ACUS11 KWNS 181012
SWOMCD
SPC MCD 181012=20
ALZ000-MSZ000-LAZ000-181115-

Mesoscale Discussion 1178
NWS Storm Prediction Center Norman OK
0512 AM CDT Thu Jun 18 2026

Areas affected...Eastern Louisiana...Southern
Mississippi...Southwest Alabama

Concerning...Tornado Watch 348...

Valid 181012Z - 181115Z

The severe weather threat for Tornado Watch 348 continues.

SUMMARY...A tornado threat will likely continue into the mid to late
morning over parts of eastern Louisiana and southern Mississippi.
The threat may also impact southwest Alabama. A watch extension or
replacement watch will be needed.

DISCUSSION...The remnants of Tropical Cyclone Arthur is currently
moving inland across the lower Mississippi Valley. On the
southwestern edge of the system, multiple supercells are ongoing
that are capable of producing tornadoes. These storms are located
just to west and north of New Orleans, near the center of a 40 knot
low-level speed max analyzed by the RAP. In this vicinity, the
latest WSR-88D VWP to the northwest of Lake Pontchartrain currently
shows a looped hodograph, with 30 to 40 knots of flow in the lowest
2 km above ground level. This environment will support a continued
tornado threat as the system moves slowly north-northeastward this
morning. Isolated severe wind gusts will also be possible.

..Broyles.. 06/18/2026

...Please see https://urldefense.com/v3/__http://www.spc.noaa.gov__;!!DZ3fj= g!5r0_cVbIYdjcECYlbYTFyollBKpqu7dwZSVkdYxZBR4bbK-ToB1SBql6b4qSk3-w2gpyE1XFF= mHEe-nne7GVKxWJP1w$ for graphic product...

ATTN...WFO...MOB...JAN...LIX...LCH...

LAT...LON 31169115 31609043 31808961 31858873 31718811 31418771
31018760 30618771 30358798 29978858 29588976 29569045
29649104 30019154 30669156 31169115=20

MOST PROBABLE PEAK TORNADO INTENSITY...85-110 MPH
MOST PROBABLE PEAK WIND GUST...UP TO 60 MPH


=3D =3D =3D
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