Gaithersburg Maryland VP2 backyard report for Monday, September 17, 2012

Monday started out sunny, cool and dry but the storm to the south and the cold front from the NW started moving in, and a cloud cover took over in the afternoon, and the dew point temperature started creeping up into the 60s. Sprinkles of rain started falling just prior to obs yielding a trace for Monday, but after midnight the rain has started to become measureable, as so far 0.09" has fallen since midnight up to now (0143). Overnight the rain will continue to move in (90 POP) and get heavier by daybreak, but the real heavy stuff probably won't come in till the afternoon or early evening. Severe storms and flooding a possibility. Temps will stay in the 60s overnight, then low 70s with the cloud cover on Tuesday and a 100 POP for rain through the evening, with a 20 POP for more showers overnight, lows in the upper 50s. Wednesday should be clearing morning clouds off by afternoon with highs in the 70s and lows in the 50s. Thursday and Friday should be sunny and nice, with temps in the low to mid 70s and lows in the low-mid 50s. Saturday looks partly cloudy and a bit warmer, with a 40 POP for showers as another front passes on through. Sunday and Monday should be really nice with sun and high temps around 70, lows in the upper 40s. 

Monday's precipitation: T
September total precipitation: 0.61"

Annual YTD precipitation total: 26.21" 

VP2 data for Monday as follows:
High temp 73.2° (1421) (73.4° RS)
(RS stands for my Radio Shack wireless thermometer being used as a backup)
Low temp 50.1° (0700) (50.5° RS)
Obs temp tonight 68.1° (VP2) 68.2° (RS)
Peak Wind Gust 9 MPH from the E (1321) 
Relative Humidity ranged from a max of 96% (0825) to a low of 68% (1259)
Dew point temperatures ranged from 66° to 48°.
Pressures ranged from 30.14"(0746) to 29.98"(2339)

At midnight obs, temp was 68.1°(VP2)/68.2°(RS), Cldy with light rain, Winds 1 MPH from the ESE, Pressure 29.98" and falling, Humidity 92% with a dew point of 66°.

Currently at 0143 EDT, the temp is 67.8°(VP2)/68.0°(RS), Cloudy/Light-Moderate Rain, Winds 5 MPH from the E, Pressure at 29.93" and falling, humidity 95% with the dew point at 66°.

Currently the Eastern US radar screen is showing a big swath of rain over a good part of the region, heading here from the S and SW.

Kevin the Walrus of Gaithersburg signing off early on this Tuesday morning.