Power prices briefly spiked above $1,000/MWh on Long Island Wednesday due to a combination of cold weather and an unplanned transmission outage.

The price jolt occurred around noon and lasted for only a few minutes when the East Garden City Bank #2 line failed due to equipment issues between 10:45 a.m. and 2 p.m., according to NYISO spokesman David Flanagan.

The Long Island Zone K jumped to about $1,102/MWh. The adjacent Zone J, in New York City, remained at about $33/MWh.

The Zone K day-ahead forecast was for 2,450 MW from 9 a.m. to 2 p.m., but real-time demand was 2,550 MW.