Monday was a sunny to partly cloudy day,  milder in the afternoon, and dry as flooding abates in most locations but still around for some, such as Whites Ferry in NW Montgomery County which remains closed due to high water.  . High temps reached the low 50s in the mid-afternoon, after steady temps in the low 40s overnight, then temps dropping to the low for the day at midnight when temps fell into the upper 30s. Overnight tonight skies were clear and temps dropped into the mid 30s as we approach sunrise.  

The maximum temperature was 53.2° at 1410.

The minimum temperature was 38.6° at 2359.

Dew point temperatures ranged from a high of 40° @ 0129 down to a low of 26° @ 2341.

Relative humidity values ranged from a high of 91% @ 0023 down to a low of 42% @ 1425.

Barometric pressure ranged from a low of 29.82″ @ 1407 up to a high of 30.00″ @ 2335.

No rain or drizzle fell on Monday. December 2018 still has a total of 4.18″ of precipitation (liquid water equivalent). The year-to-date precipitation is still 62.99″. These amounts should remain stable till the end of the week, either Thursday or Friday. 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 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.

Area Flood Warnings continue in a few spots in the region through at least into Tuesday.

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

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

Thursday will turn cloudy with a 100 POP for rain, temperatures remaining steady in the mid 40s most of the day.

Friday should warm up to a high near 60° with a low of 40° under cloudy, rain showery (80 POP) skies. Another chance for flooding rains with this system. Saturday will dry out and cool off with partly cloudy skies, highs in the mid 40s, lows around freezing.

Monday’s midnight observations included a temperature of 38.6°, relative humidity 61%, barometric pressure 30.02″ and rising, with a dew point of 26.3° under clear skies.

Currently at 0632 the temperature is 36.4°, dew point temperature 24°, relative humidity 60%, and barometric pressure at 30.12″ and rising under mostly cloudy skies (high thin overcast)  During the overnight, temperatures dropped through the upper 30s into the mid 30s towards sunrise. 

Good morning from the Walrus on this drying out Tuesday.