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February 16th-17th Obs & Nowcasting


nj2va

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0.5" contour runs right through DCA and 0.25" contour through Philly coming just north of the M/D line as you move west...everyone posting in this forum is 0.25"+

 

that's solid.  this is a rare event here given the temps.  radar looking good: http://weather.cod.edu/satrad/nexrad/index.php?type=LWX-N0Q-1-24

 

this is a good time to take a break and regroup.

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Find your yard and pick which ratio you want to use. I'm going 15:1

 

attachicon.gifeuroqpf.JPG

 

So a 6-10 event for just about everybody. Great stuff. It nowcast time. I just posted these in the banter thread which got out of control. But check out these ratios:

 

150216/2100Z 9 13004KT 15.2F SNOW 24:1| 0.4|| 0.00|| 0.00|| 0.019 24:1| 0.4|| 0.00|| 0.00|| 0.02 100| 0| 0

150217/0000Z 12 13007KT 13.2F SNOW 21:1| 1.5|| 0.00|| 0.00|| 0.069 22:1| 1.9|| 0.00|| 0.00|| 0.09 100| 0| 0

----------------------------------------------+----++-----+-------------++--------------++-------------++-----------+---+---

150217/0300Z 15 12006KT 12.6F SNOW 25:1| 1.3|| 0.00|| 0.00|| 0.051 23:1| 3.2|| 0.00|| 0.00|| 0.14 100| 0| 0

150217/0600Z 18 13005KT 12.6F SNOW 16:1| 0.5|| 0.00|| 0.00|| 0.033 22:1| 3.7|| 0.00|| 0.00|| 0.17 100| 0| 0

150217/0900Z 21 VRB02KT 13.4F SNOW 24:1| 1.1|| 0.00|| 0.00|| 0.048 22:1| 4.9|| 0.00|| 0.00|| 0.22 100| 0| 0

150217/1200Z 24 VRB02KT 10.3F SNOW 21:1| 0.2|| 0.00|| 0.00|| 0.008 22:1| 5.0|| 0.00|| 0.00|| 0.23 100| 0| 0

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I want to echo concerns about a closure tomorrow. Need to still be snowing at a good clip and have a nice blanket around 3am when the decision is made

 

With how cold it's going to be, I'm pretty sure closure if 6"+ verifies. Cleanup even on interstates is going to be tough to do quickly. 

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