Storm Prediction Center issues Mesoscale Discussion #1655 concerning SEVERE THUNDERSTORM WATCH 492 [Most Prob: Tornado: UP TO 90 MPH, Hail: UP TO 1.25 IN, Gust: 55-70 MPH]
209
ACUS11 KWNS 182247
SWOMCD
SPC MCD 182247
PAZ000-WVZ000-OHZ000-190045-
Mesoscale Discussion 1655
NWS Storm Prediction Center Norman OK
0547 PM CDT Sat Jul 18 2026
Areas affected...Parts of western PA and eastern/central OH
Concerning...Severe Thunderstorm Watch 492...
Valid 182247Z - 190045Z
The severe weather threat for Severe Thunderstorm Watch 492
continues.
SUMMARY...The most favorable corridor for damaging wind gusts will
extend from parts of western Pennsylvania into eastern and central
Ohio for the next couple of hours -- within Severe Thunderstorm
Watch 492.
DISCUSSION...Loosely organized clusters of thunderstorms are
tracking southeastward ahead of a cold front extending from western
PA into eastern/central OH. The PBZ and CCX VWPs are sampling around
45 kt of west-northwesterly 0-6 km shear oriented perpendicular to
the gust fronts of these clusters. This favorable shear orientation
and a narrow ENE-WSW-oriented corridor of warm/moist inflow will
continue to support damaging wind gusts over the next couple of
hours. Thereafter, storms will eventually move southeastward into an
air mass that has been overturned by earlier convection
(temperatures in the lower 70s in southwestern PA). This should
result in a gradual decrease in storm intensity into this evening.
..Weinman.. 07/18/2026
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...CTP...PBZ...RLX...CLE...ILN...
LAT...LON 40278283 40918053 41448018 41517969 41387850 41087824
40747848 40217950 39638182 39688249 39828290 40058300
40278283
MOST PROBABLE PEAK TORNADO INTENSITY...UP TO 90 MPH
MOST PROBABLE PEAK WIND GUST...55-70 MPH
MOST PROBABLE PEAK HAIL SIZE...UP TO 1.25 IN
Source: Storm Prediction Center issues Mesoscale Discussion #1655 concerning SEVERE THUNDERSTORM WATCH 492 [Most Prob: Tornado: UP TO 90 MPH, Hail: UP TO 1.25 IN, Gust: 55-70 MPH] (https://www.spc.noaa.gov/products/md/2026/md1655.html)
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