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Keeping Tabs on September Precipitation

Slightly above average for the month of September...
Posted at 12:04 PM, Sep 30, 2020
and last updated 2020-09-30 12:04:46-04

With it being the last day of September, I thought we would take a look back at how much rainfall we received this month and September rainfall totals over the last five years! The normal value of rainfall for the month of September is 4.03" and you can see that we were WELL below that in 2019 with only 0.16" measured. The year prior, we received more than double the average value of rain for the month of September in 2018 with a whopping 9.19" recorded!

The cold front that moved through the region last night, produced on average, .50-1.50" of rainfall in most locations across central Maryland. There were some spots that received over 2" of rain. For example, White Marsh, Essex, and Bel Air, measured more than 2" of rain in less than 24 hours. There was .74" of rain recorded at the BWI Airport this morning, bringing totals above average-- 4.39" at BWI.

As high pressure builds into the region today through tonight, the weather pattern remains dry so additional rain chances are very low across Maryland and the Mid-Atlantic region. High pressure will bring buckets of sunshine, breezy winds, and comfortable fall-like temperatures through the afternoon.

The next best chance for showers will be Thursday evening into Friday as a cold front slides through the state from west to east.