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Mailman

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  1. MD 472 graphic

     

    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
  2. 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.
    
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