[MCD] {Spam?} SWOMCD

Sun Mar 19 11:14:57 UTC 2006

ACUS11 KWNS 191117
SWOMCD
SPC MCD 191116 
NEZ000-SDZ000-191545-

MESOSCALE DISCUSSION 0313
NWS STORM PREDICTION CENTER NORMAN OK
0516 AM CST SUN MAR 19 2006

AREAS AFFECTED...WESTERN/SOUTH CENTRAL SD AND NORTH
CENTRAL/NORTHEAST NEB

CONCERNING...HEAVY SNOW 

VALID 191116Z - 191545Z

MODERATE/LOCALLY HEAVY SNOW WILL CONTINUE ACROSS WESTERN/SOUTH
CENTRAL SD AND NORTH CENTRAL INTO NORTHEAST NEB THROUGH MID MORNING.
SNOW RATES MAY REACH 1 IN/HR THROUGH 15Z...ESPECIALLY ACROSS WEST
CENTRAL/SOUTH CENTRAL SD AND NORTH CENTRAL NEB.

ON PERIPHERY OF WESTERN STATES BROAD TROUGH...SEVERAL SUBTLE
SHORTWAVE IMPULSES PER WV IMAGERY...LOW LEVEL WARM ADVECTION...AND
COUPLED UPPER JET STRUCTURE ARE CONTRIBUTING TO NORTHWEST-SOUTHEAST
ORIENTED PRECIPITATION SHIELD THIS MORNING FROM WEST CENTRAL SD TO
SOUTHEAST NEB. WHILE CURRENT TRENDS/SHORT TERM MODELS SUGGEST A
MODEST NORTHEASTWARD TRANSITION OF THE HEAVIER SNOW THROUGH EARLY
MORNING...INFLUENCE OF NORTHERN PLAINS HIGH PRESSURE AND LOW LEVEL
DRY ADVECTION WILL TEND TO HINDER LOW LEVEL SATURATION...LEADING TO
A SHARP DEMARKATION OF THE HEAVIER SNOW THIS MORNING ACROSS
CENTRAL/SOUTHEAST SD INTO NORTHEAST NEB.

THE MOST FAVORED CORRIDOR FOR MODERATE/LOCALIZED HEAVY SNOW THROUGH
MID MORNING WILL LIKELY BE ALONG A PHILIP SD TO
AINSWORTH-O'NEILL-COLUMBUS NEB AXIS. WITHIN THIS CORRIDOR...RUC
SOUNDINGS DEPICT A SUSTAINED DURATION OF AMPLE UVVS JUXTAPOSED WITH
A SATURATED DENDRITIC LAYER...IN ADDITION TO PRESENCE OF MODEST
POTENTIAL INSTABILITY.

..GUYER.. 03/19/2006

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

ATTN...WFO...FSD...OAX...ABR...GID...LBF...UNR...

44470341 45130244 44499988 42019723 41179706 40959785
41419929 42490077 43690197 43740312 

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