Mesoscale Discussion 0410
NWS Storm Prediction Center Norman OK
0554 PM CDT Sun Apr 02 2017
Areas affected...Portions of extreme southeastern Texas and
central/southern Louisiana
Concerning...Tornado Watch 110...
Valid 022254Z - 030030Z
The severe weather threat for Tornado Watch 110 continues.
SUMMARY...A threat for a couple tornadoes, damaging wind gusts, and
a few instances of large hail remains across southern/central
portions of Watch 110.
DISCUSSION...Radar trends across the Sabine Valley depict confluent
bands of convection feeding into the upshear flank of a larger-scale
convective system over the Mid-South this evening. With an evolution
towards a more southwest-northeast band of convection, low-level
shear vectors are now oriented more line-parallel, potentially
reducing the threat for multiple QLCS circulations. Nonetheless,
smaller-scale bow structures and related inflection points embedded
within the broader line may still yield a threat for damaging wind
gusts and a couple tornadoes this evening. Additionally, continued
large-scale ascent with the approach of the main trough is fostering
more discrete convective development along the aforementioned
confluent bands within the open warm sector. These cells exist
within a warm/moist environment characterized by continued ample
storm-relative helicity. As such, there will likely remain a threat
for a couple tornadoes, damaging gusts, and some large hail over the
next several hours.
..Picca.. 04/02/2017
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...JAN...LIX...LCH...SHV...HGX...
LAT...LON 30219465 31089398 31659288 31879221 31769165 31329157
30219226 30039305 29989435 30219465
Read morefrom SPC Forecast Products http://ift.tt/HLWMWh
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