September 4, 2017 West Rockville MD daily weather report by observer Kevin Shaw

September 4, 2017 West Rockville MD daily weather report by observer Kevin Shaw

Labor Day Monday was a mostly sunny, warmer, increasingly more humid day (esp late) but with no rain. The high temperature for the day reached the upper 70s (a bit cooler than the low 80s as forecasted yesterday), with mid 50s in the early AM, dew points were in the mid 50s to mid 60s. Now at 0346 we have clear skies with temperatures in the upper 60s with dew points in the mid 60s. The Monday minimum temperature from the VP2 in the shelter on the ground below my balcony (56.1°) was recorded at 0659 while the maximum temperature (79.1°) was recorded at 1319. Dew point temps rose a bit today, ranging from 55° up to 67°. Relative humidity values were about the same as yesterday’s (97% – 53%). Barometric values dropped from yesterday’s values, ranging from 30.05″ at 0707 down to 29.85″ at 2157.

Remember now you can get the ground-based VP2 data on Weatherlink. You can access the data through

We now have clear skies with temperatures in the upper 60s at 0346 Tuesday. Tuesday should be warmer with highs in the mid 80s and lows in the mid 60s with partly cloudy skies and a 60 POP for showers/storms later in the day. On Wednesday cooler temps with partly cloudy skies and highs in the mid 60s, lows in the mid 50s with a 70 POP for rain. Thursday and Friday 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 Weatherbug at 0346 the radar is showing a wide line of FROPA showers and storms running ENE to WSW, cutting through the NW half of PA and western NY state at the present time. Movement appears to be ESE and should reach our immediate area sometime during the day on Tuesday. Major hurricane Irma is still well out in the Atlantic, a day or less from the Antilles, and tracking towards the Virgin Islands, Puerto Rico and Cuba over the next few days. Models are generating tracks running all over the place, NHC forecasts should be consulted frequently to see what is transpiring in relation to our effects, if any, there will be in our region.

As of 0346 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 67.0 92 65 29.82S NA 79.1/56.1

There was no rain recorded on Monday (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).

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 0.83″.

Year-to-date (YTD) precipitation total is 32.13″

VP2 Across the street (USG) 69.4 87 65 29.85S NA 83.0/61.0

There was no rain recorded in the USG gauge on Monday

WX Bug Lakewood 4500 ft, 69 80 62.3 29.84S Calm G WSW 15
140° from station 83/57

The Lakewood rain gauge reported no rain on Monday.

Temp on the VP2 at 2400 was 71.2 RH 84% BP 29.85S DP 66.1.

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