Mailman

Not much of anything here.

Mesoscale Precipitation Discussion 0330
NWS Weather Prediction Center College Park MD
514 PM EDT Sun May 26 2024

Areas affected...PortIons of the Upper OH Valley and the Central
Appalachians

Concerning...Heavy rainfall...Flash flooding possible

Valid 262113Z - 270113Z

SUMMARY...A long-lived QLCS with heavy showers and thunderstorms
will be crossing through portions of the upper OH Valley and the
central Appalachians over the next few hours. Given locally wet
antecedent conditions, the rainfall may be enough to cause some
instances of flash flooding.

DISCUSSION...The latest satellite and radar imagery shows a
long-lived and severe QLCS advancing quickly east through portions
of the upper OH Valley, and this will be reaching into portions of
the central Appalachians over the next couple of hours. The
downstream thermodynamic environment across the central
Appalachians is moderately unstable with MLCAPE values as high as
1000 to 1500 K/kg across areas of eastern OH/southwest PA and much
of WV. However, a stronger pool of instability is noted farther
south over eastern TN involving the broader Cumberland Plateau
region where some MLCAPE values are as high as 2000 to 3000 J/kg.

Rainfall rates with the storms are likely to be highest over areas
of eastern TN and far western NC where the greatest instability
and concerns for more discrete cell-development ahead of the
remaining QLCS will occur over the next few hours. Rainfall rates
here will likely approach or exceed 2"/hour, with some spotty 3 to
4 inch totals possible.

Farther north across much of WV and into eastern OH and especially
southwest PA, the progressive nature of the QLCS will limit
overall storm totals to 1 to 2 inches, but there may be some
rainfall rates of up to 1 inch in as little as 30 minutes as the
initial convective line arrives. The activity should tend to
maintain some convective vigor given the downstream instability
environment, and areas even east of the Appalachians may see
convection survive heading later into the evening hours.

Large areas of the central Appalachians in general are rather
moist, and portions of northern WV, southeast OH and southwest PA
saw heavy rains last evening and overnight which have resulted in
elevated streamflows. Given this and the locally rugged terrain
helping to enhance runoff further, some localized areas of flash
flooding will be possible over the next few hours.

Allegheny County with an EF1.

PUBLIC INFORMATION STATEMENT
National Weather Service PITTSBURGH PA
339 PM EDT Wed May 8 2024

...NWS Damage Survey for May 8th 2024 Findlay Township Tornado Event...

.Findlay Township tornado...

Rating:                 EF1
Estimated Peak Wind:    105 mph
Path Length /statute/:  0.20 miles
Path Width /maximum/:   150 yards
Fatalities:             0
Injuries:               0

Start Date:             05/08/2024
Start Time:             01:49 AM EDT
Start Location:         3 ENE Imperial-Enlow / Allegheny County / PA
Start Lat/Lon:          40.4623 / -80.1968

End Date:               05/08/2024
End Time:               01:50 AM EDT
End Location:           3 ENE Imperial-Enlow / Allegheny County / PA
End Lat/Lon:            40.4607 / -80.1936

Survey Summary:
A storm survey performed by the National Weather Service
confirmed that a brief EF1 tornado, with maximum winds of
105 MPH, occurred near Aten Road in Findlay Township, just west
of I-376.

The tornado touched down north of Aten Road, where a
trailer on blocks in a parking lot was overturned, with some tree
damage nearby. The tornado then progressed southeast, snapping at
least 15-20 trees along the northern side of Aten Road. This area
represented the strongest damage, where the 105 MPH wind was
assigned. 

A nearby outbuilding lost a metal roof in several
pieces. One portion fell on the interstate, while another blew
over the interstate and landed roughly a quarter-mile downwind.
The tornado caused additional tree damage near the Edgeworth
Security and Marriot hotel buildings.  The tornado likely then
lifted, as no other appreciable damage was noted other than the
previously noted roof pieces that were blown downstream.

&&

Not much of anything down this way, either.

Mesoscale Discussion 0472
   NWS Storm Prediction Center Norman OK
   0112 PM CDT Wed Apr 17 2024

   Areas affected...extreme eastern IN...much of OH...and western PA

   Concerning...Tornado Watch 122...

   Valid 171812Z - 171945Z

   The severe weather threat for Tornado Watch 122 continues.

   SUMMARY...Storms moving into northwest OH may intensify the next 1-2
   hours. All severe hazards remain possible across Tornado Watch 122.
   A downstream watch will likely be needed in the next couple of hours
   across eastern OH into western PA.

   DISCUSSION...Convection has slowly intensified into early afternoon
   as storms move into a somewhat more unstable airmass. Stronger
   heating has allowed low-level lapse rates to steepen ahead of the
   line of convection. This will support potential for increasing
   gusts. Furthermore, low-level instability remains quite large, with
   0-3 km MLCAPE greater than 125 J/kg. Regional VWP data shows
   enlarged, and favorably curved low-level hodographs, and low-level
   rotation has been noted in velocity signatures via region radars.
   Further intensification of these cells is expected over the next
   couple hours across northwest into central Ohio. 

   As convection continues eastward, a similar environment is expected
   to extend across parts of eastern OH into western PA. A downstream
   watch will likely be needed by 20z/4pm EDT.

   ..Leitman.. 04/17/2024

Hmmmm. The activity around Canton is dissipating. 

Flash Flood Emergency.

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Pittsburgh PA
707 PM EDT Thu Apr 11 2024

...FLASH FLOOD EMERGENCY FOR OAKDALE AND CORAOPOLIS...

The National Weather Service in Pittsburgh has issued a

* Flash Flood Warning for...
  West Central Allegheny County in southwestern Pennsylvania...
  North Central Washington County in southwestern Pennsylvania...

* Until midnight EDT tonight.

* At 707 PM EDT, local law enforcement reported thunderstorms 
  producing heavy rain across the warned area. Between 2 and 3.5 
  inches of rain have fallen. Additional rainfall amounts of 1 to 2 
  inches are possible in the warned area. Flash flooding is ongoing.

  FLASH FLOOD EMERGENCY for Oakdale and Coraopolis. This is a 
  PARTICULARLY DANGEROUS SITUATION. SEEK HIGHER GROUND NOW!

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Law enforcement reported significant flooding in
           Oakdale.

  IMPACT...This is a PARTICULARLY DANGEROUS SITUATION. SEEK
           HIGHER GROUND NOW! Life threatening flash flooding of
           low water crossings, small creeks and streams, urban
           areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Robinson Township, Cecil-Bishop, Kennedy Township, Coraopolis, 
  Imperial, McDonald, Sturgeon-Noblestown, Oakdale, Glen Osborne, 
  Glenfield, Haysville, North Fayette Township, Enlow, South Fayette 
  Township, Collier Township and Midway.

This includes the Parkway between mile markers 57 and 60. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move to higher ground now! This is an extremely dangerous and 
life-threatening situation. Do not attempt to travel unless you are 
fleeing an area subject to flooding or under an evacuation order.

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Just seems to have been a flood event for the most part.

Shaved moderate risk to the west a bit.  

7 minutes ago, KPITSnow said:

I’d have to think this cloud deck will have to break up rather fast to see any appreciable severe weather. 54 degrees at my house and while I see a break in Ohio it isn’t exactly huge 

It actually looked like it was filling in.

Looking forward to an early spring, honestly.  Snow in March doesn't do much for me.

Made it to 4". 

3.25" and still snowing.

Has really picked up in the last half hour or so.  Probably over 2" now.

Saying there's 1.5" outside might be generous.  Hmph.

Coming down good and proper here.

Places in eastern Ohio already measuring 4".