In a holiday-abbreviated period in which futures struggled, weekly natural gas cash prices sustained just enough momentum to post a third consecutive gain.  

NGI’s Weekly Spot Gas National Avg. for the Jan. 18-21 period advanced 20.5 cents to $6.155. The covered week was shortened by a day due to the Martin Luther King Jr. holiday on Monday.

The gain for the week kept alive a 2022 win streak after strong gains the first two weeks of January. Conditions during the latest week were mild at times and spot prices fluctuated, but there was enough cold in the Midwest and East to keep gas-powered furnaces cranking and prices on an upward climb.

At the close of trading Friday, ANR ML7 in the Midwest was ahead 36.0 cents to $4.555. In the East, Iroquois Zone 1 jumped $1.350 to...