901
ACUS11 KWNS 181404
SWOMCD
SPC MCD 181403
ALZ000-FLZ000-MSZ000-LAZ000-181530-
MESOSCALE DISCUSSION 1182
NWS STORM PREDICTION CENTER NORMAN OK
0903 AM CDT THU JUN 18 2026
AREAS AFFECTED...PORTIONS OF THE CENTRAL GULF COAST
CONCERNING...TORNADO WATCH 351...
VALID 181403Z - 181530Z
THE SEVERE WEATHER THREAT FOR TORNADO WATCH 351 CONTINUES.
SUMMARY...THE POTENTIAL FOR TORNADOES AND DAMAGING WIND GUSTS
CONTINUES ACROSS TORNADO WATCH 351. THIS RISK IS EXPECTED TO SPREAD
INLAND AND EASTWARD THROUGH THE MORNING.
DISCUSSION...REGIONAL RADAR IMAGERY DEPICTS SEVERAL SUPERCELLS
EMBEDDED WITHIN A BROADER PRECIPITATION SHIELD DOWNSTREAM OF THE
REMNANTS OF TROPICAL STORM ARTHUR, CURRENTLY ANALYZED OVER NORTHERN
LOUISIANA. THIS ACTIVITY HAS PRODUCED SEVERAL REPORTS OF
WIND/POTENTIAL TORNADO DAMAGE OVER SOUTHEASTERN LOUISIANA AND
SOUTHERN MISSISSIPPI OVER THE PAST SEVERAL HOURS, WITH LOW-LEVEL
VROT SIGNATURES RANGING FORM 30-40 KTS AT TIMES. EXPECTATION IS FOR
THIS ACTIVITY TO PERSIST THROUGH THE MORNING WHILE SPREADING
INLAND/EASTWARD ALONG A THERMAL/INSTABILITY GRADIENT (LOW-80S F
TEMPERATURES AND RICH TROPICAL MOISTURE CONTRIBUTING TO GREATER
MLCAPE OF 500-1500+ J/KG ANALYZED ALONG THE COAST). STRONG LOW-LEVEL
FLOW AND SRH (45-50 KTS AT 2 KM AGL AND 200 M2/S2 0-500 M SRH,
RESPECTIVELY, SAMPLED BY THE HDC/MOB VWPS) AND LOOPING HODOGRAPHS
WILL CONTINUE TO FAVOR THE DEVELOPMENT/MAINTENANCE OF LOW-LEVEL
MESOCYCLONES WITH THE POTENTIAL FOR TORNADOES AND DAMAGING WIND
GUSTS.
..CHALMERS.. 06/18/2026
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
ATTN...WFO...BMX...MOB...JAN...LIX...
LAT...LON 30258909 30308960 30388979 30658995 30828995 31108979
31718913 32038869 32208841 32298820 32298791 32208766
32018738 31738715 31558716 31238729 30848773 30688805
30458848 30288898 30258909
MOST PROBABLE PEAK TORNADO INTENSITY...85-110 MPH
MOST PROBABLE PEAK WIND GUST...UP TO 60 MPH
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