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[June 24, 2010] (AP) Portions of the East were forecast to see a bit of relief from this week's heat Thursday as a cold front from the central U.S. trekked eastward.

(Click on map for larger image.)

High pressure building over the central Rockies would nudge the frontal boundary out of the Midwest and into the Northeast throughout the day. As the system progressed, light, scattered rain showers and thunderstorms would fall across areas of the upper and lower Great Lakes and the Ohio Valley, before reaching into New England during the latter half of the day. Daytime heating and rich moisture combined with increasing instability from the advancing front would create slight chances for severe weather activity from the central Appalachians to New England. The main threat of these storms would be damaging winds, but they may also produce hail and isolated tornadoes.

Meanwhile, to the south, daytime highs across the Southeast were expected to return to more seasonal ranges during the next couple days. A decrease in humidity levels would follow, returning heat index values back to lower levels.

In the West, another patch of severe weather would be possible in eastern Colorado and northeastern New Mexico on Thursday. The main threat of these storms would be hail and damaging winds. The rest of the West would continue to see calm weather activity with unseasonably cool temperatures.

Temperatures in the Lower 48 states Wednesday ranged from a low of 27 degrees at Big Piney, Wyo., to a high of 114 degrees at Death Valley, Calif.

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[Associated Press article from Weather Underground]