I have had some personal issues the past week or so and have not had the time to post my daily weather, plus I had a great snowstorm over the past weekend that took up a lot of my time observing and recording.. This post covers last week from Monday through Friday in brief terms with some items not posted as they will be taken care of in the next two posts. I will post the weekend snowstorm in my next post then catch up on this week on the post after that if all goes well. 

Monday was partly cloudy and colder with temperatures holding in the 30s. Cloudy in the evening ahead of Tuesday’s light showers. 

Monday

The maximum temperature was 38.2° at 0000.

The minimum temperature was 31.9° at 0337.

Dew point temperatures ranged from a low of 21° @ 0735 up to a high of 32° @ 2355.

Relative humidity values ranged from a low of 55% @ 1622 up to a high of 85% @ 2343.

Barometric pressure ranged from a high of 30.53″ @ 0921 down to a low of 30.20″ @ 2316.

Monday had no rain. 0.16″ is my January monthly total so far and also my year-to-date total for 2019.

Tuesday was mostly cloudy and milder, with low temps in the mid 30s early AM then rising to highs in the mid 50s by mid evening. Light rain fell in the very early AM then a bit heavier in the mid-evening. 

Tuesday

The maximum temperature was 54.9° at 2054.

The minimum temperature was 35.7° at 0051.

Dew point temperatures ranged from a low of 32° @ 0000 up to a high of 50° @ 2054.

Relative humidity values ranged from a high of 95% @ 0757 down to a low of 63% @ 2348.

Barometric pressure ranged from a high of 30.26″ @ 0002 down to a low of 29.63″ @ 2048.

Tuesday had 0.22″ of rain. Light rain fell between 0020-0200 then a bit heavier in evening showers between 2100-2130. 0.38″ is now my January monthly total and also my year-to-date total for 2019.

Wednesday had a snow flurry in the evening to accompany an advancing cold front which dropped the temperatures from around 50° at midnight down to the upper 20s 24 hours later just before midnight at the end of the observation day. Skies cleared out on increasing NW winds behind the frontal passage.

Wednesday

The maximum temperature was 50.6° at 0000.

The minimum temperature was 29.3° at 2359.

Dew point temperatures ranged from a high of 39° @ 0047 down to a low of 18° @ 2237.

Relative humidity values ranged from a low of 49% @ 0519 up to a high of 82% @ 1426.

Barometric pressure ranged from a low of 29.70″ @ 0000 up to a high of 29.91″ @ 2220.

Wednesday had 0.01″ of precipitation with a trace of snow in a late evening snow flurry.  0.39″ is now my January monthly total and also my year-to-date total for 2019. The trace of snow was the first snow of the year and the month of January.

Thursday was much colder with temps holding in the upper 20s and lower 30s all day under strong NW winds at times. I had a brief snow flurry around 0240. Skies eventually partially cleared as dew points dropped into the teens. 

Thursday

The maximum temperature was 33.7° at 1308.

The minimum temperature was 27.1° at 2359.

Dew point temperatures ranged from a high of 19° @ 0000 down to a low of 15° @ 0300.

Relative humidity values ranged from a high of 65% @ 0000 down to a low of 51% @ 1313.

Barometric pressure ranged from a low of 29.91″ @ 0000 up to a high of 30.20″ @ 2338.

Thursday had a trace  of precipitation and a trace of snow in an early morning (around 0240) snow flurry.  0.39″ is still my January monthly total and also my year-to-date total for 2019. There has been a trace of snow this month and therefore a trace also for 2019.

Friday was mostly sunny, less windy and seasonably cold, with highs in the mid 30s and lows in the mid 20s. There were high clouds later in the day, signifying the approach of the moisture from the weekend snowstorm at high levels of the atmosphere. 

Friday

The maximum temperature was 34.4° at 1517.

The minimum temperature was 25.5° at 0727.

Dew point temperatures ranged from a low of 15° @ 0001 up to a high of 18° @ 1019.

Relative humidity values ranged from a low of 46% @ 1555 up to a high of 69% @ 2240.

Barometric pressure ranged from a low of 30.20″ @ 0000 up to a high of 30.49″ @ 2312.

Friday had no precipitation.  0.39″ is still my January monthly total and also my year-to-date total for 2019.

There has been a trace of snow this month and therefore a trace also for 2019.

My current online data (except for rainfall/snowfall – use the cocorahs link shown below for that dataset) is showing regularly on Weather Underground. My data is posted there every 5 minutes. My ID is KMDROCKV200 and my station is called “Gardens of Traville.” Data is online, normally just about in real-time now as it is being updated on a 5 minute interval. The web address for my data on weather underground is:
https://www.wunderground.com/personal-weather-station/dashboard?ID=KMDROCKV200

I contribute my precipitation data daily to CoCoRaHS as Rockville 2.8 WNW, Station ID MD-MG-115 on https://www.cocorahs.org/

Please remember that Weather Underground precipitation data reflects what is recorded automatically through the tipping bucket VP2 gauge, just as it does on WxLink 2.0. The tipping bucket has been  producing erratic values at times so should not be used save for general precipitation timing. For example recently the bucket recorded 5.62″ for the day, clearly a significantly higher amount when compared to my 4 inch gauge total that day (3.24″). I actually use the data I post to CoCoRaHS from my 4 inch CoCoRaHS gauge I read manually as my “official” precipitation total each day.

Good very early morning from the Walrus on this cloudy Thursday morning.