I had a busy weekend so I haven’t posted since Thursday. So I will do my usual condensed all-in-one report for the past three days. 

On Friday, cooler, drier air moved in with evening temperatures dropping into the low 50s by midnight after highs in the mid 70s in the mid-afternoon under clearing partly cloudy skies. Dew point temperatures dropped all day, from the upper 60s at the very beginning of the day down to the upper 30s by late evening. 

The maximum temperature was 74.2 degrees at 1413. 

The minimum temperature was 50.7 degrees at 2359.

The dew point temperatures ranged from a high of 69 degrees @ 0031 down to a low of 39 degrees @ 2217.

The relative humidity values ranged from a high of 91% @ 0403 down to a low of 39% @ 1402.

The barometric pressure ranged from a low of 29.93 inches @ 0014 up to a high of 30.35 inches @ 2353.

The highest daily wind recorded across the street on the roof of the new USG building was 27 MPH that was recorded at 1148 from the E.

There was no precipitation on Friday so the October monthly total is a trace. The final September monthly total was 0.59 inches, which was the driest September here at my apartment location and second driest September ever since 1978 at both my Rockville and Gaithersburg locations. The driest ever was 0.25 inches in September 2005. The year-to-date total is 38.25 inches. Despite the rain this past Monday (9/30) we are still officially “abnormally dry” right now and very close to the moderate drought line.

On Saturday, the coolest temperatures so far this fall season moved in, with temperatures dropping into the mid 40s in the morning soon after sunrise, only rising into the mid 60s by mid-afternoon under mostly sunny skies. Dew point temperatures remained low all day, from the upper mid 30s in the early morning to the upper 40s by late evening. 

The maximum temperature was 64.9 degrees at 1446. 

The minimum temperature was 44.0 degrees at 0746.

The dew point temperatures ranged from a low of 37 degrees @ 0510 up to a high of 48 degrees @ 2359.

The relative humidity values ranged from a high of 77% @ 0648 down to a low of 50% @ 1437.

The barometric pressure ranged from a high of 30.44 inches @ 0954 down to a low of 30.31 inches @ 1922.

The highest daily wind recorded across the street on the roof of the new USG building was 17 MPH that was recorded at 1431 from the SSE.

There was no precipitation on Saturday so the October monthly total is a trace. The year-to-date total is 38.25 inches. Despite the rain this past Monday (9/30) we are still officially “abnormally dry” right now and very close to the moderate drought line.

On Sunday, clouds moved in ahead of an advancing warm front coming in from the SW, with warming of both the max and min temps during the entire day, particularly in the evening. Low temps in the upper 50s in the very beginning of the day, rising to the upper 60s by late afternoon, and holding there through the evening. Dew point temperatures rose all day, from the upper 40s at midnight at the very beginning of the day up to the low 60s by the following midnight at the end of the day.  

The maximum temperature was 69.8 degrees at 1707. 

The minimum temperature was 58.0 degrees at 0001.

The dew point temperatures ranged from a low of 48 degrees @ 0000 up to a high of 62 degrees @ 2357.

The relative humidity values ranged from a low of 70% @ 0000 up to a high of 86% @ 0629.

The barometric pressure ranged from a high of 30.32 inches @ 0000 down to a low of 30.21 inches @ 2357.

The highest daily wind recorded across the street on the roof of the new USG building was 23 MPH that was recorded at 1246 from the SSW.

There was no precipitation on Sunday so the October monthly total is still just a trace. The year-to-date total is 38.25 inches. Despite the rain this past Monday (9/30) we are still officially “abnormally dry” right now and very close to the moderate drought line.

My current online data 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, available in real-time 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

Unfortunately a recent development was found that is a discrepancy between my wxlink data and my VP2 display data. I noted this a week ago Friday when the low temperature came in as 50.2 degrees as I saw it in real time on my VP2 display, but on other sources tied in with wxlink I had a low of 52.8. Other variables also were a bit different. In a probably related development, I also continue to notice wind data for my station in wxlink (and therefore also in my weather underground data) a few days ago and has continued (Marty was here on Thursday and we have determined that this wind data is definitely coming from the recently installed and activated VP2 on the roof of the new USG (University of Shady Grove) building across the street from me. We still look for it online but haven’t found it yet, but it is transmitting its data to my wxlink station and now after Marty made the necessary adjustments also appearing in real time on my VP2 display. More updates will follow as they develop.

I contribute my precipitation data daily to CoCoRaHS as Rockville 2.8 WNW, Station ID MD-MG-115 and can be found on the web at https://www.cocorahs.org

Please remember that my 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 has been producing erratic values on most days (when I have had rain that is) so should not be used except for general precipitation timing.

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. I wasn’t able to do this very much in September unfortunately since precious little rain (only on three measurable days the entire month) fell from the sky.

The three day period was full of the usual activity from Friday through Sunday. This included the traditional rummikub game Friday evening, Saturday afternoon Badger football (won by Wisconsin 48-0 over hapless Kent State) and several other games, NFL Sunday with a loss by my Giants to the Vikings 28-10 and the homestanding Redskins to the mighty Patriots 33-7 (late breaking news are multiple reports say that Washington coach Jay Gruden has been fired sometime this Monday morning). I also watched the first two games of the ALDS, both won by the Yankees. I keep putting off making a Safeway grocery order, as I am getting low on some items, but still made some baked chicken and rice a roni for Sunday dinner, a frozen supreme pizza on Saturday, and oatmeal the past few mid-days as I have run out of my usual cold cereal.  

Mostly cloudy with rain showers on Monday with highs in the upper 70s and lows in the mid 50s.

Tuesday and Wednesday should be mostly cloudy with rain showers, highs in the low 60s and lows in the low 50s.

Thursday through Saturday should dry out with partly sunny skies, highs in the 65-70 range and lows in the upper 40s. 

On Midnight Sunday, cloudy skies with a temperature of 66.9 degrees, relative humidity 84%, pressure falling at 30.21 inches with the dew point temperature at 62 degrees. Winds were SSW at 5 MPH with gusts to 8 MPH from the SSW.

Currently at 0707 Monday morning the temperature is 67.4 degrees under cloudy skies, relative humidity at 77%, barometric pressure falling at 30.17 inches, and the dew point temperature at 60 degrees. Winds are ranging from 5-10 MPH from the SW.

Good morning from the walrus on this cloudy, increasingly damp Monday.