Western Mass Regional Weather for December 11, 2024

[7:12AM, 12/11/24] FLOOD WATCHES HAVE *EXPANDED* TO INCLUDE THE ENTIRE GREATER WMASS REGION TODAY/TONIGHT… WIND ADVISORIES CONTINUE FOR CENTRAL & EASTERN HAMPSHIRE / HAMPDEN COUNTIES, ALL OF CMASS, AND HARTFORD COUNTY EAST THROUGH NE.CT… POTENT STORM SWEEPS UP THE APPALACHIANS BRINGING RAIN, HEAVY AT TIMES… TEMPS ARE COOL AT FIRST, AND BECOME MILDER LATER AFTERNOON AND EVE… TEMPS WILL HOLD KEY TO WIND IMPACTS… DAMAGING WIND GUSTS WITH THUNDER POSSIBLE 4:30-8:30PM… FLIP TO BERKSHIRE SNOW 9PM-2AM… BLUSTERY, DRY TOMORROW… WATCH FOR BLACK ICE EARLY THURSDAY AM… DAVE’S FINAL LIMITED SUPPLY OF 2025 WEATHER CALENDARS WILL SELL OUT… GRAB 1 OR 2 BEFORE THEY’RE GONE…

I have about one box of Weather Nut weather calendars left:
(Final 2025 edition will sell out, first come first served)
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TABLE OF CONTENTS
* Daily Celestials (Sun/Moon Data)
* Sponsor Note
* Morning Discussion
* TIP: Scroll below for sections, or read all
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YOUR DAILY CELESTIALS
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STAR:
–OUR STAR ROSE AT: 7:09am this morning
–OUR STAR WILL SET AT: 4:18pm this evening
–TOTAL DAYLIGHT TIME: 9 hours and 9 minutes

MOON:
–OUR MOON WILL RISE AT: 1:28pm this afternoon
–MOON RISE DIRECTION: East-Northeast
–OUR MOON WILL SET AT: 3:58am tomorrow morning
–MOON SET DIRECTION: West-Northwest
–MOON PHASE: Waxing Gibbous (80.6%)
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A NOTE FROM OUR SPONSOR
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Dave Hayes The Weather Nut is Sponsored by Individual Community Members, Patrons, and Tandem Bagel Company… No matter the weather, Tandem Bagel is always there for you at several valley locations to make your mornings brighter! With *New Pizza Bagels(!)*, along with bagels baked fresh daily (including Gluten-Free options), house-whipped cream cheese, coffee, and tons of lunch options, Tandem is the perfect quick stop for lunch, breakfast, or a coffee and bagel to go.

You can either 1) visit them in Easthampton, Northampton, Hadley, Florence, and/or West Springfield, 2) hire them to cater your next event, or 3) use their super-streamlined online ordering tool by visiting their website and clicking the “Catering” or “Order Online” links.
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YOUR MORNING DISCUSSION
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Good morning folks, we have a potent storm on the way today, and the first rains have already been arriving. We have a cool dome of air in place, and some icy spots developed no doubt up in northern MA, SVT and SWNH, and there may be a few today with some temps at freezing.

The flow is turning southerly, so temps will come up some, but remnant/old cold is harder to dislodge from the CT River Valley, as I have been saying, so while I expect temps to rise late this afternoon and evening just ahead of the cold front, it probably will remain cool in the 30s and 40s for much of the day across the greater WMass region, and then spike into the 50s south of the Route 2 corridor by early evening just ahead of the cold front.

It is exceedingly complex, trying to determine the timing of milder air, the development of convective thunderstorm lines, old remnant cold and how much energy it will take to dislodge it (or not) and how the cold front interacts with all of it.

The bottom line is that the icing threat should end as the morning wears on well north of Rt. 2, and we’ll continue to see periods of rain, heavy at times this morning.

We may get a slight lull near mid-day, but rain will quickly fill back in during the afternoon, and this is when we will need to watch for milder temps surging in, as potent low level jet streak rips overhead mid afternoon to evening.

If mild temps (in the 50s) get into parts of our region, especially in eastern Hampshire/Hampden Counties, northeast CT and southern CMass, southerly gusts could spike to 35-55mph, possibly even 60mph well east of I-91, resulting in damage and outages.

To be clear, I think see less wind the farther north and west you go, with gusts 20-40mph west of I-91 in CT, MA and VT.

In addition, a fine squall line of convection with potential for thunder continues to be signaled as the cold front presses in from the west. This would likely pass through the region from west to east 4:30-8:30pm, but could even arrive earlier in the Berkshires. Regardless of exact timing, the torrential rainfall associated with this squall line could pull some of those low level jet winds down to the surface as well, also causing isolated pockets of wind damage and outages, again mostly along and east of I-91.

I expect the 2-10pm timeframe to provide the steadiest and heaviest rainfall, a chance for a couple of thunderstorms, and the most likely window of time for strong wind gusts.

Today will feature areas of street flooding, and where there is remnant snow pack combined with heavy rain and milder temps, isolated flash flooding is certainly possible. This may occur in southern VT, southwest NH, northwest MA and north-central MA in the Worcester highlands, so stay alert for those of you who live near “flashy” rivers and streams.

A cold front will be slicing into the Berkshires sometime around 7-9pm, and this will rapidly cool temps, and allow for a brief flip to wet snow there up into southern VT, and a coating to 2” is possible, maybe a bit more in the spine of the southern Greens. Lows will drop into the upper 20s to low 30s, and westerly winds will advect drier air in and gust 20-35mph through Thursday.

Thursday through Saturday are colder with dry weather expected, except for some scattered lake effect snow showers by Thursday afternoon.

Friday will be the coldest of that three day stretch with some folks hanging in the upper 20s, but there will be a lot of 30s for highs during this period with partly to mostly sunny skies, followed by a chance of showers Sunday/Monday and again mid week.

Have a great day, I will update by mid-afternoon and again this evening… also remember that I do still have a limited supply of 2025 weather calendars available, so if you want one or two, please click the secure link below to order…

HAIKU OF THE DAY
Dynamic deluge
Trough sweeps, temps surge, wind whips rain
A tempest is born

“Follow your bliss and the universe will open doors for you where there were only walls.”
― Joseph Campbell

By |2024-12-11T09:17:35-05:00December 11, 2024|Current Forecast|

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