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IDA remnants OBS-nowcasts (storm total rain and/or unusual flooding, wind damage-power outage, gusts ~45+ MPH) Wed-Thu morning Sept 1-2, 2021


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4 minutes ago, Neblizzard said:

Forky is right about the UKMET.   We’re in for an assault the next 6-8 hours 

It does appear based off current radar maybe the last 2 runs of the HRRR are too dry or NW with the low for places like NYC and Long Island but it’s hard to tell just yet 

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7 minutes ago, SnowGoose69 said:

It does appear based off current radar maybe the last 2 runs of the HRRR are too dry or NW with the low for places like NYC and Long Island but it’s hard to tell just yet 

no it's not

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CAMS like the HREF are doing a great job on how rapidly the convection would fill in ahead of Ida this evening.


8E87C9D9-010E-4BE1-B916-85ACCA83A493.thumb.jpeg.67018dedb875e94e9fd7c852f338fe44.jpeg

 

26FB7FED-DA68-4F8C-A7D6-A07B7E2A8D72.thumb.jpeg.6f230c266b797259d3ebf2480d24a014.jpeg
 

The HREF was the only  model to indicate that this would go 10”+ in the wettest spots.

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PDS Tornado Warning for north of Philly

 

Severe Weather Statement
National Weather Service Mount Holly NJ
541 PM EDT Wed Sep 1 2021

NJC021-PAC017-091-012200-
/O.CON.KPHI.TO.W.0040.000000T0000Z-210901T2200Z/
Mercer NJ-Montgomery PA-Bucks PA-
541 PM EDT Wed Sep 1 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM EDT FOR
SOUTHWESTERN MERCER...EAST CENTRAL MONTGOMERY AND CENTRAL BUCKS
COUNTIES...

At 541 PM EDT, a confirmed large and extremely dangerous tornado was
located over Willow Grove, or 10 miles north of Philadelphia, moving
northeast at 45 mph.

This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

HAZARD...Damaging tornado.

SOURCE...Radar confirmed tornado.

IMPACT...You are in a life-threatening situation. Flying debris may
         be deadly to those caught without shelter. Mobile homes
         will be destroyed. Considerable damage to homes,
         businesses, and vehicles is likely and complete destruction
         is possible.

Locations impacted include...
Trenton, Ewing, Doylestown, Hatboro, Ambler, Chalfont, Yardley,
Newtown, Abington, Bryn Athyn, Ivyland, Willow Grove, Woodside,
Richboro, Gardenville, Horsham, New Britain, Churchville, Fort
Washington and Blue Bell.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 337 and 348.
 Interstate 295 in New Jersey near mile marker 76.
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Just now, Superstorm said:


And it touched down


.

I posted the debris ball

 

NJC021-PAC017-091-012200-
/O.CON.KPHI.TO.W.0040.000000T0000Z-210901T2200Z/
Mercer NJ-Montgomery PA-Bucks PA-
541 PM EDT Wed Sep 1 2021

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 600 PM EDT FOR
SOUTHWESTERN MERCER...EAST CENTRAL MONTGOMERY AND CENTRAL BUCKS
COUNTIES...

At 541 PM EDT, a confirmed large and extremely dangerous tornado was
located over Willow Grove, or 10 miles north of Philadelphia, moving
northeast at 45 mph.

This is a PARTICULARLY DANGEROUS SITUATION. TAKE COVER NOW!

HAZARD...Damaging tornado.

SOURCE...Radar confirmed tornado.

IMPACT...You are in a life-threatening situation. Flying debris may
         be deadly to those caught without shelter. Mobile homes
         will be destroyed. Considerable damage to homes,
         businesses, and vehicles is likely and complete destruction
         is possible.

Locations impacted include...
Trenton, Ewing, Doylestown, Hatboro, Ambler, Chalfont, Yardley,
Newtown, Abington, Bryn Athyn, Ivyland, Willow Grove, Woodside,
Richboro, Gardenville, Horsham, New Britain, Churchville, Fort
Washington and Blue Bell.

This includes the following highways...
 Pennsylvania Turnpike between mile markers 337 and 348.
 Interstate 295 in New Jersey near mile marker 76.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

To repeat, a large, extremely dangerous and potentially deadly
tornado is occurring. To protect your life, TAKE COVER NOW! Move to a
basement or an interior room on the lowest floor of a sturdy
building. Avoid windows. If you are outdoors, in a mobile home, or in
a vehicle, move to the closest substantial shelter and protect
yourself from flying debris.

Heavy rainfall may hide this tornado. Do not wait to see or hear the
tornado. TAKE COVER NOW!
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