A major shift in the weather pattern will drive cooler air southward across the Plains and into Texas through this weekend.
After a long, hot summer in much of Texas and the southern Plains, any relief from the 100-degree readings will be more than welcome.
Cooler, less humid air will travel thousands of miles to the south from Canada during the second half of this week, reaching Oklahoma before the week comes to an end.
The air will push southward across much of Texas over the weekend.
High temperatures are forecast to be 15 to 25 degrees lower in the wake of the front. In Dallas and San Angelo, highs are forecast to be in the 80s both days of the weekend. By Sunday, the more comfortable air will reach into San Antonio, Houston and El Paso.
It is possible that temperatures and humidity levels will be shaved as far south as South Texas and part of northern Mexico by early next week.
Ahead of the front through the end of the week, the heat will continue over the region.
As the front pushes southward, there is the potential for a severe weather outbreak over portions of the South Central states spanning into Saturday.
The pattern change will bring additional rounds of showers and thunderstorms to portions of the Ohio Valley, South and East this weekend.
A dip in steering currents will drive the cool air across the Plains and could work to draw Leslie northward into Atlantic Canada next week.
Rounds of drenching thunderstorms could bring drought relief to parts of the southern United States into July.
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Before air conditioning existed, people had to be creative when trying to stay comfortable in sweltering conditions.
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Duluth, MN (1996)
89 degrees at the airport and only 58 degrees at the lake.
San Antonio, TX (2007)
Record daily rainfall; 3.07 inches. Previous record was 1.86 inches in 1929. Flooding forced officials to close 47 streets and led to 39 high-water rescues.
Record highs: Missoula: 98 (95/1985) Butte: 94 (90/1966) Anaconda: 94 (89/1984) Helena: 99 (95/2006) Kalispell: 92 (90/1984) Drummond: 96 (95/1984) Belgrade: 100 (93/1984)