A PARTLY CLOUDY TO CLOUDY, WARMER, HUMID WEATHER LATE AFTERNOON WET AND STORMY THEN COOLER EVENING UPDATE FOR WEST ROCKVILLE MARYLAND FOR TUESDAY SEPTEMBER 5 2017

A PARTLY CLOUDY TO CLOUDY, WARMER, HUMID WEATHER LATE AFTERNOON WET AND STORMY THEN COOLER EVENING UPDATE FOR WEST ROCKVILLE MARYLAND FOR TUESDAY SEPTEMBER 5 2017

Tuesday was a partly cloudy, warmer, more humid day with serious cloud buildups by late afternoon (see featured image for this post) that developed quickly into soaking thundershowers from about 1730 to 1930 (0.89″ total – max VP2 rain rate 6.55″/hour @ 1831). There was plenty of thunder and cloud to cloud and cloud to ground lightning in our severe thunderstorm warned area. The high temperature for the day reached the mid 80s before dropping to the upper 60s in the evening due to the cooling convective activity. We had warmer lows in the early AM (mid 60s), dew points were in the low-mid 60s to low-mid 70s. Now at 0543 we have cloudy skies with temperatures in the upper-mid 60s with dew points about the same. The Tuesday minimum temperature from the VP2 in the shelter on the ground below my balcony (65.0°) was recorded at 0658 while the maximum temperature (84.2°) was recorded at 1413. Dew point temps rose today, ranging from 63° up to 73°. Relative humidity values were a bit higher than yesterday (97% – 57%). Barometric values dropped from yesterday’s values, ranging from 29.85″ at 0000 down to 29.72″ at 1516.

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

We now have cloudy skies with temperatures in the mid 60s at 0543 Wednesday. Wednesday we should have cooler temps with cloudy skies and highs in the mid 60s, lows in the lower-mid 50s with a 70 POP for rain. Thursday through Saturday should return sunny skies to the forecast with only a few scattered clouds at times, highs in the low 70s and lows in the mid 50s on Thursday and Friday and 70° and 50° for highs and lows on Saturday. If she does pay us a visit in some form Irma should not arrive till later next week. Stay tuned for updates.

On Weatherbug at 0543 the radar is showing most of our earlier convective activity over on the Eastern Shore and parts of Delaware, moving NE. Also more showers in much of PA and the mountains of WV and western MD, also moving NE. Only widely scattered areas of showers can be found in our immediate region, probably not effecting my location for at least a few hours.

As of 0543 EDT, the data from the VP2 (coming from the ground radiation shield about 4 feet off the ground just under and out from the balcony), the Lakewood WXBug station and the USG VP2 station across the street are as follows :

Station Relative Location Temp RH DP BP Wind High/Low temp today
VP2 Ground 66.5 98 66 29.81F NA 84.2/65.0

There was 0.89″ of rain recorded on Tuesday (cocorahs gauge – now located off the apartment property across the street from my initial two locations just off the inactive putting green – near the Montessori School playground. No sprinklers there at all on this county property). My VP2 rain gauge recorded 1.16″ of rain. Max rain rate was 6.55″/hour @ 1831.

August precipitation was 4.39″ (believe this is in error – I will have to research the numbers in the next few days)

September precipitation through midnight obs tonight is 1.72″.

Year-to-date (YTD) precipitation total is 33.02″

VP2 Across the street (USG) 65.5 98 65 29.84F NA 86.8/66.4

There was no rain recorded in the USG gauge on Tuesday which is incorrect. There must be a major blockage of some sort in the gauge.

WX Bug Lakewood 4500 ft, 66 90.2 63.8 29.81F W 6 G W 10 
140° from station 87/65

The Lakewood rain gauge reported 0.55″ of rain on Tuesday.

Temp on the VP2 at 2400 was 66.8 RH 97% BP 29.81F DP 66.1.

Good morning from the cloudy, cooler, still humid Walrus early on this Wednesday morning.

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