Rainy Weekend Trend Continues With Flooding Possible Through Saturday - NBC 10 Philadelphia
NBC10 First Alert Severe Weather Central

NBC10 First Alert Severe Weather Central

Rainy Weekend Trend Continues With Flooding Possible Through Saturday

Rainy periods into the weekend may trigger heavy rain, thunderstorms and even flooding

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    NEWSLETTERS

    Fog, Rain: NBC10 First Alert Weather

    After morning fog dissipates, rain will move in -- and continue through the weekend. Scattered rain showers are expected today, then some storms could move in Saturday, says First Alert Meteorologist Bill Henley.

    (Published Friday, June 1, 2018)

    What to Know

    • It won't take much rain to cause problems with the ground already saturated in some neighborhoods.

    • The time period that may create the most problems may be Saturday afternoon and evening as an area of low pressure begins to develop.

    • How much rain fell on weekends in the last 5 weeks? 3.95 inches! Another couple inches (or more) may be added to this by Sunday.

    Tired of the rain? Bad news. We’ve got another rainy stretch on the way.

    Tropical moisture is streaming into our area and will enhance rain chances as we head into the weekend.

    Worse, due to rain-soaked grounds, even a little more rain will increase the possibility of flooding. The Pennsylvania suburbs, Philadelphia and Mercer County are under the lowest Flash Flood threshold. That means only a couple of inches may cause problems in those locations. 

    Friday will be hot and steamy with scattered showers and thunderstorms likely. Late in the day, a cold front will approach the region. Periods of moderate rain may be enough to cause road ponding and creek swelling.

    The time period that may create the most problems may be Saturday afternoon and evening as an area of low pressure begins to develop over our region, triggering heavy rain and thunderstorms. While rain is possible all day long, the steady to heaviest storms will pass in the afternoon and evening.

    Take a look at one model projection below:

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    Photo credit: NBC10

    Rain chances will linger Sunday and Monday, but the rain won’t be as heavy or long-lasting, greatly reducing the threat of flooding. With clouds, showers and an east wind, temperatures will be cool, only warming into the mid- to upper-60s.

    How much rain are we talking through Monday? Another 1-2 inches.

    Unfortunately, rain this weekend will make it the SIXTH straight weekend with showers for Philadelphia. We haven’t had an entirely dry weekend in Philly since April 21-22.

    Here are the stats at Philadelphia International Airport:

    April 28 (0.14”) – April 29 (0.15”)
    May 5 (Trace) – May 6 (Trace)
    May 12 (1.49”) – May 13 (0.49”)
    May 19 (0.74”) – May 20 (0.01”)
    May 26 (0.85”) – May 27 (0.08”)

    How much rain fell on weekends in the last 5 weeks? 3.95 inches! Another couple inches (or more) may be added to this by Sunday.

    The light at the end of the tunnel hits Tuesday, when the region begins to FINALLY dry out.

    Updates to this forecast, including rain totals and neighborhoods under the biggest threat of flooding, will be posted online and on air in the days to come.