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September 2017 Observation & Discussion Thread


dmillz25

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2 hours ago, doncat said:

While everyone is watching Irma, its a warm humid day here today...Temp up to 85 with a 70 dp...Looks like a good soaking with cold front and wave... 1-2 inches looks likely, mainly later tonight thru tomorrow night.

Yeah even a watch issued for western parts of the area. Some storms popping up out ahead of the main line

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1 hour ago, Tatamy said:

Not that there is too much interest but that line of showers and a few storms is not as impressive as it looks on radar.  Have had a couple of downpours with multiple severe warnings however have probably not heard more than a dozen claps of thunder with it.

I'll corroborate this with the caveat that the gust front was a MONSTER.  It came in about 60+ MPH and I thought all hell was about to break loose.  Like nothing happened for 20 minutes and now it's lightly raining.  Hmm.

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Hudson-Eastern Union-Eastern Essex-Western Bergen-Eastern
Bergen-Eastern Passaic-Rockland-Northern Nassau-Kings
(Brooklyn)-Northern Queens-Southern Queens-Southern
Westchester-Bronx-New York (Manhattan)-Richmond (Staten Is.)-Northern
Westchester-
749 PM EDT TUE SEP 5 2017

...A STRONG GUST FRONT WILL AFFECT HUDSON...BERGEN...SOUTHEASTERN
ESSEX...SOUTHERN WESTCHESTER...QUEENS...RICHMOND...BRONX...NEW
YORK...KINGS AND ROCKLAND COUNTIES...

At 747 PM EDT, radar indicated a strong gust front located along a
line extending from near Pearl River to near Oakwood. Movement was
east at 30 mph.

Wind gusts up to 50 mph are likely, as well as trailing heavy
showers and embeddede thunderstorms.

The gust front will be near...  Nanuet and Pearl River around 755 PM
EDT. Tappan and Norwood around 800 PM EDT.   Coney Island and Nyack
around 805 PM EDT.   Yonkers and Tarrytown around 810 PM EDT. White
Plains and Scarsdale around 820 PM EDT.   Rockaway Beach and
Harrison around 825 PM EDT.   Port Chester and Rye around 830 P
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4 minutes ago, Cfa said:

Very dark in Lake Grove right now, but that strong cell over the ocean looks to slide to the east of here and impact eastern LI. So unfair.

I can hear the thunder from that severe cell to my SE. The doppler velocities are as impressive as I have seen for South of Long Island.

..A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 900 AM EDT...

FOR THE FOLLOWING AREAS...
FIRE ISLAND INLET NY TO MORICHES INLET NY OUT 20 NM...
SANDY HOOK NJ TO FIRE ISLAND INLET NY OUT 20 NM...
WATERS FROM FIRE ISLAND INLET NY TO MORICHES INLET NY FROM 20 TO 40
NM...
WATERS FROM SANDY HOOK NJ TO FIRE ISLAND INLET OUT 20 TO 40 NM...

AT 832 AM EDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING
WATERSPOUTS WAS LOCATED 12 NM SOUTHEAST OF GREAT SOUTH BAY...MOVING
NORTHEAST AT 65 KNOTS.

HAZARD...WATERSPOUTS AND WIND GUSTS 34 KNOTS OR GREATER.

SOURCE...RADAR INDICATED.

IMPACT...WATERSPOUTS CAN EASILY OVERTURN BOATS AND CREATE LOCALLY
         HAZARDOUS SEAS. SMALL CRAFT COULD BE DAMAGED IN BRIEFLY
         HIGHER WINDS AND SUDDENLY HIGHER WAVES.

LOCATIONS IMPACTED INCLUDE...
BUOY 44025.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

 

WUNIDS_map.gif.7e40a83f1ea103111aa2f276ac1e7428.gif

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10 minutes ago, bluewave said:

I can hear the thunder from that severe cell to my SE. The doppler velocities are as impressive as I have seen for South of Long Island.


..A SPECIAL MARINE WARNING REMAINS IN EFFECT UNTIL 900 AM EDT...

FOR THE FOLLOWING AREAS...
FIRE ISLAND INLET NY TO MORICHES INLET NY OUT 20 NM...
SANDY HOOK NJ TO FIRE ISLAND INLET NY OUT 20 NM...
WATERS FROM FIRE ISLAND INLET NY TO MORICHES INLET NY FROM 20 TO 40
NM...
WATERS FROM SANDY HOOK NJ TO FIRE ISLAND INLET OUT 20 TO 40 NM...

AT 832 AM EDT...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING
WATERSPOUTS WAS LOCATED 12 NM SOUTHEAST OF GREAT SOUTH BAY...MOVING
NORTHEAST AT 65 KNOTS.

Yeah, 75mph, possibly 80mph, is the highest storm velocity I've seen around here, this thing is moving quickly. It's a good thing such forward motion in thunderstoms doesn't have as much of an affect on the surface winds, unlike hurricanes.

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3 hours ago, Cfa said:

Yeah, 75mph, possibly 80mph, is the highest storm velocity I've seen around here, this thing is moving quickly. It's a good thing such forward motion in thunderstoms doesn't have as much of an affect on the surface winds, unlike hurricanes.

Wind damage reported as that cell crossed Suffolk.

 

0930 AM     TSTM WND DMG     ORIENT                  41.14N  72.30W
09/06/2017                   SUFFOLK            NY   CO-OP OBSERVER

            TREE DOWN ON OLD MAIN ROAD
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48 minutes ago, doncat said:

63 here currently, quite a change from yesterdays 87 degrees...Also nowhere near the forecast high in the mid 70's. Looks like the midnight 70 degree reading will be my high.

I actually kicked on the AC last night, it was pretty warm and humid.  As for today, it's currently 60° and cloudy.  August to October in one day.

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