Valid 010100Z – 011200Z
…THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS WESTERN
Areas of strong to severe storms remain possible over the northern
Plains this evening and overnight.
Severe thunderstorm threat persists across the northern Plains,
primarily across western ND where Severe Thunderstorm Watch 548
remains in effect. In this area, convergence along the pre-frontal
trough will continue to support storm development amidst moderate
buoyancy and vertical shear. Large hail and/or strong wind gusts are
possible within the most robust storms. Farther southwest (northeast
WY), steep mid-level lapse rates and resulting buoyancy will support
thunderstorms for the next several hours. Isolated hail and strong
wind gusts are possible with the strongest/most persistent storms.
Recent surface analysis placed a low over southeast CO with a warm
front extending eastward into north-central K and then southeastward
through eastern KS. Nocturnal low-level jet is expected to result in
warm-air advection across this frontal zone this evening and
overnight. Mid-level lapse rates will remain steep enough for enough
elevated buoyancy to support a few strong thunderstorms. Some
isolated hail is possible.
…Mid-Atlantic and eastern New England…
Scattered thunderstorms continue across the region, with the highest
coverage of storms currently across southern ME and central PA. A
strong wind gust or two is possible within the line across ME but
the threat elsewhere appears to be less than 5%.