The forecast remains on track for unseasonably cool temperatures, showers, and elevated thunderstorms to continue north of a cold front that has stalled along the Southern Tier.
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Current radar and satellite imagery across the Southwest and Southern Plains show gradually expanding thunderstorm coverage as a series of upper level disturbances embedded within the subtropical jet interact with a moist atmosphere, some of which prompted a few Flash Flood Warnings earlier today.
This stormy pattern is expected to continue at least through the end of the work week as the front lingers in the region, where a Slight Risk (threat level 2/4) of Excessive Rainfall is in effect today and tomorrow.
Rainfall aside, the post frontal airmass will support below average temperatures across much of the Southern Plains and Great Basin through the beginning of the weekend, before a warm and dry trend sets in Saturday.
Meanwhile, portions of the Northeast and New England remain active with heavy rainfall today as training thunderstorms continue ahead of a slow moving cold front.
As of this afternoon, Flood Watches extend across portions of Connecticut into New Hampshire, where hourly rainfall rates of 1 2"/hour within the training activity could quickly cause flash flooding as soils are saturated from recent heavy rainfall.
Also along the East Coast even though Hurricane Lee remains well offshore, the storm is already producing dangerous surf and rip currents along portions of the Southeast Coast.
These conditions are forecast to spread northward along the remainder of the East Coast over the next couple of days.
As Lee begins to approach portions of New England/Atlantic Canada later this week, there is an increasing risk of wind, coastal flooding, and rain impacts from Lee in portions of New England beginning on Friday and continuing through the weekend. ■
A clipper system will move quickly across the northern Plains into the Midwest Friday and the Northeast by Saturday, bringing a wintry mix of rain and snow showers ahead of a sweeping cold front.