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Mesoscale Discussion 425 | |
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Mesoscale Discussion 0425 NWS Storm Prediction Center Norman OK 0543 PM CDT Thu Apr 11 2024 Areas affected...West Virginia...Far Western Maryland...Far Southwest Pennsylvania Concerning...Tornado Watch 105... Valid 112243Z - 120045Z The severe weather threat for Tornado Watch 105 continues. SUMMARY...An isolated tornado and wind-damage threat is expected to continue across parts of the central Appalachians for several more hours this evening. At this time, it appears that new watch issuance to the east of the ongoing watch will be unlikely. DISCUSSION...The latest water vapor imagery shows an upper-level trough over the Ohio and Tennessee Valleys, with the exit region of a mid-level jet moving across the central Appalachians. Large-scale ascent appears to be maximized within this feature, which will continue to support scattered thunderstorm development this evening. The exit region of the jet was also creating moderate deep-layer shear over the top of a weakly unstable airmass, with MLCAPE estimated between 250 and 500 J/kg. The instability and shear should be just enough to continue an isolated tornado and wind-damage threat over the next few hours with the watch. An isolated severe threat could also develop just to the east of the current watch, but the magnitude of the threat is expected to be too marginal for new weather watch issuance. ..Broyles.. 04/11/2024 ...Please see www.spc.noaa.gov for graphic product... ATTN...WFO...CTP...LWX...RNK...PBZ...RLX... LAT...LON 37518051 37348117 37458191 37848214 38518186 39378104 39978011 39807892 39257887 38637931 37518051 |
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