MD 0425 CONCERNING TORNADO WATCH 105… FOR WEST VIRGINIA…FAR WESTERN MARYLAND…FAR SOUTHWEST PENNSYLVANIA
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
