SPC MD 319

MD 0319 CONCERNING HEAVY SNOW FOR FAR E-CNTRL KS…CNTRL MO…FAR W-CNTRL IL


MESOSCALE DISCUSSION 0319
NWS STORM PREDICTION CENTER NORMAN OK
0729 AM CDT SUN MAR 24 2013

AREAS AFFECTED...FAR E-CNTRL KS...CNTRL MO...FAR W-CNTRL IL

CONCERNING...HEAVY SNOW

VALID 241229Z - 241630Z

SUMMARY...BAND OF MODERATE TO HEAVY SNOWFALL WILL CONTINUE MOVING
EWD ACROSS CNTRL MO AS THE UPPER LOW PROGRESSES EWD. SOME
INTENSIFICATION OF THIS BAND IS POSSIBLE WITH SNOWFALL RATES LOCALLY
EXCEEDING 1 INCH PER HOUR.

DISCUSSION...RECENT RADAR IMAGERY AND SURFACE OBSERVATIONS DEPICT A
BAND OF MODERATE TO HEAVY SNOW ACROSS CNTRL MO /ALONG A LINE FROM
MKC TO DMO TO COU/. MOST OBSERVATIONS ARE CURRENTLY REPORTING
MODERATE SNOW AND 1/2 MILE VISIBILITIES WITH THE EXCEPTION OF IXD IN
FAR W-CNTRL KS WHICH IS REPORTING HEAVY SNOW. LIGHTNING HAS ALSO
BEEN OBSERVED OVER E-CNTRL MO /AROUND COU/.

RECENT RADAR IMAGERY SHOWS REFLECTIVITY ORIENTED ROUGHLY N-S FROM
CNTRL MO SWD INTO NERN AR WITH SOME EMBEDDED CONVECTIVE ELEMENTS.
RECENT WV SATELLITE IMAGERY HAS ALSO SHOWN A COOLING TREND IN CLOUD
TOP ROUGHLY ALONG THE SAME AREA. THIS MAY BE THE DEVELOPMENT OF A
MORE MOIST WARM CONVEYOR...WHICH WOULD THEN SUPPORT AN INCREASE IN
SNOWFALL RATES ACROSS CNTRL MO AND FAR W-CNTRL IL.
ADDITIONALLY...12Z SGF SOUNDING SHOWS A WEAKLY UNSTABLE LAYER
BETWEEN 700-500 MB...WHICH IS WITHIN THE FAVORED DENDRITIC GROWTH
ZONE.  AS SUCH...SOME INTENSIFICATION OF THE CURRENT BAND IS
POSSIBLE WITH SNOWFALL RATES LOCALLY EXCEEDING ONE INCH PER HOUR.

..MOSIER.. 03/24/2013

...PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT...

ATTN...WFO...ILX...LSX...SGF...EAX...

LAT...LON   38508993 37989161 37719299 37839440 37989481 38639503
            39339426 39789195 39769091 38998974 38508993

via SPC Forecast Products http://www.spc.noaa.gov/products/md/md0319.html