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Western PA/Pittsburgh Summer Discussion 2021


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 Mesoscale Discussion 0944
   NWS Storm Prediction Center Norman OK
   1113 AM CDT Sun Jun 13 2021

   Areas affected...portions of far southeast Ohio...southwest
   Pennsylvania into northern West Virginia and northwest Virginia

   Concerning...Severe potential...Watch possible 

   Valid 131613Z - 131815Z

   Probability of Watch Issuance...60 percent

   SUMMARY...The severe potential is increasing across portions of the
   Mid Atlantic. Damaging winds are the primary threat. A Severe
   Thunderstorm Watch may be needed if storms continue to intensify and
   increase in coverage.

   DISCUSSION...Multicellular clusters have recently experienced an
   uptick along the southwest flank of an ongoing MCS, on the leading
   edge of the cold pool. The MCS is propagating southward towards 80+
   F surface temperatures, with upper 60s to 70 F dewpoints
   contributing to 1000+ J/kg MLCAPE. Though only 25 kts of effective
   bulk shear are in place, and mid-level lapse rates are generally
   under 6 C/km, continued surface heating with the rich moisture in
   place is expected to support robust storm development into early
   afternoon, both ahead of the MCS cold pool and along the cold front.
   Wet downbursts and merging cold pools may support at least a few
   damaging gusts with the stronger (albeit shorter lived)
   multicellular clusters. Damaging gust potential may be high enough
   to warrant the issuance of a Severe Thunderstorm Watch over the next
   couple of hours.

   ..Squitieri/Grams.. 06/13/2021
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SEL4

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 264
   NWS Storm Prediction Center Norman OK
   1250 PM EDT Sun Jun 13 2021

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Far northeast Kentucky
     Eastern to southern Ohio
     Western Pennsylvania
     West Virginia

   * Effective this Sunday afternoon and evening from 1250 PM until
     700 PM EDT.

   * Primary threats include...
     Scattered damaging wind gusts to 70 mph possible
     Isolated large hail events to 1.5 inches in diameter possible

   SUMMARY...Several multicell clusters may develop and spread
   southeast through the afternoon with a primary risk of damaging
   winds.

   The severe thunderstorm watch area is approximately along and 75
   statute miles east and west of a line from 50 miles south of Athens
   OH to 25 miles north northeast of Franklin PA. For a complete
   depiction of the watch see the associated watch outline update
   (WOUS64 KWNS WOU4).

   PRECAUTIONARY/PREPAREDNESS ACTIONS...

   REMEMBER...A Severe Thunderstorm Watch means conditions are
   favorable for severe thunderstorms in and close to the watch area.
   Persons in these areas should be on the lookout for threatening
   weather conditions and listen for later statements and possible
   warnings. Severe thunderstorms can and occasionally do produce
   tornadoes.

   &&

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
   few cumulonimbi with maximum tops to 550. Mean storm motion vector
   32025.

   ...Grams

 

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Severe Thunderstorm Warning

Severe Thunderstorm Warning
PAC003-125-129-132245-
/O.NEW.KPBZ.SV.W.0029.210613T2159Z-210613T2245Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Pittsburgh PA
559 PM EDT Sun Jun 13 2021

The National Weather Service in Pittsburgh has issued a

* Severe Thunderstorm Warning for...
  East central Washington County in southwestern Pennsylvania...
  Eastern Allegheny County in southwestern Pennsylvania...
  West central Westmoreland County in southwestern Pennsylvania...

* Until 645 PM EDT.

* At 558 PM EDT, a severe thunderstorm was located over Etna, or near
  Ross Township, moving southeast at 25 mph.

  HAZARD...Wind gusts to 60 mph and quarter-size hail.

  SOURCE...Radar.

  IMPACT...Minor hail damage to vehicles is possible. Expect wind
           damage to trees and power lines, resulting in some power
           outages.

* Locations impacted include...
  Pittsburgh...                     Penn Hills...
  Mount Lebanon...                  Bethel Park...
  Ross Township...                  McCandless Township...
  Monroeville...                    McKeesport...
  Franklin Park...                  Gastonville...
  Shaler Township...                Plum...

This includes the following highways...
  Pennsylvania Turnpike between mile markers 39 and 66.
  Interstate 79 in Pennsylvania between mile markers 62 and 65, and
  near mile marker 67.
  Interstate 376 in Pennsylvania between mile markers 65 and 84.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.

Move to an interior room on the lowest floor of a building.

Please report severe weather by calling 412-262-1988, posting to
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH.

&&

LAT...LON 4052 8014 4064 7990 4039 7955 4016 7999
TIME...MOT...LOC 2158Z 326DEG 21KT 4050 7996

HAIL...1.00IN
WIND...60MPH

$$

DS

 

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Flash Flood Warning

Flash Flood Warning
PAC003-129-140045-
/O.EXT.KPBZ.FF.W.0005.000000T0000Z-210614T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pittsburgh PA
749 PM EDT Sun Jun 13 2021

The National Weather Service in Pittsburgh has extended the

* Flash Flood Warning for...
  Southeastern Allegheny County in southwestern Pennsylvania...
  Southwestern Westmoreland County in southwestern Pennsylvania...

* Until 845 PM EDT.

* At 749 PM EDT, Emergency management have reported multiple water
  rescues around Pittsburgh and notably in Pleasant Hills.  The
  warning has been extended to give time for more water to recede.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Emergency management reported.

  IMPACT...Flash flooding of small creeks and streams, urban
           areas, highways, streets and underpasses as well as
           other poor drainage and low-lying areas.

* Some locations that will experience flash flooding include...
  Pittsburgh, Penn Hills, Mount Lebanon, Bethel Park, Monroeville,
  Greensburg, McKeesport, Jeannette, West Mifflin, Baldwin,
  Murrysville, Wilkinsburg, Whitehall, South Park Township, Munhall,
  Jefferson Hills, North Versailles, Brentwood, Swissvale and Castle
  Shannon.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don`t drown when encountering flooded roads. Most flood
deaths occur in vehicles.

Be aware of your surroundings and do not drive on flooded roads.

&&

LAT...LON 4020 7986 4024 7992 4025 7991 4027 7995
      4038 8004 4045 7995 4044 7974 4037 7949
      4013 7976

FLASH FLOOD...OBSERVED

$$

 

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We got hit pretty good here. Luckily my street survived but many neighborhoods around us didn’t. Power just came on. I am guessing a microburst hit. Our winds had to be over 70mph. Trees were uprooted and the ground wasn’t very saturated. Hail was 1 inch diameter. It lasted a good 15 minutes or so. 

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This isn't enjoyable. TimB you bitch about not getting severe storms and how it's gonna miss AGH County but then we get this shit. My powers been out for 4 hours and now most of my food is spoiled. 

As far as the storm goes that had to be a microburst because I've never seen it rain so hard. Not to mention wind gusts were easily over 70 mph. 

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7 minutes ago, Rd9108 said:

This isn't enjoyable. TimB you bitch about not getting severe storms and how it's gonna miss AGH County but then we get this shit. My powers been out for 4 hours and now most of my food is spoiled. 

As far as the storm goes that had to be a microburst because I've never seen it rain so hard. Not to mention wind gusts were easily over 70 mph. 

I was at wildwood country club and there was a whole grove of trees snapped in half. Likely some 100 mph gusts.

 

 And yeah, rooting on severe storms has always rubbed me the wrong way. Many of the issues that go along with winter storms are avoidable (we’ve all seen how idiots drive in snow and ice here) but I can’t avoid a tree on my house or power being out and ruining what is in my refrigerator.

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10 hours ago, Rd9108 said:

This isn't enjoyable. TimB you bitch about not getting severe storms and how it's gonna miss AGH County but then we get this shit. My powers been out for 4 hours and now most of my food is spoiled. 

As far as the storm goes that had to be a microburst because I've never seen it rain so hard. Not to mention wind gusts were easily over 70 mph. 

 

9 hours ago, KPITSnow said:

I was at wildwood country club and there was a whole grove of trees snapped in half. Likely some 100 mph gusts.

 

 And yeah, rooting on severe storms has always rubbed me the wrong way. Many of the issues that go along with winter storms are avoidable (we’ve all seen how idiots drive in snow and ice here) but I can’t avoid a tree on my house or power being out and ruining what is in my refrigerator.

Sorry you lost things as a result of these storms. Not going to apologize for rooting for interesting weather, especially after an incredibly boring spring, but I can empathize with it sometimes being impractical to do so as a homeowner. I wasn’t home when the storms hit, I was out in Mars and did see a good storm with strong but non-severe winds and a lot of lightning (possibly the same storm cell as the one in question?), which as I’ve said before is enough to satisfy me. The power was back on at my house when I got home at 8:30, though it had been out at some point - not sure for how long but obviously not long. But I would guess if a tree fell on my house or I lost everything in my fridge as a result of severe weather, I would be able to return to enjoying a good strong to severe thunderstorm once I got through wrangling with the insurance company to get my house fixed or buying hundreds of dollars of groceries to restock the fridge.

But I have a few questions:

1. Considering my rooting for these storms wasn’t what made them happen, is it fair to be angry at people who enjoy severe weather when you are affected by it?

2. Regular non-severe thunderstorms can also knock the power out and destroy everything in your fridge depending on what the lightning hits. Are those also off-limits to root for? There are people in this thread that like their summers hot. I’m going to go ahead and guess that this storm might have been less severe if the hot weather lovers didn’t get their overperforming high of 87 yesterday. Where do you draw the line?

3. Go read any thread about a severe weather event in the subforums on here that get them frequently. Are all of those people (and there are quite a few of them) sociopaths/monsters?

Sorry for the rant, but it rubs me the wrong way when people make me second guess my enjoyment of severe weather. But the thing is, my conscience says you might be right.

One more thing: I apologize 100% for my premature comment about the Allegheny County split. Clearly that didn’t even close to happen.

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We've been pretty lucky (or unlucky depending on your POV) here locally.  Yesterday was the first storm that actually hit us and it wasn't all that bad.  Most of them have been missing just to the west or east.  Sorry for those of you dealing with problems.  I've seen lots of down trees and flooding elsewhere, including my own old 'hood in Morgantown.

Actually, I've always been curious about this microclimate split we seem to have between north of the city and south.  For whatever reason, it seems south of the city gets much less incidence of true severe.  Does anyone happen to know why?  Is it simple terrain/geography?

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Tim I love severe weather what I don't love is how everyone of your posts is always negative. You posted yesterday that it looks like the storms are gonna split AGH County and you were 100% wrong. That isn't the first time either. 

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44 minutes ago, Rd9108 said:

Tim I love severe weather what I don't love is how everyone of your posts is always negative. You posted yesterday that it looks like the storms are gonna split AGH County and you were 100% wrong. That isn't the first time either. 

Understood, and I’m really trying to dial back the negativity, but I understand that premature bust call yesterday was an egregious violation of that. Outside of that and a lesser comment I made earlier in the week, I don’t think I’ve been particularly bad since the end of our snowless March. Then again, the weather in April and May made me happy even without thunderstorms. The real test will be the next time we face adversity. Not the first time, but I hope it will be the last. I appreciate you calling me out on it, guilty as charged. I’ll work on it.

TL;DR: I apologize for my negativity, but I’ll never apologize for being a severe weather fan.

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Mesoscale Discussion 0964
   NWS Storm Prediction Center Norman OK
   1031 AM CDT Mon Jun 14 2021

   Areas affected...Portions of eastern OH...northern
   WV...western/central PA...and western MD

   Concerning...Severe potential...Severe Thunderstorm Watch likely 

   Valid 141531Z - 141700Z

   Probability of Watch Issuance...80 percent

   SUMMARY...Damaging winds and severe hail may occur as storms
   increase in coverage and intensity this afternoon. Watch issuance is
   likely.

   DISCUSSION...A mid-level shortwave trough over the Great Lakes will
   continue to move southeastward across the Mid-Atlantic this
   afternoon and evening. Large-scale ascent preceding this feature is
   supporting an area of thunderstorms along the shore of Lake Erie and
   into northwestern PA. The airmass across eastern OH into
   western/central PA and vicinity ahead of the front is expected to
   gradually destabilize through the early afternoon as diurnal heating
   continues. The low-level airmass is not overly moist, with recent
   surface observations showing surface dewpoints ranging from the mid
   50s to low 60s. Still, the development of around 1000 J/kg of MLCAPE
   appears probable by peak afternoon heating. Weak low-level winds
   quickly strengthen at mid levels, and 40-50 kt of effective bulk
   shear will support organized updrafts. A mix of supercells and
   multicells along the front should pose a threat for both isolated
   severe hail and scattered damaging winds as convection spreads
   east-southeastward. Watch issuance will likely be needed as storms
   are expected to increase in coverage and intensity through the early
   afternoon.

   ..Gleason/Grams.. 06/14/2021

   ...Please see www.spc.noaa.gov for graphic product...

   ATTN...WFO...CTP...LWX...PBZ...RLX...CLE...

   LAT...LON   40898109 

 

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SEL9

   URGENT - IMMEDIATE BROADCAST REQUESTED
   Severe Thunderstorm Watch Number 269
   NWS Storm Prediction Center Norman OK
   1145 AM EDT Mon Jun 14 2021

   The NWS Storm Prediction Center has issued a

   * Severe Thunderstorm Watch for portions of 
     Eastern Ohio
     Western to central Pennsylvania
     Northern West Virginia

   * Effective this Monday morning and evening from 1145 AM until
     600 PM EDT.

   * Primary threats include...
     Scattered damaging wind gusts to 70 mph possible
     Isolated large hail events to 1.5 inches in diameter possible

   SUMMARY...Initial thunderstorm development over northwest
   Pennsylvania might intensify in the near-term, but more likely
   additional development farther west-southwest should increase in
   coverage and intensity later this afternoon.

   The severe thunderstorm watch area is approximately along and 60
   statute miles north and south of a line from 40 miles west of
   Wheeling WV to 15 miles east of State College PA. For a complete
   depiction of the watch see the associated watch outline update
   (WOUS64 KWNS WOU9).

   PRECAUTIONARY/PREPAREDNESS ACTIONS...

   REMEMBER...A Severe Thunderstorm Watch means conditions are
   favorable for severe thunderstorms in and close to the watch area.
   Persons in these areas should be on the lookout for threatening
   weather conditions and listen for later statements and possible
   warnings. Severe thunderstorms can and occasionally do produce
   tornadoes.

   &&

   AVIATION...A few severe thunderstorms with hail surface and aloft to
   1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A
   few cumulonimbi with maximum tops to 500. Mean storm motion vector
   29035.

   ...Grams

 

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Severe Thunderstorm Warning

Severe Thunderstorm Warning
PAC003-007-125-141900-
/O.NEW.KPBZ.SV.W.0033.210614T1833Z-210614T1900Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Pittsburgh PA
233 PM EDT Mon Jun 14 2021

The National Weather Service in Pittsburgh has issued a

* Severe Thunderstorm Warning for...
  South central Beaver County in western Pennsylvania...
  North central Washington County in southwestern Pennsylvania...
  West central Allegheny County in southwestern Pennsylvania...

* Until 300 PM EDT.

* At 233 PM EDT, a severe thunderstorm was located near Imperial, or
  near Moon Township, moving southeast at 40 mph.

  HAZARD...Wind gusts to 60 mph.

  SOURCE...Radar.

  IMPACT...Expect damage to trees and power lines, resulting in some
           power outages.

* Locations impacted include...
  Pittsburgh...                     Mount Lebanon...
  Bethel Park...                    Moon Township...
  Upper St. Clair...                Scott Township...
  Whitehall...                      Robinson Township...
  Cecil-Bishop...                   Dormont...
  Bellevue...                       Castle Shannon...

This includes the following highways...
  Interstate 79 in Pennsylvania between mile markers 50 and 66.
  Interstate 376 in Pennsylvania between mile markers 48 and 68.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to an interior room on the lowest floor of a building.

Please report severe weather by calling 412-262-1988, posting to
the NWS Pittsburgh Facebook page, or using Twitter @NWSPITTSBURGH.

&&

LAT...LON 4047 8050 4060 8038 4049 8005 4036 8001
      4029 8022
TIME...MOT...LOC 1833Z 294DEG 35KT 4049 8033

HAIL...<.75IN
WIND...60MPH

$$

 

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23 minutes ago, Ahoff said:

Was in Nashville from a few days.  Was hot and sunny in the mid 90s, and come back to severe storms knocking the power out.  Yeah, these kind of storms aren’t worth the excitement.  Looks like I won’t even be able to enjoy my last night before work tomorrow.

I’m wondering if the evening might actually be pretty decent once this round of storms clears our area. Kicked the humidity up a few notches again but might shape up to be a pleasant evening.

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