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February 13, 2021 Ice Storm Obs


WxUSAF
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3 minutes ago, Warm Nose said:

Transitioned to IP for a few minutes but back to very light ZR. Back edge of shield almost through here. Otherwise a big nothing-burger which is fine.

27.0/15.3

 

I didn’t realize this was supposed to end so soon.  Back edge already? Wow

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20 minutes ago, CAPE said:

It turns out 30 degree rain in mid Feb during the day is mostly just rain. Some light slushy ice coating deck railings etc, but most surfaces just wet. 

Might be more interesting if it is still precipitating later.

Yeah, down to 29.7 here, only surfaces that are shaded or very light color have decent accretion.  If this were at night or mid 20s might be more interesting.

Looks like precip will pull out before 5 pm.

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Had to drive into DC.  Roads are totally fine everywhere in Takoma Park and DC.  Some untreated areas of sidewalks are becoming sheets of ice though.  I saw one lady sliding down the parking lot ramp to target (not sure why she was walking on it in the first place) and I saw another guy glide a solid 6 feet across one of the grates above the metro. 

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roads seemed fine where i'm at around cabin john.  took some time to de-ice my jeep, though.  railing/trees have accretion.  a little bit on the sidewalks, but nothing on parking lots.  slicker conditions will likely arrive tonight especially with less cars on the road.

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2 minutes ago, snowfan said:

HRRR would result in ISW criteria for many.

As many of us hinted last night...

Not a surprise at all. We have so many events, including the 3/16" of ice here with the last event after 2.5" of snow, where we get a glaze that sneaks up on us. There were far more glaring model signals going into this event however, including a steadfast ECMWF, that were screaming ISW. 

 

 

 

 

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