Preliminary observation thread

[WEATHER53]

Thin overcast 

35/22. High of 40

3.5F temp drop since 5pm 

[ovechkin]

Meanwhile DCA (which must really stand for Deathvalley CA  ) is hovering at 37-38 without much budging.

 

Weather53- what barometer readings do you look for in situations like this? Thanks. 

[WEATHER53]

53 minutes ago, ovechkin said:

Meanwhile DCA (which must really stand for Deathvalley CA  ) is hovering at 37-38 without much budging.

 

Weather53- what barometer readings do you look for in situations like this? Thanks. 

30.15-30.30 is golden, higher than that becomes suppressive and under 30.00 and we lose the cold air. This is at the onset and during the event ,  my current 30.37 will not be suppressive but is a good high point to start the fall from.  With a weaker low that is very well placed we can make it down to 29.85. There are exceptions but it’s a great indicator 

[WEATHER53]

9pm obs

Thin overcast

33.2/23

407’ elevation

30.37 and steady 

 

 

[ovechkin]

Thanks, very helpful. 
 

And temps not bad right now. Certainly don’t want to waste whatever flakes we may get.

[nj2va]

Aren’t we doing obs in the other thread?  Title reflects that.

[Kevin Shaw]

12:45 AM Wednesday - West Rockville MD 

Thin overcast 

Temp 31.9 Dew Point 22  RH 68%

Barometer steady at 30.34" 

Winds 1-3 MPH from the ESE 

 

[CAPE]

7 hours ago, nj2va said:

Aren’t we doing obs in the other thread?  Title reflects that.

Barometric pressure obs go here.

[WEATHER53]

11am opening obs 

light snow.  Snow commenced 10:10am.  Light dusting on grass and cars, most shaded concrete and some sun exposed concrete

32.1F, low of 30, baro 30.28 and falling 0.02 ph over last 3 hours 

[ovechkin]

Obs- rain in city. 
Other obs- nothing more frustrating weather wise than rain in DC and snow in PHL an NYC