|Mesoscale Discussion 1259|
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Mesoscale Discussion 1259
NWS Storm Prediction Center Norman OK
0254 PM CDT Fri Jul 07 2017
Areas affected...Southeast IN...Southwest IN...North-central KY
Concerning...Severe Thunderstorm Watch 401...403...
Valid 071954Z - 072130Z
The severe weather threat for Severe Thunderstorm Watch 401, 403
SUMMARY...Line of storms moving through central IN is expected to
continue southeastward for at least the next few hours. Continued
threat for damaging wind gusts and isolated hail will necessitate
the issuance of a downstream watch.
DISCUSSION...Complicated surface pattern exists across the region
with multiple boundaries interacting with the ongoing convective
complexes. Outflow boundary associated with the convective line
moving across southeast OH extends back northwestward through
southwest OH and into central IN where it intersects a pre-frontal
trough ahead of the approaching cold front. The intersection is near
OKK, where several ongoing storms have recently strengthened, likely
as a result of storm mergers.
Overall expectation is for the ongoing complex to continue
southeastward along and south of the outflow boundary into southeast
IN, southeast OH, and portions of north-central KY. Damaging wind
gusts and isolated hail are possible as these storms continue
southeastward and a watch will likely be needed across portions of
the region. Some of this area (i.e. southwest OH) is in Watch 401,
which is schedule to expire at 21Z, so the new watch will be issued
to effectively replace portions of Watch 401.
...Please see www.spc.noaa.gov for graphic product...
LAT...LON 37698513 38278620 38988670 39898596 40058421 39208297
38318288 37778361 37698513
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