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Mesoscale Discussion 1022
NWS Storm Prediction Center Norman OK
0748 AM CDT Sat Jun 27 2020
Areas affected...Portions of central IN into far western OH
Concerning...Severe potential...Watch unlikely
Valid 271248Z - 271415Z
Probability of Watch Issuance...20 percent
SUMMARY...An isolated damaging wind threat may spread into the
Indianapolis metro over the next hour or two. Watch issuance appears
unlikely at this time.
DISCUSSION...A small cluster of storms is ongoing this morning
across parts of central IN, and is possibly being aided by a
convectively enhanced mid-level vorticity maximum from earlier
storms. Although the airmass downstream of this activity is only
weakly unstable (MLCAPE 500-1000 J/kg), there is modestly
strengthening flow through mid levels per recent VWPs from KIND.
This may be enough to support continued storm organization, with a
linear mode likely to persist. Recent radar data from KIND shows a
small portion of this cluster with enhanced low-level velocities
approaching the Indianapolis metro. Isolated damaging winds should
be the main threat in the short term, with the marginal
thermodynamic and kinematic environment probably acting to limit the
overall severe threat for at least the next couple of hours.
Therefore, watch issuance appears unlikely at this time.
..Gleason/Grams.. 06/27/2020
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...ILN...IND...
LAT...LON 39788715 40068673 40188630 40288566 40268471 39958457
39528462 39288490 39178544 39148593 39318665 39558713
39788715
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