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Category: Historical Data

BALTIMORE BREAKS ITS ANNUAL PRECIPITATION RECORD

BALTIMORE BREAKS ITS ANNUAL PRECIPITATION RECORD

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November 15, 2018 was the day that Baltimore set its long-term record for greatest total precipitation in a calendar year. With 1.33″ of liquid precipitation being recorded by midnight, the 2018 total has now reached 63.01″, breaking the previous record of 62.66″ set in 2003. This data includes the official downtown locations from Jan. 1871 to July 1950, then Baltimore-Washington (nee Friendship) International Airport thereafter. With 6 weeks to go, any new precipitation will be gravy (not literally, and probably…

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Record-Wet 2018 Already for Several Maryland Locations

Record-Wet 2018 Already for Several Maryland Locations

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It has certainly been a wet year in the Free State, with several locations already exceeding their record-annual totals, mainly on the western side of the Chesapeake Bay. Some of these stations even have long-term periods-of-record so it’s not for lack of data that has allowed for the all-time totals. Here are the current National Weather Service Cooperative Observer Network and First-Order station totals as of this morning’s report (data either through the 13th or 14th, depending on how up-to-date…

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Baltimore’s Highest Rain Total at this Point in the Year

Baltimore’s Highest Rain Total at this Point in the Year

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The Baltimore Airport has recorded 2.22″ of rain today (as of the 5:00 P.M. EDT report), with a monthly total now of 6.31″ and bringing the annual total up to 51.57″ at this point in the calendar year.  This latter value supersedes the previous record of 50.63″ through Sept. 18, 1889 when official Baltimore records were kept at Holliday & E Baltimore Streets (SW Corner) at the Neal Office Building, near City Hall. The all-time full Calendar-Year record for Baltimore…

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Historic July Rains in Central Maryland

Historic July Rains in Central Maryland

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After a very dry start to July 2018 with only 0.03″ of rain through the 14th at the airport in Baltimore (Baltimore/Washington International Airport (BWI)), and just 0.41″ covering the 33-day period June 12 – July 14, 2018, historic amounts of rain began to fall in mid-July as a seemingly endless flow of moisture from the south occurred. Within the 10-day period July 16th-25th, 15.38″ fell at BWI, far exceeding any previous July total dating back to 1871 in the…

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2018: Maryland’s Record-Wettest & Third-Warmest Month of May

2018: Maryland’s Record-Wettest & Third-Warmest Month of May

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May of 2018 was the wettest ever recorded for Maryland as the Statewide average of 7.68” surpassed the previous record of 7.31”. The month actually started off quite dry through most of the first half (except for a fairly wet 2-day event from Frederick County and westward), then the deluges began, especially pummeling the Ellicott City area (Howard County and parts of Baltimore County), again, after this area was so devastated back in July 2016. Many news stations and newspapers…

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Baltimore’s Longest March Streak of Freezing Minimum Temperatures

Baltimore’s Longest March Streak of Freezing Minimum Temperatures

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For the 23 consecutive days from March 5th to March 27th, 2018, the Baltimore Airport (BWI) had minimum temperatures reach ≤32° each day, the longest such record for that location with a period-of-record back to 1951, as well as for the prior downtown locations dating back to 1871 in the historical record. The Average Minimum Temperature for this 23-day period was 28.5°, with a low temperature of 23° on both the 10th and 11th of the month. The minimum temperature at the…

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Christmas-into-the-New-Year Extreme Cold in Maryland

Christmas-into-the-New-Year Extreme Cold in Maryland

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Now that the cold weather has abated, for now, here are a few things that I’ve discovered occurred during this extended period from Christmastime through the first week of January: It wasn’t the coldest weather that has ever occurred in the state. It wasn’t the lengthiest cold weather to ever occur here. Though it wasn’t the coldest period, it kinda was in several ways. Some cold temperature records were broken but not many. Though the cold may not have been…

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Baltimore and Washington: Extreme Precipitation Within Their Political Boundaries

Baltimore and Washington: Extreme Precipitation Within Their Political Boundaries

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Most larger U.S. cities have one “official” National Weather Service (NWS) weather station for which climate data is recorded and archived. As we weather geeks know, that one location can be very unrepresentative of weather conditions compared with other parts of a city, especially as related to precipitation. Elevation and varying urbanization can provide great differences in temperatures while thunderstorms can drop prodigious amounts of rain in one part of a city, while other areas stay dry. This got me thinking…

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