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NNE Summer Thread


mreaves

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Figured that since we have officially entered summer, NNE should have a summer thread.  Pretty decent start over the weekend.  As far as I am concerned, we can hold this pattern through September.

 

Indeed!

 

I had 4 straight mornings with lows in the 40's and 4 days with highs in the 60's, low 70's. Humidity was very tolerable. If only this could last until October 1.

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What a QPF boundary through S/C  VT and NH.  If it was winter we would be discussing 2-4" or 10-20" of snow!! 

 

June could end up on the wet side up here... MVL is at 2.77" which is a little below normal to date actually.  However they are in a little drier area a few miles north of here.

 

Stowe Village is at 3.69" on the month, and Underhill on the other side of Mansfield is at 4.02".  We could make a run at a 5-6" type month if this pans out around Mansfield. 

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June could end up on the wet side up here... MVL is at 2.77" which is a little below normal to date actually.  However they are in a little drier area a few miles north of here.

 

Stowe Village is at 3.69" on the month, and Underhill on the other side of Mansfield is at 4.02".  We could make a run at a 5-6" type month if this pans out around Mansfield.

 

Your post prompted me to see where things are for the month here in Waterbury, and indeed precipitation has been similar to those, with 3.87” as of yesterday morning.  I’ve got a few years of liquid data now through CoCoRaHS, so I’m starting to look at averages, and based on what I’ve seen, 5-6” wouldn’t be all that unusual – our average June precipitation for the past four years is 7.50”, with nothing below 5.5”.  Perhaps these past several Junes have been extra wet, but thus far, the data for our site suggests that it is a wet month around here.

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Figured that since we have officially entered summer, NNE should have a summer thread.  Pretty decent start over the weekend.  As far as I am concerned, we can hold this pattern through September.

I maintain that we have not yet entered summer in this portion of Vermont.  It is still Spring.  Summer is July 12.  After that it is fall.

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June could end up on the wet side up here... MVL is at 2.77" which is a little below normal to date actually. However they are in a little drier area a few miles north of here.

Stowe Village is at 3.69" on the month, and Underhill on the other side of Mansfield is at 4.02". We could make a run at a 5-6" type month if this pans out around Mansfield.

Bone dry here.

1.03"

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Your post prompted me to see where things are for the month here in Waterbury, and indeed precipitation has been similar to those, with 3.87” as of yesterday morning.  I’ve got a few years of liquid data now through CoCoRaHS, so I’m starting to look at averages, and based on what I’ve seen, 5-6” wouldn’t be all that unusual – our average June precipitation for the past four years is 6.77”, with nothing below 5.5”.  Perhaps these past several Junes have been extra wet, but thus far, the data for our site suggests that it is a wet month around here.

June has been abnormally (IMO) wet since my records began here in 1998, with an avg of 5.59", wettest of any month, even October with its 2005 sluicing, the wettest month I've recorded anywhere (14.09".)  Last June's 8.74" ranks only 5th of 16, with 1998's 12.81" as tops.  Those big 5 Junes (98, 06, 09, 12, 13) total over 49" - if all the other 11 years had zero rain in June, my avg would still be over 3".

 

Currently at 2.71" for this June, and looks like I could finish in the 4-5" range, well below my June avg but still more than the LT would run.  Farmington COOP 121-yr avg for June is 4.14", but for 1981-2010 it's 4.93".  With June 2012 and 2013 totaling 17.78", the wet goes on.

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Yeah I was wondering if we are running a long term surplus in June...but I bet it's still up there on the wettest months of the year. It seems more consistently wet than the other summer months.

I guess I didn't realize what the recent averages are...like 5-7" type stuff.

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Your post prompted me to see where things are for the month here in Waterbury, and indeed precipitation has been similar to those, with 3.87” as of yesterday morning. I’ve got a few years of liquid data now through CoCoRaHS, so I’m starting to look at averages, and based on what I’ve seen, 5-6” wouldn’t be all that unusual – our average June precipitation for the past four years is 6.77”, with nothing below 5.5”. Perhaps these past several Junes have been extra wet, but thus far, the data for our site suggests that it is a wet month around here.

I was just looking through CoCoRAHS data and I'm seeing your last 4 year average as 7.62" which is incredibly moist haha.

11.13" in 2013, then 6.04", 6.47", and 6.85"...or did I mess that up?

Your spot has been a hot bed for June precip...I usually also look at the Underhill and Stowe village sites (CH-4, LM-1) to compare east side with west side of the mountain, and they've been under your amounts, quite considerably at times.

The 5-year Underhill average is 5.38" and for Stowe it's 5.25"...so your doing at least 1-2" better than those two sites. The biggest differences recently have been 2012 when WS-19 had 6.04", while CH-4 had 2.94" and LM-1 had 3.30", so you doubled up those spots that June. Also June 2011 saw Waterbury with 6.47", and Underhill 3.98", and Stowe 4.64".

It's interesting that your location on the Spine axis has been considerably wetter in June lately as opposed to the east and west sides of Mansfield. Rainfall this time of year is convective a lot of the times, but that's a pretty solid trend there favoring the Spine axis as one would assume to be the case. I'm just surprised at the magnitude of the difference over relatively short distances.

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I was just looking through CoCoRAHS data and I'm seeing your last 4 year average as 7.62" which is incredibly moist haha.

 

11.13" in 2013, then 6.04", 6.47", and 6.85"...or did I mess that up?

 

You didn’t mess it up, and I figured out the issue.  In addition to the CoCoRaHS database, I’ve also got my numbers in an Excel spreadsheet for easy access, but you can imagine my surprise when the average you got wasn’t quite the same as mine.  My numbers are 11.13”, 5.54”, 6.47, and 6.85” respectively, so the only discrepancy is 0.50” for that June 2012 number in bold, but I figured out why that’s the case.  I was out of town from June 30th through July 8th, 2012, and therefore had to submit a multi-day CoCoRaHS report when I got back:

 

25JUN14A.jpg

 

It looks like the CoCoRaHS system puts that 0.50” under the first day of the report (June 30), so it falls into June, but when I checked the CoCoRaHS maps from the period to see what went on at the surrounding stations, the precipitation for that stretch really fell from July 2nd through July 5th in bits and pieces.  Thus, that 0.50” from the multi-day report is really July precipitation, so that’s where I put it in my data.  The reason that my average was notably lower than yours was because I see that my Excel spreadsheet is already averaging in this year’s June numbers.  Pulling this June out of the calculation puts the average at 7.50” (vs. the 6.77” I had) , so I’ve changed that in my previous post and it appears as if we’ve now got the correct average – obviously very close to what you got with the extra 0.50” included.

 

Anyway, that’s a lot of water each June, and one has to assume it’s the spine orographics in action, because I think the stochastic nature of convective precipitation would have averaged out after four years.  Presumably that’s the sort of stuff that’s pushing the annual precipitation at our site up into that 55-60” range.  It looks like these past few years may have been on the wet side based on BTV’s data relative to average, so we’ll have to see how the numbers look going forward, but it’s going to take some dry years to really pull those averages down.

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You didn’t mess it up, and I figured out the issue.  In addition to the CoCoRaHS database, I’ve also got my numbers in an Excel spreadsheet for easy access, but you can imagine my surprise when the average you got wasn’t quite the same as mine.  My numbers are 11.13”, 5.54”, 6.47, and 6.85” respectively, so the only discrepancy is 0.50” for that June 2012 number in bold, but I figured out why that’s the case.  I was out of town from June 30th through July 8th, 2012, and therefore had to submit a multi-day CoCoRaHS report when I got back:

 

Anyway, that’s a lot of water each June, and one has to assume it’s the spine orographics in action, because I think the stochastic nature of convective precipitation would have averaged out after four years.  Presumably that’s the sort of stuff that’s pushing the annual precipitation at our site up into that 55-60” range.  It looks like these past few years may have been on the wet side based on BTV’s data relative to average, so we’ll have to see how the numbers look going forward, but it’s going to take some dry years to really pull those averages down.

 

Ahh thanks for the clarification...makes sense where that extra half inch comes from. 

 

The only reason why I'm hesitant to say the difference is all orographics is that the past four years have seen a solid 2" difference between your spot and the other two I look at to sort of get a picture of our area (I just find those three sites the most reliably reported, without missing data and all that stuff). That seems a bit higher than it should be for a single month difference, as June would make up for roughly 50% of the annual precipitation difference in the 4-year averages. 

 

CoCoRAHS calculates the last 4-years worth of precip as an average of: 51.15" at LM-1, 53.54" at CH-4, and 55.22" at WS-19 (although, in 2010, this is missing about 3 weeks of precipitation  in January at WS-19 so I'm not sure how much that alters things).  The June difference makes up for the entire season's worth of difference between CH-4 and WS-19.

 

Those annual numbers to me make sense and are probably a pretty good representation of how things play out...with the station on the Spine axis receiving the most precip, then the west slope, then the east slope...although the differences in terms of percentages are fairly low (5-10% difference in annual precip).   I would be surprised though if the long term average in June rainfall would create such a large nearly 2" difference between WS-19 and CH-4, LM-1, but may that month is the month that really bumps the Spine up in annual precip.

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The super-res velocity image looks like it has a weak couplet right over CON right now.  Hopefully they are enjoying it.

Yup, for at least few seconds I saw what appeared to be small rotation elevated and mostly horizontal

by the time I came back with my camera, gone

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No surprise

 

BULLETIN - EAS ACTIVATION REQUESTED

SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAY ME
419 PM EDT WED JUN 25 2014
 
THE NATIONAL WEATHER SERVICE IN GRAY MAINE HAS ISSUED A
 
* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN BELKNAP COUNTY IN CENTRAL NEW HAMPSHIRE...
  WESTERN STRAFFORD COUNTY IN CENTRAL NEW HAMPSHIRE...
  EASTERN MERRIMACK COUNTY IN CENTRAL NEW HAMPSHIRE...
  NORTHERN ROCKINGHAM COUNTY IN SOUTHERN NEW HAMPSHIRE...
 
* UNTIL 500 PM EDT...
 
* AT 413 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL.  THIS
  STORM WAS LOCATED NEAR LOUDON...OR NEAR CONCORD...AND MOVING EAST
  AT 25 MPH.
 
* SOME LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO
  EPSOM...BARNSTEAD AND BARRINGTON.
 
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I was hoping for better rain rates under these orange pixels.

 

.18"/hr is boring.

Yeah, since it started raining about an hour ago have gotten .20" or so.

 

Got a call out of the blue this morning from WMUR's Met Kevin Scarupa.  They have noticed my webcam on Weather Underground and want to start featuring NH webcam views on the WX segment.  He wanted my permission to use it from time to time.  Of course I said sure!

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