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Fear and loathing April, 2020 discussion, obs, and the occasional derailment


Typhoon Tip
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We lucked out today... high of 52F and only a few passing showers.  I guess that counts as "lucking out" given the weather in some other areas.  I was at least able to get out for an 8-mile walk to pass the time without getting wet.

Big orographic differences in precip with this one from east slope to west slope... only about 0.35" here but the other side of Smugglers Notch had 0.93" on the west slope with that low level NW flow under the NE mid-level flow, which usually leads to extremely blocked flow as winds aloft don't let the precip break over the crest.

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6 minutes ago, CoastalWx said:

I have almost 1.5” but the guy north of me has near 2” and he should have less then me. The fine drops and strong winds causing havoc. My Davis was doing fine until this morning. Big undercatch now.

You got a stratus to check against?

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3 minutes ago, powderfreak said:

You got a stratus to check against?

I should. Just a gauge I got a Lowe’s lol. My Davis I think needs calibration, but I don’t understand why it undercatches so much when it’s windy or heavy rain. I mean I expect some issues, but sometimes it’s 60% of what my other gauge gets. It was good until last night and then deviated night time. 

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14 minutes ago, CoastalWx said:

I should. Just a gauge I got a Lowe’s lol. My Davis I think needs calibration, but I don’t understand why it undercatches so much when it’s windy or heavy rain. I mean I expect some issues, but sometimes it’s 60% of what my other gauge gets. It was good until last night and then deviated night time. 

You ever notice if wind direction matters? 

I don’t know enough about automated rain gauges.  

Interesting project though to figure out.

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4 minutes ago, powderfreak said:

You ever notice if wind direction matters? 

I don’t know enough about automated rain gauges.  

Interesting project though to figure out.

I think when it’s very windy from the NE, trees affect it. When it’s not windy and not too heavy I don’t see the discrepancy. 

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4 minutes ago, powderfreak said:

You ever notice if wind direction matters? 

I don’t know enough about automated rain gauges.  

Interesting project though to figure out.

My experience is over collect large droplet heavy rains under collect fine mist windy days. But all in all within a tenth most times

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5 hours ago, CoastalWx said:

I should. Just a gauge I got a Lowe’s lol. My Davis I think needs calibration, but I don’t understand why it undercatches so much when it’s windy or heavy rain. I mean I expect some issues, but sometimes it’s 60% of what my other gauge gets. It was good until last night and then deviated night time. 

Do you have the new cone to cut down on turbulence over the gauge?

image.jpeg

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1 minute ago, Dr. Dews said:

thankfully that crapstorm is over and we can enjoy a decent weekend

Yup. Time to dry out and warm it up.


ECM MOS GUIDANCE



Station                    Lat     Lon  Elev(m)
Concord_Municip     NH US 43.20  -71.50   105
------------------------------------------------------------------
KCON   ECM MOS GUIDANCE    4/04/2020  0000 UTC

DT /APR   4            /APR   5                /APR   6          /

HR   06 09 12 15 18 21 00 03 06 09 12 15 18 21 00 03 06 09 12 18 00
X/N                    55          33          61          36    61
TMP  42 40 40 48 52 53 47 39 36 35 38 52 58 56 51 47 43 39 41 58 48
DPT  39 37 37 35 33 32 34 35 34 34 37 39 38 38 37 39 37 33 31 17 19
CLD  OV OV OV OV BK SC SC SC OV OV BK OV OV OV OV OV FW CL CL CL CL
WDR  02 01 35 36 02 10 06 00 00 00 00 21 23 19 29 30 30 32 31 28 30
WSP  06 06 07 08 05 04 01 00 00 00 00 03 05 05 05 06 04 02 03 11 09
P06         9     2     1     1     3     7    22    16     0  0  2
P12                     2           3          22          22     2
 

 

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18 minutes ago, CoastalWx said:

I don’t 

I noticed some improvement with that design with the small droplet rains.

Looks like SI has just the cone in stock.

https://www.scaledinstruments.com/shop/davis-instruments/parts/vantage-pro2-parts/rain-cone-and-parts/davis-6462/

P/N 6461 is the cone without the logo on it. Same price.

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