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Mesoscale Discussion 46
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   MESOSCALE DISCUSSION 0046
   NWS STORM PREDICTION CENTER NORMAN OK
   0740 PM CST THU JAN 30 2014

   AREAS AFFECTED...CO FRONT RANGE/NORTHEAST CO

   CONCERNING...HEAVY SNOW 

   VALID 310140Z - 310615Z

   SUMMARY...SNOW WILL STEADILY INCREASE THROUGH MID/LATE EVENING
   ACROSS THE DENVER METRO VICINITY/I-25 URBAN CORRIDOR TO THE
   NORTHEAST CO HIGH PLAINS. SNOW RATES WILL AT LEAST LOCALLY EXCEED 1
   IN/HR FOR A MULTI-HOUR DURATION.

   DISCUSSION...EARLY EVENING WATER VAPOR IMAGERY FEATURES A
   FAST-MOVING/MODESTLY AMPLIFYING SHORTWAVE TROUGH OVER THE SOUTHERN
   GREAT BASIN WITH A PRECEDING BAROCLINIC LEAF STRUCTURE EVIDENT.
   DOWNSTREAM EASTWARD TRANSLATION OF THESE FEATURES/ASSOCIATED UVV AND
   INCREASING ISENTROPIC ASCENT IN TANDEM WITH A FRONT RANGE/HIGH
   PLAINS SLOPING FRONTAL ZONE WILL CONTINUE TO LEAD TO INCREASING
   PRECIPITATION RATES THIS EVENING. SURFACE TEMPERATURES HAVE QUICKLY
   COOLED TO AROUND/BELOW 32F ACROSS THE NORTHEAST CO HIGH PLAINS OVER
   THE PAST FEW HOURS...AND WITH A NEAR-32F WET-BULB LOW-LEVEL PROFILE
   EVIDENT PER THE 00Z DENVER OBSERVED SOUNDING...SNOW COULD BECOME
   MORE DOMINANT/HEAVIER NEAR THE DENVER METRO/I-25 VICINITY AS
   SATURATION CONTINUES TO OCCUR OVER THE NEXT FEW HOURS. INCREASING
   UVV/SATURATION COINCIDENT WITH AN APPROX 1KM DEEP DENDRITIC GROWTH
   ZONE /ABOVE 700 MB/ SHOULD SUPPORT 1+ IN/HR SNOW RATES THROUGH
   MID/LATE EVENING...INCLUDING THE DENVER METRO VICINITY AND OTHER
   NORTHEAST CO AREAS ESPECIALLY NEAR/NORTH OF I-70 AND NEAR I-76.

   ..GUYER.. 01/31/2014


   ATTN...WFO...GLD...BOU...

   LAT...LON   39430244 39330374 39730511 40430501 40770415 40240227
               39430244 

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Page last modified: January 31, 2014
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