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Spring/ Summer 2014 Convection Discussion


weatherwiz

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Were you driving T-machine?

Dear lord no, I was navigating with radarscope while my conveniently local grandfather drove. You can hear him at the end of the video exclaiming lightning just happened. Videoing, driving, and tornado chasing (at least attempting to) are dangerous enough alone, and I know I can't juggle!
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NWS will do a survey in Woburn tomorrow to determine what happened. 

 

Here's some local news coverage:

http://www.necn.com/07/07/14/Lots-of-storm-damage-in-Woburn-Mass/landing_weather.html?blockID=868894&feedID=4211

 

 

This is where I was at about 5:45

http://goo.gl/maps/z34TX

 

19m8w3.jpg

 

 

Lots of damage in a concentrated area. Large trees down, power poles & lines, streets blocked and closed. A few blocks away was just fine. 

http://goo.gl/maps/BThWx

2i20och.jpg

 

 

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Who measured these trees?  They must be slant-sticking.  :)

 

From the BOX microburst report:

 

APPROXIMATELY 50 TO 70 TREES WERE BLOWN DOWN. MOST OF THEM WERE
HEALTHY PINE TREES THAT WERE 100 FEET TALL
. THE TREES WERE BLOWN
DOWN...SNAPPED AT LEAST HALF WAY UP...OR UPROOTED. APPROXIMATELY
8 TREES FELL ONTO HOUSES CAUSING SIGNIFICANT DAMAGE. ON HILLTOP
DRIVE AND HEMLOCK LANE ALONE...MORE THAN TWO DOZEN PINE TREES WERE
KNOCKED DOWN.
 

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Watch coming soon

 

80% chance of a watch ;)

MESOSCALE DISCUSSION 1319
   NWS STORM PREDICTION CENTER NORMAN OK
   0445 PM CDT TUE JUL 08 2014

   AREAS AFFECTED...ERN NY...INCLUDING THE NYC METRO...VT...MA...CT

   CONCERNING...SEVERE POTENTIAL...SEVERE THUNDERSTORM WATCH LIKELY 

   VALID 082145Z - 082245Z

   CORRECTED FOR GEOGRAPHIC AREA

    PROBABILITY OF WATCH ISSUANCE...80 PERCENT

   SUMMARY...DAMAGING WIND THREAT WILL EXTEND EAST OF CURRENT SEVERE
   THUNDERSTORM WATCH 403. A NEW WATCH WILL LIKELY BE ISSUED WITHIN THE
   NEXT HOUR OR TWO.

   DISCUSSION...A SEVERE THUNDERSTORM WATCH WILL LIKELY BE NEEDED SOON
   DOWNSTREAM OF WATCH 403 ACROSS ERN NY...INCLUDING THE NYC METRO
   AREA...INTO VT AND PORTIONS OF MA/CT. A VERY SIMILAR AIRMASS EXISTS
   ACROSS THIS AREA...DOWNSTREAM OF EASTWARD ADVANCING BOWING SEGMENTS.
   STRONG BULK SHEAR OF 40-50 KTS ALONG WITH MODEST INSTABILITY AND A
   DEW POINTS IN THE MID 60S TO NEAR 70 DEG F SHOULD MAINTAIN INTENSITY
   AND ORGANIZATION OF THE LINE OF STORMS. ADDITIONALLY...POCKETS OF
   DCAPE GREATER THAN 1000 J/KG WILL FURTHER ENHANCE DAMAGING WIND
   POTENTIAL. A WATCH WILL LIKELY BE NEEDED WITHIN THE NEXT HOUR OR
   TWO.
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To employ a cliche, I'll believe THAT when I see it...

 

I can only vaguely count on one hand, and am tempted to so never, over the last 35 years I have lived in New England, the number of times we had relatively high heat/humidity and severe, on back to back days.  

 

But ... kind of an usual set-up underway so perhaps.  

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