The March warmth was due to a high pressure ridge
over Alaska and northwest Alaska that lasted two weeks.
An important mesoscale feature of this event is a low-level pressure ridge
and associated northerly flow that developed over the western side of the Central Valley of Northern California; as this pressure ridge
extended southward, strong pressure gradients and associated gusty northerly and northeasterly winds moved toward and over the Wine Country region.
He hit a pressure ridge
in the ice, wrapping the front prop around the cowling and stopping its rotation.
A massive high pressure ridge
, with a clockwise circulation of air around it, will pump hot, dry air filled with dust from the Sahara Desert into the Iberian Peninsula through the weekend.
Every time we neared a climbable pressure ridge
, he would stop to glass, scanning the ahead.
The National Weather Service reported 17 daily heat records were broken in Southern California on Sunday, because of a high pressure ridge
over the Four Corners region of the Southwest.
A high pressure ridge
is going to cause the weather to fine up in Tasmania and Victoria on Jan 1.
A cold front is by definition the estimated position of the interactive zone between a low pressure col and a high pressure ridge
Occasional breaks in the ride occurred when we would encounter a pressure ridge
, which is a place where the sea ice heaves up into a miniature mountain range.
Earlier the same day both had taken dramatic falls, with 33-year-old Parks ending up "dazed" after he slipped on another pressure ridge
and was hit on the head by his 50kg sleigh.
On several occasions the sleds actually left the ground as they hurtled back down the other side of a pressure ridge
before crashing into the next wall of ice.
Efforts to secure a hovercraft barge to cut a channel for the whales were stymied by technical problems and an impregnable 30-foot-high pressure ridge
. Ron Morris, with the NMFS office in Anchorage, and Eskimos began using chain saws on 15 October to enlarge the shrinking breathing holes.