And we’re off for the next 2 hours with high school girls 4×100 qualifying races. Edwin Allen (JAM) wins first heat in 47.00. They won the last two Penn titles, both sub-45.00. That’s how you know it’s cold!

Deep Creek of Chesapeake, VA, and Camperdown of Jamaica came in sub-49 to win the next two heats, in 48.74 and 48.96, respectively.

Jamaica’s  Alpha Academy wins the 7th heat in 48.17.

Holmwood Tech (JAM) wins heat 11 by a straightaway (!) and sets a new best time for the day: 46.90.

In heat 17 Manchester, from Jamaica (where else?!) clocks 47.59.

More Jamaica: Herbert Morrison wins heat 25 in 46.91 (0.01 off the day’s top time so far) and St. Jago takes heat 26 in 47.11.

Vere Tech throws down with a 46.95 to win heat 32.

Top American time so far comes from Elizabeth Seton HS of Bladensburg, MD: 47.33 in heat 35.

Bethel of Virginia goes 47.99 in heat 12 of the large school sections.

Eleanor Roosevelt of Greenbelt, Maryland, rips the fastest time of the day — 46.11 — in large schools heat 25.

Click here for the “small schools” rankings.

Click here for the “large schools” rankings.