WeatherTalk: Warm blob in the Pacific could impact fall weather here
This warm blob has been created by a large region of high pressure in the atmosphere.
FARGO — An oceanic heat wave has been developing this summer in the northern part of the Pacific Ocean, south of Alaska. An area of the North Pacific about the size of Alaska is anomalously warm by about 7 to 8 degrees Fahrenheit. This warm blob has been created by a large region of high pressure in the atmosphere which, itself, has resulted from cooler-than-average tropical Pacific water temperatures from the ongoing La Niña, and it is likely to persist into the fall.
The blob's impact on our weather here in the Northern Plains and Upper Midwest is to raise the probability of warmer than average and drier than average conditions for the fall season. As with any long-range forecast, other global-scale impacts, such as an unexpected change in the ongoing La Niña, may develop which could supersede the impacts from this warm blob of ocean water.