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ACUS11 KWNS 272307
SWOMCD
SPC MCD 272306 MEZ000-MAZ000-NHZ000-RIZ000-CTZ000-NYZ000-VTZ000-NJZ000-PAZ000-MDZ000-DEZ000-VAZ000-DCZ000-280000-
Mesoscale Discussion 1178
NWS Storm Prediction Center Norman OK
0606 PM CDT Fri Jul 27 2018
Areas affected...Portions of southern New England southward toward
the Mid-Atlantic
Concerning...Severe Thunderstorm Watch 312...313...314...
Valid 272306Z - 280000Z
The severe weather threat for Severe Thunderstorm Watch 312, 313,
314 continues.
SUMMARY...The severe threat persists across remaining portions of
WWs 312, 313, and 314.
DISCUSSION...The severe threat continues along and ahead of a broken
line of convection extending from southern New Hampshire
southwestward to southeastern Pennsylvania and central Virginia.
Occasional reports of wind/tree damage and 1-1.5 inch hailstones
have been reported with the strongest convection over the past few
hours with these storms. This threat should continue given the
moderately unstable (2000-2500 J/kg) and moderately sheared (35-45
kt) pre-convective airmass. Over time (i.e., the next couple of
hours) these storms may reach eastern portions of Massachusetts,
Connecticut, and Long Island (New York) and pose a severe threat
before the scheduled expiration times of each watch (02Z). If this
scenario materializes, spatial extensions of the Watches
(particularly WW 312) may be needed.
Continued maturation of cold pools west of the ongoing storms will
result in a decreased severe threat with time. Ongoing WWs in these
areas may be cancelled early.
..Cook.. 07/27/2018
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...GYX...BOX...BTV...OKX...ALY...PHI...BGM...AKQ... CTP...LWX...RNK...
LAT...LON 43697335 43667296 43327221 43347147 43767086 43967020
43857006 43137060 42457093 42087099 41667137 41397177
41277254 40987312 40707342 40607352 39247457 38567498
37917530 37427581 37077613 36697681 36677739 36887785
37577875 38067881 38457820 39057729 39827676 40647597
41367498 42017407 42767387 43327387 43697335
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