Mesoscale Discussion 885

Issued

Jun 8, 2021, 2:47 PM CDT (19:47 UTC)

Expired

Jun 8, 2021, 4:45 PM CDT

In force

118 min

Issued by

the Storm Prediction Center

Concerning

Severe thunderstorm watch 246

Counties Caldwell Parish, LA, East Carroll Parish, LA, Franklin Parish, LA, Madison Parish, LA, Richland Parish, LA, West Carroll Parish, LA, Issaquena County, MS, Sharkey County, MS, Warren County, MS

The Jackson/Brandon,MS radar (KDGX), 129 km from the middle of the area, began a volume at 19:50 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

576 
ACUS11 KWNS 081947
SWOMCD
SPC MCD 081947 
MSZ000-LAZ000-082145-

Mesoscale Discussion 0885
NWS Storm Prediction Center Norman OK
0247 PM CDT Tue Jun 08 2021

Areas affected...northeast LA...west-central MS

Concerning...Severe Thunderstorm Watch 246...

Valid 081947Z - 082145Z

The severe weather threat for Severe Thunderstorm Watch 246
continues.

SUMMARY...Isolated strong to locally severe gusts will be capable of
wind damage as the line segment over northern LA moves to the MS
River over the next 1-2 hours.

DISCUSSION...Radar mosaic shows a long-lived linear segment over
northern LA as of 240 pm moving to the east-northeast at 35 kt.  The
airmass downstream of the line segment has warmed to near 90 deg F
with low to mid 70s dewpoints.  Although the wind profile is
relatively weak (at or below 20-25 kt from the surface through 7 km
AGL via the Jackson, MS 88D VAD), an enhanced belt of stronger low
to mid-level flow will gradually move from northeast LA to
west-central MS in conjunction with the linear segment and
associated parent MCV/speed max over northern LA.  Time/height
trends from the Shreveport, LA 88D VAD showed the belt of 50-kt flow
in the 2-4 km AGL layer between 1145am-115pm.  Therefore, it seems
reasonable this belt of stronger flow will continue east and aid in
storm organization across the Delta region over the next several
hours.  Isolated strong to severe gusts capable of wind damage is
the threat with these storms.

..Smith.. 06/08/2021

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

ATTN...WFO...JAN...SHV...

LAT...LON   31989218 32759190 32979064 32659049 32069069 31989218

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The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.