spc ac 180539
day 2 convective outlook
nws storm prediction center norman ok
1239 am cdt sat apr 18 2026
valid 191200z - 201200z
...no severe thunderstorm areas forecast...
...summary...
severe thunderstorms are not expected on sunday.
...synopsis...
a strong mid-level trough will move slowly east from the great lakes
to the northeast on sunday. at the surface, a large area of high
pressure will extend from the plains to the midwest and southeast.
this will help advance the cold front (and richer moisture) into the
atlantic and the gulf.
the prevalence of high pressure and a continental, dry airmass
across most of the country will lead to minimal thunderstorm chances
on sunday. a few isolated thunderstorms could develop along the
front from eastern georgia to eastern north carolina before the
front moves offshore. scattered thunderstorms are possible along the
eastern shore of the florida peninsula, but given the weak
instability, strong to severe concern remains minimal.
finally, thunderstorms that form over the higher terrain in northern
mexico on sunday may move into parts of south texas and the edwards
plateau before weakening in the increasingly hostile post-frontal
environment.
..bentley.. 04/18/2026
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note: the next day 2 outlook is scheduled by 1730z