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Summer 2015 General Thunderstorm Thread


powderfreak

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Well this kind of sucks.  It's pouring and my station is reporting a rate of 0"/hour.  A bad time for it to fritz out--or maybe it's being recorded on the monitor and  just not transmitted to wunderground for some reason.  I'll need to do some investigating.

 

2.42" was recorded.

Up to 2.95" here now so you must be close to that also.

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Buy one of the Stratus Rain Gauges as a backup (the CoCoRAHS recommended ones).   They are like $30 or so I think when I bought mine.  You'll have it for years and years.

 

Good idea--thanks.

 

Bring a toothpick outside and do a bird poop check. Usually that isn't a problem during rain, but if you had a lull maybe it was dry enough for a clogging.

 

Another good idea--thanks.

 

Up to 2.95" here now so you must be close to that also.

 

I had figured we were closing in on 3".  Still raining lightly but it looks like it's about to pull out of here.  Maybe some more showers later on though.

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Well the AM look has somewhat of an interesting appeal to it.  The front is just off to our west and out ahead of it sfc winds are pretty much all out of the SE...even an ESE I think I saw out on the Cape.  Thanks to a very rich presence of low-level moisture, despite the lack of heating, instability values aren't too shabby.  Shear certainly won't be an issue with nearly 40-45 knots of 0-6km shear and near 40 knots of effective bulk shear.  Satellite does suggest we could see some breaks across the region as well.  With minimal capping though and lift close by activity could develop at any time

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Man watching the lightning data that area of storms moving up the VT/NH border area is producing near continuous strikes.  Every couple seconds another several strikes show up.  Even heard a low rumble or two all the way out here.  Someone is getting a real good light show.

 

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Looks promising, some rumbles.

post-1816-0-25456900-1440521049_thumb.pn

 

 

BULLETIN - IMMEDIATE BROADCAST REQUESTED

SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE GRAY ME
1240 PM EDT TUE AUG 25 2015
 
THE NATIONAL WEATHER SERVICE IN GRAY MAINE HAS ISSUED A
 
* SEVERE THUNDERSTORM WARNING FOR...
  NORTHEASTERN HILLSBOROUGH COUNTY IN SOUTHERN NEW HAMPSHIRE...
  SOUTHEASTERN MERRIMACK COUNTY IN CENTRAL NEW HAMPSHIRE...
 
* UNTIL 130 PM EDT
 
* AT 1240 PM EDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
  CAPABLE OF PRODUCING QUARTER SIZE HAIL AND DAMAGING WINDS IN EXCESS
  OF 60 MPH. THIS STORM WAS LOCATED NEAR WEARE...OR 11 MILES
  SOUTHEAST OF HENNIKER...AND MOVING NORTHEAST AT 25 MPH.
 
* LOCATIONS IMPACTED INCLUDE...
  MANCHESTER...CONCORD...HENNIKER...BEDFORD...HOOKSETT...HOPKINTON...
  NEW BOSTON...LOUDON...EPSOM...MONT VERNON...CANTERBURY...
  LYNDEBOROUGH...FRANCESTOWN...GOFFSTOWN...WEARE...DEERING...MOUNT
  VERNON...BOW...ALLENSTOWN AND BOSCAWEN.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS...DESTRUCTIVE HAIL...
DEADLY LIGHTNING AND VERY HEAVY RAIN. FOR YOUR PROTECTION...MOVE TO
AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY
RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER
COVERS THE ROAD.
 
TORRENTIAL RAINFALL IS ALSO OCCURRING WITH THIS STORM...AND MAY LEAD
TO FLASH FLOODING. DO NOT DRIVE YOUR VEHICLE THROUGH FLOODED
ROADWAYS.
 
&&

 

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effective SRH is 100 for much of cT/MA into NH.  If something substantial can get going there is a ton of shear to tap into.  

 

The dry air just above 700 hpa is brutal. These showers are really struggling to grow through that really dry layer. 

 

Entrainment fail. 

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