Sunday was a cloudy, cooler, still somewhat wet day (0.21″ AM rain  and fog) with flooding still occurring in scattered, flood-prone spots in the region. Using the records from my old station, I had 3 years that were wetter than this year ( 68.35″ in 1996, 65.47″ in 1979, and 64.16″ in 2003). Whether this year can approach any of those figures is still a matter of conjecture, but we do have another wet period coming late this week that should help get closer.  High temps reached the upper 40s after a morning min of 41.8° at 1145, the low temp for the day of 39.8° was not reached till 2205. Temperatures rose a bit after obs into the low 40s, and have held there during the overnight. Skies cleared overnight, and sun is just coming out right now (0725) 

The maximum temperature was 48.8° at 0014.

The minimum temperature was 39.8° at 2206.

Dew point temperatures ranged from a high of 48° @ 0014 down to a low of 37° @ 2206.

Relative humidity values ranged from a high of 96% @ 0341 down to a low of 90% @ 1922.

Barometric pressure ranged from a low of 29.84″ @ 1308 up to a high of 29.94″ @ 1903.

0.21″ of rain and drizzle fell on Sunday. December 2018 now has a total of 4.18″ of precipitation (liquid water equivalent) . The year-to-date precipitation is now 62.99″. These amounts should remain for now till more rain starts to fall at the end of this week. Unfortunately snow is not in future forecasts for the foreseeable future through Christmas, so a White Christmas looks rather unlikely for our immediate area.

My current online data (except for rainfall/snowfall – use cocorahs link shown before 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 is producing erratic values so should not be used save for general precipitation timing. For example on Saturday it recorded 5.62″ for the day, clearly a significantly higher amount when compared to my 4 inch gauge (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.

Area Flood Warnings continue in a few spots in the region through at least some of Monday.

Monday will be mostly sunny with high temps in the low 50s and lows in the upper 20s.

Tuesday should be sunny and colder, with highs in the low 40s and lows in the mid 20s.

Wednesday should be sunny with high temps in the mid 40s and lows in the low 30s.

Thursday will turn cloudy with a 90 POP for PM rain, temperatures remaining steady in the mid 40s most of the day.

Friday should warm up to a high of 60° with a low of 40° under cloudy, rainy (80 POP) skies. Another chance for flooding rains with this system. 

Sunday’s midnight observations included a temperature of 41.0°, relative humidity 90%, barometric pressure 29.92″ and falling, with a dew point of 38.3° under cloudy skies.

Currently at 0758 the temperature is 42.1°, dew point temperature 35°, relative humidity 77%, and barometric pressure at 29.92″ and rising under mostly clear skies, with scattered cirrostratus clouds covering small parts of the sky. During the overnight, temperatures held in the low 40s with clearing skies.

Good morning from the Walrus on this clear, drying out Monday.