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Mesoscale Discussion 274 |
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Mesoscale Discussion 0274
NWS Storm Prediction Center Norman OK
0604 PM CDT Fri Mar 26 2021
Areas affected...South-central NE into portions of northern/central
KS
Concerning...Severe potential...Watch unlikely
Valid 262304Z - 270045Z
CORRECTED FOR GEOGRAPHIC HEADLINE
Probability of Watch Issuance...20 percent
SUMMARY...Isolated thunderstorm development is possible this
evening, with the strongest storms capable of posing some threat of
hail and localized strong wind gusts.
DISCUSSION...At 2230Z, deepening cumulus and a few nascent attempts
at deep convection are ongoing across portions of northwest into
central KS, near and to the east of a surface low. Low-level
moisture remains limited across this region, but temperatures have
warmed into the 60s F near and to the south of a warm front located
near the NE/KS border, and isolated to widely scattered thunderstorm
development is expected early this evening.
The dry boundary layer in combination with a relatively low
tropopause will result in convection that is both somewhat
high-based and low-topped, which will tend to limit storm intensity.
However, steep midlevel lapse rates and relatively cold temperatures
aloft, in conjunction with effective shear of 30-40 kt, will support
some hail threat with the strongest updrafts. Isolated strong wind
gusts will also be possible with any storms in areas where stronger
boundary-layer heating and mixing occurred this afternoon. The
overall coverage and magnitude of the threat appears too limited for
watch issuance.
..Dean/Grams.. 03/26/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...OAX...TOP...ICT...GID...DDC...GLD...
LAT...LON 39129935 39439975 39789996 40209983 40369961 40529881
40329789 40159748 39779683 39399652 38449658 38179745
38829857 39129935
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