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Summer 2015 General Thunderstorm Thread


powderfreak

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Interesting WV loop showing the SWave diving SE towards the Delmarva, would indicate most of the heavy rain expected on the south coast Se Ma gets pulled OTS

@MichaelPageWx: Just In: Flash Flood Watch (green) for SE New England thru 9 PM. Localized flooding likely; will impact PM drive. http://t.co/LFtUhyytlc

It's Time

post-33-0-69182800-1335129317.jpg

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Oh well, thus blows, no convection...now to await the dewpoint drop

Yeah, not sure if anything pops.  BOX updated at 3pm though.

 

 

 

&&

.NEAR TERM /UNTIL 9 PM THIS EVENING/...

*** FLASH FLOOD WATCH IN EFFECT FROM 1 PM TO 9 PM FOR MUCH OF

SOUTHEAST MASSACHUSETTS...RHODE ISLAND AND NORTHEAST CONNECTICUT ***

3 PM UPDATE...

AT 3 PM BROKEN LINE OF CONVECTION WAS LOCATED FROM CAPE ANN AREA

EXTENDING SOUTHWEST INTO CT. MORE ISOLATED CONVECTION DEVELOPING

SOUTHEAST OF THIS AREA. FRONT HAS SLIPPED JUST SOUTH OF THE REGION

BUT BECOMING MORE DIFFUSED ALONG THE SOUTH COAST AND EAST COAST AS

LOCAL SEABREEZES DEVELOP. THESE SEABREEZE BOUNDARIES WILL LIKELY

PROVIDE A FOCUS FOR NEW AND STRONGER CONVECTION PER LATEST

HRRR/ARW AND NMM.

DESPITE MUCH OF THE REGION IN THE POST FRONTAL AIRMASS DEW PTS

REMAIN IN THE 60S WITH SURFACE TEMPS IN THE LOW TO MID 80S. THIS

IS YIELDING ML CAPES OF AROUND 1000 J/KG ACROSS RI AND SOUTHEAST

MA WITH SBCAPES UP TO 2000 J/KG IN THIS SAME AREA. THUS SUFFICIENT

INSTABILITY TO SUPPORT ROBUST UPDRAFTS. THIS COUPLED WITH COPIOUS

MOISTURE THROUGH THE COLUMN /PWATS ABOUT 1.7" AND DEW PTS U60S TO

L70S/...CONVERGENCE FROM LOCAL SEABREEZE BOUNDARIES AND LIGHT

WINDS ALOFT /SLOW MOVING STORMS/ TO INCREASE THE RISK FOR

TORRENTIAL DOWNPOURS AND LOCALIZED FLASH FLOODING IN THE WATCH

AREA...NORTHEAST CT/RI AND SOUTHEAST MA. ARW/NMM/NAM/HRRR/RGEM ALL

INCREASE AREAL COVERAGE AND INTENSITY OF CONVECTION AROUND 20Z/21Z

AND THEREAFTER TIL ABOUT 00Z. THUS ABOVE AVERAGE CONFIDENCE IN

OUR WATCH. THINKING ALL MODELS ARE FOCUSING/KEYING ON CONVERGING

SOUTH COAST AND EAST COAST SEABREEZE BOUNDARIES OVER SOUTHEAST MA

YIELDING MULTIPLE QPF BULLSEYE IN THIS AREA.

BY 21Z CONVECTION WILL BE SOUTH OF THE MASSACHUSETTS TURNPIKE AND

FOCUSED ACROSS CT/RI AND SOUTHEAST MA. THUS HEAVY RAIN AND

POTENTIAL LOCALIZED FLOODING COULD IMPACT THE LATE DAY COMMUTE

ACROSS RI AND SOUTHEAST MA. BY 00Z- 03Z STORMS WILL WEAKEN

RAPIDLY AND MOVE OFFSHORE. THE HEAVY RAIN COUPLED WITH HIGH DEW PT

AIRMASS MAY RESULT IN PATCHY FOG EARLY THIS EVENING.

&&

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Getting a little excited over Saturday.  Even if it doesn't pan out it's always exciting and thrilling tracking a potential event.

there are at least 2 opportunities for eml advection this weekend into early next week. it will come down to die rolls with s/w's and debris
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there are at least 2 opportunities for eml advection this weekend into early next week. it will come down to die rolls with s/w's and debris

 

Looks like a second possibility sometime around next Tuesday or so.  I'm hoping one of these possibilities will pan out b/c after that the pattern is completely dominated by ridging with all the jet energy located at and north or the border for a period.  

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