Memorial Day Monday started out cloudy with a little light rain around 0700 (0.01″) then just cloudy and dry the rest of the day. No storms today, pretty calm day. Temperatures only warmed up into the low 70s with AM lows in the more pleasant low 60s. The Monday maximum temperature reached 72.0° @ 1657, while the Monday minimum temperature was 61.5° @ 0702. The dew point temperatures lowered from Sunday’s values, ranging from a low of 60° @ 0701 up to a high of 67° @ 1651. The barometric pressure rose some more from Sunday – lowest being 30.00″ @ 0257 up to a high of 30.10″ @ 1252. The relative humidity values were higher than Sunday, ranging from a high of 96% at 0304 down to a low of 82% at 1619.

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 precipitation data reflects what is recorded automatically through the tipping bucket VP2 gauge. I actually use the data I post to cocorahs from my 4″ cocorahs gauge I read manually as my “official” precipitation total each day.

Monday was cloudy, damp and relatively cool, with light showers in the early AM (0.01″). Temps only reached the low 70s by day, low 60s by night. Overnight into Tuesday we remained cloudy and damp, with dense fog developing just before sunrise (see today’s featured image), lifting gradually now but still limiting visibility to less than a mile. Temperatures have held in the mid-upper 60s overnight. During the day on Tuesday, cloudy skies should continue with highs in the mid 80s and lows in the upper 60s, with a 20 POP for rain. Wednesday should be partly cloudy with highs in the upper 70s, lows in the upper 60s and a 40 POP for PM thunderstorms. Thursday should be cloudy with highs in the mid 80s and lows in the upper 60s and a 90 POP for thunderstorms as the remnants of Alberto start affecting our area despite the dying center of circulation looking to remain well to the west. Friday should be partly cloudy, warm with highs in the mid 80s and lows in the upper 60s, with a 50 POP for PM thunderstorms. Saturday should be a bit cooler, cloudy, with an 80 POP for thunderstorms.

On the Channel 4 radar at 0758 is showing scattered showers well to our south in SE VA and much of North Carolina plus lighter and more widely scattered activity over parts of SW Virginia and West Virginia at this time.

As of 0758, 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 WX Bug station are as follows:

Cloudy, damp, and foggy (gradually lifting)

Station Relative Location Temp   RH  DP     BP     Wind High/Low temp on Monday
VP2             Ground           68.6° 97% 68° 30.02″S NA   72.0°/61.5°

The total precipitation in the cocorahs gauge was 0.01″ through midnight Monday. The VP2 tipping bucket reported 0.00″ of rain.

Sunday’s precipitation was 0.01″
May precipitation is now 6.04″
Year-to-date precipitation total is now 17.78″

WX Bug Lakewood 4500 ft, 68° 100% 68° 30.06″S WSW 4 G SW 8
                              140° from station                         73°/60°

The Lakewood rain gauge recorded 0.00″ of precipitation on Monday. Somehow, May is now showing 10.09″ for the month with the 2018 year-to-date (YTD) amount of 24.90″. These monthly and yearly totals rose about 3 inches from yesterday’s values, we did not get inundated with that much rain, I assure you. These radar estimations must be getting confused with the heavy rains associated with the Ellicott City flooding, which did not affect my location (or the less than a mile away Lakewood Country Club WX Bug station). I am hoping that adjustments will be made to these data sets in the next few days before May finishes out. I definitely continue to believe that at times 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 the Lakewood precip values are estimated/adjusted from radar.

At 2400 obs Monday night the temperature from the VP2 was 67.9° RH 94% BP 30.03″F DP 66.1°
Cloudy, milder, and muggy at 2400 Monday

Good morning from the cloudy, damp, and foggy home of the walrus on this Tuesday.