Monday, October 20, 2025 Squall Line Potential

[weatherwiz]

A vigorous shortwave trough crosses the region late Sunday night and Monday with strong cold front and triple point moving across the region Monday morning. This system will be characterized by a potent 80+ knot mlvl jet streak and 60-70+ knots of bulk shear overspreading the region to go along with steeping mid-level lapse rates associated with cooling temperatures aloft. Out ahead of the shortwave trough, a strong southerly flow will develop pumping in an unseasonably moist low-level air mass. 

The combination of an unseasonably moist low-level airmass combined with modestly steep mid-level lapse rates (~ 6.5 C/KM) should yield upwards of 250-500 J/KG of MLCAPE. Bulk shear values in excess of 60-70 knots combined with vigorous forcing will likely promote a squall line consisting of heavy rain, thunder/lightning, and strong-to-damaging wind gusts along the leading edge, moving across the region early-to-late morning Monday. Forecast soundings exhibit enough low-level turning, particularly in the vicinity of the triple point to warrant potential for a few embedded QLCS tornadoes. 

[Cyclone-68]

This is a mortal lock because I won’t be around to enjoy it 

[Damage In Tolland]

Reminds me of the Oct 3, 1979 Windsor Locks setup 

[CoastalWx]

Meh

[Damage In Tolland]

Looks pretty wild Monday AM

[CoastalWx]

Maybe right on S coast can watch. Looks meh outside that.

[Torch Tiger]

Never looked like much