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1/5-1/6 clipper system


Thundersnow12

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PRELIMINARY LOCAL STORM REPORT

NATIONAL WEATHER SERVICE DES MOINES IA

648 PM CST MON JAN 5 2015

0645 PM     SNOW             3 S POLK CITY           41.74N 93.72W

01/05/2015  E6.8 INCH        POLK               IA   OFFICIAL NWS OBS

            AT NWS OFFICE IN JOHNSTON

 

trying to find a liquid obs to go with that official report

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.37 in 5.8" as of 00z, so about 16:1, another inch since then may have raised ratio some.

 

not great....but certainly not horrible....

 

most of the snow falling here is very fine....but there are some decent flakes mixing in that I see flying by the street lamp which I wasn't expecting at this stage of the game per upstream obs

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rocking the ship back and forth all in one sentence

 

AREA FORECAST DISCUSSION  
NATIONAL WEATHER SERVICE QUAD CITIES IA IL  
713 PM CST MON JAN 5 2015  
   
UPDATE
 
 
ISSUED AT 710 PM CST MON JAN 5 2015  
 
TRENDS OF LOW LEVEL WARM ADVECTION AND TRACK OF CLIPPER SYSTEM  
SUGGEST HIGHEST SNOW ACCUM AXIS MAY NEED TO BE SHIFTED A BIT  
FURTHER SOUTHWEST TO CORRIDOR ROUGHLY TIER OR TWO OF COUNTIES  
WEST AND SOUTHWEST OF QUAD CITIES. CONCERNS THAT AMOUNTS MAY BE  
A BIT HIGH IN SOME AREAS FROM QUAD CITIES NORTHEAST BUT RAP MODEL  
TIME HEIGH SECTIONS SUGGEST SHOULD SEE BETTER DENDRITES NEXT  
FEW HOURS WITH BETTER ALIGNMENT OF FORCING AND DGZ... AND RADAR  
MAY BE BEARING THAT OUT WITH SOME INCREASE IN RETURNS NEAR/E OF  
CID.
THUS... NO CHANGES BEING MADE AT THIS POINT BUT CONTINUING  
TO ASSESS/MONITOR TRENDS.

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