Friday cleared out nicely in the early AM and we had a colder, sunny day with few clouds (cirrostratus mostly). Temperatures started out in the low 30s at sunrise, only rising to the upper 30s by mid-afternoon. Temperatures then dropped off before sunset and into the evening hours to the upper mid-20s. only into the mid 30s by midnight observation time.

The maximum temperature was 38.5° at 1428.

The minimum temperature was 26.9° at 2359. AM min was 33.4° @ 0800. 

Dew point temperatures ranged from a high of 29° @ 0522 down to a low of 18° @ 2109.

Relative humidity values ranged from a high of 74% @ 0522 down to a low of 47% @ 1456.

Barometric pressure ranged from a low of 30.26″ @ 0000 up to a high of 30.50″ @ 2251.

No rain or snow fell on Wednesday. December 2018 still has a total of 0.44″ of precipitation (liquid water equivalent) . The year-to-date precipitation is still 59.25″.

For now, I am working on a better link to get my VP2 data on Weatherlink. I migrated over to Weatherlink 2.0 and my data isn’t so easy to find securely. For now, weather underground must be used. I posting my data there every 5-10 minutes. My ID is KMDROCKV200 and my station is called “Gardens of Traville.” Data is online, normally just about in real-time. The web address for my data on weather underground is:

https://www.wunderground.com/personal-weather-station/dashboard?ID=KMDROCKV200

I contribute 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 is producing erratic values than my 4 inch gauge. 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.

Saturday should be partly cloudy and cold, with highs in the mid-upper 30s and lows in the mid 20s.

Sunday looks to turn cloudy and colder, highs in the mid 30s with lows in the mid 20s. It looks like the big storm to our south may stay that way and we miss out on snow (0 POP Sunday during the day). If we get any snow, it will be light and should be Sunday night and more likely in the southern portions of the DC Metro area.

Monday should be sunny and not quite as cold with highs in the upper 30s and lows in the mid 20s.

Tuesday should be sunny and a tad warmer with highs around 40° and lows in the mid 20s.

Wednesday looks to be mostly sunny, with highs in the low 40s and lows in the upper 20s. 

Friday’s midnight observations included a temperature of 26.9°, relative humidity 73%, barometric pressure 30.48″ and falling, and a dew point of 19.4° under clear skies.

Currently at 0644 the temperature is 22.4°, dew point temperature 19°, relative humidity 85%, and barometric pressure at 30.55″ and rising under clear skies. During the overnight, temperatures dropped through the mid to the lower 20s, under mostly clear skies.

Good morning from the Walrus on this Saturday.