Cloud cover in northeastern Colorado hampered celestial viewing overnight, but even if the sky had been cloudless, the Northern lights were a no -how.

"For us, it was a disappointment," said Joe Kunches, a forecaster with the federal Space Weather Prediction Center.

Predictions of peak viewing of the aurora borealis over Colorado didn't pan out. The forecast was based, in part, on recent solar flares, bursts of energy released from the sun that would charge the aurora borealis and expand its presence further south.

Kunches said forecasters knew the solar emissions were on the way, they just didn't know what type of punch they would pack.