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Category: Extremes

FINALLY! Measurable Snow in Baltimore

FINALLY! Measurable Snow in Baltimore

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UPDATE: Early in the morning on Feb. 1, 2023, snow began falling in the Baltimore/DC. area, providing the first measurable snowfall for many. As of 7:00 AM, Baltimore-Washington International Thurgood Marshall Airport (BWI) had reported 0.2” while DC’s Reagan National Airport (DCA) and Washington-Dulles International Airport (IAD) both reported 0.4”. This was the 3rd latest first-measurable snowfall for Baltimore, with a snow archive going back to 1883 (when including the previous downtown locations). Now we wait for the first snowfall…

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Baltimore’s Calendar-Day Precipitation Record – July 9th

Baltimore’s Calendar-Day Precipitation Record – July 9th

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Baltimore’s Daily Precipitation record was broken on July 9, 2022 when 1.36” was recorded, superseding the previous record of 0.99” in 1970. Though these amounts are not unusual for July, what is unusual is that this was the last of the meteorological summer months of June, July, and August to not have a calendar day exceeding 1.00” of rain. Other months having each day with extremes of >1.00”: January,  March, September, and December). Baltimore’s official precipitation archive goes back to…

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Baltimore’s Late-Season Freezing Temperature

Baltimore’s Late-Season Freezing Temperature

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On April 29, 2022, the temperature dropped to 32°F. at Baltimore-Washington International Thurgood Marshall Airport (BWI), breaking the daily record of 33° from way back in 1874. This also established the 3rd latest freezing temperature ever recorded for Baltimore. The only two later-in-the-season times it’s reached freezing were on April 30, 1961 and May 11, 1966 when both dates also recorded 32°F.   Baltimore’s long-term temperature archive covers both the previous downtown locations (7/1872 to 7/1950) and BWI (8/1950-Present) and…

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Maryland’s Record-Warm October in 2021

Maryland’s Record-Warm October in 2021

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Statewide for Maryland, 2021 was the warmest October on record, dating back to 1895 in the climate archives. There are unofficial reports of valley temperatures in Garrett County getting below freezing during the month but none of the official stations got any lower than 33°F. (as of this posting), occurring on 10/20/2021 at the COOP station “Sines Deep Creek,” which is located on the Youghiogheny River, just northwest of the Deep Creek Lake dam at an elevation of 2,040 feet…

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Baltimore Sets Two Records on 11/11/2020

Baltimore Sets Two Records on 11/11/2020

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As Tropical Storm Eta moves northward along the west coast of Florida, a ton of partially associated moisture has been streaming all the way up through the Mid-Atlantic States. According to the NWS, Baltimore-Washington International Thurgood Marshall Airport received 1.91″ of rain on 11/11/2020, breaking the previous record of 1.34″ from 1987. Current radar is showing quite a bit more rain, some very heavy (numerous flood warnings are in effect), will continue falling on 11/12/2020, the record for that date…

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July 2020: The Hottest Month in Baltimore History

July 2020: The Hottest Month in Baltimore History

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Official weather records for Baltimore date back to 1871. Never, during these last 150 years, has the monthly Mean Temperature (the average between the daily Maximum and Minimum Temperatures) ever been higher than the 81.7° that occurred in July 2011 and the 81.5°, which was recorded in three other Julys – 2010, 1995, and 1949. July 2020 goes down in the record books with the new all-time highest Mean Temperature of 82.6° for any month, a departure of +5.6° from…

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Washington, DC Area Sets Top-10 April Rainfalls in 2020

Washington, DC Area Sets Top-10 April Rainfalls in 2020

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The final day of April catapulted both Dulles Airport and the longer-term Washington, DC into Top-10 total rainfalls for the month in their historical records. On April 30, 2020, the current official Washington, DC station at Reagan National Airport (located in Virginia, across the Potomac River from DC), started the day with a monthly total of 5.20″, requiring another 0.77″ to move into a tie for 10th place with the 5.97″ that fell in April 1952. The final total of 1.10″ on…

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Washington/Baltimore’s Paltry Number of Days ≤32°

Washington/Baltimore’s Paltry Number of Days ≤32°

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As the DC/Baltimore area is just about past its normal period of freezing weather in the Spring, it has been one of the milder seasons regarding freezing temperatures. Historically, most locations outside of the downtown areas have had freezing temperatures into May but, as the extended forecast is currently not showing any cold weather into early May, this current season, which runs July 1, 2019 – June 30, 2020, has been a record to near-record mild period. The airport in…

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RECORD RAINFALL FOR THE DC/BALTIMORE METRO ON 4/13/2020

RECORD RAINFALL FOR THE DC/BALTIMORE METRO ON 4/13/2020

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The storms that swept through the area on Monday, April 13, 2020 brought a National Weather Service-confirmed EF-1 Tornado to Frizzellburg (between Westminster and Taneytown in north-central Maryland), and very strong winds and subsequent damage (gusts to greater than 70 MPH!) to many parts of the DC/Baltimore Metro Area, and also record daily rainfall. Both Washington and Dulles basically doubled their previous record amounts (Washington’s official historical record dating back 150 years!). Here are the area’s three major airport record precipitation…

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Baltimore Sets Two Consecutive August Maximum Temperature Records

Baltimore Sets Two Consecutive August Maximum Temperature Records

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With an official temperature archive dating back to 1872, it’s rather difficult for Baltimore to set two consecutive maximum temperature records in the month of August. However, that is exactly what happened over the previous two days as the airport reached 96° on the 18th (tying the records from 2002, 1995, and 1965), then again on the 19th as the temperature soared to 99°, exceeding the previous record of 97° from way back in 1914. Granted, these were the two…

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