Update: Weather Service Flash Flood Watch in Effect
POTTSTOWN PA – A flash flood watch that remains in effect from Wednesday (Sept. 8, 2021) afternoon through late night hours has been issued for western Montgomery County in general, and specifically for the boroughs of Pottstown and Collegeville, by the National Weather Service office in Mount Holly NJ.
“Thunderstorms with heavy rain are forecast to move through the region this evening,” the weather service confirmed. “Given the very saturated soils from recent heavy rain events, additional brief heavy rainfall of one to two inches may quickly lead to flooding of flood prone and other low-lying areas due to rapid runoff,” it added.
It concurrently issued a hazardous weather outlook notice that asked its corps of weather spotters “to report significant weather conditions according to standard operating procedures.”
Read an earlier story on the day’s weather, published Wednesday morning by The Posts:
AccuWeather: Rainy Wednesday May Renew Flooding
STATE COLLEGE PA – Residents across western Montgomery County and the remaining Northeast, many of whom are still recovering from disastrous impacts caused by Tropical Storm Ida last week, should be on alert for showers and thunderstorms that could trigger additional flooding this week, State College-based AccuWeather Inc. reported Wednesday (Sept. 8, 2021).
A cold front that produced severe weather Tuesday night (Sept. 7) across the Great Lakes will shift Wednesday into the Northeast and deliver rounds of stormy weather, it predicted. “For the first time since Ida’s catastrophic flooding, parts of the Northeast will have the potential for more downpours and gusty winds,” said AccuWeather Meteorologist Dean Devore.
Widespread rainfall amounts near a half-inch are forecast across the region, while more localized amounts from 1 to 2 inches are expected, especially in any thunderstorms. While an inch of rain is not an excessive amount on a typical late-summer or early fall day, the recent heavy rain across the Northeast will make many areas more susceptible to flooding.
Specifically in the Philadelphia suburbs through portions of New Jersey, AccuWeather warned, the nearly 10 inches of rain that fell last week will make it possible for some areas to flood Wednesday, even if less than an inch of rain falls over three hours’ time.
Residents should be vigilant in heeding any warnings issued for their area, it said. Drivers should be prepared for slowed travel due to downpours that reduce visibility and cause ponding on roadways.
Map graphics provided by AccuWeather