597
ACUS11 KWNS 090646
SWOMCD
SPC MCD 090645
MOZ000-KSZ000-090815-

Mesoscale Discussion 1213
NWS Storm Prediction Center Norman OK
0145 AM CDT Sun Jun 09 2024

Areas affected...south-central and southeast Kansas.

Concerning...Severe Thunderstorm Watch 400...

Valid 090645Z - 090815Z

The severe weather threat for Severe Thunderstorm Watch 400
continues.

SUMMARY...The severe wind threat will continue through the early
morning hours.

DISCUSSION...A long-lived line of severe wind producing
thunderstorms continues east across south-central Kansas. Recent
gusts of 50 knots in Pratt, KS and 51 knots near Medicine Lodge, KS
have been observed and radar trends suggest the severe wind threat
may have increased recently with 50 to 60 knots of base velocity
sampled by KICT. This is likely related to the strengthening
low-level jet (now near 50 knots on the VNX VWP) and the changing
orientation of the squall line. This changing orientation (now
aligned more normal to the 0-3 km wind shear vector) and the
presence of multiple outflow boundaries from the line of storms
across east-central Kansas, may increase the tornado threat for a
few hours as ingestion of low-level streamwise vorticity is favored.


A recent 50 knot wind gust was observed on the Woods County, OK
mesonet as the outflow boundary passed, outside of the convection.
This indicates the strength of the cold pool which as developed.
Given this mature cold pool and a reservoir of mid 70s dewpoints
which remain across south-central and southeast Kansas, this line of
storms may persist with a severe wind threat through the morning as
it moves east.

The NWS in Wichita will locally extend watch 400 for areas east of
Wichita to cover this threat.

..Bentley.. 06/09/2024

...Please see www.spc.noaa.gov for graphic product...

ATTN...WFO...SGF...EAX...TOP...ICT...DDC...

LAT...LON   37139839 37339867 37829874 38129873 38349769 38289559
            38009486 37499460 37099481 37029639 37139839