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Mesoscale Discussion 949 |
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Mesoscale Discussion 0949
NWS Storm Prediction Center Norman OK
0108 PM CDT Sun Jun 13 2021
Areas affected...central and eastern Colorado
Concerning...Severe potential...Watch unlikely
Valid 131808Z - 131945Z
Probability of Watch Issuance...5 percent
SUMMARY...A few severe storms may evolve off the higher terrain and
DCVZ early this afternoon. Weak shear should limit organization
potential into a few stronger multi-cell updrafts capable of hail or
isolated damaging wind gusts.
DISCUSSION...Midday visible satellite imagery showed towering
cumulus/incipient updrafts deepening along the Front Range and
Palmer Divide where strong solar heating is taking place.
Temperatures have warmed into the 70s and near 80F with dewpoints
ranging from the upper 40s to the west to near 60 F east of I-25.
While SPC mesoanalysis and RAP soundings indicate substantial MLCINH
(-100 to -300 J/kg) still exists with eastward extent, a narrow
corridor of destabilization (1000-2000 J/kg of MLCAPE) along the
immediate lee of the higher terrain may support a few strong/severe
storms early this afternoon. Aided in part by localized convergence
and orographic influences, MLCINH will gradually erode to the east
allowing storms, and the associated severe risk to expand onto the
high plains with time. Deep-layer shear will remain somewhat
marginal for organized convection at or about 25 kts. This should
favor a multicellular mode with the primary hazards being hail and
isolated damaging wind gusts. Given the expected sporadic nature of
any severe risk, a watch is not likely.
..Lyons/Grams.. 06/13/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...PUB...BOU...
LAT...LON 37390512 37970524 38580552 39190572 40410589 40700568
40590544 39510466 38980445 38540441 38170455 37310479
37390512
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