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north pgh

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  1.  

     

    Mesoscale Discussion 1974
       NWS Storm Prediction Center Norman OK
       1119 AM CST Sun Nov 27 2022
    
       Areas affected...Upper Ohio Valley
    
       Concerning...Severe potential...Watch unlikely 
    
       Valid 271719Z - 271915Z
    
       Probability of Watch Issuance...20 percent
    
       SUMMARY...Isolated strong/damaging winds will be possible in parts
       of the upper Ohio Valley region this afternoon.
    
       DISCUSSION...Shallow convection has very slowly deepened along the
       cold front in southeast Ohio to near West Virginia border. A small
       region of mid 50s F dewpoints within this region is supporting
       250-500 J/kg MUCAPE. Regional VAD profiles show 40-60 kts of flow
       within the lowest 2 km. Though convection will likely remain shallow
       and produce little lightning, isolated strong/damaging gusts will be
       possible as surface heating continues this afternoon. Within the
       last hour, a gust of 37 kts was observed near Chillicothe, OH and 47
       kts was observed at Huntington, WV. Given the low-level inversions
       present on the 12Z observed ILM/PBZ soundings, low-level lapse rates
       are not expected to become overly steep even with more heating. The
       shallow convection will likely be the primary mechanism for stronger
       gusts this afternoon.
    
       ..Wendt/Hart.. 11/27/2022
    
       ...Please see www.spc.noaa.gov for graphic product...
    
       ATTN...WFO...CTP...LWX...PBZ...RLX...ILN...
    
       LAT...LON   39818266 40428121 40717986 40387904 39897887 38758039
                   38378185 38558251 38808270 39818266 
    
    
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    MD 1974 graphic

  2. Just now, north pgh said:

    MD 1191 graphic

    Mesoscale Discussion 1191
       NWS Storm Prediction Center Norman OK
       0231 PM CDT Thu Jun 16 2022
    
       Areas affected...northeastern Ohio into western Pennsylvania.
    
       Concerning...Severe Thunderstorm Watch 375...
    
       Valid 161931Z - 162100Z
    
       The severe weather threat for Severe Thunderstorm Watch 375
       continues.
    
       SUMMARY...Ongoing storms, will continue eastward with a risk for
       damaging wind gusts and hail. Storms with supercellular
       characteristics are maturing suggesting a localized greater severe
       potential downstream into PA.
    
       DISCUSSION...As of 1915 UTC, regional radar analysis showed
       scattered thunderstorms maturing ahead of a pre frontal trough/lake
       breeze boundary across portions of northeastern OH and northwestern
       PA. Supercell characteristics have emerged on two of the more
       dominant storms (Ashtabula/Trumbull and Wayne/Holmes counties) in OH
       suggesting a locally greater risk of damaging wind gusts and severe
       hail. While lapse rates are not particularly steep (7 C/km), 40+ kt
       of effective shear from the 19z PBZ special sounding should continue
       to support supercells capable damaging winds and potentially hail
       near 2 inches. Additional severe storm development will be possible
       farther west into central OH, though uncertainty remains higher.
    
       ..Lyons.. 06/16/2022
    
       ...Please see www.spc.noaa.gov for graphic product...
    
       ATTN...WFO...CTP...PBZ...CLE...ILN...
    
       LAT...LON   40847917 40357930 40257969 40128032 40148083 40148185
                   40118275 40358279 40848212 41528111 41848033 41947964
                   41887931 41727921 41537915 41077915 40847917 
    
  3. 3 hours ago, Ahoff said:

    What is an elevated thunderstorm?  Don’t think I’ve ever heard that term before?  Why would it get temperatures warmer?

    I just know from my history of storms that when I see elevated thunderstorms in forecast discussions they are usually ahead of warm fronts moving from the southwest to northeast. Most times they seem to come overnight. I like them because they usually are not severe but can have a lot of lightning. I always enjoyed the overnight storm with the rain and the lightning. 

    I don't know if it has anything to do with making it warmer. What I meant was that knowing the storms were coming ahead of the front and storms in the morning we can sometimes clear out in the afternoon and the temp will rise fast mainly from the front itself. 

    Just an observation on my part. I am not a met. Just going from experience. 

     

    https://www.weather.gov/source/zhu/ZHU_Training_Page/thunderstorm_stuff/elevated_convection/elevated_convection.html

    • Thanks 1
  4. 2 hours ago, Ahoff said:

    You don't have to call it my ridge.  I'm not rooting for any major heat at this point, just want some dry weather.  If that comes with low 60s or low 90s, I don't care.  Just stop raining!

    I agree. Just eliminate the extremes. Let's get some constant 70+ degree days with fronts twice a week with 4 or 5 days of dry weather instead of every other day we get a new system with precip. 

    • Like 1
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