The atmosphere remains saturated this morning across Quebec and Ontario as well as northern New England. Nearly 50mm or 2 inches of rain fell in Montreal yesterday afternoon and evening. In northern New York and Vermont from Plattsburgh and Burlington north to the border, upwards of 3 to 6 inches (75-150mm) of rain has been reported. Flash flood watches are in effect in those regions. More showers and thunderstorms are expected today in the warm and very humid air. Dew point temperatures are in the low 20's (70's F) which is more indicative of the southern US not Quebec. This saturated air will produce juicy thunderstorms later today, with the potential for more heavy rain.
Meanwhile south of this frontal boundary, a dangerous heatwave prevails across the southern and central US. Triple digit highs were reported yesterday from Dallas to Memphis and numerous places in between. Those who did not reach the century mark were in the high 90's. High humidity has pushed the heat index into the 105 to 120F range. Portions of 13 states are under heat advisories. The dangerous heat has lead to numerous weather related deaths. Even overnight temperatures have remained in the 80's with several locations smashing records for warmest lows.
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