In a surprise, the GFS Ensemble has equaled or exceeded ECM Ensemble in medium-range skill scores (of 2-meter temperature forecasts) during the past 30 days. Regions of the high demand energy East U.S. produced better GFS 9than ECM) ENS skill scores - a rare event!

Several new issues have emerged in the tropics – all of which could impact the U.S. The first is Tropical Disturbance 94L. This system will enter the Bay of Campeche as a low-pressure system today. Over the warm waters of this region, 94L should have no problem strengthening to a tropical depression in 24 hours and a tropical storm within 36-48 hours.