You know the smell I'm talking about. The moist, complex smell that is so prevalent in April and May. Birds are singing their encouraging melodies, dew points are in the 60s, and storm spotters are put on alert.
The past couple of days have been very spring-like. Saturday, St. Louis recorded a record high low temperature of 67 degrees (2 degrees above the normal high). Hail reports clogged the NWS phone lines last night as a line of storms invaded the I-44 corridor from Rolla, MO to Illinois.
It's not often we see these icons on our forecast page, let alone at the end of October. Although a severe event is not out of the question any given year, it certainly does catch you by surprise.
A powerful cold front is driving through Missouri tonight, bringing with it a squall line with embedded mesocyclones that are likely to produce some tornadoes (according to the latest evening HWO discussion). The quick pace of the front and resulting speed of the storms adds a higher degree of urgency if storms do turn severe.