Partly sunny, mild AM, colder, windier PM update for West Rockville Maryland for Thursday April 19, 2018

Partly sunny, mild AM, colder, windier PM update for West Rockville Maryland for Thursday April 19, 2018

Thursday was partly cloudy, dry and milder in the AM, but by midday, light showers (.01″), menacing-looking stratocumulus clouds (see featured image) building fast from quickly increasing frontal activity and winds started to drop temps in the PM hours once again through the 40s through midnight obs, then into the mid 30s overnight to sunrise currently. Winds combined with the cold to produce wind chill temps sinking down well into the 30s. The Thursday maximum temperature was 58.9 @ 1108 while the Thursday minimum temperature was 41.6 @ 2235. The dew point temperatures were higher in the AM but went back down again in the colder, drier air in the PM, ranging from a high of 48 @ 1013 down to a low of 24 much later @ 2341. The barometric pressure started out low, reaching its daily mimimum value of 29.60″ at 0554, then raising slowly thereafter the rest of the day to hit its high for the day of 30.17″ much later @ 2339. Relative humidity values rose a bit today, ranging from a high of 86% @ 0923 down to a low of 46% @ in the afternoon drier air @ 1345.

Remember now you can get the VP2 data on Weatherlink. You can access the data through http://www.weatherlink.com/user/walrusman444

I am posting daily to weather underground. 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#history/ 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 does not report snow data, and reflects what is recorded automatically through the tipping bucket VP2 gauge. I use the data I post to cocorahs as my “official” precipitation total each day

Overnight Thursday into Friday was clear with slowly diminishing winds that allowed our temperatures to drop through the low 40s into the mid 30s from midnight to sunrise occurring currently. It doesn’t look like I am going to have a freezing minimum this morning unfortunately. Friday should be sunny with similar temps to Thursday with temperatures rising into the mid-upper 50s and lows tonight into the mid 30s. Saturday should be mostly sunny with highs in the low 60s and lows in the low 40s. Sunday should be mostly cloudy but with temps similar to Saturday. Monday should be partly cloudy with highs in the mid 60s and lows in the mid 40s. Tuesday looks cloudy with an 80 POP for rain, cooler with temperatures holding in the 50s all day.

On the Channel 4 radar at 0656 the 4 state region is clear. The closest precipitation area is some scattered snow showers over parts of Northern New England, particularly NE Maine into the Maritime provinces of Canada.

As of 0656 Friday, the data from the VP2 (coming from the ground radiation shield about 4 feet off the ground just under and out from the balcony) and the Lakewood WXBug station are as follows:

Sunny and cold.

Station Relative Location Temp  RH   DP     BP       Wind High/Low temp Thursday
VP2              Ground          34.8° 66% 24° 30.29″R   NA    58.9/41.6

The total precipitation in the cocorahs gauge was 0.01″ through midnight Thursday. The VP2 tipping bucket rain gauge under my balcony also recorded 0.01″ through midnight Thursday.

Thursday’s precipitation was 0.01″
April precipitation 2.43″
April snowfall 0.0″ (will be reported till the end of April)
The seasonal snowfall total is 12.0″.
Year-to-date precipitation total is 10.60″

WX Bug Lakewood 4500 ft, 33 68 23 30.27″R Calm G WSW 4
                              140° from station                    59/41
The Lakewood rain gauge reported 0.00″ of precipitation on Thursday. It is reporting a total of 2.16″ of precipitation for April and a 2018 year-to-date (YTD) amount of 13.03″. I still think the great disparity between the Lakewood WX Bug station precipitation amount total for the month and year and my cocorahs gauge based data is that Lakewood precip values are estimated/adjusted from radar.

At 2400 obs Thursday night the temperature from the VP2 was 41.6 RH 50% BP 30.16″S DP 24.4
Clear, colder, drying out at 2400

Good morning from the sunny, dry, cold home of the snowless walrus early on this Friday.

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