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May 23rd Severe Event


NJwx85
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29 minutes ago, NJwx85 said:

Broad rotation on radar for the cell just North of DC.

Tornado Warning
DCC001-MDC033-VAC013-510-232015-
/O.NEW.KLWX.TO.W.0019.190523T1947Z-190523T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Baltimore MD/Washington DC
347 PM EDT Thu May 23 2019

The National Weather Service in Sterling Virginia has issued a

* Tornado Warning for...
  The District of Columbia...
  West central Prince Georges County in central Maryland...
  Southeastern Arlington County in northern Virginia...
  The north central City of Alexandria in northern Virginia...

* Until 415 PM EDT.

* At 346 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over US Capitol, or over Nationals Park, moving east at
  40 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...For those in the direct path of a tornado touchdown,
           flying debris will be dangerous to those caught without
           shelter. Damage to roofs, siding, and windows may occur.
           Mobile homes may be damaged or destroyed. Tree damage is
           likely.

* This dangerous storm will be near...
  Coral Hills and Bladensburg around 350 PM EDT.

Other locations impacted by this tornadic thunderstorm include Rock
Creek, Suitland-Silver Hill, Brentwood, The Mall, Catholic
University, National Arboretum, Chillum, North Brentwood, National
Zoo and Bolling Air Force.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.
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3 minutes ago, NJwx85 said:

Tornado Warning
DCC001-MDC033-VAC013-510-232015-
/O.NEW.KLWX.TO.W.0019.190523T1947Z-190523T2015Z/

BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Baltimore MD/Washington DC
347 PM EDT Thu May 23 2019

The National Weather Service in Sterling Virginia has issued a

* Tornado Warning for...
  The District of Columbia...
  West central Prince Georges County in central Maryland...
  Southeastern Arlington County in northern Virginia...
  The north central City of Alexandria in northern Virginia...

* Until 415 PM EDT.

* At 346 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over US Capitol, or over Nationals Park, moving east at
  40 mph.

  HAZARD...Tornado.

  SOURCE...Radar indicated rotation.

  IMPACT...For those in the direct path of a tornado touchdown,
           flying debris will be dangerous to those caught without
           shelter. Damage to roofs, siding, and windows may occur.
           Mobile homes may be damaged or destroyed. Tree damage is
           likely.

* This dangerous storm will be near...
  Coral Hills and Bladensburg around 350 PM EDT.

Other locations impacted by this tornadic thunderstorm include Rock
Creek, Suitland-Silver Hill, Brentwood, The Mall, Catholic
University, National Arboretum, Chillum, North Brentwood, National
Zoo and Bolling Air Force.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

Tornado Warning for DC? That's not something you see everyday.

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53 minutes ago, NJwx85 said:

Cannot post the loop because my server is down but HRRR shows next threat develops over Northern PA around 00z and clears the coast around 03-04z. Looks multi-cellular in nature.

20z HRRR has a quick moving cluster of storms that would cross parts of the area around 10pm.

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New development showing up in PA ahead of the cold front (still N of BUF)....note the ACCAS streaming in just NW of this, which is often a harbinger of convective initiation. WV loops show fairly significant subsidence behind the first round, but it doesn't look to last long. The 18Z 3k NAM is probably a bit hot, but it seems to be picking up on this. I think at least a few severe storms are in store for PA tonight. Can't rule out something isolated making it to the city overnight.

2216Z.thumb.png.89f9ef191cdd5273e13df86efb0a74a7.png

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1 hour ago, purduewx80 said:

New development showing up in PA ahead of the cold front (still N of BUF)....note the ACCAS streaming in just NW of this, which is often a harbinger of convective initiation. WV loops show fairly significant subsidence behind the first round, but it doesn't look to last long. The 18Z 3k NAM is probably a bit hot, but it seems to be picking up on this. I think at least a few severe storms are in store for PA tonight. Can't rule out something isolated making it to the city overnight.

2216Z.thumb.png.89f9ef191cdd5273e13df86efb0a74a7.png

D7SaXv_UEAIVEVN.jpg

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Mesoscale Discussion 0762
   NWS Storm Prediction Center Norman OK
   0824 PM CDT Thu May 23 2019

   Areas affected...Parts of Upstate New York...central and eastern
   Pennsylvania...northwest New Jersey.

   Concerning...Severe Thunderstorm Watch 225...

   Valid 240124Z - 240330Z

   The severe weather threat for Severe Thunderstorm Watch 225
   continues.

   SUMMARY...Isolated severe storms continue across parts of the
   northeast. While a threat for isolated severe hail/damaging wind
   gusts and a brief tornado persists in the near term, nocturnal
   stabilization is expected to limit the temporal extent of the severe
   threat.

   DISCUSSION...Multicellular clusters and occasional supercell
   structures have been observed across portions of eastern Upstate New
   York into central Pennsylvania over the past few hours, a few of
   which having a history of isolated damaging wind gusts. In addition,
   KCCX radar data has suggested that a few storms across south-central
   Pennsylvania may have produced severe hail, evident with MESH
   thresholds exceeding 1-2 inches in some cases. The boundary layer
   remains relatively warm and marginally unstable, particularly across
   central Pennsylvania, where the greatest potential for severe wind
   gusts/large hail exists in the short term. Kinematic fields also
   remain favorable to support short term threats of large hail,
   damaging wind gusts, and perhaps a brief tornado (particularly with
   the south-central Pennsylvania storms). However, nocturnal cooling
   will stratify the boundary layer, increasing inhibition and
   weakening storms within a few hours.
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Cell near the Poconos is tornado warned again. Wonder if it can make it to the city.

* Tornado Warning for...
  Northeastern Carbon County in northeastern Pennsylvania...
  Southwestern Monroe County in northeastern Pennsylvania...

* Until 1015 PM EDT.
    
* At 950 PM EDT, a severe thunderstorm capable of producing a tornado
  was located over Meckesville, or 11 miles southwest of Mount
  Pocono, moving east at 60 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Radar indicated rotation.

 

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