The daytime chill was fostered by clouds, light rain and drizzle from low clouds trapped under a warm ridge of high pressure several thousand feet above the ground.
32.
Sizzling heat will broil the Southwest and southern Plains Tuesday as a broad, warm ridge of high pressure several thousand feet aloft expands east toward the Mississippi Valley.
33.
Unseasonably warm weather will embrace the western Plains on Tuesday and Wednesday as a warm ridge of high pressure drifts eastward from the Front Range of the Rockies.
34.
High heat and humidity will continue to stifle the southern plains and western gulf states as a warm ridge of high pressure builds east from the southern Rockies.
35.
Early Monday afternoon, temperatures soared to a record 87 degrees at Midland in west Texas as an expansive, warm ridge of high pressure governed much of the Southwest.
36.
The typical distance between warm ridges and cold troughs in the jet stream that girdles the hemisphere is about 2, 000 miles, roughly the width of the United States.
37.
Thunderstorms will reform today over the northern Sierra and much of the Rockies, fueled by moisture summoned northward from the tropical Pacific by the warm ridge over the West.
38.
This spring, little rain has fallen across the peninsula and sunshine has been plentiful as a warm ridge of high pressure has held steady several thousand feet above the ground.
39.
Not only will the sprawling warm ridge continue to embrace the region Wednesday, but it will also impede the eastward progression of a Pacific low pressure system west of Vancouver Island.
40.
By noon Monday, temperatures had soared into the 80s across eastern Washington and eastern Oregon as a warm ridge of high pressure held steady at 20, 000 feet over the Pacific Northwest.
