La Nina will tighten chilly grip on NW

La Nina conditions, associated with cold and wet Northwest winters, have strengthened in the past month.

La Nina conditions, a harbinger of a cold and wet winter in the Northwest, have strengthened over the past month in the Pacific Ocean, the National Oceanic and Atmospheric Administration reported today,

Below-average sea-surface temperatures along the equator in the central and eastern Pacific became increasingly prominent, according to NOAA’s monthly update on ocean conditions.

Climatologists lean heavily on ocean temperatures to make seasonal forecasts. NOAA’s Climate Prediction Center is scheduled to issue a new three-month outlook Dec. 21.