Wednesday started out the day with light rain at midnight, but changed over to light snow by 2 AM, lasting about an hour, only accumulating 0.3 inches on only grassy/bushy surfaces and nothing on the roads or sidewalks. Well before sunrise the snow and precipitation stopped, as temps held overnight around 31 degrees then slowly rose to 32 then 33 degrees by mid-morning. Partly cloudy, cold conditions held fort the rest of the day, only reaching the mid 30s by mid-afternoon. The very light accumulation of snow was melted off by late afternoon in most spots. Temps did drop to the 30 degree mark by midnight observation. Dew points started out in the mid 30s at the start of the day during the rain, but fell overnight into the 20s, then as the cold, dry air really moved in by early afternoon, dropped into the upper 10s by early afternoon and held there the rest of the day. 

The maximum temperature was 37.5 degrees at 1528.

The minimum temperature was 30.0 degrees at 2359.

The dew point temperatures ranged from a high of 34 degrees @ 0000 down to a low of 18 degrees @ 1323.

The relative humidity values ranged from a high of 93% @ 0047 down to a low of 49% @ 1711.

The barometric pressure ranged from a low of 30.19 inches @ 0000 up to a high of 30.62 inches @ 2352.

The highest daily peak wind gust recorded across the street on the roof of the new USG building was 33 MPH at 1300 from the NW.

There was 0.05 inches of precipitation on Wednesday. My December monthly total precipitation is now 1.50 inches.

There was 0.3 inches of snow on Wednesday. My seasonal total snowfall is 0.3 inches. The year-to-date precipitation total is now 44.61 inches.

Thursday started out clear and cold overnight, with AM lows in the upper mid 20s. Barometric pressure continued to rise, and reached 30.79 inches just after 10 AM, my highest reading since I hit 30.80 inches back on February 9, 2019.. High temperatures only reached the mid 30s by mid-afternoon on a cold, increasingly cloudy day, but with diminishing winds. Dew points were lowest in the mid-morning (mid 10s) but slowly rose the rest of the day to the low 20s by the very end of the day. 

The maximum temperature was 37.0 degrees at 1506.

The minimum temperature was 27.6 degrees at 0706.

The dew point temperatures ranged from a low of 15 degrees @ 0842 up to a high of 23 degrees @ 2351.

The relative humidity values ranged from a high of 70% @ 0147 down to a low of 45% @ 1524.

The barometric pressure ranged from a high of 30.79 inches @ 1009 down to a low of 30.58 inches @ 2358.

The highest daily peak wind gust recorded across the street on the roof of the new USG building was 12 MPH at 0102 from the NW.

There was no precipitation on Thursday. My December monthly total precipitation is 1.50 inches.

There was no snow on Wednesday. My seasonal total snowfall is 0.3 inches. The year-to-date precipitation total is now 44.61 inches.

My current downstairs station data is now 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, available in real-time 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 and can be found on the web at https://www.cocorahs.org

Please remember that my 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 on most days (when I have had rain that is) so should not be used except for general precipitation timing.

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.

Thursday was a busy day at times. I got up in time to take a shower before our weekly evening trivia game, then had two cheeseburgers grilled on the Foreman grill and some tater tots cooked in the oven. I had plenty of water throughout the day, and also washed my bedding. The scheduled visit by my sanitary engineer was postponed till Saturday afternoon as we couldn’t mesh with our available times on Thursday. I talked with Ray about the upcoming Friday inclement weather, and with Robin late on her way home from work. Gideon has been with his father since Tuesday, but Robin will get him Friday morning to return him to their house, grandma and the pets. They might be visiting Santa sometime during the day. 

Friday has been cloudy so far with light rain starting to fall over the past hour or so. There was a thought it might start as freezing rain, but temps have risen to above freezing and no freezing has been noted. Periods of rain with high temps in the mid 40s should be the rule most of the rest of the day. 

Saturday should feature clouds and more rain, milder with highs in the upper 40s and lows in the upper 30s.

Sunday should be partly to mostly sunny and seasonable, with highs in the upper 40s and lows in the low 30s.

Monday should find clouds and rain returning, with highs around 40 and lows in the upper 30s.

Tuesday should be cloudy and rainy, milder, with high temps in the mid 50s and lows dropping to the upper 20s late.

Wednesday should be mostly sunny and cold, with highs in the mid 30s and lows in the lower 20s.  

At Midnight Thursday, cloudy skies with a temperature of 32.2 degrees, relative humidity 67%, pressure falling at 30.58 inches with a dew point temperature of 22 degrees.

Currently at 0951 EST Friday the temperature is 34.9 degrees under cloudy skies with some light rain at times, relative humidity at 89%, barometric pressure falling at 30.38 inches, and the dew point temperature at 32 degrees. Winds are averaging 2 MPH over the past 10 minutes from the E. Peak wind gust since midnight has been 10 MPH
from the E at 0400. A trace of rain so far has fallen since midnight according to my VP2 tipping bucket. 

Good morning from the walrus on this cloudy, slightly rainy Friday.