic air is just to our north, and New England is in the middle. How far that milder air penetrates inland will determine snowfall amounts. For most of eastern and coastal MA,, this looks like mostly a snow to rain event. Further inland in central and western MA, and Southern NH from Nashua west, this looks like a mixed snow/rain event. If the coastal front with mild air remains more east, we could see upwards of 5" of snow in some locations like Peterborough, NH If it moves inland west, less snow will fall and there will be more mixing. Roads will become very slippery late tonight as snow and mixed precipitation arrive after 3AM. In NW MA area, this could fall as freezing rain. Areas that have snow will see mixing as surface tempos warm, but how far west that warming reaches is not clear. To make matters worse, this storm is follow by an Arctic front which, depending on the timing, may cause a flash freeze Tuesday night. The morning commute looks slippery, unsure about the evening commute. See the updated maps and advisory information above, and check back in the morning. Snowfall estimate maps are in the "Winter Weather Center" panel above.

SYNOPSIS...NH/ME
After a cold night tonight, low pressure will move toward New
England from the west on Tuesday. This will spread snow across
the area to start the day, changing to rain along the coastal
plain. Low pressure moves off to the northeast Tuesday night and
an Arctic cold front pushes east across the region early on
Wednesday. This will put northern New England in the deep freeze
as the temperature will likely stay below freezing into the
weekend. The next significant low pressure system is expected to
track off the New England coast Sunday night into Monday,
bringing another chance of snow.

SHORT TERM /6 AM TUESDAY MORNING THROUGH TUESDAY NIGHT/...
Main Concerns...

**Heavy Snow expected for much of the area by rush hour Tuesday
morning and continuing into the Tuesday afternoon rush hour***

**An Arctic air mass ushers in much colder air by Tuesday
night***

SYNOPSIS...MA
Low pressure in the Ohio Valley will move across New England
Tuesday and northeast of the region Wednesday. It will bring
a mixed bag of weather with snow northwest, a mix to rain
central, and rain southeast late tonight and Tuesday. A shot of
arctic air follows Wednesday and Thursday with a period of
strong winds and bitterly cold wind chills. Another low pressure
system may bring more snow to the region sometime in the
Thursday night to Friday night timeframe, if it tracks close
enough to the coast. Somewhat milder weather will arrive by the
end of the upcoming weekend.

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12/11 - 6:23 AM: Quiet weather today as we are between systems. Partly sunny to mostly cloudy with highs in the low to mid 30s as an arctic front drops south. That will set us up for a snow and mixed precipitation event for Tuesday. Low pressure moving east will spawn a secondary low off the coast on Tuesday. This low will track into the Gulf of Maine, but it appears to track close enough to pull milder air in off the ocean. Meanwhile colder Arctic air is just to our north, and New England is in the middle. How far that milder air penetrates inland will determine snowfall amounts. For most of MA, especially coastal areas, this looks like mostly a snow to rain event. Further inland in central and western MA, and Southern NH from Nashua west, this looks like an almost all snow event. If the coastal front with mild air remains more east, we could see upwards of 8" of snow in some locations like Peterborough, NH If it moves inland west, less snow will fall. Winter storm Watch remains in place this morning but I have updated the snowfall estimate maps in the "Winter Weather Center" panel above. Check back tonight for an important update. Much colder as Arctic front moves in Tuesday night. Another chance for snow Friday. Stay tuned.

SYNOPSIS...NH/ME
A cold front will cross the region today...continuing snow showers in the higher terrain. The cold will settle across the area by tonight...and set the stage for the a wintry storm Tuesday. Precipitation will overspread the area from west to east early Tuesday...mostly starting as snow. Slowly warmer air will work inland from the coast and change precipitation from snow to rain. A narrow band of mixed precipitation is possible between the rain and snow. Across the foothills and mountains precipitation is likely to remain snow for the majority of the event...and up to 6 inches or more is possible. Precipitation will quickly come to an end Tuesday evening from west to east. Behind that much colder air will move into the region and linger through the end of the week.

SYNOPSIS...MA
Mainly dry today after early showers or snow showers. A mixed wintry precipitation event begins early tomorrow morning and continues into tomorrow evening, with many areas changing to all rain. A shot of arctic air follows Wednesday and Thursday with a period of strong winds and bitterly cold wind chills. Another low pressure system may bring more snow to the region sometime in the Thursday night to Friday night timeframe, if it tracks close enough to the coast. Somewhat milder weather will arrive by the end of the upcoming weekend.

LONG TERM /TUESDAY NIGHT THROUGH SUNDAY/...
Highlights...
* Low risk for a few brief snow squalls late Tue night/Wed
* Arctic air Wed into Thu w/strong winds and bitter cold wind chills
* Period of snow possible sometime in the Thu night-Fri night period
* Milder weather by the end of the weekend

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Regional Weather Discussion ...

After some melting earlier Sunday, re-freezing is possible on the roads Sunday evening.
Be careful of slick spots!

Sunday night we're partly cloudy and going back down into the 20s for most of the state, and teens in northern NH. Clouds and some sun on Monday with temps in the 30s. Then late Monday night into Tuesday another storm system moves in with snow. It again is not a big storm, but the timing will be problematic.

The snow will begin falling before dawn for many and through the morning commute time on Tuesday. As the day progresses, it may mix and change to freezing rain in the southeastern part of the state, which would cut down on amounts there. Be ready for slow travel! After that system, some seriously COLD air moves in mid-week. Highs then only in the 20s, but with the wind it will feel like the single digits.

These "discussions" come from the National Weather Service, WMUR TV Manchester NH, or me.

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