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The original item was published from 7/16/2023 10:22:09 AM to 7/17/2023 10:05:01 PM.

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Posted on: July 16, 2023

[ARCHIVED] Severe Weather Alert: Sunday, July 16, 2023

Severe Weather Alert

The National Weather Service is forecasting heavy rainfall beginning early this morning across portions of Massachusetts. 

Heavy rain rates of 1-2 inches per hour are expected at times throughout much of the day before tapering off by tonight.

Widespread rain amounts from this system will range between 2-4 inches with higher amounts of 5-7 inches possible in some areas. 

Any areas that see persistent heavy rainfall are likely to see flooding, either urban or from rising rivers, creeks, and streams. Considerable flooding which can inundate roadways, business, and homes are highly possible across many areas today.

Thunderstorms are possible today and can be strong to severe in nature. A stronger upper level wind field in conjunction with a very unstable airmass gives concern for these strong-severe thunderstorms to form. In addition, the higher wind field aloft can produce a very short, weak, and isolated tornado. However the threat for that is low.

A Flood Watch has been issued for all of Massachusetts through 2 AM Monday, excluding Plymouth, Barnstable, Dukes, and Nantucket Counties where ground conditions are more favorable for handling higher rain amounts.

Potential weather impacts include:

Urban, street and basement flooding, as well as rapid rises on rivers, creeks and streams.

Considerable flooding may result in inundation in homes and business with road washouts possible.

Damaging winds and hail may occur associated with severe thunderstorms. Due to saturated ground conditions, winds as low as 40 MPH may result in downed trees.

Preparedness and Flood Safety Tips can be found here: 

Preparedness and safety tips for thunderstorms and lightning:
https://www.mass.gov/info-details/thunderstorm-and-lightning-safety-tips

Flood safety tips:
https://www.mass.gov/info-details/flood-safety-tips

Residents are encouraged to exercise caution. Do not drive through flooded areas. If you see a flooded-out road ahead, turn around. Find another route to your destination.

If there is no other route, get to higher ground and wait for the waters to subside.

Stay safe out there!

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