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June 2012 Severe Weather/Convection Discussion


earthlight

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As we near the end of the first week of June, severe weather season has been relatively quiet across most of the area. However, we're beginning to enter some of the more active months. Although there is nothing on the immediate horizon, we can use this thread to discuss potential upcoming events throughout the month.

The SREF has been pegging Thursday afternoon with some modest 3-hr severe weather probabilities for a few runs now. There seems to be a narrow instability axis (surface and elevated) around 18-21z, but very poor bulk/effective shear parameters. Forecast models are in agreement on a shortwave rotating through the area in response to the upper air system in the afternoon and evening.

SREF_03HR_SVR_PROBS__f051.gif

Looking ahead to the long range, the next potential event in the Northeast could occur around the middle of next week. Forecast models are in decent agreement on a ridge axis building into the Eastern 1/3 of the US with 15-20 C 850 temps advecting towards the area by Monday and Tuesday. At the same time, a very aggressive mid-level shortwave will traverse through Central Canada and then lift north and east. The upper level low will stay far away from the area, but the mid level height falls are indicative of some potential, especially off to our west. The forecast models have been trending away from the more aggressive height falls, and the event is still a long ways out, but it's worth watching over the next several days.

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It looks like the mid level lapse rates will be steep enough today for some thunderstorms to drop

down across the area with the afternoon heating. The storms look to be very slow moving in a

weak shear environment. Locally heavy rains may occur with these storms.

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BULLETIN - EAS ACTIVATION REQUESTED

SEVERE THUNDERSTORM WARNING

NATIONAL WEATHER SERVICE NEW YORK NY

743 PM EDT WED JUN 6 2012

THE NATIONAL WEATHER SERVICE IN UPTON NY HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  QUEENS COUNTY IN SOUTHEAST NEW YORK...

  SOUTHEASTERN UNION COUNTY IN NORTHEAST NEW JERSEY...

  NEW YORK (MANHATTAN) COUNTY IN SOUTHEAST NEW YORK...

  SOUTHEASTERN ESSEX COUNTY IN NORTHEAST NEW JERSEY...

  RICHMOND (STATEN ISLAND) COUNTY IN SOUTHEAST NEW YORK...

  HUDSON COUNTY IN NORTHEAST NEW JERSEY...

  KINGS (BROOKLYN) COUNTY IN SOUTHEAST NEW YORK...

* UNTIL 830 PM EDT...

* AT 738 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 

SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS  

STORM WAS LOCATED NEAR ELIZABETH...AND MOVING SOUTHEAST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PORT

  RICHMOND...BAYONNE...JERSEY CITY...HOBOKEN...TODT HILL...SOHO...

  TOMPKINSVILLE...BATTERY PARK...OAKWOOD...LOWER EAST SIDE...

  VERRAZANO-NARROWS BRIDGE...BROOKLYN HEIGHTS...PARK SLOPE...BAY

  RIDGE...BENSONHURST...CROWN HEIGHTS...FLATBUSH...CONEY ISLAND...

  SHEEPSHEAD BAY...CANARSIE...HOWARD BEACH AND ROCKAWAY BEACH

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE

IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD

TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...

PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.

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The SPC WRF interestingly nailed down individual cells in some of the recent storm outbreaks, I don't remember exact dates though.

Yeah, I know it had the hail producing cell in Western NJ on Sunday and another warned cell I think last

week that moved out of the Bronx and Westchester into the Sound.

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I enjoy how i sound no where near 17 and the hail, when I went outside was about pea size so I was ecstatic and I absolutely love thunderstorms and hail, too bad it wasn't at night because I love night lightning.

I'm 52 and I have the same excitement when there is a big storm.
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The SPC has placed parts of Pennsylvania and New Jersey in a 5% risk for hail today

...PA/WV/MD...

MID/UPPER LEVEL CYCLONIC FLOW REMAINS OVER THE NORTHEAST STATES

TODAY...WITH A WEAK SHORTWAVE TROUGH MOVING SOUTHWARD ACROSS

ONTARIO/LOWER MI. LIFT AHEAD OF THIS FEATURE WILL HELP TO INITIATE

SCATTERED THUNDERSTORMS BY EARLY AFTERNOON OVER PARTS OF PA. COOL

TEMPERATURES ALOFT /-18 AT 500MB/ WILL PROMOTE A RISK OF HAIL IN THE

STRONGER STORMS. ACTIVITY WILL SAG SOUTHWARD INTO MD/WV/VA DURING

THE AFTERNOON AND EARLY EVENING BEFORE DIURNAL COOLING WEAKENS THE

STORMS.

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